CN220045846U - Endoscope and reducing snake bone thereof - Google Patents

Abstract

The utility model discloses an endoscope and a contracted snake bone thereof, belonging to the technical field of instruments for inspecting cavities or tubes of human bodies. The reducing snake bone comprises a first body, a second body and traction steel wires, wherein the first body is connected with the second body, the first body and the second body are both provided with limiting structures of the traction steel wires, the limiting structures fix the traction steel wires on the first body and the second body, and at least part of the radial dimension of the first body is larger than that of the second body; the second body is provided with a plurality of first bending grooves and second bending grooves, the first bending grooves and the second bending grooves are distributed in an axial staggered mode or are distributed relatively along the second body, and when the traction steel wire is pulled, the first bending grooves and the second bending grooves enable the first body and the second body to be bent. The endoscope of the present utility model includes a necked snake bone. The utility model is mainly used for the examination or operation of human viscera.

Description

Endoscope and reducing snake bone thereof

Technical Field

The utility model relates to the technical field of instruments for inspecting cavities or tubes of a human body, in particular to an endoscope and a contracted snake bone thereof.

Background

The endoscope is a detection instrument integrating traditional optics, ergonomics, precision machinery, modern electronics, mathematics, software and the like and is used for detecting human viscera. Endoscopes generally enter the interior of the cavity of a human organ through a relatively narrow passageway. To alleviate pain and discomfort to the patient, the outer diameter of the endoscope should be reduced as much as possible, while the internal instrument channel of the endoscope should be enlarged as much as possible, to perform the corresponding surgical procedure. However, in the prior art, the outer diameter is extremely thin on the premise of ensuring that the internal instrument channel of the endoscope is sufficiently large, but the use in the operation is still not ideal, so how to further reduce the discomfort of a patient is a technical problem to be solved in the development and design of the endoscope.

For the endoscope, the head end of the endoscope is provided with the structures such as an image pickup module, a light source, an instrument channel and the like, the outer diameter size cannot be reduced, the part behind the head end of the endoscope is generally only provided with the instrument channel, a cable wire and a traction steel wire, and the outer diameter size is difficult to realize although being further reduced, because the stamping difficulty of the snake bone is greatly improved when the outer diameter of the snake bone is reduced.

In the related art, chinese patent literature: CN218651745U provides a soft lens and a ureteral pyeloscope system using the same, the soft lens main body comprises a hose and a lens bracket connected to the outer end of the hose through a bending piece, the bending piece and the lens bracket form the front section of the soft lens main body, the hose is the rest part of the soft lens main body; the outer diameter of the anterior segment of the soft mirror body is greater than the outer diameter of the remainder of the soft mirror body. However, the purpose that the outer diameter size of the front section of the soft lens main body of the technical proposal is larger than the outer diameter size of the rest parts of the soft lens main body is not to relieve the pain of the patient, and the circumferential sizes of the whole snake bones of the technical proposal are the same, and no technical teaching is provided for solving the technical problem that the pain is caused by the larger endoscope size of the patient.

Because the portion behind the endoscope head has the possibility of reducing the outer diameter, the patient only needs to bear the short pain of the endoscope head passing through the narrow channel during the operation, and when the endoscope head enters the internal space of the viscera, the discomfort of the patient can be relieved because the portion behind the endoscope head is further thinned. The endoscope snake bone is wrapped by TPU and other materials, so that if the technical problems are solved, providing the snake bone with different radial dimensions is critical.

Disclosure of Invention

1. Technical problem

The utility model aims to overcome the defect that long-time uncomfortable feeling is generated in the treatment process of a patient due to thicker outer diameter of an endoscope in the using process of the endoscope in the prior art, and provides the endoscope and the contracted snake bone thereof, which are used for reducing the uncomfortable feeling of the patient in the using process of the endoscope.

2. Technical proposal

To achieve the above object, a first aspect of the present utility model relates to a reduced diameter snake bone comprising:

first body, second body and traction steel wire, first body and second body connect:

the first body and the second body are both provided with limiting structures of traction steel wires, the limiting structures fix the traction steel wires on the first body and the second body, and the radial dimension of at least part of the first body is larger than that of the second body;

the second body is provided with a plurality of first bending grooves and second bending grooves, the first bending grooves and the second bending grooves are distributed in an axial staggered mode or in a relative mode along the second body, and when the traction steel wire is pulled, the first bending grooves and the second bending grooves enable the first body and the second body to be bent.

