CN111281476A

CN111281476A - Medullary cavity filing handle

Info

Publication number: CN111281476A
Application number: CN202010163407.1A
Authority: CN
Inventors: 史春宝; 许奎雪; 刘钊; 张朝锋; 王振国
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-06-16
Anticipated expiration: 2040-03-10
Also published as: CN111281476B

Abstract

The invention relates to the technical field of medical instruments, and provides a medullary cavity filing handle. The method comprises the following steps: the upper end of the filing head is provided with a connecting seat, and the lower end of the handle middle shaft is provided with a sleeve seat; the handle is characterized in that a sliding sleeve is arranged outside the middle shaft of the handle, a blind hole is formed in the center of the lower end of the middle shaft of the handle, a spring and a positioning pin are sequentially installed in the blind hole from top to bottom, the sliding sleeve is detachably connected with the positioning pin, the sliding sleeve drives the positioning pin to vertically slide in the blind hole to complete the detachable connection of the connecting seat and the sleeve seat, an outer convex groove is formed in the connecting seat, and an inner guide groove matched with the outer convex groove is formed in the sleeve seat. The invention has the beneficial effects that: the sliding of the shank medullary cavity handle in the horizontal direction is prevented by matching the inner surface of the inner guide groove at the bottom end of the middle shaft of the handle with the outer surface of the outer convex groove at the top end of the file head and the positioning pin, and the device is prevented from rotating and deflecting.

Description

Medullary cavity filing handle

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medullary cavity filing handle.

Background

The doctor needs to make up shin bone pulp cavity handle and file head together through threaded connection in doing the operation, when using file head file pulp cavity, the flank on the file head can be carved out on cancellous bone to carve out the recess of file head flank on the cancellous bone, also have the flank of recess matched with it on the tibial plateau holds in the palm, thereby reaches the tibial plateau and holds in the palm and cooperate with shin bone pulp cavity.

As is well known, a medullary cavity filing handle is an extension device which is connected with a filing head and is convenient for an operator to operate, the tibial medullary cavity handle and the filing head are mostly in threaded connection in the market in the connection mode, however, threads may slightly loosen or deflect at an angle under the condition of threaded connection, human eyes cannot perceive or are inconvenient to detect under the condition of little loosening of the threads, the threads cannot be found in time, the position of a machined groove can easily deviate, and therefore the position of a mounted tibial platform support is in and out of an expected position, and the expected operation effect cannot be achieved.

Disclosure of Invention

The invention aims to provide a medullary cavity filing handle to solve the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a medullary cavity filing handle, comprising: the upper end of the filing head is provided with a connecting seat, and the lower end of the handle middle shaft is provided with a sleeve seat; the handle is characterized in that a sliding sleeve is arranged outside the middle shaft of the handle, a blind hole is formed in the center of the lower end of the middle shaft of the handle, a spring and a positioning pin are sequentially installed inside the blind hole from top to bottom, the sliding sleeve is detachably connected with the positioning pin, and the sliding sleeve drives the positioning pin to vertically slide in the blind hole to complete the detachable connection of the connecting seat and the sleeve seat.

In an optional embodiment, the handle middle shaft, the positioning pin and the sliding sleeve are connected through a second pin.

In an optional embodiment, two guide grooves for the second pin to slide up and down are formed in the blind hole of the middle shaft of the handle.

In an optional embodiment, two first insertion holes for inserting the second pins are symmetrically formed in the side wall of the sliding sleeve.

In an optional embodiment, the positioning pin is provided with a second insertion hole for inserting the second pin.

In an optional embodiment, an outer convex groove is formed in the connecting seat, an inner guide groove matched with the outer convex groove is formed in the sleeve seat, the inner guide groove and the outer convex groove are inclined grooves matched with each other, and the outer convex groove can only slide into the inner guide groove from one direction.

In an optional embodiment, the connecting seat is further provided with a positioning blind hole for the positioning pin to be inserted into.

In an optional embodiment, the outer surface of the upper part of the handle middle shaft is further sleeved with a wavy handle sleeve, and the handle sleeve and the handle middle shaft are detachably connected through a first pin.

