Connecting structure of snake bone and head end

Abstract

The utility model relates to the technical field of medical instruments, in particular to a connecting structure of a snake bone and a head end, a cavity of the head end comprises an insertion cavity and an installation cavity which are axially through, the installation cavity is provided with an instrument hole and a lens hole in an isolated mode, the insertion cavity is used for the front end of the snake bone to be inserted, and the insertion cavity and the lens hole are matched in an insertion mode. A through hole penetrating in the radial direction is formed in the peripheral wall of the inserting section and used for being filled with solidifiable glue; the through hole and the blind groove are filled with the glue, the boss is formed in the blind groove after the glue is solidified, and the inverted buckling structure is formed in the through hole; therefore, when the bonding strength of the glue is reduced, the boss formed by the glue can clamp the snake bone and prevent the snake bone from rotating and misplacing with the head end, and the inverted buckling structure formed by the glue can clamp the snake bone and prevent the snake bone from being separated from the head end, so that the connecting strength of the snake bone and the head end is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a connection structure between a snake bone and a head end. Background Art

[0002] With the rapid development of science and medical technology, minimally invasive or non-invasive medical examination and treatment by endoscope has become widely popularized. In particular, medical soft endoscope can enter the body through the natural channels of the human body to explore or treat the diseased tissue during examination or treatment.

[0003] An endoscope usually includes a control handle and an end actuator. The control handle can control the rotation direction of the end actuator and can control the end actuator to take pictures or videos of the diseased part of the human body. The end actuator includes a snake bone and a head end. The control handle adjusts the direction of the snake bone to control the rotation direction of the end actuator. The head end is connected to the snake bone, and the signal transmission component and the working channel tube are both installed inside the snake bone and move with the movement or bending of the snake bone.

[0004] In the existing connection structure between the snake bone and the head end, after the snake bone is glued into the head end with glue, it can only ensure that there is no risk of loosening between the snake bone and the head end in a short period of time; however, if it is stored or used in a high temperature and high humidity environment for a long time, the bonding strength of the glue will decrease, causing the snake bone and the head end to be misaligned or directly separated. Summary of the invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the problem in the prior art that when the connection structure between the snake bone and the head end is stored or used in a high temperature and high humidity environment for a long time, the bonding strength of the glue decreases, causing misalignment or direct separation between the snake bone and the head end, the utility model provides a connection structure between the snake bone and the head end that can improve the connection strength.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a connection structure between a snake bone and a head end, the cavity of the head end includes an axially penetrating plug-in cavity and an installation cavity, the cross-sectional area of ​​the plug-in cavity is larger than the cross-sectional area of ​​the installation cavity, and a step surface is formed between the two; the installation cavity is separated and provided with an instrument hole and a lens hole, the plug-in cavity is used for inserting the front end of the snake bone, the two are plugged and matched, and the inserted part of the snake bone is a plug-in section, and after the snake bone is inserted, it abuts against the step surface, and a radially penetrating through hole is opened on the peripheral wall of the plug-in section, and the through hole is used to fill with solidifiable glue.

[0007] The lens hole and the instrument hole are blocked from the front end of the head end, a cavity that can receive liquid is formed in the head end, the cavity is filled with glue, and then the snake bone is inserted into the cavity of the head end. At this time, the glue in the cavity will fill the through hole, and finally the overflowed glue is wiped off. After the glue in the through hole solidifies, it forms an inverted structure to clamp the snake bone, so that the snake bone and the head end are reliably connected, and the glue will not fail due to changes in environmental parameters, causing the snake bone to slip out of the head end.

[0008] Furthermore, at least one blind groove is provided on the front end face of the plug-in section, and a plurality of blind grooves are spaced apart along the circumference of the snake bone. The blind groove is used to fill with solidifiable glue. The blind groove can increase the contact area between the glue and the snake bone to improve the bonding strength of the connection between the snake bone and the head end. After the glue fills the blind groove and solidifies, a boss will be formed in the blind groove, which will clamp the snake bone to prevent it from rotationally dislocating from the head end.

[0009] Furthermore, the insertion cavity is provided with a positioning hole, and the insertion section is axially extended with a positioning column that matches the positioning hole, and the positioning column is inserted into the positioning hole to achieve initial positioning of the snake bone and the head end.

