Endoscope

Abstract

The invention belongs to the technical field of medical instruments, and discloses an endoscope. The endoscope comprises a snake bone joint, an instrument channel and a camera core wire. A traction wire threading structure is arranged on the snake bone joint and used for allowing a traction wire to penetrate through, and the wall thickness of the side, facing the center of the snake bone joint, of the traction wire threading structure is smaller than that of the side, away from the center of the snake bone joint, of the traction wire threading structure. The instrument channel is arranged in the snake bone joint, a cavity is formed in the instrument channel, and the axis of the instrument channel is parallel to the axis of the snake bone joint. According to the endoscope, the internal space of the snake bone joint can be enlarged, and meanwhile, the outer diameter of the snake bone joint is effectively reduced, so that the endoscope can enter extremely narrow cavities at lesion positions, such as digestive tracts of pediatric patients, seriously narrow lesion areas and the like, the opportunities for observing and treating the patients are achieved, and the endoscope is suitable for popularization and application. And the market coverage range and the application scene of the product are increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an endoscope. BACKGROUND

[0002] Medical endoscopes are widely used in the inspection and minimally invasive surgery of natural cavities of the human body such as the digestive tract and the respiratory tract. The snake bone segment at the end of the insertion part of the endoscope is usually composed of multiple snake bone joints. The snake bone segment is used for wiring or accommodating other functional components. The bending control of the snake bone segment is achieved by pulling the operation wire passing through the inside of the snake bone joint.

[0003] A wire slot is usually provided on the snake bone joint for the operation wire to pass through. At present, the structure design of the wire slot fails to optimize the arrangement of the limited space inside the snake bone joint, which leads to a large amount of valuable internal space being occupied inefficiently, resulting in space waste. Therefore, it is necessary to increase the outer diameter of the snake bone joint to ensure that the wire and functional components can be accommodated in the snake bone joint.

[0004] However, the large outer diameter of the snake bone joint makes it impossible for the endoscope to enter the extremely narrow cavity of the lesion, such as the digestive tract of pediatric patients and the severely narrow lesion area, thereby losing the opportunity to observe and treat these patients and limiting the market coverage and application scenarios of the product. SUMMARY

[0005] The purpose of the present application is to provide an endoscope that can improve the internal space utilization rate of the snake bone joint, effectively reduce the outer diameter of the snake bone joint, and improve the market coverage and application scenarios of the product.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] An endoscope is provided, comprising:

[0008] A snake bone joint is provided, wherein a traction wire threading structure is arranged on the snake bone joint, the traction wire threading structure is used for the traction wire to pass through, and the wall thickness of the traction wire threading structure on the side facing the center of the snake bone joint is smaller than the wall thickness of the traction wire threading structure on the side away from the center of the snake bone joint.

[0009] An instrument channel is arranged in the snake bone joint, a cavity is formed in the instrument channel, and the axis of the instrument channel is parallel to the axis of the snake bone joint.

[0010] In some possible embodiments, the thickness of the slot wall of the traction wire threading structure gradually thins from the side away from the center of the snake bone joint to the side close to the center of the snake bone joint.

[0011] In some possible implementation manners, the wall thickness of the traction wire threading structure on one side of the center of the snake joint is less than or equal to half of the wall thickness of the traction wire threading structure on the other side of the center of the snake joint.

[0012] In some possible implementation manners, two traction wire threading structures are arranged, and the two traction wire threading structures are respectively arranged on two sides of a line connecting the center of the instrument channel and the center of the snake joint, and the two traction wire threading structures are arranged on the same side of the center of the instrument channel.

[0013] In some possible implementation manners, an included angle between a line connecting the centers of the two traction wire threading structures and the center of the snake joint is less than 180°.

[0014] In some possible implementation manners, the included angle between the line connecting the centers of the two traction wire threading structures and the center of the snake joint is greater than 100°.

[0015] In some possible implementation manners, the two traction wire threading structures are symmetrically arranged relative to the line connecting the center of the instrument channel and the center of the snake joint.

