Double-curvature snake bone structure, insertion part and endoscope

Abstract

The invention relates to the technical field of medical instruments, in particular to a double-curvature snake bone structure, an insertion part and an endoscope. The double-curvature snake bone structure comprises a first snake bone section, a second snake bone section, a third snake bone section, a fourth snake bone section and a fifth snake bone section, the first snake bone section, the second snake bone section and the third snake bone section are sequentially connected, the fifth snake bone section is connected with the near end of the first snake bone section, and the fourth snake bone section is connected with the far end of the third snake bone section; after the double-curvature snake bone structure is bent, the curvature center point of the first snake bone section is set to be R, the curvature center point of the third snake bone section is set to be T, the horizontal distance between the point R and the point T is set to be c, the vertical distance between the point R and the point T is set to be d, the distances c and d are limited, then the form of the whole snake bone structure is limited, and the double-curvature snake bone structure can meet the large-angle clinical requirement of an endoscope.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a double curvature snake bone structure, an insertion part and an endoscope. Background Art

[0002] Endoscopes are commonly used medical detection instruments, which can be used to see lesions that cannot be shown by X-rays. When an existing endoscope is used to examine the human kidney, the distal end of the endoscope needs to be bent at a certain angle, usually by a snake bone.

[0003] However, the renal pelvis of the human kidney has its own structural characteristics, which are characterized by a small area, small calyces, and concentrated distribution in the upper calyces of the renal pelvis, and a large area, many calyces, and scattered distribution in the lower calyces of the renal pelvis. Figure 1 As shown, a snake bone is needed to provide a larger field of view for a comprehensive inspection.

[0004] Prior art CN210300919U discloses an electronic endoscope snake bone, comprising a front snake bone ring, a front snake bone segment, a rear snake bone segment and a rear snake bone ring riveted in sequence, the front snake bone segment comprising a group of front snake bone nodes, the rear snake bone segment comprising a group of rear snake bone nodes, one side of the front snake bone node is symmetrically provided with two first hinge rings, the other side of the front snake bone node is symmetrically provided with two second hinge rings, one side of the rear snake bone node is symmetrically provided with two third hinge rings, and the other side of the rear snake bone node is symmetrically provided with two fourth hinge rings, an angle is formed between the edges of two adjacent front snake bone nodes in the front snake bone segment; an angle is formed between the edges of one side of two adjacent rear snake bone nodes in the rear snake bone segment; so that the snake bone has a small upward bending angle and a large downward bending angle, which meets the different requirements of the upward and downward extension of the renal pelvis, and is not easy to be damaged and has a prolonged service life.

[0005] The above-mentioned prior art realizes the control of the curvature radius of the snake bone segment by limiting the reduced edge of the snake bone joint. Prior art CN218651747U discloses a proximal snake bone segment, a snake bone assembly, an insertion part and an endoscope. Among them, a proximal snake bone segment includes a plurality of proximal snake bone units, and the plurality of proximal snake bone units are rotatably connected; the proximal snake bone units are connected in the first radial direction by a limiting structure, and the first radial direction is perpendicular to the rotation axis of the proximal snake bone unit; from the distal end to the proximal end of the proximal snake bone segment, the curvature radius of the proximal snake bone segment is gradually reduced by the limiting structure.

[0006] This prior art also limits the radius of curvature of the serpentine segment to gradually increase from the distal end to the proximal end to adapt to the structural characteristics of the kidney, but there is no limit on the overall bending shape of the serpentine segment, which cannot meet some large-angle clinical needs. Summary of the invention

[0007] In order to solve the above technical problems existing in the prior art, the present invention provides a double curvature snake bone structure, an insertion part and an endoscope.

[0008] To achieve the above object, the technical solution of the present invention is as follows:

[0009] In a first aspect, the present invention provides a double curvature snake bone structure, comprising a first snake bone segment, a second snake bone segment, a third snake bone segment, a fourth snake bone segment and a fifth snake bone segment, wherein the first snake bone segment, the second snake bone segment and the third snake bone segment are connected in sequence, the fifth snake bone segment is connected to the proximal end of the first snake bone segment, and the fourth snake bone segment is connected to the distal end of the third snake bone segment;

[0010] A coordinate system is established through the axis of the fifth serpentine segment, the Y axis of the coordinate system is the axis of the fifth serpentine segment, and the X axis of the coordinate system is perpendicular to the Y axis; after the hyperbolic serpentine structure is bent, the center point of curvature of the first serpentine segment is set to R, the center point of curvature of the third serpentine segment is set to T, the X-direction distance between point R and point T is set to c, and the Y-direction distance between point R and point T is set to d, then

[0011]

[0012] In the above formula, A and B are constants, both of which are arbitrary numbers between 0.8 and 1; b is the radius of curvature of the third serpentine segment.

