Strap tightness adjusting mechanism and wearable device

Abstract

The application discloses a band tightness adjusting mechanism and wearable equipment. The band tightness adjusting mechanism comprises a shell, an installation cavity is formed in the shell, an adjusting wheel is arranged outside the shell and rotationally connected with the shell, a clutch assembly is slidably arranged in the installation cavity and drivingly connected with the adjusting wheel, a button is arranged outside the shell and movably connected with the shell, the button drives the clutch assembly to slide from a first position to a second position, a driving assembly is arranged on one side of the adjusting wheel and drives the clutch assembly to slide from the second position to the first position, in the first position, the driving assembly is drivingly connected with the adjusting wheel to drive the adjusting wheel to rotate in two directions, and in the second position, the driving assembly is disconnected with the adjusting wheel. The application provides a band tightness adjusting mechanism and wearable equipment, and solves the technical problem that the existing band is inconvenient to adjust tightness.

Description

Technical Field

[0001] This invention relates to the field of strap technology for smart wearable devices, and more particularly to a strap tension adjustment mechanism and a wearable device. Background Technology

[0002] Head-mounted displays (HMDs) use an optical system to magnify images on an ultra-micro display screen, projecting the images onto the retina and presenting them as a large-screen image to the viewer. They can achieve different effects such as virtual reality (VR), augmented reality (AR), and mixed reality (MR).

[0003] In head-mounted display devices, the main unit is typically worn on the user's head using a headband or strap. During use, users need to manually rotate a knob to adjust the tightness of the headband for comfort, which is inconvenient. Summary of the Invention

[0004] The main objective of this invention is to provide a strap tension adjustment mechanism and a wearable device, which aims to solve the technical problem that existing straps are inconvenient to adjust tension.

[0005] To achieve the above objectives, embodiments of the present invention provide a strap tension adjustment mechanism, the strap tension adjustment mechanism comprising:

[0006] The casing has an internal mounting cavity.

[0007] An adjusting wheel is disposed outside the housing and is rotatably connected to the housing;

[0008] The clutch assembly is slidably disposed within the mounting cavity and drivenly connected to the adjusting wheel;

[0009] A button is disposed on the outside of the housing and is movably connected to the housing. The button drives the clutch assembly to slide from a first position to a second position.

[0010] A drive assembly is disposed on one side of the adjusting wheel and drives the clutch assembly to slide from the second position to the first position; in the first position, the drive assembly is driven to the adjusting wheel to drive the adjusting wheel to rotate bidirectionally, and in the second position, the drive assembly is disconnected from the adjusting wheel.

[0011] Optionally, in one embodiment of the present invention, the driving component:

[0012] A rotating structure is rotatably disposed within the mounting cavity. In the first position, the rotating structure is driven to the adjusting wheel to drive the adjusting wheel to rotate bidirectionally. In the second position, the rotating structure is disconnected from the adjusting wheel.

[0013] A limiting structure is slidably disposed within the mounting cavity. During the movement of the clutch assembly from the first position to the second position, the limiting structure moves from the third position to the fourth position. In the third position, the limiting structure locks the clutch assembly to connect the rotating structure and the adjusting wheel. In the fourth position, the limiting structure releases the lock on the clutch assembly, allowing the clutch assembly to move back to the second position.

[0014] A transmission structure connects the rotating structure and the limiting structure, wherein the rotating structure drives the limiting structure to move from the fourth position to the third position via the transmission structure.

[0015] Optionally, in one embodiment of the present invention, the limiting structure includes:

[0016] A limiting slider is slidably disposed within the mounting cavity to switch between the third position and the fourth position;

[0017] A first elastic reset element connects the limiting slider and the housing; and

[0018] A second elastic reset element connects the clutch assembly and the housing;

[0019] In the third position, the limiting slider is pressed against the outer periphery of the clutch assembly by the first elastic reset member to restrict the sliding of the clutch assembly; during the process of the clutch assembly moving from the first position to the second position, the limiting slider slides from the third position to the fourth position under the drive of the first elastic reset member; during the process of the limiting slider moving from the fourth position to the third position, the clutch assembly moves from the second position to the first position under the action of the second elastic reset member.

[0020] Optionally, in one embodiment of the present invention, the limiting structure includes a mounting groove disposed in the mounting cavity, the limiting slider and the first elastic reset member are disposed in the mounting groove; and / or, two limiting sliders are disposed opposite each other, each limiting slider is provided with a first elastic reset member, and the two limiting sliders can move toward each other or away from each other.

[0021] Optionally, in one embodiment of the present invention, the transmission structure includes:

[0022] A first actuating part is disposed on the side of the rotating structure facing the button, and multiple first actuating parts are arranged in a circumferential array; and

[0023] The second pushing part is provided on the limiting slider; during the rotation of the rotating structure, the first pushing part and the second pushing part cooperate to drive the limiting slider to move toward the third position.

