CN202069722U

CN202069722U - Artificial knee joint

Info

Publication number: CN202069722U
Application number: CN2011201277102U
Authority: CN
Inventors: 陈森义; 韩春森
Original assignee: CHANG-YU MECHANICAL SYSTEMS Ltd
Current assignee: CHANG-YU MECHANICAL SYSTEMS Ltd
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2011-12-14
Anticipated expiration: 2021-04-27

Abstract

The utility model discloses an artificial knee joint which comprises a four-bar mechanism, a bearing cylinder, a reset device, and an artificial leg, wherein the bearing cylinder is arranged on the four-bar mechanism, the reset device is movably connected with the four-bar mechanism and has elasticity, and the artificial leg is connected with the four-bar mechanism; in the artificial knee joint, special included angles among four pivots of the four-bar mechanism are utilized, so that moment can be automatically generated when the thigh of a user sheathed in the bearing cylinder walks so as to lead the four-bar mechanism to smoothly act and to bent the joint, and when a sole is about to contact the ground, the four-bar mechanism can be smoothly and automatically locked by means of traction of gravity so as to lead the sole after being contacted with the ground to be capable of supporting the weight of a body stably, thus being capable of leading every step of the user to have enough stability and flexibility.

Description

The justice knee joint

Technical field

This utility model relates to a kind of adopted knee joint, and the adopted knee joint structure of adopted knee joint bending whether flexibility ratio and steadiness is controlled in particularly a kind of action by the user shank.

Background technology

Artifucial limb refers to artificial limb, also claims by " artificial limb ", is for the artificial limb of amputee's use with compensatory damaged limb part function, or is used for covering up the limbs permanent disability, and upper limb artifucial limb and lower limb artifucial limb are arranged.How artifucial limb is made of aluminium, timber, leather, plastic or other material, and metal parts is adopted in its joint, and the main flow of artifucial limb circle is to adopt titanium alloy and carbon fiber material now.With the maximum difference of adopted body (as ocular prosthesis, false nose, wig and so on), be the functional stronger of artifucial limb, and singly refer to upper and lower limb.

The adopted knee joint of the above-knee artifucial limb in the existing lower limb artifucial limb (amputation is to thigh position person use) is used holocentric axle construction mostly, existing adopted knee joint structure Ruo Taisong, then may cause the unsettled stage of adopted lower limb in walking action to produce irregular rocking, or not have enough support forces when contacting to earth; Otherwise, if existing adopted knee joint structure tension, then may influence the smooth degree of walking walking and the soft property of swing, expend muscle power during use, and in the action of walking, also seem not naturally and not attractive in appearance, and unfavorable adopted knee design, more can increase user and fall and cause injured probability.

The utility model content

Main purpose of the present utility model is to provide a kind of structural design of taking into account motility and support strength, in the hope of improving existing single shaft justice knee joint activity motility and the bad problem of support strength.

The kneed feature of justice of the present utility model includes the adopted lower limb that tube, flexibly connects this quadric chain and rubber-like resetting means, is connected this quadric chain with that holds that a quadric chain, is located at this quadric chain; This utility model utilizes the special angle of four pivots of described quadric chain between online, allowing user be inserted in this thigh that holds in the tube can produce a moment automatically when stepping and make this quadric chain produce start with bending joint smooth-goingly, and when sole is desired to contact to earth, then affect this quadric chain to automatically lock by gravity smooth-goingly, energy firm support body wt after sole is contacted to earth, each step that promotes the user walking by this has enough degree of stability and motility.

Technological means of the present utility model includes the adopted lower limb that tube, flexibly connects this quadric chain and rubber-like resetting means, is connected this quadric chain with that holds that a quadric chain, is located at this four connecting rods machine; Described quadric chain includes a first connecting rod, a second connecting rod, a third connecting rod and one the 4th connecting rod, and first end of this first connecting rod and first end of second connecting rod articulate with one first pivot; Second end of first connecting rod and first end of the 4th connecting rod articulate with one the 4th pivot; Second end of second connecting rod and second end of third connecting rod articulate with one second pivot; First end of third connecting rod and second end of the 4th connecting rod articulate with one the 3rd pivot; It is one first online that described first pivot and second pivot are linked to be, and it is one second online that second pivot and the 3rd pivot are linked to be, and the 3rd pivot and the 4th pivot are linked to be a three-line machine, and the 4th pivot and first pivot are linked to be a tetrad machine.Described the 4th pivot and this resetting means help with one stretches the connecting rod flexible connection, resetting means acts on the 4th pivot and action of gravity by its elastic force and when making quadric chain be expanded to limit state, this first online and second online angle are 20 °～25 °, this second online and angle three-line machine are 157 °～162 °, the angle of this three-line machine and tetrad machine is 96 °～100 °, and this tetrad machine and the first online angle are 77 °～81 °.By aforementioned each online angle design, when the thigh that keeps after the user amputation is worn this utility model walking and is made its thigh step paces forward, hold tube produce forward inertial force and first pivot and second pivot between will produce a moment, and then smooth-going drive the quadric chain start and make arthrogryposis; Lost when stepping the active force of step forward when holding tube, auxiliary by the kneed weight of whole justice and resetting means then also locks the automatic and smooth-going ground homing of this quadric chain, is able to body support weight when touching ground under foot.

