阅读说明：本技术 一种髋臼杯 (Acetabular cup ) 是由 季方秋 张春雨 陈贤帅 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种髋臼杯,包括主体结构、盖体和活动球体,所述主体结构的顶面设有开口向上的腔体,其内壁设有多个滚珠；所述活动球体设在所述腔体内；盖体,所述盖体与所述腔体的顶面可拆卸连接,所述盖体上对应所述腔体的位置设有通孔,其中,所述活动球体从所述通孔外漏出所述盖体,所述活动球体外漏出所述盖体的部分上设置有连接孔。本发明采用组合式结构设计的髋臼杯,将主体结构、盖体及活动球体进行组合,在应用于髋关节置换手术后,髋臼杯中的活动球体与滚珠发生滚动,并与主体结构及盖体的协同工作下,使得关节活动,由于该过程中为滚动摩擦,所产生的摩擦力较滑动摩擦大大减小,从而增加了关节的使用寿命。(The invention discloses an acetabular cup, which comprises a main body structure, a cover body and a movable sphere, wherein the top surface of the main body structure is provided with a cavity with an upward opening, and the inner wall of the main body structure is provided with a plurality of balls; the movable ball body is arranged in the cavity; the cover body is detachably connected with the top surface of the cavity, a through hole is formed in the position, corresponding to the cavity, of the cover body, the movable ball body leaks out of the cover body from the through hole, and a connecting hole is formed in the part, leaking out of the movable ball body, of the cover body. The invention adopts the acetabulum cup with combined structural design, combines the main body structure, the cover body and the movable ball body, and after the acetabulum cup is applied to hip joint replacement surgery, the movable ball body in the acetabulum cup rolls with the ball bearing and works with the main body structure and the cover body in a coordinated manner to enable the joint to move.)

1. An acetabular cup, comprising:

the top surface of the main body structure is provided with a cavity with an upward opening, and the inner wall of the main body structure is provided with a plurality of balls;

the movable ball body is arranged in the cavity;

the cover body is detachably connected with the top surface of the cavity, a through hole is formed in the position, corresponding to the cavity, of the cover body, the movable ball body leaks out of the cover body from the through hole, and a connecting hole is formed in the part, leaking out of the movable ball body, of the cover body.

2. The acetabular cup of claim 1 wherein the distance d from the outer wall of the movable sphere to the inner wall of the cavity is the distance from rollThe radius r of the bead satisfies:

3. the acetabular cup of claim 1 wherein the body structure is hemispherical, the split ring of the cavity being provided with a boss around the outer side of which is provided with an external thread.

4. The acetabular cup of claim 3, wherein a groove is formed in the bottom surface of the cover body, a through hole is formed in the top surface of the groove in the vertical direction, and an internal thread is formed in the inner side wall of the groove and is matched with the external thread.

5. The acetabular cup of claim 1 wherein the outer wall of the body structure is a roughened wall.

6. The acetabular cup of claim 1, wherein the inner wall of the body structure is a smooth-walled surface.

7. The acetabular cup of claim 1 wherein the outer side of the cap is provided with a mounting block, the mounting block having a mounting hole.

8. The acetabular cup of claim 1 wherein the through hole is circular, and wherein both the upper and lower edges of the through hole are chamfered.

9. The acetabular cup of claim 1 wherein the outer surface of the movable sphere is a smooth walled surface.

10. The acetabular cup of claim 1 wherein an inner wall of the attachment hole is provided with an internal gear.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an acetabular cup.

Background

Hip replacement has become a reliable treatment modality over the years of clinical practice. Wherein, the total hip replacement needs the acetabulum cup to be matched with the femoral stem for use, so as to meet the movement requirement of the joint of the patient. In the prior art, the joint matching mode simulates a natural hip joint, namely, the mortar cup and a ball body on the femoral stem move through sliding. Because the existence of sliding friction in the sliding process, the mortar cup is very easily damaged with the face of spheroid contact to influence articular life, simultaneously, long-time sliding friction can cause the mortar cup to take place the material with the spheroid surface and drop and produce the piece, thereby these pieces very easily cause human inflammation to lead to the joint of implantation to take place to become flexible. In addition, because the stability of the combination of the acetabular cup and the femur is not high, dislocation accidents are easy to happen due to looseness, and collision damage and abnormal sound are easy to generate.

