POWER SCRUBBER

Description

FIELD

The subject matter described herein relates to power tools, and more particularly relates to a power scrubber.

BACKGROUND

Driven by the advancement of industrialization, a growing variety of power tools have emerged to implement various tasks, e.g., a power scrubber. An existing power scrubber generally comprises a housing, an electric motor, and a brush head, where the electric motor actuates the brush head to spin, so that the spinning brush head scrubs a to-be-cleaned object or surface. The power scrubber significantly facilitates a user's cleaning work, for example, washing a car, or cleaning a kitchen item, a floor surface, or a wall surface. An existing power scrubber is usually provided with only one scrubbing side, i.e., its lower surface where bristles are set, a consequence of which is that a user has to readjust the orientation of the power scrubber in the course of floor cleaning in order to clean a wall surface around a corner, which hampers the cleaning work.

SUMMARY

To overcome the above and other drawbacks in conventional technologies, the present disclosure provides a power scrubber; by setting third bristle bundles on an outer peripheral surface of an outer disc body, an additional scrubbing side is formed for a disc brush, which enhances scrubbing efficiency and scrubbing effect of the disc brush.

A power scrubber described herein comprises: a housing, an electric motor, a drive assembly, and a disc brush, the electric motor and the drive assembly being disposed inside the housing, the disc brush being disposed outside the housing, the electric motor driving, via the drive assembly, the disc brush to spin, the disc brush comprising an inner disc body and an outer disc body, the outer disc body being disposed surrounding an outer periphery of the inner disc body, a first bristle bundle being set on a lower surface of the inner disc body, a second bristle bundle being set on a lower surface of the outer disc body, wherein a plurality of third bristle bundles distributed circumferentially at even intervals are set on an outer peripheral surface of the outer disc body, the third bristle bundles extending outward from the outer peripheral surface of the outer disc body in a direction away from the center of the disc brush.

In some implementations, the third bristle bundles are arranged in circles along the outer peripheral surface of the outer disc body.

In some implementations, the third bristle bundles extend outward along radial directions of the outer disc body.

In some implementations, the third bristle bundles have a length L ranging from 10 mm to 40 mm.

In some implementations, the first bristle bundle has a hardness different from that of the second bristle bundle.

In some implementations, the electric motor actuates, via the drive assembly, the inner disc body and the outer disc body to rotate in opposite directions; and the drive assembly comprises an inner shaft and an outer shaft, the outer shaft being sleeved outside the inner shaft, the outer disc body being connected to a lower end of the outer shaft, the inner disc body being connected to a lower end of the inner shaft.

In some implementations, a latch configured to lock the outer shaft and a spring acting on the latch are provided on the housing, the latch compressed to lock the outer shaft causes the spring elastically deformed, and the spring recovering from deformation drives the released latch to be disengaged from the outer shaft.

In some implementations, a plurality of slots for inserting the latch distributed circumferentially at intervals are set on an outer peripheral surface of the outer shaft.

In some implementations, the lower end of the outer shaft projects out of the housing and is set with a male thread, a connecting hole extending axially is provided in the center of the outer disc body, a female thread is set on a hole wall of the connecting hole, the outer disc body is connected to the lower end of the outer shaft via fitting between the female thread and the male thread; and/or, the lower end of the inner shaft projects out of the housing and is provided with a snap connector, a fit-in hole is provided in the center of the inner disc body, and the inner disc body is connected to the lower end of the inner shaft via fitting between the fit-in hole and the snap connector.

In some implementations, a plurality of finger grooves inwardly recessed towards the center of the inner disc body are set at intervals on the outer peripheral surface of the inner disc body; and/or, the outer disc body is provided with a recessed cavity configured to receive the inner disc body, the recessed cavity being inwardly recessed upward from the lower surface of the inner disc body.

