CN102908214B - Acetabular cup implanter - Google Patents

Abstract

The invention relates to an acetabular cup implanter, which comprises an acetabular cup, a shell and a transmission mechanism. The driving mechanism comprises at least one driving rod and an operating rod, wherein the operating rod is angularly displaced by the pivot and comprises a forward position and a backward position, when the operating rod is located at the forward position, the driving rod is forwardly displaced, a user can rotate the operating rod to rotate the mortar cup, and when the operating rod is located at the backward position, the driving rod is rearwardly displaced to enable the mortar cup to abut against one end of the extending part to fix the mortar cup. With the structure, the invention can assist the operator to install the acetabular cup at a proper position in the acetabular bone tissue of the pelvis of the human body, and unload the acetabular cup to the installation position by rotating the operating rod and operating the operating rod, thereby being the acetabular cup implanter which has simple structure and is easy to operate according with the ergonomics.

Description

Acetabular cup implant

technical field

The invention relates to an acetabular cup implanter, in particular to an acetabular cup implanter which is simple in structure and conforms to ergonomics and is easy to operate.

Background technique

The hip joint is the junction of the acetabulum and the femoral head, and the hip joint, cartilage, synovial membrane, and fibrous capsule help to form a flexible spherical joint. Its structure is like a ball embedded in a groove, so The structure makes the hip joint have high stability to support the weight of the human body.

People need to use the hip joint as a support point to support various activities of the human body. Therefore, if the hip joint is functionally impaired due to factors such as high degree of degeneration, rheumatoid disease, trauma or disease, such as: degenerative hip arthritis, rheumatoid hip Hip diseases such as arthritis, traumatic hip arthritis, and congenital hip dysplasia are bound to greatly affect people's normal life. At this time, medical personnel are required to perform hip replacement. The acetabulum and femoral head of the joint are repaired and replaced with an artificial joint.

The total hip artificial joint (total hip artificial joint) is a very important pivoting component in hip replacement surgery, which mainly includes an acetabular cup embedded in the acetabular bone tissue of the human pelvis and an extended artificial femur. The artificial hip joint ball head (head) is composed. The artificial hip joint head (head) is installed in the installation position of the acetabular cup (acetabular cup), and passes through a wear-resistant liner between the acetabular cup (acetabular cup) and the artificial hip joint ball head (head) (liner), so that the head of the artificial hip joint can pivotally rotate in the acetabular cup to simulate the movement of the human femur in the acetabulum.

How to accurately insert the acetabular cup into the acetabular bone tissue of the human pelvis is an important topic for medical personnel. Generally speaking, the medical personnel will hold a rod-shaped acetabular cup implanter. The acetabular cup is set in a thread-locking manner. During the operation, the medical personnel insert the acetabular cup implanter into the patient's pelvic acetabular bone tissue for installation, and the acetabular cup reaches the installation position in the body. and rotate the acetabular cup implanter to unload the acetabular cup, however, the existing acetabular cup implanter not only has a complex structure, but also does not conform to ergonomics and is not easy to operate when the acetabular cup is installed, resulting in In addition to the troubles of medical staff, there is a need for improvement.

Contents of the invention

In view of the above technical problems, the main purpose of the present invention is to provide an acetabular cup implanter with simple structure, ergonomics and easy operation.

In order to achieve the above object, an acetabular cup implanter of the present invention at least includes:

An acetabular cup with a hole;

A shell, including a gripping portion and an extension portion, one end of the extension portion is used for setting the acetabular cup; and

A transmission mechanism, at least part of the transmission mechanism is arranged in the housing, including at least one transmission rod and an operating rod, one end of the transmission rod adjacent to the extension part has a connection interface connected to the hole, and the other end has a pivot shaft, the pivot is pivotally connected with the operating rod;

Wherein, the operating rod is angularly displaced by the pivot to include a forward position and a backward position. When the operating rod is in the forward position, the transmission rod is displaced forward, and the user can rotate the operating rod to rotate the socket cup, and when the operating rod is in the retreat position, the transmission rod is displaced backward so that the acetabular cup abuts against one end of the extension to fix the acetabular cup.

