Tightness adjusting device and head-mounted equipment

Abstract

The embodiment of the utility model discloses a tightness adjusting device and head-mounted equipment, a locking part is rotatably connected with a mounting seat, and external force drives the locking part to rotate so as to drive an adjusting belt to move through meshing of a driving gear and a rack. Therefore, the limiting body abuts against the inner teeth through the elastic force of the elastic body, locking of the adjusting belt by the locking part is more stable, and the adjusting belt can be stably bound to the head. Moreover, when the locking part rotates in the first direction, the elastic force of the elastic body enables the limiting body to slide along the inner teeth. When the locking part rotates in the second direction, the limiting body can be separated from the inner teeth. A user can drive the locking part to rotate, so that the tightness of the adjusting belt can be adjusted. Therefore, the adjusting mode is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to wearable equipment technical field especially, it relates to a tightness adjusting device and head -mounted device. BACKGROUND

[0002] The head-mounted device can fix the display module or the audio module with the head of the user to improve the use experience of the user. The stability of the device can be improved by using the strap, and the head of the user can move in wearing. In order to adapt to the different head circumference of the user, the tightness of the strap needs to be adjusted. How to simplify the adjustment mode of the tightness of the strap, while ensuring the stability of the head-mounted device bound on the head, becomes a problem to be solved. SUMMARY

[0003] Therefore, the utility model embodiment provides a tightness adjusting device and head-mounted device, when the locking portion rotates along the second direction, the locking portion is unlocked, and the tightness of the adjusting band can be directly adjusted.

[0004] According to the first aspect of the utility model embodiment, a kind of tightness adjusting device, the tightness adjusting device includes:

[0005] Body, including mounting seat and adjusting band, the adjusting band includes rack, the mounting seat has mounting hole, and the inner wall of the mounting hole is equipped with multiple internal toothing;And

[0006] Locking portion, rotatably arranged in the mounting hole, the locking portion includes rotating body, drive gear and locking piece, the drive gear is engaged with the rack and drives the adjusting band to move, the locking piece is arranged in the rotating body and includes limiting body and elastic body, the limiting body and the internal toothing are operatively engaged by the elastic force of the elastic body;

[0007] The locking portion rotates along the first direction, the limiting body slides on multiple internal toothing, the locking portion rotates along the second direction by predetermined angle, the limiting body is separated from the internal toothing and the elastic body is bent and deformed.

[0008] Further, it further includes drive portion, is configured as drive the rotating locking portion and includes first drive column, the limiting body has first drive slot, and the first drive column extends into the first drive slot.

[0009] Further, the rotating body includes rotary disc and pivot shaft;

[0010] The locking piece further includes connecting body, and the connecting body is connected between the limiting body and the elastic body, and the connecting body is rotatably connected with the rotary disc by the pivot shaft;

[0011] The first driving column abuts against the sidewall of the first driving slot and drives the limiting body to rotate away from the inner teeth.

[0012] Further, the rotating disc is provided with a receiving slot, the rotating shaft is protruded from the bottom surface of the receiving slot, the receiving slot comprises a first positioning surface and a first gap, the first gap is located at the edge of the rotating disc, one end of the elastic body is connected with the connecting body, the other end of the elastic body is bent towards the first positioning surface and abuts against the first positioning surface;

[0013] The connecting body is provided with a connecting hole, the connecting hole is rotatably sleeved on the rotating shaft, the limiting body comprises a clamping head;

[0014] The elastic body is stretched and deformed, the clamping head passes through the first gap and is clamped with the inner teeth.

[0015] Further, the rotating disc is provided with a second driving slot, the sidewall of the second driving slot comprises a first position and a second position which are spaced apart;

[0016] The driving part further comprises a second driving column, the second driving column is protruded into the second driving slot;

[0017] The rotating disc rotates along the first direction, the second driving column is located at the first position, the rotating disc rotates along the second direction, the second driving column is located at the second position.

[0018] Further, the rotating disc rotates along the first direction, the first driving column is spaced apart from the inner wall of the first driving slot.

