CN114304825B - Wearable equipment and wear locking adjustment structure thereof - Google Patents

Abstract

The present invention discloses a wearable device and a wearing locking adjustment structure thereof. When adjusting the state, the user only needs to turn the knob unit with one hand. During the process of rotating the knob unit by a first angle, since the end of the limiting groove is bent inwardly along the direction close to the axis of the adjusting unit, the knob unit squeezes the limiting part through the limiting groove, causing the slider to slide inwardly along the radial direction of the adjusting unit, so that the elastic unit is compressed; until the knob unit rotates by the first angle, the limiting part abuts against the end of the limiting groove, and the slider does not abut against the inner wall of the shell, and when the knob unit continues to rotate, the limiting part abuts against the end of the limiting groove, so that the adjusting unit and the knob unit are relatively locked, that is, the adjusting unit can rotate synchronously with the knob unit, thereby driving the telescopic belt to extend or retract into the shell, thereby achieving the purpose of adjusting the wearing tightness with one hand, and optimizing the user's usage experience.

Description

Wearable device and wearing locking adjustment structure thereof

Technical Field

The present invention relates to the technical field of structures of wearable devices, and in particular to a wearable device and a wearing locking and adjusting structure thereof.

Background Art

Wearable devices refer to electronic products that are worn on the user, such as VR glasses and smart glasses worn on the head, smart watches and smart watches worn on the wrist, etc.

Among them, for head-mounted electronic devices such as VR glasses and smart glasses, it is generally necessary to configure a head-mounted structure to fix the main body of the head-mounted electronic device on the head. At present, the head-mounted structure is mainly divided into ordinary strap type and mechanical type; the ordinary strap type structure is mainly composed of two side straps, and the two side straps are adjusted by Velcro or buckles to adjust the size of the headband so that the headband can fit the head well; the mechanical structure generally includes gears and racks, and is accompanied by ratchet teeth as a restriction.

For an ordinary strap-type structure, when putting on or loosening the straps, both hands are required to operate the two side straps respectively; for a mechanical structure, when putting on or loosening the straps, one hand is usually required to press the operating piece to release the lock of the ratchet teeth, and then use the other hand to adjust the relative position of the gear and the rack to complete the putting on or loosening action.

Obviously, both of the above structures require two-handed operation, resulting in a poor user experience.

Summary of the invention

The purpose of the present invention is to provide a wearable device and a wearing locking and adjusting structure thereof to solve the problem of poor user experience of current wearable devices.

To achieve this object, the present invention adopts the following technical solutions:

A locking and adjusting structure of a wearable device comprises a shell; a retractable belt is slidably connected to the shell; an adjusting unit is rotatably connected inside the shell, and the adjusting unit is used to drive the retractable belt to extend or retract into the shell;

The adjusting unit is slidably connected with a slider along its radial direction, and an elastic unit is arranged between the slider and the adjusting unit, one end of the elastic unit is fixedly connected to the adjusting unit, and the other end of the elastic unit is fixedly connected to the slider, so as to press the slider onto the inner wall of the housing;

The housing is rotatably connected to a knob unit outside the slider, a limiting portion is convexly provided on one side of the slider close to the knob unit, a limiting groove is provided on the knob unit corresponding to the position of the limiting portion, and the limiting groove can be movably sleeved outside the limiting portion;

Both ends of the limiting groove are bent inwardly in a direction close to the axis of the adjusting unit. When the knob unit rotates by a first angle, one end of the limiting groove abuts against the limiting portion, and the elastic unit is compressed.

Optionally, a sliding groove is provided on an end surface of the adjustment unit close to the knob unit, the sliding block is slidably connected to the sliding groove, and one end of the elastic unit is fixedly connected to a groove wall of the sliding groove.

Optionally, a first latching tooth portion is formed at one end of the slider away from the axis of the adjusting unit, and a second latching tooth portion is disposed around the first latching tooth portion on the housing;

When the elastic unit is not compressed, the first latching tooth portion is engaged with the second latching tooth portion.