[0024] Optionally, in one embodiment of the present invention, the rotating structure includes:

[0025] A worm gear is rotatably disposed within the mounting cavity. In the first position, the worm gear is driven to connect with the adjusting wheel to drive the adjusting wheel to rotate bidirectionally. In the second position, the worm gear is disconnected from the adjusting wheel. The first pushing part is disposed on the side of the worm gear away from the adjusting wheel.

[0026] A worm gear, rotatably disposed within the mounting cavity, meshes with the worm wheel; and

[0027] The motor is coaxially connected to the worm gear.

[0028] Optionally, in one embodiment of the present invention, the clutch assembly includes:

[0029] The first clutch block is located on the side of the rotating structure facing the adjusting wheel; and

[0030] The second clutch block is slidably disposed within the mounting cavity and drivenly connected to the adjusting wheel. The second elastic reset member connects the second clutch block and the housing. The rotating structure is sleeved on the outside of the second clutch block. The button drives the second clutch block to slide from the first position to the second position. In the first position and the third position, the second clutch block is connected to the rotating structure, and the limiting structure locks the second clutch block. In the second position and the fourth position, the limiting structure releases the lock of the second clutch block.

[0031] Optionally, in one embodiment of the present invention, the first clutch block is provided with a through hole, the second clutch block is movably disposed through the through hole, the peripheral wall of the through hole of the first clutch block is provided with a first meshing tooth, and the outer wall of the second clutch block is provided with a second meshing tooth, wherein, at the first position, the first meshing tooth and the second meshing tooth are engaged and connected; at the second position, the first meshing tooth and the second meshing tooth are separated.

[0032] Optionally, in one embodiment of the present invention, the clutch assembly further includes a connecting shaft, the connecting shaft connecting the adjusting wheel and the second clutch block, the second clutch block being slidably sleeved on the outside of the connecting shaft, wherein the connecting shaft is a non-cylindrical body.

[0033] Optionally, in one embodiment of the present invention, the strap tension adjustment mechanism further includes a third elastic reset member, which is connected to the adjustment wheel and the housing.

[0034] Optionally, in one embodiment of the present invention, the housing includes a detachably connected upper shell and a lower shell, which are fastened together to form the mounting cavity.

[0035] To achieve the above objectives, this invention provides an adjustable strap, which includes a strap body and a strap tension adjustment mechanism connected to the strap body. The strap tension adjustment mechanism is the strap tension adjustment mechanism described above, wherein the strap body is engaged with the adjustment wheel.

[0036] To achieve the above objectives, this invention provides a wearable device, which includes a device host, a strap connected to the device host, and a strap tension adjustment mechanism connected to the strap. The strap tension adjustment mechanism is the same as the strap tension adjustment mechanism described above.

[0037] Compared to existing technologies, the technical solution proposed in this invention involves pressing a button on the housing to move the clutch assembly from a first position to a second position. At this point, the adjusting wheel disengages from the drive assembly, allowing the user to manually rotate the adjusting wheel to loosen the strap, making it convenient to wear on the head or wrist. After wearing, the drive assembly activates, moving the clutch assembly from the second position back to the first position. The drive assembly then connects with the adjusting wheel, causing it to rotate bidirectionally, thus automatically adjusting the strap tightness. This strap tension adjustment mechanism replaces manual adjustment by the user's hands, enabling automatic tightening or loosening of the strap during wearable device use, which is simpler and more convenient than manual operation. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is an exploded view of an embodiment of the strap tension adjustment mechanism of the present invention. Figure 1 ;

[0040] Figure 2 This is an exploded view of an embodiment of the strap tension adjustment mechanism of the present invention. Figure 2;

[0041] Figure 3 This is a schematic diagram of an angle structure after removing the button in an embodiment of the strap tension adjustment mechanism of the present invention;

[0042] Figure 4 This is a schematic diagram of the limiting slider portion in an embodiment of the strap tension adjustment mechanism of the present invention;

[0043] Figure 5 This is a schematic diagram of the clutch assembly in an embodiment of the strap tension adjustment mechanism of the present invention;

[0044] Figure 6 This is a schematic diagram of the worm gear portion in an embodiment of the strap tension adjustment mechanism of the present invention;

[0045] Figure 7 This is a schematic diagram of the rotating structure in an embodiment of the strap tension adjustment mechanism of the present invention;

[0046] Figure 8 This is a schematic diagram of an angle structure of an embodiment of the strap tension adjustment mechanism of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the strap tension adjustment mechanism embodiment of the present invention before the button is pressed;

[0048] Figure 10 This is a schematic diagram of the structure of the strap tension adjustment mechanism embodiment of the present invention after the button is pressed.

[0049] Explanation of icon numbers:

[0050]

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of the present invention.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0054] Furthermore, in the embodiments of this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the embodiments of this invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the embodiments of the present invention.

