Tightness adjusting mechanism and wearable device

Abstract

The invention discloses a tightness adjusting mechanism and wearable equipment, and belongs to the technical field of wearable equipment, and the tightness adjusting mechanism comprises an adjusting rod, a first driving unit and a shell; the shell comprises a first shell and a second shell which are separately arranged; one end of the adjusting rod is movably arranged on the first shell, and the other end of the adjusting rod is connected with the second shell; the first driving unit is arranged on the first shell, and the first driving unit is used for driving the adjusting rod to move relative to the first shell so as to change the distance between the first shell and the second shell.

Description

Technical Field

[0001] This application belongs to the technical field of wearable devices, and particularly relates to a tension adjustment mechanism and a wearable device. Background Art

[0002] With the continuous development of wearable devices, consumers have higher and higher requirements for the functions of wearable devices. To meet the needs of consumers, more functional devices are integrated into wearable devices, so that wearable devices have more functions, thereby improving the performance of wearable devices.

[0003] In related technologies, a wearable device includes a device body and a tension adjustment mechanism. The tension adjustment mechanism is connected to the device body, and the tension adjustment mechanism is used to realize the wearing of the wearable device. The tension adjustment mechanism usually includes an adjustment cable and a cable winding wheel for winding the cable. At this time, the length of the tension adjustment mechanism is adjusted by winding the adjustment cable around the cable winding wheel.

[0004] However, during the adjustment of the tension adjustment mechanism, when the adjustment cable is wound around the cable winding wheel or falls off from the cable winding wheel, the adjustment cable is prone to the risk of self-knotting or winding around other components. Therefore, there is a risk of breakage or jamming of the adjustment cable. Therefore, the safety and reliability of the tension adjustment mechanism in related technologies are poor. Summary of the Invention

[0005] The purpose of the embodiments of this application is to provide a tension adjustment mechanism and an electronic device, which can solve the technical problem of poor safety and reliability of the tension adjustment mechanism.

[0006] To solve the above technical problems, this application is implemented as follows: In a first aspect, this application discloses a tension adjustment mechanism, including an adjustment rod, a first driving unit, and a housing; The housing includes a first housing and a second housing that are separately arranged; One end of the adjustment rod is movably arranged in the first housing, and the other end of the adjustment rod is connected to the second housing; the first driving unit is arranged on the first housing, and the first driving unit is used to drive the adjustment rod to move relative to the first housing to change the distance between the first housing and the second housing.

[0007] In a second aspect, this application discloses a wearable device, including the above-mentioned tension adjustment mechanism.

[0008] In the embodiment of the present application, the position between the adjusting rod and the first housing is adjusted by the first driving unit to achieve the tightness adjustment of the tightness adjustment mechanism. The adjusting rod has a certain rigidity compared with the adjusting cable, so there is no risk of knotting or winding around other components. Therefore, compared with the tightness adjustment mechanism in the related art, the tightness adjustment mechanism disclosed in the present application is not likely to break or jam, and thus has better safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of a tightness adjustment mechanism disclosed in an embodiment of the present application; Figure 2 is a schematic structural diagram of a knob adjustment unit of a tightness adjustment mechanism disclosed in an embodiment of the present application; Figure 3 is a cross-sectional view of a knob adjustment unit of a tightness adjustment mechanism disclosed in an embodiment of the present application; Figure 4 and Figure 5 is a schematic structural diagram of some components of a knob adjustment unit of a tightness adjustment mechanism disclosed in an embodiment of the present application; Figure 6 is Figure 1 a cross-sectional view taken along the line B-B in Figure 7 and Figure 8 is Figure 1 a cross-sectional view taken along the line A-A in Figure 9 is a schematic diagram showing the connection between a tightness adjustment mechanism and a strap disclosed in an embodiment of the present application.

[0010] Description of the Reference Numerals: 100 - Tightening adjustment mechanism, 110 - Adjusting rod, 1101 - First adjusting rod, 1102 - Second adjusting rod, 111 - Rack section, 112 - Smooth rod section, 120 - First driving unit, 130 - Housing, 131 - First housing, 132 - Second housing, 140 - Second driving unit, 150 - Knob adjustment unit, 151 - Operating knob, 1511 - Knob body, 1512 - Third limiting part, 152 - First gear, 1521 - First limiting protrusion, 153 - Mounting base, 153a - Mounting plate, 153b - Annular protrusion, 1531 - Accommodating groove, 1531a - First limiting part, 1532 - First limiting chute, 1533 - Second limiting chute, 1534 - Through hole, 154 - Self-locking part, 154a - Second limiting part, 1541 - Connecting ring, 1542 - Arc-shaped part, 15421 - First end, 15422 - Second end, 15423 - Notch, 1543 - Buffer gap, 1544 - Buffer piece, 155 - Second gear, 156 - Third gear, 1561 - Second limiting protrusion, 160 - Toggle switch adjustment unit, 161 - Toggle switch, 1611 - Switch body, 1612 - Matching part, 16121 - Second guiding slope, 162 - Slide rail, 163 - Limiting structure, 1631 - Limiting groove, 164 - Elastic component, 1641 - Elastic part, 1642 - Slide block, 16421 - First guiding slope, 1643 - Sliding part, 165 - Connecting rod; 210 - First strap, 220 - Second strap, 230 - Elastic band. Specific embodiments

[0011] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0012] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0013] Next, in conjunction with the accompanying drawings, the tightening adjustment mechanism and the electronic device provided in the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.

[0014] Please refer to Figures 1 to 9 , an embodiment of the present application discloses a tension adjusting mechanism 100, which is applied to a wearable device. The disclosed tension adjusting mechanism 100 includes an adjusting rod 110, a first driving unit 120, and a housing 130.

[0015] The housing 130 includes a first housing 131 and a second housing 132 that are separately arranged. One end of the adjusting rod 110 is movably arranged in the first housing 131, and the other end of the adjusting rod 110 is connected to the second housing 132. The first driving unit 120 is arranged on the first housing 131, and the first driving unit 120 is used to drive the adjusting rod 110 to move relative to the first housing 131 to change the distance between the first housing 131 and the second housing 132.

[0016] During the specific operation process, when the first driving unit 120 drives the adjusting rod 110 to move in the direction from the first housing 131 to the second housing 132, the distance between the first housing 131 and the second housing 132 increases, so that the length of the tension adjusting mechanism 100 increases. As Figure 1 shown, the direction from the first housing 131 to the second housing 132 is the direction from right to left. At this time, the distance between the first housing 131 and the second housing 132 gradually increases.

[0017] When the first driving unit 120 drives the adjusting rod 110 to move in the direction from the second housing 132 to the first housing 131, the distance between the first housing 131 and the second housing 132 shortens, so that the length of the tension adjusting mechanism 100 shortens. As Figure 1 shown, the direction from the second housing 132 to the first housing 131 is the direction from left to right. At this time, the distance between the first housing 131 and the second housing 132 gradually decreases.

[0018] In a specific solution, both the first housing 131 and the second housing 132 can be connected to the device main body of the wearable device. At this time, the device main body, the first housing 131, the adjusting rod 110, and the second housing 132 can form a ring structure, so that the user can wear it.

