Passive assist arm and wearable device

Abstract

The present application relates to the field of exoskeletons. Specifically, disclosed are a passive assist arm and a wearable device. The passive assist arm comprises a main body support part, a rotary swing arm and an elastic member. The main body support part serves as a main body structure, and is separately connected to the waist and shoulder of a human body, so as to support the overall structure of the assist arm. The rotary swing arm is movably connected to the main body support part, and synchronously swings along with the arm of a wearer. The elastic member is arranged in the main body support part, and is connected to the rotary swing arm. The elastic member contracts to pull the rotary swing arm to rotate in the direction away from the waist of the human body, so as to provide assisting force. In addition, the elastic member is connected to a tensioning member, and the main body support part is provided with a locking base used for locking the tensioning member; the magnitude of the elastic force of the elastic member can be adjusted and maintained simply by pulling the tensioning member and locking same, thus adjusting the assisting force. The present application has the advantages of adjustable assisting force, simple and stable structure and low implementation costs.

Description

Passive power assist arms and wearable devices Technical Field

[0001] This application relates to the field of exoskeletons, and more particularly to a passive power-assisted arm and wearable device. Background Technology

[0002] Currently, active power assist devices are gradually being adopted in some work scenarios in logistics warehousing, industrial manufacturing, and military industries to reduce the workload of workers, alleviate muscle fatigue and injury, improve work efficiency, and reduce the occurrence of safety accidents.

[0003] However, currently used active power assist devices cannot provide assistance with force values ​​that are appropriate for the work content. If the force value provided is too small, it cannot meet the assistance needs in actual work, while if the force value provided is too large, it is easy to cause some destructive accidents, resulting in damage to certain workpieces, products and other components. Summary of the Invention

[0004] To facilitate adjustment of the assistance level of the active power assist device, this application provides a passive power assist arm and wearable device, which can adjust the assistance level as needed to adapt to different working conditions, and has a simple and stable structure with low implementation cost.

[0005] Firstly, the passive power-assisted arm provided in this application adopts the following technical solution.

[0006] A passive power-assisted arm includes:

[0007] Main support section;

[0008] The connector is rotatably mounted on the main support and has at least one fixed end and one elastic end.

[0009] Rotate the swing arm and fix it to the fixed end;

[0010] An elastic element, wherein the movable end of the elastic element is connected to the elastic force application end and is used to pull the rotating swing arm to rotate, and the adjusting end of the elastic element is movably disposed on the main support part;

[0011] An adjustment and locking mechanism is provided on the main support section and is used to adjust and lock the position of the adjusting end of the elastic element on the main support section to adjust the amount of assistance.

[0012] In the above technical solution, the elastic element pulls the connecting element to drive the rotating arm to rotate, thereby providing assistance when the user's arm lifts heavy objects and reducing labor burden; the adjusting locking mechanism adjusts the position of the adjusting end of the elastic element on the main support, changing the degree of tension of the elastic element, adjusting the elastic force, and thus adjusting the amount of assistance from the assist arm. Users can thus flexibly adjust the appropriate assistance according to different working conditions and scenarios, improving the applicability of the assist device, meeting assistance needs while avoiding component damage.

[0013] Optionally, the adjusting locking mechanism includes a tensioning member and a locking seat. The tensioning member is connected to the adjusting end of the elastic member and has a range of motion that moves the adjusting end of the elastic member away from the moving end of the elastic member. The locking seat is used to lock the position of the tensioning member.

[0014] By adopting the above technical solution, the elastic element can be stretched by pulling the adjusting end of the elastic element with the tensioning component, thereby increasing the elastic force of the elastic element and thus increasing the assist. At the same time, the tensioning component is locked with the locking seat, so that the elastic element can maintain the adjusted elastic force to meet the assist requirements. When it is necessary to reduce the assist, the tensioning component is released by using the locking seat, and the elastic element can be automatically reset. After adjusting to the required size, the tensioning component is locked again. The adjustment structure is simple, stable, and easy to operate. Moreover, the wearer can keep the assist arm in the wearing state and directly adjust the assist size of the assist arm with the tensioning component without removing the assist arm, which greatly improves the convenience and efficiency of assist adjustment.

[0015] Optionally, the tensioning element is a flexible pull rope.

[0016] The tensioning components of flexible structures are easier to set up, which improves adaptability and reduces assembly difficulty.