[0057] Currently, the straps of wearable devices need to be able to adapt to different head sizes and shapes. Wearing comfort, stability, and adjustability are key indicators for users to evaluate wearable devices. How to develop an efficient, comfortable, and stable wearable all-in-one device that allows wearers to quickly, easily, and comfortably remove and put on VR headsets has become a pressing technical problem for the industry.

[0058] Existing headbands or straps require users to manually rotate knobs to adjust for comfort. Removing or putting on traditional wearable devices takes considerable time and effort, causing significant inconvenience. Furthermore, during intense use scenarios such as gaming, the headband or strap is prone to loosening or shifting, leading to blurred vision and poor light protection. Therefore, the need for automatic tightening or loosening of the straps during wearable device use, freeing users' hands for adjustment, is becoming increasingly urgent.

[0059] In view of this, embodiments of the present invention provide a strap tension adjustment mechanism. By pressing a button located on the housing, the clutch component moves from a first position to a second position. At this time, the adjusting wheel is disengaged from the drive component, and the user manually rotates the adjusting wheel to loosen the strap tension, thus facilitating its wearing on the head or wrist. After wearing, the drive component activates, driving the clutch component from the second position to the first position. At this time, the drive component is connected to the adjusting wheel, causing the adjusting wheel to rotate bidirectionally, thereby achieving automatic adjustment of the strap tension.

[0060] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0061] like Figure 1 As shown in the figure, an embodiment of the present invention proposes a strap tension adjustment mechanism, which includes:

[0062] The housing 100 has an internal mounting cavity;

[0063] An adjusting wheel 600 is disposed outside the housing 100 and is rotatably connected to the housing 100;

[0064] The clutch assembly 200 is slidably disposed in the mounting cavity and is drivenly connected to the adjusting wheel 600;

[0065] Button 300 is disposed on the outside of housing 100 and is movably connected to housing 100. Button 300 drives clutch assembly 200 to slide from a first position to a second position.

[0066] The drive assembly 400 is disposed on one side of the adjusting wheel 600 and drives the clutch assembly 200 to slide from the second position to the first position; in the first position, the drive assembly 400 is driven to connect with the adjusting wheel 600 to drive the adjusting wheel 600 to rotate in both directions; in the second position, the drive assembly 400 is disconnected from the adjusting wheel 600.

[0067] In this embodiment, pressing the button 300 on the housing 100 moves the clutch assembly 200 from a first position to a second position. At this time, the adjusting wheel 600 disengages from the drive assembly 400, allowing the user to manually rotate the adjusting wheel 600 to loosen the strap, making it convenient to wear on the head or wrist. After wearing, the drive assembly 400 activates, driving the clutch assembly 200 from the second position to the first position. The drive assembly 400 then connects to the adjusting wheel 600, causing it to rotate bidirectionally, thus automatically adjusting the strap tightness. This strap tightness adjustment mechanism replaces manual adjustment by the user's hands, enabling automatic tightening or loosening of the strap during wearable device use, which is simpler and more convenient than manual operation.

[0068] Specifically, the strap tension adjustment mechanism includes a housing 100, an adjusting wheel 600, a clutch assembly 200, a button 300, and a drive assembly 400. The housing 100 has an internal mounting cavity, within which the clutch assembly 200 and drive assembly 400 are disposed. The clutch assembly 200 is slidably disposed within the mounting cavity and can move from a first position to a second position to connect or disconnect the force transmission between the adjusting wheel 600 and the drive assembly 400. Understandably, when the clutch assembly 200 is in the first position, the driving force of the drive assembly 400 can be transmitted to the adjusting wheel 600 through the clutch assembly 200, thereby causing the adjusting wheel 600 to rotate and thus facilitating the adjustment of the strap tightness. When the clutch assembly 200 is in the second position, the drive assembly 400 is disengaged from the adjusting wheel 600, and the adjusting wheel 600 can be manually rotated to loosen the strap, making it convenient for the wearer to wear the wearable device on their head or wrist. After the wearer has finished wearing the device, the drive assembly 400 operates, driving the clutch assembly 200 to move from the second position to the first position, and then transmitting the driving force to the adjusting wheel 600 through the clutch assembly 200, causing the adjusting wheel 600 to rotate and adjust the strap tightness to ensure the wearer's comfort. In one embodiment, a sensor can also be provided to detect the wearing pressure of the strap in real time. The wearing pressure signal detected by the sensor is transmitted to the controller. After analysis by a series of algorithms, the controller controls the working state of the drive component 400, causing the adjusting wheel 600 to rotate clockwise or counterclockwise, thereby adjusting the tightness of the strap until the wearing pressure signal is within a preset range. It should be noted that the button 300 is elastically connected to the housing 100. That is, pressing the button 300 causes the button 300 to contact the clutch component 200, driving the clutch component 200 to move from the first position to the second position. After the clutch component 200 moves to the second position, the pressing pressure is released, and the button 300 automatically returns to its original position. The specific structure of the button 300 can refer to the structure of commonly used products on the market and is not limited here.

