TIGHTNESS ADJUSTING APPARATUS AND HEAD-MOUNTED DEVICE

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Chinese Patent Application No. 202423151972.9, filed on December 18, 2024, entitled “Tightness Adjusting Apparatus and Head-Mounted Device”, which is incorporated herein by reference in its entirety.

FIELD

The present disclosure relates to a tightness adjusting apparatus and a head-mounted device.

BACKGROUND

A head-mounted device can fix a display module or an audio module to a user's head to enhance user experience of. A strap can enhance stability of the device, allowing the user's head to move when wearing the head-mounted device. To accommodate users with different head sizes, it is necessary to adjust a tightness degree of the tying band. How to simplify an adjusting way of the tightness degree of the strap while ensuring stability of the head-mounted device when it is worn by user has become a problem to be solved.

SUMMARY

Embodiments of the present disclosure provide a tightness adjusting apparatus and a head-mounted device.

According to one aspect of embodiment of the present disclosure, a tightness adjusting apparatus is provided, including: a body and a locking member.

The body includes a mounting base and an adjusting belt. The adjusting belt includes a gear belt, and an inner wall of the mounting base is provided with a plurality of inner teeth.

The locking member is rotatably arranged on the mounting base. The locking member includes a rotating body, a drive gear and a locking piece. The drive gear is engaged with the gear belt and drives the adjusting belt to move, the locking piece is arranged on the rotating body and includes a limiting body and an elastic body, and the limiting body is operably snap-fitted to the inner teeth by means of an elastic force of the elastic body.

In response to a rotation of the locking member in a first direction, the limiting body slides on the plurality of inner teeth, and in response to a rotation of the locking member by a predetermined angle in a second direction, the limiting body is separated from the plurality of inner teeth, and the elastic body undergoes bending deformation.

According to another aspect of embodiment of the present disclosure, a head-mounted device is provided, including: a tightness adjusting apparatus. The tightness adjusting apparatus includes a body and a locking member. The body includes a mounting base and an adjusting belt. The adjusting belt includes a gear belt. An inner wall of the mounting base is provided with inner teeth. The locking member is rotatably arranged on the mounting base and includes a rotating body, a drive gear and a locking piece. The drive gear is engaged with the gear belt and drives the adjusting belt to move. The locking piece is arranged on the rotating body and includes a limiting body and an elastic body. The limiting body is operably snap-fitted to the inner teeth by an elastic force of the elastic body. In response to a rotation of the locking member in a first direction, the limiting body slides on the plurality of inner teeth, and in response to a rotation of the locking member by a predetermined angle in a second direction, the limiting body is separated from the plurality of inner teeth, and the elastic body undergoes bending deformation.

BRIEF DESCRIPTION OF DRAWINGS

The foregoing and other objectives, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a tightness adjusting apparatus according to an embodiment of the present disclosure;

FIG. 2 is a partial schematic diagram of a tightness adjusting apparatus according to an embodiment of the present disclosure;

FIG. 3 is a schematic exploded diagram of a tightness adjusting apparatus according to an embodiment of the present disclosure;

FIG. 4 is a schematic exploded diagram of a locking member according to an embodiment of the present disclosure;

FIG. 5 is a schematic sectional diagram of a mounting base, a drive member and a washer according to an embodiment of the present disclosure;

FIG. 6 is a schematic sectional diagram of a drive member according to an embodiment of the present disclosure; and

FIG. 7 is a schematic diagram of working states of a locking member according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present disclosure is described below based on the embodiments, but the present disclosure is not limited to these embodiments. In the following detailed description of the present disclosure, some specific details are described in detail. The present disclosure can be fully understood by those skilled in the art without the description of these details. In order to avoid confusing the substance of the present disclosure, well-known methods, processes, procedures, elements, and circuits are not described in detail.

In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, similar words such as "including" and "containing" throughout the application document should be interpreted as inclusive rather than exclusive or exhaustive; that is to say, it means "including but not limited to".

In the description of the present disclosure, it should be understood that the terms “first”, “second”, and the like are used for descriptive purposes only and cannot be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, the term “a plurality of” means two or more, unless otherwise stated.