[0016] In some possible implementation manners, the snake joint part is bent towards the center of the snake joint to form the traction wire threading structure.

[0017] In some possible implementation manners, an inner wall of the snake joint is connected with a wire passing ring, and the wire passing ring forms the traction wire threading structure.

[0018] In some possible implementation manners, a plurality of snake joints are arranged, and the plurality of snake joints are sequentially hinged along the axial direction.

[0019] Advantages of the present application:

[0020] The present application provides an endoscope. The endoscope comprises a snake joint and an instrument channel. The snake joint is provided with a traction wire threading structure for the traction wire to pass through. The wall thickness of the traction wire threading structure on the side towards the center of the snake joint is smaller than the wall thickness of the traction wire threading structure on the side away from the center of the snake joint. By thinning the wall thickness of the traction wire threading structure on the side towards the center of the snake joint, the internal space of the snake joint can be increased, and at the same time, the wall thickness of the traction wire threading structure on the side away from the center of the snake joint remains unchanged, ensuring that the traction wire threading structure has a certain strength. The instrument channel is arranged in the snake joint, a cavity is formed in the instrument channel, and the axis of the instrument channel is parallel to the axis of the snake joint. In this way, the utilization rate of the internal space of the snake joint can be improved, and space waste can be avoided. The endoscope of the present embodiment can increase the internal space of the snake joint while effectively reducing the outer diameter of the snake joint, so that the endoscope can enter extremely narrow cavities in the lesion site, such as the digestive tract of pediatric patients, severely narrow lesion regions, etc., thereby providing an opportunity for observation and treatment of these patients, and increasing the market coverage and application scenarios of the product. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cross-sectional view of the endoscope provided by the first embodiment of the present application;

[0022] Figure 2 is a cross-sectional view of the endoscope provided by the second embodiment of the present application.

[0023] In the drawings:

[0024] 1, snake joint; 11, traction wire threading structure; 12, steel wire passing ring; 2, instrument channel; 21, cavity; 3, camera core wire; 4, traction wire. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar parts or parts having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, can be mechanically connected, can be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] like Figure 1 As shown, the design of the traction wire threading structure 11 on the serpentine joint 1 of the medical endoscope fails to optimize the arrangement of the limited internal space of the serpentine joint 1. This results in a large amount of valuable internal space being inefficiently occupied, leading to space waste. It is necessary to increase the outer diameter of the serpentine joint 1 to ensure that the wires and functional components can be accommodated within it. However, an excessively large outer diameter of the serpentine joint 1 prevents the endoscope from entering extremely narrow cavities at lesion sites, such as the digestive tract of pediatric patients or severely narrowed lesion areas, thus losing the opportunity to observe and treat these patients and limiting the product's market coverage and application scenarios. Therefore, this embodiment designs an endoscope that can improve the utilization rate of the internal space of the serpentine joint 1, effectively reduce the outer diameter of the serpentine joint 1, and expand the product's market coverage and application scenarios.

[0031] The endoscope provided in this embodiment includes a serpentine joint 1 and an instrument channel 2. A traction wire threading structure 11 is provided on the serpentine joint 1 for the traction wire 4 to pass through. The wall thickness of the traction wire threading structure 11 on the side facing the center of the serpentine joint 1 is less than the wall thickness on the side away from the center of the serpentine joint 1. By thinning the wall thickness of the traction wire threading structure 11 on the side facing the center of the serpentine joint 1, the internal space of the serpentine joint 1 can be increased. At the same time, the wall thickness of the traction wire threading structure 11 on the side away from the center of the serpentine joint 1 remains unchanged, ensuring that the traction wire threading structure 11 has a certain strength. The instrument channel 2 is disposed within the serpentine joint 1, forming a cavity 21. The axis of the instrument channel 2 is parallel to the axis of the serpentine joint 1. This arrangement can improve the utilization rate of the internal space of the serpentine joint 1 and avoid space waste.