[0019] Further, the driving part further comprises a cover body, the cover body is rotatably connected with the mounting seat, the first driving column and the second driving column are protruded from the cover body;

[0020] The second driving slot further comprises a third position, the third position is located between the first position and the second position;

[0021] The elastic body drives the limiting body to move towards the inner teeth, the inner wall of the first driving slot drives the cover body to rotate through the first driving column, and the second driving column moves to the third position.

[0022] Further, the driving part further comprises a first positioning column, the first positioning column is protruded from the center of the cover body;

[0023] The tightness adjusting device further comprises a positioning part;

[0024] The mounting seat further comprises a sleeve, a first through hole is formed in the center of the rotating disc, the rotating disc is rotatably sleeved on the sleeve through the first through hole, and the first positioning column is connected with the positioning part through the sleeve.

[0025] Further, the mounting hole comprises a first mounting hole and a second mounting hole which are in communication in the axial direction, a plurality of inner teeth are arranged on the side wall of the first mounting hole, a second notch is formed on the side of the second mounting hole, and the sleeve is arranged at the center of the bottom of the second mounting hole.

[0026] The rotating body is arranged in the first mounting hole, the drive gear is arranged in the second mounting hole, and part of the teeth of the drive gear is located outside the second notch and engaged with the rack.

[0027] Further, the positioning part comprises:

[0028] A screw;

[0029] A positioning member comprising a second positioning column and a positioning sheet, the second positioning column having a second through hole;

[0030] The second positioning column extends into the sleeve and abuts against the first positioning column, one end of the screw is connected with the positioning member, and the other end of the screw is threadedly connected with the first positioning column through the second through hole.

[0031] Further, the number of the accommodation grooves is multiple and is uniformly distributed around the center of the rotating disc.

[0032] The number of the locking members is multiple and is arranged in the multiple accommodation grooves one by one, and the number of the first driving columns is multiple and extends into the corresponding first driving grooves.

[0033] In a second aspect, the utility model embodiment further provides a head-mounted device, the head-mounted device comprises:

[0034] The tightness adjusting device according to the first aspect.

[0035] The tightness adjusting device and the head-mounted device, the locking part is rotatably connected with the mounting seat, the locking part rotates to drive the adjusting belt to move through the engagement of the drive gear and the rack. Thus, the limiting body abuts on the inner teeth by the elastic force of the elastic body, so that the locking of the locking part on the adjusting belt is more stable, and the adjusting belt can be stably bound on the head. Furthermore, when the locking part rotates in the first direction, the elastic force of the elastic body makes the limiting body slide along the inner teeth. When the locking part rotates in the second direction, the limiting body can be separated from the inner teeth. The user can adjust the tightness of the adjusting belt by rotating the locking part. Thus, the adjusting mode is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application with reference to the accompanying drawings, in which:

[0037] Figure 1 is a structure schematic view of the tightness adjusting device of the embodiment of the present application;

[0038] Figure 2 is a partial schematic view of the tightness adjusting device of the embodiment of the present application;

[0039] Figure 3 is an exploded schematic view of the tightness adjusting device of the embodiment of the present application;

[0040] Figure 4 is an exploded schematic view of the locking portion of the embodiment of the present application;

[0041] Figure 5 is a sectional view schematic view of the mounting seat, the driving portion and the gasket of the embodiment of the present application;

[0042] Figure 6 is a sectional view schematic view of the driving portion of the embodiment of the present application;

[0043] Figure 7 is a working state schematic view of the locking portion of the embodiment of the present application.