In a preferred embodiment, one end of the extension part has a bearing head for setting the acetabular cup, and the acetabular cup abuts against the bearing head to fix the acetabular cup.

In a preferred embodiment, the connection interface is screwed and locked to the hole.

In a preferred embodiment, the wall of the hole has a female thread, and the wall of the connection interface has a male thread.

In a preferred embodiment, the casing has at least one shaft sleeve inside, and the shaft sleeve accommodates the transmission rod.

In a preferred embodiment, the transmission rod includes: a first transmission rod, one end of which has the connecting interface; a second transmission rod, one end of which is connected to the first transmission rod by a first universal joint; a third a transmission rod, one end of which is connected to the second transmission rod by a second universal joint; a fourth transmission rod, one end of which is connected to the third transmission rod by a third universal joint; and a fifth transmission rod, one end of which is connected by A fourth universal joint is connected to the fourth transmission rod, and the other end has the pivot.

In a preferred embodiment, one end of the holding portion is connected with an end portion.

In a preferred embodiment, the end portion defines a guide hole for accommodating the operating rod.

In a preferred embodiment, one end surface of the handle portion has a pad, and the operating rod includes a cam that can abut against the pad.

Wherein, since the present invention includes a transmission mechanism, the transmission mechanism includes at least one transmission rod and an operation rod, and one end of the transmission rod adjacent to the extension part has a connection interface connected to the hole to connect the acetabular cup, and the operation The rod is pivotally connected to the other end of the transmission rod, and the operating rod includes a forward position and a backward position. From the aforementioned structure, when using the acetabular cup implanter of the present invention, firstly operate the operating rod to the forward position, at this time, the operator can rotate the operating rod to drive the rotation of the acetabular cup to adjust the acetabular cup to a proper installation Angle, after rotating the acetabular cup to an appropriate installation angle, operate the operating rod in the retreat position so that the acetabular cup abuts against the end of the extension to fix the acetabular cup so that the acetabular cup cannot be rotated. The acetabular cup is installed at the installation position in the acetabular bone tissue of the human body. After the installation is completed, the operator can operate the operating rod at the forward position to release the acetabular cup, and rotate the operating rod to unload the acetabular cup in the human body.

Wherein, when the operator uses the acetabular cup implanter of the present invention, the operation is simple and ergonomic by holding the grip portion with one hand and operating or rotating the operating rod with the other hand. Therefore, the present invention effectively solves the problem that the structure of the acetabular cup implanter in the prior art is complex and not ergonomic and difficult to operate. The acetabular cup implanter of the present invention has a simple structure and is ergonomically easy to operate. It is practical and progressive.

Description of drawings

Fig. 1 is the three-dimensional appearance view of the preferred embodiment of the acetabular cup implanter of the present invention;

Fig. 2 is a three-dimensional exploded view of each component of the preferred embodiment of the acetabular cup implanter of the present invention;

Fig. 3 is a sectional view of internal components of a preferred embodiment of the acetabular cup implanter of the present invention;

4 is a schematic diagram of a transmission rod and a universal joint of a preferred embodiment of the acetabular cup implanter of the present invention;

Fig. 5 is a first implementation schematic diagram of the transmission rod of the preferred embodiment of the acetabular cup implanter of the present invention;

Fig. 6 is the implementation schematic diagram II of the preferred embodiment of the acetabular cup implanter of the present invention with the operating rod in the forward position and the backward position;

Fig. 7 is the implementation schematic diagram III of the preferred embodiment of the acetabular cup implanter of the present invention, in which the transmission rod is displaced backwards to fix the acetabular cup; and

Fig. 8 is a fourth schematic diagram of implementation of a preferred embodiment of the acetabular cup implanter of the present invention.

[Description of main component symbols]

1 acetabular cup implant

2 cups

21 holes

3 shell

31 Grip

311 liner

32 extension

321 bearing head

322 shaft sleeve

4 transmission mechanism

41 transmission rod

411 first transmission rod

4111 first universal joint

4112 connection interface

412 second transmission rod

4121 second universal joint

413 The third transmission rod

4131 third universal joint

4132 rotating block

4133 axis

4134 perforated

414 The fourth transmission rod

4141 fourth universal joint

415 fifth transmission rod

4151 Pivot

42 joystick

421 cam

422 end

423 guide hole

Detailed ways

In order to achieve the above purpose and effects, the technical means and structures adopted by the present invention are described in detail as follows with reference to the accompanying drawings for preferred embodiments of the present invention.