Resetting means of the present utility model comprises one and is provided with and helps pneumatic cylinder or the oil hydraulic cylinder of stretching spring, and described helping stretched spring and be expanded to lock-out state in order to the auxiliary quadric chain that promotes, with can body support weight; Buffered function when described pneumatic cylinder or oil hydraulic cylinder then provide adopted gonycampsis.

Description of drawings

Fig. 1 is for showing the axonometric chart of this utility model outward appearance.

Fig. 2 is for showing the three-dimensional exploded view of this utility model primary clustering syntagmatic.

Fig. 3 for show each pivot of the present utility model online between the floor map of angle.

Gait cycle sketch map when Fig. 4 generally walks for showing.

Fig. 5 is of the present utility model when holding tube and not lifting for showing, adopted knee joint closes and ties up to lock-out state to support the enforcement sketch map of body weight.

Fig. 6 is of the present utility model when holding tube and lifting forward for showing, adopted knee joint relation automatically terminates locking so that the enforcement sketch map of arthrogryposis.

Fig. 7 is when showing this utility model body support weight, and the active force A direction of the tiptoe of ground and adopted ankle and three-line machine c ' level off to the embodiment sketch map of plumbness gradually.

Fig. 8 shows that the kneed quadric chain of justice of the present utility model can be applied to the embodiment schematic side view of limbs appliance.

Fig. 9 can be applied to the embodiment front-view schematic diagram of limbs appliance for showing the kneed quadric chain of justice of the present utility model.

The specific embodiment

Those skilled in the art below cooperate Figure of description that embodiment of the present utility model is done more detailed description, so that can implement after studying this description carefully according to this.

Consult Fig. 1 and shown in Figure 2, the kneed preferred embodiment of justice of the present utility model, include one hold tube 1, one quadric chain 2, a resetting means 5, with an adopted lower limb 3; Wherein, described quadric chain 2 includes a first connecting rod 21, a second connecting rod 22, a third connecting rod 23 and one the 4th connecting rod 24; First connecting rod 21 has two to be separated and symmetric sidewall 213, two side 213 is respectively arranged with a corresponding A pivot hole 211, an and corresponding B pivot hole 212, first connecting rod 21 also is provided with a discous supporting part 210, in order to the described tube 1 that holds to be installed, to hold tube 1 and be used for the shank that the engage sleeves group keeps after the user amputation above the supporting part 210.

Second connecting rod 22 includes two groups, and it is the body with a suitable length and streamline moulding, and its two ends are provided with one the 2nd A pivot hole 221 and one the 2nd B pivot hole 222 respectively; In the one A pivot hole 211 behind combination one bearings 20 and the pad 200, one first pivot 2a is passed bearing 20 and pad 200 in the 2nd A pivot hole 221 and the A pivot hole 211, finish the pivot joint of first connecting rod 21 and second connecting rod 22.

The two ends of third connecting rod 23 are provided with one the 3rd A pivot hole 231 and one the 3rd B pivot hole 232 respectively, and be combined with resetting means 25 at third connecting rod 23, described resetting means 25 include a restoring cylinder 250, help stretch connecting rod 251, an interlock post 252 and helps and stretches spring 253; Described restoring cylinder 250 can be a kind of pneumatic cylinder or a kind of oil hydraulic cylinder; After inserting bearing 20 in the 3rd B pivot hole 232, pass the 2nd B pivot hole 222 of second connecting rod 22 and the bearing in the 3rd B pivot hole 232 with one second pivot 2b, to finish the pivot joint of second connecting rod 22 and third connecting rod 23.One end of interlock post 252 is connected in restoring cylinder 250, and will help and stretch spring 253 covers and organize in interlock post 252.Restoring cylinder 250 lower ends then connect an adopted lower limb 3, and adopted lower limb 3 lower ends then connect an adopted ankle 4 (as shown in Figure 4).