Optionally, a gap between the sliding block and the sliding groove is smaller than a gap between the first locking tooth portion and the second locking tooth portion.

Optionally, the elastic unit is a compression spring.

Optionally, the limiting groove is an arc-shaped groove.

Optionally, a gear portion is formed at one end of the adjustment unit away from the knob unit, and a rack portion is provided at a position of the retractable belt corresponding to the gear portion, and the gear portion is meshed with the rack portion.

Optionally, the telescopic belt comprises a first telescopic belt and a second telescopic belt, an end portion of the first telescopic belt extending into the shell and an end portion of the second telescopic belt extending into the shell are both provided with an opening, and the rack portion is formed on an inner wall of one side of the opening;

Wherein, the rack portion arranged on the first telescopic belt and the rack portion arranged on the second telescopic belt are respectively arranged on both sides of the rack portion.

Optionally, the knob unit is further connected to a fixing member via a connecting member, and the fixing member passes through the shell to mount the knob unit on the shell; and the adjustment unit is sleeved outside the fixing member.

A wearable device comprises the locking and adjusting structure as described above.

Compared with the prior art, the present invention has the following beneficial effects:

The wearable device and the wearing locking adjustment structure thereof provided by the present invention, when adjusting the state, the user only needs to turn the knob unit with one hand, and in the process of rotating the knob unit to the first angle, since the end of the limiting groove is bent inwardly along the direction close to the axis of the adjusting unit, the knob unit squeezes the limiting part through the limiting groove, so that the slider slides inward, so that the elastic unit is compressed; until the knob unit rotates to the first angle, the limiting part abuts with the end of the limiting groove, the slider does not abut with the inner wall of the shell, and when the knob unit continues to rotate, the limiting part can abut with the end of the limiting groove, so that the adjusting unit and the knob unit can be relatively locked, that is, the adjusting unit can rotate synchronously with the knob unit, thereby driving the retractable belt to extend or retract the shell. In summary, in the above-mentioned adjustment process, the user first rotates the knob unit to the first angle to release the locking between the elastic unit and the shell, and then rotates the knob unit to drive the adjusting unit to rotate synchronously, thereby driving the retractable belt to extend or retract the shell, so as to achieve the purpose of adjusting the wearing tightness with one hand, and optimize the user's use experience.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

FIG1 is a schematic diagram of the overall structure of a locking and adjusting structure provided by an embodiment of the present invention;

FIG2 is a schematic diagram of a first exploded structure of a locking and adjusting structure provided by an embodiment of the present invention;

FIG3 is a schematic diagram of a second exploded structure of the locking and adjusting structure provided by an embodiment of the present invention;

FIG4 is a schematic diagram of the installation of the adjustment unit and the slider according to an embodiment of the present invention;

FIG5 is a schematic structural diagram of a knob unit according to an embodiment of the present invention;

FIG6 is a schematic diagram of a first partial structure of a locking adjustment structure provided in an embodiment of the present invention;

FIG7 is a schematic diagram of a partial enlarged structure at A in FIG6;

FIG8 is a schematic structural diagram of a telescopic belt according to an embodiment of the present invention;

FIG9 is a schematic diagram of the structure of the telescopic belt movement principle according to an embodiment of the present invention;

FIG10 is a schematic diagram of a first structure of a rear housing according to an embodiment of the present invention;

FIG. 11 is a second schematic structural diagram of the rear housing according to the embodiment of the present invention.

Illustrations: 11, first telescopic belt; 12, second telescopic belt; 13, rack portion;

20. Adjustment unit; 21. Slideway; 22. Gear unit;

30. Sliding block; 31. Position limiting portion; 32. First tooth portion; 40. Elastic unit; 50. Knob unit; 51. Position limiting groove; 52. Fixing member;

60. front housing; 61. second latching tooth portion; 70. rear housing; 71. slideway groove; 72. first slideway hole; 73. second slideway hole; 80. support member.