[0010] Furthermore, there are two positioning holes and two positioning columns. The two positioning columns are symmetrically arranged at the center of the snake bone. The two positioning holes correspond to the two positioning columns one by one and each positioning column is inserted into the corresponding positioning hole.

[0011] Furthermore, there are two through holes, which are symmetrically arranged at the center of the snake bone. After the two symmetrical through holes are injected with glue, two symmetrical inverted structures will be formed, thereby improving the connection strength between the snake bone and the head end.

[0012] Furthermore, the positioning posts correspond to the through holes one by one, and each positioning post is located at the front end of the through hole corresponding to it. The two are located on the same straight line and are arranged adjacent to each other. The through holes realize the axial fixation of the head end and the snake bone, and the cooperation between the positioning posts and the positioning holes realizes the circumferential fixation of the head end and the snake bone. The fixed positions in the two directions are arranged adjacent to each other, which increases the reliability of the connection between the head end and the snake bone.

[0013] Furthermore, the cross-sectional area of ​​the positioning hole is larger than the cross-sectional area of ​​the positioning column, that is, the extension length of the positioning hole along its circumference is larger than the extension length of the positioning column along its circumference, and the extension length of the positioning hole along its radial direction is larger than the extension length of the positioning column along its radial direction. The glue is filled between the positioning hole and the positioning column, which can provide sufficient space for the glue, increase the glue filling amount between the positioning hole and the positioning column, and improve the bonding strength between the two.

[0014] The beneficial effect of the utility model is as follows: the utility model uses glue to fill the through hole and the blind groove, and after the glue solidifies, a boss is formed in the blind groove, and an undercut structure is formed in the through hole; in this way, when the bonding strength of the glue decreases, the boss formed by the glue will clamp the snake bone to prevent it from rotating and dislocating with the head end, and the undercut structure formed by the glue will clamp the snake bone to prevent it from separating from the head end, thereby improving the connection strength between the snake bone and the head end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a left-side structural schematic diagram of the utility model;

[0019] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0020] Figure 5 yes Figure 3 Cross-sectional view in the BB direction;

[0021] In the figure: 1, head end; 101, plug-in cavity; 102, instrument hole; 103, lens hole; 104, step surface; 105, positioning hole; 2, snake bone; 201, through hole; 202, blind groove; 203, positioning column. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] like Figure 1 to Figure 5 The connection structure of the snake bone and the head end shown in the figure, the rear end surface of the head end 1 (that is, Figure 1 The left end face in the figure) is flat, and the front end face of the head end 1 (i.e. Figure 1 The lower half of the right end surface in the figure is in the shape of an inclined surface. The cavity of the head end 1 includes an axially penetrating plug-in cavity 101 and an installation cavity. The cross-sectional area of ​​the plug-in cavity 101 is larger than the cross-sectional area of ​​the installation cavity, and a stepped surface 104 is formed between the two.

[0024] The installation cavity is separated and provided with an instrument hole 102 and a lens hole 103, wherein the lens hole 103 is located in the upper half of the installation cavity, and the instrument hole 102 is located in the lower half of the installation cavity. The lens hole 103 is used to install the lens necessary for the endoscope, so as to observe the location of the human body lesions and give the operator a clear view in the human body cavity, while the instrument hole 102 is used to insert the instruments of minimally invasive surgery, such as soft tissue hemostatic clips, stone removal baskets, guide wires, etc.

[0025] The insertion cavity 101 is used for inserting the front end of the snake bone 2, the two are plugged together and the inserted part of the snake bone 2 is the insertion section, and the inserted snake bone 2 abuts against the stepped surface 104; the insertion cavity 101 is provided with a positioning hole 105, and the insertion section axially extends with a positioning column 203 that cooperates with the positioning hole 105. The number of positioning holes 105 and positioning columns 203 can be two, three or four, etc. In this embodiment, there are two positioning holes 105 and two positioning columns 203. The two positioning columns 203 are symmetrically arranged in the center of the snake bone 2. The two positioning holes 105 correspond one-to-one to the two positioning columns 203, and each positioning column 203 is inserted into its corresponding positioning hole 105 to achieve the initial positioning of the snake bone 2 and the head end 1. The cross-sectional area of ​​the positioning hole 105 is larger than the cross-sectional area of ​​the positioning column 203, that is, the extension length of the positioning hole 105 along its circumference is larger than the extension length of the positioning column 203 along its circumference, and the extension length of the positioning hole 105 along its radial direction is larger than the extension length of the positioning column 203 along its radial direction. The glue is filled between the positioning hole 105 and the positioning column 203, which can provide sufficient space for the glue, increase the glue filling amount between the positioning hole 105 and the positioning column 203, and improve the bonding strength between the two.