[0017] Optionally, the locking seat includes a seat body and at least one movable part. The seat body is mounted on the main support part, and the movable part is movably disposed on the seat body. The movable part has at least one end face that cooperates with the seat body to clamp and tighten a tensioning member.

[0018] By adopting the above technical solution, the tensioning component is locked by the clamping action between the movable part and the seat. The switching between the unlocking and locking states is very convenient, easy to operate, and the structure is simple and durable.

[0019] Optionally, the end face is formed with a plurality of protrusions.

[0020] The protrusions can increase the friction between the end face and the tensioning element, thereby improving the locking effect.

[0021] Optionally, the main support portion forms a first sliding cavity, the adjustment end of the elastic element is disposed in the first sliding cavity, the end of the main support portion near the connector forms an opening, the opening is connected to the first sliding cavity, and the movable end of the elastic element extends out from the opening to connect to the elastic force application end.

[0022] By adopting the above technical solution, the main support part can isolate and protect the internal elastic components, preventing them from being worn, and the external structure is neat and beautiful; at the same time, the main support part restricts the expansion and contraction path of the elastic components, preventing them from getting tangled, and improving the stability of the elastic components during expansion and contraction.

[0023] Optionally, the main support portion forms a first sliding cavity, the adjusting end of the elastic element is disposed in the first sliding cavity, the end of the main support portion near the connector forms an opening, the opening is connected to the first sliding cavity, the movable end of the elastic element extends out from the opening to connect to the elastic force end, the main support portion forms a through-hole, the through-hole is connected to the first sliding cavity, so that the tensioning element can extend out from the first sliding cavity.

[0024] By adopting the above technical solution, the tensioning component can be extended from the insertion port for manual gripping. Pulling the tensioning component changes the position of the elastic adjustment end, thereby adjusting the amount of assistance. At the same time, the elastic component is kept within the main support part and is not disturbed by the outside, which further improves the protection effect of the elastic component and thus improves the durability of the device. Meanwhile, the flexible rope body makes it easy for the tensioning component to extend from the insertion port, and the assembly difficulty is low.

[0025] Optionally, the main support portion is rotatably provided with at least one limiting roller at the opening, and when the movable end of the elastic member deviates from the main support portion, the elastic member abuts against the outer circumference of the limiting roller.

[0026] By adopting the above technical solution, the limiting roller limits the extension, contraction and swing of the elastic element, improves the stability of the elastic element, and avoids the elastic element from contacting the hollow rod body and causing wear, thus improving durability.

[0027] Secondly, the wearable device provided in this application adopts the following technical solution.

[0028] A wearable device includes a waist belt, a back strap, and the aforementioned passive assistive arm. The back strap is connected to the waist belt and is worn on the shoulders of a person. The waist belt is used to wrap around the waist of a person. The device also includes an extension rod and an adjustment seat. The adjustment seat is fixed to a main support portion. The extension rod passes through the adjustment seat. One end of the extension rod is fixed to the waist belt, and the other end extends into the main support portion. The adjustment seat is provided with a locking screw for locking the position of the extension rod. The end of the main support portion away from the extension rod is fixed to the back strap.

[0029] By adopting the above technical solution, the distance between the rotating arm and the waist belt can be adjusted by adjusting the length of the extension rod, so as to match wearers of different body types and improve the adaptability of the wearable device.

[0030] Optionally, a locking block is provided at the end of the locking screw near the extension rod. The locking block is attached to the extension rod, and the locking screw drives the locking block to move closer to or further away from the extension rod.

[0031] The locking screw and locking block work together to quickly switch between the unlocked and locked states of the extension rod, making it convenient to use and effectively improving adjustment efficiency.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The elastic element pulls the connecting part to drive the rotating arm to rotate, thereby providing assistance when the human arm lifts heavy objects and reducing labor burden; the adjustment locking mechanism adjusts the position of the adjustment end of the elastic element on the main support part, thereby changing the degree of tension of the elastic element, thereby adjusting the elastic force, and thus adjusting the assistance of the assist arm. This allows the user to flexibly adjust the appropriate assistance according to different working conditions and scenarios, improving the applicability of the assist device, meeting the assistance needs, and avoiding damage to components.

