CN210543146U

CN210543146U - Upper limb auxiliary mechanical arm

Info

Publication number: CN210543146U
Application number: CN201920967879.5U
Authority: CN
Inventors: 杨期定; 汪圣
Original assignee: Ningbo Hongjian Intelligent Robot Co ltd
Current assignee: ZHEJIANG HONGJIAN REHABILITATION DEVELOPMENT CO.,LTD.
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-05-19
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to an upper limbs auxiliary machinery arm relates to medical instrument's technical field, has solved current sports physics rehabilitation and has divided into active and passive form, but no matter which kind of mode all needs the bare-handed operation of medical personnel with the help of medical instrument, not only requires the height on the high side to medical personnel's technique, and the problem of also consuming time and wasting power, it includes: the arm support component is used for placing the arm of the user to support the arm of the user; the support component is pivoted with the arm support component to support the arm support component; one end of the swinging component is rotatably connected with the supporting component so as to allow the arm of the user to swing; one end of the stepped shaft is rotatably connected with the other end of the swinging component and is used for supporting the swinging component. The utility model has the advantages of simple operation, not high to medical staff's technical requirement, need not medical staff even and operate, patient can independently take exercise the rehabilitation, has practiced thrift manpower resources's effect.

Description

Upper limb auxiliary mechanical arm

Technical Field

The utility model belongs to the technical field of medical instrument's technique and specifically relates to an upper limbs auxiliary machinery arm is related to.

Background

The senile people have high morbidity and disability probability due to physiological function decline, cerebrovascular diseases, osteoarthropathy, dementia and the like. China is in the aging process, and the proportion of the elderly population is continuously rising. With the aging, the flexibility of the limbs of the elderly is reduced, and a large number of patients with cardiovascular and cerebrovascular diseases or nervous system diseases exist in the elderly population, and most of the patients with hemiplegia suffer from upper limb dysfunction.

Clinical medicine and medical theory prove that correct, scientific and reasonable rehabilitation training of the patients plays an important role in recovering the upper limb movement function except for early-stage operation treatment and drug treatment. Exercise therapy is a main rehabilitation method and mainly solves the problems that muscles of patients are weak, and the patients cannot do, stand and walk.

Clinically, the existing physical exercise rehabilitation therapy is divided into an active type and a passive type, but in any mode, medical personnel need to operate by means of medical instruments in bare hands, the technical requirements on the medical personnel are high, time and labor are consumed, and the improvement space is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an upper limbs auxiliary machinery arm, easy operation, it is not high to medical staff's technical requirement, need not medical staff even and operate, patient can independently take exercise the rehabilitation, has practiced thrift manpower resources.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

an upper limb assist mechanical arm comprising:

the arm support component is used for placing the arm of the user to support the arm of the user;

the support component is pivoted with the arm support component to support the arm support component;

one end of the swinging component is rotatably connected with the supporting component so as to allow the arm of the user to swing;

one end of the stepped shaft is rotatably connected with the other end of the swinging component and is used for supporting the swinging component.

Through adopting above-mentioned technical scheme, arm structural design is reasonable, and weight is lighter, easy operation, and convenient to use can assist the upper limbs dysfunction patient to carry out the motion rehabilitation, and is not high to medical staff's technical requirement, need not medical staff even and operates, and patient can independently take exercise the rehabilitation, has practiced thrift manpower resources.

The utility model discloses further set up to: the swing assembly comprises a first connecting rod, one end of the first connecting rod is rotatably connected with the stepped shaft, and the other end of the first connecting rod is rotatably connected with the swing assembly.

Through adopting above-mentioned technical scheme, make arm support subassembly and supporting component can swing at the horizontal direction to supplementary upper limbs dysfunction patient carries out the motion rehabilitation, simple structure, the practicality is strong.

The utility model discloses further set up to: the swing assembly further comprises at least one second connecting rod, two adjacent second connecting rods are mutually connected in a rotating mode, one end of the first connecting rod is connected with the stepped shaft in a rotating mode, the other end of the first connecting rod is connected with one end of the second connecting rod in a rotating mode, and the second connecting rod far away from the first connecting rod is connected with the supporting assembly in a rotating mode.

Through adopting above-mentioned technical scheme, make arm support assembly and supporting component bigger at the hunting range of horizontal direction to make things convenient for upper limbs dysfunction patient to carry out the recovered of motion of wider range, improved the exercise effect when upper limbs dysfunction patient uses the arm.

