Watchband adjusting assembly and wearable device

Abstract

The utility model discloses a watchband adjusting assembly and wearable equipment, the watchband adjusting assembly is detachably connected to a watchband, the watchband adjusting assembly specifically comprises a main shell and an adjusting main body, the main shell is provided with two watchband holes and a cavity, the watchband holes are used for accommodating part of the watchband, at least one watchband hole is communicated with the cavity, and the adjusting main body is used for adjusting the watchband. Two ends of the watchband are respectively connected to the watchband holes; the adjusting body is arranged in the cavity and comprises a motor and a transmission part, the motor is used for driving the transmission part to rotate, the transmission part is provided with transmission end faces distributed in the circumferential direction so as to be in butt joint with part of the end faces of the watchband, and when the motor is started, the transmission part rotates and drives the watchband to move. According to the technical scheme, the watchband elasticity adjusting device has high independence, the function of adjusting the tightness of the watchband can be achieved without modifying the whole machine, the application range and the application scene are expanded, and meanwhile the experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of watchband adjustment, and further relates to a watchband adjustment component and a wearable device. Background Art

[0002] At present, most wearable device straps on the market are buckle or magnetic, but the thickness of each user's wrist is different. In many cases, the wearing state is either too tight or too loose, making it uncomfortable to wear. Sometimes it is easy to fall off accidentally, affecting the user experience. Some adjustment devices involve changes to the entire machine, which increases the production difficulty to a certain extent.

[0003] In summary, there is a need to improve the current technology. Utility Model Content

[0004] In response to the above technical problems, the purpose of the utility model is to provide a strap adjustment component and a wearable device. The strap adjustment component is an independent solution that does not involve changes to the entire machine. The tightness of the strap is adjusted by motor drive, which makes the operation simpler, reduces the errors that may be caused by manual operation of the user, and improves the user experience.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a strap adjustment component, which is detachably connected to the strap of a wearable device and is used to adjust the tightness of the strap relative to the wearing part of the human body, including:

[0006] The main housing has two staggered strap holes and a cavity, wherein the strap holes are used to receive part of the strap, and at least one of the strap holes is connected to the cavity.

[0007] The two ends of the strap are respectively connected to the corresponding strap holes and can be operably removed from the corresponding strap holes to separate the strap adjustment assembly from the strap;

[0008] An adjusting body, the adjusting body is arranged in the cavity, and comprises a motor and a transmission member, the motor is used to drive the transmission member to rotate, and the transmission member has a circumferentially distributed transmission end surface, and the transmission end surface cooperates with a part of the end surface of the strap;

[0009] When the motor is started, the transmission member rotates and synchronously drives the watch strap, so that at least part of the watch strap moves along the extension trajectory of the corresponding watch strap hole and moves toward or away from the main shell to form the retraction and extension of the watch strap.

[0010] It is worth mentioning that the operator can directly align the strap hole on the main shell with the strap for assembly, and then use the function of adjusting the strap retraction and extension without modifying the entire machine, making the solution highly independent.

[0011] In some embodiments, the strap includes a first strap body and a second strap body, and the strap hole is distinguished as a first strap hole and a second strap hole by the first strap body and the second strap body;

[0012] The first belt body is between the adjustment body and the second belt body, and the transmission end surface is cooperatively connected with the corresponding end surface on the first belt body, so that the first belt body can move synchronously when the transmission member rotates and generate displacement along the extension track of the first watch band hole.

[0013] In some embodiments, the first strap hole passes through the main housing along its extension trajectory, so that the first strap hole is in the shape of a through hole, and the first strap body is inserted through the first strap hole;

[0014] The extension direction of the second strap hole is consistent with the extension direction of the first strap hole, and the second strap hole extends from a side wall of the main shell to an opposite side wall thereof to a preset depth to form a through hole or a non-through hole.

[0015] In some embodiments, a rotation slot is provided on the main housing, and the first strap hole is connected to the cavity through the rotation slot;

[0016] The transmission member is located in the rotation groove so as to be limited by the rotation groove, and at least a portion of the transmission member extends from the rotation groove toward the first strap hole for contact with the first strap body.