With the technical solutions noted supra, the present disclosure offers the following advantages:

1. The power scrubber described herein has a disc brush structure including an inner disc body and an outer disc body, and the electric motor may drive, via the drive assembly, the two disc bodies to rotate in a same direction or in opposite directions. By setting the first bristle bundles on the lower surface of the inner disc body and setting the second bristle bundles on the lower surface of the outer disc body, the first bristle bundles and the second bristle bundles may be combined to form one scrubbing side of the disc brush. By setting the third bristle bundles on the outer peripheral surface of the outer disc body, another scrubbing side is formed on the outer peripheral surface of the outer disc body. With rational setup of the bristle bundles, the disc brush is contributed two scrubbing sides; the two scrubbing sides may be applied alternatively or simultaneously for scrubbing. Especially when the power scrubber is applied to clean a floor surface, the first bristle bundles and the second bristle bundles may serve to scrub the floor surface, while the third bristle bundles may serve to scrub a wall surface around a wall corner. With this rational improvement of the scrubber structure, the dirt scrubbing efficiency of the tool is enhanced and user experience is improved.

2. By setting the third bristle bundles in circles along the outer peripheral surface of the outer disc body, the third bristle bundles are distributed circumferentially over the entire outer peripheral surface of the outer disc body; in this way, the third bristle bundles can effectively scrub a to-be-cleaned object or surface irrespective of how the disc brush spins.

3. The third bristle bundles extend outward along the radial directions of the disc brush; by rationally setting the extending directions of the third bristle bundles, the scrubbing force of the third bristle bundles against a to-be-cleaned object or surface is enhanced, which improves the cleaning effect.

4. By rationally setting the length L of the third bristle bundles, the scrubbing force and service life of the third bristle bundles are both ensured. If the third bristle bundles had a length less than 10 mm, the third bristle bundles would have a shorter service life due to abrasion. If the third bristle bundles had a length greater than 40 mm, the tips of the third bristle bundles are easily deformed under stress, which cannot ensure the scrubbing force of the third bristle bundles against the to-be-cleaned object or surface and thusly cannot guarantee the cleaning effect.

5. By setting different hardnesses for the first bristle bundles and the second bristle bundles, the lower surface of the disc brush features a bristle setup that is harder inside and softer outside or a bristle setup that is softer inside and harder outside, whereby the first bristle bundles and the second bristle bundles impose different scrubbing forces against the dirt; the harder bristles may serve to scrub more stubborn dirt, which enhances scrubbing effect of the power scrubber.

6. The drive assembly comprises an inner shaft and an outer shaft sleeved outside the inner shaft; the outer disc body being connected to the lower end of the outer shaft, the inner disc body being connected to the lower end of the inner shaft; the electric motor drives, via the drive assembly, the two disc bodies to rotate in opposite directions; opposite rotation between the inner disc body and the outer disc body may offset a movement tendency of the spinning disc brush, thereby reducing the force needed for the user to hold the tool, which improves user experience.

7. A latch and a spring are arranged on the housing; to remove the outer disc body, the user may press down the latch, causing the latch to abut against the outer shaft to block the latter from rotation, which facilitates the user's removal operation. When the latch abuts against the outer shaft, the spring is deformed under stress; when the latch is released, the spring recovering from deformation can drive the latch to automatically release the outer shaft.

8. A plurality of slots distributed circumferentially at intervals are set on the outer peripheral surface of the outer shaft, so that the latch abutting against the outer shaft can be inserted in a corresponding slot; fitting between the latch and the slot retains the outer shaft circumferentially; the abutment between the latch and the outer shaft enhances the effect of blocking the outer shaft from rotating in a case of removing the outer disc body.

9. A male thread is set at the lower end of the outer shaft, a connecting hole with a female thread is provided in the center of the outer disc body, and the outer disc body is removably connected to the lower end of the outer shaft via thread-fitting, which contributes the outer disc body a simple setup structure and thusly facilitates the user to remove and replace the outer disc body. Additionally, the connecting hole may avoid the connection between the inner disc body and the inner shaft, which can facilitate connecting the inner disc body to the inner shaft.