[0069] Furthermore, refer to Figure 1 In one embodiment of the present invention, the driving component 400:

[0070] The rotating structure 410 is rotatably disposed in the mounting cavity. In the first position, the rotating structure 410 is driven to connect with the adjusting wheel 600 to drive the adjusting wheel 600 to rotate in both directions. In the second position, the rotating structure 410 is disconnected from the adjusting wheel 600.

[0071] The limiting structure 420 is slidably disposed within the mounting cavity. During the movement of the clutch assembly 200 from the first position to the second position, the limiting structure 420 moves from the third position to the fourth position. In the third position, the limiting structure 420 locks the clutch assembly 200 to connect the rotating structure 410 and the adjusting wheel 600. In the fourth position, the limiting structure 420 releases the lock on the clutch assembly 200, allowing the clutch assembly 200 to move back to the second position.

[0072] The transmission structure 430 connects the rotating structure 410 and the limiting structure 420. The rotating structure 410 drives the limiting structure 420 from the fourth position to the third position through the transmission structure 430.

[0073] Specifically, the drive assembly 400 includes a rotating structure 410, a limiting structure 420, and a transmission structure 430. The rotating structure 410 is located within the mounting cavity and primarily provides driving force to rotate the adjusting wheel 600, thereby automatically adjusting the tightness of the strap. It can be understood that when the clutch assembly 200 moves to the first position, the rotating structure 410 is connected to the clutch assembly 200, thus transmitting driving force to the adjusting wheel 600 to drive its rotation. When the clutch assembly 200 moves to the second position, the rotating structure 410 is disconnected from the clutch assembly 200, and the driving force of the rotating structure 410 cannot be transmitted to the adjusting wheel 600, allowing the adjusting wheel 600 to be rotated manually, facilitating the wearer to place the wearable device on their head or wrist. In other words, regardless of whether it is the first or second position, the clutch assembly 200 is driven and connected to the adjusting wheel 600. For the rotating structure 410, the clutch assembly 200 is driven and connected to the rotating structure 410 in the second position to transmit driving force.

[0074] The limiting structure 420 is slidably disposed within the mounting cavity, and the sliding direction of the limiting structure 420 is perpendicular to the sliding direction of the clutch assembly 200. It can be understood that the limiting structure 420 can slide horizontally, while the clutch assembly 200 can slide vertically. When the limiting structure 420 slides to the third position, it abuts against the side wall of the clutch assembly 200, meaning the limiting structure 420 is located on one side of the sliding direction of the clutch assembly 200, and the limiting structure 420 and the clutch assembly 200 are tightly abutted. At this time, the clutch assembly 200 is in the first position and is driven by the rotating structure 410. The rotation of the rotating structure 410 drives the clutch assembly 200 to rotate synchronously, thereby driving the adjusting wheel 600 to rotate. When the limiting structure 420 slides to the fourth position, the limiting structure 420 is located at one end of the clutch assembly 200 along the sliding direction, that is, the end away from the adjusting wheel 600. At this time, the clutch assembly 200 moves to the second position and is separated from the drive structure. The rotating structure 410 cannot drive the clutch assembly 200 to rotate, and therefore cannot drive the adjusting wheel 600 to rotate.

[0075] The transmission structure 430 drives the limiting structure 420 to slide from the fourth position to the third position. It can be understood that when the clutch assembly 200 moves to the second position, the rotating structure 410 rotates, driving the limiting structure 420 from the fourth position to the third position via the transmission structure 430. When the limiting structure 420 moves to the third position, a space is formed on the side of the clutch assembly 200 away from the adjusting wheel 600, allowing the clutch assembly 200 to move away from the adjusting wheel 600. The clutch assembly 200 can then move from the second position to the first position under its own weight or the action of an elastic element.

[0076] Furthermore, refer to Figure 2 , Figure 3 , Figure 9 as well as Figure 10 In one embodiment of the present invention, the limiting structure 420 includes:

[0077] The limiting slider 421 is slidably disposed in the mounting cavity to switch between the third position and the fourth position;

[0078] The first elastic reset element 422 connects the limiting slider 421 and the housing 100; and

[0079] The second elastic reset element 423 connects the clutch assembly 200 and the housing 100;

[0080] In the third position, the limiting slider 421 is pressed against the outer periphery of the clutch assembly 200 by the first elastic reset member 422 to restrict the sliding of the clutch assembly 200; during the process of the clutch assembly 200 moving from the first position to the second position, the limiting slider 421 slides from the third position to the fourth position under the drive of the first elastic reset member 422; during the process of the limiting slider 421 moving from the fourth position to the third position, the clutch assembly 200 moves from the second position to the first position under the action of the second elastic reset member 423.

