CN108451674B

CN108451674B - Tibia support driving-in and taking-out device

Info

Publication number: CN108451674B
Application number: CN201810223668.0A
Authority: CN
Inventors: 周嘉宏; 邓向军
Original assignee: Trauson Medical Instrument China Co Ltd
Current assignee: Trauson Medical Instrument China Co Ltd
Priority date: 2018-03-19
Filing date: 2018-03-19
Publication date: 2024-01-09
Anticipated expiration: 2038-03-19
Also published as: CN108451674A

Abstract

The invention provides a tibia support driving extractor which comprises a base, an elastic element, a cam, a handle and a locking block, wherein the base is of a cylindrical structure with a cavity inside, the elastic element, the cam and the locking block are sequentially connected and arranged in the cavity from top to bottom, a fixing groove matched with the outer dimension of a prosthesis is formed in the side wall of the bottom of the cavity, a guide groove is formed in the side wall of the base, one end of the handle penetrates through the guide groove to be fixedly connected with the cam, and the handle is toggled back and forth along the guide groove, so that the handle drives the cam to rotate, and the locking block is pushed out or retracted into the fixing groove along the radial direction of the base. The locking block is pushed out or retracted by adopting the cam structure to realize the locking fixation of the prosthesis, the structure is simple, when the prosthesis is locked, only the handle is required to be stirred, the operation is simple, and the locking is firmer and the positioning precision is higher by adopting the fixing groove matched with the outer dimension of the prosthesis.

Description

Tibia support driving-in and taking-out device

Technical Field

The invention relates to the technical field of medical appliances, in particular to a tibia support driving-in and taking-out device.

Background

Knee joints are the largest and most complex joints in the human body. Knee replacement is one of the effective ways to treat knee joint diseases such as degenerative arthritis, rheumatoid arthritis, post-traumatic arthritis, and buckling deformity, and related studies are also being increasingly emphasized.

After the tibia completes the osteotomy, the tibial plateau prosthesis needs to be installed and fixed. The position of the prosthesis needs to be positioned before fixing, the existing locking mechanism mostly adopts a claw with an openable head to position, the head of the claw is inserted into a positioning hole of the prosthesis, and then the claw is outwards opened, so that the prosthesis is locked, the locking mode has a complex structure, the requirements on processing and assembling parts and components are high, and the cost is high; in the operation process, the operator easily neglects the locking function or the locking is not firm, and a great risk exists.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the invention provides a tibia support driving extractor which aims at overcoming the defects of complex structure, high processing cost, unreliable locking and the like in the prior art.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a ware is driven into to shin bone holds in palm, includes base, elastic element, cam, handle and latch segment, the base is the cylindricality structure that inside was equipped with the cavity, elastic element, cam and latch segment from the top down connect gradually and arrange in the cavity, be equipped with on the lateral wall of cavity bottom with the fixed slot of false body external dimension matching, be equipped with the guide way on the lateral wall of base, handle one end passes the guide way with cam fixed connection, follow the guide way is reciprocal to stir the handle, makes the handle drives the cam rotates, thereby realizes the latch segment follows the radial release of base or withdrawal the fixed slot.

The elastic element adopts a spring, the spring is always in a compressed state, and the force is applied to the locking block through the cam mechanism, so that the locking block and the cam are prevented from loosening. The guide groove is used for guiding and limiting when the handle is poked; the fixing groove is used for covering the prosthesis, so that the position of the prosthesis is fixed, and the locking is convenient; the locking block is pushed out or retracted by adopting a cam structure to realize the locking and fixing of the prosthesis.

Specifically, the base includes connector, body and the base that from the top down connects gradually, the connector with body upper end block is connected, the body is the cylinder, the base profile is U-shaped structure, just the cavity follows the body top runs through to the bottom of base, just the cavity is located the part in the body is cylindrical, the cavity is located the part in the base is the U-shaped, the latch segment is located in the U-shaped portion of cavity, the fixed slot sets up the opening part of cavity U-shaped portion. The connector is fixedly connected with the body in a clamping way and is used for being connected and matched with other instruments,

further, in order to realize the assembly and fixation of the cam, a locking groove is formed in the locking block, and the lower end of the cam is inserted into the locking groove.