The utility model discloses further set up to: the support assembly includes:

the supporting seat is rotatably connected with one end of the swinging assembly, which is far away from the stepped shaft;

one end of the support arm is connected with the support seat and the other end of the support arm is connected with the arm support component.

Through adopting above-mentioned technical scheme, support the arm and hold in the palm the subassembly, make the height of arm support and the highly adapted of user's arm to conveniently carry out the recovered training of motion.

The utility model discloses further set up to: the support assembly further comprises:

the lever arm is integrally arranged at one end of the support arm close to the support seat, and the support arm is rotatably connected with the support seat;

one end of the elastic piece is connected with one end of the lever arm far away from the support arm, and the other end of the elastic piece is connected with the adjusting rod;

the adjusting rod is arranged on one side of the supporting seat far away from the lever arm and penetrates through the other end of the elastic piece;

the supporting seat is provided with a through groove for the elastic piece to pass through, and one side of the supporting seat far away from the lever arm is provided with a plurality of adjusting grooves which are mutually communicated with the through groove and are used for clamping and embedding the adjusting rod to adjust the elasticity of the elastic piece.

Through adopting above-mentioned technical scheme, make the use height of arm support subassembly can adjust through adjusting the pole and different adjustment tank inlay card to the user who is applicable to different heights size uses, has improved the application scope of arm.

one end of the adjusting plate is connected with one end of the elastic piece, which is far away from the lever arm, and the other end of the adjusting plate penetrates through the penetrating groove;

the holding rod is arranged at one end of the adjusting plate, which is far away from the lever arm, and is used for holding by hands.

Through adopting above-mentioned technical scheme, the setting of holding the pole, the person of facilitating the use grips to pulling the elastic component, adjusting the regulating lever card and inlaying in the adjustment tank of difference, the efficiency of arm support subassembly altitude mixture control when having improved the arm use has improved the availability factor of arm.

The utility model discloses further set up to: the arm holds in palm the subassembly and includes:

a forearm support for placing the forearm of the user to support the forearm;

the big arm support is fixed on the forearm support, arranged on one side close to the supporting seat and used for placing the big arm of a user to support the big arm;

the supporting piece is fixed with the forearm support and the big arm support through screws and is arranged on the lower side of the forearm support to support the big arm support;

the step pin is fixed at one end of the support arm far away from the support seat through a screw, and a ring groove is formed in the step pin;

the hook is arranged on one side of the bearing piece close to the step pin and is hung on the annular groove of the step pin;

the elastic sheet is fixed on one side of the bearing piece close to the front arm support through screws and is suspended on the step pin, and a penetrating hole for the step pin to penetrate through is formed in the elastic sheet.

Through adopting above-mentioned technical scheme, the forearm holds in the palm and holds in the palm on the screw fixation in the support piece with big arm, the support piece is located the downside that the forearm held in the palm in order to support the forearm, the support piece is connected on the support arm through couple and shell fragment, the patient places the forearm on the forearm holds in the palm when using, big arm holds in the palm the butt with big arm, with the weight that self bore when reducing patient's motion and taking exercise, make things convenient for the patient to take exercise for a long time, the burden when having reduced patient's motion and taking exercise has improved the recovered effect of patient's motion and taking exercise.

The utility model discloses further set up to: the supporting piece is provided with a long waist hole for the screw to penetrate and slide.

Through adopting above-mentioned technical scheme, make the position that forearm held in the palm, big arm held in the palm can adjust through the slip in screw and long waist hole to be applicable to the patient of different sizes and use, improved the application scope of arm.

The utility model discloses further set up to: still including being used for the fixed subassembly of centre gripping, the fixed subassembly of centre gripping includes:

the clamping plate is fixedly connected with the stepped shaft;

the base plate is arranged on one side of the clamping plate, which is far away from the supporting seat, and is parallel to the clamping plate;

one end of the connecting plate is connected with the clamping plate, and the other end of the connecting plate is connected with the substrate so as to connect the clamping plate with the substrate;

the stud is connected to the base plate in a threaded mode and matched with the clamping plate to clamp the fixing surface;

the handle is arranged on one side of the stud, which is far away from the clamping plate, and is used for being held by a hand to rotate the stud;

and the bolt is fixed on one side of the stud close to the clamping plate.

Through adopting above-mentioned technical scheme, the user accessible grips the handle and orders about the double-screw bolt and rotate, makes fixing surfaces such as butt dish cooperation base plate clamping table to on being fixed in the desktop with the arm, widened the use scene of arm, it is more convenient to use.