[0044] Explanation of reference signs:

[0045] 1 - locking portion;

[0046] 11 - locking piece; 111 - limiting body; 1111 - clamping joint;

[0047] 112 - elastic body; 113 - connecting body; 1131 - connecting hole;

[0048] 114 - first driving groove; 1141 - driving face;

[0049] 12 - rotating body; 121 - rotating disc; 1211 - accommodating groove; 1212 - first positioning face; 1213 - first notch; 1214 - second driving groove; 1215 - first through hole;

[0050] 122 - rotating shaft;

[0051] 13 - driving gear;

[0052] 2 - driving portion;

[0053] 21 - first driving column; 22 - second driving column; 23 - cover body; 231 - mounting plate; 232 - flange; 24 - first positioning column;

[0054] 3 - body;

[0055] 31-mounting seat; 311-third positioning surface; 312-sleeve; 313-arc-shaped guide slot;

[0056] 32-adjusting belt; 321-rack;

[0057] 33-mounting hole; 331-internal tooth; 332-first mounting hole; 333-second mounting hole; 334-second notch;

[0058] 41-first position; 42-second position; 43-third position;

[0059] 5-positioning part;

[0060] 51-second positioning surface; 52-screw; 53-positioning piece; 531-second positioning column; 5311-second through hole; 532-positioning sheet;

[0061] 6-washer. DETAILED DESCRIPTION

[0062] The utility model is described below based on examples, but the utility model is not limited to these examples only. In the following detailed description of the utility model, some specific details are described in detail. The utility model can also be fully understood without the description of these details for those skilled in the art. In order to avoid confusion of the essence of the utility model, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0063] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and the drawings are not necessarily drawn to scale.

[0064] Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0065] In the description of the utility model, it is to be understood that the terms "first", "second" and the like are only used for the purpose of description and can not be understood as indicating or implying relative importance. In addition, in the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0066] Unless otherwise defined, the terms "mounting", "connected", "connecting", "fixed", and the like, are to be construed as broad terms, for example, can be fixed connection, can be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be internal connection of two elements, or interaction relationship of two elements, unless otherwise explicitly defined. The specific meaning of the above terms in the utility model can be understood according to the specific circumstances by those skilled in the art.

[0067] Figure 1 It is a structure schematic view of the tightness adjusting device of the embodiment. Figure 2 It is a partial schematic view of the tightness adjusting device of the embodiment. Figure 3 It is an explosion schematic view of the tightness adjusting device of the embodiment.

[0068] In some embodiments, as shown in the figure, the tightness adjusting device of the embodiment comprises a locking part 1 and a body 3. The body 3 comprises a mounting seat 31 and an adjusting belt 32, and the adjusting belt 32 comprises a rack 321. The figure shows the part of the adjusting belt 32 connected with the mounting seat 31, which is bound to the head, so as to fix the display module or the audio module on the head. Figures 1-3

[0069] Figure 4 It is an explosion schematic view of the locking part 1 of the embodiment. Figure 5 It is a sectional view schematic view of the mounting seat 31, the driving part 2 and the gasket 6 of the embodiment.

[0070] In some embodiments, as shown in the figure, the mounting seat 31 has a mounting hole 33, and the inner wall of the mounting hole 33 is provided with a plurality of internal teeth 331. The locking part 1 is rotatably arranged in the mounting hole 33. The locking part 1 comprises a rotating body 12, a driving gear 13 and a locking piece 11, and the driving gear 13 is engaged with the rack 321 and drives the adjusting belt 32 to move. Thus, the tightness of the adjusting belt 32 is adjusted. Figures 4-5 Specifically, as shown in the figure, the number of the adjusting belt 32 is two, and each is provided with the rack 321, and the two racks 321 are oppositely arranged and simultaneously engaged with the driving gear 13. The driving gear 13 can simultaneously drive the two adjusting belts 32 to tighten or loosen.

[0071] Figures 2-3 Further referring to the figure,

[0072] Further referring to the figure, Figures 4-5 ​​The locking member 11 is arranged on the rotating body 12 and includes a limiting body 111 and an elastic body 112. The limiting body 111 is operatively engaged with the inner teeth 331 through the elastic force of the elastic body 112. That is, the elastic body 112 is elastically deformed to drive the limiting body 111 to move towards the inner teeth 331 and abut, so as to ensure that the locking portion 1 will not rotate without the driving of external force, preventing the two adjusting belts 32 from loosening.

