POOL CLEANING DEVICE

Description

FIELD

The present disclosure relates to pool cleaning apparatuses, and in particular to a pool cleaning device for a pool.

BACKGROUND

Demand for swimming pools and for above-ground pools is rising, and accordingly, there is a need for convenient and quick cleaning devices to meet the demand for cleaning the pool. For an above-ground swimming pool, as use increases, the inside of the pool produces algae, debris, leaves and other dirt. Accordingly, it is necessary to use a pool cleaning device to clean the pool, especially the bottom of the pool, regularly to maintain hygiene.

Pool cleaning devices are often equipped with a hydraulic drive assembly to drive the pool cleaning device to move the device within the pool to clean the bottom of the pool. When the pool cleaning device is used, an additional water pump is used, and the water pump is connected to the hydraulic drive assembly via a water tube to supply high pressure water to the hydraulic drive assembly. The hydraulic drive assembly accordingly drives the pool cleaning device to move within the pool by way of the high pressure water supplied by the water pump to the hydraulic drive assembly. The water pump is arranged outside the pool and the water tube is located inside the pool, which can become entangled during the movement of the pool cleaning device, which affects a desired and proper operation of the pool cleaning device, resulting in decreased performance of the pool cleaning device.

SUMMARY

For the foregoing technical problems, the present disclosure provides a pool cleaning device. The pool cleaning device includes: a housing, having a water inlet and a water outlet; a drive assembly disposed inside the housing and having an output shaft extending at least partially through the water outlet; and a water spray assembly rotatably disposed on the housing and in fluid communication with the water outlet, the water spray assembly including: a water spray housing; and an impeller disposed in the water spray housing and connected to the output shaft.

In one embodiment, the housing also includes at least one through hole, and the pool cleaning device includes a charging base including: at least one base, one of the at least one base being disposed at a location of a respective one of the at least one through hole; at least one charging post, one of the at least one charging post extending in a vertical direction and being disposed on a respective one of the at least one base, and including: a conductive rod extending in the vertical direction and being disposed within a respective one of the at least one through hole; and a sealing layer disposed on the conductive rod and covering at least part of the conductive rod.

In one embodiment, the at least one base includes: a first base having a first extension extending along a side wall of the first base; and a second base spaced apart from the first base and having a second extension extending along a side wall of the second base toward the first extension; wherein the first extension and the second extension are spaced apart from each other so as to define a slot between the first extension and the second extension.

In one embodiment, the drive assembly includes: a motor housing having a first part and a second part sealingly connected to the first part; and a motor assembly disposed within a second chamber jointly defined by the first part and the second part; wherein the conductive rod extends from the interior of the second chamber through the first part and is sealingly connected to the first part.

In an embodiment, the motor housing also includes a mounting plate disposed on an inner surface of the first part and extending toward the interior of the second chamber, the mounting plate defining a mounting space with the first part of the motor housing; and the motor assembly comprises: a motor comprising the output shaft extending in the vertical direction through the water outlet; a PCB disposed within the mounting space and spaced apart from the first part, the PCB and the first part having a sealant disposed therebetween; and a battery pack comprising a battery pack housing and a battery cell located within the battery pack housing, the battery pack housing and the battery cell having a sealant disposed therebetween.

In an embodiment, the housing comprises an upper housing and a lower housing, the water outlet is disposed on the upper housing, the water inlet is disposed on the lower housing, and the upper housing and the lower housing are detachably connected to define a first chamber.

In an embodiment, the pool cleaning device further comprises: a handle assembly disposed on the upper housing and comprising: a handle frame connected to the upper housing and extending downward toward the lower housing; and a resilient handle disposed on and hingedly connected to the handle frame, the handle comprising a boss extending toward the first chamber.

In an embodiment, the lower housing comprises a flange extending away from the first chamber, the boss of the handle being adapted to the flange to disassemble or assemble the upper housing and the lower housing.

In an embodiment, the pool cleaner device further comprises a reversing assembly comprising: a reversing blade disposed on the housing and comprising a rotating shaft and an opening having a first end wall, the reversing blade being rotatably connected to the housing by the rotating shaft; and a sliding plate comprising a baffle plate extending from a surface of the sliding plate toward the interior of the opening, the sliding plate being mounted on the opening of the reversing blade and adapted to slide relative to the reversing blade toward or away from the rotating shaft of the reversing blade; and an elastic member disposed inside the opening and located between the baffle plate and the first end wall of the opening, the clastic member being configured to switch between a compressed state and a released state.

In an embodiment, a limiting projection is disposed on the housing, and the limiting projection comprises a first wall and a second wall extending upward in the vertical direction; the sliding plate abuts against the second wall when the elastic member is in the compressed state, so that the reversing blade is at a first angle to the vertical direction; and the sliding plate rotates over the second wall and against the first wall when the elastic member is in the released state, so that the reversing blade is at a second angle to the vertical direction; wherein the first angle is greater than the second angle.

In an embodiment, one of the reversing blade and the sliding plate is provided with a guide groove extending in a sliding direction of the sliding plate; and the other of the reversing blade and the sliding plate is provided with a guide rail that matches the guide groove.

In an embodiment, the pool cleaning device further comprises: a wheel chamber extending in a first direction and disposed on the lower housing of the housing, wherein the wheel chamber is provided with a first constraint structure and a second constraint structure on both sides along a second direction perpendicular to the first direction, respectively; and a front wheel comprising: a wheel body spaced apart within the wheel chamber; and an axle spanning the wheel chamber in the second direction and comprising a first end and a second end, wherein the first end of the axle is rotatably connected to the first constraint structure, and the second end of the axle oscillates in the first direction within a constraint range of the second constraint structure to steer the front wheel.

In an embodiment, the second constraint structure comprises: a limiting plate; and an adjustment switch disposed on the lower housing of the housing and comprising a stop lever opposite and spaced apart from the limiting plate in the first direction; wherein the second end is configured to oscillate between the limiting plate and the stop lever.

In an embodiment, the adjustment switch also comprises a shift lever connected to the stop lever, and an angle of greater than 90 degrees and less than or equal to 180 degrees is formed between the stop lever and the shift lever.

In an embodiment, the pool cleaning device further comprises: a wheel chamber cover disposed on the lower housing of the housing and comprising an arc-shaped sliding groove; wherein the sliding groove comprises a first limiting end and a second limiting end, and an end of the shift lever is disposed within the sliding groove and slidably positioned between the first limiting end and the second limiting end; the axle is arranged between the wheel chamber cover and the lower housing of the housing; when the end of the shift lever is located at the first limiting end of the sliding groove, the stop lever and the limiting plate define a first range of oscillation at the second end of the axle; when the end of the shift lever is located at the second limiting end of the sliding groove, the stop lever and the limiting plate define a second range of oscillation at the second end of the axle; and the first range of oscillation is greater than the second range of oscillation.