[0017] In some embodiments, the transmission member is a gear, the gear is connected to the output end of the motor, and the gear has a plurality of gear teeth to form the transmission end face through the gear teeth;

[0018] The watchband is provided with a plurality of adjustment holes, and when the gear rotates, at least some of the adjustment holes are matched and connected with the corresponding gear teeth.

[0019] In some embodiments, the motor is a piezoelectric motor, the shell of the piezoelectric motor is connected to the main shell through a fixing part, and the piezoelectric motor is used to provide driving force and self-locking force, so that when the piezoelectric motor stops, the position of the strap relative to the main shell can be limited and locked under the action of the self-locking force.

[0020] In some embodiments, the strap adjustment assembly also includes a sensor module, which is used to detect the pressure generated by the strap relative to the wearing part of the human body or the contact surface state of the strap relative to the wearing part of the human body; the top wall of the main shell is provided with a receiving groove, the receiving groove faces the wearing part of the human body, and the sensor module is arranged in the receiving groove.

[0021] In some embodiments, a mainboard is installed in the main shell, the mainboard is located in the cavity, and a wire groove is opened in the main shell, the wire groove connects the accommodating groove and the cavity at the same time, the sensor module is electrically connected to the mainboard through an FPC flexible circuit board, and the FPC flexible circuit board is extended through the wire groove.

[0022] In some embodiments, a power supply module is installed in the main shell, and the power supply module is electrically connected to the motor for supplying power to the motor.

[0023] Another aspect of the present invention also provides a wearable device, including a device body and a strap, and also includes: the above-mentioned strap adjustment component, wherein the strap adjustment component is detachably connected to the strap.

[0024] Compared with the prior art, the strap adjustment assembly and wearable device provided by the utility model have the following beneficial effects:

[0025] 1. The utility model provides a watch strap adjustment assembly, and the operator can directly align the watch strap hole on the main shell with the watch strap for assembly, without modifying the whole machine, and without providing control and power to the whole machine, the function of adjusting the retraction and extension of the watch strap can be realized, making the solution highly independent.

[0026] 2. The utility model provides a watch strap adjustment component which utilizes a piezoelectric motor to drive a gear and omits intermediate components such as a reducer, making the structure very simple. This not only improves the reliability of the mechanism but also reduces the cost, and simplifies the processing and assembly process, which is conducive to the miniaturization of the watch strap adjustment component. Moreover, the piezoelectric motor is driven by friction and inertia, so there is no electromagnetic interference and there is no need to consider electromagnetic tolerance, which effectively overcomes the electromagnetic compatibility problem existing in traditional electromagnetic motor drive.

[0027] 3. The utility model provides a watch strap adjustment component, which further improves the wearing comfort by setting a sensor module to detect the pressure or contact of the watch strap relative to the human body. At the same time, the sensor module is connected to the main board through an FPC flexible circuit board to prevent the circuit board from bending and affecting the signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0029] Figure 1 It is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0030] Figure 2is a cross-sectional view of an adjusting body in one embodiment of the utility model;

[0031] Figure 3 It is a schematic diagram of the explosion structure of the regulating body in one embodiment of the utility model;

[0032] Figure 4 It is a cross-sectional view of another viewing angle of the main body in one embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0034] Figure 6 It is a partial structural schematic diagram of an embodiment of the utility model.

[0035] Explanation of the accompanying drawings: main shell 1; cavity 100; first strap hole 101; second strap hole 102; rotating groove 11; accommodating groove 12; wire groove 13; motor 2; gear 3; first strap body 41; adjustment hole 411; second strap body 42; sensor module 5; top cover 61; bottom plate 62; main board 7; FPC flexible circuit board 71; power supply module 8; device body 9. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0038] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In one embodiment, the reference specification Figure 1 A watch strap adjustment component provided by the utility model is described. The watch strap adjustment component provided by the utility model does not involve changes to the entire machine, and can adjust the tightness of the watch strap through motor drive, which is simpler to operate, reduces errors that may be caused by manual operation by users, and improves user experience.