[0073] When the locking portion 1 rotates along the first direction, the limiting body 111 slides on the plurality of inner teeth 331, and when the locking portion rotates along the second direction by a preset angle, the limiting body 111 is separated from the inner teeth 331 and the elastic body 112 is bent and deformed. That is, when the locking portion 1 is subjected to external force, it can rotate along the first direction or the second direction, and the adjusting belts 32 are tightened or loosened by the driving gear 13.

[0074] Figure 6 is a cross-sectional view of the driving portion 2 of the embodiment.

[0075] Further referring to Figure 6 The locking portion 1 further includes a driving portion 2 configured to drive the locking portion 1 to rotate and including a first driving column 21, the limiting body 111 has a first driving slot 114, and the first driving column 21 extends into the first driving slot 114. The driving portion 2 is configured to drive the locking portion 1 to rotate, and the driving portion 2 includes the first driving column 21, which extends into the first driving slot 114. The user can rotate the driving portion 2 by fingers, so that the driving portion 2 can drive the locking portion 1 to rotate, and in turn drive the two adjusting belts 32 to move. Figure 7 is a working state diagram of the locking portion 1 of the embodiment. State I, state II and state III in the figure are different working states of the tightness adjusting device.

[0076] Further referring to Figure 7 When the driving portion 2 rotates along the first direction, the limiting body 111 slides on the plurality of inner teeth 331. The locking member 11 in the embodiment forms an internal meshing ratchet mechanism with the inner teeth 331. The limiting body 111 in the embodiment can be equivalent to a pawl, and the inner teeth 331 can be equivalent to a ratchet wheel. When the driving portion 2 rotates along the first direction, the elastic body 112 can produce a small deformation, so that the limiting body 111 can move towards the center of the mounting hole 33, so that the limiting body 111 can continuously slide on the plurality of inner teeth 331 in turn, and when tightened to a certain degree, it can be kept at the current tightening degree at any time.

[0077] Further referring to Figure 7As shown in state II, when the driving unit 2 rotates in the second direction by a predetermined angle, the first driving post 21 drives the limiting body 111 to separate from the inner teeth 331 through the first driving slot 114, and the elastic body 112 bends and deforms. As a result, the limiting body 111 can clear the inner teeth 331, allowing the locking unit 1 to rotate in the opposite direction, loosening the two adjustment straps 32.

[0078] Specifically, after the driving part 2 rotates a predetermined angle in the second direction, the first driving column 21 abuts against the inner wall of the first driving groove 114. When the driving part 2 continues to rotate, the first driving column 21 pushes the limiting body 111 to move toward the elastic body 112, forcing the elastic body 112 to bend and deform, so as to retract the limiting body 111 in the direction away from the inner teeth 331.

[0079] In summary, the tension adjustment device in this embodiment rotates the locking portion 1 and the mounting seat 31, and the driving portion 2 is configured to drive the locking portion 1 to rotate, so as to drive the adjustment belt 32 to move through the engagement of the driving gear 13 and the rack 321. As a result, the limiting body 111 uses the elastic force of the elastic body 112 to abut against the inner teeth 331, making the locking of the adjustment belt 32 by the locking portion 1 more stable, and the adjustment belt 32 can be stably tied to the head. Furthermore, when the driving portion 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 driving portion 2 rotates in the second direction, the limiting body 111 can separate from the inner teeth 331 through the cooperation of the first driving column 21 and the first driving groove 114. The user can directly rotate the driving portion 2 to adjust the tension of the adjustment belt 32. Thus, the adjustment method is simplified.

[0080] In some embodiments, as Figure 4 As shown, the rotating body 12 includes a rotating disk 121 and a rotating shaft 122. The locking member 11 also includes a connecting body 113, which is connected between the limiting body 111 and the elastic body 112, and the connecting body 113 is rotatably connected to the rotating disk 121 through the rotating shaft 122. Figure 7 As shown in state II, the first driving column 21 abuts against the side wall of the first driving groove 114 and drives the limiting body 111 to rotate in a direction away from the inner teeth 331.

