Passive assist arm and wearable device

Abstract

This invention relates to the field of exoskeletons and specifically discloses a passive assist arm and a wearable device, which includes a main support, a rotating swing arm, and an elastic member. The main support, as the main structure, is connected to the waist and shoulder of the human body, respectively, and supports the entire assist arm structure. The rotating swing arm is movably connected to the main support and swings synchronously with the wearer's arm. The elastic member is provided within the main support and connected to the rotating swing arm. The elastic member contracts and pulls the rotating swing arm, causing it to rotate away from the waist of the human body, thereby providing an assist force. A tension member is also connected to the elastic member, and a lock base is provided on the main support for locking the tension member. By pulling and locking the tension member, the magnitude of the elastic force of the elastic member can be adjusted and held, thereby enabling adjustment of the assist force. This invention has the advantages of adjustable assist force, a simple and stable structure, and low implementation costs.

Description

Technical Field

[0001] This application relates to the field of exoskeletons, and in particular to passive assist arms and wearable devices.

Background Art

[0002] Currently, passive assist devices are gradually being used in some working scenarios in fields such as logistics warehouses, industrial manufacturing, and military industries to reduce the labor load of workers, relieve muscle fatigue and damage of workers, improve work efficiency, and reduce the occurrence of safety accidents.

[0003] However, currently, the generally used passive assist devices cannot provide an assist force with an appropriate force value according to the work content. If the provided force value is small, it cannot meet the demand for the assist force in actual work. If the provided force value is large, several destruction accidents are likely to occur, causing damage to components such as some workpieces and products.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to easily adjust the magnitude of the assist force of the passive assist device, this application provides a passive assist arm and a wearable device that can adjust the magnitude of the assist force according to the demand to adapt to different working situations, and has a simple and stable structure and low implementation cost.

Means for Solving the Problems

[0005] In a first aspect, the passive assist arm provided in this application adopts the following technical solutions.

[0006] The passive assist arm includes a body support part, a connecting member rotatably attached to the body support part and having at least one fixed end and one elastic acting end, A rotating swing arm fixed to a fixed end, An elastic member, wherein the movable end of the elastic member is connected to an elastic action end, and is used to pull and rotate a rotating swing arm, and the adjustment end of the elastic member is movably provided on the main body support portion, It includes an adjustment locking mechanism provided on the main body support portion, which is used to adjust and lock the position of the adjustment end of the elastic member on the main body support portion, thereby adjusting the magnitude of the assist force.

[0007] In the above technical solution, the elastic member pulls the connecting member to drive the rotation of the rotating swing arm, and further provides assist force when the human arm lifts heavy objects, reducing the workload. The adjustment lock mechanism adjusts the position of the adjustment end of the elastic member on the main support part, changes the degree of tension of the elastic member, adjusts the magnitude of the elastic force, and further adjusts the magnitude of the assist force of the assist arm. As a result, the user can flexibly adjust the appropriate assist force according to different work conditions and scenes, improving the applicability of the assist device, meeting the demand for assist force, and avoiding the occurrence of component damage.

[0008] Selectively, the adjustment locking mechanism includes a tension member and a locking base, the tension member being connected to the adjustment end of an elastic member, the tension member having a range of motion to pull and move the adjustment end of the elastic member so that the adjustment end of the elastic member is separated from the movable end of the elastic member, and the locking base is used to lock the position of the tension member.

[0009] By employing the above technical solution, the adjustment end of the elastic member can be pulled by the tension member to increase the elastic force of the elastic member, thereby increasing the assist force. Furthermore, by engaging the tension member with the lock base and locking it, the elastic member can be held at the adjusted elastic force. When it is necessary to meet the assist demand and reduce the assist force, the tension member can be loosened by the lock base, automatically resetting the elastic member. After adjusting to the required size, the tension member can be locked again. The adjustment structure is simple, stable, and easy to operate. The user can maintain the attached state of the assist arm. The amount of assist force of the assist arm can be directly adjusted by the tension member, eliminating the need to remove the assist arm, and greatly improving the convenience and efficiency of assist force adjustment.

