Artificial hand thumb with passive joint

Abstract

The utility model relates to the technical field of artificial limbs, in particular to an artificial hand thumb with a passive joint, which comprises a positioning frame arranged in a protective plate, an artificial hand thumb and a fixed thumb arranged in the positioning frame, a bottom plate arranged on the side surface of the protective plate, a small motor arranged on the surface of the bottom plate, a gear sleeved on the surface of a rotating rod, and a bracket arranged on the surface of the positioning frame, a vertical rod is arranged in the support, and a positioning toothed plate is arranged at one end of the vertical rod. The device has the beneficial effects that when an object needs to be carried by two hands during use, a positioning toothed plate is pulled upwards firstly, then a small motor can be started through a main controller, an artificial hand thumb is matched with a fixed thumb to clamp the object, and then the positioning toothed plate is loosened to limit and lock a gear; therefore, the artificial hand thumb and the fixed thumb can be fixed, and then the artificial hand can be matched with the other healthy hand of a user to carry objects conveniently.

Description

Technical Field

[0001] The utility model relates to the field of artificial limbs, in particular to an artificial thumb with a passive joint. Background Art

[0002] Hands are the most complex and sophisticated tools for human survival and labor. Humans can use their hands to contact the external environment and obtain information from the environment, so as to better operate the environment. As an important content and component of rehabilitation medicine engineering, artificial hands are an important means for the disabled to recover and return to society.

[0003] In the prior art, in order to facilitate the normal life of the disabled, a prosthetic thumb is installed, and the prosthetic thumb can be used to facilitate the user to pick up objects and facilitate life.

[0004] However, the traditional prosthetic thumb lacks a locking structure when picking up objects. When using the prosthetic thumb to pick up objects, the driving device may loosen and the object may fall off. Therefore, the present utility model proposes a prosthetic thumb with a passive joint to solve the above-mentioned problem. Utility Model Content

[0005] The purpose of the utility model is to provide a prosthetic thumb with a passive joint to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a prosthetic thumb with a passive joint, the prosthetic thumb with a passive joint comprising: a guard plate, a positioning frame is arranged in the guard plate, a prosthetic thumb and a fixed thumb are arranged in the positioning frame, a bottom plate is arranged on the side of the guard plate, a small motor is arranged on the surface of the bottom plate, and the small motor is controlled by a main controller;

[0007] A rotating rod is provided with a gear on its surface, a bracket is provided on the surface of the positioning frame, a vertical rod is provided in the bracket, and a positioning tooth plate is provided at one end of the vertical rod.

[0008] Preferably, an elastic plate is provided at the bottom of the guard plate, and two groups of elastic plates are provided. The two groups of elastic plates are symmetrically distributed about the guard plate, one group of elastic plates is provided with a Velcro fur surface on the end face, and the other group of elastic plates is provided with a Velcro flat surface on the end face, and a protective shell is provided on the side of the guard plate, which can cover the side of the guard plate.

[0009] Preferably, the bottom plate is fixedly connected to the side of the guard plate, the small motor is fixedly connected to the surface of the bottom plate, and the transmission end of the small motor is sleeved with a bevel gear.

[0010] Preferably, a bearing is provided in the positioning frame, a rotating rod is fixedly connected to the inner ring surface of the bearing, the thumb of the artificial hand is fixed to the surface of the rotating rod, a traction wheel and a second bevel gear are sleeved on the surface of the rotating rod, and the bevel gear and the second bevel gear are meshed with each other for transmission.

[0011] Preferably, a second bearing is provided on the side of the positioning frame, a support rod is fixedly connected to the inner ring surface of the second bearing, a traction wheel is also sleeved on the surface of the support rod, and two sets of traction wheels are driven by a transmission belt.

[0012] Preferably, the bracket is fixedly connected to the surface of the positioning frame, the vertical rod can be pulled up and down in the bracket, a spring is sleeved on the surface of the vertical rod, one end of the spring is fixedly connected to the surface of the positioning tooth plate, and the other end of the spring is fixedly connected to the lower surface of the bracket.

[0013] Preferably, a power supply module is provided in the guard plate, and the power supply module can provide power to the main controller and the small motor. A pressure sensing module is provided in the prosthetic thumb, and the main controller is electrically connected to the pressure sensing module.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The artificial hand thumb with a passive joint proposed by the utility model, when it is needed to use two hands to carry an object, firstly the positioning tooth plate is pulled upwards, then the small motor can be started by the main controller, so that the artificial hand thumb cooperates with the fixed thumb to clamp the object, and then the positioning tooth plate is released to limit and lock the gear on the positioning tooth plate, so that the artificial hand thumb and the fixed thumb can be fixed, and then the object can be carried more conveniently by cooperating with the user's other healthy hand, thus avoiding the problem that the traditional artificial hand thumb lacks a locking structure when picking up an object, which may cause the driving device to loosen and easily cause the picked-up object to fall off when the artificial hand thumb is used to pick up the object. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the back structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model after the protective shell is removed;

[0019] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0020] Figure 5 This is a side view of the structure of the utility model;

[0021] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0022] Figure 7 This is a structural control flow chart of the utility model.