[0081] Specifically, the elastic member 112 is a spring. One end of the spring contacts the inner wall of the first drive slot 114, and the other end is connected to the connector 113. As the first drive column 21 drives the limiting member 111 away from the inner teeth 331, the elastic member 112 bends toward the limiting member 111, reducing the angle between the spring and the limiting member 111. Therefore, when the user releases the drive unit 2, the elastic force of the elastic member 112 quickly resets the limiting member 111, causing it to reengage with the inner teeth 331.

[0082] In some embodiments, as shown in Figure 4 The rotating disc 121 is provided with a receiving groove 1211, and the rotating shaft 122 is protruded from the bottom surface of the receiving groove 1211. The receiving groove 1211 comprises a first positioning surface 1212 and a first gap 1213. The first gap 1213 is located at the edge of the rotating disc 121. One end of the elastic body 112 is connected with the connecting body 113, and the other end is bent towards the first positioning surface 1212 and abuts against the first positioning surface 1212. The connecting body 113 is provided with a connecting hole 1131, which is rotatably sleeved on the rotating shaft 122. The limiting body 111 is provided with a clamping joint 1111. Further referring to the state I shown in Figure 7 During the stretching deformation of the elastic body 112, the clamping joint 1111 passes through the first gap 1213 and is clamped with the inner teeth 331.

[0083] Specifically, the two sides of the inner teeth 331 are provided with a first inclined surface and a second inclined surface. The first inclined surface has a smaller inclination than the second inclined surface. When the clamping joint 1111 rotates in the first direction, it can slide along the first inclined surface to the adjacent inner teeth 331. During this process, the deformation amount of the elastic body 112 is utilized to make the limiting body 111 continuously swing. At the same time, the receiving groove 1211 is used to accommodate the locking member 11, so that the structure of the locking part 1 is more compact, and the receiving groove 1211 can also limit the movement range of the locking member 11.

[0084] In some embodiments, as shown in Figure 4 The inner wall of the first driving groove 114 comprises a driving surface 1141. The rotating disc 121 is provided with a second driving groove 1214. Further referring to the state II shown in Figure 7 The side wall of the second driving groove 1214 comprises a first position 41 and a second position 42 which are arranged at intervals. Further referring to the state III shown in Figure 6 The driving part 2 further comprises a second driving column 22 which extends into the second driving groove 1214. When the second driving column 22 abuts against the first position 41, the rotating disc 121 can be driven to rotate in the first direction through the first position 41. When the second driving column 22 abuts against the second position 42, the rotating disc 121 can be driven to rotate in the second direction through the second position 42. At the same time, during the movement of the second driving column 22 from the first position 41 to the second position 42, the first driving column 21 drives the limiting body 111 to separate from the inner teeth 331 through the driving surface 1141.

[0085] That is, when the driving part 2 rotates in the second direction, the limiting body 111 is first separated from the inner teeth 331 under the driving of the first driving column 21, and then the rotating disc 121 rotates again under the driving of the second driving column 22. Thus, the effect of unlocking first and then rotating of the locking part 1 is realized, which simplifies the operation of the user on the tightness adjusting device and avoids the influence of the locking member 11 on the rotation of the rotating body 12.

[0086] Further, further referring to Figure 7 As shown in state I, when the rotating disc 121 rotates in the first direction, the first driving column 21 is spaced from the inner wall of the first driving groove 114. That is, the first driving column 21 does not contact the sidewall of the first driving groove 114, so as to avoid the driving part 2 conducting the force to the inner teeth 331 through the locking part 11. The friction between the locking part 1 and the inner teeth 331 is reduced.