A snap connector is provided at the lower end of the inner shaft, and a fit-in hole is provided in the center of the inner disc body; the inner disc body is removably connected to the lower end of the inner shaft via fitting between the fit-in hole and the snap connector; the simple setup structure of the inner disc body facilitates the user to remove and replace the inner disc body.

10. A plurality of finger grooves distributed at intervals are set on the outer peripheral surface of the inner disc body, the finger grooves being recessed inwardly towards the center of the inner disc body; the finger grooves allow for the user to hold the inner disc body firmly, so that the user can easily remove the inner disc body in a case that the outer disc body has been connected to the outer shaft.

The outer disc body is provided with a recessed cavity recessed inwardly upward from its lower surface; when the outer disc body is connected to the outer shaft and the inner disc body is connected to the inner shaft, the inner disc body can be received in the recessed cavity, so that the lower surface of the inner disc body can be substantially flush with the lower surface of the outer disc body, in which case the first bristle bundles on the inner disc body and the second bristle bundles on the outer disc body can be flush with each other; this ensures that the first bristle bundles and the second bristle bundles can effectively scrub a to-be-cleaned object or surface when the disc brush is spinning.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall schematic diagram of a power scrubber according to a first implementation;

FIG. 2 is a structural schematic diagram of the power scrubber according to the first implementation, covering an electric motor, a speed reducer, a drive assembly, and a disc brush;

FIG. 3 is a structural diagram of an inner disc body of the power scrubber according to the first implementation;

FIG. 4 is a structural diagram of the inner disc body of the power scrubber without setting first bristle bundles according to the first implementation;

FIG. 5 is an alternative structural diagram of the inner disc body of the power scrubber without setting first bristle bundles according to the first implementation;

FIG. 6 is a structural diagram of an outer disc body of the power scrubber according to the first implementation;

FIG. 7 is a structural diagram of the outer disc body of the power scrubber without setting second bristle bundles according to the first implementation;

FIG. 8 is a structural diagram of the power scrubber according to the first implementation, covering the electric motor, the speed reducer, and the drive assembly;

FIG. 9 is an exploded view of the power scrubber according to the first implementation, covering the electric motor, the speed reducer, and the drive assembly;

FIG. 10 is a structural diagram of an inner shaft of the power scrubber according to the first implementation;

FIG. 11 is a structural diagram of the power scrubber according to the first implementation, covering an outer shaft, a latch, and a spring.

In the drawings: 100—housing; 110—main housing; 120—bottom housing;

• • 200—electric motor;
  • 300-drive assembly; 310—inner shaft; 311—gear section; 312—snap connector; 313—snap-fitting block; 320—outer shaft; 321—male thread; 322—slot; 330—coupling sleeve; 340—first bearing set; 350—second bearing set; 360—rack; 361—outer ring gear; 370—planetary gear; 371—upper toothed portion; 372—lower toothed portion; 381—upper planetary carrier; 382-lower planetary carrier; 390-supporting shaft;
  • 400—disc brush; 410—inner disc body; 411—first insertion hole; 412—fit-in hole; 413—turnbuckle; 414—finger groove; 420—outer disc body; 421—recessed cavity; 422—second insertion hole; 423—third insertion hole; 424—connecting hole; 425—female thread; 426—water discharge channel;
  • 510—first bristle bundle; 520—second bristle bundle; 530—third bristle bundle;
  • 600—speed reducer; 610—output shaft;
  • 710—latch; 720—spring.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, the present disclosure will be further explained through example implementations with reference to the accompanying drawings. It would be understood that the orientational or positional relationships indicated by the terms “upper,” “lower,” “left,” “right,” “longitudinal,” “transverse,” “inner,” “outer,” “vertical,” “horizontal,” “top,” and “bottom,” etc. are orientational and positional relationships based on the drawings, which are intended only for facilitating description of the disclosure and simplifying relevant illustrations, not for indicating or implying that the devices or elements compulsorily possess those specific orientations and are compulsorily configured and operated with those specific orientations; therefore, such terms should not be construed as limitations to the disclosure.