[0034] 2. By using the tensioning element to pull the adjusting end of the elastic element, the elastic element can be stretched to increase its elastic force and thus increase the assist. At the same time, the tensioning element is locked with the locking seat to keep the elastic element with the adjusted elastic force to meet the assist requirements. When it is necessary to reduce the assist, the tensioning element is released with the locking seat to allow the elastic element to automatically reset. After adjusting to the required size, the tensioning element is locked again. The adjustment structure is simple, stable, and easy to operate.

[0035] 3. The main support section isolates and protects the internal elastic components, preventing wear and tear, and ensuring a neat and aesthetically pleasing external structure. Simultaneously, the main support section restricts the expansion and contraction path of the elastic components, preventing entanglement and improving stability during expansion and contraction. Attached Figure Description

[0036] Figure 1 is a schematic diagram of the overall structure of the passive assistive arm used to illustrate an embodiment of this application.

[0037] Figure 2 is a half-sectional view of Figure 1;

[0038] Figure 3 is a schematic diagram illustrating the opening in an embodiment of this application;

[0039] Figure 4 is a schematic diagram of the overall structure of an embodiment of this application;

[0040] Figure 5 is a schematic diagram illustrating the adjustment seat according to an embodiment of this application.

[0041] Reference numerals: 01, shoulder strap; 02, waist belt; 1, main support part; 11, hollow rod; 111, first rod; 112, second rod; 12, extension plate; 13, first sliding cavity; 14, opening; 15, through-hole; 16, limiting block; 17, limiting hole; 18, extension rod; 19, mounting plate; 2, rotating swing arm; 3, elastic element; 31, movable end; 32, adjusting end; 4, connecting element; 41, fixed end; 42, elastic force acting end; 43, clearance opening; 5, adjusting locking mechanism; 51, tensioning element; 52, locking seat; 521, seat body; 522, movable part; 523, end face; 6, mounting roller; 7, connecting block; 8, limiting roller; 9, adjusting seat; 91, locking screw; 92, locking block. Detailed Implementation

[0042] The present application will be further described in detail below with reference to Figures 1-3.

[0043] This application discloses a passive power-assisting arm. Referring to Figures 1 and 2, it includes a main support portion 1, a rotating arm 2, an elastic element 3, and a connector 4. The main support portion 1 serves as the main structure and can be connected to the wearer's waist and / or shoulder to support the overall structure of the power-assisting arm. At least one end or protrusion of the main support portion 1 is located on the wearer's shoulder, serving as a hinge point for mounting the connector 4. The connector 4 can rotate relative to the main support portion 1 around this hinge point. The connector 4 is connected to both the rotating arm 2 and the elastic element 3. The rotating arm 2 is bound to the user's arm, and the elastic element 3 is disposed on the main support portion 1 and acts on the connector 4.

[0044] When a user wears this passive power arm to lift heavy objects, the user swings their arm downwards to grasp the object. During this swing, the rotating arm 2 moves accordingly, pulling the connecting piece 4 to rotate around the hinge point. At this time, the elastic element 3 is stretched. When the user lifts the object upwards, the rotating arm 2 rises. At this time, the elastic element 3 begins to contract due to its own elasticity. This contraction force acts on the connecting piece 4, giving it a rotational force. This rotational force drives the rotating arm 2 to rise upwards, thus assisting the user in lifting heavy objects.

[0045] Specifically, referring to Figures 1 and 2, the connector 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 connector 4 body extending in two directions with the hinge point as the origin, and the included angle between the extending directions of the fixed end 41 and the elastic end 42 is an obtuse angle. The fixed end 41 is fixed to the rotating arm 2, and the elastic end 42 is connected to the elastic element 3. In use, the contraction force of the elastic element 3 acts on the elastic end 42, pulling the connector 4 to rotate as a whole, providing torque to the fixed end 41, and driving the rotating arm 2 to rise, thus providing assistance to the wearer.

[0046] In this embodiment, the connector 4 is a one-piece molded structure to enhance the overall structural strength. Furthermore, the surface of the connector 4 has a perforated structure to achieve lightweight and material-saving properties.

[0047] Preferably, the connector 4 has a plug-in part at the fixed end 41, and the end of the rotating arm 2 has a corresponding plug-in groove. The plug-in part is plugged into the plug-in groove to assemble the connector 4 and the rotating arm 2 together. The two are further fixed by bolts.

