CN201005811Y

CN201005811Y - Artificial limb knee joint

Info

Publication number: CN201005811Y
Application number: CNU200720103794XU
Authority: CN
Inventors: 陈森荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-12
Filing date: 2007-03-12
Publication date: 2008-01-16
Anticipated expiration: 2017-03-12

Abstract

An artificial limb knee joint comprises a first joint base, a second joint base, a pressure buffer device, and a linkage device, wherein the base of the pressure buffer device is arranged in the second joint base to limit a contain space, a separating element divides the contain space into upper and lower air rooms, the separating element is provided with an inner circumference and a through hole, a piston is provided with a rod portion through the through hole, a first plug in the upper air room, and a second plug in the lower air room, the rod portion and the inner circumference limit a channel communicating the upper and lower air rooms, the linkage device comprises a first linkage rod axially between the first and second joint bases and a second linkage rod axially connected between the first linkage rod and the piston, therefore, when the first joint base rotates relatively to the second joint base, the air in the upper and lower air rooms can flow via the channel to reduce production complexity and cost.

Description

The artifucial limb knee joint

Technical field

This utility model relates to a kind of artifucial limb knee joint, is meant the kneed pressure buffer device of a kind of artifucial limb especially.

Background technology

As shown in Figure 1, general artifucial limb knee joint 1 comprises one first socket joint 11 and a second joint seat 12, be connected via first trace 13 between first,

second socket joint

11,12, the buffer unit 14 of artifucial limb knee joint 1 is arranged in the second joint seat 12 and with first socket joint 11 and is connected, and obtains buffering so that be delivered to the up downforce of walking of pedestal 11 from artifucial limb huckle (figure does not show).Buffer unit 14 comprises that the accommodation space of being located in the second joint seat 12 141, is fixedly arranged on the sealing seat 142 in the accommodation space 141, and a piston 143 that is arranged in the accommodation space 141.Sealing seat 142 is divided into a upper chamber 144 and a lower chamber 145 with accommodation space 141 inner regions, piston 143 has first cock body 146 that one and second trace 15 articulates, first cock body, 146 bottoms protrude out a bar portion 147 of passing sealing seat 142 down, bar portion 147 bottoms be provided with one be positioned at lower chamber 145 and with second cock body 148 of spring 16 butts.In addition, buffer unit 14 also comprises the runner 149 of being located at second joint seat 12 1 sides and upper chamber 144 being connected with lower chamber 145, reaches one in order to the regulating part 150 of control gas by the flow of runner 149.

When artifucial limb knee joint 1 is converted to case of bending by straight configuration, first socket joint 11 is rotated and is ordered about second trace 15 towards the clockwise direction shown in the arrow V and moves down, make piston 143 be directed downwards mobile along arrow VI, this moment, first cock body 146 was with the extruding of the gas in the upper chamber 144 and in runner 149 is circulated to lower chamber 145, face upward or downward displacement by regulating part 150, work covers the big or little adjusting of runner 149 areas, with the size of control gas by the flow of runner 149, the pliability when controlling 1 bending of artifucial limb knee joint thus.When stretching artifucial limb knee joint 1, move on the piston 143, second cock body 148 of piston 143 is with the extruding of the gas in the lower chamber 145 and in runner 149 is circulated to upper chamber 144, collocation regulating part 150 control gases are circulated to the flow of upper chamber 144 by lower chamber 145, the pliability when controlling artifucial limb knee joint 1 thus and stretching.Yet, buffer unit 14 needs at second joint seat 12 1 sides design runner 149 upper chamber 144 to be connected with lower chamber 145, therefore second joint seat 12 need increase thickness when design, make runner 149 and regulating part 150 all can be arranged at second joint seat 12 homonymies, this kind design not only increases the complexity in the manufacturing, more increases the cost of manufacturing.

Summary of the invention

Main purpose of the present utility model provides a kind of simple structure, low cost of manufacture, and crooked, stretch and move artifucial limb knee joint smoothly.

This utility model artifucial limb knee joint comprises:

One first socket joint;

One second joint seat is located at this first socket joint below;

One pressure buffer device comprises:

One pedestal is arranged in this second joint seat and defines an accommodation space;

One separator, being arranged in this pedestal and this accommodation space is separated is a upper chamber and a lower chamber, this separator has an inner peripheral surface, reaches one and is defined the perforation that this upper and lower air chamber of sening as an envoy to is connected by this inner peripheral surface;

One piston, can be located in this accommodation space up or down, and have the bar portion, of passing this perforation be located at this bar portion and be positioned at this upper chamber first cock body, and one be arranged at this bar portion and be positioned at second cock body of this lower chamber, this bar portion defines a runner that this upper and lower air chamber is connected jointly with the inner peripheral surface of this separator;

And

One interlinked mechanism, comprise that one is articulated in first trace between this first socket joint and this second joint seat, and second trace that is articulated in this first trace and this piston tip, when this first socket joint is rotated with respect to this second joint seat via this interlinked mechanism by this, first, second cock body of this piston can circulate the gas in this upper and lower air chamber via this runner respectively at this upper and lower air chamber intrinsic displacement.