[0087] In some embodiments, as shown in Figure 6 The driving part 2 further comprises a cover 23, the cover 23 is rotationally connected with the mounting base 31, and the first driving column 21 and the second driving column 22 are protruded from the cover 23. Further referring to Figure 7 As shown in

[0088] When the user rotates the driving part 2 in the second direction to a predetermined angle, the driving part 2 is loosened. In this form, the elastic body 112 drives the limiting body 111 to move towards the inner teeth 331, so that the driving surface 1141 can drive the cover 23 through the first driving column 21 to rotate reversely (rotate in the first direction) by a small angle, at this time, the second driving column 22 moves from the second position 42 to the third position 43.

[0089] Specifically, the second driving groove 1214 is an arc-shaped groove, which extends towards the cover 23 and along the center of the rotating disc 121, and sequentially comprises the first position 41, the third position 43 and the second position 42 which are arranged at intervals in the extension direction of the arc-shaped groove. Thus, the locking part 11 can be reset in time, avoiding the elastic force of the elastic body 112 acting on the rotating disc 121. It is helpful for the tension adjusting device to be self-locked in time.

[0090] In some embodiments, as shown in Figure 6 The driving part 2 further comprises a first positioning column 24, the first positioning column 24 is protruded from the center of the cover 23. Further referring to Figure 2 and Figure 5 The tension adjusting device further comprises a positioning part 5, the positioning part 5 has a second positioning surface 51, the mounting base 31 has a third positioning surface 311 which is oppositely arranged with the second positioning surface 51, and the third positioning surface 311 is located on the side of the mounting base 31 away from the cover 23. The mounting base 31 further comprises a sleeve 312. Further referring to Figure 4 As shown in

[0091] Preferably, the second positioning surface 51 and the third positioning surface 311 are in a separable state. That is, after the driving part 2 is fixed with the positioning part 5, a slight movement in the axial direction of the first positioning column 24 can be made. This makes the driving part 2 and the positioning part 5 fixed with the mounting seat 31, while ensuring that the driving part 2 and the positioning part 5 can rotate together, so as to reduce the friction between the driving part 2, the positioning part 5 and the mounting seat 31.

[0092] Optionally, as shown in Figures 4-5 , the tension adjusting device further comprises a washer 6. The washer 6 is arranged in the first through hole 1215 and abuts against the mounting plate 231. The washer 6 can play a buffering role in the axial movement of the driving part 2 and the positioning part 5.

[0093] In some embodiments, as shown in Figure 5 , the mounting hole 33 comprises a first mounting hole 332 and a second mounting hole 333 which are in communication with each other in the axial direction. The sidewall of the first mounting hole 332 is provided with a plurality of internal teeth 331, and the sleeve 312 is protruded at the center of the bottom of the second mounting hole 333. Further referring to Figure 2 , the second mounting hole 333 is laterally provided with a second notch 334. The rotating body 12 is arranged in the first mounting hole 332, and the driving gear 13 is arranged in the second mounting hole 333, and part of the teeth of the driving gear 13 are located outside the second notch 334 and engaged with the rack 321. Specifically, the number of the second notch 334 is two and corresponds to two racks 321 respectively. The driving gear 13 is engaged with the two racks 321 by means of the two second notches 334.

[0094] In some embodiments, as shown in Figure 3 , the positioning part 5 comprises a screw 52 and a positioning member 53. The positioning member 53 comprises a second positioning column 531 and a positioning sheet 532. The second positioning column 531 is provided with a second through hole 5311, and the positioning sheet 532 is provided with a second positioning surface 51. Further referring to Figure 5 , the second positioning column 531 extends into the sleeve 312 and abuts against the first positioning column 24. One end of the screw 52 is connected with the positioning member 53, and the other end is threadedly connected with the first positioning column 24 through the second through hole 5311. The second positioning column 531 in the embodiment can provide positioning for the rotation of the driving gear 13 together with the first positioning column 24, so as to ensure that the driving gear 13 can be stably engaged with the two racks 321.

[0095] Further, the number of accommodating grooves 1211 is multiple and evenly distributed around the center of the rotating disc 121. The number of locking members 11 is multiple and correspondingly arranged in the multiple accommodating grooves 1211. The number of first driving columns 21 is multiple and extends into the corresponding first driving grooves 114. For example, the number of locking members 11 and first driving columns 21 can be three. Thus, the force on the locking part 1 in the axial direction is more balanced, and the stability of the locking part 1 is ensured.