[0013] Furthermore, the radius of curvature of the first snake bone segment is a, then a=2b.

[0014] Furthermore, the first snake bone segment includes a plurality of first snake bone nodes, and adjacent first snake bone nodes are connected by riveting.

[0015] Furthermore, first hinge rings are arranged on both sides of the first snake bone segment, and both side edges of the first snake bone segment taper upward and downward with the first hinge ring as the center.

[0016] Furthermore, the reduction angle α of the edges on both sides of the first serpentine segment is 0-10°.

[0017] Furthermore, the third snake bone segment includes a plurality of third snake bone nodes, and adjacent third snake bone nodes are connected by riveting.

[0018] Furthermore, a third hinge ring is arranged on both sides of the third snake bone segment, and both side edges of the third snake bone segment are tapered upward and downward with the third hinge ring as the center.

[0019] Furthermore, the reduction angle β of the edges on both sides of the third serpentine segment is 0-10°.

[0020] In a second aspect, the present invention provides an insertion portion, which includes an insertion tube and the aforementioned double-curvature snake-bone structure, wherein the insertion tube is connected to a fifth snake-bone segment of the double-curvature snake-bone structure.

[0021] In a third aspect, the present invention provides an endoscope, comprising a handle portion and the above-mentioned insertion portion, wherein the handle portion is capable of controlling the bending of the double curvature serpentine structure of the insertion portion.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The double-curvature serpentine structure provided by the present invention limits the relative positions of the centers of curvature of the first serpentine segment and the third serpentine segment, thereby limiting the shape of the entire serpentine structure, so that the serpentine structure can be suitable for the large-angle clinical needs of the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the morphology of the snake bone structure in the renal pelvis in the prior art.

[0025] Figure 2 It is a schematic diagram of the double curvature snake bone structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the first snake bone segment.

[0027] Figure 4 This is a schematic diagram of the structure of the first snake bone segment.

[0028] Figure 5 This is a schematic diagram of the structure of the third snake bone segment.

[0029] Figure 6 This is a schematic diagram of the structure of the third snake bone segment.

[0030] Figure 7 It is a schematic diagram of the bending shape when the present invention is applied to renal pelvis examination.

[0031] Description of reference numerals:

[0032] 1-first snake bone segment, 11-first snake bone joint, 2-second snake bone joint, 3-third snake bone segment, 31-third snake bone joint, 4-fourth snake bone joint, 5-fifth snake bone joint. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the protection scope of the present invention.

[0034] It should be noted that, unless otherwise specifically stated, the relative arrangements of components and steps, and numerical expressions set forth in these embodiments should not be construed as limiting the scope of the present invention.

[0035] The following description of the exemplary embodiments is merely illustrative and is not intended to limit the present invention and its application or use in any sense. Techniques, methods and devices known to ordinary technicians in the relevant field may not be discussed in detail here, but where applicable, these techniques, methods and devices should be considered as part of this specification.

[0036] Embodiment 1

[0037] This embodiment provides a double curvature snake bone structure, such as Figure 2 As shown, it includes a first snake bone segment 1, a second snake bone segment 2, a third snake bone segment 3, a fourth snake bone segment 4 and a fifth snake bone segment 5. The first snake bone segment 1, the second snake bone segment 2 and the third snake bone segment 3 are connected in sequence, the fifth snake bone segment 5 is connected to the proximal end of the first snake bone segment 1, and the fourth snake bone segment 4 is connected to the distal end of the third snake bone segment 3;

[0038] like Figure 3 As shown, the first snake bone segment 1 includes a plurality of first snake bone segments 11, and adjacent first snake bone segments 11 are connected by riveting. By controlling the cutting angle of the edge of the first snake bone segment 11, the first snake bone segment 11 can be assembled into snake bone segments with different curvatures. Figure 4 As shown, first hinge rings are provided on both sides of the first serpentine joint 11, and adjacent first serpentine joints 11 are riveted by the first hinge rings, and adjacent first serpentine joints 11 can rotate relative to each other at a certain angle. Both side edges of the first serpentine joint 11 are tapered upward and downward with the first hinge ring as the center. The tapering angle α of the side edges of the first serpentine joint 11 is 0-10°. In this embodiment, α is 2.5°. In other embodiments, α can also be other angles.

[0039] The second snake bone segment 2 is a transition section between the first snake bone segment 1 and the third snake bone segment 3. Second hinge rings are arranged on both sides of the second snake bone segment 2 for connecting the first snake bone segment 1 and the third snake bone segment 3. The edge reduction angle of the second snake bone segment 2 connected to the first snake bone segment 1 is the same as that of the first snake bone segment 11, and the edge reduction angle of the second snake bone segment 2 connected to the third snake bone segment 3 is the same as that of the third snake bone segment 31.