[0026] A radial through hole 201 is provided on the peripheral wall of the plug-in section, and the number of the through hole 201 is at least one. The through hole 201 is used to fill with solidifiable glue. After the glue inside solidifies, an inverted structure will be formed to clamp the snake bone 2. In the present embodiment, there are two through holes 201, and the two through holes 201 are symmetrically arranged at the center of the snake bone 2. After the two symmetrical through holes 201 are injected with glue, two symmetrical inverted structures will be formed, thereby improving the connection strength between the snake bone 2 and the head end 1; the positioning columns 203 correspond to the through holes 201 one by one, and each positioning column 203 is located at the front end of the through hole 201 corresponding to it, and the two are located in the same straight line and are arranged adjacent to each other. The through hole 201 realizes the axial fixation of the head end 1 and the snake bone 2, and the cooperation of the positioning column 203 and the positioning hole 105 realizes the circumferential fixation of the head end 1 and the snake bone 2. The fixed positions in the two directions are arranged adjacent to each other, thereby increasing the reliability of the connection between the head end 1 and the snake bone 2.

[0027] Working principle:

[0028] The lens hole 103 and the instrument hole 102 are blocked from the front end face of the head end 1 to form a cavity that can hold liquid inside the head end 1, which is filled with glue. The snake bone 2 is then inserted into the cavity of the head end 1, and the snake bone 2 is connected to the head end 1 through the positioning column 203 and the positioning hole 105. At this time, the glue in the cavity will fill the through hole 201 and the blind groove 202, and finally the overflowed glue is wiped off.

[0029] When the glue is in liquid form, it will fill the through hole 201 and the blind groove 202. After the glue solidifies, a new structural part will be formed. The structural part will form a boss in the blind groove 202 and an undercut structure in the through hole 201. In this way, when the adhesive strength of the glue decreases, the boss formed by the glue will clamp the snake bone 2 to prevent it from rotating and misaligning with the head end 1; when the adhesive strength of the glue decreases, the undercut structure formed by the glue will clamp the snake bone 2, so that the snake bone 2 and the head end 1 are reliably connected, and the glue will not fail due to changes in environmental parameters, causing the snake bone 2 to slip out of the head end 1.

[0030] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A connection structure between a snake bone and a head end, characterized in that: The cavity of the head end (1) comprises an inserting cavity (101) and an installation cavity which are interconnected, the installation cavity being provided with an instrument hole (102) and a lens hole (103) in isolation, the inserting cavity (101) being used for inserting the front end of the snake bone (2), the two being plugged together and the insertion part of the snake bone (2) being an inserting section, the peripheral wall of the inserting section being provided with a radially penetrating through hole (201), the through hole (201) being used for filling with curable glue.

2. The connection structure between the snake bone and the head end according to claim 1, characterized in that: At least one blind groove (202) is provided on the front end surface of the plug-in section, and a plurality of blind grooves (202) are distributed at intervals along the circumference of the snake bone (2), and the blind grooves (202) are used to be filled with curable glue.

3. The connection structure between the snake bone and the head end according to claim 1, characterized in that: The inserting cavity (101) is provided with a positioning hole (105), and the inserting section is axially extended with a positioning column (203) that cooperates with the positioning hole (105), and the positioning column (203) is inserted into the positioning hole (105).

4. The connection structure between the snake bone and the head end according to claim 3, characterized in that: There are two positioning holes (105) and two positioning posts (203). The two positioning posts (203) are symmetrically arranged at the center of the snake bone (2). The two positioning holes (105) correspond to the two positioning posts (203) one by one.

5. The connection structure between the snake bone and the head end according to claim 4, characterized in that: There are two through holes (201), and the two through holes (201) are symmetrically arranged at the center of the snake bone (2).

6. The connection structure of the snake bone and the head end according to claim 5, characterized in that: The positioning posts (203) correspond to the through holes (201) one by one, and each positioning post (203) is located at the front end of the through hole (201) to which it corresponds.

7. The connection structure between the snake bone and the head end as claimed in claim 3, characterized in that: The cross-sectional area of ​​the positioning hole (105) is greater than the cross-sectional area of ​​the positioning column (203).

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