First Implementation

FIGS. 1-11 illustrate a power scrubber according to a first implementation of the disclosure, comprising a housing 100, an electric motor 200, a drive assembly 300, and a disc brush 400, the electric motor 200 and the drive assembly 300 being disposed inside the housing 100, the disc brush 400 being disposed outside the housing 100, the electric motor 200 actuating, via the drive assembly 300, the disc brush 400 to spin. The disc brush 400 comprises an inner disc body 410 and an outer disc body 420, the outer disc body 420 being disposed surrounding an outer periphery of the inner disc body 410. A first bristle bundle 510 is set on a lower surface of the inner disc body 410. A second bristle bundle 520 is set on a lower surface of the outer disc body 420. A plurality of third bristle bundles 530 circumferentially distributed at even intervals are set on an outer peripheral surface of the outer disc body 420, the third bristle bundles 530 extending outward from an outer peripheral surface of the outer disc body 420 in a direction away from the center of the disc brush 400.

By setting the first bristle bundles 510 on the lower surface of the inner disc body 410 and setting the second bristle bundles 520 on the lower surface of the outer disc body 420, the first bristle bundles 510 and the second bristle bundles 520 may be combined to form one scrubbing side of the disc brush 400. By setting the third bristle bundles 530 on the outer peripheral surface of the outer disc body 420, another scrubbing side is formed on the outer peripheral surface of the outer disc body 420. With rational setup of the bristle bundles, the disc brush 400 is contributed two scrubbing sides; the two scrubbing sides may be applied alternatively or simultaneously for scrubbing. Especially when the power scrubber is applied to clean a floor surface, the first bristle bundles 510 and the second bristle bundles 520 may serve to scrub the floor surface, while the third bristle bundles 530 may serve to scrub a wall surface around a wall corner. With this rational improvement of the scrubber structure, the dirt scrubbing efficiency of the tool is enhanced and user experience is improved.

Referring to FIGS. 6 and 7, in this implementation, a recessed cavity 421 recessed inwardly upward from the lower surface is provided in the center of the outer disc body 420, the recessed cavity 421 being adapted to the inner disc body 410. When the inner disc body 410 and the outer disc body 420 are combined to form the disc brush 400, the inner disc body 410 is received in the recessed cavity 421. The lower surface of the inner disc body 410 is substantially of a round shape, and the lower surface of the outer disc body 420 is substantially of a ring shape; moreover, the lower surface of the inner disc body 410 is substantially flush with the lower surface of the outer disc body 420.

Referring to FIGS. 3 and 4, a plurality of first insertion holes 411 for setting the first bristle bundles 510 are distributed at even intervals on the lower surface of the inner disc body 410, upper ends of the first bristle bundles 510 being fixedly inserted in the first insertion holes 411, the first bristle bundles 510 extending a certain distance downward from the lower surface of the inner disc body 410. As an alternative solution of this implementation, the first bristle bundles 510 may extend vertically downward from the lower surface of the inner disc body 410 or extend inclinedly downward from the lower surface of the inner disc body 410.

Referring to FIG. 7, a plurality of second insertion holes 422 for setting the second bristle bundles 520 are distributed at even intervals on the lower surface of the outer disc body 420, upper ends of the second bristle bundles 520 being fixedly inserted in the second insertion holes 422. The second bristle bundles 520 extend inclinedly downward from the lower surface of the outer disc body 420 so that the second bristle bundles 520 are disposed inclinedly outward relative to the central axis of the outer disc body 420. In this implementation, the second bristle bundles 520 are arranged into a plurality of circles from the inside to the outside, the outward inclining angles of the second bristle bundles 520 relative to the central axis of the outer disc body 420 being enlarged gradually from the inside to the outside. As an alternative solution of this implementation, the second bristle bundle 520 may also extend vertically downward from the lower surface of the outer disc body 420.