[0048] Further, referring to Figures 1 and 2, the elastic member 3 has at least one movable end 31 connected to the elastic action end 42 of the connecting member 4, and an adjustment end 32 movably disposed on the main support part 1. An adjustment locking mechanism 5 is provided on the main support part 1 to adjust and lock the position of the adjustment end 32 of the elastic member 3 on the main support part 1. By using the adjustment locking mechanism 5 to move the adjustment end 32 of the elastic member 3 closer to or further away from the hinge point of the connecting member 4, the degree of tension of the elastic member 3 during the rotation of the connecting member 4 can be changed, thereby adjusting the elastic force of the elastic member 3 and changing the amount of assistance provided by the assist arm.

[0049] In this embodiment, the elastic element 3 is preferably an elastic band. Elastic bands are lightweight and durable, and they do not generate noise or vibrate significantly during expansion and contraction. Furthermore, elastic bands have good flexibility, are easy to install, and maintain their elasticity even when bent.

[0050] Referring to Figures 2 and 3, the main support part 1 includes a hollow rod 11 and two extension plates 12. One end of the hollow rod 11 is located at the shoulder of the human body, and the other end is located at the waist of the human body. The end of the hollow rod 11 located at the shoulder of the human body extends away from the other end to form four mounting plates 19. The four mounting plates 19 face each other in pairs and are coplanar in pairs. The two coplanar mounting plates 19 form mounting surfaces for the extension plates 12 to be installed. The two extension plates 12 are respectively installed on the two mounting surfaces.

[0051] Meanwhile, the two extension plates 12 extend towards the human shoulder joint, and the connector 4 is hinged between the ends of the two extension plates 12 away from the hollow rod 11, so that the hinge point of the connector 4 is closer to the human shoulder joint, improving the adaptability of the rotating arm 2 when rotating synchronously with the human arm. In addition, the elastic element 3 is provided in the hollow rod 11, and the extension plates 12 make the hinge point of the connector 4 away from the elastic element 3, so as to increase the force applied by the elastic element 3 and improve the assist effect.

[0052] Further, referring to Figures 2 and 3, a first sliding cavity 13 is formed inside the hollow rod body 11, and an opening 14 is formed at the end of the hollow rod body 11 near the mounting plate 19, which is connected to the first sliding cavity 13. The adjusting end 32 of the elastic element 3 is slidably disposed in the first sliding cavity 13 and connected to the adjusting locking mechanism 5. The movable end 31 of the elastic element 3 extends out from the opening 14 and is connected to the elastic force end 42 of the connecting member 4. The hollow rod body 11 can isolate and protect the elastic element 3, preventing wear during use due to exposure or snagging on other structures, and making the external structure neat and aesthetically pleasing. At the same time, the inner wall of the first sliding cavity 13 can restrict the extension and retraction path of the elastic element 3, preventing the elastic element 3 from getting tangled, and improving the stability of the elastic element 3 during repeated extension and retraction.

[0053] Further, referring to Figures 1 and 3, the connector 4 has a clearance opening 43, which extends from the hinge point of the connector 4 to the elastic end 42. The connector 4 also has a mounting roller 6 at the elastic end 42. The elastic member 3 has two ends, A and B. End A is located in the first sliding cavity 13, and end B extends out from the opening 14, passes through the clearance opening 43, goes around the mounting roller 6, and then extends back into the first sliding cavity 13, where it is connected to the adjusting and locking mechanism 5 together with end A.

[0054] The elastic element 3 has a U-shaped belt. Both ends A and B of the belt are mounted on the main support 1 to form the adjusting end 32 of the elastic element 3. The belt wrapped around the mounting roller 6 forms the movable end 31 of the elastic element 3. This design allows the belt of the elastic element 3 to wrap around the mounting roller 6, eliminating the need for additional connecting or fixing structures between the elastic element 3 and the connecting element 4. This effectively reduces the installation difficulty between the elastic element 3 and the connecting element 4, resulting in a simple and stable structure.

[0055] In use, the wearer raises or lowers their arm to move the rotating arm 2, which in turn causes the connector 4 to rotate. The elastic element 3 stretches or contracts synchronously and swings within the clearance opening 43 in a direction closer to or further away from the hinge point of the connector 4. This reduces friction between the elastic element 3 and the connector 4, thereby reducing wear on the elastic element 3 during use. Furthermore, both ends of the elastic element 3 are hidden within the hollow rod 11, ensuring that the exposed portion of the elastic element 3 extending from the opening 14 has a complete, aesthetically pleasing, and reliable structure.