In an embodiment, the first constraint structure comprises a first stop post and a second stop post, the first stop post and the second stop post being spaced apart in the first direction; and the first end of the axle is disposed between the first stop post and the second stop post and is in rotatable contact with the first stop post and the second stop post.

In an embodiment, when the first range of oscillation is set: forward movement of the pool cleaning device shifts the second end of the axle against the stop lever and the pool cleaning device is directed forward and to the left; and rearward movement of the pool cleaning device shifts the second end of the axle against the limiting plate and the pool cleaning device is directed rearward and to the right.

In an embodiment, when the second range of oscillation is set: forward movement of the pool cleaning device shifts the second end of the axle against the stop lever and the pool cleaning device is directed forward and straight relative to a major axis of the pool cleaning device; and rearward movement of the pool cleaning device shifts the second end of the axle against the limiting plate and the pool cleaning device is directed rearward and to the right.

In an embodiment, a pool cleaning device includes: a housing having a water inlet and a water outlet; a drive assembly disposed inside the housing and having an output shaft extending at least partially through the water outlet; and a water spray assembly rotatably coupled to the housing and in fluid communication with the water outlet, wherein the water spray assembly includes a water spray housing and an impeller disposed in the water spray housing, wherein the impeller is connected to the output shaft of the drive assembly, wherein the impeller receives water through the water outlet, and the water spray housing projects the water from the impeller and out of the water spray housing and provides a driving force for the pool cleaning device; a reversing blade coupled to the housing and pivotable relative to the housing in response to movement of the pool cleaning device.

In an embodiment, wherein a resistance force provided by water during movement pivots the reversing blade to a forward pivoted position or a rearward pivoted position, such that forward movement of the pool cleaning device pivots the reversing blade to the rearward pivoted position and rearward movement of the pool cleaning device pivots the reversing blade to the forward pivoted position; wherein the reversing blade is moveable to an upright positioned between the forward and rearward pivoted position in response to a buoyant force applied to the reversing blade when the pool cleaning device is stationary; wherein the water spray assembly is blocked from rotation during forward and rearward movement when the reversing blade is in the forward or rearward pivoted position; wherein the water spray assembly is rotatable when the reversing blade is in the upright position, such that when movement of the pool cleaning device is blocked by a pool wall, the reversing blade will move from the forward or rearward pivoted position to the upright position, and the water spray assembly will rotate to drive the pool cleaning device in an opposite direction; wherein at least one wheel of the pool cleaning device is configured to oscillate within an adjustable oscillation range to adjustable set a forward and/or rearward cleaning path of the pool cleaning device.

The beneficial effects of the present disclosure are as follows. The pool cleaning device of the present disclosure is equipped with a drive assembly and a water spray assembly. Water in the pool is driven by the drive assembly into the water spray assembly and then ejected from the water spray assembly to power the pool cleaning device. Therefore, no additional water pump is required for the pool cleaning device of the present disclosure, nor a water tube is used to connect the pool cleaning device inside the pool, which facilitates the use of the pool cleaning device of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

With reference to non-limiting examples of exemplary embodiments of the present disclosure, the present disclosure will be further described in the following detailed description in view of several drawings.

FIG. 1 shows a pool cleaning device according to an embodiment of the present disclosure.

FIG. 2 shows a cross-sectional view of a pool cleaning device.

FIG. 3 shows a charging base.

FIG. 4 shows a cross-sectional view of a charging base.

FIG. 5 shows a charging plug.

FIG. 6 shows a state of the charging plug mated with the charging base.

FIG. 7 shows a cross-sectional view of a motor housing and a motor assembly.

FIG. 8 shows a cross-sectional view of a battery bank.

FIG. 9 shows a housing with an upper housing connected to a lower housing.

FIG. 10 shows a handle assembly.

FIG. 11a shows a mating relationship of a reversing assembly with the housing, with a reversing blade at a first angle to a vertical direction.

FIG. 11b shows a mating relationship of the reversing assembly with the housing, with the reversing blade at a second angle to the vertical direction.

FIG. 12a shows a sliding plate.

FIG. 12b shows part of the reversing blade.

FIG. 12c shows a state of the sliding plate and the reversing blade assembled together.

FIG. 13a shows a wheel assembly mounted on a bottom wall of the housing.

FIG. 13b shows a mounting structure of a front wheel.

FIG. 14 shows a state of the front wheel when the pool cleaning device is moving in a rectangular pool.

FIG. 15 shows a first state of the front wheel.

FIG. 16 shows a second state of the front wheel.

FIG. 17 shows a movement trajectory of the pool cleaning device within the rectangular pool.

FIG. 18 shows a state of the front wheel when the pool cleaning device is moving in a circular pool.

FIG. 19 shows a third state of the front wheel.

FIG. 20 shows a fourth state of the front wheel.

FIG. 21 shows a movement trajectory of the pool cleaning device within the circular pool.

DETAILED DESCRIPTION

The objectives, technical solutions, and advantages of the present disclosure will be clearly and completely described with reference to specific embodiments of the present disclosure and corresponding figures. As will be apparent, the described embodiments are example embodiments of the present disclosure. Additional embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure accordingly fall within the scope of the present disclosure.

In the present disclosure, the directional term “vertical direction” refers to a direction generally along the height of a pool cleaning device; the directional term “upper” refers to a direction away from the ground in a vertical direction; and the directional term “lower” refers to a direction toward the ground in the vertical direction. The directional term “first direction” refers to a direction generally along forward or backward movement of the pool cleaning device, and for an oval-shaped pool cleaning device of the present disclosure, generally refers to a direction along a major axis of the pool cleaning device; and the directional term “second direction” refers to a direction generally perpendicular to the first direction, and for the oval-shaped pool cleaning device of the present disclosure, generally refers to a direction along a minor axis of the pool cleaning device. The directional term “rear” refers to a direction generally along a backward direction of the pool cleaning device; and the directional term “front” refers to a direction generally opposite to the “rear” direction.

FIG. 1 illustrates a pool cleaning device 1 according to an embodiment of the present disclosure. In conjunction with FIGS. 1 and 2, the pool cleaning device 1 includes a housing 2, a drive assembly 6, and a water spray assembly 4. Each of the components will be described in further detail throughout the disclosure.

As shown in the cross-section of FIG. 2, the housing 2 includes a water inlet 201 and a water outlet 202. The housing 2 includes an upper housing 21 and a lower housing 22, the upper housing 21 and the lower housing 22 being assembled together to form the housing 2 and defining a first chamber 206 inside the housing 2. A water flow channel 20 is formed inside the housing 2. The water inlet 201 is an inlet of the water flow channel 20 and is disposed on the lower housing 22, and the water outlet 202 is an outlet of the water flow channel 20 and is disposed on the upper housing 21. The water inlet 201 is disposed at the bottom of the housing, in the lower housing 22, and the water outlet 202 is disposed at the top of the housing 2, in the upper housing 21.

The drive assembly 6 is disposed inside the housing 2 (i.e., within the first chamber 206) and includes an output shaft 614 that extends at least partially through the water outlet 202.