[0019] Alternatively, in another solution, the wearable device further includes a first strap 210 and a second strap 220. The first strap 210 and the second strap 220 are connected to both sides of the device main body. The first housing 131 can be connected to the first strap 210, and the second housing 132 can be connected to the second strap 220. At this time, the device main body, the first strap 210, the adjusting rod 110, and the second strap 220 can form a ring structure, so as to realize user wearing.

[0020] In the embodiments disclosed in the present application, the adjusting rod 110 has a certain rigidity compared to the adjusting cable in the related art. Therefore, there is no risk of knotting or winding around other components. Therefore, compared with the tension adjusting mechanism 100 in the related art, the tension adjusting mechanism 100 disclosed in the present application is not prone to breakage or jamming risks. Therefore, the tension adjusting mechanism 100 disclosed in the present application has better safety and reliability.

[0021] In addition, the adjusting rod 110 can also expand the strap of the wearable device, thus avoiding the risk of the strap winding, and making the tension adjusting mechanism 100 have a better three-dimensional effect.

[0022] In another alternative solution, the number of the adjusting rods 110 can be at least two, namely a first adjusting rod 1101 and a second adjusting rod 1102. The first adjusting rod 1101 and the second adjusting rod 1102 can be arranged in parallel. The first driving unit 120 can be connected to both the first adjusting rod 1101 and the second adjusting rod 1102, and the first driving unit 120 can drive the first adjusting rod 1101 and the second adjusting rod 1102 to move simultaneously. The synchronous movement here means moving simultaneously and in the same direction.

[0023] In this solution, the number of the adjusting rods 110 being two can achieve a wider support range. Therefore, when the user wears it, the pressure on the user's wearing area is reduced, which is beneficial to improving the user experience.

[0024] In the above solution, the first driving unit 120 can be components such as a driving motor and a motor.

[0025] In another alternative embodiment, the tension adjusting mechanism 100 can further include a second driving unit 140. The second driving unit 140 can be arranged on the second housing 132, and the second driving unit 140 can be used to drive the adjusting rod 110 to move relative to the second housing 132 to change the distance between the second housing 132 and the first housing 131.

[0026] In the specific operation process, when the second driving unit 140 drives the adjusting rod 110 to move in the direction from the second housing 132 to the first housing 131, the distance between the second housing 132 and the first housing 131 increases, so that the length of the tension adjusting mechanism 100 increases. When the second driving unit 140 drives the adjusting rod 110 to move in the direction away from the second housing 132 to the first housing 131, the distance between the first housing 131 and the second housing 132 shortens, so that the length of the tension adjusting mechanism 100 shortens. The first driving unit 120, the second driving unit 140, the first housing 131 and the second housing 132 in this article are not limited to... Figure 1In the position shown, the first housing 131 and the first drive unit 120 can be located Figure 1 on the left side in Figure 1 , and the second drive unit 140 and the second housing 132 can be located

[0027] on the right side in. The specific positions of the first drive unit 120, the second drive unit 140, the first housing 131, and the second housing 132 are not limited in this article.

[0028] In the above embodiment, when the number of the adjusting rods 110 is at least two, the second drive unit 140 can be connected to both the first adjusting rod 1101 and the second adjusting rod 1102. At this time, the second drive unit 140 can also drive the first adjusting rod 1101 and the second adjusting rod 1102 to move synchronously.

[0029] In another alternative solution, the adjustment accuracy of the first drive unit 120 can be greater than that of the second drive unit 140. Here, it can be understood that the moving accuracy of the first drive unit 120 driving the adjusting rod 110 is higher than that of the second drive unit 140 driving the adjustment. It can also be understood that the unit moving distance of the first drive unit 120 driving the adjusting rod 110 is less than the unit moving distance of the second drive unit 140 driving the adjusting rod 110. The unit moving distance here refers to the distance that the adjusting rod 110 moves each time it is driven. It can also be understood as the minimum driving distance of the first drive unit 120 and the second drive unit 140 for the adjusting rod 110. Or, it can also be understood that the adjustment range of the first drive unit 120 can be smaller than that of the second drive unit 140. At this time, the moving range of the first drive unit 120 driving the adjusting rod 110 is smaller, so the adjustment accuracy is greater, and thus fine adjustment is achieved. While the moving range of the second drive unit 140 driving the adjusting rod 110 is larger, so the adjustment accuracy is smaller, and thus coarse adjustment is achieved.

[0030] In this solution, the first driving unit 120 drives the adjusting rod 110 with a smaller unit moving distance, so the position adjustment of the adjusting rod 110 is more precise. While the second driving unit 140 drives the adjusting rod 110 with a larger unit moving distance, so the position adjustment of the adjusting rod 110 is relatively rough. Therefore, the first driving unit 120 is used to achieve the fine adjustment or micro-adjustment of the tightness adjusting mechanism 100, and the second driving unit 140 is used to achieve the coarse adjustment of the tightness adjusting mechanism 100. For example, through the coarse adjustment of the second driving unit 140, the wearable device can be just worn on the user's body, such as just being able to be worn on the wrist or head. At this time, the wearable device is not likely to fall off the wrist or head. Then, through the fine adjustment or micro-adjustment of the first driving unit 120, the wearable device can be worn more tightly and comfortably on the user's body, thereby further improving the wearing reliability and comfort. Therefore, through the coarse adjustment of the tightness adjusting mechanism 100, the initial wearing of the wearable device can be realized, avoiding the risk of the wearable device slipping off the user's body. In addition, through the fine adjustment of the tightness adjusting mechanism 100, a more comfortable wearing experience can be realized. Therefore, the tightness adjusting mechanism 100 in this application can further improve the wearing reliability and comfort of the wearable device.

[0031] In the above solution, the unit moving distance of the first driving unit 120 driving the adjusting rod 110 can be 1 cm, and the unit moving distance of the second driving unit 140 driving the adjusting rod 110 can be 10 cm. Of course, the unit distance of the first driving unit 120 driving the adjusting rod 110 and the distance of the second driving unit 140 driving the adjusting rod 110 can also be other values, which are not limited in this article. Or, the moving range of the first driving unit 120 driving the adjusting rod 110 can be between 0 and 5 cm, while the moving range of the second driving unit 140 driving the adjusting rod 110 can be between 0 and 20 mm.

[0032] In an alternative solution, the second driving unit 140 can be a knob adjusting unit 150. The knob adjusting unit 150 can include an operation knob 151 and a first gear 152. The operation knob 151 and the first gear 152 can rotate relative to the second housing 132. Here, it can also be understood that the operation knob 151 and the first gear 152 can be rotatably connected to the second housing 132. The adjusting rod 110 can have a rack section 111 meshing with the first gear 152. Here, the adjusting rod 110 can be an overall rack, or a partial area of the adjusting rod 110 is a rack structure. The first gear 152 can rotate with the rotation of the operation knob 151 to drive the adjusting rod 110 to move relative to the second housing 132.

