CN210077958U

CN210077958U - Flexible artificial limb finger

Info

Publication number: CN210077958U
Application number: CN201920515391.9U
Authority: CN
Inventors: 胡宾宾; 朱金营; 田野; 王延超; 王宇轩
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-02-18
Anticipated expiration: 2029-04-16

Abstract

The utility model discloses a flexible artificial limb finger, which comprises an upper joint, a lower joint and a rotating shaft for connecting the upper joint and the lower joint, wherein a shaft sleeve is also arranged on the rotating shaft positioned at the inner side of the upper joint; when the upper joint is pressed down along the bending direction of the fingers, the upper joint rotates around the rotating shaft, and the elastic connecting piece generates a counterforce action force; when the upper joint is loosened, the elastic connecting piece drives the upper joint to rotate around the rotating shaft to reset by means of rebound acting force. As the fingers are provided with the upper joints and the lower joints, and the shaft sleeves and the elastic connecting pieces are arranged on the connecting rotating shafts of the upper joints and the lower joints, the fingers can generate flexibility when gripping objects, can better simulate the gripping performance of a real hand and is close to the real hand.

Description

Flexible artificial limb finger

Technical Field

The utility model relates to a bionic hand technical field, concretely relates to flexible artificial limb finger.

Background

The myoelectric prosthetic hand can replace incomplete limbs, can provide convenience for the daily life of patients with upper limb disabilities, and is one of the important research directions in the field of rehabilitation engineering at present.

The fingers of the artificial hand play a key grasping function, the existing artificial fingers can realize the bending drive of all joints of the fingers by arranging the stretching mechanisms in all the connected joints, the structure is complex, when the fingers grasp objects, the soft touch feeling contacted with the grasped objects is poor, and the grasping adjusting function of the fingers is poor.

SUMMERY OF THE UTILITY MODEL

To the above not enough among the prior art, the utility model provides a flexible artificial limb finger, its simple structure is used in the artificial limb hand, can more truly imitate the gripping effect of real people's finger.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an artificial limb finger comprises an upper joint, a lower joint and a rotating shaft for connecting the upper joint and the lower joint, wherein a shaft sleeve is further arranged on the rotating shaft positioned on the inner side of the upper joint; when the upper joint is pressed down along the bending direction of the fingers, the upper joint rotates around the rotating shaft, and the elastic connecting piece generates a counterforce action force; when the upper joint is released and pressed down, the elastic connecting piece drives the upper joint to rotate around the rotating shaft to reset by means of rebound acting force.

The elastic connecting piece is a torsion spring, and two ends of the torsion spring extend out of the surface of the torsion spring respectively and are clamped in clamping grooves formed in the upper joint and the lower joint.

A finger decoration layer is sleeved on the upper joint.

The finger decorative layer is a rubber decorative layer.

The finger decorative layer comprises a first decorative layer and a second decorative layer which are positioned on two sides of the upper joint, grooves for containing the upper joint are formed in the first decorative layer and the second decorative layer respectively, and the upper joint is packaged in the grooves through fastening connecting pieces after the first decorative layer and the second decorative layer are buckled.

The utility model discloses technical scheme has following advantage:

A. the utility model discloses owing to have upper joint and lower joint, through setting up axle sleeve and elastic connection spare in the connection pivot of upper joint and lower joint for the finger produces flexibility when gripping article, more can simulate real staff's gripping performance, is close real staff.

B. The utility model coats a soft finger decoration layer on the outer surface of the upper joint of the finger, adopts an integral or split finger decoration layer structure, is screwed and installed on the finger of the artificial limb by a fastening connecting piece, and has good gripping effect; the size of the finger decoration layer can be changed through the finger decoration layer so as to change the size of the whole artificial hand, and therefore the artificial hand is suitable for different people such as men, women and children.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front view of a flexible prosthetic finger provided in the present invention;

FIG. 2 is a schematic side view of the structure of FIG. 1;

fig. 3 is a schematic view of the exploded structure shown in fig. 1.