Referring to FIG. 7, a plurality of third insertion holes 423 for setting the third bristle bundles 530 are circumferentially distributed at even intervals on the outer peripheral surface of the outer disc body 420, inner ends of the third bristle bundles 530 proximal to the center of the outer disc body 420 being fixedly inserted in the third insertion holes 423, respective third bristle bundles 530 substantially protruding outward along different radial directions of the outer disc body 420. In this implementation, the third bristle bundles 530 are arranged in circles along the peripheral direction of the outer disc body 420 so that the third bristle bundles 530 are distributed over the entire outer peripheral surface of the outer disc body 420 along the circumferential direction of the disc brush 400; in this way, the third bristle bundles 530 can effectively scrub a to-be-cleaned object or surface irrespective of how the disc brush 400 spins. As an alternative solution of this implementation, the third bristles 530 may be arranged in two circles, three circles, or other rational number of circles based on the axial height of the outer peripheral surface of the outer disc body 420.

To enhance scrubbing effect of the disc brush 400, in this implementation, the first bristle bundle 510 and the second bristle bundle 520 are set with different hardnesses. Specifically, the hardness of the first bristle bundle 510 is exemplarily higher than that of the second bristle bundle 520, i.e., the disc brush 400 adopts a bristle setup that is harder inside and softer outside, so that the first bristle bundle 510 of higher hardness can serve to scrub stubborn dirt. As an optional solution of this implementation, the first bristle bundle 510 and the second bristle bundle 520 may be made of plastics or nylon with different hardnesses, each first bristle bundle 510 and each second bristle bundle 520 including a plurality of bristles. The first bristle bundle 510 and the second bristle bundle 520 have their lower ends substantially flush with each other, so that while the disc brush 400 is spinning, the first bristle bundle 510 and the second bristle bundle 520 may simultaneously scrub the to-be-cleaned object or surface effectively. As an alternative solution of this implementation, the first bristle bundle 510 may have a hardness lower than that of the second bristle bundle 520, i.e., the disc brush 400 adopts a bristle setup that is softer inside and harder outside; of course, the first bristle bundle 510 and the second bristle bundle 520 may have a substantially same hardness.

To ensure the effect of the third bristle bundles 530 in scrubbing a to-be-cleaned object, the third bristle bundles 530 are set with certain hardness, which should not be too soft. In this implementation, the third bristle bundles 530 may be made of plastics or nylon, and each third bristle bundle 530 comprises a plurality of bristles. To ensure the scrubbing force of the third bristle bundles 530 while ensuring the service life of the third bristle bundles 530, the third bristle bundles 530 need to be set with a rational length. Referring to FIG. 1, in this implementation, length L of the third bristle bundles 530 protruding outward from the outer peripheral surface of the outer disc body 420 is set to 10 mm˜40 mm; exemplarily, length L of the third bristle bundles 530 is about 30 mm. It may be understood that the length L of the third bristle bundles 530 may be set to other rational values such as 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, 22 mm, 25 mm, 27 mm, 29 mm, 31 mm, 35 mm, 37 mm, or 40 mm.

Referring to FIGS. 1 and 9, in this implementation, the drive assembly 300 comprises an inner shaft 310 and an outer shaft 320, the outer shaft 320 being sleeved outside the inner shaft 310, the outer disc body 420 being connected to a lower end of the outer shaft 320, the inner disc body 410 being connected to a lower end of the inner shaft 310. Exemplarily, the electric motor 200 drives, via the drive assembly 300, the inner disc body 410 and the outer disc body 420 to rotate in opposite directions; opposite rotation of the inner disc body 410 and the outer disc body 420 may offset a movement tendency generated by the spinning disc brush 400, thereby mitigating the force needed for the user to hold the scrubber body, which improves user experience.

