CN201260708Y

CN201260708Y - Buffering type artificial hip joint

Info

Publication number: CN201260708Y
Application number: CN 200820127504
Authority: CN
Inventors: 陈汉文; 宋小军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-11
Filing date: 2008-07-22
Publication date: 2009-06-24
Anticipated expiration: 2018-07-22

Abstract

The utility model relates to a buffering type artificial hip joint which comprises a handle body (1), a joint neck (2) and a femur head (3), wherein the joint neck (2) is arranged in a cylindrical step-shaped slotted hole (11) of the handle body, the joint neck (2) is a rod which is provided with a cylindrical step-shaped through hole (21) with two large ends and a small middle part, a taper sleeve (4) is tightly matched in the slotted hole (11), the upper end surface of the taper sleeve (4) is provided with two long slots (41) which can clamp two lugs (22) of the joint neck (2), the head of the joint neck (2) is provided with a protecting cover (5), a screw rod (6) is arranged in the step-shaped through hole (21), the head of the screw rod (6) is clamped on a first step (211) of the step-shaped through hole, the lower part of the screw rod is fixedly connected with lower screw threads (42) of an inner cavity of the taper sleeve (4), and a spring or an elastic silicone pipe (7) is sheathed on the screw rod (6) arranged between the lower surface of a second step (212) of the step-shaped through hole and the bottom of the inner cavity of the taper sleeve (4). The buffering type artificial hip joint has hip joint buffering and bounding function of a human body.

Description

The buffer-type artificial hip joint

Technical field

This utility model relates to a kind of artificial joint, refers to a kind of buffer-type artificial hip joint especially.

Background technology

Artificial hip joint is to be used for the treatment of artificial replacement joint commonly used such as femur head necrosis, fracture of femoral neck, and normal hip joint has one deck periosteum between femoral head and acetabular bone, and the periosteum role is to increase elasticity and wear-resistant.The acetabular bone of original sclerotin is replaced by the manual acetabulum that ultra high molecular polyethylene is processed into behind the implantable artificial hip joint.Femoral head is replaced by the head that cobalt-based materials processing becomes, and has so just formed ferrule and the supra polymer acetabular bone moves mutually.As shown in Figure 1, existing artificial hip joint is made up of hip joint stalk 1 ' and femoral head 2 ', hip joint stalk 1 ' is made of handle body 11 ' and joint neck 12 ' one, the other end of joint neck 12 ' is installed femoral head 2 ', the shortcoming that this kind artificial hip joint is deposited is: because handle body 11 ' and joint neck 12 ' are fixed together, make this artificial hip joint not have the effect of human body periosteum, promptly do not have elasticity yet and reduce anti abrasive function, user can only be walked by it, and realizes that race jumping adaptability of function is very poor.

The utility model content

The purpose of this utility model is to provide a kind of buffer-type artificial hip joint, and it has human hip buffering spring function.

To achieve these goals; technical solution of the present utility model is: a kind of buffer-type artificial hip joint; comprise the handle body; joint neck and femoral head; the joint neck is installed in the slotted eye on handle body top; the head of joint neck is fixed in the hole of femoral head bottom; wherein said slotted eye is up big and down small cylindric shoulder hole; described joint neck is the inner bar that is provided with the big middle small column shape ladder hole in two ends; described slotted eye inner chamber tight fit has tapered sleeve; described tapered sleeve upper surface offers two elongated slots that fix two lugs in neck middle part, joint downwards; described joint neck and head is plugged with over cap; be plugged with screw rod in the ladder hole of described joint neck; screw head is stuck in above the first step of ladder hole; the screw thread of its underpart and tapered sleeve inner chamber bottom is spirally connected fixing, is with spring or flexible silicon sebific duct below the second step of described ladder hole and on the screw rod between the tapered sleeve intracavity bottom.

This utility model buffer-type artificial hip joint, wherein the tapered sleeve top in described slotted eye is provided with conical seal ring.

This utility model buffer-type artificial hip joint, wherein said sealing ring is made by politef.

This utility model buffer-type artificial hip joint, wherein said tapered sleeve outer surface is up big and down small taper surface, its tapering is the 1-2 degree.

This utility model buffer-type artificial hip joint, the distance of wherein said joint neck distance from bottom tapered sleeve bottom is 3mm.

After adopting such scheme, the motionless flexible each other activity that is improved to that between original joint neck and handle body, interfixes of this utility model buffer-type artificial hip joint, make artificial hip joint more near the hip joint of human body self, user not only can be walked, and can strengthen race jumping function, improved replacement hip joints patient's quality of life.

Description of drawings

Fig. 1 is the structural representation of existing artificial hip joint;

Fig. 2 is the structural representation of this utility model buffer-type artificial hip joint.