[0043] Reference Manual Attached Figure 1 and Figure 2 The utility model provides a watch strap adjustment assembly, including a main shell 1 and an adjustment body. The main shell 1 has two staggered watch strap holes and a cavity 100. The watch strap holes are used to store part of the watch strap, and at least one of the watch strap holes is connected to the cavity 100. The two ends of the watch strap are respectively connected to the corresponding watch strap holes.

[0044] The adjustment body is arranged in the cavity 100, and includes a motor 2 and a transmission member. The motor 2 is used to drive the transmission member to rotate, and the transmission member has a circumferentially distributed transmission end surface, and the transmission end surface cooperates with a part of the end surface of the strap.

[0045] Furthermore, when the motor 2 is started, the transmission member rotates and synchronously drives the watch strap, so that at least part of the watch strap moves along the extension trajectory of the corresponding watch strap hole, and at least part of the watch strap moves toward or away from the main shell 1 to form the retraction and extension of the watch strap.

[0046] In this embodiment, the strap adjustment component is directly arranged on the strap of the wearable device, that is, the operator can directly align the strap hole on the main shell 1 with the strap for assembly, and can easily use the function of adjusting the strap retraction and extension to adjust the tightness of the strap relative to the wearing part of the human body without modifying the entire device, which makes the solution highly independent.

[0047] It should also be noted that the two strap holes are staggered, which can effectively prevent the two ends of the strap from affecting each other and causing friction when retracting and releasing, thereby affecting the efficiency of retraction and release and the life of the strap. Moreover, in this embodiment, it is not limited to horizontal misalignment, vertical misalignment, and other similar misalignment situations. It is obvious that technicians can easily change this point without departing from the technical concept of this embodiment.

[0048] At the same time, in the present embodiment, the number of strap holes connected to the cavity 100 is at least one, which is actually set according to the specific situation. The strap hole and the cavity 100 are connected to allow the strap in the strap hole to directly connect with the transmission part. If only one side of the strap is to be retracted and released, then only one strap hole is connected to the cavity 100. If it is necessary to retract and release both sides of the strap simultaneously, then both strap holes are connected to the cavity 100, and the number of motors 2 and transmission parts can be increased accordingly.

[0049] It should also be noted that the start or stop of the above-mentioned motor 2 is generally controlled by a control system. The control system can operate according to a built-in program, such as automatic control based on information sensed by a sensor, or it can be connected to a user's device, such as a mobile phone or wearable device, through wireless communication technologies such as Bluetooth and WiFi. The option of adjusting the strap is displayed on the mobile phone or wearable device, allowing the user to manually adjust it to make the wearing of the strap more personalized.

[0050] In one embodiment, the strap includes a first strap body 41 and a second strap body 42 , and the strap holes are distinguished by the first strap body 41 and the second strap body 42 as a first strap hole 101 and a second strap hole 102 .

[0051] The first strap body 41 is between the adjustment body and the second strap body 42 , and the transmission end face is matched and connected with the corresponding end face on the first strap body 41 , so that the first strap body 41 can move synchronously when the transmission member rotates and generate displacement along the extension track of the first strap hole 101 .

[0052] like Figure 1 As shown, it can be understood that the material, shape and other parameters of the first strap body 41 and the second strap body 42 are generally basically the same. The accompanying drawings show a relatively flat strap, but in actual use, without affecting the technical effect of the utility model, a strap with a circular or elliptical cross-section can also be used.

[0053] In addition, the first belt body 41 is directly connected to the transmission member, so when the motor 2 is started, the transmission member only drives the first belt body 41 to be retracted and extended, and the first belt body 41 and the first strap hole 101 are movably connected. At the same time, according to different needs, if the strap adjustment component needs to be removed from the strap, the second belt body 42 can be fixed to the second strap hole 102 by snap connection (either detachable or fixed). Of course, in some embodiments, the strap adjustment component will be directly fixed to the strap, and the second belt body 42 and the second strap hole 102 can be fixed by dispensing glue or the like.

[0054] In one embodiment, the first strap hole 101 passes through the main housing 1 along its extension trajectory, so that the first strap hole 101 is in the shape of a through hole, and the first strap body 41 is inserted into the first strap hole 101 .