The utility model discloses further set up to: the clamping plate is provided with a retracting suspension piece, the supporting piece is fixed with a suspension sleeve through a screw, and the suspension sleeve can be suspended on the retracting suspension piece.

Through adopting above-mentioned technical scheme, the arm can hang the cover that hangs when not using on packing up the flying piece to reduce the occupation space of arm, simple structure, reasonable in design, the practicality is strong.

To sum up, the utility model discloses a beneficial technological effect does:

1. the operation is simple, the technical requirements on medical personnel are not high, even the medical personnel are not required to operate, the patient can independently operate, and the human resources are saved;

2. the arm support assembly and the support assembly have larger swing range in the horizontal direction, so that the upper limb dysfunction patient can conveniently carry out larger range exercise rehabilitation, and the exercise effect of the upper limb dysfunction patient when using the mechanical arm is improved;

3. place the forearm on the forearm support during the use, big arm and big arm support butt to reduce the weight that self bore when patient's motion was taken exercise, reduced the burden when patient's motion was taken exercise, improved the recovered effect of patient's motion exercise.

Drawings

Fig. 1 is a schematic structural view of an upper limb exercise assisting apparatus of the present invention.

Fig. 2 is an exploded view of the first embodiment of the installation fixture by the clamping fixture assembly.

Fig. 3 is a schematic structural view of a second embodiment which swings only by the first link.

Fig. 4 is a schematic structural diagram of a third embodiment that swings via a first link and a second link.

FIG. 5 is a schematic structural view of a fourth embodiment of supporting by only supporting seat and arm.

FIG. 6 is a schematic structural diagram of a fifth embodiment supported by a supporting base, a supporting arm, an elastic member and an adjusting lever.

FIG. 7 is a schematic structural diagram of a sixth embodiment supported by a supporting base, a supporting arm, an elastic member, an adjusting lever and a holding plate.

FIG. 8 is a partial schematic view of the arm and arm rest assembly.

FIG. 9 is a partial exploded view of the arm and arm rest assembly.

FIG. 10 is a second partial exploded view of the arm and arm rest assembly.

Figure 11 is a schematic view of the arm rest assembly in use.

In the figure, 1, an arm support component; 11. a forearm support; 12. a big arm support; 13. a support member; 14. a step pin; 15. hooking; 141. a ring groove; 16. a spring plate; 161. perforating holes; 162. a deformation hole; 131. a long waist hole; 2. a support assembly; 21. a supporting seat; 22. a support arm; 23. a lever arm; 24. an elastic member; 25. adjusting a rod; 211. a groove is arranged in a penetrating way; 212. an adjustment groove; 26. an adjusting plate; 27. a holding rod; 3. a swing assembly; 31. a first link; 32. a second link; 4. a stepped shaft; 5. clamping and fixing the assembly; 51. a clamping plate; 52. a substrate; 53. a stud; 54. a handle; 55. a butting tray; 56. a connecting plate; 6. retracting the suspension part; 61. bending a rod; 62. a suspension ball; 7. and (5) hanging the sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1 to 11.

Referring to fig. 1, the upper limb auxiliary mechanical arm disclosed by the utility model comprises an arm support component 1, a support component 2, a swing component 3 and a stepped shaft 4; the stepped shaft 4 can be directly inserted into the left side and the right side of the wheelchair or the desktop so as to install and fix the auxiliary mechanical arm.

In one embodiment, referring to fig. 2, an upper limb assist robot further comprises a clamp holding assembly 5, the clamp holding assembly 5 being used for holding a tabletop to secure the assist robot to the tabletop; the clamping fixture assembly 5 includes a clamping plate 51, a base plate 52, a connecting plate 56, a stud 53, a handle 54, and an abutment plate 55.

The stepped shaft 4 is fixedly inserted on the clamping plate 51, the base plate 52 is arranged on the lower side of the clamping plate 51, the base plate 52 is parallel to the clamping plate 51, two ends of the connecting plate 56 are respectively and integrally connected with the clamping plate 51 and the base plate 52 so as to connect the clamping plate 51 with the base plate 52 together, the stud 53 is in threaded connection with the base plate 52, the abutting disc 55 is fixed at one end, close to the clamping plate 51, of the stud 53 through screws, and the abutting disc 55 is matched with the clamping plate 51 to clamp the desktop so as to fix the auxiliary mechanical arm on the desktop; the lower end of the stud 53 is also sleeved with a handle 54, the handle 54 is in interference fit with the stud 53, and the handle 54 is held by a hand, so that a user can conveniently rotate the stud 53 by hands without other tools; the auxiliary mechanical arm can also be installed and fixed through a clamping and fixing component 5.

