CN219435139U - Telescopic band adjusting device and wearable equipment - Google Patents

Abstract

The utility model provides a telescopic band adjusting device and wearable equipment, and relates to the technical field of electronic equipment. According to the telescopic band adjusting device, noise generated by mutual touching and friction of the clamping teeth and the tooth-shaped grooves can be avoided, so that a user can obtain better experience, and after the telescopic band adjusting device is adjusted in place, the elastic arms restore to the original state under the action of elasticity of the elastic arms and clamp the clamping teeth into the tooth-shaped grooves, so that the telescopic band of the wearable equipment is not easy to loosen.

Description

Telescopic band adjusting device and wearable equipment

Technical Field

The utility model relates to the technical field of electronic equipment, in particular to a telescopic band adjusting device and wearable equipment.

Background

The head-mounted display devices such as virtual reality head-mounted devices, augmented reality head-mounted devices and mixed reality head-mounted devices are generally composed of a host used for displaying image information to a user and a wearing part used for wearing the host on the head of the user, the wearing part generally comprises a binding band or side arms extending from two ends of the host to one side, the head-mounted display devices are worn behind the head of the user, the binding band or the side arms are located on two sides of the head of the user, in view of different head circumferences of different users, the head-mounted display devices are worn by different users in an adapting mode, and the wearing part generally further comprises an adjusting part used for adjusting the length of the binding band or the side arms, so that tightness of the head-mounted display devices when worn is convenient to adjust.

At present, the existing adjusting part mostly adopts a structure of a ratchet wheel and a gear, the ratchet wheel is matched with the installation shell through the latch arranged on the installation shell, but in the adjusting process, unnecessary noise is usually brought by continuous touching of the ratchet wheel and the latch arranged on the installation shell, and the user experience is poor.

Disclosure of Invention

The technical problem solved by the utility model is how to avoid noise generated when the tightness of the wearable equipment is regulated, so that a user obtains better experience.

In order to solve the technical problems, the embodiment of the utility model provides a telescopic band adjusting device, which comprises a supporting piece, a gear piece and an adjusting knob, wherein a tooth-shaped groove is formed in the supporting piece, the gear piece comprises a driving disc, an elastic arm used for deforming along the thickness direction of the driving disc is arranged on the driving disc, a latch used for being clamped with the tooth-shaped groove is arranged at the tail end of the elastic arm, the adjusting knob comprises a knob body and a driving assembly, the knob body is used for being assembled on the driving disc, and the driving assembly is arranged on the knob body and used for driving the latch to be separated from the tooth-shaped groove.

Optionally, the drive assembly includes the drive buckle, the drive buckle sets up the knob body orientation on the terminal surface of one side in tooth-shaped groove, the latch is equipped with first inclined plane structure, the drive buckle is equipped with the second inclined plane structure, works as when the knob body forward rotates, the second inclined plane structure with first inclined plane structure looks butt and drive the latch breaks away from the tooth-shaped groove.

Optionally, in a radial direction of the driving disc, one driving buckle is disposed on one side of the latch, and the other driving buckle is disposed on the other side opposite to the latch.

Optionally, the driving assembly further comprises a protruding structure, the protruding structure is arranged on one side end face of the knob body, which is away from the tooth-shaped groove, a butt joint structure is further arranged on one side end face of the elastic arm, which is away from the tooth-shaped groove, a third inclined surface structure is arranged on the butt joint structure, a fourth inclined surface structure is arranged on the protruding structure, and when the knob body reversely rotates, the fourth inclined surface structure is mutually abutted with the third inclined surface structure and drives the tooth to be separated from the tooth-shaped groove.

Optionally, the elastic arms are provided in plurality, and the plurality of elastic arms are arranged at intervals along the circumferential direction of the driving disc.

Optionally, in the thickness direction of the driving disc, the maximum deformation amount of the elastic arm is larger than the groove depth of the tooth-shaped groove.

Optionally, the support member is provided with a through hole structure, the gear member further comprises a gear, the gear is coaxially arranged on one side end surface of the driving disc, which faces the tooth-shaped groove, and the gear is used for penetrating through the through hole structure.

Optionally, the telescopic belt adjusting device further comprises a telescopic belt, a sliding groove is formed in the end face of one side, facing away from the tooth-shaped groove, of the supporting piece, and the telescopic belt is arranged in the sliding groove and is used for being meshed with the gear.

