Bionic hand convenient to assemble

Abstract

The bionic hand convenient to assemble is suitable for the field of bionic hand development and comprises a palm and fingers connected with the palm through finger roots, the palm comprises a shell and power arranged in the shell, the fingers comprise the thumb and the index finger, the power is connected with the index finger through a main connecting rod, and the thumb is connected with the index finger through a main connecting rod. The index finger is connected with the thumb through the auxiliary connecting rod; according to the passive self-locking bionic hand, the bionic hand which is in a holding and lifting state for a long time can be in a power-off keeping state, passive self-locking is achieved, electric energy is saved, the endurance of a motor is greatly prolonged, the service life of the motor is prolonged, the structure is simple, the design is novel, through structural improvement, the performance of the bionic hand is greatly improved, assembling is convenient, maintenance is facilitated, and popularization is easy. The cost is reduced, the practicability is also greatly improved, and a dominant position is occupied in fierce market competition.

Description

Technical Field

[0001] The utility model relates to the development field of bionic hands, in particular to a bionic hand that is convenient for assembly. Background Art

[0002] The bionic hand has the function of imitating the movements of the human hand, can meet the daily needs of upper limb disabled people in work and life like the human hand, and can also provide fine terminal operation tools for scenarios such as industry and service, be used for special operations, and can replace the human hand to enter dangerous environments such as flammable, explosive, highly toxic, and radioactive to complete fine operations.

[0003] With the continuous improvement of living standards, the research on bionic hands has become more and more in-depth, and the functions have also become more and more. However, with the continuous increase of functions, the structure will become clumsy and complex, not convenient for assembly, maintenance and repair, and there is a need for improvement. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a bionic hand that is convenient for assembly, has a simple structure, is convenient for assembly, maintenance and repair, and has a power-off holding function.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The utility model includes a palm and fingers connected to the palm through finger roots. The palm includes a housing and power provided inside the housing. The fingers include a thumb and an index finger. The power is connected to the index finger through a main link, and the index finger is connected to the thumb through a sub-link.

[0007] Further, the output shaft of the power is connected to the main link through a winch. A central hole is provided on the winch. A fixing hole is provided on one side of the central hole, and a limiting hole corresponding to the fixing hole is provided on the other side of the central hole. A limiting block is fixedly provided on the limiting hole. A connection hole is provided at the end of the main link. One connection hole is correspondingly connected to the fixing hole on the winch, and the other connection hole is correspondingly connected to a round hole provided on the index finger.

[0008] Further, there are two sub-links, symmetrically arranged on both sides of the main link. First connection holes and second connection holes are provided at the ends of the sub-links. The first connection hole corresponds to a hole provided on the thumb, and the second connection hole corresponds to a hole provided on the index finger.

[0009] Further, the fingers further include a middle finger, and the middle finger is plugged together with the index finger through a plug.

[0010] Further, a through hole is provided at the center of the plug, and the index finger and the middle finger are correspondingly connected to the second through hole provided on the housing through the through hole, and the first through hole provided on the housing is correspondingly connected to the third through hole on the thumb.

[0011] Further, the cross section of the plug is a ring, and bumps and pits are evenly distributed on the ring. The pits on the index finger correspond to the bumps on the middle finger, and the bumps on the index finger correspond to the pits on the middle finger.

[0012] Further, the shapes and numbers of the bumps and pits are the same.

[0013] Further, an unlocking button movably connected to the housing is provided below the main connecting rod.

[0014] Further, a long hole is provided on the unlocking button, and the housing is connected to the unlocking button through the long hole.

[0015] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0016] The structure of the present utility model is simple and novel. Through the improvement of the structure, the performance of the bionic hand is greatly improved, which is convenient for assembly and conducive to maintenance and repair. It not only reduces the cost, but also greatly improves the practicability, occupying an advantageous position in the fierce market competition.

[0017] The bionic hand has the function of power-off holding. During the process of the index finger and the thumb approaching each other continuously when clamping small objects, after the main connecting rod rotates past the center point, the index finger and the thumb for clamping small objects are in a self-locking state, which can make the bionic hand in a power-off holding state for a long time in the pinching and lifting state, realizing self-locking without power supply, which is beneficial to saving electric energy, eliminating electric energy consumption, greatly increasing the battery life of the motor, and prolonging the service life of the motor.

[0018] The index finger and the middle finger are connected in a plug-in manner through the plug. The cross section is provided with corresponding convex and concave parts, and the connection is firm and reliable, which is convenient for the simultaneous movement of the index finger and the middle finger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is an internal structural schematic diagram of the present utility model in the open state;

[0021] Figure 3 is an internal structural schematic diagram of the present utility model in the pinched state;

[0022] Figure 4 is a structural schematic diagram of the plug of the present utility model;

[0023] Figure 5It is a schematic side view structure diagram of the open state of the utility model.