DETAILED DESCRIPTION

In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

Please refer to Figures 1 to 11, Figure 1 is a schematic diagram of the overall structure of the locking adjustment structure provided in an embodiment of the present invention, Figure 2 is a schematic diagram of the first exploded structure of the locking adjustment structure provided in an embodiment of the present invention, Figure 3 is a schematic diagram of the second exploded structure of the locking adjustment structure provided in an embodiment of the present invention, Figure 4 is a schematic diagram of the installation of the adjustment unit and the slider in the embodiment of the present invention, Figure 5 is a structural schematic diagram of the knob unit in the embodiment of the present invention, Figure 6 is a schematic diagram of the first partial structure of the locking adjustment structure provided in the embodiment of the present invention, Figure 7 is a schematic diagram of the partial enlarged structure at A in Figure 6, Figure 8 is a schematic diagram of the structure of the telescopic band in the embodiment of the present invention, Figure 9 is a schematic diagram of the movement principle structure of the telescopic band in the embodiment of the present invention, Figure 10 is a schematic diagram of the first structure of the rear shell in the embodiment of the present invention, and Figure 11 is a schematic diagram of the second structure of the rear shell in the embodiment of the present invention.

Embodiment 1

The locking adjustment structure provided in this embodiment is mainly used in wearable devices such as VR devices, smart glasses, smart bracelets, smart watches, etc. By optimizing the locking adjustment structure, it has the function of adjusting the tightness of the wearable device with one hand, thereby optimizing the user experience.

As shown in Figures 1 to 3, the locking and adjustment structure of the wearable device of this embodiment includes a shell; a telescopic belt is slidably connected to the shell, and an adjustment portion is formed at one end of the telescopic belt extending into the shell; an adjustment unit 20 is rotatably connected inside the shell, wherein the rotation mode of the adjustment unit 20 and the shell is self-rotation, that is, the axis of the adjustment unit 20 is fixed relative to the shell, and when the adjustment unit 20 rotates, the adjustment unit 20 can drive the telescopic belt to extend or retract into the shell.

Referring to FIG. 3 and FIG. 4 , the adjustment unit 20 is slidably connected to the slider 30 along its radial direction, and an elastic unit 40 is provided between the slider 30 and the adjustment unit 20, one end of the elastic unit 40 is fixedly connected to the adjustment unit 20, and the other end of the elastic unit 40 is fixedly connected to the slider 30, for pressing the slider 30 on the inner wall of the housing. It should be noted that when the slider 30 is pressed on the inner wall of the housing, it is difficult for the slider 30 to slide relative to the housing.

4 and 5 , the shell is rotatably connected to a knob unit 50 outside the slider 30. A limiting portion 31 is protruded from one side of the slider 30 close to the knob unit 50. The knob unit 50 is provided with a limiting groove 51 corresponding to the position of the limiting portion 31. The limiting groove 51 can be movably mounted outside the limiting portion 31.

The two ends of the limiting groove 51 are bent inwardly in the direction close to the axis of the adjustment unit 20. When the knob unit 50 rotates to the first angle, one end of the limiting groove 51 abuts against the limiting portion 31, and the elastic unit 40 is compressed. It should be noted that the direction of the first angle is not limited and can be either clockwise or counterclockwise.

Specifically, when adjusting the state, the user only needs to turn the knob unit 50 with one hand. During the process of rotating the knob unit 50 to the first angle, since the end of the limiting groove 51 is bent inward along the direction close to the axis of the adjusting unit 20, the knob unit 50 squeezes the limiting portion 31 through the limiting groove 51, causing the slider 30 to slide inward along the radial direction of the adjusting unit 20, so that the elastic unit 40 is compressed; until the knob unit 50 rotates to the first angle, the limiting portion 31 abuts against the end of the limiting groove 51, and the slider 30 does not abut against the inner wall of the shell, and when the knob unit 50 continues to rotate, the limiting portion 31 can abut against the end of the limiting groove 51, so that the adjusting unit 20 and the knob unit 50 are relatively locked, that is, the adjusting unit 20 can rotate synchronously with the knob unit 50, thereby driving the telescopic belt to extend or retract into the shell. In summary, in the above-mentioned adjustment process, the user first rotates the knob unit 50 to the first angle to release the lock between the adjustment unit 20 and the shell by the elastic unit 40, and then rotates the knob unit 50 to drive the adjustment unit 20 to rotate synchronously, thereby driving the retractable belt to extend or retract into the shell, thereby achieving the purpose of adjusting the wearing tightness with one hand and optimizing the user experience.

