Wearable passive power assisting device capable of adjusting strength

Abstract

The invention relates to the technical field of wearable power assisting devices, in particular to a wearable passive power assisting device with adjustable force. The device comprises a back plate, shoulder straps, a knee binding part, an elastic energy storage mechanism and an adjusting mechanism, and particularly, due to the design of the elastic energy storage mechanism and the adjusting mechanism, the elastic energy storage mechanism comprises an elastic belt; the elastic band is arranged between the back plate and the knee binding part, one end of the elastic band is connected with the knee binding part, the other end of the elastic band is a movable end, and the movable end penetrates through the first connecting part and is in sliding fit with the first connecting part; the adjusting mechanism comprises a length-adjustable adjusting belt, one end of the adjusting belt is fixedly connected with the shoulder belt, and the other end of the adjusting belt is fixedly connected with the movable end of the elastic belt. According to the power assisting device, precise control over the power assisting strength is achieved through the length-adjustable adjusting belt, a wearer can adjust the power assisting strength according to actual requirements, and the using flexibility and adaptability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of passive power-assisting devices, and in particular to a wearable passive power-assisting device with adjustable force. Background Art

[0002] In some work scenarios in the fields of logistics warehousing, industrial manufacturing, military industry, etc., power-assist devices (exoskeletons) have been gradually adopted to reduce user fatigue, reduce user muscle damage, reduce the occurrence of safety accidents, and improve work efficiency. And compared with active power-assist devices, passive power-assist devices are widely used because of their advantages such as low cost, easy to wear, and flexible use.

[0003] Passive power-assisting devices usually achieve power assistance through elastic energy storage mechanisms. For example, when carrying heavy objects, the elastic energy storage mechanism stores energy through elastic deformation. When lifting heavy objects, the elastic energy storage mechanism can apply elastic potential energy to the heavy objects, thereby reducing the worker's sense of weight, and heavier goods can be carried with less force.

[0004] Although the above passive power-assist devices can meet the needs to a certain extent, there are still some shortcomings. Especially in dynamic environments, such as frequent load changes or non-power-assist actions, the fixed elastic energy storage mechanism is difficult to adjust the force in real time, resulting in unnecessary resistance when power is not needed. This will not only increase the wearer's discomfort, but also hinder their normal walking and other activities, thereby affecting the overall work efficiency and comfort.

[0005] Therefore, how to design a passive power assist device that can flexibly adjust the power assist amount has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] The present application provides a wearable passive power assist device with adjustable power, which can flexibly adjust the power assist, provide better power assist, and not easily interfere with the normal walking of the wearer. The following technical solutions are adopted: A wearable passive power assist device with adjustable force, comprising: A back plate, the back plate is arranged vertically; a first connecting portion is arranged on the back plate; A shoulder strap, one end of which is fixedly connected to the upper side of the back panel, and the other end is arranged on the front side of the back panel; Knee binding, located below the backboard; The elastic energy storage mechanism comprises an elastic belt; the elastic belt is arranged between the back plate and the knee binding, one end of the elastic belt is connected to the knee binding, and the other end is a movable end, the movable end passes through the first connecting part and slidably cooperates with the first connecting part; The adjusting mechanism comprises an adjusting belt with adjustable length, one end of which is fixedly connected to the shoulder belt, and the other end of which is fixedly connected to the movable end of the elastic belt.

[0007] By adopting the above technical solution, the wearable passive power-assisting device with adjustable force can effectively provide power assistance while avoiding unnecessary resistance to the wearer's normal walking. Specifically: the backboard serves as the main supporting structure to ensure the stability and comfort of the device. The design of the shoulder straps enables the device to be firmly fixed to the user to prevent slipping or loosening. The knee binding works in conjunction with the elastic energy storage mechanism to store and release energy when needed, reducing the burden on the user. The adjustable length adjustment strap achieves precise control of the power assistance, allowing the wearer to adjust the power assistance intensity according to actual needs, improving the flexibility and adaptability of use.

[0008] In addition, the shoulder straps, adjustment straps and elastic energy storage mechanism are interconnected, and the tension of the elastic energy storage mechanism will be transmitted to the shoulder straps, which can effectively ensure the stability of the elastic energy storage structure after adjustment, and can also further improve the stability of the shoulder straps and back panel.