Aforesaid artifucial limb knee joint, wherein, this pressure buffer device also comprises to be located in this lower chamber and to be connected to flexible member between this second cock body and this pedestal.

Aforesaid artifucial limb knee joint, wherein, this interlinked mechanism comprises that also one is articulated between this first socket joint and this second joint seat and is positioned at the preceding trace of this first trace front side.

This utility model artifucial limb knee joint, bar portion external diameter by making piston is less than the piercing aperture by inner peripheral surface defined, make define between the bar portion of the inner peripheral surface of separator and piston send as an envoy on, the runner that lower chamber is connected, when therefore the artifucial limb knee joint is transformed to case of bending by straight configuration, first cock body can be squeezed to the gas in the upper chamber in the lower chamber via runner, when the artifucial limb knee joint is transformed to straight configuration by case of bending, second cock body of piston can be squeezed to the gas in the lower chamber in the upper chamber via runner, so the thickness that need not increase the second joint seat, therefore can reduce the complexity in the manufacturing and the cost of manufacturing additionally to do the design of runner.

For in detail this utility model being described in detail more, enumerate preferred embodiment and description of drawings as back:

Description of drawings

Fig. 1 is the cutaway view of general artifucial limb knee joint at a case of bending;

Fig. 2 is a cutaway view of the kneed preferred embodiment of this utility model artifucial limb;

Fig. 3 is a cutaway view of this preferred embodiment;

Fig. 4 is a partial enlarged drawing of this preferred embodiment;

Fig. 5 is a cutaway view of this preferred embodiment.

Primary clustering symbol description among the figure:

200: 2: the first socket joint 21 of artifucial limb knee joint: pedestal 22: connecting rod 3: second joint seat 4: pressure buffer device 41: pedestal 411: 413: the second pedestals 414 of 412: the first pedestals of accommodation space: end wall 415: shoulder 416; Upper chamber 417: lower chamber 42: separator 421: inner peripheral surface 422: perforation 423: runner 43: 431: the first cock bodys 432 of piston: 433: the second cock bodys 434 of bar portion: pivoted pole 44: flexible member 5: 51: the first traces 52 of interlinked mechanism: preceding trace 53: the second trace I, II, III, IV, V: arrow

The specific embodiment

As shown in Figures 2 and 3, it is the kneed preferred embodiment of this utility model artifucial limb, this artifucial limb knee joint 200 is in order to connect an artifucial limb huckle (figure does not show) and an artifucial limb calf (figure does not show), and artifucial limb knee joint 200 comprises one first socket joint 2, a second joint seat 3, a pressure buffer device 4 and an interlinked mechanism 5.

First socket joint 2 comprises a pedestal 21 in order to be connected with the artifucial limb huckle, reach a connecting rod 22 that is connected and extends backward with pedestal 21, second joint seat 3 is hollow tubular and its bottom in order to be connected with the artifucial limb calf, on one first trace 51 of interlinked mechanism 5, following two ends are articulated in the rear side top of the connecting rod 22 and the second joint seat 3 of first socket joint 2 respectively, and before one on the trace 52, following two ends are articulated in the top, front side of the pedestal 21 and the second joint seat 3 of first socket joint 2 respectively, make that artifucial limb knee joint 200 can conversion between a straight configuration (Fig. 2) and a case of bending (Fig. 3).

As Fig. 2, Fig. 3 and shown in Figure 4, pressure buffer device 4 is arranged in the second joint seat 3, and comprise the tubular pedestal 41 that is engaged in the second joint seat 3, and be arranged at a separator 42, a piston 43 and a flexible member 44 in the accommodation space 411 of pedestal 41 respectively.Pedestal 41 has first pedestal 412 that is spirally connected with second joint seat 3, and second pedestal 413 that is bolted in first pedestal, 412 bottoms, first, second pedestal 412,413 defines accommodation space 411 jointly, be butted on middle place of separator 42 outer surfaces and separator 42 bottom surfaces respectively through the end wall 414 of first pedestal, 412 bottoms and the shoulder 415 of second pedestal, 413 internal faces, make separator 42 be fixed between first, second pedestal 412,413 and and separate into a upper chamber 416 and a lower chamber 417 accommodation space 411.