Referring to FIGS. 1, 2, 8, 9, and 10, the housing 100 comprises a main housing 110 and a bottom housing 120 that are fixed together; the power scrubber further comprises a speed reducer 600, the speed reducer 600 comprising an input shaft, an output shaft 610, and a planetary gear reduction construction, the planetary gear reduction construction being arranged between the input shaft and the output shaft 610, a rotary shaft of the electric motor 200 being drivingly connected to the input shaft of the speed reducer 600, an upper end of the inner shaft 310 being drivingly connected directly to the output shaft 610 of the speed reducer 600 via a coupling sleeve 330. The output shaft 320 is set axially hollow. The inner shaft 310 is rotatably supported inside the outer shaft 320 by a first bearing set 340. The outer shaft 320 is rotatably supported on the bottom housing 120 by a second bearing set 350. An upper end of the inner shaft 310 is provided with a gear section 311 that is located above the outer shaft 320. The drive assembly 300 further comprises a rack 360, a planetary gear 370, an upper planetary carrier 381, and a lower planetary carrier 382, the rack 360 being fixed to a bottom portion of the speed reducer 600, a lower portion of the rack 360 being provided with an outer ring gear 361, the upper planetary carrier 381 being disposed at a bottom portion of the rack 360, the lower planetary carrier 382 being located under the upper planetary carrier 381, the planetary gear 370 being supported between the upper planetary carrier 381 and the lower planetary carrier 382 by a supporting shaft 390, an upper end of the supporting shaft 390 being securely connected to the upper planetary carrier 381, a lower end of the supporting shaft 390 being securely connected to the lower planetary carrier 382, an upper end of the outer shaft 320 being securely connected to the upper planetary carrier 381. The outer ring gear 361 on the rack 360 is arranged vertically above the gear section 311 on the inner shaft 310. Two or three planetary gears 370 are arranged circumferentially at even intervals, each planetary gear 370 comprising an upper toothed portion 371 meshing with the outer ring gear 361 and a lower toothed portion 372 meshing with the gear section 311. When the electric motor 200 is operating, power is output via the output shaft 610 of the speed reducer 600, the output shaft 610 drives, via the coupling sleeve 330, the inner shaft 310 to rotate synchronously, the rotating inner shaft 310 drives, via engagement between the gear section 311 and the planetary gears 370, the upper planetary carrier 381 and the lower planetary carrier 382 to rotate, and the rotating lower planetary carrier 382 drives the outer shaft 320 to rotate synchronously. Since the gear section 311 and the planetary gears 370 mesh with each other, they rotate in opposite directions, so that the inner shaft 310 and the outer shaft 320 also rotate in opposite directions, whereby the electric motor 200 can drive, via the drive assembly 300, the inner shaft 310 and the outer shaft 320 to rotate in opposite directions.

To facilitate removal and replacement of the disc brush 400, in this implementation, the outer disc body 420 is removably thread-fitted to the lower end of the outer shaft 320; and the inner disc body 410 is removably snap-fitted to the lower end of the inner shaft 310. The lower end of the outer shaft 320 projects downward from the bottom housing 120 out of the housing 100, and a male thread 321 is set on an outer peripheral surface of the lower end of the outer shaft 320. Referring to FIG. 7, a connecting hole 424 disposed on top of the recessed cavity 421 and communicating with the recessed cavity 421 is set in the center of the outer disc body 420; a female thread 425 is set on an inner wall of the connecting hole 424; the outer disc body 420 is removably connected to the lower end of the outer shaft 320 via fitting between the female thread 425 and the male thread 321. The lower end of the inner shaft 310 projects downward out of the housing 100; referring to FIG. 10, a snap connector 312 projecting out of the outer shaft 320 is secured to the lower end of the inner shaft 310, and a plurality of snap-fitting blocks 313 distributed circumferentially at intervals are provided on an outer peripheral surface of the snap connector 312. Referring to FIG. 5, a fit-in hole 412 fitted with the snap connector 312 is set in the center of the inner disc body 410, a turnbuckle 413 corresponding to the snap-fitting block 313 is arranged on an inner wall of the fit-in hole 412, and the inner disc body 410 is removably connected to the lower end of the inner shaft 310 via fitting between the turnbuckle 413 on the inner wall of the fit-in hole 412 and the snap-fitting block 313 on the snap connector 312.