The oscillating assembly 3 is shown in figures 3-4:

in one embodiment, referring to fig. 3, the swing assembly 3 includes a first link 31, one end of the first link 31 is rotatably connected to the stepped shaft 4 through a bearing, the other end of the first link 31 is rotatably connected to the support base 21, and the first link 31 swings in a horizontal direction.

In one embodiment, referring to fig. 4, the swing assembly 3 includes a first link 31 and at least one second link 32, one end of the first link 31 is rotatably connected to the stepped shaft 4 through a bearing, the other end of the first link 31 is rotatably connected to one second link 32, two adjacent second links 32 are rotatably connected to each other, one end of the second link 32 far away from the first link 31 is rotatably connected to one end of the adjacent second link 32 or the adjacent first link 31, the other end is rotatably connected to the support base 21, and the first link 31 and the second link 32 both swing on a horizontal plane.

The support assembly 2 is shown in fig. 5-7:

in one embodiment, referring to fig. 5, the support assembly 2 comprises a support base 21 and an arm 22; supporting seat 21 rotates with first connecting rod 31 or second connecting rod 32 and is connected, and the axis of rotation of supporting seat 21 is vertical setting, and support arm 22 passes through the fix with screw in the upper end of supporting seat 21 to support arm support subassembly 1, the use of arm support subassembly 1 highly can be adjusted after loosening the screw, and the screw of screwing after the regulation is accomplished is fixed.

In one embodiment, referring to fig. 6, the support assembly 2 comprises a support base 21, an arm 22, a lever arm 23, an elastic member 24, and an adjustment lever 25; the supporting seat 21 is rotatably connected with the first connecting rod 31 or the second connecting rod 32, the rotating axis of the supporting seat 21 is vertically arranged, the supporting arm 22 is rotatably connected to the upper end of the supporting seat 21 through a bearing, and the lever arm 23 is integrally arranged at one end of the supporting arm 22 close to the supporting seat 21; the elastic component 24 is preferably an extension spring, one end of the extension spring is connected with one end of the lever arm 23 far away from the supporting seat 21 through a screw, a through groove 211 is formed in the supporting seat 21, the through groove 211 runs through the supporting seat 21, the through groove 211 supplies the extension spring to pass through, the other end of the extension spring is penetrated through by the adjusting rod 25, the adjusting rod 25 is arranged on one side of the supporting seat 21 far away from the lever arm 23, one side of the lever arm 23 far away from the supporting seat 21 is provided with a plurality of adjusting grooves 212, the adjusting grooves 212 supply the adjusting rods 25 to be clamped and embedded, and.

In one embodiment, referring to fig. 7, the support assembly 2 includes a support base 21, a support arm 22, a lever arm 23, an elastic member 24, an adjustment lever 25, an adjustment plate 26, and a holding lever 27; the supporting seat 21 is rotatably connected with the first connecting rod 31 or the second connecting rod 32, the rotating axis of the supporting seat 21 is vertically arranged, the supporting arm 22 is rotatably connected to the upper end of the supporting seat 21 through a bearing, and the lever arm 23 is integrally arranged at one end of the supporting arm 22 close to the supporting seat 21; the elastic element 24 is preferably a tension spring, one end of the tension spring is connected with one end, far away from the support base 21, of the lever arm 23 through a screw, a through groove 211 is formed in the support base 21, the through groove 211 penetrates through the support base 21, the adjusting plate 26 penetrates through the through groove 211, one end of the adjusting plate 26 is connected with the other end of the tension spring through a screw, the adjusting rod 25 is inserted into the adjusting plate 26, the adjusting rod 25 is arranged on one side, far away from the lever arm 23, of the support base 21, a plurality of adjusting grooves 212 are formed in one side, far away from the lever arm 23, of the support base 21, and the adjusting grooves 212 are used for; the end of the adjusting plate 26 away from the tension spring is provided with a holding rod 27, and the holding rod 27 is held by hand to pull the adjusting plate 26 to adjust the use height of the arm support assembly 1.