The water spray assembly 4 is rotatably disposed on the housing 2 and is in fluid communication with the water outlet 202. For example, the water spray assembly 4 is rotatably disposed at the position of the water outlet 202 by an optional bearing 207. It will be appreciated that in other embodiments, the water spray assembly 4 may be rotatably connected to the housing 2 in other ways. In one example, the water spray assembly 4 may be provided with an annular sliding groove, and the housing 2 may have a flange which fits into the sliding groove. The water spray assembly 4 includes a water spray housing 403 and an impeller 41 disposed in the water spray housing 403. The impeller 41 is connected to the output shaft 614 of the drive assembly 6, and the output shaft 614 is configured to drive the impeller 41 to rotate about its axis. In the illustrated embodiment, the water spray housing 403 optionally includes an upper housing 401 and a lower housing 402, where the upper housing 401 and the lower housing 402 are connected to form the water spray housing 403. It will be appreciated that in other embodiments, the water spray housing 403 may also have other structure, for example, the water spray housing 403 may be integrally formed, or the water spray housing may have more than two connected portions.

During operation of the pool cleaning device 1, the output shaft 614 of the drive assembly 6 drives the impeller 41 to rotate at a high speed. Thus, under the drive of the impeller 41, water from the pool will enter the water flow channel 20 through the water inlet 201 and then be routed via the flow channel 20 (indicated via arrows B) into the water spray assembly 4 through the water outlet 202, and finally, the water is sprayed out of the water spray assembly 4. For example, the water spray assembly 4 includes a nozzle 404 on a circumferential side wall. The water is ejected from the nozzle 404, and a corresponding water flow path is generated, as indicated by arrows in FIG. 2 exiting the nozzle. The flow of water from the water spray assembly 4 powers the pool cleaning device 1 to drive the pool cleaning device 1 to move in a direction opposite to the direction of the flow of water from the water spray assembly 4. Thus, with reference to the positon shown in FIG. 2, as the water flows out to the left (rearward), the device 1 will be driven to the right (forward). The water spray assembly 4 is also rotatable relative to the housing 2, which will alter the driven direction of the device 1.

As the water spray assembly 4 rotates relative to the housing 2, the direction of the flow of water from the water spray assembly 4 also changes, thereby providing power to the pool cleaning device 1 in other directions. It can therefore be understood that when the pool cleaning device 1 of the present disclosure is used, there is no need to additionally provide the pool cleaning device 1 with a water pump (as described in the prior art), which reduces the production cost of the pool cleaning device 1, and facilitates the use of the pool cleaning device 1 of the present disclosure. Moreover, because no additional water pump is required, there is no need for a water tube connected between a water pump and the pool cleaning device (as described in the prior art), thereby solving the problem of entanglement of the water tube, and further facilitating the use of the pool cleaning device 1 of the present disclosure.

In an embodiment, the pool cleaning device 1 is generally oval-shaped and the pool cleaning device 1 is configured to move forward or backward in a first direction L (i.e., in a direction along a major axis Y of the pool cleaning device 1). It will be appreciated that the housing 2 may also be of other shapes, for example circular or polygonal, etc., which will not be repeated here. For purposes of discussion, the solution of the present disclosure will be shown and described in the case where the housing 2 is generally oval-shaped.

In an embodiment, the output shaft 614 is directly connected to the impeller 41. In other words, the output shaft 614 is not connected to the impeller 41 by any reduction mechanism. This arrangement helps to reduce the noise generated by the pool cleaning device 1 during an operation, thereby improving the user's experience. It will be appreciated that in other embodiments, the output shaft 614 may also be coupled to the impeller 41 through a reduction mechanism (e.g., a gearbox), thereby reducing the rotational speed of the impeller 41 in the case of an excessive rotational speed of the output shaft 614. This arrangement reduces the load on the impeller 41 and extends the life of the impeller 41. It will be appreciated that the output shaft 641 may also be connected to the impeller 41 via intermediate structure without the use of gear reduction.

As also shown in FIG. 2, a filter screen 203 is provided in the housing 2 in the path between the inlet 201 and outlet 202. The filter screen 203 may be configured to filter sand or other debris from the water entering the water flow channel 20, which helps to leave debris drawn into the water flow channel 20 within the housing 2 and prevents such debris from getting stuck between movable components of the pool cleaning device 1 (such as the impeller 41 and the shaft 614) and causing malfunction. In an embodiment, the upper housing 21 and the lower housing 22 may be disassembled to remove the filter screen 203 from the first chamber 206 for cleaning and/or replacement. It will be appreciated that various types and shapes of filters may also be used.

As shown in FIG. 4, the housing 2 is provided with two through holes (i.e., a first through hole 205a and a second through hole 205b). For example, the first through hole 205a and the second through hole 205b are provided on the upper housing 21. As shown in FIGS. 1, 3 and 4, the pool cleaning device 1 also includes a charging base 7. The charging base 7 includes two bases (i.e., a first base 72a and a second base 72b) and two charging posts (i.e., a first charging post 71a and a second charging post 71b). The two bases are respectively provided at the positions of the two through holes (i.e. on the upper housing 21). It will be appreciated that the position of the first base 72a corresponds to the position of the first through hole 205a, and the position of the second base 72b corresponds to the position of the second through hole 205b. The two charging posts respectively extend in a vertical direction H to be arranged on the two bases.

The first charging post 71a is disposed in the first through hole 205a, and the second charging post 71b is disposed in the second through hole 205b. Each charging post includes a conductive rod 711 and an optional sealing layer 714. Each conductive rod 711 is disposed in a corresponding through hole. Optionally, each conductive rod 711 extends in the vertical direction H. The sealing layer 714 is disposed on the conductive rod 711 and covers at least part of the conductive rod 711 to prevent the water from seeping from a gap between the conductive rod 711 and the corresponding through hole to an internal electrical part of the pool cleaning device 1. For example, the sealing layer 714 covers a circumferential side surface of the conductive rod 711, and a top surface 713 of the conductive rod 711 is exposed from the sealing layer 714. After the pool cleaning device 1 is taken out of the water, the conductive rod 711 protrudes upward from the housing 2 in the vertical direction H. If there is water on the conductive rod 711, the water flows downward under gravity and quickly leaves the conductive rod 711, and it is difficult to retain the water on the conductive rod 711 to form water build-up, and thus no water build-up is present on the first base 72a and the second base 72b of the charging base and no corrosion of the conductive rod 711 is caused.

In an embodiment, the conductive rod 711 is made of an inert metal material, for example, but not limited to, stainless steel, titanium, etc. In this way, the conductive rod 711 possesses good rust resistance. In a humid environment, the top surface 713 of the conductive rod 711 is also less prone to the formation of a poorly conductive oxide layer, thereby avoiding an increase in the contact resistance of the charging plug (as described below) with the charging post and/or a decrease in the charging efficiency of the pool cleaning device 1 due to an oxide layer formed on the top surface 713 of the conductive rod 711.