Optionally, the telescopic strap includes first telescopic strap and second telescopic strap, first telescopic strap with the relative setting of second telescopic strap, be equipped with first rack on the first telescopic strap, be equipped with the second rack on the second telescopic strap, first rack be used for with the meshing of a part of gear, the second rack be used for with the meshing of another part that the gear is relative.

Compared with the prior art, the utility model has the following beneficial effects:

through set up the elastic arm that can take place deformation along driving disk thickness direction on the driving disk of gear spare, on the driving disk with the adjust knob assembly, when rotatory adjust knob, adjust knob's drive assembly can drive the elastic arm and take place deformation along the thickness direction of driving disk, and break away from the tooth form groove on the terminal latch of elastic arm and support piece, thereby can avoid latch and tooth form groove touching each other, rub and produce the noise, make the user can obtain better experience, after telescopic strap adjusting device adjusts in place, the effort that acts on the elastic arm withdraws, the elastic arm resumes the original form under self elastic effect and with the card tooth card income tooth form inslot, thereby can guarantee that the telescopic strap of wearable equipment is difficult for taking off.

In order to solve the technical problems, the utility model also provides wearable equipment, which comprises the telescopic band adjusting device.

The advantages of the wearable device in the prior art are the same as those of the telescopic band adjusting device, and are not described in detail herein.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic view of a telescopic belt adjusting device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a support member according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a gear member and an adjusting knob according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of the portion A of FIG. 3 in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic view of a gear member and an adjusting knob according to another embodiment of the present utility model;

FIG. 6 is an enlarged view of the portion B of FIG. 5 in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic view of an adjusting knob according to an embodiment of the present utility model;

fig. 8 is an enlarged view of fig. 7 at C in accordance with an embodiment of the present utility model.

Reference numerals illustrate:

1. a support; 11. a tooth-shaped groove; 12. a via structure; 2. a gear member; 21. a drive plate; 211. an elastic arm; 212. latch teeth; 2121. a first ramp structure; 213. a butt joint structure; 2131. a third bevel structure; 22. a gear; 3. an adjustment knob; 31. a knob body; 32. a drive assembly; 321. driving the buckle; 3211. a second ramp structure; 322. a bump structure; 3221. a fourth ramp structure; 4. a stretchable belt; 41. a first telescopic belt; 411. a first rack; 42. a second telescopic belt; 421. and a second rack.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it is to be understood that terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like indicate azimuth or positional relationships based on the azimuth or positional relationships shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

To solve the above-mentioned problems, an embodiment of the present utility model provides a telescopic band adjusting device, which includes a support member 1, a gear member 2 and an adjusting knob 3, wherein a toothed groove 11 is provided on the support member 1, the gear member 2 includes a driving plate 21, an elastic arm 211 for deforming along a thickness direction of the driving plate 21 is provided on the driving plate 21, a latch 212 for engaging with the toothed groove 11 is provided at a terminal end of the elastic arm 211, the adjusting knob 3 includes a knob body 31 and a driving assembly 32, the knob body 31 is configured to be assembled on the driving plate 21, and the driving assembly 32 is provided on the knob body 31 and is configured to drive the latch 212 to disengage from the toothed groove 11.

As shown in fig. 1, 2 and 3, in this embodiment, the supporting member 1 is a carrier for mounting the gear member 2, the adjusting knob 3 and related structures, and is in a strip shape and can be appropriately bent to adapt to the wearing requirements of different parts of the human body, the supporting member 1 can be made of plastic material, and a tooth-shaped groove 11 is disposed on a backward side end surface of the supporting member 1.

The driving plate 21 of the gear member 2 is arranged at the rear side of the supporting member 1, the driving plate 21 is integrally disc-shaped, a plurality of hollow structures are arranged at intervals along the circumferential direction in the middle of the driving plate 21, the elastic arms 211 are arranged in the hollow structures and are arranged along the circumferential direction, the whole driving plate is arc-shaped, the root parts of the elastic arms 211 are connected with the side walls of the hollow structures, and the end parts of the elastic arms 211 are suspended, so that the end parts of the elastic arms 211 can be subjected to external force

The elastic arm 211 deforms along the thickness direction of the driving disc 21 under the action, the end part of the elastic arm 211 faces to the end face of one 5 side of the supporting piece 1, and the shape of the clamping tooth 212 is matched with that of the tooth-shaped groove 11, so that the elastic arm can be clamped into the tooth-shaped groove 11 after the telescopic belt 4 is adjusted in place, and the telescopic belt 4 is prevented from loosening.