Referring to fig. 8 and 9, the arm support assembly 1 is connected with one end of the support arm 22 far away from the lever arm 23, and the arm support assembly 1 comprises a front arm support 11, a large arm support 12, a support piece 13, a step pin 14 and an elastic sheet 16; the forearm support 11 is used for placing the forearm of a user so as to support the forearm of the user and reduce the bearing of the user during exercise; referring to fig. 7, the big arm support 12 is disposed on a side of the forearm support 11 close to the support base 21, and the big arm support 12 is used for placing the big arm of the user to support the big arm of the user; the forearm support 11 and the big arm support 12 are both fixed on a bearing piece 13 through screws, the bearing piece 13 is arranged at the lower side of the forearm support 11 to support the forearm support 11, and the bearing piece 13 can be arranged integrally or separately.

Referring to fig. 9 and 10, a long waist hole 131 is formed in one side of the support 13 away from the support arm 22, and the long waist hole 131 allows a screw to pass through and slide so as to adjust the positions of the forearm support 11 and the forearm support 12, thereby being suitable for users with different body types; the step pin 14 is connected with one end of the support arm 22 far away from the lever arm 23 through a screw, a ring groove 141 is formed in the step pin 14, and the ring groove 141 is located in the middle of the step pin 14; a hook 15 is integrally arranged on one side of the supporting piece 13 close to the support arm 22, the hook 15 is hung in the annular groove 141, an elastic sheet 16 is further fixed on one side of the supporting piece 13 close to the step pin 14 through a screw, a through hole 161 is formed in the elastic sheet 16, and the elastic sheet 16 is sleeved on the small-diameter end of the step pin 14 through the through hole 161; the elastic sheet 16 is further provided with a deformation hole 162 to weaken the structural strength of the elastic sheet 16 and facilitate the elastic deformation of the elastic sheet 16.

During installation, the hook 15 is first snapped into the annular groove 141, and then the through hole 161 is sleeved on the thin end of the step pin 14 through elastic deformation of the elastic piece 16, so as to rotatably connect the arm support assembly 1 to the end of the support arm 22 away from the lever arm 23.

Referring to fig. 1 and 2, a stowable suspension member 6 is further disposed on the clamping plate 51, the stowable suspension member 6 includes a curved rod 61 and a suspension ball 62, the curved rod 61 is welded, plugged or screwed on the clamping plate 51, the suspension ball 62 is disposed at an end of the curved rod 61 away from the clamping plate 51, and the suspension ball 62 is welded and screwed on the curved rod 61.

Referring to fig. 1 and 10, the supporting member 13 is further provided with a hanging sleeve 7, and when the auxiliary mechanical arm is not used, the hanging sleeve 7 can be hung on the hanging ball 62, so that the occupied space of the auxiliary mechanical arm is reduced.

Referring to fig. 1 and 11, when the user uses the forearm, the forearm is placed on the forearm support 11, the rear end of the forearm abuts against the forearm support 12, and the forearm is swung back and forth and left and right in the horizontal direction by the swing unit 3, or swung up and down in the vertical direction by the elastic deformation of the elastic member 24.

The implementation principle of the embodiment is as follows:

when the user uses the exercise rehabilitation forearm, the forearm is placed on the forearm support 11, and the rear end of the large arm is abutted against the large arm support 12, so that the self bearing of the user during exercise rehabilitation is reduced; the use height of the arm support assembly 1 can be adjusted by clamping and embedding the adjusting rod 25 with different adjusting grooves 212; the swinging component 3 is arranged, so that a user can swing back and forth, left and right to carry out all-directional movement; the auxiliary mechanical arm can be inserted on the left side and the right side of the wheelchair or the desktop through the stepped shaft 4, and can be clamped and fixed on the desktop through the clamping and fixing component 5, so that the wheelchair is convenient to use.

The utility model discloses an arm can also be used for increasing the stability of arm except can being used for the patient to carry out the rehabilitation training to supplementary life and work can also protect fitness personnel's outer arm skeleton, make fitness personnel's outer wall skeleton be difficult for pulling when the body-building.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An upper limb auxiliary mechanical arm is characterized in that: the method comprises the following steps:

the arm support component (1) is used for placing the arm of a user to support the arm of the user;

the support component (2) is pivoted with the arm support component (1) to support the arm support component (1);

one end of the swinging component (3) is rotatably connected with the supporting component (2) so as to allow the arm of the user to swing;

one end of the stepped shaft (4) is rotatably connected with the other end of the swinging component (3) and is used for supporting the swinging component (3).

2. The upper limb auxiliary mechanical arm according to claim 1, wherein: the swing assembly (3) comprises a first connecting rod (31) with one end rotatably connected with the stepped shaft (4) and the other end rotatably connected with the swing assembly (3).