[0055] For details, please refer to the attached Figure 2 In the present embodiment, the first strap hole 101 is a through hole, so that the first strap body 41 can extend or retract relative to both ends of the first strap hole 101, and the effective adjustment length of the entire assembly can be increased. Of course, in other embodiments, the first strap hole 101 can also be in the form of a non-through hole.

[0056] With the above content, it is not difficult for us to imagine that the second strap hole 102 also extends from one side wall of the main shell 1 to its opposite side wall to a preset depth to form a through hole or a non-through hole, wherein the form of the non-through hole is similar to that of the second strap hole 102 in the accompanying drawings, that is, the end of one side of the second strap body 42 will not exceed the edge of the main shell 1, which to a certain extent reduces the dust or water stains entering the interior of the component through the gap between the two; in some embodiments, the second strap hole 102 can also be set to the form of a through hole, please refer to the first strap hole 101 for details.

[0057] At the same time, it can be seen from the accompanying drawings that the extension direction of the second strap hole 102 is consistent with the extension direction of the first strap hole 101, so that the insertion trajectories of the first strap body 41 and the second strap body 42 when inserting into the corresponding strap holes are parallel to each other, which can avoid the first strap body 41 and the second strap body 42 from colliding or colliding when the length of the strap is adjusted, thereby improving the reliability of the component. At the same time, the form of the strap hole in the accompanying drawings is also more conducive to production and processing. Of course, in other embodiments, the first strap hole 101 and the second strap hole 102 can be set at an angle or have different orientations, etc., as long as it does not affect the normal retraction and extension of the strap, this part can be replaced accordingly.

[0058] Based on the above embodiments, Figure 3 and Figure 4 As shown, a rotation slot 11 is provided on the main housing 1, and the first strap hole 101 is connected with the cavity 100 through the rotation slot 11. The transmission member is located in the rotation slot 11 so as to be limited by the rotation slot 11.

[0059] It is understandable that the motor 2 is bound to generate some vibrations when it is started. Whether it is slight vibration or strong vibration, it will have a certain impact on the transmission part, thereby causing the transmission part to shift and deviate from the preset position. The rotating groove 11 set can effectively limit the transmission part in the groove and effectively prevent it from being misplaced, thereby further improving the tightness and accuracy of the fit between the transmission part and the strap.

[0060] As shown in the figure, at least part of the transmission member extends from the rotating groove 11 toward the first strap hole 101, forming a portion of the protruding section, which can be connected to the first strap body 41, and the first strap body 41 only needs to be displaced along the first strap hole 101, and the first strap hole 101 continuously provides guidance for its displacement.

[0061] In one embodiment, Figure 2 and Figure 4 The transmission member is a gear 3, which is connected to the output end of the motor 2, and has a plurality of gear teeth, so that the gear teeth form a transmission end face. At the same time, the strap is provided with a plurality of adjustment holes 411, which are sequentially arranged along the length direction of the strap. When the strap is retracted or extended, the above-mentioned partial adjustment holes 411 are respectively connected with the gear teeth.

[0062] For details, please refer to the manual. Figure 6The adjustment hole 411 shown in the attached figure runs through the thickness direction of the strap. When the user does not need to install the strap adjustment component, he can directly remove it from the strap. Then, the wearable device can directly fasten the strap through the buckle, and it can be changed to a normal wearing method, making the wearing method more diverse. Of course, the adjustment hole 411 may not run through the thickness direction of the strap. As long as the strap can form a certain position through the gear teeth when the gear 3 stops rotating, so as to avoid the adjusted strap length from changing again, the adjustment hole 411 is more like a groove.

[0063] In another embodiment, based on the above embodiment, the motor 2 is a piezoelectric motor, the housing of the piezoelectric motor is connected to the main housing 1 through a fixing member, and the piezoelectric motor provides driving force and self-locking force.