[0033] During the specific operation process, when the driving operation knob 151 rotates around the first rotation direction, the operation knob 151 drives the first gear 152 to rotate, and the first gear 152 drives the rack segment 111 to move towards the direction of the second housing 132, thereby driving the adjusting rod 110 to move towards the direction of the second housing 132, so as to shorten the distance between the first housing 131 and the second housing 132. When the driving operation knob 151 rotates around the second rotation direction opposite to the first rotation direction, the operation knob 151 drives the first gear 152 to rotate, and the first gear 152 drives the rack segment 111 to move towards the direction of the first housing 131, thereby driving the adjusting rod 110 to move towards the direction of the first housing 131, so as to increase the distance between the first housing 131 and the second housing 132. One of the first rotation direction and the second rotation direction is clockwise rotation, and the other is counterclockwise rotation.

[0034] In this solution, manual adjustment can be achieved through the operation knob 151 and the first gear 152, so that the tension adjusting mechanism 100 does not need to be provided with a circuit structure, thus making the structure of the tension adjusting mechanism 100 relatively simple. At the same time, the second driving unit 140 does not need electricity, so it is also beneficial to reduce the energy consumption of the wearable device.

[0035] Similarly, the first driving unit 120 can also be a knob adjusting unit 150. Specifically, the operation knob 151 and the first gear 152 can rotate relative to the first housing 131, and here it can also be understood that the operation knob 151 and the first gear 152 can be rotatably connected to the first housing 131. The adjusting rod 110 can have a rack segment 111 meshing with the first gear 152, and the rack segment 111 here refers to the part of the adjusting rod 110 connected to the first housing 131. The first gear 152 can rotate with the rotation of the operation knob 151 to drive the adjusting rod 110 to move relative to the first housing 131. At this time, the first driving unit 120 is also a manual operation structure, so it is beneficial to further simplify the structure of the tension adjusting mechanism 100 and at the same time can further reduce the energy consumption of the wearable device.

[0036] In the above solution, both the operation knob 151 and the first gear 152 can be rotatably connected to the first housing 131 or the second housing 132. At this time, the operation knob 151 and the first gear 152 can be directly assembled on the first housing 131 or the second housing 132.

[0037] In another alternative solution, the knob adjustment unit 150 may further include a mounting base 153. The operating knob 151 and the first gear 152 may be rotatably connected to the mounting base 153, and the mounting base 153 is fixedly connected to the first housing 131 or the second housing 132. For example, the mounting base 153 may be fixed to the first housing 131 or the second housing 132 by means of components such as screws and rivets. In this solution, the mounting base 153 serves as the mounting foundation of the knob adjustment unit 150, and other components of the knob adjustment unit 150 are all mounted on the mounting base 153, so that the knob adjustment unit 150 forms a modular structure, which facilitates the assembly of the knob adjustment unit 150 with the first housing 131 or the second housing 132.

[0038] In the above embodiment, accidental operation of the operating knob 151 is likely to cause the operating knob 151 to rotate accidentally, which may easily lead to the risk of accidental elongation of the tightening adjustment mechanism 100, and thus may easily cause the risk of accidental detachment of the wearable device from the user's body.

[0039] Based on this, in another alternative embodiment, the knob adjustment unit 150 may further include a self-locking member 154. The mounting base 153 may be provided with a receiving groove 1531, and a first limiting portion 1531a may be provided on the side wall of the receiving groove 1531. The self-locking member 154 may be located in the receiving groove 1531 and may be rotatable relative to the mounting base 153. The self-locking member 154 may be provided with a second limiting portion 154a, and the first limiting portion 1531a is matched with the second limiting portion 154a. Here, the matching means that the first limiting portion 1531a and the second limiting portion 154a are in contact or abut against each other. The operating knob 151 may be connected to the self-locking member 154.

[0040] During the specific operation process, when the rotational force of the operating knob 151 overcomes the force between the first limiting portion 1531a and the second limiting portion 154a, the self-locking member 154 rotates along with the rotation of the operating knob 151. That is to say, when the driving force of the operating knob 151 is greater than the frictional force between the first limiting portion 1531a and the second limiting portion 154a, the first limiting portion 1531a and the second limiting portion 154a do not limit the operating knob 151, and the operating knob 151 can drive the self-locking member 154 to rotate together. When the driving force of the operating knob 151 is less than the frictional force between the first limiting portion 1531a and the second limiting portion 154a, a limit is formed between the first limiting portion 1531a and the second limiting portion 154a, thereby restricting the rotation of the operating knob 151.

[0041] In this solution, the frictional force between the second limiting portion 154a on the self-locking member 154 and the first limiting portion 1531a on the mounting base 153 can achieve self-locking of the adjusting rod 110, thus avoiding the risk of accidental elongation of the tightening and loosening adjusting mechanism 100 caused by accidental rotation of the operation knob 151, and further improving the reliability of the tightening and loosening adjusting mechanism 100.

[0042] In another alternative solution, the operation knob 151 may include a knob body 1511 and a third limiting portion 1512 connected to each other. The third limiting portion 1512 may be inserted between the side wall of the receiving groove 1531 and the outer peripheral surface of the self-locking member 154, and the third limiting portion 1512 is in limiting cooperation with the second limiting portion 154a along the rotation direction of the operation knob 151. In this solution, the rotational force of the operation knob 151 is directly applied to the second limiting portion 154a through the third limiting portion 1512, so it is more convenient to drive the operation knob 151 to rotate.

[0043] In one embodiment, the self-locking member 154 may include a connecting ring 1541 and an arc-shaped member 1542. The arc-shaped member 1542 may be sleeved on the outer periphery of the connecting ring 1541. The arc-shaped member 1542 may have a first end 15421 and a second end 15422. The second limiting portion 154a described above may be provided at the first end 15421, and a buffer gap 1543 may be provided between the first end 15421 and the connecting ring 1541. The second limiting portion 154a provided at the first end 15421 may be in limiting cooperation with the first limiting portion 1531a provided inside the mounting base 153 along the rotation direction of the operation knob 151, and the second limiting portion 154a provided at the first end 15421 may be in limiting cooperation with the third limiting portion 1512 along the rotation direction of the operation knob 151.

[0044] In the specific operation process, when the operation knob 151 rotates, due to the buffer gap 1543 between the first end 15421 of the arc-shaped member 1542 and the connecting ring 1541, when the third limiting portion 1512 applies pressure to the second limiting portion 154a, the first end 15421 will deform, causing the first limiting portion 1531a and the second limiting portion 154a to separate from each other, thus facilitating the rotation of the operation knob 151. When the operation knob 151 drives the adjusting rod 110 to move to a predetermined position, the operation knob 151 stops rotating, and the third limiting portion 1512 removes the pressure on the second limiting portion 154a, so that the first end 15421 resumes deformation, and therefore the first limiting portion 1531a and the second limiting portion 154a are in contact again.

[0045] In this solution, the operation knob 151 can force the first limiting portion 1531a and the second limiting portion 154a to separate during rotation, thereby improving the smoothness of rotation of the operation knob 151.