[0032] Specifically, the endoscope further comprises a camera core wire 3 arranged in the snake joint 1, the camera core wire 3 extends along the axial direction of the snake joint 1, and the outer diameter of the camera core wire 3 is smaller than the outer diameter of the instrument channel 2. The instrument channel 2 and the camera core wire 3 are arranged in close contact with the inner wall of the snake joint 1, the axis of the instrument channel 2, the axis of the snake joint 1 and the axis of the camera core wire 3 are in the same plane, and the utilization rate of the internal space of the snake joint 1 is further improved. The traction wire 4 can be a steel wire.

[0033] The endoscope of the embodiment can effectively reduce the outer diameter of the snake joint 1 while increasing the internal space of the snake joint 1, so that the endoscope can enter the extremely narrow cavity of the lesion site, such as the digestive tract of a pediatric patient, a severely narrow lesion region, etc., thereby providing an opportunity for observation and treatment of such patients and increasing the market coverage and application scenarios of the product.

[0034] Optionally, part of the snake joint 1 is bent towards the center of the snake joint 1 to form a traction wire threading structure 11. Specifically, a cut is cut on the snake joint 1 by laser cutting, and the parts on both sides of the cut are bent towards the center of the snake joint 1, and the bent snake joint 1 is connected by a pressing process to form the traction wire threading structure 11, so that the traction wire 4 passes through.

[0035] Optionally, the wall thickness of the traction wire threading structure 11 gradually thins from the side away from the center of the snake joint 1 to the side close to the center of the snake joint 1, that is, the internal space of the snake joint 1 can be increased, stress concentration can be avoided, and the structural strength of the traction wire threading structure 11 can be improved, so that the internal space occupancy rate of the snake joint 1 is improved without affecting the service life and bending state of the endoscope, and the working outer diameter of the endoscope is reduced.

[0036] Optionally, the wall thickness of the side of the traction wire threading structure 11 towards the center of the snake joint 1 is less than or equal to half of the wall thickness of the side of the traction wire threading structure 11 away from the center of the snake joint 1, so as to avoid that the groove wall of the side of the traction wire threading structure 11 towards the center of the snake joint 1 is too thin to reduce the strength of the traction wire threading structure 11. Specifically, the wall thickness of the side of the traction wire threading structure 11 towards the center of the snake joint 1 is X, and the wall thickness of the side of the traction wire threading structure 11 away from the center of the snake joint 1 is T. Wherein, X is greater than or equal to 0.5T, and X is less than T. X can be 0.6T, 0.7T, 0.8T or 0.9T, etc., which is not limited in the embodiment.

[0037] Optionally, two traction wire threading structures 11 are provided, and the two traction wire threading structures 11 are located on both sides of the line connecting the center of the instrument channel 2 and the center of the snake joint 1, and one traction wire 4 is threaded in each of the two traction wire threading structures 11, and the two traction wires 4 facilitate the control of the movement of the snake joint 1. The two traction wire threading structures 11 are located on the same side of the center of the instrument channel 2, thereby improving the utilization rate of the internal space of the snake joint 1. In other embodiments, the traction wire threading structure 11 can also be provided in multiple numbers.

[0038] Optionally, the angle between the line connecting the center of the two traction wire threading structures 11 and the center of the snake joint 1 is less than 180°, thereby further improving the utilization rate of the internal space of the snake joint 1, ensuring that the instrument channel 2 with the maximum outer diameter can be placed within the effective inner diameter range of the snake joint 1, and effectively avoiding the compression of the instrument channel 2 by the sidewall of the traction wire threading structure 11, avoiding the limitation of the movement space of the components in the snake joint 1, and improving the smoothness of the components passing through the snake joint 1.

[0039] Specifically, since the outer diameter of the camera core wire 3 is smaller than the outer diameter of the instrument channel 2, the two traction wire threading structures 11 are arranged on the side close to the camera core wire 3, so that a small installation space and a large installation space are formed in the internal space of the snake joint 1, the camera core wire 3 is located in the small installation space, and the instrument channel 2 is located in the large installation space, thereby fully utilizing the internal space of the snake joint 1, and thus reducing the outer diameter of the snake joint 1.

