CN109199653B

CN109199653B - Artificial limb foot

Info

Publication number: CN109199653B
Application number: CN201811171590.9A
Authority: CN
Inventors: 翁文辉; 李静; 杨旭生
Original assignee: Guangdong Lanwan Intelligent Technology Co ltd
Current assignee: Suzhou Infinite 3d Technology Industry Co ltd
Priority date: 2018-10-09
Filing date: 2018-10-09
Publication date: 2020-07-21
Anticipated expiration: 2038-10-09
Also published as: CN109199653A

Abstract

The invention relates to the technical field of artificial limbs, in particular to an artificial foot. This prosthetic foot imitates sufficient structure, sets up resilience torsional spring part in ankle department, and resilience torsional spring part provides the holding power and guarantees the normal stand of patient in the use for the bearing bolster. When walking, the bearing bolster leans forward around the support fulcrum, and resilience torsional spring part receives the compression of bigger pressure, provides bigger bounce for the bearing bolster, and elasticity footboard is crooked, and resilience torsional spring part and elasticity footboard provide forward thrust simultaneously and give the foot connecting piece, and dynamics when reducing walking or running reaches laborsaving effect. In order to eliminate the elasticity of the rebounding torsion spring component when the artificial limb foot is lifted, the inner surface and the outer surface of the torsion spring and one side of the rebounding device, which is close to the rebounding component of the torsion spring, are provided with one-way friction buffering grains, so that the phenomenon that the rebounding force of the rebounding torsion spring component is too large to generate instant pedaling force to cause muscle damage is avoided. The artificial limb foot has the advantages of simple structure, convenient use, low manufacturing cost and suitability for popularization.

Description

Artificial limb foot

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of artificial limbs, in particular to an artificial foot.

[ background of the invention ]

The main function of the artificial limb is to replace part of the lost limb function, so that the amputee can recover certain self-care and working abilities. The suitable object is amputee caused by diseases, traffic accidents, industrial accidents, sports injuries and the like. The artificial limb foot is suitable for a foot amputation patient, and in order to recover the mobility and balance ability of the patient, the traditional artificial limb foot mostly adopts a hydraulic or electric mode to realize the functional action of the artificial limb, but the artificial limb is high in manufacturing cost and is not beneficial to popularization. The artificial limb in a hydraulic or electric mode has a complex structure and short service life, is difficult to recover once the components are damaged, and greatly influences the use of a patient. In addition, the traditional artificial limb is heavy, imbalance between the body and the artificial limb is easily caused, the skeleton of a user can deform after long-time use, and the using effect of the artificial limb is influenced. The artificial limb is also manufactured by using a spring structure, but the conventional artificial limb with the spring structure cannot eliminate the strength of the spring when the spring rebounds, and the leg is easily damaged by the pedaling force of the spring when the leg is rebounded during walking or running.

[ summary of the invention ]

The invention aims to provide an artificial limb foot which has simple structure, convenient use and light weight and can eliminate the elasticity of a rebound torsion spring in time.

In order to achieve the above purpose, the artificial foot of the invention comprises a foot connecting piece 10 used for connecting with a lower leg part, wherein the foot connecting piece 10 is fixed on a bearing buffer piece 20 through a connecting rod 11, the bearing buffer piece 20 is fixed on a heel piece 30 and rotates by taking the heel piece 30 as a fulcrum, an elastic foot plate 50 is also fixedly connected on the heel piece 30, and an elastic blocking device 40 is arranged on the elastic foot plate 50; the shock-proof device comprises a bearing buffer member 20, a heel member 30 and a shock-proof device 40 which are enclosed to form a non-closed space, wherein a rebound torsion spring part 70 is further hoisted on the connecting rod 11, the rebound torsion spring part 70 is hoisted in the non-closed space and is respectively provided with a gap of 1-2 mm with the bearing buffer member 20, the heel member 30 and the shock-proof device 40.

Further, the rebound torsion spring component 70 is hoisted below the load-bearing buffer 20, the end of the connecting rod 11 is provided with a torsion spring support 60, and the rebound torsion spring component 70 is supported on the connecting rod 11 by the torsion spring support 60.