[0064] It should be noted that in this embodiment, a piezoelectric motor is used for driving, and the inverse piezoelectric effect of the piezoelectric material is used to convert electrical energy into mechanical energy. The stator is usually a composite elastomer of a specific shape composed of piezoelectric ceramics and metal elastomers. Mechanical deformation is achieved in the stator elastomer by applying positive and negative AC or DC voltages to the piezoelectric ceramics, and then particles in the stator driving area form a motion trajectory with a driving effect. The output of the rotor's macroscopic motion is further achieved through friction coupling between the stator and the rotor.

[0065] Therefore, compared with general electromagnetic motors, piezoelectric motors have high positioning accuracy and fast response speed, and can be used to achieve high-precision speed control and position control. In addition, the self-locking force of the piezoelectric motor can be used to save the limit mechanism to ensure that the strap is locked in the current state, thereby improving space utilization, greatly simplifying the system structure and design complexity, and facilitating the miniaturization of the overall equipment.

[0066] In one embodiment, Figure 3 As shown, the watchband adjustment assembly also includes a sensor module 5, which is used to detect the pressure generated by the watchband relative to the wearing part of the human body or the contact surface state of the watchband relative to the wearing part of the human body.

[0067] It can be understood that the above-mentioned sensing module 5 is generally a sensor, such as a pressure sensor. When the pressure of the strap relative to the wrist is too large, the pressure sensor detects a signal and transmits it to the control center, which then controls the motor 2 through the control center, thereby achieving the purpose of loosening the strap.

[0068] Of course, in some embodiments, the sensor can be used only for wearing detection. According to the detection of the sensor, it is determined whether the wearable device is in a wearing state. If it is not in a wearing state, the control center controls the wearable device to enter a sleep state or a shutdown state to reduce power consumption and extend battery life.

[0069] Specifically, Figure 3 As shown, the top wall of the main shell 1 is provided with a receiving groove 12, and the sensor module 5 is arranged in the receiving groove 12. The receiving groove 12 faces the wearing part of the human body, which is facing the body of the wearable device as seen from the accompanying drawings. Of course, after the sensor module 5 is installed in the receiving groove 12, a top cover 61 may also be covered thereon, and according to the specific function of the sensor, the top cover 61 may be made of a hard material or a flexible material, and its main function is to prevent the internal components from falling off.

[0070] In another embodiment, a main board 7 is installed in the main shell 1, the main board 7 is located in the cavity 100, and a wire groove 13 is opened in the main shell 1, the wire groove 13 is connected to the accommodating groove 12 and the cavity 100 at the same time, the sensor module 5 is electrically connected to the main board 7 through the FPC flexible circuit board 71, and the FPC flexible circuit board 71 is extended through the wire groove 13 to avoid breakage during the wiring process.

[0071] Also refer to the instruction manual Figure 4 In this embodiment, the wiring path of the FPC circuit board formed by the wire groove 13 can avoid the first strap hole 101 and the second strap hole 102, so as to avoid the wear of the FPC flexible circuit board 71 during the retraction and extension process of the strap, thereby improving the service life of both.

[0072] Furthermore, a power supply module 8 is installed in the main housing 1, and the power supply module 8 is electrically connected to the motor 2 for supplying power to the motor 2. Specifically, the power supply module 8 is installed in a bottom plate 62, and the bottom plate 62 can seal the cavity 100 on the main housing 1. At the same time, this form is more conducive to production and processing, as well as the subsequent assembly process, and reduces the difficulty of production.

[0073] In one embodiment, the reference specification Figure 5 According to another aspect of the present invention, the present invention further provides a wearable device, which includes a device body 9, a watch strap and the above-mentioned watch strap adjustment component, and the watch strap adjustment component can be detachably connected to the watch strap, so that the watch strap can realize the function of automatic retraction and extension to adapt to the thickness of wrists of different users.

[0074] It should also be noted that the strap adjustment component in the attached drawings is facing the device body, that is, in the middle position. In specific settings, the strap adjustment component can be set to the left or right according to the length or type of the strap, etc.; at the same time, the strap adjustment component in actual conditions will not be as large as in the attached drawings, and will not cause discomfort to the user's wrist. The attached drawings are only schematic diagrams formed to facilitate understanding, and the proportions therein cannot represent the actual situation.