In this embodiment, as shown in FIG4 , a slide groove 21 is provided on the end surface of the adjustment unit 20 close to the knob unit 50, the slider 30 is slidably connected to the slide groove 21, and one end of the elastic unit 40 is fixedly connected to the groove wall of the slide groove 21. Among them, by adopting the sliding connection mode between the slider 30 and the slide groove 21, no severe impact will be generated between the slider 30 and the slide groove 21, and the noise generated when the ratchet wheel and the ratchet bar collide with each other is avoided, thereby reducing the noise generated by the locking adjustment structure and further optimizing the use of the user; and, by providing the slide groove 21 on the end surface of the knob unit 50, the slider 30 only has three sides in contact with the groove wall of the slide groove 21, further reducing the possibility of rigid collision between the slider 30 and the adjustment unit 20.

In other optional embodiments, a blind groove can be radially opened on the wall surface of the adjustment unit 20, and the elastic unit 40 and the slider 30 are placed in the blind groove in sequence. Since the four side walls in the blind groove are wrapped around the slider 30, the slider 30 can be prevented from being dislocated, further improving the stability of the locking adjustment structure.

Further, as shown in FIG6 and FIG7, a first latching tooth portion 32 is formed at one end of the slider 30 away from the axis of the adjustment unit 20, and a second latching tooth portion 61 is disposed around the first latching tooth portion 32 in the housing. When the elastic unit 40 is not compressed, the first latching tooth portion 32 is meshed with the second latching tooth portion 61. When the elastic unit 40 is compressed, the first latching tooth portion 32 moves in a direction away from the second latching tooth portion 61, so that the first latching tooth portion 32 and the second latching tooth portion 61 are disengaged. At this time, the adjustment unit 20 is no longer limited by the housing, and can rotate synchronously with the knob unit 50, driving the telescopic belt to extend or retract into the housing.

Among them, the gap between the slider 30 and the slide slot 21 is smaller than the gap between the first latching tooth portion 32 and the second latching tooth portion 61. Through this arrangement, it is ensured that when the knob unit 50 is not rotated, even if the telescopic belt is pulled by external force, driving the adjustment unit 20 to produce a tendency to self-rotate, so that the slider 30 is subjected to external force and abuts against the slide slot 21, the gap between the first latching tooth portion 32 and the second latching tooth portion 61 on the slider 30 does not reach the preset gap, and the first latching tooth portion 32 on the slider 30 is still difficult to move to the next latching tooth position of the second latching tooth portion 61, so that the slider 30 is difficult to move further after abutting against the groove wall of the slide slot 21, ensuring that the elastic unit 40 will not retract under the action of external force, thereby ensuring the stability of the locking adjustment structure.

In other optional embodiments, an arc-shaped groove can be formed at one end of the slider 30 away from the axis of the adjustment unit 20, and the shell is provided with a plurality of arc portions around the arc-shaped groove, wherein the shape of the arc-shaped groove matches the shape of the arc-shaped portion, and when the elastic unit 40 is not compressed, the arc-shaped groove is arranged outside the arc portion.

In this embodiment, the elastic unit 40 is a compression spring. In other optional embodiments, the elastic unit 40 can be a unit capable of providing a rebound force, such as a micro cylinder or a micro air bag.

In this embodiment, the limiting groove 51 is an arc groove, which can make the limiting portion 31 move more smoothly when being squeezed by the limiting groove 51, thereby improving the stability of the locking adjustment structure. In other optional embodiments, the limiting groove 51 can be in an "A" shape or other shapes, as long as the limiting portion 31 can move along the axis direction close to the adjustment unit 20.