As also shown in FIG. 4, the top surface 713 of the conductive rod 711 is planar. The flat top surface 713 of the conductive rod 711 is accordingly easy to machine and convenient to clean. On the other hand, the flat top surface allows two charging posts to have as large an effective contact area as possible with respective electrode plates (as detailed below) of the charging plug 73, which can accordingly reduce the accumulation of heat at the positions of the charging posts and the electrode plates when the pool cleaning device 1 is being charged by the charging plug 73.

As also shown in FIGS. 3 and 4, the first base 72a and the second base 72b are spaced apart from each other. The first base 72a includes a first inward extension 722a extending from a side wall thereof, and the second base 72b includes a second inward extension 722b extending from a side wall thereof. The first extension 722a and the second extension 722b are disposed toward each other and spaced apart so as to define a slot 723 between the first extension 722a and the second extension 722b. For example, the first extension 722a is spaced apart from the second extension 722b in a second direction W substantially perpendicular to the first direction L (i.e., a direction in which the second direction W is substantially parallel to a minor axis X of the pool cleaning device 1). As shown in FIG. 4, in the vertical direction H, the slot 723 has a smaller size in an upper opening and a larger size in the interior. It will be appreciated that other extension shapes and spacing may be used to create the slot 723.

FIG. 5 illustrates a charging plug 73 sized and configured to mate with the charging base 7. As shown in FIG. 5, the charging plug 73 has a structure that matches the charging base 7. For example, the charging plug 73 includes a partition plate 731 extending in the vertical direction H, a bottom plate 732 connected at a first (bottom) end of the partition plate 731, and a top box 733 connected at a second (top) end of the partition plate 731. Two electrode plates (i.e., a first electrode plate 734a and a second electrode plate 734b) are provided on a downward facing intermediate plate 735 of the top box 733. The first electrode plate 734a and the second electrode plate 734b are spaced apart by the partition plate 731 and face downward.

When the charging plug 73 is connected to the charging base 7, as shown in FIG. 6, the bottom plate 732 is disposed in the slot 723 and the partition plate 731 is disposed in the space between the first extension 722a and the second extension 722b, and the first electrode plate 734a and the second electrode plate 734b are in electrical contact with top surfaces 713 of the two conductive rods 711, respectively. In this way, the charging plug 73 can only be inserted, plugged, and mated with the charging base 7 in the first direction L. Put another way, the charging plug 73 cannot be separated from the charging base 7 in the vertical direction H or shaken relative to the charging base 7 in the second direction W. This secure arrangement ensures that the electrode plates 734a, 734b remain in stable electrical contact with the corresponding conductive rods 711, which in turn helps to improve the charging efficiency of the pool cleaning device 1.

As also shown in FIG. 6, two springs (i.e., a first spring 736a and a second spring 736b) are also provided within the top box 733. The two springs 736a, 736b are respectively configured to abut against the two electrode plates 734a, 734b, so that the two electrode plates 734a, 734b are put into good electrical contact with the top surfaces 713 of the two conductive rods 711, to reduce the contact resistance.

As shown in FIG. 5, the charging plug 73 also has a power connector 737 for connecting an external power source (which may be an AC or DC power source, not shown in the figures). The power connector 737 is electrically connected to the charging plug 73 by a wire 738. In this embodiment, the power connector 737 is a USB connector. It will be appreciated that in other embodiments, the power connector 737 may also have other structure, for example, the power connector 737 may be an AC/DC adaptor.

With reference now to FIGS. 2 and 7, the drive assembly 6 includes a motor housing 60 and a motor assembly 61. The motor housing 60 may include a first part 621 and a second part 622. The first part 621 and the second part 622 are sealingly connected together and define a second chamber 603. The motor assembly 61 is located in the second chamber 603. The second chamber 603 is accordingly sealed from the flow path 20 when the drive assembly is disposed within the first chamber 206 within the housing 2.

The conductive rod 711 extends from the second chamber 603 of the motor housing 60 through the first part 621 to the exterior of the motor housing 60. The conductive rod 711 is sealingly connected to the first part 621 to avoid a failure of the motor assembly 61 caused by water from an external environment entering the second chamber 603 along the conductive rod 711. In an embodiment, the conductive rod 711 is disposed on the first part 621 of the motor housing 60 by an encapsulation structure such that the sealing layer 714 is sealingly connected to the first part 621 of the motor housing 60.

As shown in FIG. 7, the motor assembly 61 includes a motor 611, a battery pack 612, and a PCB (Printed Circuit Board) 613, etc. The conductive rod 711, the motor 611, and the battery pack 612 are electrically connected to the PCB 613, respectively. The battery pack 612 is configured to power the PCB and motor 611, and the conductive rod 711 is configured to charge the battery pack 612. The motor 611 includes output shaft 614. A separate shaft could also be attached to the motor output.

The first part 621 and the second part 622 of the motor housing 60 are detachably connected. In this way, the motor housing 60 can be opened as needed to maintain, repair, or replace the motor 611, the battery pack 612, or the PCB 613, etc.

As also shown in FIG. 7, the motor housing 60 also includes a mounting plate 601. The mounting plate 601 is provided on an inner surface of the first part 621 of the motor housing 60 (i.e., the surface facing the second chamber 603) and extends toward the interior of the second chamber 603. The mounting plate 601 extends circumferentially into a closed shape and defines a mounting space 602 with the first part 621 of the motor housing 60. The PCB 613 is mounted in the mounting space 602. A sealant (not shown in the figures) is provided between the PCB 613 and the first part 621 of the motor housing 60. This sealant protects against and avoids adverse effects of moisture entering the second chamber 603 on the PCB 613, which in turn helps to improve the service life of the pool cleaning device 1.

As shown in FIG. 8, the battery pack 612 includes a battery pack housing 615 and a battery cell 616 within the battery pack housing 615. A sealant 617 is filled between the battery pack housing 615 and the battery cell 616. In this way, the battery cell 616 is isolated from the external environment by the sealant 617 and the battery pack housing 615, which prevents the battery cell 616 from malfunctioning or shortening its life due to the effects of the moisture. In some embodiments, a packaging layer (not shown in the figures) is also provided on the exterior of the battery cell 616, in which case the sealant 617 is filled between the packaging layer and the battery pack housing 615.

With reference to FIG. 9, which includes a partial cross-section, the pool cleaning device 1 further includes two handle assemblies 212. The two handle assemblies 212 are arranged on the upper housing 21 and are arranged on opposite sides of the upper housing 21 in the second direction W. Each handle assembly 212 includes a handle frame 215 and a resilient handle 213. It will be appreciated that in other embodiments, the pool cleaning device 1 may have fewer or more handle assemblies 212.

The following description is based on the handle assembly 212 on the right side in the orientation shown in FIG. 9.