In an optional embodiment, the upper end of the middle shaft of the handle is in threaded connection with the end of the handle of the tibial medullary cavity, the whole end of the handle of the tibial medullary cavity is in a tongue shape, and the top end of the handle of the tibial medullary cavity is in a disc shape.

The invention has the beneficial effects that:

(1) the intramedullary canal filing handle prevents the sliding of the tibial intramedullary canal handle in the horizontal direction through the matching of the inner surface of the inner guide groove at the bottom end of the middle shaft of the handle and the outer surface of the outer convex groove at the top end of the filing head and the positioning pin, and jointly ensures that the instrument does not rotate and does not deflect.

(2) The handle middle shaft, the positioning pin and the sliding sleeve in the medullary cavity handle are detachably connected through the pin, the handle middle shaft, the positioning pin and the sliding sleeve are simple and practical, the sliding sleeve can drive the positioning pin to slide up and down, the positioning pin is matched with the positioning blind hole after installation is completed, and disassembly is rapid.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a medullary cavity filing handle according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a medullary cavity filing handle according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating an initial state of the connection between the central shaft of the handle and the rasp head according to an embodiment of the present invention.

Fig. 4 is a schematic view illustrating the sliding sleeve pulled upwards by the connection between the central shaft of the handle and the rasp head according to an embodiment of the invention.

Fig. 5 is a schematic view illustrating a state in which the axial center of the handle is completely connected with the rasp head according to an embodiment of the present invention.

Wherein, the reference numbers in the figures are: 1. the novel tibia marrow cavity handle comprises a file head, 2, a handle middle shaft, 3, a sliding sleeve, 4, a pin II, 5, a spring, 6, a tibia marrow cavity handle end portion, 7, a positioning pin, 8, a pin I, 9, a handle sleeve, 10, a jack I, 11, a connecting seat, 12, a sleeve seat, 13, a guide groove, 14, an inner guide groove, 15 and an outer convex groove.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

Referring to fig. 1-2, the present embodiment provides a handle for medullary cavity filing, comprising: the head 1 and the handle middle shaft 2, the top end of the handle middle shaft 2 is connected with the handle end part 6 of the tibia medullary cavity in a threaded way.

Wherein, for the convenience of doctor's use in order to beat the recess fast, optional embodiment, the top of shin bone pulp chamber handle tip 6 designs for the disc shape, and further, for the convenience of doctor takes out the apparatus, the whole design of shin bone pulp chamber handle tip 6 is the tongue shape, and the doctor can be through upwards beating shin bone pulp chamber handle tip 6 and take out the apparatus fast.

Furthermore, in order to increase friction force and improve the reliability of holding the handle by a doctor, the outer surface of the upper part of the handle middle shaft 2 is further sleeved with a wave-shaped handle sleeve 9, the handle sleeve 9 is detachably connected with the handle middle shaft 2 through a pin I8, and the handle sleeve 9 and the handle middle shaft 2 are correspondingly provided with a second insertion hole through which the pin I8 penetrates.

Further, the upper end of the file head 1 is provided with a connecting seat 11, the lower end of the handle middle shaft 2 is provided with a sleeve seat 12, in an optional embodiment, the connecting seat 11 is provided with an outer convex groove 15, the sleeve seat 12 is provided with an inner guide groove 14 matched with the outer convex groove 15, it should be noted that the inner surface of the inner guide groove 14 is matched with the outer surface of the outer convex groove 15, as shown in fig. 4, the inner guide groove 14 and the outer convex groove 15 are inclined grooves matched with each other, preferably conical grooves, the outer convex groove 15 can only slide into the inner guide groove 14 from one direction, the connecting mode is stable, the handle is not prone to swing, and the sliding of the handle in the tibia medullary cavity in the horizontal direction is prevented.

Furthermore, the sliding sleeve 3 is arranged outside the handle middle shaft 2, the blind hole is formed in the center of the lower end of the handle middle shaft 2, the spring 5 and the positioning pin 7 are sequentially installed inside the blind hole from top to bottom, the sliding sleeve 3 is detachably connected with the positioning pin 7, and the sliding sleeve 3 drives the positioning pin 7 to slide up and down in the blind hole to complete the detachable connection of the file head 1 and the handle middle shaft 2.