Further, a first hole penetrating through the connector in the axial direction is formed in the connector, and the bottom of the first hole is communicated with the cavity. The first axial hole in the connector is used for cleaning the instrument, so that the cavity is conveniently cleaned, and meanwhile, the weight of the instrument can be reduced.

Further, four through holes are uniformly distributed on the side wall of the body, and the through holes are positioned on the upper part of the handle. The four through holes in the side wall of the body have substantially the same function as the first holes, on the one hand for cleaning and on the other hand for weight reduction.

Further, a second hole is formed in the base at a position opposite to the fixing groove. The second hole is used for providing a stroke for the locking block, so that the locking block is ensured to have enough stroke.

Preferably, the elastic element is a spring.

The beneficial effects of the invention are as follows: the tibia support driving-in extractor provided by the invention has the advantages that the locking block is pushed out or retracted by adopting the cam structure to realize the locking fixation of the prosthesis, the structure is simple, the handle is only required to be stirred during locking, the operation is simple, and the locking is firmer and the positioning precision is higher by adopting the fixing groove matched with the external dimension of the prosthesis.

Drawings

The invention is further described below with reference to the drawings and examples.

FIG. 1 is a schematic perspective view of a preferred embodiment of the present invention;

FIG. 2 is a schematic side elevational view of a preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the structure G-G of FIG. 2;

FIG. 4 is a schematic cross-sectional view of H-H of FIG. 2;

FIG. 5 is a schematic cross-sectional view of E-E of FIG. 2;

FIG. 6 is a schematic cross-sectional view of A-A of FIG. 5;

FIG. 7 is a schematic cross-sectional view of F-F in FIG. 5;

fig. 8 is a schematic view of the use state of the preferred embodiment of the present invention.

In the figure: 200. the tibia support, 201, tibia support bulge, 400 and tibia support driving extractor, 1, locking block, 11, locking groove, 2, cam, 3, spring, 4, base, 41, connector, 42, body, 43, base, 44, hole one, 45, through hole, 46, hole two, 5, handle, 6, cavity, 7, fixed slot, 8 and guiding slot.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the invention only by way of illustration, and therefore it shows only the constitution related to the invention.

As shown in fig. 1 to 7, a tibial tray driving-in extractor of the present invention comprises a base 4, an elastic member, preferably a spring 3, a cam 2, a handle 5 and a locking block 1. The base 4 is a cylindrical structure with a cavity 6 inside, the spring 3, the cam 2 and the locking block 1 are sequentially connected from top to bottom and placed in the cavity 6, a fixed groove 7 matched with the external dimension of the prosthesis 300 is formed in the side wall of the bottom of the cavity 6, a guide groove 8 is formed in the side wall of the base 4, one end of the handle 5 penetrates through the guide groove 8 and is fixedly connected with the cam 2 through laser welding, the handle 5 is reciprocated along the guide groove 8, the handle 5 drives the cam 2 to rotate, and accordingly the locking block 1 is pushed out or retracted from the base 4 radially to the fixed groove 7, the fixed groove 7 is of a V-shaped structure and can be suitable for clamping of the external dimension of any size.

The base 4 includes connector 41, body 42 and base 43 that from the top down connects gradually, connector 41 with body 42 upper end block and fixed connection, body 42 is the cylinder, base 43 profile is U-shaped structure, just cavity 6 follows body 42 top runs through to base 43's bottom, just cavity 6 is located the part in the body 42 is cylindrical, cavity 6 is located the part in the base 43 is the U-shaped, retaining block 1 is located in the U-shaped portion of cavity 6, fixed slot 7 sets up the opening part of cavity 6U-shaped portion.

The locking block 1 is provided with a locking groove 11, and the lower end of the cam 2 is inserted into the locking groove 11.