Unless otherwise specified and limited, the terms “mounted”, “connected”, “connection”, “fixed”, and the like should be understood broadly. For example, the “connection” may be a fixed connection, a detachable connection, or an integrated connection, may be a direct connection or an indirect connection by means of an intermediate medium, or may be an internal connection of two elements or an interaction between two elements. For those of ordinary skill in the art, specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

FIG. 1 is a schematic structural diagram of a tightness adjusting apparatus according to an embodiment. FIG. 2 is a partial schematic diagram of a tightness adjusting apparatus according to an embodiment. FIG. 3 is a schematic exploded diagram of a tightness adjusting apparatus according to an embodiment.

In some embodiments, as shown in FIGS. 1-3, the tightness adjusting apparatus includes a locking member 1 and a body 3. The body 3 includes a mounting base 31 and an adjusting belt 32, and the adjusting belt 32 includes a gear belt 321. The drawings show a portion of the adjusting belt 32 connected to the mounting base 31, and the adjusting belt 32 is tied around a head, so as to fix a display module or an audio module to the head.

FIG. 4 is a schematic exploded diagram of a locking member 1 according to an embodiment. FIG. 5 is a schematic sectional diagram of a mounting base 31, a drive member 2 and a washer 6 according to an embodiment.

In some embodiments, as shown in FIGS. 4-5, the mounting base 31 has a mounting hole 33, and a plurality of inner teeth 331 are arranged on an inner wall of the mounting hole 33. The locking member 1 is rotatably arranged in the mounting hole 33. The locking member 1 includes a rotating body 12, a drive gear 13 and a locking piece 11. The drive gear 13 is engaged with the gear belt 321 and drives the adjusting belt 32 to move. In this way, a tightness degree of the adjusting belt 32 is adjusted.

In some embodiments, as shown in FIGS. 2-3, there are two adjusting belts 32, and each is provided with a gear belt 321. The two gear belts 321 are arranged opposite to each other and are engaged with the drive gear 13 at the same time. The drive gear 13 may drive the two adjusting belts 32 to be tightened or loosened at the same time.

In some embodiments, with reference to FIGS. 4-5, the locking piece 11 is arranged on the rotating body 12 and includes a limiting body 111 and an elastic body 112. The limiting body 111 is operably snap-fitted to the inner teeth 331 by means of an elastic force of the elastic body 112. That is, elastic deformation of the elastic body 112 drives the limiting body 111 to move toward the inner teeth 331 and be abutted against the inner teeth 331. This ensures that the locking member 1 does not rotate without an external force, thereby preventing the two adjusting belts 32 from being loosened.

If the locking member 1 rotates in a first direction, the limiting body 111 slides on the plurality of inner teeth 331. If the locking member rotates by a predetermined angle in a second direction, the limiting body 111 is separated from the inner teeth 331, and the elastic body 112 undergoes bending deformation. That is, when the locking member 1 is subjected to the external force and then rotates in the first or second direction, the adjusting belt 32 is tightened or loosened by means of the drive gear 13.

FIG. 6 is a schematic sectional diagram of a drive member 2 according to an embodiment.

In some embodiments, with reference to FIG. 6, the tightness adjusting apparatus further includes a drive member 2, configured to drive the locking member 1 to rotate. The drive member 2 includes a first drive column 21. The limiting body 111 has a first drive groove 114, and the first drive column 21 extends into the first drive groove 114. With the configuration that the drive member 2 is drives the locking member 1 to rotate and includes the first drive column 21 extending into the first drive groove 114, a finger of the user rotates the drive member 2, so that the drive member 2 drives the locking member 1 to rotate, thereby driving the two adjusting belts 32 to move. FIG. 7 is a schematic diagram of working states of a locking member 1 according to an embodiment. State I, state II and state III in the drawing are different working states of the tightness adjusting apparatus.

In some embodiments, with reference to the state I in FIG. 7, when the drive member 2 rotates in the first direction, the limiting body 111 slides on the plurality of inner teeth 331. In this embodiment, the locking piece 11 and the inner teeth 331 form an inner engaging ratchet mechanism. In this embodiment, the limiting body 111 may be equivalent to a pawl, while the inner teeth 331 may be equivalent to a ratchet. When the drive member 2 rotates in the first direction, the elastic body 112 can undergo a small deformation, allowing the limiting body 111 to move toward a center of the mounting hole 33. This enables the limiting body 111 to continuously slide on the plurality of inner teeth 331 in sequence. Also, once tightened to a certain degree, the adjusting belt is maintained at a current tightening level.