A knob mounting position is also arranged on the periphery of the tooth-shaped groove 11 on the support piece 1, an annular slideway is arranged on the knob mounting position, a knob body 31 of the adjusting knob 3 can be mounted on the knob mounting position after being assembled with the driving disk 21,

and can rotate along the annular slide way, the driving components 32 are distributed on the front and rear side end surfaces of the knob body 31, and can drive the end parts of the elastic arms 211 to deform in a direction away from the supporting piece 1 when the knob body 31 rotates forwards or backwards respectively, so that the clamping teeth 212 are separated from the tooth-shaped grooves 11.

By providing the elastic arms 211 capable of being deformed in the thickness direction of the driving disk 21 on the driving disk 21 of the gear member 2 in this way, the adjusting knob 3 is assembled to the driving disk 21, and when the adjusting knob 3 is rotated,

the drive assembly 32 of adjust knob 3 can drive elastic arm 211 and take place shape 5 along the thickness direction of drive disk 21 to break away from tooth 212 and the tooth groove 11 on the support piece 1 that will set up at the terminal of elastic arm 211, thereby can avoid tooth 212 and tooth groove 11 touching each other, friction and produce the noise, make the user can obtain better experience and feel, after telescopic band adjusting device adjusts in place, the effort that acts on elastic arm 211 withdraws, elastic arm 211 resumes the original form under the effect of self elasticity and with tooth 212 card income tooth groove 11, thereby can guarantee that the telescopic band 4 of wearable equipment is difficult for taking off.

0 optionally, the driving assembly 32 includes a driving buckle 321, the driving buckle 321 is disposed on an end surface of the knob body 31 facing the tooth-shaped groove 11, the latch 212 is provided with a first inclined surface structure 2121, the driving buckle 321 is provided with a second inclined surface structure 3211, and when the knob body 31 rotates forward, the second inclined surface structure 3211 and the first inclined surface structure 2121 abut against each other and drive the latch 212 to separate from the tooth-shaped groove 11.

As shown in fig. 2, 3, 7 and 8, in this embodiment, the position of the knob body 31 corresponding to the elastic arm 5 is hollowed out to form an accommodating space for accommodating the elastic arm 211, a projection facing the driving disk 21 is disposed at the inner side of the accommodating space, a part of the projection, which is close to the driving disk 21, is folded to one side to form a driving buckle 321, and the folded edge of the driving buckle 321 abuts against the elastic arm 211 to clamp the knob body 31 and the driving disk 21.

Wherein, latch 212 adopts the cross-section shape to be right triangle's structure, and its one side terminal surface that keeps away from the root is right angle face, and its one side terminal surface towards the root is first inclined plane structure 2121, and the hem of drive buckle 321 is equipped with second inclined plane structure 3211 towards the part of latch 212, and first inclined plane structure 2121 and second inclined plane structure 3211 mutually match, because drive buckle 321 is fixed on knob body 31, when the forward rotation knob body 31, can drive the tip of elastic arm 211 and take place deformation towards the direction of keeping away from support piece 1 after second inclined plane structure 3211 and first inclined plane structure 2121 butt to disengage latch 212 from tooth form groove 11.

It should be noted that, the forward rotation of the knob body 31 is a relative term, which may be either clockwise rotation or counterclockwise rotation, and may be specifically determined according to the installation direction of the elastic arm 211 on the driving disk 21, and when the elastic arm 211 is installed in the clockwise direction, the forward rotation of the knob body 31 is the clockwise rotation, and when the elastic arm 211 is installed in the counterclockwise direction, the forward rotation of the knob body 31 is the counterclockwise rotation, for example.

It should be noted that, the driving buckle 321 may be disposed at a position on the knob body 31 corresponding to the root portion of the elastic arm 211, or may be disposed at a position on the knob body 31 corresponding to the end portion of the elastic arm 211, or at a position on the knob body 31 corresponding to any position of the elastic arm 211, and preferably, in this embodiment, in order to enable the latch 212 to be disengaged from the tooth-shaped groove 11 more easily, the driving buckle 321 may be disposed at a position corresponding to the end portion of the elastic arm 211, so that the elastic arm 211 may be deformed more easily by increasing the force arm.