As a further improvement, the reduced diameter snake bone comprises a transition section, one end of the transition section is connected with the first body, the other end of the transition section is connected with the second body, and the first body, the second body and the transition section are integrally formed.

As a further improvement, the first body is provided with a traction hole, and the traction hole is a limiting structure of the first body;

the limit structure of the second body comprises a plurality of mounting grooves and limit pieces, the limit pieces are mounted in the mounting grooves, the limit pieces are provided with limit holes, at least part of the limit holes are located in the second body, and the traction holes and the limit holes are used for mounting traction steel wires.

As a further improvement, the second body and the limiting piece are of a split type design.

As a further improvement, the limiting piece comprises an integrally formed arc-shaped piece and a limiting block, the inner side wall of the limiting block encloses into a limiting hole, when the limiting piece is installed in the installation groove, the inner side wall of the arc-shaped piece is attached to the outer side wall of the second body, and the limiting block is at least partially located inside the second body.

As a further improvement, the outer side wall of the limiting block and the inner side wall of the arc-shaped piece form a hook-shaped groove, and the hook-shaped groove enables the limiting block to be clamped and fixed in the mounting groove.

As a further improvement, the outer side wall and the inner side wall of the transition section are curved surfaces, and the transition section enables smooth transition between the first body and the second body.

As a further improvement, the plurality of mounting grooves are divided into a first row of mounting grooves and a second row of mounting grooves along the axial direction of the second body, the first row of mounting grooves is opposite to the second row of mounting grooves, and the plurality of mounting grooves divided into two rows are distributed in a staggered manner along the axial direction of the second body.

As a further improvement, in the first column of mounting grooves, three first bending grooves are arranged between the mounting groove closest to the first body and the mounting groove adjacent to the first body, and two first bending grooves are arranged between the other adjacent mounting grooves; in the second column of mounting grooves, three second bending grooves are formed between the mounting groove closest to the first body and the mounting groove adjacent to the mounting groove, and two second bending grooves are formed between the other adjacent mounting grooves.

As a further improvement, the opening size of the plurality of first curved grooves is the same as the opening size of the plurality of second curved grooves.

As a further improvement, the sizes of the first bending grooves are the same, the sizes of the second bending grooves close to the first body are the same as the sizes of the first bending grooves, and the sizes of the second bending grooves far away from the first body are smaller than the sizes of the first bending grooves, so that the bending angle of the contracted snake bone in the direction of the first bending grooves is larger than that in the direction of the second bending grooves.

In a first aspect, the utility model relates to an endoscope comprising:

the connecting device is characterized in that the bending part comprises the contracted snake bone of the first aspect, and the head end part comprises a head end seat which is connected with the first body.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

the utility model discloses a reducing snake bone, which comprises a first body, a second body, a transition section and a traction steel wire, wherein the first body is connected with the second body through the transition section, and the radial dimension of the second body is smaller than that of the first body, so that a patient only needs to bear short pain in the process that the front end of an endoscope enters into a human organ, and after the front end of the endoscope enters into a cavity of the organ, the discomfort of the patient is greatly reduced. Meanwhile, the design of the integrated snake bone is adopted, so that the stability of the use of the reduced snake bone is ensured under the condition that the outer diameter of the second body is thinner.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification. The drawings of the illustrative embodiments of the utility model and their description are for the purpose of illustrating the utility model and are not to be construed as unduly limiting the utility model.

In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.

FIG. 1 is a schematic view of a reduced diameter snake bone according to some embodiments of the utility model;

FIG. 2 is a front view of a reduced snake bone according to some embodiments of the utility model;

FIG. 3 is a schematic view of a second body, instrument channel and camera module connection according to some embodiments of the present utility model;

FIG. 4 is a schematic view illustrating the connection of a first body, a second body, an instrument channel, and a camera module according to some embodiments of the present utility model;

FIG. 5 is a schematic diagram of a second body structure according to some embodiments of the present utility model;

FIG. 6 is a schematic view of a segmented snake bone according to the related art;

FIG. 7 is a schematic view of a first body structure according to some embodiments of the present utility model;

FIG. 8 is a schematic view of a limiting member according to some embodiments of the present utility model;

FIG. 9 is a schematic view of another view of the stopper of FIG. 8;

FIG. 10 is a schematic bottom view of a reduced snake bone according to some embodiments of the utility model;

FIG. 11 is a schematic top view of a reduced snake bone according to some embodiments of the utility model;

FIG. 12 is a schematic view of an endoscope in accordance with some embodiments of the present utility model;

fig. 13 is a schematic view of a head end seat according to some embodiments of the utility model.