With reference to FIGS. 9 and 10, the handle frame 215 is fixedly connected to the upper housing 21 (e.g., connected to the upper housing 21 by a screw 217) and extends toward the lower housing 22. The resilient handle 213 is connected to the handle frame 215 and is movable relative to the housing 21. The resilient handle 213 includes a boss 214 extending inwardly.

As also shown in FIG. 9, the lower housing 22 has a flange 224 extending outwardly, the flange 224 corresponding to the boss 214.

The upper housing 21 is above the lower housing 22 in the vertical direction H, and the handle 213 extends downward in the vertical direction H. In this way, when the upper housing 21 and the lower housing 22 are assembled together, the upper housing 21 and the lower housing 22 are aligned and the upper housing 21 is pressed down toward the lower housing 22. The outwardly extending flange 224 of the lower housing 22 will push the corresponding boss 214 of the upper housing 21 outward in the second direction W, and accordingly the handle 213 is elastically deformed away from the upper housing 21 in the second direction W. After the boss 214 has passed the corresponding flange 224, the handle 213 will resiliently move back in the second direction W and return toward the upper housing 21 so that the boss 214 engages with the corresponding flange 224, thereby connecting the upper housing 21 with the lower housing 22. This facilitates the assembly of the upper housing 21 and the lower housing 22.

When detachment and separation of the upper housing 21 from the lower housing 22 is desired, the handle 213 may be pulled slightly outward to separate the boss 214 from the corresponding flange 224. Then, the upper housing 21 may be moved upwardly so that the upper housing 21 disengages from the lower housing 22. In this way, individual components disposed within the housing 2 can be maintained and/or replaced as needed. For example, the filter screen 203 can be removed from the housing 2 and cleaned and/or replaced. In the prior art, the upper and lower housings are usually connected by a fit of a snap and a hook. However, the fit of the snap and hook is susceptible to dirt and sand and is hard to separate, which makes it difficult to separate the upper and lower housings. According to the technical solution of the present disclosure, however, a user may separate the upper housing 21 from the lower housing 22 by merely manually slightly pulling the handle 213 outward to separate the boss 214 and the flange 224. The whole operation process is therefore effectively not affected by the dirt and sand, and is convenient for the user to operate.

As shown in FIG. 10, a clearance 210 is provided between the handle 213 and the handle frame 215, the clearance 210 being non-continuous, thus forming two flexible connections 216 between the handle 213 and the handle frame 215. The flexible connection 216 has less strength and stiffness and more elasticity, such that when the handle 213 is subjected to an external force (such as when the handle 213 is pulled by a user's hand or pushed outward by the flange 224), the flexible connection 216 can be resiliently moved away from or toward the upper housing 21. In another embodiments, only one flexible connection 216 may be provided, with the clearance 210 extending away from that connection 216. It will be appreciated that other forms of connections may also be used to connect the handle 213 and the handle frame 215 according to design needs.

In an embodiment, the handle frame 215 is integrally formed with the handle 213 for case of manufacture. In other embodiments, the handle frame 215 may be integrally formed with the upper housing 21, and then the handle 213 may be connected to the handle frame 215.

With reference back to FIG. 1, the pool cleaning device 1 further includes a reversing assembly 3. As shown in FIGS. 1 and 11a, the reversing assembly 3 includes a reversing blade 31. The reversing blade 31 is generally U-shaped and is rotatably connected to the housing 2 at both ends of the U-shape. For example, the reversing blade 31 is configured at each end with a rotating shaft 311, and the housing 2 is provided with a corresponding shaft hole 204, corresponding to the rotating shafts 311. The reversing blade 31 substantially spans the housing 2 in the second direction W and the two rotating shafts 311 are respectively inserted into the respective shaft holes 204, thereby enabling the rotational connection of the reversing blade 31 with the housing 2. In this case, the two rotating shafts 311 define the axis of rotation of the reversing blade 31.

The reversing blade 31 is configured to allow or prevent rotation of the water spray assembly 4 relative to the housing 2, so as to enable the pool cleaning device 1 to switch the direction of movement. For example, when the nozzle 404 of the water spray assembly 4 faces rearward (as shown in FIG. 1 and FIG. 2), the pool cleaning device 1 moves forward and the reversing assembly 3 tilts backward under the resistance of the water. When the pool cleaning device 1 stops moving (e.g., when the pool cleaning device 1 contacts a pool wall of the pool), the reversing blade 31 will rotate from a backward inclined state to a state along the vertical direction H under the buoyancy of the water. A stop component disposed on the reversing blade 31, in this vertical position, no longer abuts against the corresponding component on the circumferential side wall of the water spray housing 403. In this position, the reversing blade 31 allows the water spray assembly 4 to rotate by 180 degrees relative to the housing 2, so that the nozzle 404 of the water spray assembly 4 faces forward (a direction opposite to a water spray direction shown in FIG. 1, i.e. the first direction), and the stop component disposed on the reversing blade 31 will abut against the corresponding component on the circumferential side wall of the water spray housing 403 to prevent the water spray assembly 4 from continuing to rotate. In this way, the water spray assembly 4 sprays water toward the first direction that the device 1 had been traveling (forward), and the pool cleaning device 1 is pushed to move backward (i.e. in a direction opposite to the first direction), and the reversing blade 31 will tilt forward under the resistance of the water as the device travels in the backward direction. The reversing blade 31 is accordingly arranged to reciprocate between being tilted forward and backward in response to continued movement of the device 1 as it repeatedly traverses the pool.

The reversing blade 31 can also be used as a handle for the pool cleaning device 1, thereby eliminating the need to configure the pool cleaning device 1 with an additional handle, which reduces the number of parts of the pool cleaning device 1, and thus reduces the cost of the pool cleaning device 1.

As also shown in FIGS. 11a and 11b, the reversing assembly 3 also optionally includes two sliding plates 32 and two elastic members 33 which are slidably mounted at two ends of the reversing blade 31 respectively, each elastic member 33 being located between the corresponding sliding plate 32 and the reversing blade 31. The sliding plate 32 is able to rotate with the reversing blade 31 and slide relative to the reversing blade 31 toward or away from the center of rotation of the reversing blade 31 (i.e. the rotating shaft 311), and to place the corresponding clastic member 33 in a released state or in a compressed state.

Specifically, as shown in FIG. 12a, the sliding plate 32 is constructed with a baffle plate 324. As shown in FIGS. 12b and 12c, one end of the reversing blade 31 is configured with an opening 312 extending toward the rotating shaft 311, the opening 312 having a first end wall 313 away from the rotating shaft 311 and a second end wall 314 close to the rotating shaft. As shown in FIGS. 11a, 11b, and 12c, the sliding plate 32 is mounted in the opening 312, and the baffle plate 324 is disposed facing the first end wall 313 and the second end wall 314. The clastic member 33 is disposed in the opening 312 and abuts against the baffle plate 324 and the first end wall 313, respectively, at two ends (i.e. the elastic member 33 abuts against the corresponding portion of reversing blade 31 and the sliding plate 32, respectively, at two ends). In this embodiment, the clastic member 33 is a coil spring. Of course, in other embodiments, other types of elastic members (such as a torsion spring) may also be used, which will not be further described.