In this way, by arranging the driving buckle 321 on the end face of one side of the knob body 31 facing the tooth-shaped groove 11, and arranging the first inclined surface structure 2121 on the latch 212, and arranging the second inclined surface structure 3211 on the driving buckle 321, when the knob body 31 rotates forward, the second inclined surface structure 3211 and the first inclined surface structure 2121 are mutually abutted and drive the latch 212 to separate from the tooth-shaped groove 11, thereby ensuring that the adjusting knob 3 rotates smoothly in one direction, and avoiding the contact and friction between the latch 212 and the tooth-shaped groove 11 to generate noise.

Alternatively, one driving buckle 321 is disposed at one side of the latch 212 in the radial direction of the driving disk 21, and the other driving buckle 321 is disposed at the other side opposite to the latch 212.

As shown in fig. 3 and 4, in order to prevent the latch 212 from being disengaged from the tooth-shaped groove 11 smoothly due to uneven stress on one side of the elastic arm 211 near the center and the other side far from the center, in this embodiment, each of the elastic arms 211 is provided with a driving buckle 321 on each of the inner and outer sides in the radial direction, so that when the knob body 31 is rotated, the two driving buckles 321 can apply forces to the elastic arms 211 from the two sides of the elastic arms 211 respectively, so that the latch 212 and the tooth-shaped groove 11 cannot be disengaged smoothly due to the inclination of the elastic arms 211 to one side can be avoided, and the operation of the telescopic band adjusting device is smoother.

Optionally, the driving assembly 32 further includes a protrusion structure 322, the protrusion structure 322 is disposed on a side end surface of the knob body 31 facing away from the tooth-shaped groove 11, a docking structure 213 is further disposed on a side end surface of the elastic arm 211 facing away from the tooth-shaped groove 11, a third bevel structure 2131 is disposed on the docking structure 213, a fourth bevel structure 3221 is disposed on the protrusion structure 322, and when the knob body 31 rotates reversely, the fourth bevel structure 3221 and the third bevel structure 2131 are mutually abutted and drive the latch 212 to be separated from the tooth-shaped groove 11.

As shown in fig. 5 and 6, in this embodiment, a protruding structure 322 protruding backward is further provided on the edge of the hollowed portion of the knob body 31 on the backward side end surface, and correspondingly, a docking structure 213 is provided on the backward side end surface of the elastic arm 211 at a position corresponding to the latch 212, where the docking structure 213 is hooked, and when the adjusting knob 3 is assembled with the gear member 2, the forward inner wall of the docking structure 213 just contacts with the backward outer wall of the protruding structure 322.

When the adjusting knob 3 is rotated, the protrusion structure 322 can be more conveniently inserted into the docking structure 213, and the inner wall of the docking structure 213 and the outer wall of the protrusion structure 322 are respectively provided in a slant shape, i.e., the third slant structure 2131 and the fourth slant structure 3221.

Thus, when the knob body 31 is reversely rotated, the third inclined surface structure 2131 of the abutting structure 213 and the fourth inclined surface structure 3221 of the protrusion structure 322 abut against each other, so that the end of the elastic arm 211 can be pried toward the side away from the supporting member 1, the latch 212 on the elastic arm 211 is disengaged from the tooth-shaped groove 11 on the supporting member 1, thereby ensuring smooth rotation of the adjusting knob 3 in the other direction, and further avoiding noise generated by the contact and friction of the latch 212 and the tooth-shaped groove 11.

Alternatively, the plurality of elastic arms 211 are provided, the plurality of elastic arms 211 are arranged at intervals along the circumferential direction of the driving disk 21, and the maximum deformation amount of the elastic arms 211 is larger than the groove depth of the tooth-shaped groove 11 in the thickness direction of the driving disk 21.

As shown in fig. 3 and 5, since the driving disc 21 is a circular disc body, in order to ensure that the latch 212 on each elastic arm 211 is smoothly clamped into the tooth-shaped groove 11 when the driving disc rotates to any position, and the anti-loosening forces applied in all directions are more balanced, in this embodiment, a plurality of elastic arms 211 are arranged on the driving disc 21 at intervals along the circumferential direction, correspondingly, a set of driving components 32 matched with each elastic arm 211 are respectively arranged on the position, corresponding to each elastic arm 211, on the adjusting knob 3, and when the adjusting knob 3 is rotated forward or reversely, the driving components 32 corresponding to each elastic arm 211 synchronously drive each elastic arm 211 to deform towards the side far away from the supporting piece 1, so that the latch 212 on each elastic arm 211 is separated from the tooth-shaped groove 11, after the telescopic belt 4 is adjusted in place, the external force applied to the adjusting knob 3 is removed, each elastic arm 211 is restored to the natural state, and the corresponding latch 212 is clamped into the tooth-shaped groove 11, so that the telescopic belt 4 can be prevented from being loosened.