Reference numerals in the schematic drawings illustrate:

100. reducing snake bone; 200. an endoscope;

110. a first body; 120. a second body; 130. a transition section; 140. traction steel wire; 150. a limiting piece;

111. a traction hole;

121. a first curved slot; 122. a second curved slot; 123. a mounting groove; 124. a first column of mounting slots; 125. a second column of mounting slots;

151. a limiting hole; 152. an arc-shaped sheet; 153. a limiting block; 154. a hook-shaped groove; 155. an intersection point A; 156. an intersection B;

210. a head end portion; 220. a bending portion; 230. an insertion section; 240. an operation unit; 250. a connection part; 260. a camera module; 270. an instrument channel;

211. a head end seat.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.

Furthermore, the terms "first," "second," and the like in the description of the present utility model, if any, are used for distinguishing the description only, and are not to be construed as indicating or implying relative importance, such as "first curved slot 121" and "second curved slot 122". The terms "horizontal", "vertical" and the like in the description of the present utility model, if any, do not denote that the component is required to be absolutely horizontal or overhanging, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the related art, the internal instrument channel of the endoscope needs to be large enough to ensure the surgical operation under the current technical conditions of materials and the like. On the premise of ensuring the normal use function of the endoscope, the outer diameter of the endoscope is extremely thin. Based on structural analysis of the endoscope, the front end of the endoscope integrates a camera shooting and light source instrument channel, while the rear end of the endoscope generally only needs an instrument channel, a cable wire and a steel wire. Therefore, the outer diameter of the rear end part of the endoscope is possibly further thinned, so that the patient only needs to bear short pain in the process that the front end of the endoscope enters the viscera of the human body, and the discomfort of the patient is greatly reduced after the front end of the endoscope enters the viscera cavity. How to solve the technical problem:

the utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

Referring to fig. 1 and 2, a reduced diameter snake bone according to the embodiment comprises: the first body 110, the second body 120 and the transition section 130, the first body 110 and the second body 120 being connected by the transition section 130. The first body 110, the second body 120 and the transition section 130 may be integrally formed, may be separately formed, or may be integrally formed by any two parts, and the other part is a single body. For example, the first body 110 and the transition section 130 are integrally formed, and the second body 120 is a separate body.

The first body 110 and the second body 120 are both cylindrical structures, and the radial dimension of the first body 110 is greater than the radial dimension of the second body 120. By cylindrical structure is meant that the cross-sections of the first body 110 and the second body 120 are both circular, and that the radial dimension of the first body 110 is greater than the radial dimension of the second body 120 is understood to mean that the outer diameter and the inner diameter of the first body 110 are both greater than the outer diameter and the inner diameter of the second body 120. Because the radial dimensions between the first body 110 and the second body 120 are different, the transition section 130 plays a role in transition between the first body 110 and the second body 120, specifically, the transition section 130 can adopt a smooth curved surface structure to connect the first body 110 and the second body 120, the connection part between the transition section 130 and the first body 110 and the second body 120 is a smooth transition, the problem of stress concentration is avoided, and meanwhile, the processing of the subsequent snake bone wrapping layer and other processes is facilitated.

Referring to fig. 3 and 4, the instrument channel 270 makes a small angular change when the instrument channel 270 extends out of the second body 120, in order to allow room for the camera module 260, etc. The camera module 260 is mainly integrated with the space where the first body 110 is located, the cable connected with the camera module 260 is arranged in the second body 120, and the outer diameter of the cable is far smaller than that of the camera module, so that the possibility of further reducing the outer diameter of the second body 120 is provided. The second body 120 has an inner diameter sufficient to accommodate the instrument channel 270 and the cable wires and snake bone traction wires 140. The technical proposal converts the discomfort of a patient in the endoscopic surgery treatment for a long time into transient discomfort.

However, shrinking the outer diameter of the second body 120 of the reduced snake bone 100 necessarily creates new technical problems, such as, in the field of snake bone stamping technology, the smaller the outer diameter of the snake bone tube, the higher the stamping difficulty for the snake bone tube, and the challenge for stability during use of the snake bone.