[0010] The tensioning member is optionally a flexible rope.

[0011] The ease of installation of tensile members with flexible structures is reduced, thereby improving compatibility and lowering the difficulty of assembly.

[0012] Selectively, the lock base includes a base body and at least one movable part, the base body being attached to a main support, the movable part being movably mounted on the base body, and the movable part having at least one end face that engages with the base body to clamp a tension member.

[0013] By employing the above technical solution, the tension member is locked using the clamping engagement between the movable part and the base body, making it very convenient to switch between the unlocked and locked states, easy to operate, and having a simple and durable structure.

[0014] Multiple protrusions are formed on the end face, which can be selected as needed.

[0015] The protrusions increase the frictional force between the end face and the tension member, further improving the locking effect.

[0016] Selectively, a first slide cavity is formed in the main body support portion, the adjustment end of the elastic member is provided in the first slide cavity, and an opening is formed at the end of the main body support portion that approaches the connecting member, the opening is in communication with the first slide cavity, and the movable end of the elastic member extends from the opening and is connected to the elastic action end.

[0017] By employing the above technical solution, the main support section can form an isolation and protective effect over the internal elastic member, preventing wear of the elastic member, and the external structure is clean and aesthetically pleasing. Furthermore, the main support section restricts the expansion and contraction path of the elastic member, avoiding situations such as entanglement of the elastic member, and improving the stability of the elastic member during expansion and contraction.

[0018] Selectively, a first slide cavity is formed in the main body support portion, the adjustment end of the elastic member is provided in the first slide cavity, an opening is formed at the end of the main body support portion approaching the connecting member, the opening communicates with the first slide cavity, the movable end of the elastic member extends from the opening and is connected to the elastic end, a perforation is formed in the main body support portion, the perforation communicates with the first slide cavity, and a tension member extends from the first slide cavity.

[0019] By employing the above technical solution, the tension member can be extended from the drilling port and grasped by a person's hand, and by pulling the tension member, the position of the adjustment end of the elastic member can be changed, thereby adjusting the magnitude of the assist force, while also ensuring that the elastic member remains within the main support part without external interference, further improving the protective effect on the elastic member, and further improving the durability of the device. In addition, the flexible cord makes it easy to extend the tension member from the drilling port, and the difficulty of assembly is low.

[0020] Selectively, the main body support portion is provided with at least one stopper roller rotatably in the opening, and when the movable end of the elastic member is displaced from the main body support portion, the elastic member comes into contact with the outer circumferential surface of the stopper roller.

[0021] By adopting the above technical solution, the stopper roller stops the expansion and contraction and swinging of the elastic member, improves the stability of the elastic member, avoids the wear caused by the contact of the elastic member with the hollow rod body, and improves the durability performance.

[0022] In a second aspect, the wearable device provided in the present application adopts the following technical solution.

[0023] The wearable device includes a belt, a strap and the above passive assist arm. The strap is connected to the belt. The strap is used for wearing on the shoulder of the human body. The belt is used for surrounding and binding the waist of the human body. Further, it includes an extension rod and an adjustment base. The adjustment base is fixed to the main body support part. The extension rod is drilled in the adjustment base. One end of the extension rod is fixed to the belt, and the other end extends into the main body support part. A lock screw for locking the position of the extension rod is provided on the adjustment base. The end part of the main body support part that is separated from the extension rod is fixed to the strap.

[0024] By adopting the above technical solution, the distance between the rotating swing arm and the belt can be adjusted by adjusting the length of the extension rod extending, so as to match different body-shaped wearers, and the compatibility of the wearable device can be improved.

[0025] Optionally, a lock block is provided at the end of the lock screw close to the extension rod. The lock block is bonded to the extension rod. The lock screw drives the lock block to move in a direction approaching or separating from the extension rod.

[0026] The combination of the lock screw and the lock block can quickly realize the switching between the unlocked and locked states of the extension rod, is easy to use, and effectively improves the adjustment efficiency.