Please refer to Fig. 1, Fig. 2 and Fig. 3, which are respectively a perspective view, a three-dimensional exploded view and a cross-sectional view of a preferred embodiment of the present invention. It can be clearly seen from the figures that the acetabular cup implanter 1 of the present invention includes at least: An acetabular cup 2, a shell 3 and a transmission mechanism 4.

The acetabular cup 2 is provided with a hole 21, preferably, the acetabular cup 2 can be provided with a plurality of holes 21 as required, and the wall of the hole 21 has a female thread.

The housing 3 includes a grip portion 31 and an extension portion 32, one end of the extension portion 32 is used for setting the acetabular cup 2, preferably, the outer surface of the grip portion 31 is provided with a shape for easy gripping, the grip One end surface of part 31 has a liner 311, one end of the holding part 31 is connected with an end part 422, and the extension part 32 has four bends and is slightly ㄇ-shaped, and relative to the axis of the acetabular cup 2 There is an eccentric distance, and one end of the extension part 32 has a bearing head 321 for setting the acetabular cup 2 . In addition, the casing 3 has at least one bushing 322 , and the bushing 322 is slidably and rotatably disposed in the extension portion 32 . In this embodiment, there are two bushings 322 .

The transmission mechanism 4, at least part of the transmission mechanism 4 is arranged in the housing 3, including at least one transmission rod 41 and an operation rod 42, preferably, one end of the transmission rod 41 and the operation rod 42 protrude from the housing Body 3.

One end of the transmission rod 41 adjacent to the extension portion 32 has a connection interface 4112 connected to the hole 21, and the other end has a pivot 4151, and the pivot 4151 is pivotally connected to the operating rod 42. Preferably, the transmission rod 41 is accommodated in the shaft sleeve 322, and the connection interface 4112 is screwed and locked to the hole 21. Further, the wall surface of the connection interface 4112 has a male thread to be locked to the female thread on the wall surface of the hole 21 of the acetabular cup 2. The operating rod 42 is L-shaped and one end is connected to the pivot 4151 , and one end of the operating rod 42 connected to the pivot 4151 has a cam 421 abutting against the gasket 311 .

Wherein, the end portion 422 defines a guide hole 423 for accommodating the operation rod 42 , and the operation rod 42 can be angularly displaced in the guide hole 423 by the pivot 4151 .

To further illustrate, the transmission rod 41 includes a first transmission rod 411 , a second transmission rod 412 , a third transmission rod 413 , a fourth transmission rod 414 and a fifth transmission rod 415 . One end of the first transmission rod 411 has the connection interface 4112, one end of the second transmission rod 412 is connected to the first transmission rod 411 by a first universal joint 4111, and one end of the third transmission rod 413 is connected by a second universal joint 4111. The joint 4121 is connected to the second transmission rod 412, one end of the fourth transmission rod 414 is connected to the third transmission rod 413 by a third universal joint 4131, and one end of the fifth transmission rod 415 is connected by a fourth universal joint 4141 is connected to the fourth transmission rod 414 , and the other end of the fifth transmission rod 415 has the pivot 4151 .

Please refer to Fig. 4 at the same time, which is a partial schematic diagram of a preferred embodiment of the present invention, to illustrate the transmission rod 41 and the universal joint of the present invention, to illustrate with the third transmission rod 413, the third transmission rod 413 with The second universal joint 4121 is connected to the second transmission rod 412, and the third universal joint 4131 is connected to the fourth transmission rod 414. It can be clearly seen from the figure that the universal joint includes a rotating block 4132 And an axis 4133, and the two ends of the third transmission rod 413 respectively have through holes 4134 to connect the axis 4133 and the rotating block 4132 to complete the universal joint (U-joint) structure, which is common knowledge in the technical field Readers can easily understand that when the third transmission rod 413 rotates, the first transmission rod 411 , the second transmission rod 412 , the fourth transmission rod 414 , the fifth transmission rod 415 and the operating rod 42 will also rotate.

