Snake bone and insertion tube connecting structure and endoscope

Abstract

The utility model discloses a snake bone and insertion tube connecting structure which comprises a snake bone and an insertion tube, the tail end joint of the snake bone is in a stepped circle shape and can be clamped into the insertion tube, so that the snake bone is fixedly connected with the insertion tube; and the tail end joint is in a stepped circle shape, namely the diameter of the tail end joint at the overlapped part after the tail end joint is clamped with the insertion tube is smaller than that of the tail end joint at the non-overlapped part. The utility model further relates to an endoscope comprising the snake bone and insertion tube connecting structure. A rear connecting ring is not needed any more, so that the internal space of the joint of the snake bone and the insertion tube is enlarged, a clamp channel tube, an optical fiber bundle and a cable can smoothly pass through, possible pressure damage is avoided, and the diagnosis and treatment experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly to a connecting structure between a snake bone and an insertion tube and an endoscope. Background Art

[0002] An electronic endoscope is a medical electronic optical instrument that can be inserted into the body cavity and internal organs of the human body for direct observation, diagnosis, and treatment. In existing electronic endoscopes, a rear connecting ring is generally connected between the snake bone and the insertion tube, that is, one end of the rear connecting ring is connected to the snake bone, and the other end is connected to the insertion tube. For example, the Chinese invention patent document (application number: 202210938373.8) discloses a disposable medical endoscope with a reasonable internal layout, including a handle. One end of the handle is connected to an insertion tube, one end of the insertion tube is connected to a snake bone, one end of the snake bone is connected to the insertion tube through a rear connecting ring. A clamping groove is formed on the rear connecting ring, and a spring protection sleeve is arranged at a position corresponding to the clamping groove inside the rear connecting ring. Part of the spring protection sleeve is embedded in the clamping groove, and the clamping groove and the spring protection sleeve are fixed by laser welding. Welding points are arranged between the clamping groove and the spring protection sleeve. A traction wire, a forceps catheter, and a signal wire are connected to the handle. The traction wire passes through the spring protection sleeve. The other end of the snake bone is connected to a front end head through a front connecting ring. The clamping groove can provide an installation space for the spring protection sleeve, does not affect the layout of the forceps catheter, and can clearly observe the position of the spring protection sleeve, which is beneficial to the installation of the traction wire; the rear connecting ring and the spring protection sleeve are fixed by laser welding.

[0003] It is found in work that after the rear connecting ring connects the snake bone and the insertion tube, its inner diameter will be further limited. The forceps channel tube, the optical fiber bundle, and the cable are arranged in the inner cavity formed by the snake bone tube, the rear connecting ring, and the insertion tube, which becomes more crowded and is prone to interference with each other. In addition, as a connecting component, the cost of the rear connecting ring is relatively high during the early proofing of the product, and the connecting process is relatively complicated. Summary of the Utility Model

[0004] 1. Technical Problems to be Solved by the Utility Model

[0005] The purpose of the utility model is to provide a connecting structure between a snake bone and an insertion tube and an endoscope, which increases the internal space at the connection between the snake bone and the insertion tube, facilitates the smooth passage of the forceps channel tube, the optical fiber bundle, and the cable, and also avoids possible damage due to pressure, thus improving the diagnosis and treatment experience.

[0006] 2. Technical Solutions

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A connecting structure between a snake bone and an insertion tube of the utility model includes a snake bone and an insertion tube. The tail end joint of the snake bone is in a stepped circular shape and can be clamped into the insertion tube, so that the snake bone and the insertion tube are fixedly connected;

[0009] The tail joint is in a stepped circular shape, which means that the diameter of the tail joint of the part that coincides with the insertion tube after the tail joint is engaged with the insertion tube is smaller than the diameter of the tail joint of the part that does not coincide.

[0010] Furthermore, the length of the part of the tail joint that coincides with the insertion tube in the axial direction is 3 mm to 5 mm.