It should be noted that, since the elastic arm 211 is a movable member, damage easily occurs during use, and in order to improve the service life of the elastic arm under the premise of not affecting the elastic deformation performance, in this embodiment, a reinforcing rib may be further disposed on the elastic arm 211, and the reinforcing rib may be disposed along the circumferential direction of the driving disc 21, or may be disposed along the radial direction of the driving disc 21, and the reinforcing rib may be disposed on an end surface of the elastic arm 211 facing the support member 1, or may be disposed on an end surface of a side facing away from the support member 1, which is not limited herein.

In addition, as shown in fig. 2 and 3, in order to make the latch 212 separate from the tooth-shaped groove 11 smoothly, in this embodiment, after the driving structure on the adjusting knob 3 abuts against the first inclined surface structure 2121 or the third inclined surface structure 2131 on the elastic arm 211, the maximum distance that the end of the elastic arm 211 is driven to move away from the supporting member 1 should be greater than the groove depth of the tooth-shaped groove 11, so that the latch 212 on the elastic arm 211 is completely separated from the tooth-shaped groove 11, and noise generated by friction between the latch 212 and the tooth-shaped groove 11 is avoided.

Optionally, the support 1 is provided with a through hole structure 12, the gear member 2 further comprises a gear 22, the gear 22 is coaxially arranged on the end surface of the side of the driving disc 21 facing the tooth-shaped groove 11, and the gear 22 is used for penetrating the through hole structure 12.

As shown in fig. 2 and 3, in this embodiment, the support member 1 is further provided with a through hole structure 12 at the center of the tooth-shaped groove 11, the through hole structure 12 is a circular through hole, a gear 22 is disposed on the front side end surface of the driving disk 21, the gear 22 and the driving disk 21 are coaxially disposed and pass through the through hole structure 12 on the support member 1, a shaft hole penetrating axially is further disposed on the gear 22, a forward pin shaft is disposed on the knob body 31 of the adjusting knob 3, and when the adjusting knob 3 is assembled with the gear member 2, the pin shaft can penetrate into the shaft hole.

Thus, by arranging the through hole structure 12 on the support member 1, the gear 22 of the gear member 2 is coaxially arranged on the end face of the side of the driving disc 21 facing the tooth-shaped groove 11 and penetrates through the through hole structure 12, and the gear 22 arranged on the front side of the support member 1 can be rotated by rotating the driving disc 21 on the rear side of the support member 1, so that the telescopic belt 4 arranged on the front side of the support member 1 is driven to move, and the effect of adjusting the tightness of the telescopic belt 4 is realized.

Optionally, the telescopic band adjusting device further comprises a telescopic band 4, a sliding groove is formed in an end face of one side, facing away from the toothed groove 11, of the supporting piece 1, the telescopic band 4 is arranged in the sliding groove and is used for being meshed with the gear 22, the telescopic band 4 comprises a first telescopic band 41 and a second telescopic band 42, the first telescopic band 41 and the second telescopic band 42 are oppositely arranged, a first rack 411 is arranged on the first telescopic band 41, a second rack 421 is arranged on the second telescopic band 42, the first rack 411 is used for being meshed with one part of the gear 22, and the second rack 421 is used for being meshed with the other part of the gear 22.

As shown in fig. 1, 2 and 3, in the present embodiment, the first telescopic belt 41 and the second telescopic belt 42 are similar in structure, the parts of the two telescopic belts 4 located in the supporting member 1 are each provided with a bar-shaped opening, the inner walls of the bar-shaped openings are respectively provided with racks capable of being meshed with the gear 22, the two telescopic belts 4 are arranged left and right, and the difference is that the racks of one telescopic belt 4 are arranged on the upper inner wall of the bar-shaped opening, the racks of the other telescopic belt 4 are arranged on the lower inner wall of the bar-shaped opening, the telescopic belt 4 arranged on the right side can be referred to as a first telescopic belt 41, the telescopic belt 4 arranged on the left side can be referred to as a second telescopic belt 42, correspondingly, the racks on the first telescopic belt 41 are referred to as a first rack 411, and the racks on the second telescopic belt 42 are referred to as a second rack 421, wherein the first rack 411 is meshed with the lower part of the gear 22, and the second rack 421 is meshed with the upper part of the gear 22.