[0056] Further, referring to Figure 3, four mounting plates 19 are distributed around the opening 14. A limiting roller 8 is rotatably mounted between two mounting plates 19 with opposite surfaces. The axis of the limiting roller 8 is parallel to the axis of the hinge shaft of the connecting member 4. The two limiting rollers 8 are respectively close to both sides of the opening 14, and the movable end 31 of the elastic member 3 passes between the two limiting rollers 8. When the connecting member 4 rotates, causing the movable end 31 of the elastic member 3 to deviate from the axis of the hollow rod 11, the elastic member 3 abuts against the outer surface of the corresponding limiting roller 8, thereby reducing wear caused by the swinging of the elastic member 3 and improving its durability.

[0057] Preferably, the limiting roller 8 is configured as an I-shaped roller, that is, the outer circular surface of the limiting roller 8 has a groove formed along the circumference. When the elastic member 3 swings, it extends into the groove, thereby further limiting the elastic member 3 and improving the stability of the elastic member 3 during extension, contraction and swing.

[0058] Further referring to Figures 1 and 2, the adjusting locking mechanism 5 includes a tensioning member 51 and a locking seat 52. The tensioning member 51 is connected to the adjusting end 32 of the elastic member 3, and the tensioning member 51 has a range of motion to move the adjusting end 32 of the elastic member 3. The locking seat 52 is disposed on the main support part 1 and is used to lock the position of the tensioning member 51.

[0059] The tension of the elastic element 3 is changed by pulling the adjusting end 32 of the elastic element 3 using the tensioning member 51, and the locking seat 52 locks the tensioning member 51 to maintain the position of the adjusting end 32 of the elastic element 3. This adjusts and maintains the tension of the elastic element 3, adjusts the pulling force of the elastic element 3 on the connecting member 4, and thus adjusts the amount of assistance of the assisting arm.

[0060] Further referring to Figure 2, the locking seat 52 includes a seat body 521 and at least one movable part 522. The seat body 521 is fixedly installed on the main support part 1, and the movable part 522 is rotatably installed on the seat body 521. The movable part 522 has an end face 523 that cooperates with the seat body 521 to clamp the tensioning member 51. The tensioning member 51 is inserted between the movable part 522 and the seat body 521. Rotating the movable part 522 causes its end face 523 to press the tensioning member 51 against the seat body 521, thereby locking the tensioning member 51.

[0061] Meanwhile, the hollow rod 11 has a through-hole 15 at the base 521 that communicates with the first sliding cavity 13. The end of the tensioning member 51 away from the elastic member 3 passes through the through-hole 15 and extends outward from the locking seat 52 so that it can be pulled by hand to adjust the position of the adjusting end 32 of the elastic member 3.

[0062] When increased assistance is needed, rotate the movable part 522 so that its end face 523 moves away from the seat 521, release the tensioning member 51, and manually pull the tensioning member 51 to move the adjusting end 32 of the elastic member 3, so that the adjusting end 32 of the elastic member 3 moves away from the movable end 31 of the elastic member 3. After adjusting the adjusting end 32 of the elastic member 3 to a suitable position, rotate the movable part 522 so that its end face 523 clamps the tensioning member 51 with the seat 521, thereby maintaining the position of the adjusting end 32 of the elastic member 3, achieving the purpose of stretching the elastic member 3 and increasing the assistance of the elastic member 3.

[0063] When it is necessary to reduce the assist, rotate the movable part 522 so that its end face 523 is away from the seat 521, and release the tensioning member 51 to quickly release the assist. At this time, the elastic member 3 resets under its own elastic force and pulls the tensioning member 51 to move. When the adjusting end 32 of the elastic member 3 resets to the required position, rotate the movable part 522 again to lock the tensioning member 51.

[0064] Preferably, the end face 523 of the movable part 522 is formed with a plurality of protrusions. The protrusions can increase the friction between the end face 523 and the tensioning member 51, thereby improving the locking effect.

[0065] In this embodiment, the tensioning member 51 is preferably a flexible pull rope. The flexible pull rope is easy to implement, reduces the difficulty of setting up the tensioning member 51, and facilitates the assembly of the overall structure.