[0081] Specifically, the limiting structure 420 includes a limiting slider 421, a first elastic reset member 422, and a second elastic reset member 423. The limiting slider 421 is slidably disposed within the mounting cavity and can slide between a third position and a fourth position. The first elastic reset member 422 connects the limiting slider 421 and the housing 100. When the limiting slider 421 is in the third position, the clutch assembly 200 is in the first position, and the first elastic reset member 422 deforms to generate elastic force, causing the limiting slider 421 to abut against the side wall of the clutch assembly 200. During the movement of the clutch assembly 200 towards the second position under the action of the button 300, the limiting slider 421 moves from the third position towards the fourth position under the elastic force of the first elastic reset member 422 and abuts against the end of the clutch assembly 200. The movement of the limiting slider 421 from the fourth position towards the third position is driven by the rotating structure 410 through the transmission structure 430. Furthermore, the second elastic reset member 423 connects the clutch assembly 200 and the housing 100. When the clutch assembly 200 moves from the first position to the second position, the second elastic reset member 423 deforms and generates elastic force. During the movement of the limiting slider 421 from the fourth position to the third position, the clutch assembly 200 moves from the second position to the first position under the elastic force of the second elastic reset member 423. After the clutch assembly 200 moves to the first position, the limiting slider 421 abuts against the side wall of the clutch assembly 200. Due to the cooperative action of the first elastic reset member 422 and the second elastic reset member 423, the clutch assembly 200 remains fixed with the rotating structure 410, thereby transmitting the driving force of the rotating structure 410 to the adjusting wheel 600. In one embodiment, two limiting sliders 421 are provided, arranged side by side in the sliding direction of the limiting sliders 421. The transmission structure 430 can simultaneously drive the two limiting sliders 421 to move away from each other, so that the limiting sliders 421 move from the fourth position to the third position. At this time, each limiting slider 421 is provided with a first elastic reset member 422. It can be understood that when the clutch assembly 200 is in the first position, the two limiting sliders 421 are pressed against the opposite sides of the clutch assembly 200, which can improve the fixing reliability of the clutch assembly 200; when the clutch assembly 200 is in the second position, the two limiting sliders 421 are abutted against the end of the clutch assembly 200, thus preventing the limiting sliders 421 from moving towards the first position, so that the clutch assembly 200 is separated from the rotating structure 410, and the adjusting wheel 600 is manually rotated. In one embodiment, the first reset limiting member and the second elastic reset member 423 are both springs.

[0082] Furthermore, in one embodiment of the present invention, the limiting structure 420 includes a mounting groove disposed within the mounting cavity, and the limiting slider 421 and the first elastic reset member 422 are disposed within the mounting groove. Specifically, the mounting groove facilitates the installation of the first elastic reset member 422 and also limits its movement. It is understood that the housing 100 has an operating hole communicating with the mounting groove. When the button 300 is pressed, the button 300 passes through the operating hole and contacts the clutch assembly 200, thereby driving the clutch assembly 200 to move towards the second position.

[0083] Furthermore, Figure 2 , Figure 3 , Figure 4 as well as Figure 6 In one embodiment of the present invention, the transmission structure 430 includes:

[0084] The first actuating part 431 is disposed on the side of the rotating structure 410 facing the button 300, and multiple first actuating parts 431 are arranged in a circumferential array; and

[0085] The second pushing part 432 is provided on the limiting slider 421; during the rotation of the rotating structure 410, the first pushing part 431 and the second pushing part 432 cooperate to drive the limiting slider 421 to move toward the third position.

[0086] Specifically, the transmission structure 430 includes a first pushing part 431 and a second pushing part 432. The first pushing part 431 is disposed on the rotating structure 410, and multiple parts are arranged in a circumferential array on the side of the rotating structure 410 facing the button 300. The second pushing part 432 is disposed on the limiting slider 421. Both the first pushing part 431 and the second pushing part 432 are protrusions. Thus, when the rotating structure 410 rotates, the intermittent engagement of the two protrusions causes a change in the distance between the limiting slider 421 and the circumferential surface of the rotating structure 410, thereby driving the limiting slider 421 to move from the fourth position to the third position. It should be noted that the protrusion length is preferably greater than half the distance between the third and fourth positions to ensure that the transmission structure 430 can drive the limiting slider 421 to slide from the fourth position to the third position, thereby reserving movement space for the clutch assembly 200, allowing the clutch assembly 200 to move from the second position to the first position. In one embodiment, the first pushing part 431 and the second pushing part 432 are respectively provided with guide slopes that cooperate with each other. The guide slopes facilitate their cooperation.

[0087] Furthermore, refer to Figure 2 and Figure 7 In one embodiment of the present invention, the rotating structure 410 includes:

[0088] The worm gear 411 is rotatably disposed in the mounting cavity. In the first position, the worm gear 411 is driven to connect with the adjusting wheel 600 to drive the adjusting wheel 600 to rotate in both directions. In the second position, the worm gear 411 is disconnected from the adjusting wheel 600. The first pushing part 431 is disposed on the side of the worm gear 411 away from the adjusting wheel 600.

