Tibia tray inserting and pulling device capable of being adjusted front and back

Abstract

The utility model discloses a tibia tray plugging device capable of being adjusted front and back, which comprises a base, the base comprises a base main body, a positioning groove is arranged at the bottom of the base main body, a mounting hole is arranged at the top of the base main body, a quick connector is arranged at the mounting hole of the base main body, a guide groove which is through up and down is arranged on the base main body, and the guide groove is communicated with the positioning groove. A reverse buckle is installed at the position, located in the guide groove, of the base body, an adjusting rod connected with the reverse buckle is installed on the base body, and a spring is sleeved on the adjusting rod. According to the utility model, the joint is centered, so that the stress is more uniform, and the possibility of crushing sclerotin is reduced; the transverse adjusting rod is changed into the adjusting rod, the spring is compressed by pressing the adjusting rod to drive the L-shaped inverted buckle to move backwards, the allowance of the clamping groove of the tibia support is reserved, the adjusting rod is loosened, the L-shaped inverted buckle returns to the original position under the action of the spring and is in interference fit with the clamping groove of the tibia support, pressure is applied to the direction of the clamping groove, and the locking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a tibial tray inserter capable of adjusting front and back. Background Art

[0002] During knee replacement surgery, the tibial tray and related instruments are inserted into the tibial bone marrow. Related technologies have proposed a puller to assist in the insertion and removal of the tibial tray. Traditional tibial tray inserters (such as Figure 6 The tibial tray is composed of five parts: a lateral adjustment knob, an L-shaped undercut, a spring, a main body, and a joint. The main body has a positioning hole through which a pin passes to connect to the L-shaped undercut, acting as a guide. The left and right adjustment knobs allow the L-shaped undercut to move left and right, locking the tibial tray.

[0003] Disadvantages of traditional tibial tray inserter:

[0004] 1. The quick-connect connectors of the traditional tibial tray inserter and the universal handle are at diagonal positions. After the handles are connected, uneven force is easily applied when struck, causing the tibial tray to tilt on the tibial plateau osteotomy surface and damage the bone.

[0005] 2. The lateral adjustment design of the traditional tibial tray inserter cannot be interlocked with the tibial tray trial mold. During assembly and actual use, the tibial tray inserter is easy to slip out of the tibial tray trial mold, resulting in prolonged operation time and increased risks that may occur during the operation. Utility Model Content

[0006] The purpose of the utility model is to provide a tibial tray inserter that can be adjusted front and back to solve the problems in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tibial support inserter that can be adjusted forward and backward, comprising a base, the base comprising a base body, a positioning groove is provided at the bottom of the base body, a mounting hole is provided at the top of the base body, a quick-connect joint is installed at the mounting hole of the base body, a guide groove that passes through the base body from top to bottom, an undercut is installed at the guide groove of the base body, an adjusting rod connected to the undercut is installed on the base body, and a spring is sleeved on the adjusting rod.

[0008] Preferably, the base body and the quick-connect connector are connected via a positioning pin, and the base body is provided with a positioning hole for installing the positioning pin.

[0009] Preferably, the adjusting rod is composed of a first rod body and a second rod body, the first rod body and the second rod body are an integrated structure, the diameter of the first rod body is smaller than the diameter of the second rod body, and the spring is sleeved on the first rod body.

[0010] Preferably, the first rod body of the adjusting rod extends to the guide groove of the base, and the first rod body is connected to the undercut via a threaded connection.

[0011] Preferably, the undercut is an L-shaped undercut, and the undercut is interference fit with the slot of the tibial tray.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The joint is centered, and the force is more evenly distributed, reducing the possibility of bone damage. The base body and the quick-connect joint are designed to be separated, and when combined with the universal handle, the positioning pin passes through the positioning hole and connects to the base body to increase the strength of the joint, prevent welding fatigue failure, which may cause the joint to fall off, and increase the service life of the product.

[0014] 2. The lateral adjustment rod is changed to an adjustment rod. By pressing the adjustment rod, the compression spring drives the L-shaped buckle to move backward, leaving a margin for the tibial support slot. Release the adjustment rod, and the L-shaped buckle returns to its original position under the action of the spring, and has an interference fit with the tibial support slot, and applies pressure in the direction of the slot to achieve the locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is an exploded view of the utility model;

[0019] Figure 4 It is a structural diagram of the base of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the utility model when in use;

[0021] Figure 6 It is a structural diagram of the prior art.