[0066] Meanwhile, in order to facilitate the connection between the elastic element 3 and the tensioning element 51, a connecting block 7 is provided at the connection between the elastic element 3 and the tensioning element 51. The A and B ends of the elastic element 3 and the tensioning element 51 are all fixed to the connecting block 7.

[0067] Further, referring to Figure 2, the hollow rod 11 includes a first rod 111 and a second rod 112. A seat 521 is fitted onto the close ends of the first rod 111 and the second rod 112 to coaxially connect them. A first sliding cavity 13 is formed in the first rod 111, and a through-hole 15 is formed by the gap between the first rod 111 and the second rod 112. The split design facilitates the assembly of the elastic element 3 and the tensioning element 51. The tensioning element 51 can be pulled out from the first rod 111 and passed through the seat 521 before connecting the first rod 111 and the second rod 112, reducing assembly difficulty and improving assembly efficiency. In other embodiments, the first rod 111 and the second rod 112 can be integrally formed with a through-hole 15. During assembly, the tensioning element 51 can simply be pulled out from the through-hole 15.

[0068] Further, referring to Figure 2, a limiting block 16 is provided on the outer wall of the second rod 112. The limiting block 16 has an L-shaped limiting hole 17 for the tensioning member 51 to pass through, and the inner wall and opening of the limiting hole 17 are both arc-shaped. The side wall of the limiting hole 17 restricts the movement path of the tensioning member 51, ensuring that part of the movement path of the tensioning member 51 in the seat 521 remains stable, thereby improving the fitting accuracy between the tensioning member 51 and the seat 521.

[0069] Preferably, the limiting block 16 is located near the waist of the wearer to facilitate hand gripping and pulling of the tensioning member 51. Moreover, the wearer can directly adjust the assist level using the tensioning member 51 without removing / taking off the assisting arm, simplifying the assist adjustment process and further improving the convenience of assist adjustment.

[0070] The implementation principle of the passive power-assisted arm disclosed in this application embodiment is as follows: After unlocking the tensioning member 51 with the locking seat 52, pulling the tensioning member 51 causes the adjusting end 32 of the elastic member 3 to move within the first sliding cavity 13, thereby stretching the elastic member 3. Then, locking the tensioning member 51 with the locking seat 52 increases and maintains the elastic force of the elastic member 3, thus increasing the assist. When it is necessary to reduce the assist, simply unlock the locking seat 52, and the tensioning member 51 will automatically reset under the elastic force of the elastic member 3. When adjusted to the appropriate position, locking the tensioning member 51 again with the locking seat 52 is sufficient. The cooperation between the tensioning member 51 and the locking seat 52 enables the adjustment of the assist level, and the adjustment process is simple and quick.

[0071] This application also discloses a wearable device, referring to FIG4, including at least one of the aforementioned passive assistive arms, and further including a waist belt 02 and a back strap 01 connected to each other. The main support portion 1 is connected at both ends to the waist belt 02 and the back strap 01, respectively. The back strap 01 is worn on the shoulders of the human body, and the waist belt 02 is wrapped around the waist of the human body to wear the assistive arms on the body. In this embodiment, the wearable device includes two of the aforementioned passive assistive arms, which are used to assist the arms on both sides respectively.

[0072] Specifically, referring to Figures 4 and 5, an adjustment seat 9 is provided at the end of the second rod 112 away from the first rod 111. The second rod 112 is inserted into the adjustment seat 9 and fixed with bolts. An extension rod 18 slides through the adjustment seat 9. The extension rod 18 is coaxially arranged with the second rod 112. One end of the extension rod 18 is fixed to the waist belt 02, and the other end passes through the adjustment seat 9 and extends into the second rod 112. By adjusting the length of the extension rod 18 outside the second rod 112, the distance between the rotating arm 2 and the waist belt 02 can be adjusted to match wearers of different body types and improve the adaptability of the wearable device.

[0073] Meanwhile, a locking screw 91 is screwed onto the adjusting seat 9. The locking screw 91 is arranged radially along the extension rod 18. A locking block 92 is provided at the end of the locking screw 91 near the extension rod 18. The side of the locking block 92 away from the locking screw 91 is attached to the surface of the extension rod 18. By rotating the locking screw 91, the locking screw 91 moves radially along the extension rod 18. Adjusting the distance between the locking block 92 and the extension rod 18 can lock or release the extension rod 18, thereby adjusting or fixing the position of the extension rod 18.