[0089] Worm 412 is rotatably disposed within the mounting cavity, and worm 412 meshes with worm wheel 411; and

[0090] The motor 413 is coaxially connected to the worm gear 412.

[0091] Specifically, the rotating structure 410 includes a worm gear 411, a worm 412, and a motor 413. The worm 412 is connected to the output shaft of the motor 413, and the worm 412 meshes with the worm gear 411. Thus, the rotation of the motor 413 can be transmitted to the worm gear 411 through the worm 412, driving the worm gear 411 to rotate. Because the engagement of the worm gear 411 and worm 412 has a self-locking function, meaning only the worm gear 412 can drive the worm gear 411, when the clutch assembly 200 is in the first position, although the worm gear 411 is connected to the adjusting wheel 600 through the clutch assembly 200, due to the self-locking function, the adjusting wheel 600 cannot drive the worm gear 411 to rotate. The worm gear 411 can drive the adjusting wheel 600 to rotate to adjust the tightness of the strap. The worm gear 411 has a first through hole through which the clutch assembly 200 passes and can slide. In one embodiment, the worm gear 411 has teeth on its side facing the limiting slider 421. The teeth are arranged in a circumferential array along the worm gear 411, forming a first pushing part 431. During the rotation of the worm gear 411, the teeth cooperate with the second pushing part 432 to drive the limiting slider 421 to slide.

[0092] Furthermore, refer to Figure 2 , Figure 5 , Figure 9 as well as Figure 10 In one embodiment of the present invention, the clutch assembly 200 includes:

[0093] The first clutch block 210 is located on the side of the rotating structure 410 facing the adjusting wheel 600; and

[0094] The second clutch block 220 is slidably disposed in the mounting cavity and drivenly connected to the adjusting wheel 600. The second elastic reset member 423 connects the second clutch block 220 and the housing 100. The rotating structure 410 is sleeved on the outside of the second clutch block 220. The button 300 drives the second clutch block 220 to slide from the first position to the second position. In the first and third positions, the second clutch block 220 is connected to the rotating structure 410, and the limiting structure 420 locks the second clutch block 220. In the second and fourth positions, the limiting structure 420 releases the lock of the second clutch block 220.

[0095] Specifically, the clutch assembly 200 includes a first clutch block 210 and a second clutch block 220. The first clutch block 210 is fixed to the worm gear 411, and has a second through hole communicating with the first through hole. The second clutch block 220 can slide within the first and second through holes to slide between a first position and a second position. Under the action of the second elastic reset member 423, the second clutch block 220 moves towards the second position. After reaching the second position, the limiting slider 421 abuts against the side wall of the second clutch block 220. The first clutch block 210 and the second clutch block 220 are fixedly connected, and the rotation of the worm gear 411 can drive the adjusting wheel 600 to rotate through the second clutch block 220. In one embodiment, the second through hole and / or the first through hole are non-circular holes. This ensures the sliding of the second clutch block 220 and also enables synchronous rotation between the second clutch block 220 and the worm gear 411.

[0096] Furthermore, refer to Figure 5 In one embodiment of the present invention, the first clutch block 210 is provided with a through hole 211, and the second clutch block 220 is movably disposed through the through hole 211. The peripheral wall of the through hole 211 of the first clutch block 210 is provided with a first meshing tooth 212, and the outer wall of the second clutch block 220 is provided with a second meshing tooth 221. In a first position, the first meshing tooth 212 and the second meshing tooth 221 are engaged and connected; in a second position, the first meshing tooth 212 and the second meshing tooth 221 are separated.

[0097] Specifically, the through hole 211 forms a second through hole. Through the engagement of the first meshing tooth 212 on the inner wall of the first clutch block 210 and the second meshing tooth 221 on the outer wall of the second clutch block 220, the second clutch block 220 and the worm gear 411 rotate synchronously, thereby driving the adjusting wheel 600 to rotate. That is, when the second clutch block 220 is in the first position, the first meshing tooth 212 and the second meshing tooth 221 engage, and the second clutch block 220 and the worm gear 411 rotate synchronously; when the second clutch block 220 is in the second position, the first meshing tooth 212 and the second meshing tooth 221 disengage, and the worm gear 411 cannot drive the second clutch block 220 to rotate.

[0098] Furthermore, refer to Figure 2In one embodiment of the present invention, the clutch assembly 200 further includes a connecting shaft 230, which connects the adjusting wheel 600 and the second clutch block 220. The second clutch block 220 is slidably sleeved on the outside of the connecting shaft 230. The connecting shaft 230 is non-cylindrical. Specifically, the connecting shaft 230 connects to the adjusting wheel 600, and the second clutch block 220 is slidably sleeved on the outside of the connecting shaft 230. The connecting shaft 230 is non-cylindrical and can be a diagonal prism or a triangular prism, etc. This allows for a sliding connection between the second clutch block 220 and the connecting shaft 230, and also enables synchronous rotation of the second clutch block 220 and the connecting shaft 230, thereby driving the adjusting wheel 600 to rotate.