In some embodiments, with reference to the state II in FIG. 7, when the drive member 2 rotates by the predetermined angle in the second direction, the first drive column 21 drives, by means of the first drive groove 114, the limiting body 111 to be separated from the inner teeth 331, and the elastic body 112 undergoes bending deformation. Thus, the limiting body 111 avoids the inner teeth 331, enabling the locking member 1 to rotate in a reverse direction, so as to release the two adjusting belts 32.

In some embodiments, after the drive member 2 rotates by the predetermined angle in the second direction, the first drive column 21 is abutted against an inner wall of the first drive groove 114. When the drive member 2 continues to rotate, the first drive column 21 will push the limiting body 111 to move toward the elastic body 112, which forces the elastic body 112 to undergo bending deformation, thereby moving the limiting body 111 away from the inner teeth 331.

In summary, for the tightness adjusting apparatus in embodiments, the locking member 1 is rotatably connected to the mounting base 31, and the drive member 2 is configured to drive the locking member 1 to rotate, thereby driving the adjusting belts 32 to move by means of engagement between the drive gear 13 and the gear belt 321. Thus, the limiting body 111 is abutted against the inner teeth 331 by the elastic force of the elastic body 112, the locking member 1 locks the adjusting belts 32 by the locking member 1 more stably, allowing the adjusting belts 32 to be securely tied around the head. Moreover, when the drive member 2 rotates in the first direction, the elastic force of the elastic body 112 causes the limiting body 111 to slide along the inner teeth 331. When the drive member 2 rotates in the second direction, the first drive column 21 and the first drive groove 114 cause the limiting body 111 to be separated from the inner teeth 331. The user can adjust tightness of the adjusting belts 32 by directly rotating the drive member 2. This simplifies an adjusting way.

In some embodiments, as shown in FIG. 4, the rotating body 12 includes a turntable 121 and a rotating shaft 122. The locking piece 11 further includes a connecting body 113 connected between the limiting body 111 and the elastic body 112, and the connecting body 113 is rotatably connected to the turntable 121 by means of the rotating shaft 122. With reference to the state II in FIG. 7, the first drive column 21 is abutted against a side wall of the first drive groove 114, and drives the limiting body 111 to rotate away from the inner teeth 331.

For example, the elastic body 112 is an elastic sheet. One end of the elastic sheet is abutted against the inner wall of the first drive groove 114, and the other end is connected to the connecting body 113. When the first drive column 21 drives the limiting body 111 to move away from the inner teeth 331, the elastic body 112 undergoes bending deformation toward the limiting body 111, causing an included angle between the elastic sheet and the limiting body 111 to decrease. Thus, after the user releases the drive member 2, the elastic force of the elastic body 112 quickly make the limiting body 111 reset, causing the limiting body 111 to be engaged with the inner teeth 331 again.

In some embodiments, as shown in FIG. 4, an accommodating groove 1211 is formed in the turntable 121, the rotating shaft 122 protrudes from a bottom surface of the accommodating groove 1211, the accommodating groove 1211 includes a first positioning surface 1212 and a first notch 1213, the first notch 1213 is located at an edge of the turntable 121. One end of the elastic body 112 is connected to the connecting body 113, and the other end bends toward the first positioning surface 1212 and is abutted against the first positioning surface 1212. The connecting body 113 has a connecting hole 1131, and the connecting hole 1131 is rotatably sleeved on the rotating shaft 122. The limiting body 111 includes a snap head 1111. With reference to the state I in FIG. 7, during stretching deformation of the elastic body 112, the snap head 1111 passes the first notch 1213 and is snap-fitted with the inner teeth 331.

In some embodiments, a first inclined surface and a second inclined surface are arranged on two sides of each inner tooth 331. The first inclined surface has a smaller inclining amplitude than the second inclined surface. When rotating in the first direction, the snap head 1111 may slide to the adjacent inner tooth 331 along the first inclined surface. In this process, a deformation amount of the elastic body 112 enables the limiting body 111 to continuously oscillate. Meanwhile, the accommodating groove 1211 is used for accommodating the locking piece 11, making the locking member 1 have a more compact structure. The accommodating groove 1211 can also limit a movement amplitude of the locking piece 11.