Further, as shown in FIG. 9 , a gear portion 22 is formed at one end of the adjustment unit 20 away from the knob unit 50 , and a rack portion 13 is provided at a position of the telescopic belt corresponding to the gear portion 22 , and the gear portion 22 meshes with the rack portion 13 .

In a specific embodiment, as shown in Figure 8, the telescopic belt includes a first telescopic belt 11 and a second telescopic belt 12. An opening is provided at one end of the first telescopic belt 11 extending into the shell and at one end of the second telescopic belt 12 extending into the shell, and a rack portion 13 is formed on the inner wall of one side of the opening.

The rack portion 13 disposed on the first telescopic band 11 and the rack portion 13 disposed on the second telescopic band 12 are disposed on both sides of the rack portion 13 respectively.

In other optional embodiments, the telescopic belt may include a telescopic unit, which is a flexible telescopic unit. One end of the flexible telescopic unit forms a rack portion 13, and the other end of the flexible telescopic unit can extend from one end of the shell, bypass the user's head, and extend to the other end of the shell to complete the wearing.

Furthermore, as shown in FIG. 3 , the knob unit 50 is also connected to a fixing member 52 via a connecting member, and the fixing member 52 passes through the housing to mount the knob unit 50 on the housing; and the adjustment unit 20 is sleeved outside the fixing member 52 .

In addition, the shell in this embodiment includes a front shell 60 and a rear shell 70 connected to each other, and a support member 80 is also arranged between the front shell 60 and the rear shell 70. An installation cavity is arranged between the front shell 60 and the rear shell 70, and the first telescopic band 11 and the second telescopic band 12 are both arranged in the installation cavity, and the first telescopic band 11 and the second telescopic band 12 are arranged between the rear shell 70 and the support member 80.

More specifically, as shown in Figures 9 to 11, a slide groove 71 with holes at both ends is provided on the rear shell body 70, wherein the slide groove 71 is spliced by the rear shell body 70 and the support member 80, the first slide hole 72 of the slide groove 71 is penetrated by the first telescopic band 11, the second slide hole 73 is penetrated by the second telescopic band 12, and the groove wall of the slide groove 71 is provided with avoidance holes corresponding to the openings of the first telescopic band 11 and the second telescopic band 12, so that one end of the adjustment unit 20 can extend into the slide groove 71 and cooperate with the first telescopic band 11 and the second telescopic band 12.

In particular, the front shell body 60 is provided with a mounting groove, a second tooth portion 61 is formed on the groove wall of the mounting groove, and a avoidance hole is provided at the bottom of the mounting groove. The diameter of one end of the adjusting unit 20 provided with the slide groove 21 is larger than the diameter of one end of the adjusting unit 20 provided with the gear portion 22. Thus, the end of the adjusting unit 20 provided with the gear portion 22 can pass through the avoidance hole and engage with the rack portion 13 on the telescopic belt, and the end of the adjusting unit 20 provided with the slide groove 21 is supported on the bottom of the mounting groove to ensure the position accuracy between the slider 30 and the second tooth portion 61.

In summary, the adjustment and locking structure provided in this embodiment can be operated with one hand, which optimizes the user experience and has the advantages of high precision, low noise, simple structure, and high stability.

Embodiment 2

The wearable device of this embodiment includes the locking and adjusting structure in Embodiment 1. Embodiment 1 describes the specific structure and technical effects of the locking and adjusting structure, and the wearable device of this embodiment refers to the structure and also has its technical effects.