As also shown in FIGS. 1, 11a, and 11b, at least two limiting projections 243 are provided on the housing 2, and the two limiting projections 243 are opposite each other in the second direction W. Each limiting projection 243 is in a rotational path of the respective end of the reversing blade 31, and each sliding plate 32 is adapted to contact the respective limiting projection 243. As shown in FIG. 11a, optionally, each limiting projection 243 includes a first wall 241 and a second wall 242, the second wall 242 extending upward in the vertical direction H and offset in the first direction L from the rotating shaft 311 of the respective reversing blade 31, and the first wall 241 extending obliquely downward from an upper end of the second wall 242 toward the rotating shaft 311 of the reversing blade 31. For example, the first wall 241 extends obliquely downward from the upper end of the second wall 242 and is parallel to a certain radial direction of the rotational path of the reversing blade 31. In other embodiments, the first wall 241 may also extend obliquely downward from the middle of the second wall 242. Optionally, in other embodiments, the limiting projection 243 may be formed as a solid structure for cooperative use with a corresponding sliding plate.

As shown in FIG. 11a, when the sliding plate 32 abuts against the second wall 242, the reversing blade 31 is at a first angle α1 to the vertical direction H. At this position, the elastic member 33 is compressed between the baffle plate 324 and the first end wall 313. In this way, under a thrust force of the clastic member 33, the sliding plate 32 closely abuts against the second wall 242 to prevent rotation of the reversing blade 31 relative to the housing 2. As shown in FIG. 11b, after the reversing blade 31 is pushed to rotate such that the sliding plate 32 rotates over the second wall 242, the elastic member 33 is released and pushes the sliding plate 32 to move toward the rotating shaft 311. When the reversing blade 31 (or the sliding plate 32) is substantially parallel to the obliquely arranged first wall 241, the reversing blade 31 is at a second angle α2 with respect to the vertical direction H, the first angle α1 being greater than the second angle α2. According to this structure, when the sliding plate 32 abuts against the second wall 242, the reversing blade 31 is lower in height; and when the sliding plate 32 rotates over the second wall 242, the reversing blade 31 is higher in height. Therefore, after the pool cleaning device is manufactured by a producer, in order to reduce the specification of a packaging box of the pool cleaning device, the reversing blade 31 can rotate relative to the housing 2 such that the sliding plate 32 abuts against the second wall 242 (as shown in FIG. 11a), to lower the height of the reversing blade 31, which can reduce the space occupied by the pool cleaning device 1 in the packaging box, so as to facilitate the storage of the pool cleaning device 1. When a user first uses the pool cleaning device, it is only necessary to slightly lift the reversing blade 31 to enable the sliding plate 32 to rotate over the second wall 242 (as shown in FIG. 11b), so that the pool cleaning device is in a normal working state, thereby preventing the pool cleaning device from being unable to effectively clean the bottom of the pool due to a stop structure on the reversing blade 31 not cooperating with the corresponding structure on the water spray housing. With the reversing blade 31 in the normal working state, the reversing blade 31 can effectively reciprocate between the forward and backward positions. The reversing blade 31 may be placed back in the lower height position for storage when not in use.

It should be noted that when the sliding plate 32 abuts against the vertically aligned second wall 242 (the lower height position), the reversing blade 31 is prevented from freely rotating relative to the housing 2 in its direction of rotation due to a friction between the sliding plate 32 and the second wall 242, and therefore the pool cleaning device 1 cannot be automatically reversed in the pool. Thus, when the user first uses the pool cleaning device 1, the user first needs to push or lift the reversing blade 31 upward toward the vertical direction H in rotation with respect to the housing 2 until the sliding plate 32 rotates over the second wall 242. At this lifted position, when the pool cleaning device is used, the reversing blade 31 can oscillate and reciprocate between the obliquely arranged first walls 241 of the two oppositely arranged limiting projections 243, to accordingly cooperate with the corresponding structures on the water spray assembly 4 to provide the automatic reversing of the pool cleaning device within the pool. Because the first wall 241 extends obliquely downward from the upper end of the second wall 242 toward the rotating shaft 311 of the reversing blade 31, the first wall 241 does not impede the rotation of the reversing blade 31 under a combined effect of the buoyancy and thrust force of the water. In this way, when the pool cleaning device 1 moves in the water, the reversing blade 31 can rotate relative to the housing 2 under the combined effect of the buoyancy and thrust force of the water, and the pool cleaning device 1 can automatically reverse in the water.

Also according to the reversing assembly 3 of this structure, the elastic member 33 is protected by the opening 312, which makes the pool cleaning device 1 less susceptible to a failure. It should be noted that after the sliding plate 32 rotates over the second wall 242, the baffle plate 324 abuts against the second end wall 314 of the opening 312 (as shown in FIG. 11b), which helps to prevent a sliding distance of the sliding plate 32 relative to the reversing blade 31 from being too large to fall off the reversing blade 31.

In an alternative embodiment, the sliding plate 32 may also be provided at only one end of the U-shape of reversing blade 13. In this way, it is only necessary to provide the limiting projection on the corresponding side of the housing 2 in the second direction W.

With reference again to FIG. 1, two cover plates 24 are provided on the housing 2 (or the upper housing 21). The two cover plates 24 are arranged on opposite sides of the housing 2 in the second direction W and define, together with the upper housing 21, the shaft holes 204, respectively. Each cover plate 24 has a limiting projection 243 as described above at both ends in the first direction L. In this embodiment, the two limiting projections 243 are integrally formed with the respective cover plates 24 for ease of manufacture. It will be appreciated that in other embodiments, the two limiting projections 243 and the corresponding cover plates 24 may also be separately manufactured and assembled.

As shown in FIG. 12b, two guide rails 315 are provided on the reversing blade 31, the two guide rails 315 being on two sides of the opening 312 in a direction perpendicular to a sliding direction A of the sliding plate 32. As shown in FIG. 12a, two guide grooves 325 are correspondingly configured on the sliding plate 32, and notches of the two guide grooves 325 face each other. The baffle plate 324 is located between the two guide grooves 325. In this way, the two guide rails 315 are slidably engaged into the two guide grooves 325, respectively, and the sliding plate 32 rides over the opening 312 and is slidable relative to the reversing blade 31. In a direction perpendicular to the sliding direction A of the sliding plate 32, the two guide rails 315 and the two guide grooves 325 act as constraints for the sliding plate 32 to prevent the sliding plate 32 from falling off the reversing blade 31. It will be appreciated that the guide rails 315 may also be provided on the sliding plate 32, and accordingly the guide grooves 325 would be disposed on the reversing blade 31. It will be appreciated that other groove and/or slot arrangements can also be used.