This utility model provides helps and stretches connecting rod 251 two ends and be respectively equipped with one first perforation 2511 and 1 second and bore a hole 2512, second perforation 2512 is articulated in the other end of interlock post 252 by a rotating shaft, and 2511 of first perforation are articulated in the 4th pivot 2d by another rotating shaft; By this structure, keep vertical states at resetting means 25, and be not subjected to external force and do the time spent, by action of gravity with help the elastic force of stretching spring 253 to act under the 4th connecting rod 2d state, whole quadric chain 2 can launch naturally.

Consult shown in Figure 3, the first pivot 2a and the second pivot 2b of quadric chain 2 of the present utility model are linked to be one first online a ', the second pivot 2b and the 3rd pivot 2c are linked to be one second online b ', the 3rd pivot 2c and the 4th pivot 2d are linked to be a three-line machine c ', and the 4th pivot 2d and the first pivot 2a are linked to be a tetrad machine d '.Resetting means 25 is when helping the elastic force of stretching spring 253 to act on the 4th pivot 2d and action of gravity to cause quadric chain to be expanded to limit state, this first online a ' is 20 °～25 ° with the angle theta 1 of the second online b ', the second online b ' is 157 °～162 ° with the angle theta 2 of three-line machine c ', three-line machine c ' is 96 °～100 ° with the angle theta 3 of tetrad machine d ', and tetrad machine d ' is 77 °～81 ° with the angle theta 4 of the first online a '.

Fig. 4 is for showing the gait cycle sketch map of general walking, show from gait A to gait H to be a gait cycle that right crus of diaphragm is complete among the figure, suppose that right crus of diaphragm is adopted lower limb 3, wherein, gait A is stance phase (Stance Phase) to gait D, gait E to gait H be shaking peroid (Swing Phase).When at stance phase, when needing 3 pairs of human body weights of adopted lower limb to provide support, aforesaid quadric chain can produce locking action automatically; Gait D then shows when adopted lower limb steps (when to be ready entering shaking peroid) forward, and thigh inertia forward will make the quadric chain automatic unlocking and allow knee bend, allows adopted lower limb be lifted and takes a step.

See also shown in Figure 5, when the thigh after the user amputation wear in of the present utility model hold the tube 1 after, when walking is not advanced, under the heel kiss the earth state of justice ankle 4, because the three-line machine c ' of quadric chain 2 of the present utility model is skewed backward, cause whole center of gravity deflection rear and make quadric chain 2 can keep the state of locking, thereby body support weight that can be firm; The first pivot 2a, the second pivot 2b, the 3rd pivot 2c, the 4th pivot 2d, the heel that helps the articulated section of stretching connecting rod 251 and interlock post 252 can not be subjected to adopted ankle 4 contact to earth or the influence of user body wt and pivot interlock.When user is worn this utility model justice knee joint thigh and is swung forward, hold between inertial force that tube 1 swing forward produces and the first pivot 2a and the second pivot 2b and will produce a moment, and then smooth-going drive quadric chain 2 starts and make arthrogryposis (as shown in Figure 6); When holding that tube 1 stops to continue stepping forward and when having lost inertial force forward, then stretch the auxiliary of spring 253 by helping of kneed weight of whole justice and resetting means 25, make this quadric chain 2 return back to original position shown in Figure 5 and locking automatic and smooth-goingly, be able to body support weight when touching ground under foot.