Effects of the Invention

[0027] In summary, the present application includes at least one of the following beneficial technical effects.

[0028] 1. The elastic member pulls the connecting member to drive the rotation of the rotating swing arm, and further provides an assisting force when the human arm lifts a heavy object, reduces the labor load, and adjusts the position of the adjusting end of the elastic member on the main body support portion of the adjusting lock mechanism, thereby changing the tension degree of the elastic member, and thus adjusting the magnitude of the elastic force, and further adjusting the magnitude of the assisting force of the assisting arm, so that the user can flexibly adjust an appropriate assisting force according to different working conditions and scenes, improving the applicability of the assisting device, meeting the demand for the assisting force, and avoiding the occurrence of member breakage.

[0029] 2. When the adjusting end of the elastic member is pulled by the tension member, the elastic member can be pulled to increase the elastic force of the elastic member, and further increase the assisting force. Also, when engaging with the lock base to lock the tension member, the elastic member can be held at the adjusted elastic force, meeting the demand for assistance. When it is necessary to reduce the assisting force, the tension member can be loosened by the lock base, and the elastic member can be automatically reset. After adjusting to the required magnitude, the tension member can be locked again. The adjusting structure is simple and stable, and easy to operate.

[0030] 3. The main body support portion forms isolation protection for the internal elastic member, avoiding wear of the elastic member, and the external structure is clean and aesthetic. Also, the main body support portion limits the expansion and contraction path of the elastic member, avoiding situations such as entanglement of the elastic member, and improving the stability of the elastic member during expansion and contraction.

Brief Description of the Drawings

[0031] [Figure 1] It is a schematic diagram of the overall structure for showing the passive assisting arm of the embodiment of the present application alone. [Figure 2] It is a half-sectional view of FIG. 1. [Figure 3] It is a schematic diagram for showing the opening of the embodiment of the present application. [Figure 4] This is a schematic diagram of the overall structure of the embodiment of the present invention. [Figure 5] This is a schematic diagram illustrating the adjustment base for the embodiment of the present application. [Modes for carrying out the invention]

[0032] The present application will be explained in more detail below, in conjunction with Figures 1-3.

[0033] Embodiments of the present application disclose a passive assist arm, which, with reference to Figures 1 and 2, includes a main support 1, a rotating swing arm 2, an elastic member 3, and a connecting member 4. The main support 1, as a main structure, can be connected to the wearer's waist and / or shoulder to support the entire assist arm structure, and the main support 1 also has at least one end or one projection located on the wearer's shoulder to serve as a hinge connection point for attaching the connecting member 4. The connecting member 4 can rotate relative to the main support 1 around the hinge connection point, and the connecting member 4 is connected to the rotating swing arm 2 and the elastic member 3, respectively, the rotating swing arm 2 being bound to the user's arm, and the elastic member 3 being provided on the main support 1 and acting on the connecting member 4.

[0034] When a user attaches the passive assist arm and lifts a heavy object, the user's arm swings downward to grip the heavy object. During this swing, the rotating swing arm 2 follows, pulling the connecting member 4 and causing it to rotate around the hinge connection point. At this time, the elastic member 3 is stretched. The user then moves the heavy object upward, causing the rotating swing arm 2 to rise upward. At this time, the elastic member 3 begins to contract due to its own elasticity, and this contraction force acts on the connecting member 4, giving the connecting member 4 rotational force. This rotational force can drive the rotating swing arm 2 upward, thereby assisting the user in lifting the heavy object.

[0035] Specifically, referring to Figures 1 and 2, the connecting member 4 has at least one fixed end 41 and one elastic end 42. The fixed end 41 and the elastic end 42 are formed by the connecting member 4 itself extending in two directions with the hinge connection point as the origin, and the angle between the fixed end 41 and the elastic end 42 in the extension direction is obtuse. Here, the fixed end 41 is fixed to the rotating swing arm 2, and the elastic end 42 is connected to the elastic member 3. When in use, the contraction force of the elastic member 3 acts on the elastic end 42, pulling and rotating the entire connecting member 4, providing torque to the fixed end 41, driving the rotating swing arm 2 upward, and providing an assistive force to the wearer.