[0009] Preferably, the first connection parts are provided with two and are respectively located on both sides of the back plate in the width direction; the second connection part is provided at the center position of the back plate in the width direction; the knee binding is provided with two and both have a third connection part; The elastic band is arranged in a W shape, and both ends of the elastic band are movable ends; the elastic band also has an upper inflection point and two lower inflection points located between the two movable ends; the upper inflection point is slidably connected to the second connecting part; the two lower inflection points correspond to the two third connecting parts one by one and are slidably connected to the third connecting parts; The adjustment mechanism is provided in two groups and is respectively located at two sides in the width direction of the back plate and is connected with the two movable ends in a one-to-one correspondence.

[0010] By adopting the above technical solution, the device can more accurately adjust the strength of the elastic energy storage mechanism, so that the wearer can obtain the best power-assisting effect under different working conditions. Specifically: Two first connection parts and one second connection part and corresponding knee bindings are provided so that the elastic belt can be arranged in a W shape. This layout not only increases the effective stroke of the elastic belt, but also better disperses the points of force application to ensure an evenly distributed power-assisting effect. The upper inflection point is slidably connected to the second connection part, while the two lower inflection points are slidably connected to the third connection part respectively. This design can make the elastic belt smoother when stretched or contracted, avoiding discomfort caused by sudden force. The adjustment mechanism is arranged in two groups and is located on both sides of the back panel width direction, and is connected to the two movable ends one by one, which further improves the adjustment accuracy, allowing the wearer to fine-tune the power-assisting strength of each part according to actual needs, thereby achieving the best use experience.

[0011] Preferably, the adjustment belt is arranged obliquely, and one end of the adjustment belt connected to the shoulder strap is located above the other end.

[0012] By adopting the above technical solution, the adjustment belt is set diagonally, and the end connected to the shoulder strap is located above the other end, so that the adjustment belt can remain stable in different postures, avoiding adjustment failure caused by posture changes. At the same time, this layout method helps to disperse the force points, reduce local pressure, and improve wearing comfort. In addition, the diagonal setting can better adapt to ergonomic design and further enhance the user's operating experience.

[0013] Preferably, it also includes a waist binding, which includes a front belt and a rear belt, the rear belt is arranged at the lower position of the back plate and is fixedly connected to the back plate; the front belt and the rear belt are detachably connected; the length of the front belt is adjustable.

[0014] By adopting the above technical solution, the waist binding design allows the wearer to better adapt to the needs of different body shapes, improving the applicability and comfort of the device. The detachable connection design between the front belt and the rear belt facilitates the wearing and taking off process, and also increases the flexibility of the structure. The adjustable length setting of the front belt further enhances the possibility of personalized adjustment, ensuring the stability and comfort of the wearer in various activities.

[0015] Preferably, the back panel is also connected to a ventral strap, one end of the ventral strap is fixedly connected to the upper position of the back panel, and the other end is connected to the front waist belt.

[0016] By adopting the above technical solution, the ventral strap is connected to the back plate and the front waist belt, which can effectively enhance the overall stability of the device, prevent slippage or displacement caused by uneven force during the power-assisting process, and ensure that the wearer is safer and more reliable when carrying. In addition, the design of the ventral strap can also disperse some waist pressure, reduce the discomfort caused by long-term wearing, and further improve the user experience.

[0017] Preferably, the adjustment mechanism further comprises a guard plate, one end of which is fixedly connected to the back plate, and the other end of which extends to the front side of the back plate, and the adjustment belt fits the guard plate; the guard plate is arc-shaped so as to fit the human body.

[0018] By adopting the above technical solution, the design of the guard plate makes the adjustment belt closer to the human body curve, reducing the discomfort when wearing and improving the comfort. At the same time, the existence of the guard plate can effectively prevent the adjustment belt from shifting or falling off during exercise, ensuring the stability and reliability of the adjustment mechanism, and further improving the overall performance of the device and user experience.

[0019] Preferably, the ventral strap and the adjustment strap are arranged crosswise, and the guard plate is provided with a through hole for the ventral strap to pass through.