[0099] Furthermore, refer to Figure 2 In one embodiment of the present invention, the strap tension adjustment mechanism further includes a third elastic reset member 500, which connects the adjusting wheel 600 and the housing 100. Specifically, the adjusting wheel 600 is connected to the housing 100 via the third elastic reset member 500. When the adjusting wheel 600 rotates, the elastic force of the third elastic reset member 500 can be used to tighten the strap. In one embodiment, the third elastic reset member 500 is a spiral spring.

[0100] Furthermore, refer to Figure 2 as well as Figure 8-10 In one embodiment of the present invention, the housing 100 includes an upper housing 110 and a lower housing 120 that are detachably connected, and the upper housing 110 and the lower housing 120 are fastened together to form a mounting cavity. To facilitate the assembly and disassembly of the various components in the strap tension adjustment mechanism, the housing 100 includes an upper housing 110 and a lower housing 120, which are fastened together to form a mounting cavity. Preferably, the upper housing 110 and the lower housing 120 are detachably connected, such as by snap-fit ​​or screw connection, etc., which is not limited herein.

[0101] In one embodiment, reference is made to Figure 9 and Figure 10 The working process of the strap tension adjustment mechanism is as follows:

[0102] Before wearing, i.e. in the initial state, the limiting slider 421 is in the third position, abutting against the side wall of the second clutch block 220 under the action of the first elastic reset member 422. At the same time, the second elastic reset member 423 applies force to the second clutch block 220. Under the cooperative action of the second elastic reset member 423 and the first elastic reset member 422, the second clutch block 220 is held in the first position. The second clutch block 220 is engaged with the first clutch block 210, and the motor 413 does not work. Due to the self-locking function of the worm gear 411 and worm 412 transmission, the adjusting wheel 600 cannot be manually rotated.

[0103] When the device needs to be worn, press button 300. Button 300 pushes the second clutch block 220 to move a predetermined distance toward the second position. After this movement, the second clutch block 220 separates from the first clutch block 210, and the limiting slider 421 moves toward the fourth position under the elastic force of the first elastic reset member 422. When the second clutch block 220 moves toward the second position, the second elastic reset member 423 is compressed and deformed, causing the second clutch block 220 to tend to move toward the first position. However, because the limiting slider 421 occupies the space for the second clutch block 220 to move toward the first position, the second clutch block 220 remains separated from the first clutch block 210. At this time, the strap can be freely opened or tightened by rotating the 600 adjustment wheel, making it convenient for the user to wear the device on their head or wrist.

[0104] After the strap is worn, the motor 413 operates, and the worm gear 412 drives the worm wheel 411 to rotate. The first pushing part 431 and the second pushing part 432 cooperate to drive the limiting slider 421 to move towards the third position, providing movement space for the second clutch block 220. Under the elastic force of the second elastic reset member 423, the second clutch block 220 moves towards the first position. At this time, the limiting slider 421 is pressed against the side wall of the second clutch block 220 by the first elastic reset member 422, while the second elastic reset member 423 applies force to the second clutch block 220 to prevent it from moving towards the second position. Under the synergistic action of the first elastic reset member 422 and the second elastic reset member 423, the second clutch block 220 and the first clutch block 210 remain engaged. The second clutch block 220 rotates synchronously with the worm wheel 411, thereby driving the adjusting wheel 600 to rotate, realizing the automatic adjustment of the strap tightness.

[0105] To achieve the above objectives, this invention provides an adjustable strap, comprising a strap body and a strap tension adjustment mechanism connected to the strap body. The strap tension adjustment mechanism is the same as described above, wherein the strap body is engaged with an adjustment wheel, thereby adjusting the tension of the strap body by rotating the adjustment wheel. Preferably, there are two strap bodies, each engaged with the adjustment wheel. By rotating the adjustment wheel, the two strap bodies move towards or away from each other, thereby adjusting the tension. Specifically, the specific structure of the strap tension adjustment mechanism is as described in the above embodiments. Since this adjustable strap adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. In one embodiment, the strap body can be a headband or a wristband, without limitation.

[0106] To achieve the above objectives, this invention provides a wearable device, comprising a main unit, a strap connected to the main unit, and a strap tension adjustment mechanism connected to the strap. The strap tension adjustment mechanism is the same as described above, wherein the strap engages with an adjusting wheel, thus adjusting the tightness of the strap by rotating the adjusting wheel. Specifically, the specific structure of the strap tension adjustment mechanism is as described in the above embodiments. Since this wearable device adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. In one embodiment, the wearable device can be a headband display device or a wrist-worn display device; no limitation is made here.

