JPH11207042A - Artificial arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an artificial arm approximate to a human hand. SOLUTION: An artificial arm main body 2 from a wrist to finger tips is formed of rubber of a proper hardness and weight to bend the joints of the respective fingers 3 of the main body 2. Thin grooves opening to the side of a palm are provided in the range of length from the tip parts of the respective fingers 3 to the wrist to insert artificial muscle tendons 6 consisting of shape memory resin or its composite material as muscle tendons into the respective thin grooves. Tip parts on the finger tip sides of the muscle tendons 6 are fixed to the tip parts of the finger tips and the rear tip parts of the muscle tendons 6 are movably put through to stopper parts 12 provided at the wrist position of the main body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prosthetic hand that is very similar to a human hand.

[0002]

2. Description of the Related Art Since ordinary people have lost their loved objects,
Sometimes I see a photo as a reminder of memorization. In addition, prosthetic hands such as mannequin dolls cannot move, and therefore, change little. In addition, artificial hands such as robots having extremely sophisticated structures and complicated movements have already been proposed.

[0003]

Therefore, in recollection or the like, simply looking at the pictures does not give a real feeling and does not provide sufficient comfort. Also, the elaborate prosthesis is
Although it moves almost like a human hand by a driving source such as a motor, it is not only extremely expensive but also complicated in movement.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a prosthesis which can move very closely to a human hand without using a special driving source. To make the prosthesis body from the fingertip to the fingertip, and to allow the joint of each finger of the prosthesis body to be bent, and to provide a narrow groove that opens to the palm side in the length range from the tip of each finger to the wrist, A simulated muscle tendon made of a shape memory resin or a composite material thereof is inserted into the narrow groove as a muscle tendon, and the tip of the simulated muscle tendon is fixed to the tip of the fingertip. The prosthesis is configured to be movably inserted into a stopper portion provided at a wrist position of the main body of the prosthesis.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. A prosthetic hand 1 of the present invention has a prosthetic body 2 similar to a human hand made from a mold rubber having an appropriate weight and hardness in a portion from the wrist, and includes five fingers 3 of the prosthetic body 2. On the palm side, a narrow groove 4 is formed which opens from the wrist to the fingertip and is open on the palm side.

The joint portion of each finger 3 is provided with a lateral V-shaped groove 5 so that it can be bent by about 90 degrees, and a thin string made of a shape memory resin or a composite material thereof is provided inside each of the narrow grooves 4. Simulated muscle tendon 6 so that it can move,
The open portion of the narrow groove 4 is stopped by the fitting 7 for preventing the simulated muscle tendon 6 from deviating.

The simulated muscle tendon 6 is fixed by fitting a cylindrical member 8 provided at the tip of the fingertip side into a vertical hole 9 formed at the tip of the narrow groove 4. The extended portion is inserted into a through hole 11 formed in the base 10 and extended to the outside, and the extended portion is held by a stopper portion 12 made of a rubber stopper or other members. Since the cylindrical member 8 comes off from the vertical hole 9, the simulated muscle tendon 6 can be removed from the narrow groove 4 and replaced.

The prosthetic arm body 2 constructed as described above is
An outer skin 13 such as a rubber glove is applied to the outer surface to complete the process.
Further, a reinforcing piece 14 made of artificial leather or the like may be provided in a portion of each finger 3 where the V-shaped groove 5 is provided.

The prosthetic hand 1 of the present invention has the above-described structure.
The proximal end of the simulated muscle tendon 6 is stopped by the stopper 12 while each finger 3 is bent by pulling the simulated muscle tendon 6.
Therefore, since the artificial hand 1 becomes like a fist, when the human hand is slid between the fingers 3 and gripped, the artificial hand 1 becomes familiar with the hand and is appropriately tightened due to the elasticity of the simulated muscle tendon 6. Along with the touch, it feels like shaking hands with a human hand.
In addition, since the tightening force decreases as time passes in a gripped state, it is possible to eliminate annoying feelings due to persistent feelings caused by holding for a long time.

[0010]

Therefore, according to the present invention, for men,
Not only can a prosthetic hand for women and various sizes be produced, but also because it has a simple structure and a small number of parts, it can also be produced personally. In addition, since there is a minimum necessary movement especially without using external electric energy, not only can you provide a prosthetic hand with a real feeling, but also if you have a simulated muscle tendon and outer skin as a spare Easy to repair. Moreover, it is possible to freely imagine and the like using the artificial hand of the present invention as a medium, and to enjoy the pleasure of producing itself, leading to the recovery and cultivation of various functions, and also to the mannequin and other It can be applied to dolls or used in combination with media, etc., and is of high practical value.

[Brief description of the drawings]

FIG. 1 is a front view, partially in section, showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a finger portion.

FIG. 3 is a plan view of a finger portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Prosthesis 2 Prosthesis main body 3 Finger 4 Narrow groove 5 V-shaped groove 6 Simulated muscular tendon 7 Departure prevention metal fitting 8 Cylindrical material 9 Vertical hole 10 Wrist part 11 Through hole 12 Stopper part 13 Outer skin 14 Reinforcement piece

Claims (1)

[Claims] 1. A prosthesis main body from a wrist to a fingertip is made of rubber having an appropriate hardness and weight, and a joint of each finger of the prosthesis main body can be bent, and a length from a tip portion of each finger to a wrist. A narrow groove is provided on the palm side in the range, and a simulated muscle tendon made of a shape memory resin or a composite material thereof is movably inserted into each of the narrow grooves as a muscle tendon. A prosthetic hand fixed to the tip of the fingertip and movably secured to the stopper provided at the wrist position of the prosthetic arm, while the rear end of the simulated muscle tendon is movable.