[0046] Furthermore, a notch 15432 is formed between the first end portion 15421 and the second end portion 15422, and a buffer gap 1543 may also be provided between the second end portion 15422 and the connecting ring 1541. At this time, the buffer gap 1543 between the first end portion 15421 and the connecting ring 1541 and the buffer gap 1543 between the second end portion 15422 and the connecting ring 1541 are both in communication with the notch 15432. The second end portion 15422 may also be provided with a second limiting portion 154a.

[0047] The number of the above-mentioned third limiting portions 1512 may be two. The second limiting portion 154a provided on the first end portion 15421 and the second limiting portion 154a provided on the second end portion 15422 are located between the two third limiting portions 1512. One of the third limiting portions 1512 abuts against the second limiting portion 154a provided on the first end portion 15421, and the other third limiting portion 1512 abuts against the second limiting portion 154a provided on the second end portion 15422.

[0048] In the specific operation process, when the operation knob 151 rotates in the first rotation direction, the third limiting portion 1512 abutting against the second limiting portion 154a of the first end portion 15421 can apply a force to the second limiting portion 154a provided on the first end portion 15421, so that the first end portion 15421 deforms, so that the second limiting portion 154a provided on the first end portion 15421 is separated from the first limiting portion 1531a, thus facilitating rotation. At the same time, the second limiting portion 154a provided on the second end portion 15422 still abuts against the first limiting portion 1531a, so it has a certain damping effect to maintain the feel of mechanical rotation.

[0049] Similarly, when the operation knob 151 rotates in the second rotation direction, the third limiting portion 1512 abutting against the second limiting portion 154a of the second end portion 15422 can apply a force to the second limiting portion 154a provided on the second end portion 15422, so that the second end portion 15422 deforms, so that the second limiting portion 154a provided on the second end portion 15422 is separated from the first limiting portion 1531a, thus facilitating rotation. At the same time, the second limiting portion 154a provided on the first end portion 15421 still abuts against the first limiting portion 1531a, so it has a certain damping effect to maintain the feel of mechanical rotation.

[0050] In another alternative solution, the second limiting portion 154a may be a toothed portion provided on the outer peripheral surface of the self-locking member 154, and the first limiting portion 1531a may be a toothed structure provided on the side wall of the receiving groove 1531. At this time, the side wall of the receiving groove 1531 may be provided with a toothed structure in some areas, or the entire annular side wall of the receiving groove 1531 may be provided with a toothed structure. It can also be understood that the side wall of the receiving groove 1531 is an annular toothed surface. The toothed portion can be engaged with the toothed structure.

[0051] This solution enables the self-locking member 154 and the mounting base 153 to have better self-locking performance, thus further avoiding the risk of accidental elongation of the tightening and loosening adjustment mechanism 100.

[0052] Of course, the first limiting portion 1531a and the second limiting portion 154a are not limited to being tooth-shaped, and may also be protrusion structures, for example, dot-shaped, column-shaped or boss-shaped protrusion structures. The specific structures of the first limiting portion 1531a and the second limiting portion 154a are not limited in this article.

[0053] In another alternative solution, the self-locking member 154 may further include a buffer sheet 1544, and the buffer sheet 1544 may be disposed in the buffer gap 1543. In this solution, the buffer sheet 1544 can provide a buffering effect on the first end portion 15421, avoiding damage to the first end portion 15421 due to a large impact force, thereby improving the safety of the connecting belt assembly.

[0054] Optionally, the buffer sheet 1544 can be made of materials such as foam and rubber.

[0055] In the above solution, the first gear 152 may be coaxially arranged with the operation knob 151, that is to say, the first gear 152 may be directly connected to the operation knob 151. Here, the first gear 152 is the driving gear. In a specific solution, a through hole 1534 may be opened at the bottom of the above-mentioned receiving groove 1531, and a connection key may be provided on the first gear 152. The connection key passes through the through hole 1534 and is connected to the operation knob 151. Alternatively, the connection key passes through the through hole 1534 and is connected to the above-mentioned self-locking member 154. Specifically, the connection key can be inserted into the key groove opened in the connection ring 1541. At this time, when the self-locking member 154 rotates with the operation knob 151, the self-locking member 154 synchronously drives the first gear 152 to rotate. Of course, the first gear 152 and the self-locking member 154 or the operation knob 151 can also be fixedly connected by structures such as screws.

[0056] In another alternative embodiment, the knob adjustment unit 150 may further include a second gear 155 coaxially arranged with the operation knob 151. The second gear 155 may be engaged with the first gear 152. The second gear 155 may rotate synchronously with the operation knob 151 to drive the first gear 152 to rotate, thereby driving the adjustment rod 110 to move. The module of the first gear 152 may be greater than the module of the second gear 155. At this time, the second gear 155 is the driving gear and the first gear 152 is the driven gear. The above-mentioned connection key may be provided on the second gear 155. Alternatively, the second gear 155 and the self-locking member 154 or the operation knob 151 may also be fixedly connected by structures such as screws.

[0057] In this solution, the module of the first gear 152 is greater than the module of the second gear 155. Since the module of the second gear 155 is small, the rotation angle of the second gear 155 is small, so the rotation angle of the operation knob 151 is reduced.

[0058] In the above embodiment, when the number of the adjustment rods 110 is at least two, the knob adjustment unit 150 may further include a third gear 156. The first gear 152 is engaged with the rack section 111 of the first adjustment rod 1101, the third gear 156 is engaged with the first gear 152, and the third gear 156 is engaged with the rack section 111 of the second adjustment rod 1102.

[0059] Optionally, the module of the third gear 156 and the module of the first gear 152 may be the same, so as to facilitate the synchronous movement of the first adjustment rod 1101 and the second adjustment rod 1102.

[0060] Furthermore, the first gear 152, the second gear 155, and the third gear 156 may all be straight-tooth gears. Of course, the first gear 152, the second gear 155, and the third gear 156 may also have other structures, which are not limited herein.

[0061] In an alternative solution, one of the mounting base 153 and the first gear 152 may be provided with a first limit chute 1532, and the other is provided with a first limit protrusion 1521. In the rotation direction of the first gear 152, the first limit protrusion 1521 is slidably engaged with the first limit chute 1532. In this solution, the two ends of the first limit chute 1532 are the limit positions where the first limit protrusion 1521 can move, such as Figure 5 the angle shown as D3 in the figure. Therefore, the cooperation between the first limit chute 1532 and the first limit protrusion 1521 can limit the rotation angle of the first gear 152, and further limit the movement position of the adjustment rod 110, thereby avoiding the risk of excessive adjustment of the adjustment rod 110.

[0062] In the case where there are multiple adjustment rods 110, the first limiting slot 1532 and the first limiting protrusion 1521 are used to limit the first gear 152, thereby avoiding over-adjustment of the first adjustment rod 1101. Similarly, one of the mounting base 153 and the third gear 156 can be provided with a second limiting slot 1533, and the other can be provided with a second limiting protrusion 1561. In the rotation direction of the third gear 156, the second limiting protrusion 1561 is slidably matched with the second limiting slot 1533. In this solution, the two ends of the second limiting slot 1533 are the limit positions where the second limiting protrusion 1561 can move, so the second limiting slot 1533 and the second limiting protrusion 1561 can cooperate to limit the rotation angle of the third gear 156, and then limit the moving position of the second adjustment rod 1102, thereby avoiding the risk of over-adjustment of the second adjustment rod 1102.