[0107] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the inventive concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A strap tension adjustment mechanism, characterized in that, The strap tension adjustment mechanism includes: The casing has an internal mounting cavity. An adjusting wheel is disposed outside the housing and is rotatably connected to the housing; The clutch assembly is slidably disposed within the mounting cavity and drivenly connected to the adjusting wheel; A button is disposed on the outside of the housing and is movably connected to the housing. The button drives the clutch assembly to slide from a first position to a second position. A drive assembly is disposed on one side of the adjusting wheel and drives the clutch assembly to slide from the second position to the first position; in the first position, the drive assembly is driven to the adjusting wheel to drive the adjusting wheel to rotate in both directions; in the second position, the drive assembly is disconnected from the adjusting wheel. The driving component: A rotating structure is rotatably disposed within the mounting cavity. In the first position, the rotating structure is driven to the adjusting wheel to drive the adjusting wheel to rotate bidirectionally. In the second position, the rotating structure is disconnected from the adjusting wheel. A limiting structure is slidably disposed within the mounting cavity. During the movement of the clutch assembly from the first position to the second position, the limiting structure moves from the third position to the fourth position. In the third position, the limiting structure locks the clutch assembly to connect the rotating structure and the adjusting wheel. In the fourth position, the limiting structure releases the lock on the clutch assembly, allowing the clutch assembly to move back to the second position. A transmission structure connects the rotating structure and the limiting structure, wherein the rotating structure drives the limiting structure to move from the fourth position to the third position via the transmission structure.

2. The strap tension adjustment mechanism as described in claim 1, characterized in that, The limiting structure includes: A limiting slider is slidably disposed within the mounting cavity to switch between the third position and the fourth position; A first elastic reset element connects the limiting slider and the housing; and A second elastic reset element connects the clutch assembly and the housing; In the third position, the limiting slider is pressed against the outer periphery of the clutch assembly by the first elastic reset member to restrict the sliding of the clutch assembly; during the process of the clutch assembly moving from the first position to the second position, the limiting slider slides from the third position to the fourth position under the drive of the first elastic reset member; during the process of the limiting slider moving from the fourth position to the third position, the clutch assembly moves from the second position to the first position under the action of the second elastic reset member.

3. The strap tension adjustment mechanism as described in claim 2, characterized in that, The limiting structure includes a mounting groove disposed in the mounting cavity, and the limiting slider and the first elastic reset member are disposed in the mounting groove; and / or, two limiting sliders are disposed opposite each other, each limiting slider is provided with a first elastic reset member, and the two limiting sliders can move toward each other or away from each other.

4. The strap tension adjustment mechanism as described in claim 2, characterized in that, The transmission structure includes: A first actuating part is disposed on the side of the rotating structure facing the button, and multiple first actuating parts are arranged in a circumferential array; and The second pushing part is provided on the limiting slider; during the rotation of the rotating structure, the first pushing part and the second pushing part cooperate to drive the limiting slider to move toward the third position.

5. The strap tension adjustment mechanism as described in claim 4, characterized in that, The rotating structure includes: A worm gear is rotatably disposed within the mounting cavity. In the first position, the worm gear is driven to connect with the adjusting wheel to drive the adjusting wheel to rotate bidirectionally. In the second position, the worm gear is disconnected from the adjusting wheel. The first pushing part is disposed on the side of the worm gear away from the adjusting wheel. A worm gear, rotatably disposed within the mounting cavity, meshes with the worm wheel; and The motor is coaxially connected to the worm gear.

6. The strap tension adjustment mechanism as described in claim 2, characterized in that, The clutch assembly includes: The first clutch block is located on the side of the rotating structure facing the adjusting wheel; and The second clutch block is slidably disposed within the mounting cavity and drivenly connected to the adjusting wheel. The second elastic reset member connects the second clutch block and the housing. The rotating structure is sleeved on the outside of the second clutch block. The button drives the second clutch block to slide from the first position to the second position. In the first position and the third position, the second clutch block is connected to the rotating structure, and the limiting structure locks the second clutch block. In the second position and the fourth position, the limiting structure releases the lock of the second clutch block.

7. The strap tension adjustment mechanism as described in claim 6, characterized in that, The first clutch block has a through hole, and the second clutch block is movably inserted through the through hole. The peripheral wall of the through hole of the first clutch block has a first meshing tooth, and the outer wall of the second clutch block has a second meshing tooth. In the first position, the first meshing tooth and the second meshing tooth are engaged and connected; in the second position, the first meshing tooth and the second meshing tooth are separated.

8. The strap tension adjustment mechanism as described in claim 6, characterized in that, The clutch assembly further includes a connecting shaft that connects the adjusting wheel and the second clutch block. The second clutch block is slidably sleeved on the outside of the connecting shaft. The connecting shaft is a non-cylindrical body.

9. A wearable device, characterized in that, The wearable device includes a device host, a strap connected to the device host, and a strap tension adjustment mechanism connected to the strap, wherein the strap tension adjustment mechanism is the strap tension adjustment mechanism as described in any one of claims 1-8.

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