[0024] Among them, 1. Thumb; 1-1. Third through hole; 2. Sub-link; 2-1. First connection hole; 2-2. Second connection hole; 3. Main link; 3-1. Connection hole; 4. Winch; 4-1. Central hole; 4-2. Limit hole; 4-3. Fixing hole; 5. Housing; 5-1. First through hole; 5-2. Second through hole; 6. Index finger; 6-1. Round hole; 7. Middle finger; 8. Plug; 8-1. Protrusion; 8-2. Pit; 8-3. Through hole; 9. Unlock button; 9-1. Long hole. Specific embodiments

[0025] The following further describes the present utility model in detail with reference to embodiments:

[0026] A bionic hand convenient for assembly, as Figures 1-5 shown, which includes a palm and fingers connected to the palm through finger roots. The palm includes a housing 5 and power arranged inside the housing 5. The fingers include a thumb 1 and an index finger 6. The power is connected to the index finger 6 through a main link 3, and the index finger 6 is connected to the thumb 1 through a sub-link 2. The power is connected to one end of the main link 3 through a winch 4 on the output shaft. The other end of the main link 3 is connected to the index finger 6. The power drives the index finger 6 to move through the main link 3, and the index finger 6 drives the thumb 1 to move through the sub-link 2. In this way, under the action of the power, the index finger 6 and the thumb 1 move coordinately at the same time. During the extension and retraction of the fingers, the index finger 6 and the thumb 1 are unfolded or clamped to complete the functions of pinching and lifting objects.

[0027] As Figure 2 and Figure 3 shown, the output shaft of the power is connected to the main link 3 through a winch 4. A central hole 4-1 is opened on the winch 4. A fixing hole 4-3 is opened on one side of the central hole 4-1, and a limit hole 4-2 corresponding to the fixing hole 4-3 is arranged on the other side of the central hole 4-1. A limit block for limiting is fixedly arranged on the limit hole 4-2.

[0028] The central hole 4-1 is connected to the output shaft of the power. A connection hole 3-1 is opened at the end of the main link 3. One end of the main link 3 is correspondingly connected to the fixing hole 4-3 on the winch 4 through the connection hole 3-1, and the other end of the main link 3 is correspondingly connected to the round hole 6-1 opened on the index finger 6 through the connection hole 3-1. The output shaft of the power drives the winch 4 to rotate, and the fixing hole 4-3 on the winch 4 rotates accordingly. The main link 3 connected to the fixing hole 4-3 drives the index finger 6 to rotate.

[0029] There are two secondary connecting rods 2, which are symmetrically arranged on both sides of the main connecting rod 3. The ends of the secondary connecting rods 2 are provided with a first connecting hole 2-1 and a second connecting hole 2-2. The first connecting hole 2-1 is connected to the hole opened on the thumb 1, and the second connecting hole 2-2 is connected to the hole opened on the index finger 6. The index finger 6 and the thumb 1 are connected together through the secondary connecting rods 2 on both sides of the index finger 6. The output shaft of the power rotates to drive the capstan 4 connected thereto to rotate, and the capstan 4 rotates the fixing hole 4-3 and the main connecting rod 3 accordingly, and the index finger 6 connected to the main connecting rod 3 moves accordingly, and the movement of the index finger 6 drives the thumb 1 to move through the secondary connecting rod 2. Under the action of the power, the index finger 6 and the thumb 1 move simultaneously to smoothly realize the finger spreading and clamping movements.

[0030] like Figure 2 As shown, when it is necessary to clamp an object, the power rotates counterclockwise to drive the main connecting rod 3 to move upward and outward. While the main connecting rod 3 rotates upward and outward, it drives the index finger 6 to move inward. The index finger 6 drives the thumb 1 to move inward through the secondary connecting rod 2, until the index finger 6 and the thumb 1 are close to each other to grasp the object. When the clamped object is very small, the index finger 6 and the thumb 1 will continue to move closer and closer. When the index finger 6 and the thumb 1 are clamped together, the fixing hole 4-3 jumps over the center line of the capstan 4. At this time, the connecting hole 3-1 connected to the fixing hole 4-3 also jumps over the center line of the capstan 4. The main connecting rod 3 will rotate downward and inward, and the limit hole 4-2 will just turn to the bottom of the main connecting rod 3. Figure 3 The position shown in the figure, at this time, the limit block on the limit hole 4-2 blocks the main connecting rod 3 from moving downward. At this time, even if the power continues to rotate counterclockwise, the main connecting rod 3 will not move downward, and the main connecting rod 3 cannot be moved downward by applying external force, that is, the main connecting rod 3 is self-locking after being clamped to the extreme. At this time, the power is disconnected and the fingers cannot be pried open. The more the fixing hole 4-3 is pried, the more it moves downward and the tighter it is locked. Therefore, when the user needs to clamp or lift heavy objects for a long time, the power can be turned off to extend the battery life.