Description of reference numerals:

1-upper joint; 2-lower joint; 3-a rotating shaft; 4-shaft sleeve; 5-an elastic connecting piece; 6-a clamping groove;

7-a finger decoration layer, 71-a first decoration layer, 72-a second decoration layer; 8-a groove;

9-fastening the connecting piece.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the utility model provides a flexible artificial finger, which comprises an upper joint 1, a lower joint 2 and a rotating shaft 3 connecting the upper joint 1 and the lower joint 2, wherein a shaft sleeve 4 is arranged on the rotating shaft 3 at the inner side of the upper joint 1, an elastic connecting piece 5 is sleeved on the shaft sleeve 4, one end of the elastic connecting piece 5 is connected with the upper joint 1, the other end is connected with the lower joint 2, and the shaft sleeve 4 is in clearance fit connection with the rotating shaft 3; when the upper joint 1 is pressed downwards along the bending direction of the fingers, the upper joint 1 rotates around the rotating shaft 3, and the elastic connecting piece 5 generates a reaction elastic acting force; when the upper joint 1 is released, the elastic connecting piece 5 drives the upper joint 1 to rotate around the rotating shaft 3 to reset by means of rebound acting force. Due to the fact that the upper joint 1 and the lower joint 2 are arranged, the shaft sleeve 4 and the elastic connecting piece 5 are arranged on the connecting rotating shaft 3 of the upper joint 1 and the lower joint 2, so that fingers can generate flexibility when gripping objects, gripping performance of a real human hand can be simulated, and the hand is close to the real human hand.

As shown in fig. 2, the elastic connecting element 5 is preferably a torsion spring, and two ends of the torsion spring respectively extend out of the surface of the torsion spring and are clamped and fixed in clamping grooves 6 formed in the upper joint 1 and the lower joint 2. The finger can produce gentle effect of touching under the elastic deformation effect of torsional spring when gripping article, can automatic re-setting when releasing the gripping to article. When a downward force is applied to the upper joints 1 of the fingers, the fingers can automatically rebound through the torsion spring, the fingers can only bend towards one direction, and the fingers cannot bend towards the other direction, so that the fingers of the artificial fingers are not bent when gripping objects, and the artificial fingers are beneficial to gripping the objects.

The utility model discloses in further improve the flexible gripping to the object, still set up a finger decorative layer 7 on upper joint 1, this kind of structure not only is applicable to the prosthetic hand of 3 fingers, is applicable to the prosthetic hand of 5 fingers equally. As shown in fig. 3. The finger decoration layer 7 is preferably a rubber decoration layer, and may be an integral structure directly covering the upper joint. Of course, the structure shown in fig. 3 can also be preferably adopted. The finger decoration layer 7 comprises a first decoration layer 71 and a second decoration layer 72 which are positioned on two sides of the upper joint 1, grooves 8 used for accommodating the upper joint 1 are formed in the first decoration layer 71 and the second decoration layer 72 respectively, and the upper joint 1 is packaged in the groove 8 through a fastening connecting piece 9 after the first decoration layer 71 and the second decoration layer 72 are buckled. The size of the outer decoration of the fingers can be changed through the finger decoration layer 7 so as to change the size of the whole artificial hand, thereby being suitable for different people (men, women and children).

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A flexible artificial limb finger comprises an upper joint (1), a lower joint (2) and a rotating shaft (3) for connecting the upper joint (1) and the lower joint (2), and is characterized in that the rotating shaft (3) positioned on the inner side of the upper joint (1) is also provided with a shaft sleeve (4), an elastic connecting piece (5) is sleeved on the shaft sleeve (4), one end of the elastic connecting piece (5) is connected with the upper joint (1), the other end of the elastic connecting piece is connected with the lower joint (2), and the shaft sleeve (4) is in clearance fit connection with the rotating shaft (3); when the upper joint (1) is pressed downwards along the bending direction of the fingers, the upper joint (1) rotates around the rotating shaft (3), and the elastic connecting piece (5) generates a reaction elastic acting force; when the upper joint (1) is released, the elastic connecting piece (5) drives the upper joint (1) to rotate around the rotating shaft (3) to reset by means of rebound acting force.

2. The flexible prosthetic finger according to claim 1, characterized in that the elastic connecting piece (5) is a torsion spring, and two ends of the torsion spring respectively extend out of the surface of the torsion spring and are clamped in clamping grooves (6) formed in the upper joint (1) and the lower joint (2).

3. The flexible prosthetic finger according to claim 1 or 2, characterized in that a finger finishing layer (7) is applied on the upper joint (1).

4. The flexible prosthetic finger according to claim 3, characterized in that the finger decoration (7) is a rubber decoration.

5. The flexible prosthetic finger according to claim 4, characterized in that the finger decoration layer (7) comprises a first decoration layer (71) and a second decoration layer (72) which are positioned at two sides of the upper joint (1), grooves (8) for accommodating the upper joint (1) are respectively formed on the first decoration layer (71) and the second decoration layer (72), and the upper joint (1) is sealed in the grooves (8) through a fastening connecting piece (9) after the first decoration layer (71) and the second decoration layer (72) are buckled.