[0096] In some embodiments, as shown in Figures 5-7 The mounting seat 31 has an arc-shaped guide groove 313 outside the mounting hole 33. The cover 23 includes a mounting plate 231 and a flange 232 arranged at the edge of the mounting plate 231. The first positioning column 24, the first driving column 21 and the second driving column 22 are arranged on the mounting plate 231. The flange 232 extends into the arc-shaped guide groove 313 and rotates along the arc-shaped guide groove 313.

[0097] Specifically, the number of arc-shaped guide grooves 313 in the embodiment is two and located on both sides of the mounting hole 33. The two arc-shaped guide grooves 313 curve away from the mounting hole 33. The arc-shaped guide grooves 313 in the embodiment cooperate with the flange 232 to guide the rotation of the driving part 2. The edge of the flange 232 can also be in contact with the bottom of the arc-shaped guide groove 313 to limit the axial position of the driving part 2.

[0098] In an alternative implementation, the tightness adjusting device in the above embodiment can be applied to a head-mounted device. The head-mounted device can be smart glasses for realizing virtual reality or augmented reality.

[0099] In the head-mounted device in the embodiment, the locking part 1 of the tightness adjusting device is rotationally connected with the mounting seat 31, and the driving part 2 is configured to drive the locking part 1 to rotate to drive the adjusting belt 32 to move through the engagement of the driving gear 13 and the rack 321. Thus, the limiting body 111 abuts on the inner teeth 331 by the elastic force of the elastic body 112, so that the locking of the locking part 1 on the adjusting belt 32 is more stable, and the head-mounted device can be stably bound on the head. Furthermore, when the driving part 2 rotates in the first direction, the elastic force of the elastic body 112 enables the limiting body 111 to slide along the inner teeth 331. When the driving part 2 rotates in the second direction, the limiting body 111 can be separated from the inner teeth 331 through the cooperation of the first driving column 21 and the first driving groove 114. The user can directly rotate the driving part 2 to adjust the tightness of the adjusting belt 32. Thus, the adjustment mode is simplified.

[0100] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tension adjustment device, characterized in that: The tightness adjusting device comprises: a body (3) comprising a mounting seat (31) and an adjusting belt (32), the adjusting belt (32) comprising a rack (321), the inner wall of the mounting seat (31) being provided with a plurality of internal teeth (331); and a locking part (1) rotatably arranged on the mounting seat (31), the locking part (1) comprising a rotating body (12), a driving gear (13) and a locking piece (11), the driving gear (13) being engaged with the rack (321) and driving the adjusting belt (32) to move, the locking piece (11) being arranged on the rotating body (12) and comprising a limiting body (111) and an elastic body (112), the limiting body (111) being operatively engaged with the internal teeth (331) through the elastic force of the elastic body (112); the locking part (1) is rotated along a first direction, the limiting body (111) slides on the plurality of internal teeth (331), the locking part (1) is rotated along a second direction by a predetermined angle, the limiting body (111) is separated from the internal teeth (331) and the elastic body (112) is bent and deformed.

2. The slack adjust device of claim 1, wherein Further comprising a driving part (2) configured to drive the locking part (1) to rotate and comprising a first driving column (21), the limiting body (111) having a first driving slot (114), the first driving column (21) extending into the first driving slot (114).

3. The slack adjust device of claim 2, wherein The rotating body (12) comprises a rotating disc (121) and a rotating shaft (122); The locking piece (11) further comprises a connecting body (113) connected between the limiting body (111) and the elastic body (112), the connecting body (113) being rotatably connected with the rotating disc (121) through the rotating shaft (122); The first driving column (21) abuts against the side wall of the first driving slot (114) and drives the limiting body (111) to rotate away from the internal teeth (331).