[0020] By adopting the above technical solution, the cross-setting of the ventral strap and the adjustment strap can effectively disperse the force on various parts of the wearer's body, avoiding discomfort or injury caused by excessive local force. At the same time, the through-hole design on the guard plate ensures that the ventral strap passes smoothly, thereby achieving the fixation of the ventral strap, improving the stability of the ventral strap, reducing the deviation during work, reducing friction and restraint, and improving comfort and flexibility.

[0021] Preferably, a shoulder support plate is arranged above the back plate, and the shoulder support plate is vertically slidably connected to the back plate and is detachably arranged; The shoulder support plate is also provided with a load-bearing belt, and the load-bearing belt is connected with a hand hook for hooking goods.

[0022] By adopting the above technical solution, the shoulder support plate is vertically slidably connected to the back plate and is detachable, so that the user can adjust the height of the shoulder support plate according to their own needs, which improves comfort and applicability. At the same time, the load-bearing belt and hand hook design on the shoulder support plate can conveniently hook goods, reducing the burden of users when carrying heavy objects, and further improving the practicality and power-assisting effect of the device.

[0023] Preferably, the load-bearing belt includes a basic belt and an additional belt, the basic belt is elastic and fixedly connected to the shoulder support plate, the additional belt is a non-elastic belt and is folded, a plurality of connection points are spaced apart on the additional belt, and the additional belt is fixedly connected to the basic belt via the connection points.

[0024] By adopting the above technical solution, when the hand hook is not bearing any load, the basic belt is in a relaxed state, and the additional belt is in a folded and wrinkled state. When the force carried on the hand hook gradually increases, the basic belt is gradually tightened and stretched, and the additional belt is also stretched. At this time, the force acting on the hand hook is mainly transmitted from the basic belt to the shoulder support plate. When the force carried on the hand hook increases to the point where the additional belt is fully relaxed, the overall length of the weight-bearing belt will no longer be stretched, and the force transmitted by the basic belt reaches the maximum value. Thereafter, when the force carried on the hand hook increases again, the force transmitted by the basic belt is still F1, while the force transmitted by the additional belt gradually increases. Therefore, this structure can provide the wearer with assistance when lifting heavy objects, and improves the durability and reliability of such structures.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By setting an adjustable length adjustment belt, the tension of the elastic energy storage mechanism can be flexibly adjusted, so as to provide a suitable power assisting size under different load conditions, which effectively solves the problem that the existing passive power assisting device cannot flexibly adjust the power assisting size; 2. The adjustment belt is connected to the active ends of the shoulder strap and the elastic belt, so that the wearer can quickly adapt to different working environments by simply adjusting the belt, which improves the flexibility and convenience of use, reduces unnecessary resistance, and avoids interference with normal walking; 3. The elastic belt is arranged in a W shape and connected to the back panel and knee bindings through multiple sliding connection points, ensuring stability and reliability under various posture changes, and further improving the uniform distribution of the power-assisting effect and wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the rear side of the passive power-assisting device in an embodiment of the present application; Figure 2 is a schematic diagram of the front side of the passive power-assisting device in an embodiment of the present application; Figure 3 It is a schematic diagram of the structure of the back plate and the shoulder support plate in the embodiment of the present application.

[0027] Markings in the accompanying drawings: 1. back plate; 11. first connection part; 12. second connection part; 13. shoulder support plate; 14. weight belt; 141. basic belt; 142. additional belt; 15. fastener; 16. hand hook; 2. shoulder strap; 3. knee binding; 31. third connection part; 4. elastic energy storage mechanism; 41. elastic belt; 411. movable end; 412. upper inflection point; 413. lower inflection point; 5. adjustment mechanism; 51. adjustment belt; 6. waist binding; 61. front waist belt; 62. rear waist belt; 7. ventral strap. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 -Attached Figure 3 The present invention is described in further detail.

[0029] The wearable passive power-assisting device with adjustable force provided in the embodiment of the present application can flexibly adjust the magnitude of the power assistance during use to prevent the wearer from experiencing unnecessary resistance during non-power-assisting actions such as walking.

[0030] Specifically, the passive power assist device includes a backboard 1, shoulder straps 2, waist bindings 6, knee bindings 3, an elastic energy storage mechanism 4 and an adjustment mechanism 5. The backboard 1 is made of a hard elastic material and is ergonomically designed to fit the back of the human body. The backboard 1 is vertically arranged, the shoulder straps 2 are arranged at the upper part of the backboard 1 and are fixedly connected to the backboard 1, and the waist bindings 6 are arranged at the lower part of the backboard 1 and are fixedly connected to the backboard 1. The wearer can fix the backboard 1 to the back through the shoulder straps 2 and the waist bindings 6.