In order to further prevent the slippage of the handle of the tibia medullary cavity in the horizontal direction and conveniently and rapidly assemble and disassemble the file head 1, the handle middle shaft 2, the positioning pin 7 and the sliding sleeve 3 are connected through a pin II 4; two guide grooves 13 for the second pin 4 to slide up and down are formed in the blind hole of the middle shaft 2 of the handle; two insertion holes I10 for inserting the pin II 4 are symmetrically formed in the side wall of the sliding sleeve 3; the positioning pin 7 is provided with a second inserting hole for inserting the second pin 4. It is worth mentioning that the connecting seat 11 is further provided with a blind hole for inserting the positioning pin 7 into.

Figures 3-5 further illustrate the assembling and disassembling process of the handle central shaft 2 and the rasp head 1 in the embodiment of the invention. Firstly, the pin II 4 is inserted into the sliding sleeve 3 and the positioning pin 7, the sliding sleeve 3 is pulled upwards, the positioning pin 7 moves upwards in the guide groove 13 to compress the spring 5, then the connecting seat 11 slides into the sleeve seat 12, the inner surface of the inner guide groove 14 of the sleeve seat 11 is matched with the outer surface of the outer convex groove 15 of the connecting seat 11, finally the sliding sleeve 3 is released, the sliding sleeve 3 moves downwards under the action of the spring 5, and the positioning pin 7 is inserted into the positioning blind hole to complete the connection of the handle center shaft 2 and the file head 1.

In the process of disassembly, the sliding sleeve 3 is pulled upwards to compress the spring 5, the positioning pin 7 moves upwards in the guide groove 13, the positioning pin 7 leaves the positioning blind hole, then the connecting seat 11 is separated from the sleeve seat 12, and the disassembly of the handle middle shaft 2 and the file head 1 is completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A medullary cavity filing handle, comprising: the upper end of the filing head is provided with a connecting seat, and the lower end of the handle middle shaft is provided with a sleeve seat;

the method is characterized in that: the handle is characterized in that a sliding sleeve is arranged outside the middle shaft of the handle, a blind hole is formed in the center of the lower end of the middle shaft of the handle, a spring and a positioning pin are sequentially installed inside the blind hole from top to bottom, the sliding sleeve is detachably connected with the positioning pin, and the sliding sleeve drives the positioning pin to vertically slide in the blind hole to complete the detachable connection of the connecting seat and the sleeve seat.

2. The intramedullary canal contusion handle of claim 1 wherein the handle central shaft, the locating pin and the sliding sleeve are connected by a second pin.

3. The handle of claim 2, wherein two guide grooves are provided at the blind hole of the central shaft of the handle for the second pin to slide up and down.

4. The intramedullary canal filing handle of claim 3, wherein the side wall of the sliding sleeve is symmetrically provided with two first insertion holes for inserting the second pins.

5. A medullary cavity filing handle as claimed in claim 4, wherein the positioning pin is provided with a second insertion hole for inserting the second pin.

6. The handle of claim 1, wherein the connecting base has an outer groove, the sleeve base has an inner guide groove matching with the outer groove, the inner guide groove and the outer groove are inclined grooves matching with each other, and the outer groove can only slide into the inner guide groove from one direction.

7. The handle of claim 6, wherein the connecting base further comprises a blind hole for inserting the positioning pin into.

8. The intramedullary canal contusion handle of claim 1 wherein the outer surface of the upper portion of the handle central shaft is further sleeved with a wave-shaped handle sleeve, and the handle sleeve and the handle central shaft are detachably connected through a pin I.

9. The medullary cavity filing handle of claim 1, wherein the upper end of the central shaft of the handle is threadedly connected to the end of the tibial medullary cavity handle, the end of the tibial medullary cavity handle is tongue-shaped as a whole, and the top of the end of the tibial medullary cavity handle is disk-shaped.