[0063] In an optional solution, the adjustment rod 110 may further include a polished rod segment 112, and the polished rod segment 112 may be connected to the rack segment 111. In this solution, the toothed structure is processed in the area where the adjustment rod 110 matches with the first gear 152, and the toothed structure does not need to be processed in the unmatched area, thereby simplifying the manufacturing cost of the adjustment rod 110.

[0064] Furthermore, the polished rod segment 112 usually fits the user's skin, so if the polished rod segment 112 is strong, it is easy to press the user's skin, thereby causing discomfort to the user. Based on this, in another optional embodiment, the strength of the polished rod segment 112 can be less than the strength of the rack segment 111. In this solution, the strength of the rack segment 111 is relatively high, so it is beneficial to improve the matching reliability between the adjustment rod 110 and the first gear 152. The strength of the polished rod segment 112 is relatively low, so the polished rod segment 112 is easy to deform, so it can be closer to the user's skin, thereby reducing the user's discomfort.

[0065] Optionally, the polished rod segment 112 and the rack segment 111 can be manufactured by two-color injection molding. The rack segment 111 can be made of metal material, and the polished rod segment 112 can be made of materials such as rubber.

[0066] In one solution, the mounting base 153 may include a mounting plate 153a and an annular protrusion 153b, and the annular protrusion 153b may be fixedly connected to the mounting plate 153a. The annular protrusion 153b and a partial area of ​​the mounting plate 153a may enclose a receiving groove 1531, and the second limiting portion 154a may be arranged on the inner annular surface of the annular protrusion 153b. The mounting plate 153a may be fixedly connected to the first housing 131 or the second housing 132. At this time, the mounting plate 153a may be connected to the first housing 131 or the second housing 132 by bolts, rivets, buckles and other components.

[0067] This solution can reduce the overall thickness of the mounting base 153, which is beneficial to reducing the weight of the tightening and loosening adjustment mechanism 100.

[0068] In another alternative solution, the second driving unit 140 can be a paddle adjustment unit 160. The paddle adjustment unit 160 can include a slide rail 163 and a toggle switch 161. The slide rail 163 can be arranged on the second housing 132, and the toggle switch 161 can be slidably engaged with the slide rail 163 along the extension direction of the slide rail 163. The toggle switch 161 can be connected to the adjustment rod 110. By toggling the toggle switch 161 to make the toggle switch 161 slide along the extension direction of the slide rail 163, the adjustment rod 110 can be driven to move relative to the second housing 132. As Figure 1 shown, when the toggle switch 161 is toggled to the left, the toggle switch 161 drives the adjustment rod 110 to move towards one side of the second housing 132, so that the distance between the second housing 132 and the first housing 131 is shortened. When the toggle switch 161 is toggled to the right, the toggle switch 161 drives the adjustment rod 110 to move towards one side of the first housing 131, so that the distance between the second housing 132 and the first housing 131 is increased.

[0069] In this solution, manual adjustment can be achieved through the toggle switch 161 and the slide rail 163, so that the tightening and loosening adjustment mechanism 100 does not need to be provided with a circuit structure, and thus the structure of the tightening and loosening adjustment mechanism 100 is relatively simple. At the same time, the second driving unit 140 does not require electricity, which is also beneficial to reducing the energy consumption of the wearable device.

[0070] Similarly, the first driving unit 120 can also be a paddle adjustment unit 160. At this time, the slide rail 163 can be arranged on the first housing 131. By toggling the toggle switch 161 to make the toggle switch 161 slide along the extension direction of the slide rail 163, the adjustment rod 110 can be driven to move relative to the first housing 131. At this time, the first driving unit 120 is also a manual operation structure, which is beneficial to further simplifying the structure of the tightening and loosening adjustment mechanism 100 and can further reduce the energy consumption of the wearable device.

[0071] In another alternative solution, the slide rail 163 can be a strip-shaped hole penetrating the first housing 131 or the second housing 132. The paddle adjustment unit 160 can further include a limiting structure 163.

[0072] The toggle switch 161 may include a switch body 1611 and a mating portion 1612. One end of the switch body 1611 may be exposed to the first housing 131 or the second housing 132. At this time, the user can contact the exposed end of the switch body 1611, so the user can drive the switch body 1611 to slide relative to the slide rail 163 through the exposed end of the switch body 1611. The other end of the switch body 1611 may pass through the strip-shaped hole and be connected to the mating portion 1612, so that the toggle switch 161 can slide along the strip-shaped hole. The adjusting rod 110 is connected to the mating portion 1612.

[0073] When the limiting structure 163 is engaged with the mating portion 1612, the limiting structure 163 restricts the toggle switch 161 from moving in the extending direction of the slide rail 163; when the limiting structure 163 is separated from the mating portion 1612, the mating portion 1612 is disengaged from the limiting structure 163.

[0074] In the specific operation process, when the toggle switch 161 needs to slide, the mating portion 1612 is disengaged from the limiting structure 163, so that the toggle switch 161 can slide along the extending direction of the slide rail 163. When the toggle switch 161 slides to the designated position, the limiting structure 163 is engaged with the mating portion 1612, and the limiting structure 163 restricts the toggle switch 161 from moving in the extending direction of the slide rail 163. Therefore, the toggle switch 161 is held at the designated position, thus avoiding accidental movement of the toggle switch 161.

[0075] In this solution, the locking of the adjusting rod 110 can be achieved through the limiting structure 163, thus avoiding the risk of accidental elongation of the tightening and loosening adjusting mechanism 100.

[0076] In the above embodiment, the limiting structure 163 may be a set screw. The set screw is provided on the mating portion 1612. When the toggle switch 161 needs to move, the set screw is screwed to separate the set screw from the first housing 131 or the second housing 132. When the toggle switch 161 needs to be locked, the set screw is screwed in the opposite direction so that the set screw abuts against the first housing 131 or the second housing 132, so that the mating portion 1612 is connected to the first housing 131 or the second housing 132, thus restricting the movement of the toggle switch 161.

[0077] In another alternative embodiment, the limiting structure 163 may be a plurality of limiting grooves 1631 formed in the first housing 131 or the second housing 132. The plurality of limiting grooves 1631 may be arranged at intervals along the extending direction of the strip-shaped hole.

[0078] The switch body 1611 can be switched between a first position and a second position along the axial direction of the elongated hole. When the switch body 1611 is in the first position, the engaging portion 1612 can be located outside the limiting groove 1631 to release the limitation of the engaging portion 1612 and the limiting structure 163, and the switch body 1611 can drive the engaging portion 1612 to move along the extending direction of the slide rail 163. When the switch body 1611 is in the second position, the engaging portion 1612 can be located in one of the limiting grooves 1631, and the limiting groove 1631 can cooperate with the engaging portion 1612 to limit the movement of the toggle switch 161 along the extending direction of the slide rail 163.