Referring to fig. 5, the second body 120 of the reduced-diameter snake bone 100 of the embodiment is an integral snake bone, and compared with the sectional snake bone as shown in fig. 6, first, the integral snake bone has no dislocation phenomenon of the sectional snake bone; secondly, the integrated snake bone still has resilience force even after fracture, and the phenomenon of blocking does not exist; furthermore, the integral snake bone has relatively thin requirements for materials relative to the sectional snake bone under the condition of the same size. Therefore, the use of the integral snake bone can still ensure the stability of the snake bone during the use process in the case that the outer diameter of the second body 120 is thinner.

Specifically, the second body 120 is provided with a plurality of first curved grooves 121 and second curved grooves 122. The first curved grooves 121 and the second curved grooves 122 are alternately or relatively distributed along the axial direction of the second body 120, as shown in fig. 5, the first curved grooves 121 and the second curved grooves 122 are alternately distributed along the axial direction of the second body 120. The first bending groove 121 and the second bending groove 122 can bend the reduced snake bone 100 in a specific direction by the traction steel wire 140 of the reduced snake bone 100.

Referring to fig. 4 and 7, the reduced diameter snake bone 100 has a traction wire 140, and the traction wire 140 needs to be fixed by means of a fixing structure of the traction wire 140 in the snake bone tube, so that bending of the reduced diameter snake bone 100 toward a specific bending angle can be achieved by operating the traction wire 140. The first body 110 is provided with a traction hole 111, the traction hole 111 is formed by concave part of the side wall of the first body 110, one end of the traction steel wire 140 passes through the traction hole 111, and the fixation of one end of the traction steel wire 140 is realized through various structures such as glue or bolts.

As for the fixing structure of the traction wire 140 in the second body 120, the same manner as the first body 110 is used to form the traction hole 111 for fixing the traction wire 140, but as the radial dimension of the second body 120 is further reduced as described above, the punching difficulty thereof is increased linearly.

Example 2

Referring to fig. 5, 8 and 9, the fixing structure of the traction wire 140 in the second body 120 is implemented by a combination of the stopper 150 and the installation groove 123. The second body 120 is provided with a plurality of mounting grooves 123 and corresponding limiting members 150, and the limiting members 150 are mounted in the mounting grooves 123.

The limiting member 150 is provided with a limiting hole 151, the limiting hole 151 is at least partially located inside the second body 120, and the traction hole 111 and the limiting hole 151 are used for installing the traction steel wire 140. The limiting piece 150 comprises an integrally formed arc-shaped piece 152 and a limiting block 153, wherein the inner side wall of the limiting block 153 encloses a limiting hole 151, when the limiting piece 150 is installed in the installation groove 123, the arc-shaped piece 152 is attached to the outer side wall of the second body 120, and the limiting block 153 is at least partially located inside the second body 120.

The radial dimension of the arc-shaped piece 152 is greater than the radial dimension of the mounting groove 123, so that the arc-shaped piece 152 is located outside the mounting groove 123, meanwhile, the radian of the inner side wall of the arc-shaped piece 152 is basically the same as that of the outer side wall of the second body 120, and when the limiting piece 150 is completely mounted in the mounting groove 123, the arc-shaped piece 152 is attached to the second body 120.

The side wall opposite to the inner side wall of the arc-shaped sheet 152 is the outer side wall of the arc-shaped sheet 152, the outer side wall of the arc-shaped sheet 152 adopts a smooth curved surface structure, and the outer side wall of the arc-shaped sheet 152 can be parallel to the inner side wall of the arc-shaped sheet 152, wherein the parallel refers to that the two side walls never intersect. The outer side walls of the arc-shaped pieces 152 may be non-parallel to the inner side walls of the arc-shaped pieces 152, and the outer side walls of the arc-shaped pieces 152 are designed in an arch shape, so that the two ends of the arc-shaped pieces 152 are thin and the middle is thick. The relationship between the inner and outer sidewalls of the arcuate segments 152, whether parallel or intersecting, will vary based on the function of the arcuate segments 152.

In this embodiment, the fixing structure of the traction steel wire 140 is formed by punching the wall of the snake bone pipe by means of the mounting groove 123 of the second body 120 and the limiting member 150, and the hole structure of the fixing traction steel wire 140 is formed by punching the wall of the snake bone pipe. The technical problem that the stamping difficulty of the snake bone tube is increased when the radial size of the second body 120 is reduced is solved.