Furthermore, a supporting pivot 31 is arranged on the heel member 30, the load-bearing cushion member 20 is fixed on the supporting pivot 31, and the load-bearing cushion member 20 can rotate around the supporting pivot 31.

Further, the position rotation limiting groove 21 is formed in the load bearing cushion 20 near the support pivot 31, and the position rotation limiting groove 21 limits the rotation angle of the load bearing cushion 20 relative to the heel member 30.

Further, the springback torsion spring part 70 is formed by sleeving a plurality of torsion springs 71 which are identical in shape and different in size, and a gap of 1-2 mm is formed between every two adjacent torsion springs 71.

Further, the shape of the torsion spring 71 is non-closed, and the deformation reserving opening 32 is arranged at the position of the torsion spring 71 close to the heel member 30.

Further, the torsion spring support 60 supports the innermost torsion spring 71.

Further, the inner surface and the outer surface of the torsion spring 71 are provided with one-way friction buffering threads 72.

Furthermore, a one-way friction buffering grain 72 is also arranged on one surface of the bullet-proof device 40 close to the rebounding torsion spring part 70.

Further, the elastic foot plate 50 is made of elastic steel or carbon fiber.

The invention provides a prosthetic foot which is similar to a foot structure, a rebound torsion spring part is arranged at an ankle part, and the rebound torsion spring part provides supporting force for a bearing buffer piece to ensure that a patient stands normally in the using process. When walking, the bearing bolster leans forward around the support fulcrum, and resilience torsional spring part receives the compression of bigger pressure, provides bigger bounce for the bearing bolster, and elasticity footboard is crooked, and resilience torsional spring part and elasticity footboard provide forward thrust simultaneously and give the foot connecting piece, and dynamics when reducing walking or running reaches laborsaving effect. In order to eliminate the elasticity of the rebounding torsion spring component when the artificial limb foot is lifted, the inner surface and the outer surface of the torsion spring and one side of the rebounding device, which is close to the rebounding component of the torsion spring, are provided with one-way friction buffering grains, so that the phenomenon that the rebounding force of the rebounding torsion spring component is too large to generate instant pedaling force to cause muscle damage is avoided. The artificial limb foot has the advantages of simple structure, convenient use, low manufacturing cost and suitability for popularization.

[ description of the drawings ]

Fig. 1 is a side view of the prosthetic foot of the invention.

Fig. 2 is a perspective view of the prosthetic foot of the invention.

Fig. 3 is a perspective view of another embodiment of the prosthetic foot of the invention.

Fig. 4 is a schematic view of the prosthetic foot of the present invention with the resilient torsion spring member removed.

FIG. 5 is a schematic view of the elastic foot plate of the artificial foot of the invention when walking.

FIG. 6 is a schematic view of the resilient torsion spring member under force when the prosthetic foot of the present invention is walking.

Fig. 7 is an exploded view of the resilient torsion spring member and the ballistic resistant member of the prosthetic foot of the present invention.

[ detailed description ] embodiments

The following examples are further illustrative and supplementary to the present invention and do not limit the present invention in any way.

Example 1

As shown in fig. 1-7, the prosthetic foot of this embodiment includes a foot connecting member 10 for connecting with a lower leg member, the foot connecting member 10 is fixed on a load-bearing buffer member 20 through a connecting rod 11, the load-bearing buffer member 20 is fixed on a heel member 30 and rotates with the heel member 30 as a pivot, an elastic foot plate 50 is further fixedly connected to the heel member 30, and an elastic resistance device 40 is installed on the elastic foot plate 50; the shock-proof device comprises a bearing buffer member 20, a heel member 30 and a shock-proof device 40 which are enclosed to form a non-closed space, wherein a rebound torsion spring part 70 is further hoisted on the connecting rod 11, the rebound torsion spring part 70 is hoisted in the non-closed space and is respectively provided with a gap of 1-2 mm with the bearing buffer member 20, the heel member 30 and the shock-proof device 40.