[0023] In the figure: 1. guard plate; 2. positioning frame; 3. prosthetic thumb; 4. fixed thumb; 5. bottom plate; 6. small motor; 7. rotating rod; 8. gear; 9. bracket; 10. vertical pole; 11. positioning tooth plate; 12. elastic plate; 13. Velcro fur surface; 14. Velcro flat surface; 15. bevel gear; 16. bearing; 17. traction wheel; 18. second bevel gear; 19. second bearing; 20. support rod; 21. transmission belt; 22. spring; 23. main controller; 24. power supply module; 25. pressure sensing module; 26. protective shell. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] See also Figure 1-Figure 7 The utility model provides a technical solution: a prosthetic thumb with a passive joint, the prosthetic thumb with a passive joint comprises: a guard plate 1, a positioning frame 2 is arranged in the guard plate 1, a prosthetic thumb 3 and a fixed thumb 4 are arranged in the positioning frame 2, a bottom plate 5 is arranged on the side of the guard plate 1, a small motor 6 is arranged on the surface of the bottom plate 5, and the small motor 6 is controlled by a main controller 23; a rotating rod 7, a gear 8 is sleeved on the surface of the rotating rod 7, a bracket 9 is arranged on the surface of the positioning frame 2, a vertical rod 10 is arranged in the bracket 9, and a positioning tooth plate 11 is arranged at one end of the vertical rod 10;

[0027] When it is necessary to use both hands to carry an object, first pull the positioning tooth plate 11 upwards, then use the main controller 23 to start the small motor 6, so that the prosthetic thumb 3 cooperates with the fixed thumb 4 to clamp the object, and then release the positioning tooth plate 11 to limit and lock the gear 8, so that the prosthetic thumb 3 and the fixed thumb 4 can be fixed, and then the object can be carried more conveniently with the user's other healthy hand.

[0028] Embodiment 2

[0029] On the basis of the first embodiment, in order to facilitate the use of the artificial hand thumb 3 to carry objects, a main controller 23 is provided, the bottom plate 5 is fixedly connected to the side of the guard plate 1, the small motor 6 is fixedly connected to the surface of the bottom plate 5, the transmission end of the small motor 6 is sleeved with a bevel gear 15, a bearing 16 is provided in the positioning frame 2, the rotating rod 7 is fixedly connected to the inner ring surface of the bearing 16, the artificial hand thumb 3 is fixed to the surface of the rotating rod 7, the surface of the rotating rod 7 is sleeved with a traction wheel 17 and a second bevel gear 18, the bevel gear 15 and the second bevel gear 18 are meshed with each other for transmission, a second bearing 19 is provided on the side of the positioning frame 2, a support rod 20 is fixedly connected to the inner ring surface of the second bearing 19, and the surface of the support rod 20 is also sleeved with a traction wheel 17, and the two groups of traction wheels 17 are belt-driven by a transmission belt 21, the bracket 9 is fixedly connected to the surface of the positioning frame 2, the vertical pole 10 can be pulled up and down in the bracket 9, and the surface of the vertical pole 10 is sleeved with a spring 22, one end of the spring 22 is fixedly connected to the surface of the positioning tooth plate 11, and the other end of the spring 22 is fixedly connected to the lower surface of the bracket 9;

[0030] When in use, the main controller 23 can be used to drive the small motor 6 to make the bevel gear 15 cooperate with the setting of the second bevel gear 18 to rotate the rotating rod 7, so that the artificial hand thumb 3 set on the surface of the rotating rod 7 can cooperate with the fixed thumb 4 to close and clamp, and the transmission belt 21 can cooperate with the traction wheel 17 to play a tensioning role on the rotating rod 7 and the bearing 16 after cooperation, so as to avoid the problem of rotational looseness of the rotating rod 7. The setting of the spring 22 can facilitate the reset by the elastic force of the spring 22 after pulling the positioning tooth plate 11, and also avoid the problem of the positioning tooth plate 11 being separated after locking the gear 8.