[0079] In a specific operation process, when the user adjusts the position between the adjusting rod 110 and the first housing 131 or the second housing 132, the user presses the switch body 1611 in the direction from the bottom to the opening of the limiting groove 1631. The switch body 1611 drives the engaging portion 1612 to disengage from the limiting groove 1631, and then the user pushes the switch body 1611 along the extending direction of the elongated hole to drive the adjusting rod 110 to move. When the switch body 1611 moves to a specified position, the switch body 1611 is driven to move in the direction from the opening to the bottom of the limiting groove 1631, so that the engaging portion 1612 is stuck in the corresponding limiting groove 1631 to limit the movement of the toggle switch and further limit the movement of the adjusting rod 110.

[0080] As Figure 7 shown, when the switch body 1611 is in the second position, there is a first gap between the switch body 1611 and the outer surface of the first housing 131 or the second housing 132, as shown by D1 in Figure 7 . Here, the first gap is the moving space of the switch body 1611 relative to the first housing 131 or the second housing 132, and can also be understood as the moving distance of the engaging portion 1612 along the axial direction of the elongated hole. When the switch body 1611 abuts against the outer surface of the first housing 131 or the second housing 132, that is, when the switch body 1611 is in the first position, the engaging portion 1612 disengages from the limiting groove 1631.

[0081] In this solution, by driving the engaging portion 1612 to enter and exit the limiting groove 1631, the limitation and release of the limitation of the toggle switch 161 can be realized, thus simplifying the operation mode of the toggle adjustment unit.

[0082] Optionally, the number of the limiting grooves 1631 can be three. Of course, the number of the limiting grooves 1631 can also be other numbers, which are not limited in this article.

[0083] Further, the paddle adjusting unit 160 may further include an elastic component 164. The elastic component 164 may include an elastic member 1641 and a slider 1642. The slider 1642 moves as the toggle switch 161 slides. One side of the slider 1642 abuts against the elastic member 1641, and the other side of the slider 1642 abuts against the engaging portion 1612.

[0084] During the specific operation process, when the engaging portion 1612 is in the second position, the elastic member 1641 presses the engaging portion 1612 through the slider 1642, so that the engaging portion 1612 is located in one of the limiting grooves 1631 to limit the movement of the engaging portion 1612, and further limit the sliding of the toggle switch 161 along the extending direction of the slide rail 163. During the process of driving the toggle switch 161 to move the engaging portion 1612 from the second position to the first position, the engaging portion 1612 presses the elastic member 1641 through the slider 1642 to cause the elastic member 1641 to be deformed under pressure, and the engaging portion 1612 disengages from the notch of the limiting groove 1631, so that the engaging portion 1612 is disengaged from the limiting of the limiting groove 1631.

[0085] In this solution, the automatic locking of the toggle switch 161 can be realized through the elastic component 164, thus simplifying the operation steps of the paddle adjusting unit 160 and reducing the operation difficulty.

[0086] In the above solution, the elastic member 1641 may be a spring, and the elastic telescopic direction of the spring may be parallel to the axis direction of the strip-shaped hole.

[0087] In another alternative solution, when the engaging portion 1612 is in the first position, the limiting groove 1631 is provided between the engaging portion 1612 and the switch body 1611. The switch body 1611, the limiting structure 163 and the engaging portion 1612 are arranged along the first direction. Here, the first direction may be the thickness direction of the first housing 131, or may be understood as the axis direction of the strip-shaped hole. The elastic member 1641, the slider 1642 and the engaging portion 1612 may be arranged along the second direction, and the included angle between the first direction and the second direction is between 45° and 135°.

[0088] In this solution, the arrangement directions of the switch body 1611, the limiting structure 163 and the engaging portion 1612 intersect with the arrangement directions of the elastic member 1641, the slider 1642 and the engaging portion 1612. Therefore, the superposition of dimensions in the same direction is avoided, which is beneficial to greatly reducing the thickness of the entire tightening and loosening adjusting mechanism 100. In addition, the acting force of the slider 1642 on the switch body 1611 and the acting force of the elastic member 1641 on the slider 1642 are not in the same direction, so that the slider 1642 can provide better supporting force, and thus the toggle switch 161 has a better self-locking effect.

[0089] Optionally, the elastic member 1641, the slider 1642 and the matching portion 1612 can be arranged along the width direction of the strip hole. In this case, the second direction is the width direction of the strip hole, and the first direction is the axial direction of the strip hole. It can also be understood that the first direction is perpendicular to the second direction. In this case, the elastic expansion and contraction direction of the elastic member 1641 is perpendicular to the extension direction of the strip hole and its axial direction.

[0090] Furthermore, one end of the slider 1642 close to the matching portion 1612 may be provided with a first guiding inclined surface 16421 , and one end of the matching portion 1612 close to the slider 1642 may be provided with a second guiding inclined surface 16121 abutting against and matching the first guiding inclined surface 16421 .

[0091] When the matching portion 1612 moves from the second position to the first position, the first guide slope 16421 can move relative to the second guide slope 16121, thereby pushing the slider 1642 to move and squeeze the elastic member 1641. In this solution, the first guide slope 16421 and the second guide slope 16121 can achieve smooth positioning of the slider 1642 and the matching portion 1612, thereby further improving the adjustment experience of the body toggle adjustment unit.

[0092] In another optional embodiment, the number of elastic components 164 can be at least two, including a first elastic component and a second elastic component, and the first elastic component and the second elastic component are respectively located on two opposite sides of the matching portion 1612. It can be understood here that the first elastic component, the matching portion 1612 and the second elastic component are arranged along the width direction of the strip hole. In this solution, the matching portion 1612 has elastic components 164 on both opposite sides, thereby avoiding the risk of applying force to one side of the matching portion 1612, causing the toggle switch 161 to get stuck or stuck.

[0093] In the above solution, the slider 1642 can be movably matched with the matching portion 1612 along the axial direction of the strip hole, one end of the elastic member 1641 can be fixed on the first shell 131 or the second shell 132, and the other end of the elastic member 1641 can abut against the slider 1642. In this solution, the structure of the elastic member 1641 also needs to be a strip structure, and the length of the elastic member 1641 needs to be the same as the length of the strip hole, so as to ensure that the slider 1642 can abut against the elastic member 1641 when it moves to any position.

[0094] In another alternative solution, the paddle adjustment unit 160 may further include a sliding member 1643. The sliding member 1643 may be located within the first housing 131 or the second housing 132 and is slidably engaged with the first housing 131 or the second housing 132 along the extending direction of the elongated hole. One end of the elastic member 1641 is connected to the sliding member 1643, and the other end is connected to the slider 1642. At this time, when the engaging portion 1612 drives the slider 1642 to move along the extending direction of the elongated hole, the slider 1642 synchronously drives the sliding member 1643 to move through the elastic member 1641. In this solution, through the design of the sliding member 1643, the elastic member 1641 can be fixedly connected to the slider 1642, and the slider 1642 can drive the elastic member 1641 to move. Therefore, it is beneficial to shorten the volume of the elastic member 1641, thereby optimizing the volume of the paddle adjustment unit 160.