3. The upper limb assist mechanical arm as claimed in claim 2, wherein: the swing assembly (3) further comprises at least one second connecting rod (32), the two adjacent second connecting rods (32) are mutually connected in a rotating mode, one end of the first connecting rod (31) is connected with the stepped shaft (4) in a rotating mode, the other end of the first connecting rod is connected with one end of the second connecting rod (32) in a rotating mode, and the second connecting rod (32) far away from the first connecting rod (31) is connected with the supporting assembly (2) in a rotating mode.

4. The upper limb auxiliary mechanical arm according to claim 1, wherein: the support assembly (2) comprises:

the supporting seat (21) is rotatably connected with one end, far away from the stepped shaft (4), of the swinging assembly (3);

one end of the support arm (22) is connected with the support base (21) and the other end is connected with the arm support component (1).

5. The upper limb auxiliary mechanical arm according to claim 4, wherein: the support assembly (2) further comprises:

the lever arm (23) is integrally arranged at one end, close to the supporting seat (21), of the supporting arm (22), and the supporting arm (22) is rotatably connected with the supporting seat (21);

one end of the elastic piece (24) is connected with one end of the lever arm (23) far away from the support arm (22), and the other end is connected with the adjusting rod (25);

the adjusting rod (25) is arranged on one side, away from the lever arm (23), of the supporting seat (21) and penetrates through the other end of the elastic piece (24);

the supporting seat (21) is provided with a penetrating groove (211) for the elastic piece (24) to pass through, and one side of the supporting seat (21) far away from the lever arm (23) is provided with a plurality of adjusting grooves (212) which are mutually communicated with the penetrating groove (211) and are used for clamping and embedding the adjusting rod (25) to adjust the elasticity of the elastic piece (24).

6. The upper limb assist mechanical arm as claimed in claim 5, wherein: the support assembly (2) further comprises:

one end of the adjusting plate (26) is connected with one end of the elastic piece (24) far away from the lever arm (23), and the other end of the adjusting plate penetrates through the penetrating groove (211), and the adjusting rod (25) is inserted into one side, far away from the lever arm (23), of the adjusting plate (26);

and the holding rod (27) is arranged at one end of the adjusting plate (26) far away from the lever arm (23) and is used for holding by hands.

7. The upper limb auxiliary mechanical arm according to claim 4, wherein: the arm rest assembly (1) comprises:

a forearm support (11) for placing the forearm of the user to support the forearm;

the big arm support (12) is fixed on the forearm support (11), arranged on one side close to the support seat (21) and used for placing the big arm of a user to support the big arm;

the supporting piece (13) is fixed with the forearm support (11) and the big arm support (12) through screws and is arranged at the lower side of the forearm support (11) to support the big arm support (12);

the step pin (14) is fixed at one end, far away from the supporting seat (21), of the supporting arm (22) through a screw, and a ring groove (141) is formed in the step pin (14);

the hook (15) is arranged on one side of the bearing piece (13) close to the step pin (14) and is hung on the annular groove (141) of the step pin (14);

the elastic sheet (16) is fixed on one side, close to the front arm support (11), of the support piece (13) through screws and is hung on the step pin (14), and a penetrating hole (161) for the step pin (14) to penetrate through is formed in the elastic sheet (16).

8. The upper limb assist mechanical arm as claimed in claim 7, wherein: the supporting piece (13) is provided with a long waist hole (131) for the screw to penetrate and slide.

9. The upper limb assist mechanical arm as claimed in claim 7, wherein: still including the fixed subassembly of centre gripping (5) that is used for the centre gripping fixed, the fixed subassembly of centre gripping (5) includes:

a clamping plate (51) fixedly connected with the stepped shaft (4);

the substrate (52) is arranged on one side of the clamping plate (51) far away from the supporting seat (21) and is parallel to the clamping plate (51);

a connecting plate (56) having one end connected to the holding plate (51) and the other end connected to the substrate (52) to connect the holding plate (51) and the substrate (52);

a stud (53) which is screwed on the base plate (52) to match with the clamping plate (51) to clamp the fixing surface;

the handle (54) is arranged on one side of the stud (53) far away from the clamping plate (51) and is used for being held by a hand to rotate the stud (53);

and the abutting disc (55) is fixed on one side of the stud (53) close to the clamping plate (51) by screws.

10. The upper limb assist mechanical arm as claimed in claim 9, wherein: a retractable suspension piece (6) is arranged on the clamping plate (51), a suspension sleeve (7) is fixed on the supporting piece (13) through a screw, and the suspension sleeve (7) can be suspended on the retractable suspension piece (6).