[0075] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A watch strap adjustment assembly, It is characterized in that A watch strap detachably connected to a wearable device, used to adjust the tightness of the watch strap relative to the wearing part of the human body, comprising: The main housing has two staggered strap holes and a cavity, wherein the strap holes are used to receive part of the strap, and at least one of the strap holes is connected to the cavity. The two ends of the strap are respectively connected to the corresponding strap holes and can be operably removed from the corresponding strap holes to separate the strap adjustment assembly from the strap; An adjusting body, the adjusting body is arranged in the cavity, and comprises a motor and a transmission member, the motor is used to drive the transmission member to rotate, and the transmission member has a circumferentially distributed transmission end surface, and the transmission end surface cooperates with a part of the end surface of the strap; When the motor is started, the transmission member rotates and synchronously drives the watch strap, so that at least part of the watch strap moves along the extension trajectory of the corresponding watch strap hole and moves toward or away from the main shell to form the retraction and extension of the watch strap.

2. A watch strap adjustment assembly according to claim 1, It is characterized in that The watch strap comprises a first strap body and a second strap body, and the watch strap hole is distinguished as a first watch strap hole and a second watch strap hole by the first strap body and the second strap body; The first belt body is between the adjustment body and the second belt body, and the transmission end surface is cooperatively connected with the corresponding end surface on the first belt body, so that the first belt body can move synchronously when the transmission member rotates and generate displacement along the extension track of the first watch band hole.

3. A watch strap adjustment assembly according to claim 2, It is characterized in that The first strap hole passes through the main housing along its extension trajectory, so that the first strap hole is in a through-hole shape, and the first strap body is inserted through the first strap hole; The extension direction of the second strap hole is consistent with the extension direction of the first strap hole, and the second strap hole extends from a side wall of the main shell to an opposite side wall thereof to a preset depth to form a through hole or a non-through hole.

4. A watch strap adjustment assembly according to claim 3, It is characterized in that A rotation slot is provided on the main housing, and the first strap hole is connected to the cavity through the rotation slot; The transmission member is located in the rotation groove so as to be limited by the rotation groove, and at least a portion of the transmission member extends from the rotation groove toward the first strap hole for contact with the first strap body.

5. A watch strap adjustment assembly according to claim 1, It is characterized in that The transmission member is a gear, the gear is connected to the output end of the motor, and the gear has a plurality of gear teeth to form the transmission end face through the gear teeth; The strap is provided with a plurality of adjustment holes, which are arranged in sequence along the length direction of the strap. When the gear rotates, at least some of the adjustment holes are connected with the corresponding gear teeth.

6. A watch strap adjustment assembly according to claim 1, It is characterized in that The motor is a piezoelectric motor, the shell of which is connected to the main shell through a fixing part, and the piezoelectric motor is used to provide driving force and self-locking force, so that when the piezoelectric motor stops, the position of the strap relative to the main shell can be limited and locked under the action of the self-locking force.

7. A watch strap adjustment assembly according to claim 1, It is characterized in that Also includes: A sensor module, the sensor module is used to detect the pressure generated by the watchband relative to the wearing part of the human body or the contact surface state of the watchband relative to the wearing part of the human body; The top wall of the main shell is provided with a receiving groove, the receiving groove faces the wearing part of the human body, and the sensor module is arranged in the receiving groove.

8. A watch strap adjustment assembly according to claim 7, It is characterized in that A mainboard is installed in the main shell, the mainboard is located in the cavity, and a wire groove is opened in the main shell, the wire groove connects the accommodating groove and the cavity at the same time, the sensor module is electrically connected to the mainboard through an FPC flexible circuit board, and the FPC flexible circuit board is extended through the wire groove.

9. A watch strap adjustment assembly according to any one of claims 1 to 8, It is characterized in that A power supply module is installed in the main shell, and the power supply module is electrically connected to the motor for supplying power to the motor.

10. A wearable device, comprising a device body and a strap, It is characterized in that include: A watchband adjustment assembly as described in any one of claims 1 to 9, wherein the watchband adjustment assembly is detachably connected to the watchband.

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