In some embodiments, as shown in FIG. 4, the inner wall of the first drive groove 114 includes a drive surface 1141. A second drive groove 1214 is formed in the turntable 121. In some embodiments, with reference to FIG. 7, a side wall of the second drive groove 1214 includes a first position 41 and a second position 42 arranged at an interval. With reference to FIG. 6, the drive member 2 further includes a second drive column 22, and the second drive column 22 extends into the second drive groove 1214. When being abutted against the first position 41, the second drive column 22 drives the turntable 121 rotate in the first direction by means of the first position 41. When being abutted against the second position 42, the second drive column 22 drives the turntable 121 to rotate in the second direction by means of the second position 42. Meanwhile, when the second drive column 22 moves from the first position 41 to the second position 42, the first drive column 21 drives the limiting body 111 to be separated from the inner teeth 331 by means of the drive surface 1141.

That is, when the drive member 2 rotates in the second direction, the limiting body 111 is first separated from the inner teeth 331 under the driving of the first drive column 21, and then the turntable 121 rotates again under the driving of the second drive column 22. Therefore, the locking member 1 is first unlocked and then rotates, thereby simplifying the user's operation on the tightness adjusting apparatus. In this way, it prevents the locking piece 11 from affecting rotation of the rotating body 12.

With reference to the state I in FIG. 7, when the turntable 121 rotates in the first direction, the first drive column 21 remains spaced apart from the inner wall of the first drive groove 114. That is, the first drive column 21 is not in contact with the side wall of the first drive groove 114, thereby preventing the drive member 2 from transmitting an acting force to the inner teeth 331 via the locking piece 11. This weakens friction between the locking member 1 and the inner teeth 331.

In some embodiments, as shown in FIG. 6, the drive member 2 further includes a cover body 23 rotatably connected to the mounting base 31, and the first drive column 21 and the second drive column 22 protrude from the cover body 23. With reference to FIG. 7, the second drive groove 1214 further includes a third position 43, and the third position 43 is located between the first position 41 and the second position 42.

After the user rotates the drive member 2 by the predetermined angle in the second direction, the user will release the drive member 2. In this configuration, the elastic body 112 will drive the limiting body 111 to move toward the inner teeth 331, enabling the drive surface 1141 to drive the cover body 23 to rotate by a small angle in the reverse direction (i.e., in the first direction) by means of the first drive column 21. At this time, the second drive column 22 will move from the second position 42 to the third position 43.

In some embodiments, the second drive groove 1214 is an arch-shaped groove that faces the cover body 23 and extends along the center of the turntable 121. In an extension direction of the arch-shaped groove, there are the first position 41, the third position 43, and the second position 42 sequentially arranged at an interval. Thus, the locking piece 11 can reset in time, preventing the elastic force of the elastic body 112 from acting on the turntable 121. This facilitates the tightness adjusting apparatus to perform self-locking in time.

In some embodiments, as shown in FIG. 6, the drive member 2 further includes a first positioning column 24 protruding from a center of the cover body 23. With reference to FIG. 2 and FIG. 5, the tightness adjusting apparatus further includes a positioning member 5, and the positioning member 5 has a second positioning surface 51. The mounting base 31 has a third positioning surface 311 opposite to the second positioning surface 51. The third positioning surface 311 is arranged on one side, away from the cover body 23, of the mounting base 31. The mounting base 31 further includes a sleeve 312. For example, with reference to FIG. 4, a first through hole 1215 is formed in the center of the turntable 121. The turntable 121 is rotatably sleeved on the sleeve 312, the sleeve 312 extends through the first through hole 1215, and the first positioning column 24 passes through the sleeve 312 and is then connected to the positioning member 5.

In some embodiments, the second positioning surface 51 and the third positioning surface 311 are in a separable state. That is, after the drive member 2 is fixed to the positioning member 5, it can slightly move in an axial direction of the first positioning column 24. This enables the drive member 2 and the positioning member 5 to be fixed to the mounting base 31 together while ensuring that the drive member 2 and the positioning member 5 rotate together, thereby weakening friction between them and the mounting base 31.

In some embodiments, as shown in FIG. 4 and FIG. 5, the tightness adjusting apparatus further includes a washer 6. The washer 6 is arranged in the first through hole 1215, and is abutted against the mounting plate 231. Therefore, the washer has the buffer effect in axial movement of the drive member 2 and the positioning member 5.