[0011] Furthermore, the outer diameter of the tail joint of the part that coincides with the insertion tube is equal to the inner diameter of the insertion tube.

[0012] Furthermore, the outer diameter of the tail joint that does not coincide with the insertion tube is equal to the outer diameter of the tinned part of the insertion tube.

[0013] Furthermore, the connection structure further includes a capillary tube. The tail joint is provided with a connection groove, and the capillary tube is fixedly connected to the tail joint at the connection groove.

[0014] Furthermore, the connection groove is a through groove.

[0015] Furthermore, the capillary tube is fixedly connected to the tail joint by welding.

[0016] Furthermore, the tail joint is fixedly connected to the insertion tube by welding or gluing.

[0017] Another aspect of the present utility model also relates to an endoscope, which includes the above-mentioned connection structure between the snake bone and the insertion tube.

[0018] 3. Beneficial effects

[0019] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0020] A connection structure between a snake bone and an insertion tube of the present utility model includes a snake bone and an insertion tube. The tail joint of the snake bone is in a stepped circular shape and can be inserted into the insertion tube, so that the snake bone and the insertion tube are fixedly connected. Since there is no need for a rear connection ring, the internal space at the connection between the snake bone and the insertion tube is increased, which is beneficial for the forceps channel tube, fiber optic bundle, and cable to pass through smoothly, and also avoids possible damage due to pressure, improving the diagnosis and treatment experience; at the same time, it can also save economic costs. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of the connection between the snake bone and the insertion tube in the prior art through a rear connection ring;

[0022] Figure 2 is a schematic structural diagram of the connection between the snake bone and the insertion tube of the present utility model;

[0023] Figure 3 isFigure 2 Enlarged view of part A

[0024] Figure 4 It is a schematic diagram of the snake bone tube structure with a tail end joint of the present utility model.

[0025] Explanation of reference numerals in the schematic diagram: 1. Snake bone, 11. Tail end joint, 12. Connecting groove, 2. Rear connecting ring, 3. Insertion tube, 4. Capillary tube. Specific implementation mode

[0026] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments.

[0027] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "inside", "outside", "front", "rear", "head", "tail", etc. cited in this specification are only for the convenience of clear narration, and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.

[0028] Combined with Figures 1 to 4 As shown, a connection structure between a snake bone and an insertion tube of the present utility model includes a snake bone 1 and an insertion tube 3. The tail end joint 11 of the snake bone is in the shape of a stepped circle and can be inserted into the insertion tube 3, so that the snake bone 1 and the insertion tube 3 are fixedly connected. Preferably, the tail end joint 11 and the insertion tube 3 are fixedly connected by welding or gluing.

[0029] The fact that the tail end joint 11 is in the shape of a stepped circle means that the diameter of the tail end joint 11 of the part that coincides after the tail end joint 11 is engaged with the insertion tube 3 is smaller than the diameter of the tail end joint 11 of the part that does not coincide.

[0030] Of course, it can also be that the tail end joint 11 itself is in the shape of a stepped circle relative to other snake bone joints adjacent to the tail end joint, that is, the diameter of the tail end joint 11 is smaller than the diameter of other snake bone joints adjacent to the tail end joint. After installation, the entire tail end joint 11 coincides with the insertion tube 3.

[0031] In addition, the insertion tube 3 can also be in a stepped circular shape, that is, the diameter of the part of the insertion tube 3 that coincides with the tail end joint 11 is greater than the diameter of the other parts of the insertion tube 3. This stepped circular shape of the insertion tube 3 just corresponds to the stepped circular shape of the tail end joint 11. After the two are engaged, ideally, the inner and outer diameters of the tail end joint 11 are equal to the inner and outer diameters of the insertion tube 3.

[0032] The length of the part of the tail end joint 11 that coincides with the insertion tube 3 in the axial direction is 3 mm to 5 mm, preferably 4 mm. If the overlapping length is too short, it will affect the stability of the capillary tube insertion; if the overlapping length is too long, it will bring inconvenience to the installation and cooperation and is also unnecessary.