Turning now to FIGS. 1 and 13a, the pool cleaning device 1 further includes a wheel assembly 5 disposed on the lower housing 22. As shown in FIG. 13a, the wheel assembly 5 includes a front wheel 51 and two rear wheels 52, so that the pool cleaning device 1 can move smoothly at the bottom of the pool. The front wheel 51 is disposed generally on the major axis Y of the pool cleaning device 1, and the two rear wheels 52 are symmetrically arranged with respect to the major axis Y.

Optionally, as shown in FIG. 13b, the lower housing 22 is provided with a wheel chamber 222 for mounting the front wheel 51. For example, the wheel chamber 222 extends generally in the first direction L. The wheel chamber 222 is provided with a first constraint structure 25 and a second constraint structure 26 on both sides in the second direction W. The setting of the constraint structures can be used to control the movement pattern of the device 1, as discussed further below.

The front wheel 51 includes a wheel body 511 and an axle 512. The wheel body 511 is disposed within the wheel chamber 222 and is spaced apart from two side walls 225 of the wheel chamber 222. The axle 512 spans the wheel chamber 222 in the second direction W, a first end 521 of the axle 512 is rotatably connected to the first constraint structure 25, and a second end 522 of the axle 512 is adapted to oscillate in the first direction L within a constraint range of the second constraint structure 26. In this way, when the pool cleaning device 1 is used, the oscillation of the second end 522 of the axle 512 can be controlled according to the actual cleaning situation, so as to properly steer the wheel body 511, thereby changing a movement trajectory of the pool cleaning device 1.

As also shown in FIG. 13b, the first constraint structure 25 optionally has a first stop post 251 and a second stop post 252. The first stop post 251 has an arc-shaped first circumferential side wall, the second stop post 252 has an arc-shaped second circumferential side wall, and the first stop post 251 and the second stop post 252 are spaced apart in the first direction L. In an embodiment, the first stop post 251 is a cylinder and the second stop post 252 is also a cylinder. The first end 521 of the axle 512 is disposed within the clearance between the first stop post 251 and the second stop post 252. In this way, the first end 521 of the axle 512 is in rotatable contact with the first stop post 251 and the second stop post 252 so that the second end 522 of the axle 512 can oscillate in the first direction L, with the first end 521 remaining in approximately the same position and providing a pivot.

As also shown in FIG. 13b, the second constraint structure 26 has a limiting plate 261 and an adjustment switch 262. The limiting plate 261 extends generally in the second direction W. The adjustment switch 262 includes a stop lever 263 rotatably disposed on the lower housing 22. The stop lever 263 is disposed across from, opposite, and spaced apart from the limiting plate 261 in the first direction L. The second end 522 of the axle 512 is disposed between the stop lever 263 and the limiting plate 261, and the stop lever 263 and the limiting plate 261 will define a range of oscillation of the second end 522 of the axle 512. According to this structure, the distance between the stop lever 263 and the limiting plate 261 can be adjusted by turning the stop lever 263, thereby changing the range of oscillation of the second end 522 of the axle 512, and thereby causing the wheel body 511 to be properly steered.

As also shown in FIG. 13b, the adjustment switch 262 also optionally comprises a shift lever 264 connected to the stop lever 263, and an angle of greater than 90 degrees and less than or equal to 180 degrees is formed between the stop lever 263 and the shift lever 264. The pool cleaning device 1 further includes a wheel chamber cover 27 (as shown in FIGS. 1 and 15) disposed on the lower housing 22. The wheel chamber cover 27 covers the wheel chamber 222 so that the axle 512 of the front wheel 51 is between the lower housing 22 and the wheel chamber cover 27. FIG. 15 provides a view looking down on the wheel, such that the inside of the wheel cover 27 is visible. FIGS. 13a and 13b provide views looking up at the bottom of the device 1. Thus, the stop lever 263 appears on the right of FIGS. 13a and 13b, but on the left of FIG. 15.

With further reference to FIG. 15, the wheel chamber cover 27 is provided with an arc-shaped sliding groove 273. The sliding groove 273 has a first limiting end 271 and a second limiting end 272. The end of the shift lever 264 that is away from the stop lever 263 is disposed in the sliding groove 273 and is reciprocally slidable between the first limiting end 271 and the second limiting end 272.

The user may accordingly manually push either the stop lever 263 or the shift lever 264 so that the end of the shift lever 264 is located at the first limiting end 271 of the sliding groove 273, thus forming a first range of oscillation between the stop lever 263 and the limiting plate 261 at the second end 522 of the axle 512 (the state of the lever 263 shown in FIG. 15). In this state, when the second end 522 of the axle 512 abuts against the stop lever 263 (i.e., a first state of the front wheel 51), the axle 512 is tilted backward and encloses an angle in the range of 0° to 10° with the second direction W. Optionally, the axle 512 is tilted backward and encloses an angle of approximately 5°, 6°, 7°, 8°, 9° or 10° with the second direction W. In one embodiment, the axle 512 is tilted backward and encloses an angle of 8° with the second direction W, and the wheel body 511 is deflected to the left with respect to the first direction L (as shown in FIG. 15). When the second end 522 of the axle 512 abuts against the limiting plate 261 (i.e., a second state of the front wheel 51, shown in FIG. 16), the axle 512 is tilted forward and encloses an angle in the range of 0° to 10° with the second direction W. Optionally, the axle 512 is tilted forward and encloses an angle of approximately 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, 5.5°, 6°, 6.5°, 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, or 10° with the second direction W. In one embodiment, the axle 512 is tilted forward and encloses an angle of 3.5° with the second direction W, and the wheel body 511 is deflected to the right with respect to the first direction L (as shown in FIG. 16).

To adjust the oscillating range, the user may also push either the stop lever 263 or the shift lever 264 so that the end of the shift lever 264 is located at the second limiting end 272 of the sliding groove 273, which forms a second range of oscillation between the stop lever 263 and the limiting plate 261 at the second end 522 of the axle 512 (as shown in FIG. 19). In this state, when the second end 522 of the axle 512 abuts against the stop lever 263 (i.e., a third state of the front wheel 51), the axle 512 encloses an angle in the range of 0° to 2° with the second direction W. Optionally, the axle 512 encloses an angle of approximately 0°, 0.5°, 0.8°, 1°, 1.5°, or 2° with the second direction W. In one embodiment, the axle 512 encloses an angle of 0° with the second direction W (the state of the lever 263 shown in FIG. 19), and the wheel body 511 is not deflected or substantially not deflected with respect to the first direction L. When the second end 522 of the axle 512 abuts against the limiting plate 261 (i.e., a fourth state of the front wheel 51), the axle 512 is tilted forward and encloses an angle in the range of 0° to 10° with the second direction W. Optionally, the axle 512 is tilted forward and encloses an angle of approximately 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, 5.5°, 6°, 6.5°, 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, or 10° with the second direction W. In one embodiment, the axle 512 is tilted forward and encloses an angle of 3.5° with the second direction W, and the wheel body 511 is deflected to the right with respect to the first direction L (as shown in FIG. 20). Thus, the second end 522 of the axle 512 has a first range of oscillation (lever state shown in FIG. 15) greater than a second range of oscillation (lever state shown in FIG. 19).