The adjustment process of the wearable device is described in detail below: when it is necessary to adjust the expansion and contraction amount of the first telescopic band 11 and the second telescopic band 12, the user can turn the knob unit 50. During the process of rotating the knob unit 50 by the first angle, the knob unit 50 drives the limiting portion 31 to move along the direction close to the axis of the adjustment unit 20 through the limiting groove 51, so that the elastic unit 40 is compressed, thereby, the first latching tooth portion 32 of the slider 30 is disengaged from the second latching tooth portion 61 on the front shell 60 and the meshing is released; then, the user continues to turn the knob unit 50. Since the groove wall at the end of the limiting groove 51 is in contact with the limiting portion 31 at this time, and the first latching tooth portion 32 is disengaged from the second latching tooth portion 61, the adjustment unit 20 rotates synchronously with the knob unit 50, thereby adjusting the extension amount of the first telescopic band 11 and the second telescopic band 12 through the gear portion 22 and the rack portion 13.

In summary, the wearable device provided in this embodiment can be operated with one hand, which optimizes the user experience and has the advantages of high precision, low noise, simple structure, and high stability.

As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A locking and adjusting structure of a wearable device, characterized in that it comprises a shell; a retractable belt is slidably connected to the shell; an adjusting unit (20) is rotatably connected inside the shell, and the adjusting unit (20) is used to drive the retractable belt to extend or retract into the shell; The adjusting unit (20) is slidably connected to a slider (30), and an elastic unit (40) is provided between the slider (30) and the adjusting unit (20), one end of the elastic unit (40) is fixedly connected to the adjusting unit (20), and the other end of the elastic unit (40) is fixedly connected to the slider (30), so as to press the slider (30) onto the inner wall of the housing; The housing is rotatably connected to a knob unit (50) outside the slider (30); a limiting portion (31) is convexly provided on a side of the slider (30) close to the knob unit (50); a limiting groove (51) is provided on the knob unit (50) at a position corresponding to the limiting portion (31); and the limiting groove (51) is movably sleeved outside the limiting portion (31); The two ends of the limiting groove (51) are respectively bent inwardly in a direction close to the axis of the adjustment unit (20); when the knob unit (50) rotates to a first angle, one end of the limiting groove (51) abuts against the limiting portion (31), and the elastic unit (40) is compressed; A sliding groove (21) is provided on the end surface of the adjustment unit (20) close to the knob unit (50), the sliding block (30) is slidably connected to the sliding groove (21), and one end of the elastic unit (40) is fixedly connected to the groove wall of the sliding groove (21); A first latching tooth portion (32) is formed at one end of the slider (30) away from the axis of the adjustment unit (20), and a second latching tooth portion (61) is arranged on the shell around the first latching tooth portion (32); When the elastic unit (40) is not compressed, the first latching tooth portion (32) is meshed with the second latching tooth portion (61); The gap between the sliding block (30) and the sliding groove (21) is smaller than the gap between the first latching tooth portion (32) and the second latching tooth portion (61). 2. The locking adjustment structure of the wearable device according to claim 1, characterized in that the elastic unit (40) is a compression spring. 3. The locking adjustment structure of the wearable device according to claim 1 is characterized in that the limiting groove (51) is an arc groove. 4. The locking adjustment structure of the wearable device according to claim 1 is characterized in that a gear portion (22) is formed at one end of the adjustment unit (20) away from the knob unit (50), and a rack portion (13) is provided at a position of the retractable belt corresponding to the gear portion (22), and the gear portion (22) is meshed with the rack portion (13). 5. The locking adjustment structure of the wearable device according to claim 4, characterized in that the telescopic belt comprises a first telescopic belt (11) and a second telescopic belt (12), and an end of the first telescopic belt (11) extending into the shell and an end of the second telescopic belt (12) extending into the shell are both provided with an opening, and the rack portion (13) is formed on an inner wall of one side of the opening; The rack portion (13) arranged on the first telescopic belt (11) and the rack portion (13) arranged on the second telescopic belt (12) are respectively arranged on both sides of the rack portion (13). 6. The locking and adjustment structure of the wearable device according to claim 1 is characterized in that the knob unit (50) is also connected to a fixing member (52) through a connecting member, and the fixing member (52) passes through the shell to install the knob unit (50) on the shell; and the adjustment unit (20) is sleeved outside the fixing member (52). 7. A wearable device, characterized in that it comprises a locking and adjusting structure as described in any one of claims 1-6.