[0031] When the fingers in the self-locking state need to be unfolded, it is only necessary to rotate the power in the opposite direction or apply an external force to the main connecting rod 3 in the opposite direction when the power is off to make the main connecting rod 3 move upward. Figure 2 and Figure 3 As shown, an unlocking button 9 movably connected to the housing 5 is provided below the main connecting rod 3, and a long hole 9-1 is provided on the unlocking button 9, through which the housing 5 is connected to the unlocking button 9. When external force is applied to the unlocking button 9, the long hole 9-1 drives the unlocking button 9 to push the main connecting rod 3 upward along the housing 5 to drive the fixing hole 4-3 to retreat above the center line of the capstan 4, thereby achieving the purpose of unlocking.

[0032] like Figure 1 As shown, the fingers also include a middle finger 7, and the middle finger 7 is plugged together with the index finger 6 through a plug 8. Figure 4 andFigure 5 As shown, a through hole 8-3 is provided at the center of the plug 8. The index finger 6 and the middle finger 7 are correspondingly connected through the through hole 8-3 and the second through hole 5-2 provided on the housing 5. A rotating shaft passing through the through hole 8-3 and the second through hole 5-2 connects the index finger 6, the middle finger 7 and the housing 5 together. The first through hole 5-1 provided on the housing 5 is correspondingly connected to the third through hole 1-1 on the thumb 1. A rotating shaft passing through the first through hole 5-1 and the third through hole 1-1 connects the housing 5 and the thumb 1 together.

[0033] The cross-section of the plug 8 is a ring. Protrusions 8-1 and pits 8-2 are evenly distributed on the ring. The pits 8-2 on the index finger 6 correspond to the protrusions 8-1 on the middle finger 7, and the protrusions 8-1 on the index finger 6 correspond to the pits 8-2 on the middle finger 7. The shapes and numbers of the protrusions 8-1 and the pits 8-2 are the same. The connection is convenient, realizing a firm and reliable connection between the index finger 6 and the middle finger 7, ensuring that the index finger 6 and the middle finger 7 move synchronously and are not easily separated, with fast assembly and good practicability.

[0034] When the user needs to use the ring finger and the little finger, similarly, the index finger 6 and the middle finger 7, the middle finger 7 and the ring finger, and the ring finger and the little finger can all be plugged together with the plug 8.

[0035] Finally, it should be noted that the above embodiments are only examples for clearly illustrating the present invention and are by no means limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to enumerate all the implementation manners here, and the obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A bionic hand facilitating assembly, comprising a palm and fingers connected to the palm through finger roots, characterized in that: The palm includes a housing (5) and a power source disposed within the housing (5). The fingers include a thumb (1) and an index finger (6). The power source is connected to the index finger (6) through a main link (3), and the index finger (6) is connected to the thumb (1) through a secondary link (2).

2. The bionic hand according to claim 1, which is convenient for assembly, is characterized in that: The output shaft of the power source is connected to the main link (3) through a winch (4). The winch (4) is provided with a central hole (4-1). A fixing hole (4-3) is provided on one side of the central hole (4-1), and a limiting hole (4-2) is provided at the position corresponding to the fixing hole (4-3) on the other side of the central hole (4-1). A limiting block is fixedly provided on the limiting hole (4-2). A connecting hole (3-1) is provided at the end of the main link (3). The connecting hole (3-1) at one end is correspondingly connected to the fixing hole (4-3) on the winch (4), and the connecting hole (3-1) at the other end is correspondingly connected to a circular hole (6-1) provided on the index finger (6).

3. The bionic hand according to claim 1, which is convenient for assembly, is characterized in that: There are two secondary links (2), symmetrically arranged on both sides of the main link (3). First connecting holes (2-1) and second connecting holes (2-2) are provided at the ends of the secondary links (2). The first connecting holes (2-1) correspond to the holes provided on the thumb (1), and the second connecting holes (2-2) correspond to the holes provided on the index finger (6).

4. The bionic hand according to claim 1, characterized in that: The fingers further include a middle finger (7), and the middle finger (7) is plugged together with the index finger (6) through a plug (8).

5. The bionic hand according to claim 4, characterized in that: A through hole (8-3) is provided at the center of the plug (8). The index finger (6) and the middle finger (7) are correspondingly connected to a second through hole (5-2) provided on the housing (5) through the through hole (8-3). A first through hole (5-1) provided on the housing (5) is correspondingly connected to a third through hole (1-1) provided on the thumb (1).

6. The bionic hand according to claim 5, characterized in that: The cross-section of the plug (8) is a ring. Protrusions (8-1) and depressions (8-2) are evenly distributed on the ring. The depressions (8-2) on the index finger (6) correspond to the protrusions (8-1) on the middle finger (7), and the protrusions (8-1) on the index finger (6) correspond to the depressions (8-2) on the middle finger (7).

7. The bionic hand according to claim 6, characterized in that: The shapes and numbers of the protrusions (8-1) and the depressions (8-2) are the same.

8. The bionic hand facilitating assembly according to any one of claims 1-7, characterized in that: An unlocking button (9) movably connected to the housing (5) is provided below the main link (3).

9. The bionic hand according to claim 8, wherein: A long hole (9-1) is provided on the unlocking button (9), and the housing (5) is connected to the unlocking button (9) through the long hole (9-1).

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