[0036] In this embodiment, the entire connecting member 4 is a single-piece molded structure, which strengthens the overall structure. Furthermore, a hollow structure is provided on the surface of the connecting member 4, achieving the objectives of weight reduction and material saving.

[0037] Preferably, the connecting member 4 is provided with an insertion portion at its fixed end 41, and an insertion groove is provided correspondingly at the end of the rotating swing arm 2. The insertion portion is inserted into the insertion groove, thereby assembling the connecting member 4 and the rotating swing arm 2 as a single unit, and the two are further fixed together with bolts.

[0038] Furthermore, referring to Figures 1 and 2, the elastic member 3 has at least one movable end 31 connected to the elastic end 42 of the connecting member 4 and one adjustable end 32 movably provided on the main support part 1. An adjustment lock mechanism 5 is provided on the main support part 1 and is used to adjust and lock the position of the adjustable end 32 of the elastic member 3 on the main support part 1. By moving the adjustable end 32 of the elastic member 3 closer to or further away from the hinge connection point of the connecting member 4 using the adjustment lock mechanism 5, the degree of tension of the elastic member 3 during the rotation process of the connecting member 4 can be changed, and the magnitude of the elastic force of the elastic member 3 can be adjusted, thereby changing the magnitude of the assist force of the assist arm.

[0039] In this embodiment, the elastic member 3 is preferably an elastic belt. Elastic belts have characteristics such as being lightweight and durable, and they do not generate noise or vibration during expansion and contraction. Furthermore, elastic belts have good flexibility, are easy to install, and can maintain their elasticity even when a certain amount of bending occurs.

[0040] Referring to Figures 2 and 3, the main support section 1 includes a hollow rod body 11 and two extension plates 12. One end of the hollow rod body 11 is located at the shoulder of a person, and the other end is located at the waist of a person. The end of the hollow rod body 11 located at the shoulder of a person extends in a direction away from the other end to form four mounting plates 19. The four mounting plates 19 have two opposing plate surfaces, and two of them are flush with each other. The two flush mounting plates 19 form mounting surfaces for attaching the extension plates 12, and the two extension plates 12 are each attached to the two mounting surfaces.

[0041] Furthermore, the two extension plates 12 extend in a direction approaching the shoulder joint of the human body, and the connecting member 4 is hinged between the ends of the two extension plates 12 that are spaced apart from the hollow rod body 11, bringing the hinge connection point of the connecting member 4 closer to the shoulder joint of the human body and improving the compatibility when the rotating swing arm 2 rotates in sync with the arm of the human body. In addition, the elastic member 3 is provided on the hollow rod body 11, and the hinge connection point of the connecting member 4 is spaced apart from the elastic member 3 by the extension plates 12, thereby increasing the biasing torque of the elastic member 3 and improving the assist effect.

[0042] Furthermore, referring to Figures 2 and 3, a first slide cavity 13 is formed within the hollow rod body 11, and an opening 14 is formed at the end of the hollow rod body 11 that approaches the mounting plate 19, with the opening 14 communicating with the first slide cavity 13. The adjustment end 32 of the elastic member 3 is slidably provided within the first slide cavity 13 and connected to the adjustment lock mechanism 5, while the movable end 31 of the elastic member 3 extends from the opening 14 and is connected to the elastic action end 42 of the connecting member 4. The hollow rod body 11 can form isolation protection for the elastic member 3, preventing wear during use due to exposure of the elastic member 3 or affecting its use by snagging on other structures, while also keeping the external structure clean and aesthetically pleasing. In addition, the inner wall of the first slide cavity 13 can restrict the expansion and contraction path of the elastic member 3, preventing situations such as entanglement of the elastic member 3 and improving stability when the elastic member 3 repeatedly expands and contracts.