The foot connecting piece 10 is used for connecting the artificial foot with the lower leg part, a connecting rod 11 is arranged on the foot connecting piece 10, the connecting rod 11 is connected to the bottom of the foot connecting piece 10, the connecting rod 11 is fixed on a bearing buffer piece 20, the bearing buffer piece 20 can rotate in a small range relative to the heel piece 30, and under the condition that the artificial foot is suspended, the rotating position of the bearing buffer piece 20 relative to the heel piece 30 is limited to keep the elastic foot plate 50 and the foot connecting piece 10 vertical. When the stand normally, the pressure that foot connecting piece 10 received the shank pushes down, leads to bearing bolster 20 bearing to push down, and bearing bolster 20 below is provided with resilience torsional spring part 70, and resilience torsional spring part 70 receives the deformation shrink of pressure time to provide the resilience force simultaneously and give bearing bolster 20, support bearing bolster 20. The resilient torsion spring member 70 is disposed in the non-enclosed space formed between the load bearing bumper 20, the heel member 30 and the bullet stop 40, and the heel member 30 and the bullet stop 40 together provide a counter-supporting force to the resilient torsion spring member 70 when the resilient torsion spring member 70 is subjected to a compressive force. When walking, because the angle formed between the foot connecting piece 10 and the elastic foot plate 50 is smaller, the pressure applied to the springback torsion spring part 70 is larger, and the springback force given by the springback torsion spring part 70 is also larger, so that the forward thrust during walking can be provided, and the effect of saving labor during walking or running is achieved. The resilient foot plate 50 also flexes to rebound during walking and provides a forward thrust in conjunction with the resilient torsion spring member 70. Gaps of 1-2 mm are reserved among the bearing buffer piece 20, the heel piece 30 and the elastic resistance device 40, so that the artificial foot is more attractive, meanwhile, the bearing buffer piece 20, the heel piece 30 and the elastic resistance device 40 can be prevented from constantly pressing the rebound torsion spring component 70, and the service life of the rebound torsion spring component 70 is prolonged.

Example 2

As shown in fig. 1 to 6, the connection mode of the load-bearing buffer 20 on the connecting rod 11 is completed in this embodiment, the resilient torsion spring member 70 is hoisted below the load-bearing buffer 20, the end of the connecting rod 11 is provided with a torsion spring support 60, and the torsion spring support 60 supports the resilient torsion spring member 70 on the connecting rod 11. The torsion spring support 60 supports the resilient torsion spring member 70, and ensures that the resilient torsion spring member 70 is stably placed in the non-closed space formed by the load-bearing bumper 20, the heel member 30 and the spring stopper 40.

Example 3

As shown in fig. 1-6, this embodiment completes the rotation structure of the load-bearing cushion 20 relative to the heel member 30, the heel member 30 is provided with a supporting fulcrum 31, the load-bearing cushion 20 is fixed on the supporting fulcrum 31, and the load-bearing cushion 20 can rotate around the supporting fulcrum 31. The position of the load bearing cushion 20 near the support pivot 31 is provided with a position rotation limiting groove 21, and the position rotation limiting groove 21 limits the rotation angle of the load bearing cushion 20 relative to the heel member 30. The load bearing bumper 20 is capable of a small amount of rotation about the fulcrum 31, and the rotational position of the load bearing bumper 20 relative to the heel member 30 defines the vertical orientation of the resilient foot plate 50 and the foot link 10 in the suspended condition of the prosthetic foot. In the case of a prosthetic foot that is stressed, the rotation-defining socket 21 defines an angle between the resilient foot plate 50 and the foot link 10 of between 50 and 90 degrees.

Example 4

As shown in fig. 1, 2, 3, 5, 6 and 7, the resilient torsion spring member 70 is formed by sleeving a plurality of torsion springs 71 with the same shape and different sizes, and a gap of 1-2 mm is provided between the adjacent torsion springs 71. The shape of the torsion spring 71 is non-closed, and the position of the torsion spring 71 close to the heel member 30 is provided with a deformation reserved opening 32. The torsion spring support 60 supports the innermost torsion spring 71. The structure of the springback torsion spring part 70 is perfected in the embodiment, and the springback torsion spring part 70 is formed by sleeving a plurality of torsion springs 71 which are identical in shape and different in size. When the torsion spring 71 at the outermost layer is stressed and deformed, the torsion spring 71 at the inner layer is pressed to deform, and meanwhile, rebound force is provided, so that rebound force is larger, the artificial limb foot is suitable for various stress states, permanent deformation caused by sudden large force bearing of the rebound torsion spring component 70 is avoided, the service life of the rebound torsion spring component 70 is prolonged, and meanwhile, the number of the torsion springs 71 can be increased or reduced for people with different weights. A gap of 1-2 mm is arranged between the adjacent torsion springs 71, so that the stressed structures are hierarchically distinguished. And the torsion spring 71 is provided with the deformation reserving opening 32, and the deformation reserving opening 32 ensures that the torsion spring 71 can still continue to deform 71 when the torsion spring 71 is slightly deformed by stress, thereby providing larger rebound force.