Separator 42 has an inner peripheral surface 421, and one defined the perforation 422 that send as an envoy to upper chamber 416 and lower chamber 417 link by inner peripheral surface 421, piston 43 has first cock body 431 that is positioned at upper chamber 415, one by extending down and pass perforation 422 bar portion 432 in first cock body, 431 bottoms, and one be fixed in bar portion 432 positon of near bottom and be positioned at second cock body 433 of lower chamber 417, the external diameter of bar portion 432 is slightly less than perforation 422 apertures of being defined by inner peripheral surface 421, and being two ends, flexible member 44 is connected to the compression spring of second cock body, 433 bottoms and second pedestal, 413 diapires respectively, in order to the reseting elasticity of piston 43 to be provided.Be bolted with a pivoted pole 434 in first cock body 431 of piston 43, interlinked mechanism 5 comprises that also two ends are articulated in first trace, 51 front sides and pivoted pole 434 vertical second connecting rods 53 respectively, thus first,

second socket joint

2,3 see through first trace 51 and before trace 52 stretch, between case of bending during conversion, first trace 51 can order about second connecting rod 53 and drive pistons 43 upper and lower moving back and forth in the accommodation space 411 of pedestal 41.

When artifucial limb knee joint 200 during at straight configuration, pedestal 21 end faces of first socket joint 2 up, and first socket joint 2 is positioned at 3 top of second joint seat, and this moment, first, second cock body 431,433 of piston 43 laid respectively at proximal portions in upper chamber 416 and the lower chamber 417.When artifucial limb knee joint 200 is transformed to case of bending by straight configuration, first socket joint 2 towards one as shown by arrow I clockwise direction rotation and pedestal 21 end faces towards the rear, and the past top rake in the top that drives first trace 51 and preceding trace 52 simultaneously, make second trace 53 move down and drive piston 43 towards moving down just like the direction shown in the arrow II, this moment piston 43 first, second cock body 431,433 compress upper chamber 416 and lower chamber 417 respectively, and first cock body 431 is squeezed to the gas in the upper chamber 416 in the lower chamber 417 via the runner 423 that is defined between the inner peripheral surface 421 of separator 42 and the bar portion 432, and while second cock body, 433 compression elastic elements 44 also make its distortion and accumulate reseting elasticity.

As Fig. 2 and shown in Figure 5, when artifucial limb knee joint 200 is straight configuration by the case of bending answer, first socket joint 2 is towards rotating just like the counter clockwise direction shown in the arrow III, and the past rear-inclined in the top that drives first trace 51 and preceding trace 52 simultaneously, make and move and drive piston 43 on second trace 53 towards up moving just like the direction shown in the arrow IV, the reseting elasticity of flexible member 44 orders about on second cock body 433 and moves at this moment, and second cock body 433 is squeezed to the gases in the lower chamber 417 in the upper chamber 416 via runner 423.

Runner 423 designs between the inner peripheral surface 421 by separator 42 and the bar portion 432 of piston 43, when artifucial limb knee joint 200 is transformed to case of bending by straight configuration, first cock body 431 of piston 43 can be squeezed to the gas in the upper chamber 416 in the lower chamber 417 via runner 423, otherwise, when artifucial limb knee joint 200 is transformed to straight configuration by case of bending, second cock body 433 of piston 43 can be squeezed to the gas in the lower chamber 417 in the upper chamber 416 via runner 423, therefore the thickness that does not need to increase second joint seat 3 to be additionally to do the design of runner, reduces the complexity on making and the cost of manufacturing thus.In addition, by the cushion effect that air pressure produced, pliability and smoothness in the time of increasing by 200 bendings of artifucial limb knee joint and stretch action.

Conclude above-mentioned, the artifucial limb knee joint 200 of present embodiment, piston 43 bar portions 432 external diameters are less than perforation 422 apertures that defined by inner peripheral surface 421, make define between the bar portion 432 of the inner peripheral surface 421 of separator 42 and piston send as an envoy on, lower chamber 416,417 runners that are connected 423, therefore when artifucial limb knee joint 200 is transformed to case of bending by straight configuration, first cock body 431 can be with in the lower chamber 417 of the gas in the upper chamber 416 via runner 423 extruding, when artifucial limb knee joint 200 is transformed to straight configuration by case of bending, second cock body 433 of piston 43 can be squeezed to the gas in the lower chamber 417 in the upper chamber 416 via runner 423, so the thickness that need not increase second joint seat 3, reduces the complexity on making and the cost of manufacturing thus additionally to do the design of runner.

In sum, only be preferable exemplifying embodiment of the present utility model, be not in order to limit this utility model; All other do not break away from equivalence of the present utility model to be modified or displacement, all should be contained in this utility model scope.

Claims

1. an artifucial limb knee joint is characterized in that, comprising:

One first socket joint;

One second joint seat is located at this first socket joint below;

One pressure buffer device comprises:

And

One interlinked mechanism comprises that one is articulated in first trace between this first socket joint and this second joint seat, and second trace that is articulated in this first trace and this piston tip.

2. artifucial limb knee joint as claimed in claim 1 is characterized in that, wherein, this pressure buffer device also comprises to be located in this lower chamber and to be connected to flexible member between this second cock body and this pedestal.

3. artifucial limb knee joint as claimed in claim 1 is characterized in that, wherein, this interlinked mechanism comprises that also one is articulated between this first socket joint and this second joint seat and is positioned at the preceding trace of this first trace front side.