4. The slack adjust device of claim 3, wherein The rotating disc (121) is provided with a containing groove (1211), the rotating shaft (122) is protruded from the bottom surface of the containing groove (1211), the containing groove (1211) comprises a first positioning surface (1212) and a first notch (1213), the first notch (1213) is located at the edge of the rotating disc (121), one end of the elastic body (112) is connected with the connecting body (113), and the other end is bent towards the first positioning surface (1212) and abuts against the first positioning surface (1212); The connecting body (113) is provided with a connecting hole (1131), the connecting hole (1131) is rotatably sleeved on the rotating shaft (122), and the limiting body (111) comprises a clamping joint (1111); The elastic body (112) is stretched and deformed, and the clamping joint (1111) is engaged with the internal teeth (331) through the first notch (1213).

5. The tightness adjusting device according to claim 3, wherein The rotating disc (121) is provided with a second driving groove (1214), and the sidewall of the second driving groove (1214) is provided with a first position (41) and a second position (42) which are arranged at intervals. The driving part (2) further comprises a second driving column (22) which extends into the second driving groove (1214). When the rotating disc (121) rotates in the first direction, the second driving column (22) is located at the first position (41), and when the rotating disc (121) rotates in the second direction, the second driving column (22) is located at the second position (42).

6. The slack adjust device of claim 5, wherein When the rotating disc (121) rotates in the first direction, the first driving column (21) is spaced from the inner wall of the first driving groove (114).

7. The slack adjust device of claim 5, wherein The driving part (2) further comprises a cover body (23) which is rotationally connected with the mounting seat (31), and the first driving column (21) and the second driving column (22) are protruded from the cover body (23). The second driving groove (1214) further comprises a third position (43) which is located between the first position (41) and the second position (42). The elastic body (112) drives the limiting body (111) to move towards the inner teeth (331), and the inner wall of the first driving groove (114) drives the cover body (23) to rotate through the first driving column (21), and the second driving column (22) moves to the third position (43).

8. The slack adjust device of claim 7, wherein, The driving part (2) further comprises a first positioning column (24) which is protruded from the center of the cover body (23). The tightness adjusting device further comprises a positioning part (5). The mounting seat (31) further comprises a sleeve (312), and the center of the rotating disc (121) is provided with a first through hole (1215), the rotating disc (121) is rotatably sleeved on the sleeve (312) through the first through hole (1215), and the first positioning column (24) penetrates through the sleeve (312) and is connected with the positioning part (5).

9. The slack adjust device of claim 8, wherein, The mounting seat (31) is provided with a mounting hole (33) which comprises a first mounting hole (332) and a second mounting hole (333) which are in communication in the axial direction, the sidewall of the first mounting hole (332) is provided with a plurality of inner teeth (331), the sidewall of the second mounting hole (333) is provided with a second notch (334), and the sleeve (312) is protruded from the center of the bottom of the second mounting hole (333). The rotating body (12) is arranged in the first mounting hole (332), and the driving gear (13) is arranged in the second mounting hole (333), and part of the teeth of the driving gear (13) are located outside the second notch (334) and are engaged with the rack (321).

10. The slack adjust device of claim 8, wherein, The positioning part (5) comprises: a screw (52); a positioning piece (53) which comprises a second positioning column (531) and a positioning sheet (532), and the second positioning column (531) is provided with a second through hole (5311). The second positioning column (531) extends into the sleeve (312) and abuts against the first positioning column (24), one end of the screw (52) is connected with the positioning piece (53), and the other end is threadedly connected with the first positioning column (24) through the second through hole (5311).

11. The slack adjust device of claim 4, wherein The number of the accommodation grooves (1211) is multiple and is uniformly distributed around the center of the rotating disc (121). The number of the locking pieces (11) is multiple and is one-to-one correspondingly arranged in the multiple accommodation grooves (1211), and the number of the first driving columns (21) is multiple and extends into the corresponding first driving grooves (114).

12. A head-mounted device, characterized by The head-mounted device comprises: The tightness adjusting device according to any one of claims 1-11.

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