[0095] In another alternative solution, the paddle adjustment unit 160 may further include a connecting rod 1645. One end of the connecting rod 1645 may be rotatably connected to the engaging portion 1612, and the other end of the connecting rod 1645 may be rotatably connected to the adjusting rod 110. In this solution, there is a certain rotational adjustment space between the toggle switch 161 and the adjusting rod 110, which is beneficial to avoiding the risk of the toggle switch 161 getting stuck.

[0096] Optionally, the connecting rod 1645 may be rotatably connected to the engaging portion 1612 and the adjusting rod 110 through a rotating shaft or a pin shaft.

[0097] In another alternative solution, the connecting rod 1645 may also be a telescopic rod. At this time, according to the positional relationship between the toggle switch 161 and the adjusting rod 110, the connecting rod 1645 can be appropriately telescoped, thereby further avoiding the risk of the toggle switch 161 getting stuck.

[0098] In an alternative solution, as Figure 1 shown, the first driving unit 120 may adopt the above-mentioned knob adjustment unit 150. Since the knob adjustment unit 150 is stepless adjustment or has a small adjustment range, micro-adjustment or fine adjustment can be achieved. The second driving unit 140 may adopt the above-mentioned paddle adjustment. The toggle switch 161 in the paddle adjustment unit 160 has a large moving range. Therefore, the paddle adjustment unit 160 can achieve a large-range adjustment of the adjusting rod 110, thereby enabling a coarse adjustment of the adjusting rod 110. At this time, the first driving unit 120 can perform fine adjustment, while the second driving unit 140 can perform coarse adjustment, thereby further improving the adjustment accuracy of the tightness adjustment mechanism 100, and further enabling the user to have a better wearing experience.

[0099] Based on the tension adjustment mechanism 100 disclosed in the embodiment of the present application, the embodiment of the present application further discloses a wearable device, and the disclosed wearable device includes the tension adjustment mechanism 100 described in any of the above embodiments.

[0100] The wearable device also includes a device body, which is the main part of the wearable device and includes the main functional components of the wearable device, such as a device housing 130, a display screen, a main board, etc. The tension adjustment mechanism 100 is connected to the device housing 130, and the tension adjustment mechanism 100 is used to realize the wearing of the wearable device on the human body.

[0101] In another optional solution, the electronic device may further include a first strap 210 and a second strap 220, and the first housing 131 is connected to the first strap 210. The second housing 132 may be connected to the second strap 220. In the case where the wearable device is a watch, the first strap 210, the second strap 220 and the tension adjustment mechanism 100 constitute a watch strap assembly, and the device body may be a dial. For another example, the wearable device may be a VR (Virtual Reality) or AR (Augmented Reality) device, in which case the device body may be a display device, and the first strap 210, the second strap 220 and the tension adjustment mechanism 100 constitute a headband assembly. In the embodiment of the present application. There may be multiple types of the first strap 210 and the second strap 220, for example, the first strap 210 and the second strap 220 may be leather straps, metal straps, etc. The embodiment of the present application does not limit the specific types of the first strap 210 and the second strap 220.

[0102] In another optional embodiment, the electronic device may further include an elastic band 230, and the first strap 210 and the second strap 220 may be connected by the elastic band 230. The first drive unit 120 drives the adjustment rod 110 to move relative to the first shell 131 to change the length of the adjustment rod 110 between the first shell 131 and the second shell 132, so that the elastic band 230 is deformed. In this solution, the adjustment rod 110 is inserted into the elastic band 230, thereby avoiding the adjustment rod 110 from being exposed, thereby improving the appearance performance of the wearable device. At the same time, the risk of damage to the adjustment rod 110 can also be avoided.

[0103] The wearable device disclosed in the embodiments of the present application may be a smart watch, VR glasses, AR glasses and other devices. The embodiments of the present application do not limit the specific types of wearable devices.

[0104] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A tension adjusting mechanism, characterized in that, It includes an adjusting rod (110), a first driving unit (120) and a housing (130); The housing (130) includes a first housing (131) and a second housing (132) which are separately arranged; One end of the adjusting rod (110) is movably arranged in the first housing (130), and the other end of the adjusting rod (110) is connected to the second housing (130); The first driving unit (120) is arranged on the first housing (130), and the first driving unit (120) is used to drive the adjusting rod (110) to move relative to the first housing (130) so as to change the distance between the first housing (130) and the second housing (130).

2. The tension adjustment mechanism according to claim 1, characterized in that: The tightness adjusting mechanism further includes a second driving unit (140), the second driving unit (140) is arranged on the second housing (130), and the second driving unit (140) is used to drive the adjusting rod (110) to move relative to the second housing (130) so as to change the distance between the second housing (130) and the first housing (130).

3. The tension adjustment mechanism according to claim 2, characterized in that: The adjusting precision of the first driving unit (120) is greater than that of the second driving unit (140).

4. The tension adjustment mechanism according to claim 2, characterized in that: The second driving unit (140) is a knob adjusting unit (150); The knob adjusting unit (150) includes an operation knob (151) and a first gear (152), the adjusting rod (110) has a rack section (111) meshing with the first gear (152), and the first gear (152) rotates with the rotation of the operation knob (151) to drive the adjusting rod (110) to move relative to the second housing (132).

5. The tension adjustment mechanism according to claim 1, characterized in that: The first driving unit (120) is a knob adjusting unit (150); The knob adjusting unit (150) includes an operation knob (151) and a first gear (152), the adjusting rod (110) has a rack section (111) meshing with the first gear (152), and the first gear (152) rotates with the rotation of the operation knob (151) to drive the adjusting rod (110) to move relative to the first housing (131).

6. The tension adjustment mechanism according to claim 4 or 5, characterized in that: The knob adjusting unit (150) further includes a mounting base (153) and a self-locking member (154), the mounting base (153) is provided with a receiving groove (1531), and a first limiting portion (1531a) is provided on the side wall of the receiving groove (1531); The self-locking member (154) is located in the receiving groove (1531) and can rotate relative to the mounting base (153); The self-locking member (154) is provided with a second limiting portion (154a), and the first limiting portion (1531a) cooperates with the second limiting portion (154a); The operation knob (151) is connected to the self-locking member (154). When the rotational force of the operation knob (151) overcomes the force between the first limiting portion (1531a) and the second limiting portion (154a), the self-locking member (154) rotates as the operation knob (151) rotates.

7. The tension adjustment mechanism according to claim 6, characterized in that: The operation knob (151) includes a knob body (1511) and a third limiting portion (1512) connected to each other. The third limiting portion (1512) is inserted between the side wall of the accommodation groove (1531) and the outer peripheral surface of the self-locking member (154), and the third limiting portion (1512) is in limiting cooperation with the second limiting portion (154a) along the rotation direction of the operation knob (151).