It should be noted that, the portions of the first telescopic belt 41 and the second telescopic belt 42 located in the support member 1 are placed in tandem, the front-rear sequence thereof can be randomly interchanged, and the positions of the first rack 411 of the first telescopic belt 41 and the positions of the second rack 421 of the second telescopic belt 42 can be interchanged as required, which is not limited herein.

Another embodiment of the utility model provides a wearable device comprising a telescopic strap adjustment apparatus as above.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims (8)

1. The telescopic belt adjusting device is characterized by comprising a supporting piece (1), a gear piece (2) and an adjusting knob (3), wherein a tooth-shaped groove (11) is formed in the supporting piece (1), the gear piece (2) comprises a driving disc (21), an elastic arm (211) used for deforming along the thickness direction of the driving disc (21) is arranged on the driving disc (21), a latch (212) used for being clamped with the tooth-shaped groove (11) is arranged at the tail end of the elastic arm (211), the adjusting knob (3) comprises a knob body (31) and a driving assembly (32), the knob body (31) is used for being assembled on the driving disc (21), and the driving assembly (32) is arranged on the knob body (31) and used for driving the latch (212) to be separated from the tooth-shaped groove (11).

The driving assembly (32) comprises a driving buckle (321), the driving buckle (321) is arranged on one side end surface of the knob body (31) facing the tooth-shaped groove (11), the clamping tooth (212) is provided with a first inclined surface structure (2121), the driving buckle (321) is provided with a second inclined surface structure (3211), and when the knob body (31) rotates forwards, the second inclined surface structure (3211) and the first inclined surface structure (2121) are mutually abutted and drive the clamping tooth (212) to be separated from the tooth-shaped groove (11);

the driving assembly (32) further comprises a protruding structure (322), the protruding structure (322) is arranged on one side end face of the knob body (31) deviating from the tooth-shaped groove (11), the elastic arm (211) is further provided with a butt joint structure (213) on one side end face of the tooth-shaped groove (11), the butt joint structure (213) is provided with a third inclined surface structure (2131), the protruding structure (322) is provided with a fourth inclined surface structure (3221), and when the knob body (31) reversely rotates, the fourth inclined surface structure (3221) and the third inclined surface structure (2131) are mutually abutted and driven, and the clamping teeth (212) are separated from the tooth-shaped groove (11).

2. Telescopic belt adjusting device according to claim 1, wherein one of the drive catches (321) is arranged on one side of the latch (212) and the other drive catch (321) is arranged on the opposite side of the latch (212) in the radial direction of the drive disc (21).

3. Telescopic belt adjustment according to any one of claims 1 to 2, wherein a plurality of said resilient arms (211) are provided, a plurality of said resilient arms (211) being arranged at intervals along the circumference of said drive disc (21).

4. Telescopic belt adjustment according to any one of claims 1 to 2, characterized in that the maximum deformation of the resilient arms (211) in the thickness direction of the drive disc (21) is greater than the groove depth of the toothed groove (11).

5. Telescopic belt adjusting device according to any one of claims 1 to 2, characterized in that the support element (1) is provided with a through-hole structure (12), the gear element (2) further comprises a gear wheel (22), the gear wheel (22) is coaxially arranged on the end face of the drive disc (21) facing the toothed groove (11), and the gear wheel (22) is arranged to pass through the through-hole structure (12).

6. Telescopic belt adjusting device according to claim 5, further comprising a telescopic belt (4), wherein a sliding groove is provided on the end surface of the support (1) facing away from the toothed groove (11), and the telescopic belt (4) is arranged in the sliding groove and is intended to engage with the gear wheel (22).

7. The telescopic belt adjusting device according to claim 6, wherein the telescopic belt (4) comprises a first telescopic belt (41) and a second telescopic belt (42), the first telescopic belt (41) is arranged opposite to the second telescopic belt (42), a first rack (411) is arranged on the first telescopic belt (41), a second rack (421) is arranged on the second telescopic belt (42), the first rack (411) is used for being meshed with one part of the gear (22), and the second rack (421) is used for being meshed with the other part opposite to the gear (22).

8. Wearable device, characterized by comprising a telescopic belt adjustment device according to any of claims 1 to 7.