[0031] Embodiment 3

[0032] On the basis of the second embodiment, in order to improve the use of the prosthetic thumb 3, a pressure sensing module 25 is provided, an elastic plate 12 is provided at the bottom of the guard plate 1, and two groups of elastic plates 12 are provided, and the two groups of elastic plates 12 are symmetrically distributed about the guard plate 1, and the end surface of one group of elastic plates 12 is provided with a Velcro fur surface 13, and the end surface of the other group of elastic plates 12 is provided with a Velcro plane 14, and a protective shell 26 is provided on the side of the guard plate 1, and the protective shell 26 can cover the side of the guard plate 1, and a power supply module 24 is provided in the guard plate 1, and the power supply module 24 can provide power to the main controller 23 and the small motor 6, and a pressure sensing module 25 is provided in the prosthetic thumb 3, and the main controller 23 is electrically connected to the pressure sensing module 25;

[0033] When in use, the elastic plate 12 can be used in conjunction with the Velcro fur surface 13 and the Velcro flat surface 14 to conveniently fix the guard plate 1 on the user's arm. When the prosthetic thumb 3 and the fixed thumb 4 are clamped, the pressure sensing module 25 can send a signal to the main controller 23 to stop driving the small motor 6 to rotate when it detects that the clamping force is sufficient. The positioning gear plate 11 can lock the gear 8 to a certain extent.

[0034] In actual use, when it is necessary to use both hands to carry an object, first pull the positioning tooth plate 11 upwards, then use the main controller 23 to start the small motor 6, so that the prosthetic thumb 3 cooperates with the fixed thumb 4 to clamp the object, and then release the positioning tooth plate 11 to limit and lock the gear 8, so that the prosthetic thumb 3 and the fixed thumb 4 can be fixed, and then the object can be carried more conveniently with the user's other healthy hand. This avoids the problem that the traditional prosthetic thumb 3 lacks a locking structure when picking up an object, which may cause the drive device to loosen and easily cause the object to fall off when the prosthetic thumb 3 is used to pick up the object.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prosthetic thumb with a passive joint, characterized in that: The artificial thumb with a passive joint comprises: a guard plate (1), a positioning frame (2) is arranged in the guard plate (1), a artificial thumb (3) and a fixed thumb (4) are arranged in the positioning frame (2), a bottom plate (5) is arranged on the side of the guard plate (1), a small motor (6) is arranged on the surface of the bottom plate (5), and the small motor (6) is controlled by a main controller (23); A rotating rod (7) is provided with a gear (8) on its surface, a bracket (9) is provided on the surface of the positioning frame (2), a vertical rod (10) is provided in the bracket (9), and a positioning tooth plate (11) is provided at one end of the vertical rod (10).

2. The artificial thumb with passive joint according to claim 1, characterized in that: The bottom of the guard plate (1) is provided with an elastic plate (12), and two groups of elastic plates (12) are provided. The two groups of elastic plates (12) are symmetrically distributed with respect to the guard plate (1), and the end surface of one group of elastic plates (12) is provided with a Velcro fleece surface (13), and the end surface of the other group of elastic plates (12) is provided with a Velcro flat surface (14). A protective shell (26) is provided on the side of the guard plate (1), and the protective shell (26) can cover the side of the guard plate (1).

3. The artificial thumb with passive joint according to claim 1, characterized in that: The bottom plate (5) is fixedly connected to the side of the guard plate (1), the small motor (6) is fixedly connected to the surface of the bottom plate (5), and the transmission end of the small motor (6) is sleeved with a bevel gear (15).

4. The artificial thumb with passive joint according to claim 1, characterized in that: A bearing (16) is arranged in the positioning frame (2), the rotating rod (7) is fixedly connected to the inner ring surface of the bearing (16), the artificial thumb (3) is fixed to the surface of the rotating rod (7), a traction wheel (17) and a second bevel gear (18) are sleeved on the surface of the rotating rod (7), and the bevel gear (15) and the second bevel gear (18) are meshed with each other for transmission.

5. The artificial thumb with passive joint according to claim 1, characterized in that: A second bearing (19) is arranged on the side of the positioning frame (2), and a support rod (20) is fixedly connected to the inner ring surface of the second bearing (19). A traction wheel (17) is also sleeved on the surface of the support rod (20), and the two sets of traction wheels (17) are driven by a transmission belt (21).

6. The artificial thumb with passive joint according to claim 1, characterized in that: The bracket (9) is fixedly connected to the surface of the positioning frame (2), the vertical rod (10) can be pulled up and down in the bracket (9), and a spring (22) is sleeved on the surface of the vertical rod (10), one end of the spring (22) is fixedly connected to the surface of the positioning tooth plate (11), and the other end of the spring (22) is fixedly connected to the lower surface of the bracket (9).

7. The artificial thumb with passive joint according to claim 1, characterized in that: A power supply module (24) is arranged in the guard plate (1), and the power supply module (24) can provide power to the main controller (23) and the small motor (6). A pressure sensing module (25) is arranged in the prosthetic thumb (3), and the main controller (23) is electrically connected to the pressure sensing module (25).

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