8. The tension adjustment mechanism according to claim 7, characterized in that: The self-locking member (154) includes a connecting ring (1541) and an arc-shaped member (1542). The arc-shaped member (1542) is sleeved on the outer periphery of the connecting ring (1541). The arc-shaped member (1542) has a first end (15421) and a second end (15422). The second limiting portion (154a) is provided at the first end (15421), and there is a buffer gap (1543) between the first end (15421) and the connecting ring (1541). The second limiting portion (154a) provided at the first end (15421) is in limiting cooperation with the first limiting portion (1531a) provided inside the mounting base (153) along the rotation direction of the operation knob (151), and the second limiting portion (154a) provided at the first end (15421) is in limiting cooperation with the third limiting portion (1512) along the rotation direction of the operation knob (151).

9. The tension adjustment mechanism according to claim 4 or 5, characterized in that: The knob adjusting unit (150) further includes a second gear (155) coaxially arranged with the operation knob (151). The second gear (155) meshes with the first gear (152). The second gear (155) rotates synchronously with the operation knob (151) to drive the first gear (152) to rotate, and further drive the adjusting rod (110) to move. The module of the first gear (152) is larger than the module of the second gear (155).

10. The tension adjustment mechanism according to claim 4 or 5, characterized in that: The knob adjusting unit (150) further includes a mounting base (153). The first gear (152) is arranged on the mounting base (153). One of the mounting base (153) and the first gear (152) is provided with a first limiting sliding groove (1532), and the other is provided with a first limiting protrusion (1521). In the rotation direction of the first gear (152), the first limiting protrusion (1521) is in sliding cooperation with the first limiting sliding groove (1532).

11. The tension adjustment mechanism according to claim 2, characterized in that: The second driving unit (140) is a paddle adjusting unit (160); the paddle adjusting unit (160) includes a slide rail (162) and a toggle switch (161). The slide rail (162) is arranged on the second housing (130), and the toggle switch (161) is slidably engaged with the slide rail (162) along the extension direction of the slide rail (162). The toggle switch (161) is connected to the adjusting rod (110); by toggling the toggle switch (161), the toggle switch (161) slides along the extension direction of the slide rail (162) to drive the adjusting rod (110) to move relative to the second housing (130).

12. The tension adjustment mechanism according to claim 1, characterized in that: The first driving unit (120) is a paddle adjusting unit (160); the paddle adjusting unit (160) includes a slide rail (162) and a toggle switch (161). The slide rail (162) is arranged on the first housing (131), and the toggle switch (161) is slidably engaged with the slide rail (162) along the extension direction of the slide rail (162). The toggle switch (161) is connected to the adjusting rod (110); by toggling the toggle switch (161), the toggle switch (161) slides along the extension direction of the slide rail (162) to drive the adjusting rod (110) to move relative to the first housing (130).

13. The tension adjustment mechanism according to claim 11 or 12, characterized in that: The slide rail (162) is a slot that penetrates the first housing (130) or the second housing (130); the paddle adjusting unit (160) further includes a limiting structure (163). The toggle switch (161) includes a switch body (1611) and a mating part (1612). One end of the switch body (1611) is exposed outside the first housing (130) or the second housing (130), and the other end of the switch body (1611) passes through the slot and is connected to the mating part (1612), so that the toggle switch (161) can slide along the slot; the adjusting rod (110) is connected to the mating part (1612). When the limiting structure (163) is engaged with the mating part (1612), the limiting structure (163) restricts the toggle switch (161) from moving along the extension direction of the slide rail (162); when the limiting structure (163) is separated from the mating part (1612), the mating part (1612) is released from the limit of the limiting structure (163).

14. The tension adjustment mechanism according to claim 13, characterized in that: The limiting structure (163) is a plurality of limiting grooves (1631) formed on the first housing (130) or the second housing (130), and the plurality of limiting grooves (1631) are arranged at intervals along the extension direction of the slot. The switch body (1611) can be switched between a first position and a second position along the axial direction of the strip-shaped hole. When the switch body (1611) is in the first position, the engaging portion (1612) is located outside the limiting groove (1631) to release the limitation of the engaging portion (1612) and the limiting structure (163), and the switch body (1611) can drive the engaging portion (1612) to move along the extending direction of the slide rail (162). When the switch body (1611) is in the second position, the engaging portion (1612) is located in one of the limiting grooves (1631), and the limiting groove (1631) cooperates with the engaging portion (1612) to limit the movement of the toggle switch (161) along the extending direction of the slide rail (162).

15. The tension adjustment mechanism according to claim 14, characterized in that: The toggle adjustment unit (160) further includes an elastic component (164). The elastic component (164) includes an elastic member (1641) and a slider (1642). The slider (1642) moves as the toggle switch (161) slides. One side of the slider (1642) abuts against the elastic member (1641), and the other side of the slider (1642) abuts against the engaging portion (1612). When the engaging portion (1612) is in the second position, the elastic member (1641) presses the engaging portion (1612) through the slider (1642) so that the engaging portion (1612) is located in one of the limiting grooves (1631) to limit the movement of the engaging portion (1612), and further limit the sliding of the toggle switch (161) along the extending direction of the slide rail (162). During the process of driving the toggle switch (161) to move the engaging portion (1612) from the second position to the first position, the engaging portion (1612) presses the elastic member (1641) through the slider (1642) to cause the elastic member (1641) to be deformed under pressure, and the engaging portion (1612) disengages from the notch of the limiting groove (1631), so that the engagement between the engaging portion (1612) and the limiting groove (1631) is released.

16. The tension adjustment mechanism according to claim 15, characterized in that: When the engaging portion (1612) is in the first position, the limiting groove (1631) is provided between the engaging portion (1612) and the switch body (1611). The switch body (1611), the limiting structure (163), and the engaging portion (1612) are arranged along a first direction, and the elastic member (1641), the slider (1642), and the engaging portion (1612) are arranged along a second direction. The included angle between the first direction and the second direction is between 45° and 135°.

17. The tension adjustment mechanism according to claim 15, characterized in that: One end of the slider (1642) close to the mating part (1612) is provided with a first guiding inclined surface (16421), and one end of the mating part (1612) close to the slider (1642) is provided with a second guiding inclined surface (16121) which abuts against and matches the first guiding inclined surface (16421). During the process of the mating part (1612) moving from the second position to the first position, the first guiding inclined surface (16421) moves relative to the second guiding inclined surface (16121), so as to push the slider (1642) to move and extrude the elastic member (1641).

18. The tension adjustment mechanism according to claim 11 or 12, characterized in that: The dial adjusting unit (160) further includes a connecting rod (1644). One end of the connecting rod (1644) is rotatably connected to the toggle switch (161), and the other end of the connecting rod (1644) is rotatably connected to the adjusting rod (110).

19. A wearable device, characterized in that, Comprising the tightness adjusting mechanism according to any one of claims 1 to 18.

20. The wearable device according to claim 19, wherein, Further comprising a first strap (210), a second strap (220) and an elastic strap (230), wherein the first strap (210) and the second strap (220) are connected by the elastic strap (230). The first housing (130) is connected to the first strap (210); the second housing (130) is connected to the second strap (220), and a part of the adjusting rod (110) is disposed inside the elastic strap (230). The first driving unit (120) drives the adjusting rod (110) to move relative to the first housing (130) so as to change the length of the adjusting rod (110) between the first housing (130) and the second housing (130), so that the elastic strap (230) deforms.

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