In some embodiments, as shown in FIG. 5, the mounting hole 33 includes a first mounting hole 332 and a second mounting hole 333 communicating with each other. The first mounting hole 332 and the second mounting hole 333 are arranged in an axial direction. A plurality of inner teeth 331 are arranged on a side wall of the first mounting hole 332, and the sleeve 312 protrudes from a center of a bottom of the second mounting hole 333. With reference to FIG. 2, a second notch 334 is formed one a side wall of the second mounting hole 333. The rotating body 12 is arranged in the first mounting hole 332. The drive gear 13 is arranged in the second mounting hole 333 with one or more teeth of the drive gear 13 located on an outer side of the second notch 334 and engaged with the gear belt 321. For example, there are two second notches 334 corresponding to the two gear belts 321. The drive gear 13 is engaged with the two gear belts 321 via the two second notches 334.

In some embodiments, as shown in FIG. 3, the positioning member 5 includes a screw 52 and a positioning piece 53. The positioning piece 53 includes a second positioning column 531 and a positioning sheet 532. The second positioning column 531 has a second through hole 5311. The positioning sheet 532 has a second positioning surface 51. With reference to FIG. 5, the second positioning column 531 extends into the sleeve 312 and is then abutted against the first positioning column 24. One end of the screw 52 is connected to the positioning piece 53, and the other end passes through the second through hole 5311 and is then in threaded connection with the first positioning column 24. In this embodiment, the second positioning column 531 and the first positioning column 24 provide positioning for the drive gear 13, ensuring stable engagement between the drive gear 13 and the two gear belts 321.

Further, there are a plurality of accommodating grooves 1211 which are uniformly distributed around the center of the turntable 121. There are a plurality of locking pieces 11 which are arranged in the accommodating grooves 1211 in one-to-one correspondence, and there are a plurality of first drive columns 21 which extend into the corresponding first drive groove 114. For example, there are three locking pieces 11 and three first drive columns 21. This ensures more balanced axial stress on the locking member 1 and locking stability of the locking member 1.

In some embodiments, as shown in FIGS. 5-7, the mounting base 31 has an arch-shaped guide groove 313, which is located on an outer side of the mounting hole 33. The cover body 23 includes a mounting plate 231 and a flange 232 arranged at an edge of the mounting plate 231. The first positioning column 24, the first drive column 21 and second drive column 22 are mounted on the mounting plate 231. The flange 232 extends into the arch-shaped guide groove 313 and then rotates along the arch-shaped guide groove 313.

For example, there are two arch-shaped guide grooves 313 arranged on two sides of the mounting hole 33. The two arch-shaped guide grooves 313 bend away from the mounting hole 33. In this embodiment, the arch-shaped guide grooves 313 are matched with the flange 232 to guide rotation of the drive member 2. An edge of the flange 232 may be in contact with bottoms of the arch-shaped guide grooves 313 to limit an axial position of the drive member 2.

In some embodiments, the tightness adjusting apparatus in the above embodiment may be applied to a head-mounted device. The head-mounted device may be a smart glasses for achieving virtual reality or augmented reality.

For the head-mounted device in this embodiment, a locking member 1 of the tightness adjusting apparatus is rotatably connected to a mounting base 31, and a drive member 2 is configured to drive the locking member 1 to rotate and further drive an adjusting belt 32 to move by means of engagement between a drive gear 13 and a gear belt 321. Thus, a limiting body 111 is abutted against inner teeth 331 by an elastic force of an elastic body 112, which makes locking of the adjusting belt 32 by the locking member 1 more stable, allowing the head-mounted device to be securely tied around a head. Moreover, when the drive member 2 rotates in the first direction, the elastic force of the elastic body 112 allows the limiting body 111 to slide along the inner teeth 331. When the drive member 2 rotates in the second direction, the first drive column 21 and the first drive groove 114 cause the limiting body 111 to be separated from the inner teeth 331. The user can adjust tightness of the adjusting belts 32 by directly rotating the drive member 2. This simplifies an adjusting way.

The above description shows merely exemplary embodiments of the present disclosure, and is not intended to limit the present disclosure. For those skilled in the art, various modifications and changes may be made to the present disclosure. Any modification, equivalent, improvement, etc. made within the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.