As shown in Figure 7, when another lower limb pendulum of user is lifted forward, and this utility model of temporary transient body support weight is transferred the position at the user rear, and adopted ankle 4 is during with its tiptoe kiss the earth 9, at this moment, the active force A direction of ground 9 and the tiptoe of adopted ankle 4 and three-line machine c ' can level off to plumbness gradually, when the active force A direction of ground 9 and adopted ankle 4 and three-line machine c ' reach plumbness, the active force A that is equal to ground 9 and adopted ankle 4 exerts pressure to three-line machine c ' with horizontal direction, this active force A just can break through the critical point of the 3rd pivot 2c and the 4th pivot 2d, make the 3rd pivot 2c and the 4th pivot 2d state that unlocks, and the interlock first pivot 2a and the second pivot 2b are with the pivot of portion, again because first connecting rod 21, second connecting rod 22, third connecting rod 23, the 4th connecting rod 24, help to stretch between connecting rod 251 and the interlock post 252 and articulate mutually, so second connecting rod 22 can draw first connecting rod 21, third connecting rod 23, the 4th connecting rod 24, help and stretch the related generation pivot start of connecting rod 251 and interlock post 252, make and hold mat quadric chain 2 between tube 1 and the adopted lower limb 3 and the bending of energy nature, so, user just can be smoothly with this utility model of back brace forward swing once again, during forward swing, because spring 253 pushing and withstanding interlock posts 252 are stretched in helping in the restoring cylinder 250 of the resetting means 25 of quadric chain 2, make to help and stretch connecting rod 251, first connecting rod 21, second connecting rod 22, third connecting rod 23 and the 4th connecting rod 24 are related is pushed against and follows its articulated section and change and put back original position, so, hold tube 1 and adopted lower limb 3 and just replys and stretch shape, and continue the walking do action of kiss the earth 9 supports.

The unsettled stage of this utility model adopted lower limb in the walking action can not produce irregular rocking, and enough support forces are arranged when contacting to earth; The smooth degree of walking and the soft property of swing are also splendid, make user need not expend too many muscle power in use, and in the action of walking, the nature and attractive in appearance that also seems, the attenuating user is fallen and is caused injured probability.

Fig. 8 and Fig. 9 also can be applied to the joint component of the limbs appliance 5 of limbs disabled use for showing the kneed quadric chain 2 of justice of the present utility model, particularly are applicable to the appliance that the lower limb disabled uses; Described appliance 5 includes and is connected in thigh and holds tube 51 and hold the upper support bar 511 and lower support bar 521 of tube 52 both sides with shank, wherein, be connected with the quadric chain 2 of the 4th connecting rod 24 with the aforementioned first connecting rod 21, second connecting rod 22, third connecting rod 23 of comprising between the upper support bar 511 of one side and the lower support bar 521, the upper support bar 511 of opposite side is connected with general pivot joint joint 6 with lower support bar 521; By aforesaid quadric chain 2, the disabled of the person's of wearing appliance 5 is in the walking action, appliance 5 can not produce irregular rocking in the unsettled stage, enough support forces are arranged when contacting to earth, the soft property of smooth degree, the swing of walking is splendid, need not expend too many muscle power, walking action nature, attractive in appearance also can reduce the injured probability of falling.

The above only is in order to explain preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to this utility model according to this; therefore; all have in that identical creation spirit is following do relevant any modification of the present utility model or change, all must be included in the category of this utility model intention protection.

Claims

1. adopted knee joint, include a quadric chain, one is located at the tube that holds of this four connecting rods machine, one flexibly connects this quadric chain and rubber-like resetting means, the adopted lower limb that is connected this quadric chain with one, described quadric chain includes a first connecting rod, one second connecting rod, one third connecting rod and one the 4th connecting rod, first end of this first connecting rod and first end of this second connecting rod articulate with one first pivot, second end of this first connecting rod and second end of the 4th connecting rod articulate with one second pivot, first end of this second connecting rod and second end of this third connecting rod articulate with one the 3rd pivot, first end of this third connecting rod and second end of this second connecting rod articulate with one the 4th pivot, it is one first online that described first pivot and second pivot are linked to be, it is one second online that described second pivot and the 3rd pivot are linked to be, described the 3rd pivot and the 4th pivot are linked to be a three-line machine, described the 4th pivot and first pivot are linked to be a tetrad machine, it is characterized in that:

Described the 4th pivot and this resetting means help with one stretches the connecting rod flexible connection, described resetting means acts on the 4th pivot and action of gravity by its elastic force and when making this quadric chain be expanded to limit state, this first online and second online angle are 20 °～25 °, this second online and angle three-line machine are 157 °～162 °, the angle of this three-line machine and tetrad machine is 96 °～100 °, and this tetrad machine and the first online angle are 77 °～81 °.

2. adopted knee joint as claimed in claim 1 is characterized in that, described resetting means includes one and is provided with and helps the pneumatic cylinder of stretching spring.

3. adopted knee joint as claimed in claim 1 is characterized in that, described resetting means includes one and is provided with and helps the oil hydraulic cylinder of stretching spring.