[0074] The implementation principle of the wearable device disclosed in this application is as follows:

[0075] Rotate the locking screw 91 and move it away from the extension rod 18 to unlock it. Adjust the length of the extension rod 18 according to the wearer's body size to adjust the position of the rotating arm 2 relative to the shoulder, thereby ensuring that the hinge point of the connector 4 is close to the wearer's shoulder joint, improving the adaptability of the assistive arm and thus improving the assistive effect.

[0076] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A passive power-assisted arm, characterized in that, include: Main support section (1); The connector (4) is rotatably mounted on the main support (1) and has at least one fixed end (41) and one elastic end (42). Rotate the swing arm (2) and fix it to the fixed end (41); The elastic element (3) has its movable end (31) connected to the elastic force end (42) and used to pull the rotating arm (2) to rotate. The adjustment end (32) of the elastic element (3) is movably set on the main support part (1). Adjustment locking mechanism (5) is provided on the main support part (1) and is used to adjust and lock the position of the adjustment end (32) of the elastic element (3) on the main support part (1) to adjust the amount of assistance.

2. The passive power-assisted arm according to claim 1, characterized in that: The adjustment and locking mechanism (5) includes a tensioning member (51) and a locking seat (52). The tensioning member (51) is connected to the adjustment end (32) of the elastic member (3). The tensioning member (51) has a range of motion that pulls the adjustment end (32) of the elastic member (3) to move away from the movable end (31) of the elastic member (3). The locking seat (52) is used to lock the position of the tensioning member (51).

3. The passive power-assisted arm according to claim 2, characterized in that: The tensioning element (51) is a flexible pull rope.

4. The passive power-assisted arm according to claim 2, characterized in that: The locking seat (52) includes a seat body (521) and at least one movable part (522). The seat body (521) is mounted on the main support part (1). The movable part (522) is movably disposed on the seat body (521). The movable part (522) has at least one end face (523) that cooperates with the seat body (521) to clamp the tensioning member (51).

5. The passive power-assisted arm according to claim 4, characterized in that: The end face (523) has several protrusions.

6. The passive power-assisted arm according to claim 1, characterized in that: The main support part (1) has a first sliding cavity (13), and the adjustment end (32) of the elastic element (3) is disposed in the first sliding cavity (13). The main support part (1) has an opening (14) at one end near the connector (4). The opening (14) is connected to the first sliding cavity (13). The movable end (31) of the elastic element (3) extends out from the opening (14) to connect to the elastic force end (42).

7. The passive power-assisted arm according to claim 3, characterized in that: The main support part (1) has a first sliding cavity (13), and the adjustment end (32) of the elastic member (3) is disposed in the first sliding cavity (13). The main support part (1) has an opening (14) at one end near the connector (4). The opening (14) is connected to the first sliding cavity (13). The movable end (31) of the elastic member (3) extends out from the opening (14) to connect to the elastic force end (42). The main support part (1) has a through hole (15) which is connected to the first sliding cavity (13) so that the tensioning member (51) can extend out from the first sliding cavity (13).

8. The passive power-assisted arm according to claim 1, characterized in that: The main support part (1) is rotatably provided with at least one limiting roller (8) at the opening (14). When the movable end (31) of the elastic element (3) deviates from the main support part (1), the elastic element (3) abuts against the outer surface of the limiting roller (8).

9. A wearable device comprising a waist belt (02) and a shoulder strap (01), the shoulder strap (01) being connected to the waist belt (02), the shoulder strap (01) being worn on the shoulders of a person, and the waist belt (02) being used to wrap around the waist of a person, characterized in that: The passive power arm according to claim 1 further includes an extension rod (18) and an adjustment seat (9). The adjustment seat (9) is fixed to the main support part (1). The extension rod (18) passes through the adjustment seat (9). One end of the extension rod (18) is fixed to the waist belt (02), and the other end extends into the main support part (1). The adjustment seat (9) is provided with a locking screw (91) for locking the position of the extension rod (18). The end of the main support part (1) away from the extension rod (18) is fixed to the back strap (01).

10. The wearable device according to claim 9, characterized in that: The locking screw (91) has a locking block (92) at the end near the extension rod (18). The locking block (92) is attached to the extension rod (18). The locking screw (91) drives the locking block (92) to move closer to or further away from the extension rod (18).

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