The description in this paragraph only exemplifies the third transmission rod 413, and the interconnection of the first transmission rod 411, the second transmission rod 412, the third transmission rod 413, the fourth transmission rod 414 and the fifth transmission rod 415 The structure of the first universal joint 4111 , the second universal joint 4121 , the third universal joint 4131 and the fourth universal joint 4141 is the same as that of the universal joint (U-joint), and will not be repeated here.

Please refer to Fig. 5 at the same time, which is a schematic diagram of a preferred embodiment of the present invention. It can be clearly seen from the figure that since the present invention includes a transmission mechanism 4, the transmission mechanism 4 includes at least one transmission rod 41, the transmission rod 41 includes a first transmission rod 411, a second transmission rod 412, a third transmission rod 413, a fourth transmission rod 414 and a fifth transmission rod 415, and through the first universal joint 4111, the second million Connections are made to the joint 4121 , the third universal joint 4131 and the fourth universal joint 4141 .

The bushing 322 disposed in the casing 3 can limit the displacement of the transmission rod 41 in the casing 3 and can improve the stability of the transmission rod 41 . In this embodiment, two bushings 322 are provided.

It should be noted that, since the bushing 322 is slidably and rotatably disposed in the extension portion 32, the bushing 322 can make the transmission rod 41 perform a limited displacement in the housing 3. Moreover, the bushing 322 can be disposed on any two of the three positions of the second transmission rod 412 , the third transmission rod 413 and the fourth transmission rod 414 . In a preferred embodiment of the present invention, as shown in FIG. 5 , two bushings 322 are disposed on the second transmission rod 412 and the third transmission rod 413 , but it is not limited thereto.

Please also refer to FIG. 6 , which is the second implementation schematic diagram of the preferred embodiment of the present invention. The operating rod 42 of the acetabular cup implanter 1 of the present invention is angularly displaced by the pivot 4151 to include a forward position and a backward position. , when the operating rod 42 is in the advanced position, the transmission rod 41 is displaced forward, and the user can rotate the operating rod 42 to rotate the acetabular cup 2, and when the operating rod 42 is in the backward position, the transmission rod 41 moves toward the The acetabular cup 2 is displaced backward so that the acetabular cup 2 abuts against one end of the extension part 32 to fix the acetabular cup 2 . In this embodiment, the acetabular cup 2 abuts against the bearing head 321 to fix the acetabular cup 2 .

As can be seen from the acetabular cup implanter 1 at the top of the figure, the operating rod 42 of the present invention includes an advanced position. When using the acetabular cup implanter 1 of the present invention, first operate the operating rod 42 at the advanced position, At this time, the operator can rotate the operating rod 42 to drive and rotate the acetabular cup 2 to adjust the acetabular cup 2 to a proper installation angle.

It can be seen from the acetabular cup implanter 1 at the bottom of the figure that when the acetabular cup 2 is rotated to an appropriate installation angle, the operation rod 42 is operated at the retreat position to fix the acetabular cup 2, so that the acetabular cup 2 cannot Rotate, at this time, knock and install the acetabular cup 2 to the installation position in the human acetabular bone tissue. After the installation is completed, the operator can operate the operating rod 42 in the forward position to release the acetabular cup 2, and rotate the operation Rod 42 to unload the acetabular cup 2 from the human body.

Wherein, since the operating rod 42 has a cam 421 that can abut against the lining 311, when the operating rod 42 is pressed down from the vertical forward position to become the horizontal retreat position, the cam 421 of the operating rod 42 abuts against it. Leaning against the liner 311 on one end surface of the gripping portion 31, the transmission rod 41 is displaced backward, further causing the acetabular cup 2 to be fixed.