[0031] The knee binding 3 can be directly tied to the user's knee. The elastic energy storage mechanism 4 is mainly composed of an elastic belt 41, which is arranged between the knee binding 3 and the back plate 1, and can connect the back plate 1 and the knee binding 3, so as to provide rebound assistance when the user performs carrying actions such as bending. The adjustment mechanism 5 is arranged between the shoulder strap 2 and the back plate 1, and can adjust the length of the elastic belt 41 between the back plate 1 and the knee binding 3, so as to flexibly adjust the assistance strength of the elastic belt 41.

[0032] Specifically, in order to achieve the connection between the backboard 1 and the knee binding 3, the lower part of the backboard 1 is provided with a first connection part 11 and a second connection part 12, two first connection parts 11 are provided and are respectively located on both sides of the width direction of the backboard 1, and the second connection part 12 is provided at the center of the width direction of the backboard 1. Two knee bindings 3 are provided, corresponding to the two knees of the wearer. Both knee bindings 3 have a third connection part 31.

[0033] In the present application, the first connection part 11 and the second connection part 12 are both ring-shaped, and the second connection part 12 is set to be hook-shaped. The elastic band 41 is arranged in a W shape, and has an upper inflection point 412, two lower inflection points 413 and two ends, both of which are movable ends 411 and are inserted into the first connection part 11, the upper inflection point 412 is hung on the second connection part 12, and the two lower inflection points 413 are inserted into the third connection part 31. In this way, the connection between the two knee bindings 3 and the back plate 1 is achieved, and due to the setting of a whole elastic band 41, the two knee bindings 3 can be linked to each other, thereby automatically balancing the force provided to the legs, ensuring that the pulling force on both sides is always the same, and improving the balance of the assistance. Avoid accidents such as the wearer falling due to imbalance of the assistance.

[0034] Furthermore, in order to adjust the length of the elastic band 41 between the back panel 1 and the knee binding 3, the adjustment mechanism 5 includes an adjustment band 51 with adjustable length, one end of the adjustment band 51 is fixedly connected to the shoulder strap 2, and the other end is fixedly connected to the movable end 411 of the elastic band 41. By adjusting the length of the adjustment band 51, the movable end 411 is pulled to move, thereby adjusting the tension of the elastic band 41, so that the wearer can flexibly adjust the assistance strength of the elastic band 41.

[0035] The adjusting belt 51 can be connected to the shoulder strap 2 through a Japanese buckle to adjust the length of the adjusting belt 51. In addition, the adjusting end of the adjusting belt 51 is arranged at the shoulder strap 2, so when wearing, the adjusting end of the adjusting belt 51 is located at the front of the wearer, which is convenient for the wearer to operate.

[0036] The waist binding 6 includes a front belt 61 and a rear belt 62. The rear belt 62 is arranged at the lower position of the back plate 1 and is fixedly connected to the back plate 1. The front belt 61 and the rear belt 62 are detachably connected, and the length of the front belt 61 is adjustable.

[0037] Specifically, the front waistband 61 and the rear waistband 62 can be made of the same material and structure, i.e., a wide nylon webbing covered with a soft breathable material. The front end of the front waistband 61 can be connected to the rear waistband 62 by means of Velcro or buckles, etc., for easy wearing and adjustment. A layer of soft padding can be embedded inside the front waistband 61 to increase comfort and support. The length of the front waistband 61 can be adjusted according to the body shape of different users to ensure that it is tightened without compressing the skin.

[0038] This embodiment is suitable for work scenarios that require greater assistance, such as carrying heavy objects, lifting heavy equipment, etc. By changing the adjustment belt 51, the tension of the elastic belt 41 can be flexibly adjusted to control the amount of assistance. When greater assistance is needed, tighten the adjustment belt 51 to make the elastic belt 41 in a more tense state to generate assistance; conversely, when walking normally or requiring less assistance, release the adjustment mechanism 5, extend the length of the adjustment belt 51, and relax the elastic belt 41. This design can not only provide efficient assistance support, but also reduce unnecessary resistance during non-assistance actions, thereby improving the wearer's comfort and work efficiency.