[0043] Furthermore, referring to Figures 1 and 3, a relief opening 43 is provided within the connecting member 4, and the relief opening 43 extends from the hinge connection point of the connecting member 4 to the elastic end 42. The connecting member 4 is also provided with a mounting roller 6 at the elastic end 42. The belt body of the elastic member 3 has two ends, A and B. End A is provided within the first slide cavity 13, and end B extends from the opening 14, passes through the relief opening 43, bypasses the mounting roller 6, returns and extends into the first slide cavity 13, and is connected to the adjustment lock mechanism 5 together with end A.

[0044] The belt body of the elastic member 3 is formed in a U shape, and both ends A and B of the belt body of the elastic member 3 are provided on the main body support part 1 to form the adjustment end 32 of the elastic member 3, and the belt body wound around the mounting roller 6 forms the movable end 31 of the elastic member 3. The belt body of the elastic member 3 is wound around the mounting roller 6, and there is no need to add a connection or fixing structure between the elastic member 3 and the connecting member 4, effectively reducing the difficulty of installation between the elastic member 3 and the connecting member 4, resulting in a simple and stable structure.

[0045] During use, the wearer raises or lowers the arm to drive the movement of the rotating swing arm 2, and further drives the rotation of the connecting member 4. The elastic member 3 extends and contracts synchronously, swinging within the relief opening 43 in a direction approaching or moving away from the hinge connection point of the connecting member 4. This reduces friction between the elastic member 3 and the connecting member 4, and further reduces wear that occurs during use of the elastic member 3. In addition, since both ends of the belt body of the elastic member 3 are hidden within the hollow rod body 11, the portion of the elastic member 3 that extends and is exposed from the opening 14 has a complete structure, is aesthetically pleasing and clean, and has a more secure structure.

[0046] Furthermore, referring to Figure 3, the four mounting plates 19 are distributed around the opening 14, where a stopper roller 8 is rotatably mounted between two mounting plates 19 with opposing plate surfaces, and the axis of the stopper roller 8 is parallel to the axis of the hinge connection shaft of the connecting member 4, the two stopper rollers 8 are close to each other on both sides of the opening 14, and the movable end 31 of the elastic member 3 passes between the two stopper rollers 8. When the connecting member 4 rotates and the movable end 31 of the elastic member 3 deviates from the axis of the hollow rod body 11, the elastic member 3 comes into contact with the outer circumferential surface of the corresponding stopper roller 8, thereby reducing wear that occurs when the elastic member 3 swings and improving the durability of the elastic member 3.

[0047] Preferably, the stopper roller 8 is provided in an I-shape, that is, a groove is formed on the outer surface of the stopper roller 8 along the circumferential direction, and when the elastic member 3 swings, it extends into the groove, thereby further stopping the elastic member 3 and improving the expansion and contraction and stability of the elastic member 3 during swinging.

[0048] Furthermore, referring to Figures 1 and 2, the adjustment lock mechanism 5 includes a tension member 51 and a lock base 52. The tension member 51 is connected to the adjustment end 32 of the elastic member 3 and has a range of motion that pulls and moves the adjustment end 32 of the elastic member 3. The lock base 52 is provided on the main body support 1 and is used to lock the position of the tension member 51.

[0049] The tension member 51 pulls the adjustment end 32 of the elastic member 3 to change the degree of tension of the elastic member 3, and the tension member 51 is locked in place with the lock base 52 to maintain the position of the adjustment end 32 of the elastic member 3, thereby adjusting and maintaining the degree of tension of the elastic member 3, adjusting the magnitude of the tensile force that the elastic member 3 acts on the connecting member 4, and further adjusting the magnitude of the assist force of the assist arm.

[0050] Furthermore, referring to Figure 2, the lock base 52 includes a base body 521 and at least one movable part 522, the base body 521 being fixedly attached to the main body support 1, the movable part 522 being rotatably attached to the base body 521, and the movable part 522 having an end face 523 that engages with the base body 521 to clamp the tension member 51. The tension member 51 is inserted between the movable part 522 and the base body 521, and locking of the tension member 51 is achieved by rotating the movable part 522 so that its end face 523 presses the tension member 51 against the base body 521.

