CN209611438U - New type of passive artificial hand - Google Patents

Abstract

A kind of new type of passive artificial hand, finger can be locked in different deployed positions, have very strong utility function.

Description

New type of passive artificial hand

Technical field

Cosmetic hand state can not only be presented the present invention relates to prosthesis technique field, in particular to one kind but also had grasping, lock Fixed, extract function multi-functional passive artificial hand.

Background technique

Current most commonly used upper extremity prosthesis is cosmetic limb, but this artificial limb does not have grip function, and finger can not Locking lifts object, and existing passive artificial hand is also without finger lock function both at home and abroad, therefore can only lift light object, and object is slightly Weight a bit, can be more than the spring force of closure finger, slip object, and rope control artificial hand only has zero-bit self-locking, as long as object is slightly thick, hand Refer to zero-bit of the closure less than thumb and forefinger contact, mentioning slightly weight body can also slip；These artificial hands and common electric, myoelectric control Artificial hand can only be usually that the nature that the five fingers loosen cannot be presented to the tense situation grasped is referred to；Above-mentioned artificial hand and common one A motor-driven electronic, myoelectrically controlled hand, nameless and little finger of toe activity is driven by middle finger, in the middle finger of gloves Space, in addition to the middle finger for having active movement, in side, there are also an additional skeletons, this skeleton and little finger of toe, nameless skeleton are in root Portion is connected, and drives gloves movement by the middle finger of active movement, and gloves drive the additional skeleton motion in middle finger, make nameless and small Finger is opened and closed together with middle finger, is not affixed to together since middle finger adds skeleton with middle finger, and nameless and little finger of toe activity can be stagnant It afterwards in middle finger, and cannot fully move to position, need to invent a kind of novel artificial hand, overcome above-mentioned existing for domestic and international prosthesis technique A variety of disadvantages.

Summary of the invention

In hand cradle, using control-rod axis as the center of circle, it is mounted with that one section of arc-shaped rack gear, control-rod pressing position are mounted with One ship shape button, ship shape button have circuit frequently with rocker type switch Machinery Ministry structure, inside is equipped with spring, has double Steady-state performance, ship shape push button shaft are mounted on control-rod end, and ship shape button front end is connect by locking bar axis with locking bar, can be opposite Rotation pushes locking bar to move forward when pressing the front end by rocker type switch, and one of the lock pin insertion arc-shaped rack of locking bar end Tooth socket locks control-rod, and since control-rod and five fingers are all to interlock, finger is just locked.When pressing force backward, Ship shape button pulls locking bar to move backward, and so that the lock pin on locking bar head is detached from the tooth socket of arc-shaped rack, unlocks, control-rod is just Up and down finger can be made to be opened and closed.When control-rod is depressed, finger opens, and loosens pressing force, prosthetic finger is in elastomeric element The lower closure of effect, grabs object, completes after grasping, lift heavy objects if necessary, then pressing rocker type switch front end makes finger Locking, object just will not slip, and after stopping pressing, still keep finger lock state.

Locking and unlocking are started that it also can be used in addition to using the bistable behaviour rocker type switch having to push and pull locking bar He presses locking bar end for example, by using pushing locking bar to slide in the sliding slot of control-rod before and after the finger of pressing control-rod at method It is adapted to the spill of thumb at pressure, convenient for pushing, the stabilization of locking and unlocking is solved with the bulb plunger on control-rod Property, bulb can respectively enter one in two arc pits on locking bar.Another method be using have press and pop up bistable The push switch of state.

In order to allow finger that relaxation state to be presented when not grasping, there is a thumb additional before thumb joint axis Passive joint, the frictional resistance for rotating this joint can be adjusted by a screw, should be adjusted this and be closed frictional resistance greater than gloves pair The resistance of thumb opening and closing keeps thumb opening and closing unaffected.When pulling thumb to grip function position is referred to, passive joint is limited, Make this passive joint grasp for artificial hand and lift weight to be all entirely unaffected by.Refer to be locked in and micro- in the wrong loosen shape when another four State, while thumb is pulled to, from release position, this artificial hand goes completely into a cosmetic hand state close to palm.Additional quilt Diarthrodial shaft core position can also be overlapped with thumb joint axle center.

This additional thumb passive joint can also be used for myoelectric control or electrically powered hand, make these artificial hands that beauty can also be presented Relaxation state.

There is the elastic material fingerstall as false muscle outside five finger skeletons, the elastic material outside middle finger skeleton refers to Set has two-chamber, and lumen accommodates middle finger main framing, and side chamber accommodates the middle finger frame side for driving nameless and little finger of toe, middle finger frame side and nothing Name refers to that frame, little finger of toe frame are connected in finger root, forms chevron skeleton, when wearing emulation gloves, first puts on chevron skeleton respectively The elastic fingers of these three fingers, then this three finger is put into emulation gloves, artificial hand is then put on into Bionic gloves, it will in gloves The lumen of fingerstall in the insertion of middle finger main framing.

The connection method of this prosthetic finger is equally applicable to a common motor-driven myoelectric control or electrically powered hand, with And rope control artificial hand, it is easy when not only making to wear gloves through thinner wrist, but also so that the little finger of toe third finger is able to maintain linkage when grasping will not Lag.