[0039] The present application further adds a ventral strap 7. One end of the ventral strap 7 is fixedly connected to the upper position of the back plate 1, and the other end is connected to the front waist belt 61. The design of the ventral strap 7 strengthens the support of the abdomen and improves the overall stability of the device. One end of the ventral strap 7 is fixedly connected to the upper position of the back plate 1, and the other end is connected to the front waist belt 61. The ventral strap 7 can be made of a material with good elasticity, such as elastic cotton cloth or elastic mesh cloth, which can provide necessary support without excessive restraint.

[0040] Furthermore, the ventral strap 7 and the adjustment strap 51 are arranged crosswise, so that a stable triangular structure can be formed to enhance the overall stability.

[0041] The present application further adds a guard plate. One end of the guard plate is fixedly connected to the back plate 1, and the other end extends to the front side of the back plate 1. The adjustment belt 51 fits the guard plate, and the guard plate is arranged in an arc shape so as to fit the human body. The ventral strap is arranged crosswise with the adjustment belt 51, and a through hole is arranged on the guard plate for the ventral strap to pass through.

[0042] Specifically, the guard plate can be made of a lightweight and high-strength material, such as polycarbonate or ABS plastic, with a smooth surface and a certain degree of flexibility. The inner side of the guard plate can be covered with a layer of soft padding to increase comfort. The arc-shaped design of the guard plate allows it to fit naturally with the human chest, reducing friction and indentations. The guard plate is provided with a through hole for the ventral strap to pass through, and the through hole can be circular or oval with smooth edges. The guard plate can effectively prevent the adjustment belt 51 from shifting or falling off during use, ensuring the stability and reliability of the adjustment mechanism 5, and further improving the overall performance of the device and user experience.

[0043] The wearable passive power-assisting device with adjustable force provided in the embodiment of the present application also includes a shoulder support plate 13 and a weight belt 14. The shoulder support plate 13 is arranged above the back plate 1 and is vertically slidably connected to the back plate 1 to adjust the height of the shoulder support plate 13 and adapt to users of different heights. The shoulder support plate 13 is located above the shoulder strap 2. When in use, the shoulder support plate 13 does not contact the wearer's shoulder, so that the pressure is transmitted to the wearer's waist and back through the back plate 1, reducing the pressure and discomfort on the shoulder when wearing the device.

[0044] In addition, the bottom of the shoulder support plate 13 is connected to the back plate 1 via a threaded fastener 15, so that the shoulder support plate 13 is detachable. When the shoulder support plate 13 is detached, the device can be used alone as a waist-assisting exoskeleton.

[0045] The weight belt 14 is divided into two parts: a basic belt 141 and an additional belt 142. The basic belt 141 is elastic and fixedly connected to the shoulder support plate 13. The additional belt 142 is a non-elastic belt 41, which is folded and fixedly connected to the basic belt 141 at the folded part. A hand hook 16 is also connected to the basic belt 141, and the hand hook 16 is used to hang a heavy object.

[0046] When the hand hook 16 is not bearing any load, the basic belt 141 is in a relaxed state, and the additional belt 142 is in a folded and wrinkled state. When the force carried on the hand hook 16 gradually increases, the basic belt 141 is gradually tightened and stretched, and the additional belt 142 is also stretched. At this time, the force acting on the hand hook 16 is mainly transmitted from the basic belt 141 to the shoulder support plate 13. When the force carried on the hand hook 16 increases to the point where the additional belt 142 is fully relaxed, the overall length of the weight belt 14 will no longer be stretched, and the force transmitted by the basic belt 141 reaches the maximum value. Thereafter, when the force carried on the hand hook 16 increases again, the force transmitted by the basic belt 141 remains unchanged, while the force transmitted by the additional belt 142 gradually increases. Therefore, this structure can provide the wearer with assistance in lifting heavy objects, and improves the durability and reliability of such structures.

[0047] In summary, the wearable passive power assist device with adjustable force provided in this embodiment is suitable for use in scenarios requiring greater carrying capacity and flexibility, such as carrying large cargo, field exploration, etc. By adding the shoulder support plate 13 and the load-bearing belt 14, the carrying capacity and flexibility of the device can be significantly improved.