[0051] Furthermore, the hollow rod body 11 has a perforation 15 formed in the base body 521 that communicates with the first slide cavity 13, and the end of the tension member 51 that is separated from the elastic member 3 passes through the perforation 15 and extends outward from the lock base 52, so that a person can pull it to adjust the position of the adjustment end 32 of the elastic member 3.

[0052] When it is necessary to increase the assist force, the movable part 522 is rotated to separate its end face 523 from the base body 521, releasing the tension member 51. The tension member 51 is then manually pulled to drive the movement of the adjustment end 32 of the elastic member 3, separating the adjustment end 32 of the elastic member 3 from the movable end 31 of the elastic member 3. After adjusting the adjustment end 32 of the elastic member 3 to the appropriate position, the movable part 522 is rotated so that its end face 523 clamps the base body 521 and the tension member 51, and the position of the adjustment end 32 of the elastic member 3 is maintained, thereby pulling the elastic member 3 and achieving the objective of increasing the assist force of the elastic member 3.

[0053] If it is necessary to reduce the assist force, the assist force can be quickly released by rotating the movable part 522 to separate its end face 523 from the base body 521 and releasing the tension member 51. At this time, the elastic member 3 resets itself due to the action of its own elastic force, pulling and moving the tension member 51. Once the adjustment end 32 of the elastic member 3 is reset to the required position, the movable part 522 can be rotated again to lock the tension member 51.

[0054] Preferably, multiple protrusions are formed on the end face 523 of the movable part 522. The protrusions can increase the frictional force between the end face 523 and the tension member 51, thereby improving the locking effect.

[0055] In this embodiment, the tension member 51 is preferably a flexible rope. A flexible rope is easy to implement, reduces the difficulty of installing the tension member 51, and facilitates the assembly of the overall structure.

[0056] Furthermore, in order to facilitate the connection between the elastic member 3 and the tension member 51, a connecting block 7 is provided at the connection point between the elastic member 3 and the tension member 51, and the ends A and B of the belt body of the elastic member 3 and the tension member 51 are all fixed to the connecting block 7.

[0057] Furthermore, referring to Figure 2, the hollow rod body 11 includes a first rod body 111 and a second rod body 112, and the base body 521 is fitted onto the adjacent ends of the first rod body 111 and the second rod body 112, connecting them coaxially. The first slide cavity 13 is opened in the first rod body 111, and the opening 15 is formed by the gap between the first rod body 111 and the second rod body 112. The separable design makes it easy to assemble the elastic member 3 and the tension member 51, by first pulling the tension member 51 out of the first rod body 111 and passing it through the base body 521, and then connecting the first rod body 111 and the second rod body 112, thereby reducing the difficulty of assembly and improving assembly efficiency. In other embodiments, the first rod body 111 and the second rod body 112 may be integrally molded, and a perforation opening 15 may be made in the rod body, and the tension member 51 can be pulled out from the perforation opening 15 during assembly.

[0058] Furthermore, referring to Figure 2, a stopper block 16 is provided on the outer wall of the second rod body 112, and an L-shaped stopper hole 17 is provided in the stopper block 16 for drilling the tension member 51, and both the inner wall and opening of the stopper hole 17 are provided as arcuate surfaces. The side wall of the stopper hole 17 restricts the movement path of the tension member 51, ensuring that the movement path of the portion of the tension member 51 on the base body 521 remains stable, and improving the engagement accuracy between the tension member 51 and the base body 521.

[0059] Preferably, the stopper block 16 is positioned close to the waist of the human body, thereby facilitating the gripping and pulling of the tensioning member 51 by hand. Furthermore, the wearer can directly adjust the magnitude of the assisting force using the tensioning member 51 without having to attach or detach the assist arm, simplifying the steps for adjusting the assisting force and further improving the convenience of adjusting the assisting force.