At present, the service life of the joint is prolonged by adopting wear-resistant materials for the acetabular cup and the ball body, and the acetabular cup and the ball body are high in cost and complex to process.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the acetabular cup, the joint moves in a rolling mode by designing the rolling bearing in the acetabular cup, so that sliding friction is changed into rolling friction, the friction resistance is greatly reduced, and the service life of the joint is prolonged. Meanwhile, the acetabular cup disclosed by the invention can be tightly connected with the femoral stem, so that the stability of the hip joint in the movement process is ensured, and the occurrence of dislocation accidents is reduced.

An acetabular cup according to an embodiment of the invention includes:

the top surface of the main body structure is provided with a cavity with an upward opening, and the inner wall of the main body structure is provided with a plurality of balls;

the movable ball body is arranged in the cavity;

the cover body is detachably connected with the top surface of the cavity, a through hole is formed in the position, corresponding to the cavity, of the cover body, the movable ball body leaks out of the cover body from the through hole, and a connecting hole is formed in the part, leaking out of the movable ball body, of the cover body.

The acetabular cup disclosed by the embodiment of the invention at least has the following beneficial effects:

the acetabulum cup with combined structural design combines the main body structure, the cover body and the movable ball body, and after being applied to hip joint replacement surgery, the movable ball body in the acetabulum cup rolls with the ball bearing and works with the main body structure and the cover body in a coordinated manner to enable the joint to move.

According to some embodiments of the invention, the distance d from the outer wall of the movable sphere to the inner wall of the cavity and the radius r of the ball are such that:

the balls are uniformly distributed and closely arranged, are single-layer and are prevented from being stacked.

According to some embodiments of the invention, the main body structure is hemispherical, the opening of the cavity is surrounded by a boss, and the outer side surface of the boss is provided with an external thread.

According to some embodiments of the invention, the bottom surface of the cover body is provided with a groove, the top surface of the groove is provided with a through hole along the vertical direction, the inner side wall of the groove is provided with an internal thread, and the internal thread is matched with the external thread.

According to some embodiments of the invention, the outer wall of the body structure is a rough wall surface, so that the acetabular cup is convenient to attach to bone.

According to some embodiments of the invention, the inner wall of the main body structure is a smooth wall surface, so that the rolling of the balls is facilitated, and the friction is reduced.

According to some embodiments of the invention, the outer side of the cover body is provided with a mounting block, and the mounting block is provided with a mounting hole for mounting and retaining the acetabular cup in the acetabular socket.

According to some embodiments of the present invention, the through hole is circular, and the number of contact points between the circular through hole and the movable ball is more, so that the movable ball is more stably connected to the through hole when leaking out of the cover body from the through hole, and the upper edge and the lower edge of the through hole are both provided with chamfers, thereby reducing friction between the movable ball and the through hole when rolling.

According to some embodiments of the present invention, the outer surface of the movable ball is a smooth wall surface, so as to further reduce friction between the movable ball and the balls when the movable ball rolls.

According to some embodiments of the invention, the inner wall of the connecting hole is provided with an inner gear which is matched with an outer gear of the femoral stem in the hip replacement operation for fixation, so that the acetabular cup and the femoral stem can be tightly connected, the stability of the hip joint in the movement process is ensured, and the occurrence of dislocation accidents is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a main structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a cover according to an embodiment of the present invention;

FIG. 3 is a front view of a movable sphere of an embodiment of the present invention;

FIG. 4 is a top view of a movable sphere according to an embodiment of the present invention

FIG. 5 is a schematic cross-sectional view of an assembled acetabular cup according to embodiments of the invention;

a main body structure 100, a boss 110, a ball 120,

A cover body 200, a through hole 210, an installation block 220, an installation hole 221,

Movable sphere 300, connecting hole 310, inner gear 311.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.