[0048] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wearable passive power assist device with adjustable force, characterized in that: include: A back plate (1), the back plate (1) being arranged vertically; a first connecting portion (11) being arranged on the back plate (1); A shoulder strap (2), one end of which is fixedly connected to the upper side of the back panel (1), and the other end of which is arranged on the front side of the back panel (1); Knee binding (3), provided below the back plate (1); The elastic energy storage mechanism (4) comprises an elastic band (41); the elastic band (41) is arranged between the back plate (1) and the knee binding (3); one end of the elastic band (41) is connected to the knee binding (3); the other end of the elastic band (41) is a movable end (411); the movable end (411) passes through the first connecting portion (11) and is slidably engaged with the first connecting portion (11); The adjustment mechanism (5) comprises an adjustment belt (51) with adjustable length, wherein one end of the adjustment belt (51) is fixedly connected to the shoulder belt (2), and the other end of the adjustment belt (51) is fixedly connected to the movable end (411) of the elastic belt (41).

2. The wearable passive power assist device with adjustable force according to claim 1, characterized in that: The first connection parts (11) are provided with two and are respectively located on both sides of the back plate (1) in the width direction; the second connection part (12) is provided at the center position of the back plate (1) in the width direction; the knee bindings (3) are provided with two and both have a third connection part (31); The elastic band (41) is arranged in a W shape, and both ends of the elastic band (41) are movable ends (411); the elastic band (41) further comprises an upper inflection point (412) and two lower inflection points (413) located between the two movable ends (411); the upper inflection point (412) is slidably connected to the second connection portion (12); the two lower inflection points (413) respectively correspond to the two third connection portions (31) and are slidably connected to the third connection portions (31); The adjustment mechanisms (5) are provided in two groups and are respectively located on both sides of the back plate (1) in the width direction, and are connected to the two movable ends (411) in a one-to-one correspondence.

3. The wearable passive power assist device with adjustable force according to claim 2, characterized in that: The adjustment belt (51) is arranged obliquely, and one end of the adjustment belt (51) connected to the shoulder belt (2) is located above the other end.

4. The wearable passive power assist device with adjustable force according to claim 1, characterized in that: The waist binding (6) further comprises a waist binding (6), wherein the waist binding (6) comprises a front waist belt (61) and a rear waist belt (62), wherein the rear waist belt (62) is arranged at a lower position of the back plate (1) and is fixedly connected to the back plate (1); the front waist belt (61) and the rear waist belt (62) are detachably connected; and the length of the front waist belt (61) is adjustable.

5. The wearable passive power assist device with adjustable force according to claim 4, characterized in that: The back plate (1) is also connected to a ventral strap (7), one end of the ventral strap (7) being fixedly connected to the upper portion of the back plate (1), and the other end of the ventral strap (7) being connected to the front waist belt (61).

6. The wearable passive power assist device with adjustable force according to claim 5, characterized in that: The adjustment mechanism (5) further comprises a guard plate, one end of which is fixedly connected to the back plate (1), and the other end of which extends to the front side of the back plate (1), and the adjustment belt (51) fits the guard plate; the guard plate is arranged in an arc shape so as to fit the human body.

7. The wearable passive power assist device with adjustable force according to claim 6, characterized in that: The ventral binding belt (7) and the adjustment belt (51) are arranged crosswise, and the guard plate is provided with a through hole for the ventral binding belt (7) to pass through.

8. The wearable passive power assist device with adjustable force according to claim 1, characterized in that: A shoulder support plate (13) is arranged above the back plate (1), and the shoulder support plate (13) is vertically slidably connected to the back plate (1) and is detachably arranged; The shoulder support plate (13) is also provided with a load-bearing belt (14), and the load-bearing belt (14) is connected with a hand hook (16) for hooking goods.

9. The wearable passive power assist device with adjustable force according to claim 8, characterized in that: The load-bearing belt (14) comprises a basic belt (141) and an additional belt (142); the basic belt (141) is elastic and fixedly connected to the shoulder support plate (13); the additional belt (142) is a non-elastic belt (41) and is folded, and the folded portion of the additional belt (142) is fixedly connected to the basic belt (141).

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