[0060] The principle of implementation of the passive assist arm disclosed in the embodiment of the present application is as follows: After unlocking the tension member 51 using the lock base 52, the tension member 51 is pulled, and the adjustment end 32 of the elastic member 3 is driven to move within the first slide cavity 13, thereby pulling the elastic member 3. Furthermore, locking the tension member 51 with the lock base 52 improves and maintains the elastic force of the elastic member 3. If it is necessary to further increase the assist force, or decrease the assist force, simply unlocking the lock base 52 will cause the tension member 51 to automatically reset with the elastic force of the elastic member 3. Once adjusted to the appropriate position, the tension member 51 can be locked again with the lock base 52. The engagement between the tension member 51 and the lock base 52 allows for adjustment of the magnitude of the assist force, and the adjustment process is simple and quick.

[0061] An embodiment of the present invention, with reference to Figure 4, further discloses a wearable device that includes at least one of the passive assist arms and further includes a belt 02 and a strap 01 connected to each other. Both ends of the main support 1 are connected to the belt 02 and the strap 01, respectively, and the assist arm is attached to the body by the strap 01 being worn on the shoulder of the human body and the belt 02 being wrapped around the waist of the human body. In this embodiment, the wearable device includes two of the passive assist arms, each to assist the arms on both sides.

[0062] Specifically, referring to Figures 4 and 5, an adjustment base 9 is provided at the end of the second rod body 112 that is spaced apart from the first rod body 111, and the second rod body 112 is inserted into the adjustment base 9 and fixed with bolts. The extension rod 18 slides through the adjustment base 9 and is provided coaxially with the second rod body 112, with one end of the extension rod 18 fixed to the belt 02 and the other end extending through the adjustment base 9 into the second rod body 112. By adjusting the length of the extension rod 18 located outside the second rod body 112, the distance between the rotating swing arm 2 and the belt 02 can be adjusted to match wearers of different body types, thereby improving the fit of the wearable device.

[0063] Furthermore, a lock screw 91 is screwed into the adjustment base 9, and the lock screw 91 is provided along the radial direction of the extension rod 18. A lock block 92 is provided at the end of the lock screw 91 that approaches the extension rod 18, and the side of the lock block 92 that is separated from the lock screw 91 is bonded to the surface of the extension rod 18. By rotating the lock screw 91 and moving the lock screw 91 along the radial direction of the extension rod 18, the distance between the lock block 92 and the extension rod 18 is adjusted, thereby locking or loosening the extension rod 18 and adjusting or fixing the position of the extension rod 18.

[0064] The implementation principle of the wearable device disclosed in the embodiments of this application is as follows: The lock screw 91 is rotated to separate it from the extension rod 18, thereby unlocking it. The extension length of the extension rod 18 is changed according to the wearer's body size to adjust the position of the rotating swing arm 2 relative to the shoulder. Furthermore, the hinge connection point of the connecting member 4 is kept close to the wearer's shoulder joint, improving the fit of the assist arm and further enhancing the assist effect.

[0065] All of the above are preferred embodiments of the present application and do not limit the scope of protection of the present application. Therefore, any equivalent modifications made in accordance with the structure, shape, and principle of the present application should all be included within the scope of protection of the present application. [Explanation of symbols]

[0066] 01...Strap, 02...Belt, 1...Main support part, 11...Hollow rod body, 111...First rod body, 112...Second rod body, 12...Extending plate, 13...First slide cavity, 14...Opening, 15...Drilling port, 16...Stopper block, 17...Stopper hole, 18...Extension rod, 19...Mounting plate, 2...Rotating swing arm, 3...Elastic member, 31...Movable end, 32...Adjustable end, 4...Connecting member, 41...Fixed end, 42...Elastic action end, 43...Relief port, 5...Adjustment lock mechanism, 51...Tension member, 52...Lock base, 521...Base body, 522...Movable part, 523...End face, 6...Mounting roller, 7...Connecting block, 8...Stopper roller, 9...Adjustment base, 91...Lock screw, 92...Lock block.