[0022] In the figure: 1. Base; 2. Quick connect connector; 3. Positioning pin; 4. Spring; 5. Adjustment rod; 6. Undercut; 11. Base body; 12. Guide groove; 13. Positioning groove; 14. Positioning hole; 15. Mounting hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0024] See also Figure 1 、 Figure 2 and Figure 4 In an embodiment of the utility model, a tibial tray inserter that can be adjusted front and back includes a base 1, the base 1 includes a base body 11, a positioning groove 13 is provided at the bottom of the base body 11, a mounting hole 15 is provided at the top of the base body 11, a quick-connect connector 2 is installed at the mounting hole 15 of the base body 11, a guide groove 12 that passes through the base body 11 from top to bottom, a buckle 6 is installed at the guide groove 12 of the base body 11, an adjusting rod 5 connected to the buckle 6 is installed on the base body 11, and a spring 4 is sleeved on the adjusting rod 5; the buckle 6 adopts an L-shaped buckle 6, and the buckle 6 is interference fit with the slot of the tibial tray.

[0025] like Figure 2 、 Figure 3 and Figure 4 The base body 11 and the quick connector 2 are connected by a locating pin 3. The base body 11 is provided with a locating hole 14 for installing the locating pin 3. The base body 11 and the quick connector 2 are designed to be split, and cooperate with the universal handle. The locating pin 3 passes through the locating hole 14 and is connected to the base body 11 to increase the strength of the joint, prevent welding fatigue failure, cause the joint to fall off, and increase the service life of the product.

[0026] like Figure 3 and Figure 4When the adjusting rod 5 is pressed down, the L-shaped inverted buckle 6 is pressed down, and the L-shaped inverted buckle 6 is pressed down to move backward, thereby leaving the installation margin of the tibial support positioning slot. When the adjusting rod 5 is released, the adjusting rod 5 drives the L-shaped inverted buckle 6 to return to its original position, and the L-shaped inverted buckle 6 is interference fit with the slot at the tibial support positioning slot to achieve the locking purpose. The L-shaped inverted buckle is connected to the adjusting rod 5, and the movement of the inverted buckle 6 back and forth can be controlled by adjusting the position of the adjusting rod 5. The inverted buckle cooperates with the slot of the tibial support, and the tension applied by the spring 4 is interference fit with the tibial support positioning slot to achieve the purpose of interlocking.

[0027] The working principle of the utility model is as follows: by pressing the adjustment rod and compressing the spring, the L-shaped undercut moves backward, leaving a margin for the tibial tray slot (the distance between the L-shaped undercut and the base 1 at one end of the adjustment rod 5); when the adjustment rod is released, the L-shaped undercut returns to its original position under the action of the spring, and the lower part of the L-shaped undercut has an interference fit with the slot of the tibial tray, and pressure is applied in the direction of the slot (the distance between the L-shaped undercut and the base 1 at one end of the adjustment rod 5), thereby achieving a locking effect;

[0028] When the adjusting rod 5 is pressed, the compression spring 4 moves backward, which can drive the L-shaped inverted buckle 6 to move backward, leaving a margin for the installation of the tibial support positioning slot. When the adjusting rod 5 is released, the adjusting rod 5 drives the L-shaped inverted buckle 6 back to its original position, and the L-shaped inverted buckle 6 and the slot at the tibial support positioning slot have an interference fit to achieve the locking purpose. The L-shaped inverted buckle is connected to the adjusting rod 5, and the forward and backward movement of the inverted buckle 6 can be controlled by adjusting the position of the adjusting rod 5. The inverted buckle cooperates with the slot of the tibial support, and the tension applied by the spring 4 and the interference fit with the tibial support achieve the purpose of interlocking.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tibial tray inserter and extractor capable of adjusting the front and rear positions, comprising a base (1), characterized in that: The base (1) includes a base body (11), a positioning groove (13) is provided at the bottom of the base body (11), a mounting hole (15) is provided at the top of the base body (11), a quick-connect joint (2) is installed at the mounting hole (15) of the base body (11), a guide groove (12) extending from top to bottom is provided at the base body (11), an undercut (6) is installed at the guide groove (12) of the base body (11), an adjusting rod (5) connected to the undercut (6) is installed at the base body (11), and a spring (4) is sleeved on the adjusting rod (5).

2. The tibial tray inserter and extractor capable of adjusting the front and rear ends of the tibial tray according to claim 1, characterized in that: The base body (11) and the quick-connect connector (2) are connected via a positioning pin (3), and the base body (11) is provided with a positioning hole (14) for installing the positioning pin (3).

3. The tibial tray inserter and extractor capable of being adjusted forward and backward according to claim 1, characterized in that: The regulating rod (5) is composed of a first rod body and a second rod body, the first rod body and the second rod body are an integrated structure, the diameter of the first rod body is smaller than the diameter of the second rod body, and the spring (4) is sleeved on the first rod body.

4. The tibial tray inserter and extractor capable of being adjusted forward and backward according to claim 2, characterized in that: The first rod body of the adjusting rod (5) extends to the guide groove (12) of the base (1), and the first rod body is connected to the undercut (6) via a threaded connection.

5. The tibial tray inserter and extractor capable of being adjusted forward and backward according to claim 1, characterized in that: The undercut (6) is an L-shaped undercut (6), and the undercut (6) is interference-fitted with the slot of the tibial tray.

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