[0040] Optionally, the angle between the line connecting the center of the two traction wire threading structures 11 and the center of the snake joint 1 is greater than 100°, so that the small installation space has a certain size, and the camera core wire 3 can pass through the small installation space. Specifically, the angle between the line connecting the center of the two traction wire threading structures 11 and the center of the snake joint 1 can be 120°, 140°, 150°, or 170°, and the like, and the present embodiment does not limit the same.

[0041] Optionally, the two traction wire threading structures 11 are symmetrically arranged relative to the line connecting the center of the instrument channel 2 and the center of the snake joint 1. Specifically, the two traction wire threading structures 11 are symmetrically arranged at an angle N° in the axial cross section of the snake joint 1, wherein N is less than 40. In other embodiments, the two traction wire threading structures 11 can also be asymmetrically arranged, as long as the camera core wire 3 can pass through the small installation space and the instrument channel 2 can pass through the large installation space.

[0042] Optionally, a plurality of snake joints 1 are provided, and the plurality of snake joints 1 are sequentially hinged along the axial direction to form a snake segment.

[0043] Embodiment two:

[0044] As Figure 2As shown, the difference between the embodiment one and the embodiment two is that in the embodiment two, the inner wall of the snake bone joint 1 is connected with a wire passing ring 12, and the wire passing ring 12 forms a traction wire threading structure 11. Specifically, the wall thickness of the wire passing ring 12 on the side towards the center of the snake bone joint 1 is smaller than the wall thickness of the wire passing ring 12 on the side away from the center of the snake bone joint 1. The wire passing ring 12 is welded to the inner wall of the snake bone joint 1.

[0045] Obviously, the above embodiments of the present application are merely exemplary for clear illustration of the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An endoscope, characterized by, The application relates to a snake bone joint (1) provided with a traction wire threading structure (11) for a traction wire (4) to pass through, wherein the wall thickness of the traction wire threading structure (11) on the side close to the center of the snake bone joint (1) is smaller than the wall thickness of the traction wire threading structure (11) on the side away from the center of the snake bone joint (1). An instrument channel (2) is arranged in the snake bone joint (1), and a cavity (21) is formed in the instrument channel (2), and the axis of the instrument channel (2) is parallel to the axis of the snake bone joint (1). The wall thickness of the traction wire threading structure (11) gradually decreases from the side away from the center of the snake bone joint (1) to the side close to the center of the snake bone joint (1).

2. The endoscope of claim 1, wherein, The wall thickness of the traction wire threading structure (11) on the side close to the center of the snake bone joint (1) is smaller than or equal to half of the wall thickness of the traction wire threading structure (11) on the side away from the center of the snake bone joint (1).

3. The endoscope of claim 2, wherein, Two traction wire threading structures (11) are arranged on the two sides of the line connecting the center of the instrument channel (2) and the center of the snake bone joint (1), and the two traction wire threading structures (11) are located on the same side of the center of the instrument channel (2).

4. The endoscope of claim 1, wherein, The angle between the line connecting the center of the two traction wire threading structures (11) and the center of the snake bone joint (1) is smaller than 180 degrees.

5. The endoscope of claim 4, wherein, The angle between the line connecting the center of the two traction wire threading structures (11) and the center of the snake bone joint (1) is greater than 100 degrees.

6. The endoscope of claim 5, wherein, The two traction wire threading structures (11) are symmetrically arranged relative to the line connecting the center of the instrument channel (2) and the center of the snake bone joint (1).

7. The endoscope of claim 4, wherein, Part of the snake bone joint (1) is bent towards the center of the snake bone joint (1) to form the traction wire threading structure (11).

8. The endoscope of any one of claims 1-7, wherein, An over-wire ring (12) is connected to the inner wall of the snake bone joint (1), and the over-wire ring (12) forms the traction wire threading structure (11).

9. The endoscope of any one of claims 1-7, wherein, A plurality of snake bone joints (1) are arranged in sequence along the axial direction.

10. The endoscope of any one of claims 1-7, wherein, ​

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