Claims

1. Main support part (1), A connecting member (4) is rotatably attached to the main body support (1) and has at least one fixed end (41) and one elastic end (42), A rotating swing arm (2) is fixed to the fixed end (41), An elastic member (3) wherein the movable end (31) of the elastic member (3) is connected to an elastic action end (42), and is used to pull and rotate the rotating swing arm (2), and the adjustment end (32) of the elastic member (3) is movably provided on the main body support part (1), A passive assist arm characterized by including an adjustment lock mechanism (5) provided on the main body support portion (1) and used to adjust and lock the position of the adjustment end (32) of the elastic member (3) on the main body support portion (1) in order to adjust the magnitude of the assist force.

2. The passive assist arm according to claim 1, wherein the adjustment lock mechanism (5) includes a tension member (51) and a lock base (52), the tension member (51) is connected to an adjustment end (32) of an elastic member (3), the tension member (51) has a range of motion that pulls and moves the adjustment end (32) of the elastic member (3), so that the adjustment end (32) of the elastic member (3) is separated from the movable end (31) of the elastic member (3), and the lock base (52) is used to lock the position of the tension member (51).

3. The passive assist arm according to claim 2, characterized in that the tensioning member (51) is a flexible rope.

4. The passive assist arm according to claim 2, wherein the lock base (52) includes a base body (521) and at least one movable part (522), the base body (521) is attached to the main body support (1), the movable part (522) is movably provided on the base body (521), and the movable part (522) has at least one end face (523) that engages with the base body (521) to clamp the tension member (51).

5. The passive assist arm according to claim 4, characterized in that a plurality of protrusions are formed on the end face (523).

6. The passive assist arm according to claim 1, characterized in that a first slide cavity (13) is formed in the main body support portion (1), the adjustment end (32) of the elastic member (3) is provided in the first slide cavity (13), an opening (14) is formed at the end of the main body support portion (1) that approaches the connecting member (4), the opening (14) communicates with the first slide cavity (13), and the movable end (31) of the elastic member (3) extends from the opening (14) and is connected to the elastic action end (42).

7. A passive assist arm according to claim 3, characterized in that a first slide cavity (13) is formed in the main body support portion (1), the adjustment end (32) of the elastic member (3) is provided in the first slide cavity (13), an opening (14) is formed at the end of the main body support portion (1) that approaches the connecting member (4), the opening (14) communicates with the first slide cavity (13), the movable end (31) of the elastic member (3) extends from the opening (14) and is connected to the elastic action end (42), a perforation opening (15) is formed in the main body support portion (1), the perforation opening (15) communicates with the first slide cavity (13) and causes the tension member (51) to extend from the first slide cavity (13).

8. The passive assist arm according to claim 1, characterized in that the main body support portion (1) has at least one stopper roller (8) rotatably provided in the opening (14), and when the movable end (31) of the elastic member (3) is displaced from the main body support portion (1), the elastic member (3) comes into contact with the outer circumferential surface of the stopper roller (8).

9. A wearable device comprising a belt (02) and a strap (01), wherein the strap (01) is connected to the belt (02), the strap (01) is used to be attached to the shoulder of a person, and the belt (02) is used to wrap around and tie the waist of a person, comprising a passive assist arm as described in claim 1, further comprising an extension rod (18) and an adjustment base (9), wherein the adjustment base (9) is fixed to a main body support (1), the extension rod (18) is drilled into the adjustment base (9), one end of the extension rod (18) is fixed to the belt (02) and the other end extends into the main body support (1), the adjustment base (9) is provided with a lock screw (91) for locking the position of the extension rod (18), and the end of the main body support (1) that is separated from the extension rod (18) is fixed to the strap (01).

10. The wearable device according to claim 9, characterized in that a lock block (92) is provided at the end of the lock screw (91) that approaches the extension rod (18), the lock block (92) is attached to the extension rod (18), and the lock screw (91) drives the lock block (92) to move in a direction toward or toward the extension rod (18).

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