Detailed description of the invention

Fig. 1 is new type of passive artificial hand structure principle chart

Fig. 2 is new type of passive artificial hand two-chamber middle finger nested structure schematic diagram

Figure label is described as follows:

1 index finger

2 thumbs

3 index finger joint shafts

4 control-rod axis

5 connecting rods

6 elastomeric elements

7 screws

8 control-rods

9 spacer pins

10 ship type push button shafts

11 connecting plates

12 wrist rings

13 ship shape buttons

14 locking bars

15 arc-shaped racks

16 lock pins

17 locking bar axis

18 hand cradle

19 additional passive joints

20 thumb upper sections

21 thumb lower sections

Fingerstall in 22

23 lumens

24 side chambers

25 unknown fingerstall

26 middle finger frame side

27 nameless framves

28 little finger of toe framves

29 sliding slots

30 lock pins

31 small fingerstall

Specific embodiment:

See Fig. 1, Fig. 2, control-rod axis (4) is also thumb joint axis in this example, on hand cradle (18), with control-rod axis (4) it is the center of circle, is mounted with one section of arc-shaped rack gear (15), has filled a ship shape button (13), ship shape in control-rod (8) end The axis (10) of button (13) is mounted on control-rod (8) end, and the front end of ship shape button (13) is equipped with a locking bar axis (17), makes to lock The front end of bar (14) and ship type button (13) is rotatablely connected, and the front end of locking bar (14) is lock pin (16), and lock pin (16) can control Sliding in the sliding slot (29) of bar (8), sliding slot (29) is the radial direction in arc-shaped rack (15), makes lock pin (16) always in circle The radial direction activity of arc-shaped rack (15).Lock pin (16) end is connect by lock pin (30) with locking bar, when pressing by ship shape The front end of (13) is switched, is pushed locking bar (14), a tooth socket of lock pin (16) insertion arc-shaped rack (15) of locking bar (14) end, It locks control-rod (8), since control-rod (8) and five fingers are all to interlock, finger is just locked.When pressing ship shape is opened (13) rear end is closed, rocker type switch (13) pulls locking bar (14), and lock pin (16) exits tooth socket, unlocks control-rod (8), control-rod (8) It is depressed, finger opens, and loosens pressing force, and prosthetic finger is just closed under the action of elastomeric element (6), grabs object, completes to grab After holding, lift heavy objects if necessary, then pressing rocker type switch (13) front end locks finger, and object just will not slip.

In order to allow finger that relaxation state to be presented when not grasping, thumb has the thumb for abutting control-rod axis (4) Additional passive joint (19), the frictional resistance for rotating this joint can be adjusted by screw (7), and adjusting screw (7) can clamp or loosen Contact pressure between thumb upper section (20) and thumb lower section (21) at additional passive joint (19).Thumb upper section (20) has limit It sells (9), when thumb upper section (20) opens up into grip function position is referred to, spacer pin (9) blocks limit by thumb lower section (21), makes vacation This joint is all motionless when hand grasps and lifts weight, and function is unaffected.When prosthetic finger is locked in half open configuration, thumb is then pulled Refer to that upper section (20) are arrived close to the natural relaxation position of palm, this artificial hand goes completely into a cosmetic hand state.

See Fig. 2, there is the elastic material fingerstall as false muscle outside five finger skeletons, it is double to be that middle fingerstall (22) has Chamber is shown in Fig. 2.Lumen (23) accommodates artificial hand middle finger main framing, and side chamber (24) accommodates the middle finger frame side (26) of chevron skeleton, middle finger side Frame (26) is connected with nameless frame (27), little finger of toe frame (28) chevron, and when wearing emulation gloves, chevron skeleton is first put on this respectively The elastic fingers of three fingers, then by this three refer to be put into emulation gloves, artificial hand is then put on into Bionic gloves, in gloves will in Refer to the lumen (23) of fingerstall (22) in main framing insertion.

Within the scope of the present invention, there can be the different various schemes for implementing this patent, the description and the appended drawings should be considered as It is illustrative and not restrictive.

Claims (1)

1. a kind of new type of passive artificial hand, which is characterized in that its structure remove including finger, hand cradle, control-rod, connecting rod, elastomeric element, Other than connecting plate, wrist ring, using passive prosthetic hand control lever axis as the center of circle, it is mounted with that an arc-shaped rack, control-rod are pressed in hand cradle Pressure position is mounted with a ship shape button, ship shape button have circuit frequently with rocker type switch Machinery Ministry structure, inside dress There is spring, there is bistable behaviour, ship shape push button shaft is mounted on control-rod end, and ship shape button front end passes through locking bar axis and locking bar Connection, when pressing force backward, ship shape button pull locking bar, make locking bar head lock pin be detached from arc-shaped rack tooth socket, release lock Fixed, control-rod can be up and down, be opened and closed finger can, all can be by pressing force forward in the different location that finger opens, ship Shape switch pushes locking bar, so that the lock pin on locking bar head is inserted into the correspondence tooth socket of arc-shaped rack, locks finger, after stopping pressing, still Keep finger lock state.