To ensure connection secureness of the outer disc body 420, a thread direction of the thread fitting is exemplarily set opposite the rotating direction of the outer shaft 320, so that the thread fitting becomes increasingly tighter while the outer shaft 320 drives the outer disc body 420 to rotate, preventing the outer disc body 420 from being loosened or released relative to the outer shaft 320. To ensure connection secureness of the inner disc body 410, the snap-fitting direction between the turnbuckle 413 and the snap-fitting block 313 is exemplarily set opposite the rotating direction of the inner shaft 310, preventing the turnbuckle 413 and the snap-fitting block 313 from being loosened or released while the inner disc body 410 is rotating.

To facilitate the user to remove and replace the inner disc body 410, a plurality of finger grooves 414 recessed inwardly towards the center of the inner disc body 410 are distributed at intervals on an outer peripheral surface of the inner disc body 410; the finger grooves 414 allow for the user to effectively hold the inner disc body 410, whereby the user may effectively screw the inner disc body 410, causing the inner disc body 410 to be snap-fitted with the inner shaft 310 in place or to be disengaged therefrom.

Referring to FIG. 11, to facilitate the user to remove and replace the outer disc body 420, a latch 710 configured to lock the outer shaft 320 and a spring 720 acting on the latch 710 are arranged on the housing 100, one end of the spring 720 abutting against the latch 710, an opposite end thereof abutting against the housing 100; the latch 710 that is pressed to lock the outer shaft 320 drives the spring 720 to be elastically deformed; the spring 720 recovering from deformation drives the released latch 710 to disengage from the outer shaft 320. During the process of removing the outer disc body 420, the user may press down the latch 710, causing the latch 710 to abut against the outer shaft 320, blocking the outer shaft 320 from rotating during the process of removing the outer disc body 420, which facilitates the user to remove and replace the outer disc body 420. When the latch 710 abuts against the outer shaft 320, the spring 720 is compressed and deformed; after the latch 710 is released, the spring 720 recovering from deformation can drive the latch 710 to automatically release the outer shaft 320.

To enhance the effect of the latch 710 locking the outer shaft 320, a plurality of slots 322 for inserting the latch 710 are distributed circumferentially at intervals on the outer peripheral surface of the outer shaft 320, so that the latch 710 abutting against the outer shaft 320 can be inserted in the corresponding slot 322 to retain the outer shaft 320 circumferentially; the abutment between the latch 710 and the outer shaft 320 enhances the effect of locking the outer shaft 320 from rotating during the process of removing the outer disc body 420.

Referring to FIG. 7, to enhance the effect of the disc brush 400 scrubbing the to-be-cleaned object, a water discharge channel 426 may be provided on a top wall of the recessed cavity 421; a specific structure of the water discharge channel 426 may refer to the disclosure in CN216876248U, which would not be detailed here.

To use the power scrubber described herein, the outer disc body 420 is first thread-fitted to the lower end of the outer shaft 320, and then the inner disc body 410 is snap-fitted to the lower end of the inner shaft 310. The electric motor 200 is started by activating the button on the housing 100, the running electric motor 200 drives, via the speed reducer 600 and the drive assembly 300, the inner disc body 410 and the outer disc body 420 to rotate in opposite directions, and the rotating inner disc body 410 and outer disc body 420 drive the first bristle bundles 510 and the second bristle bundles 520 to scrub a to-be-cleaned object or surface. When the power scrubber according to this implementation is applied to scrub a floor surface, the first bristle bundles 510 and the second bristle bundles 520 serve to scrub the floor surface, and the third bristle bundles 530 may scrub the wall surface nearby the floor surface, so that the user can effectively scrub the wall surface around the wall corner without a need of readjusting the orientation of the disc brush 400, whereby user experience is enhanced.

It would be understood that the power scrubber according to this implementation may be powered by batteries or powered by mains electricity via a wire.

It would be understood that the power scrubber according to this implementation may have an appearance generally resembling a pistol structure, a linear structure, or an elongated rod structure.

In addition to the example implementation described above, the disclosure also has other implementations; those skilled in the art may make various modifications and transformations to the disclosure, and such modifications and transformations shall all fall within the scope defined in the appended claims without departing from the spirits of the disclosure.