Example 5

As shown in fig. 7, both the inner and outer surfaces of the torsion spring 71 are provided with one-way friction cushioning stripes 72. The surface of the bullet-proof device 40 near the rebound torsion spring part 70 is also provided with a one-way friction buffering grain 72. In order to avoid resilience torsional spring part 70 resilience force too big, lead to pedaling the big muscle of damage of power in twinkling of an eye, this embodiment sets up one-way friction buffering line 72 at torsional spring 71's internal surface and surface, one-way friction buffering line 72 can produce the friction when deformation will return to normal condition at torsional spring 71, the resilience dynamics when slowing down torsional spring 71 and kick-backing, it cushions line 72 also to be provided with one-way friction on the bullet resistance device 40, when resilience torsional spring part 70 kick-backs, because one-way friction buffering line 72's effect, also can slow down rebound speed, avoid pedaling the power too big in twinkling of an eye and cause muscle damage.

Although the present invention has been described with reference to the above embodiments, the scope of the present invention is not limited thereto, and modifications, substitutions and the like of the above members are intended to fall within the scope of the claims of the present invention without departing from the spirit of the present invention.

Claims

1. A prosthetic foot comprising a foot link (10) for connection to a lower leg member, characterized in that: the foot connecting piece (10) is fixed on the bearing buffer piece (20) through a connecting rod (11), the bearing buffer piece (20) is fixed on the heel piece (30) and rotates by taking the heel piece (30) as a fulcrum, an elastic foot plate (50) is further fixedly connected on the heel piece (30), and an elastic blocking device (40) is arranged on the elastic foot plate (50);

the shock-proof device comprises a bearing buffer piece (20), a heel piece (30) and a bullet-proof device (40), wherein a non-closed space is enclosed by the bearing buffer piece (20), the heel piece (30) and the bullet-proof device (40), a rebound torsion spring part (70) is also hoisted on the connecting rod (11), the rebound torsion spring part (70) is hoisted in the non-closed space, and gaps of 1-2 mm are respectively reserved among the rebound torsion spring part (70), the bearing buffer piece (20), the heel piece (30) and the bullet-proof device (;

resilience torsional spring part (70) the same by a plurality of root shapes, torsional spring (71) of different sizes cup joint and form, be provided with 1-2 millimeter's clearance between adjacent torsional spring (71), torsional spring (71) shape be non-closed formula, torsional spring (71) are close to heel spare (30) position and are provided with deformation and reserve opening (32), torsional spring support piece (60) support torsional spring (71) of inlayer, the internal surface and the surface of torsional spring (71) all are provided with one-way friction buffering line (72), the bullet resistance device (40) one side that is close to resilience torsional spring part (70) also be provided with one-way friction buffering line (72).

2. The prosthetic foot according to claim 1, wherein: the rebound torsion spring component (70) is hoisted below the bearing buffer piece (20), the tail end of the connecting rod (11) is provided with a torsion spring supporting piece (60), and the rebound torsion spring component (70) is supported on the connecting rod (11) by the torsion spring supporting piece (60).

3. The prosthetic foot according to claim 2, wherein: the heel member (30) is provided with a supporting fulcrum (31), the bearing buffer member (20) is fixed on the supporting fulcrum (31), and the bearing buffer member (20) can rotate around the supporting fulcrum (31).

4. The prosthetic foot according to claim 3, wherein: the position of the bearing buffer piece (20) close to the supporting fulcrum (31) is provided with a position rotation limiting groove (21), and the position rotation limiting groove (21) limits the rotation angle of the bearing buffer piece (20) relative to the heel piece (30).

5. The prosthetic foot according to any of claims 1-4, wherein: the elastic foot plate (50) is made of elastic steel or carbon fiber.