Please refer to Fig. 7 at the same time, which is the third implementation schematic diagram of the preferred embodiment of the present invention, which is a cross-sectional view of the partial components of the present invention. It can be clearly seen from the figure that the fixing principle of the acetabular cup 2 is due to the connection interface 4112 The wall surface has a male thread to be locked to the female thread on the wall surface of the hole 21 of the acetabular cup 2. When the transmission rod 41 moves backward, the connecting interface 4112 can be pulled until the acetabular cup 2 is stopped by the bearing head 321. At this time, the male thread on the wall of the connection interface 4112 is engaged with the female thread on the wall of the hole 21, so that the acetabular cup 2 cannot be rotated.

On the contrary, its release principle is because when the operating rod 42 is in the advanced position, the connection interface 4112 can be displaced forward, and at this time the acetabular cup 2 is separated from the bearing head 321 and the male thread on the wall of the connection interface 4112 releases the female thread on the wall of the hole 21. thread, at this moment, the operating rod 42 can be rotated to unload the acetabular cup 2 from the human body.

As shown in the figure, when the operating lever 42 is pressed down from the vertical forward position to the horizontal retreat position, it can be clearly seen that the transmission mechanism 4 has displaced a certain distance E backward, and when the transmission mechanism 4 is driven to the front connecting interface When 4112, the connecting interface 4112 is displaced backward by a certain distance D.

Please also refer to FIG. 8 , which is a schematic diagram 4 of a preferred embodiment of the present invention. It can be clearly seen from the figure that when operating the acetabular cup implanter 1 of the present invention, the holding part can be held by one hand. 31. Operate and rotate the operating lever 42 with one hand, which is easy to operate and conforms to ergonomics. Therefore, the present invention has practical progress.

Please refer to all the accompanying drawings, compared with the prior art, the present invention has the following advantages:

The acetabular cup implanter 1 of the present invention allows the operator to install the acetabular cup 2 to the installation position by rotating or operating the operating rod 42. Implantation surgery is practical and progressive.

The above descriptions are only preferred embodiments of the present invention, and should not be used to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the patent of the present invention shall fall within the scope of the patent of the present invention.

Claims (9)

1. An acetabular cup implant comprising at least: An acetabular cup with a hole; A casing, including a gripping portion and an extension portion, one end of the extension portion is used for setting the acetabular cup; and a transmission mechanism, at least part of which is arranged in the casing, including at least one transmission rod and an operating rod , one end of the transmission rod adjacent to the extension part has a connection interface connected to the hole, and the other end has a pivot, and the pivot is pivotally connected to the operating rod; It is characterized in that the operating rod is angularly displaced by the pivot to include a forward position and a backward position, when the operating rod is in the forward position, the transmission rod is displaced forward, and the user can rotate the operating rod to rotate The acetabular cup, and when the operating rod is in the retreat position, the transmission rod is displaced backward so that the acetabular cup abuts against one end of the extension part to fix the acetabular cup. 2 . The acetabular cup implanter according to claim 1 , wherein one end of the extension part has a bearing head for setting the acetabular cup, and the acetabular cup abuts against the bearing head to fix the acetabular cup. 3 . The acetabular cup implanter according to claim 1 , wherein the connecting interface is screwed and locked to the hole. 4 . 4. The acetabular cup implanter according to claim 3, wherein the wall of the hole has a female thread, and the wall of the connection interface has a male thread. 5 . The acetabular cup implanter according to claim 1 , wherein at least one sleeve is provided in the housing, and the transmission rod is accommodated in the sleeve. 5 . 6. The acetabular cup implanter according to claim 1, wherein the transmission rod comprises: a first transmission rod, one end of which has the connecting interface; A second transmission rod, one end of which is connected to the first transmission rod by a first universal joint; a third transmission rod, one end of which is connected to the second transmission rod by a second universal joint; a fourth transmission rod, one end of which is connected to the third transmission rod by a third universal joint; and A fifth transmission rod, one end is connected to the fourth transmission rod by a fourth universal joint, and the other end has the pivot. 7. The acetabular cup implanter according to claim 1, wherein one end of the holding part is connected with an end. 8. The acetabular cup implanter according to claim 7, wherein a guide hole for accommodating the operating rod is opened at the end. 9 . The acetabular cup implanter according to claim 1 , wherein an end surface of the holding portion has a liner, and the operating rod includes a cam that can abut against the liner. 10 .