The inside of the connector 41 is provided with a first hole 44 penetrating through the connector 41 along the axial direction, and the bottom of the first hole 44 is communicated with the cavity 6. Four through holes 45 are uniformly distributed on the side wall of the body 42, and the through holes 45 are positioned on the upper part of the handle 5. The first hole 44 and the four through holes 45 are used for cleaning and weight reduction.

And a second hole 46 is arranged on the base 43 at a position opposite to the fixed groove 7. The second hole 46 is used to provide a sufficient effective travel for the lock block 1.

The using method comprises the following steps:

as shown in fig. 8, the prosthesis in this embodiment refers to a tibial tray 200, and a tibial tray protrusion 201 is provided on the tibial tray 200, and the specific operation steps are as follows:

a) Connecting the tibial tray driving extractor 400 of the present invention with the striking handle to form an assembly and pulling the handle 5 to the unlocked position;

b) Placing the assembly on the tibial tray 200, covering the fixing groove 7 on the tibial tray bulge 201 of the tibial tray 200, poking the handle 5 to a locking state, and pushing the locking block 1 out by the cam 2 to press on the tibial tray bulge 202 of the tibial tray 200 so as to lock the tibial tray 200;

c) And d, placing the locked tibia support 200 at a proper position of tibia, knocking a knocking handle for installation, and taking out the assembly in the step a after the installation is completed.

It should be noted that when the handle 5 is turned, the lock block 1 is free to move in the base 4; the connection of the handle 5 to the cam 2 is laser welded only on both sides of the handle 5.

While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a take-out ware is beaten into to shin bone support for hold in the palm the locking fixedly to the shin bone, be equipped with the shin bone on the shin bone and hold in the palm protruding, its characterized in that: the novel tibia support is characterized by comprising a base (4), an elastic element, a cam (2), a handle (5) and a locking block (1), wherein the base (4) is of a cylindrical structure with a cavity (6) inside, the elastic element, the cam (2) and the locking block (1) are sequentially connected from top to bottom and placed in the cavity (6), a fixing groove (7) matched with the outline dimension of a tibia support is formed in the side wall of the bottom of the cavity (6), a guide groove (8) arranged along the circumferential direction is formed in the side wall of the base (4), one end of the handle (5) penetrates through the guide groove (8) and is fixedly connected with the cam (2), and the handle (5) is toggled along the guide groove (8) to enable the handle (5) to drive the cam (2) to rotate, so that the locking block (1) is pushed out or retracted into the fixing groove (7) along the radial direction of the base (4).

When the locking is fastened, the fixing groove (7) covers the tibial tray bulge of the tibial tray, and the handle (5) drives the cam (2) to push out the locking block (1) to press the tibial tray bulge of the tibial tray so as to lock the tibial tray;

the locking block (1) is provided with a locking groove (11), and the lower end of the cam (2) is inserted into the locking groove (11).

2. The tibial tray driving remover of claim 1 wherein: the base (4) comprises a connector (41), a body (42) and a base (43) which are sequentially connected from top to bottom, the connector (41) is connected with the upper end of the body (42) in a clamping mode, the body (42) is a cylinder, the outline of the base (43) is of a U-shaped structure, the cavity (6) penetrates through the top of the body (42) to the bottom of the base (43), the part of the cavity (6) located in the body (42) is cylindrical, the part of the cavity (6) located in the base (43) is of a U-shaped, the locking block (1) is located in the U-shaped part of the cavity (6), and the fixing groove (7) is formed in the opening of the U-shaped part of the cavity (6).

3. The tibial tray driving remover of claim 2 wherein: the inside of connector (41) is equipped with along the axial run through hole one (44) of connector (41), the bottom of hole one (44) with cavity (6) intercommunication.

4. The tibial tray driving remover of claim 2 wherein: four through holes (45) are uniformly distributed on the side wall of the body (42), and the through holes (45) are positioned on the upper part of the handle (5).

5. The tibial tray driving remover of claim 2 wherein: and a second hole (46) is arranged on the base (43) at a position opposite to the fixed groove (7).

6. The tibial tray driving remover of claim 1 wherein: the elastic element adopts a spring (3).