[0040] like Figure 5 As shown, the third serpentine segment 3 includes a plurality of third serpentine joints 31, and adjacent third serpentine joints 31 are connected by riveting.

[0041] like Figure 6As shown, the length of the third serpentine segment 31 is less than that of the first serpentine segment 11, and third hinge rings are arranged on both sides of the third serpentine segment 31. Adjacent third serpentine segments 31 are riveted by the third hinge rings, and adjacent third serpentine segments 31 can rotate relative to each other at a certain angle; both side edges of the third serpentine segment 31 are reduced upward and downward with the third hinge ring as the center. The reduction angle β of the two side edges of the third serpentine segment 31 is 0-10°. In this embodiment, β is 2°. In other embodiments, β can also adopt other angles.

[0042] like Figure 7 As shown, a coordinate system is established through the axis of the fifth serpentine segment, the Y axis of the coordinate system is the axis of the fifth serpentine segment, and the X axis of the coordinate system is perpendicular to the Y axis; after the hyperbolic serpentine structure is bent, the center point of curvature of the first serpentine segment 1 is set to R, the center point of curvature of the third serpentine segment 3 is set to T, the X-direction distance between point R and point T is set to c, and the Y-direction distance between point R and point T is set to d, then

[0043]

[0044] In the above formula, A and B are constants, both of which are arbitrary numbers between 0.8 and 1; b is the radius of curvature of the third serpentine segment.

[0045] In addition, the curvature radius of the first snake bone segment 11 is a, and a=2b.

[0046] Embodiment 2

[0047] This embodiment provides an insertion part, which is used in an endoscope. The insertion part includes an insertion tube and the double curvature snake bone structure provided in the first embodiment. The insertion tube is connected to the fifth snake bone segment 5 of the double curvature snake bone structure.

[0048] Embodiment 3

[0049] This embodiment provides an endoscope, comprising a handle portion and the insertion portion provided in the second embodiment, wherein the handle portion can control the bending of the double curvature snake-bone structure of the insertion portion.

[0050] The above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, a person skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A double curvature snake bone structure, comprising a first snake bone segment, a second snake bone segment, a third snake bone segment, a fourth snake bone segment and a fifth snake bone segment, wherein the first snake bone segment, the second snake bone segment and the third snake bone segment are connected in sequence, the fifth snake bone segment is connected to the proximal end of the first snake bone segment, and the fourth snake bone segment is connected to the distal end of the third snake bone segment; characterized in that: A coordinate system is established through the axis of the fifth serpentine segment, the Y axis of the coordinate system is the axis of the fifth serpentine segment, and the X axis of the coordinate system is perpendicular to the Y axis; after the hyperbolic serpentine structure is bent, the center point of curvature of the first serpentine segment is set to R, the center point of curvature of the third serpentine segment is set to T, the X-direction distance between point R and point T is set to c, and the Y-direction distance between point R and point T is set to d, then In the above formula, A and B are constants, both of which are arbitrary numbers between 0.8 and 1; b is the radius of curvature of the third serpentine segment.

2. The double curvature snake bone structure according to claim 1, characterized in that: The radius of curvature of the first snake bone segment is a, then a=2b.

3. The double curvature snake bone structure according to claim 1, characterized in that: The first snake bone segment includes a plurality of first snake bone nodes, and adjacent first snake bone nodes are connected by riveting.

4. The double curvature snake bone structure according to claim 3, characterized in that: First hinge rings are arranged on both sides of the first snake bone segment, and both side edges of the first snake bone segment shrink upward and downward with the first hinge ring as the center.

5. The double curvature snake bone structure according to claim 4, characterized in that: The reduction angle α of the edges on both sides of the first serpentine segment is 0-10°.

6. The double curvature snake bone structure according to claim 1, characterized in that: The third snake bone segment includes a plurality of third snake bone nodes, and adjacent third snake bone nodes are connected by riveting.

7. The double curvature snake bone structure according to claim 6, characterized in that: A third hinge ring is arranged on both sides of the third snake bone segment, and both side edges of the third snake bone segment shrink upward and downward with the third hinge ring as the center.

8. The double curvature snake bone structure according to claim 7, characterized in that: The reduction angle β of the two side edges of the third serpentine segment is 0-10°.

9. An insertion portion, characterized in that: The insertion portion includes an insertion tube and the double-curvature snake bone structure according to any one of claims 1 to 8, and the insertion tube is connected to the fifth snake bone segment of the double-curvature snake bone structure.

10. An endoscope, characterized in that: The invention comprises a handle part and the insertion part according to claim 9, wherein the handle part can control the bending of the double curvature serpentine structure of the insertion part.

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