With reference back to FIG. 14, when the pool cleaner 1 is used in a rectangular pool 8, the shift lever 264 can abut against the first limiting end 271 of the sliding groove 273 so that the second end 522 of the axle 512 can oscillate within the first range of oscillation (lever state shown in FIG. 15). When the pool cleaner 1 is in a first position 81 within the rectangular pool 8, the front wheel 51 is in the first state, i.e. the axle 512 is tilted backward and encloses an angle of approximately 8° with the second direction W, and the wheel body 511 is deflected to the left with respect to the first direction L (as shown in FIG. 15). The water spray assembly 4 sprays water in a direction opposite to the first direction L to provide power for a forward movement of the pool cleaner 1. In this way, the pool cleaner 1 moves forward to the left within the rectangular pool 8 to a second position 82 within the rectangular pool 8 and is blocked by a pool wall 84 of the rectangular pool 8. Next, the pool cleaner 1 stops its movement due to the blockage of the pool wall 84, and the reversing blade 31 is now no longer inclined by the impact of the water flow. Thus, the reversing blade 31 of the pool cleaner floats due to its own buoyancy and then oscillates to a position substantially perpendicular to the housing 2, at which point the stop structure on the reversing blade 31 disengages from the corresponding structure on the circumferential side wall of the water spray housing 403, and the water spray assembly 4 rotates to spray the water in the direction of the first direction L. At this time, the pool cleaner 1 is pushed to move away from the second position 82, the reversing blade again 31 oscillates to a tilted position due to the impact of the water flow, and the stop structure on the reversing blade 31 will cooperate with the corresponding structural stop on the circumferential side wall of the water spray housing 403 to position the water spray assembly 4 to spray the water in the direction of the first direction L. The pool cleaner 1 is moved slightly backward from the second position 82, and the front wheel 51 shifts to the second state under the frictional resistance of the pool bottom, that is, the axle 512 is tilted forward and encloses an angle of approximately 3.5° with the second direction W, and the wheel body 511 is deflected to the right with respect to the first direction L (see FIG. 16). In this way, the pool cleaner 1 moves to the rear right in the rectangular pool 8 to a third position 83 within the rectangular pool 8. The pool cleaner 1 then repeats the above actions in the rectangular pool 8 and finishes cleaning the bottom of the rectangular pool 8. FIG. 17 schematically shows a movement trajectory 85 of the pool cleaning device 1 within the rectangular pool 8. As can be seen from FIG. 17, the movement trajectory 85 of the pool cleaning device 1 substantially covers the bottom of the rectangular pool 8, achieving efficient cleaning of the rectangular pool 8.

As shown in FIG. 18, when the pool cleaner 1 is used in a circular pool 9, the shift lever 264 can be adjusted to abut against the second limiting end 272 of the sliding groove 273 so that the second end 522 of the axle 512 can oscillate within the second range of oscillation. When the pool cleaner 1 is in a first position 91 within the circular pool 9, the front wheel 51 is in the third state, i.e. the axle 512 encloses an angle of approximately 0° with the second direction W (FIG. 19). That is, the wheel body 511 is not deflected or substantially not deflected in the first direction L (as shown in FIG. 19). The water spray assembly 4 sprays water in a direction opposite to the first direction L to provide power for a forward movement of the pool cleaner. In this way, the pool cleaner 1 moves forward within the circular pool 9 to a second position 92 within the circular pool 9 and is blocked by a pool wall 94 of the circular pool 9. Next, the pool cleaner 1 stops its movement due to the blockage of the pool wall 94, and the reversing blade 31 is now no longer inclined by the impact of the water flow. Thus, the reversing blade 31 of the pool cleaner floats due to its own buoyancy and then oscillates to a position substantially perpendicular to the housing 2, at which point the stop structure on the reversing blade 31 disengages from the corresponding structure on the circumferential side wall of the water spray housing 403, and the water spray assembly 4 rotates to spray the water in the direction of the first direction L. At this time, the pool cleaner 1 is pushed to move from the second position 92, the reversing blade 31 again oscillates to a tilted position due to the impact of the water flow, and the stop structure on the reversing blade 31 will cooperate with the corresponding structural stop on the circumferential side wall of the water spray housing 403 to position the water spray assembly 4 to spray the water in the direction of the first direction L. The pool cleaner 1 is moved slightly backward from the second position 92, and the front wheel 51 shifts to the fourth state under the frictional resistance of the pool bottom, that is, the axle 512 is tilted forward and encloses an angle of approximately 3.5° with the second direction W, and the wheel body 511 is deflected to the right with respect to the first direction L (as shown in FIG. 20). In this way, the pool cleaner 1 moves to the rear right in the circular pool 9 to a third position 93 within the circular pool 9. The pool cleaner 1 then repeats the above actions in the circular pool 9 and finishes cleaning the bottom of the circular pool 9. FIG. 21 schematically shows a movement trajectory 95 of the pool cleaning device 1 within the circular pool 9. As can be seen from FIG. 21, the movement trajectory 95 of the pool cleaning device 1 substantially covers the bottom of the circular pool 9, achieving efficient cleaning of the circular pool 9.

The instructions for using a pool cleaner 1 are described below on the basis of a further embodiment.

First, a power switch of the pool cleaner 1 is turned on and a first color (e.g., green) indicator light is on and flashing. At this point, the pool cleaner 1 is in a standby state. Next, the pool cleaner 1 in the standby state is put into a pool to be cleaned. A water level sensor of the pool cleaner 1 is switched on, the first color indicator light is solid, and after 5 seconds a motor starts to work. During operation, the motor is suspended for 10 seconds every 3 minutes. During the pause, the first color indicator light is solid. When it is necessary to stop using the pool cleaner 1, the pool cleaner 1 is taken out of a water surface and the power switch of the pool cleaning device is turned off to stop the pool cleaner 1.

When a supply voltage of a battery bank is lower than 6.5 V, a second color (e.g., red) indicator light is on and flashing. After 2 to 5 minutes of flashing, the second color indicator light goes out and the pool cleaner 1 stops working.

In the process of charging the pool cleaner 1, the second color indicator light is on and flashing. When the pool cleaner 1 is fully charged, the first color indicator light is solid.

A charge protection voltage for the pool cleaner 1 is 8.4 V. A charging power supply is a DC power supply provided by a USB interface, with a charging voltage of 5 V and a charging current of 1 A to 2 A. Whether the power switch of the pool cleaner 1 is turned on does not affect charging.

The foregoing descriptions represent illustrative embodiments of the present disclosure and are not intended to limit the present disclosure. A person skilled in the art may make various changes and variations to the present disclosure. Any modifications, equivalent replacements, and improvements made without departing from the spirit and principle of the present disclosure shall fall within the scope of the claims of the present disclosure.

LIST OF REFERENCE SIGNS