[0033] Preferably, the outer diameter of the tail end joint 11 of the part that coincides with the insertion tube 3 is equal to the inner diameter of the insertion tube 3. In this way, the tail end joint 11 can just be inserted into the insertion tube 3 for a tight fit.

[0034] Preferably, the outer diameter of the tail end joint 11 that does not coincide with the insertion tube 3 is equal to the outer diameter of the tinned part of the insertion tube 3. When the tail end joint 11 is connected to the insertion tube 3, the outer diameters of the tail end joint 11 and the tinned part of the insertion tube 3 are equal, and a natural and smooth transition is formed between them. A section of tinned length is reserved on the outer circumferential surface of the insertion tube 3 of the part that coincides with the tail end joint, which is beneficial to the installation and cooperation with the tail end joint.

[0035] This connection structure further includes a capillary tube 4 for accommodating a steel wire rope. The tail end joint 11 is provided with a connection groove 12, and the capillary tube 4 is fixedly connected to the tail end joint 11 at the connection groove 12. Preferably, the capillary tube 4 is fixedly connected to the tail end joint 11 by welding.

[0036] Preferably, the connection groove 12 is a through groove. The so-called through groove means that two grooves with the same shape are symmetrically provided on the tail end joint 11 for fixing the capillary tube 4 respectively. This symmetric setting on both sides will make the force on the capillary tube and the tail end joint more balanced. Of course, if necessary, multiple through grooves can also be evenly provided on the tail end joint 11.

[0037] The present invention also relates to an endoscope, which includes the above-mentioned connection structure between the snake bone and the insertion tube.

[0038] The above schematically describes the present invention and its implementation manners. This description is not restrictive, and only one of the implementation manners of the present invention is shown in the drawings. The actual structure is not limited thereto. If those of ordinary skill in the art are inspired by it and design a structural manner similar to this technical solution without creative work without departing from the creative purpose of the present invention, it shall fall within the protection scope of the present invention.

Claims

1. A snake bone and insertion tube connection structure, comprising a snake bone (1) and an insertion tube (3), characterized in that: The tail end joint (11) of the snake bone is in a stepped circular shape and can be inserted into the insertion tube (3), so that the snake bone (1) and the insertion tube (3) are fixedly connected; The tail end joint (11) is in a stepped circular shape, which means that after the tail end joint (11) and the insertion tube (3) are engaged, the diameter of the overlapping portion of the tail end joint (11) is smaller than the diameter of the non-overlapping portion of the tail end joint (11).

2. The snake bone and insertion tube connection structure according to claim 1, characterized in that: The length of the overlapping portion between the caudal joint (11) and the insertion tube (3) along the axial direction is 3 mm to 5 mm.

3. The snake bone and insertion tube connection structure according to claim 2, characterized in that: The outer diameter of the tail end joint (11) which overlaps with the insertion tube (3) is equal to the inner diameter of the insertion tube (3).

4. The snake bone and insertion tube connection structure according to claim 3, characterized in that: The outer diameter of the tail end joint (11) which does not overlap with the insertion tube (3) is equal to the outer diameter of the tin-plated part of the insertion tube (3).

5. The snake bone and insertion tube connection structure according to any one of claims 1 to 4, characterized in that: The connection structure also includes a capillary tube (4), the caudal segment (11) is provided with a connection groove (12), and the capillary tube (4) is fixedly connected to the caudal segment (11) at the connection groove (12).

6. The snake bone and insertion tube connection structure according to claim 5, characterized in that: The connecting groove (12) is a through groove.

7. The snake bone and insertion tube connection structure according to claim 6, characterized in that: The capillary tube (4) is fixed to the tail end joint (11) by welding.

8. The snake bone and insertion tube connection structure according to any one of claims 1 to 4, characterized in that: The tail end bone segment (11) is fixedly connected to the insertion tube (3) by welding or gluing.

9. An endoscope, characterized in that: A snake bone and insertion tube connection structure comprising any one of claims 1 to 8.

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