The specific embodiment

See also the structural representation of shown in Figure 2 the novel buffer-type artificial hip joint of reality, it comprises handle body 1, joint neck 2 and femoral head 3, joint neck 2 is installed in the slotted eye 11 on handle body 1 top, slotted eye 11 is up big and down small cylindric shoulder hole, joint neck 2 is the inner bar that is provided with the big middle small column shape ladder hole 21 in two ends, and the head of joint neck 2 is fixed in the hole of femoral head 3 bottoms.

Tight fit has tapered sleeve 4 in the slotted eye 11 of handle body 1, and tapered sleeve 4 outer surfaces are up big and down small taper surface, and its tapering is 1 degree, and it can guarantee that tapered sleeve 4 is fixed in the slotted eye 11 of handle body 1.The inner chamber of tapered sleeve 4 cooperates with joint neck 2 bottoms, the upper surface of tapered sleeve 4 offers two elongated slots 41 that fix two set lugs 22 of corresponding both sides, neck 2 middle parts, joint downwards along axial line, not tapered sleeve 4 rotations relatively of joint neck 2 of tapered sleeve 4 inner chambers have been guaranteed to be placed on like this, tapered sleeve 4 tops in the slotted eye 11 are provided with conical seal ring 8, and sealing circle 8 is made by politef.Sealing circle 8 plays and makes sealing and lubricated effect between joint neck 2 and the handle body 1; neck 2 heads in joint are plugged with over cap 5; be plugged with a screw rod 6 in the ladder hole 21 of joint neck; screw rod 6 heads are stuck in above the first step 211 of ladder hole 21; the screw thread 42 of screw rod 6 bottoms and tapered sleeve 4 inner chamber bottoms is spirally connected fixing; because tapered sleeve 4 is fixed in the slotted eye 11; therefore screw rod 6 also is fixed in the slotted eye 11, is with a spring 7 below the second step 212 of ladder hole 21 and on the screw rod 6 between tapered sleeve 4 intracavity bottoms.The distance of joint neck 2 distance from bottom tapered sleeves 4 bottoms is 3mm, and the elasticity range of activity of spring on screw rod 6 is 3mm, and joint neck 2 can only move up and down under the situation that screw rod can not rotate relatively, and range of activity is 3mm.Spring 7 can be replaced by the flexible silicon sebific duct herein.

Have cartilage layers between the human synovial surface of bone; can make the joint when motion, have the effect of damping and bounce-back; the mechanical characteristic and the harmony of motion have been improved greatly; this utility model is by inserting 2 activities of joint neck in the tapered sleeves 4 in the handle bodies 1; mounting spring in the tapered sleeve 4; joint neck 2 and tapered sleeve 4 can form relative motion like this; play buffering; the effect of damping; in order to prevent the movable part rotation; anti-rotation lug 22 in the hole 41 that is inserted in tapered sleeve 4 is installed on the neck of joint; the junction of this extrinsic articulation neck 2 and handle body 1 is provided with sealing ring 8; over cap 5 is established at the top, has so just formed a telescopic elastic device, and its stroke is 3mm; reach starting and fallen the step easily easily; reduce and impact; reduce sick the damage, promptly can walk; run and jump.It more needs near the motion of human body, has changed the too inflexible defective of traditional articular prosthesis, has improved the function of use of prosthese.

The above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from this utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.

Claims

1; a kind of buffer-type artificial hip joint; comprise handle body (1); joint neck (2) and femoral head (3); joint neck (2) is installed in the slotted eye (11) on handle body (1) top; the head of joint neck (2) is fixed in the hole of femoral head (3) bottom; it is characterized in that: described slotted eye (11) is up big and down small cylindric shoulder hole; described joint neck (2) is provided with the bar of the big middle small column shape ladder holes in two ends (21) for inside; described slotted eye (11) inner chamber tight fit has tapered sleeve (4); described tapered sleeve (4) upper surface offers two elongated slots (41) that fix joint neck (2) two lugs in middle part (22) downwards; described joint neck (2) head is plugged with over cap (5); be plugged with screw rod (6) in the ladder hole (21) of described joint neck; screw rod (6) head is stuck in above the first step (211) of ladder hole (21); the screw thread (42) of its underpart and tapered sleeve (4) inner chamber bottom is spirally connected fixing, is with spring or flexible silicon sebific duct (7) below the second step (212) of described ladder hole (21) and on the screw rod (6) between tapered sleeve (4) intracavity bottom.

2, buffer-type artificial hip joint as claimed in claim 1 is characterized in that: tapered sleeve (4) top in described slotted eye (11) is provided with conical seal ring (8).

3, buffer-type artificial hip joint as claimed in claim 2 is characterized in that: described sealing ring (8) is made by politef.

4, buffer-type artificial hip joint as claimed in claim 3 is characterized in that: described tapered sleeve (4) outer surface is up big and down small taper surface, and its tapering is the 1-2 degree.

5, buffer-type artificial hip joint as claimed in claim 4 is characterized in that: the distance of described joint neck (2) distance from bottom tapered sleeve (4) bottom is 3mm.