Example 3

The second body 120 and the limiting member 150 are designed in a split type, and the limiting member 150 is connected to or separated from the second body 120 by inserting and pulling out the mounting groove 123. The split design of the second body 120 and the limiting member 150 has the advantage of simplifying the production process from the aspect of enterprise production, and the second body 120 and the limiting member 150 can be produced respectively and assembled afterwards; from the benefit aspect of the enterprise, if because the quality problem of partial locating part 150, directly change can, for the design of integral type, once there is technical problem in a part, will directly lead to the scrapping of whole snake bone pipe.

Example 4

In this embodiment, referring to fig. 9, the outer sidewall of the limiting block 153 and the inner sidewall of the arc-shaped piece 152 form a hook-shaped groove 154, and the hook-shaped groove 154 enables the limiting block 153 to be clamped and fixed in the mounting groove 123. Specifically, the limiting block 153 has a continuously variable curved surface, two ends of which respectively intersect with the inner side wall of the arc-shaped piece 152, one end forms at least one intersection point a, the other end forms an intersection point B, and the connection line between the intersection point a and the intersection point B is substantially equal to the radial dimension of the mounting groove 123. Keep away from arc piece 152 along crossing point A and crossing point B, stopper 153 size is slightly greater than the size of mounting groove 123 for stopper 153 chucking is firm in mounting groove 123, and along with stopper 153 keeps away from arc piece 152 again, stopper 153 size begins to diminish, and stopper 153 size is less than the size of mounting groove 123, so that stopper 153 inserts mounting groove 123.

Example 5

In the reduced snake bone of the embodiment, referring to fig. 10, fig. 10 is a bottom view of the reduced snake bone 100, and the inner side wall of the limiting hole 153 is at least partially located in the second body 120, so as to ensure that the limiting hole 153 is at least partially located in the second body 120. Meanwhile, referring to fig. 11, fig. 11 is a top view of the reduced snake bone 100, the traction hole 111 formed in the first body 110 is offset from the limit hole 153, so that the traction wire 140 should also bend correspondingly with the traction hole 111 and the limit hole 153.

The transition section 130 adopts a smooth curved surface structure to transition the first body 110 and the second body 120, which not only includes smooth transition of the outer sidewalls of the first body 110 and the second body 120, but also includes smooth transition of the inner sidewalls of the first body 110 and the second body 120. Therefore, the traction steel wires 140 are attached to the inner side walls of the first body 110 and the second body 120 at the traction holes 111 and the limit holes 153, and stress concentration is not generated with the first body 110 and the second body 120.

Example 6

Referring to fig. 1 and 2, in the reduced snake bone 100 of the embodiment, the plurality of mounting grooves 123 are divided into a first row of mounting grooves 124 and a second row of mounting grooves 125 along the axial direction of the second body 120, the first row of mounting grooves 124 is opposite to the second row of mounting grooves 125, and the plurality of mounting grooves 123 divided into two rows are distributed alternately along the axial direction of the second body 120.

The first bending groove 121 is on the same side as the first row of mounting grooves 124, the second bending groove 122 is on the same side as the second row of mounting grooves 125, and the first row of mounting grooves 124 and the second row of mounting grooves 125 respectively cooperate with the first bending groove 121 and the second bending groove 122 to determine the bending angle and the rotation direction of the reducing snake bone 100.

For example, the snake bones in two directions may have the same bending angle, and the snake bones in two directions may have different bending angles. In this example, the adjustment is performed by adjusting the first curved groove 121 and the second curved groove 122. When it is desired that the reduced snake bone 100 is rotated at the same angle in both directions, the first curved groove 121 and the second curved groove 122 opposite thereto have the same opening size. And when the rotation angles of the contracted snake bone 100 in the two directions are required to be different, the opening sizes of the first bending groove 121 and the second bending groove 122 opposite to the first bending groove are adjusted.

If the sizes of the first bending grooves 121 are the same, the sizes of the second bending grooves 122 close to the first body 110 are the same as the sizes of the first bending grooves 121, and the sizes of the second bending grooves 122 far from the first body are smaller than the sizes of the first bending grooves 121, so that the bending angle of the contracted snake bone towards the first bending grooves 121 is larger than the bending angle towards the second bending grooves 122.

Example 7

The first bending grooves 121 and the plurality of mounting grooves 123 constituting the first row of mounting grooves 124, and the second bending grooves 122 and the plurality of mounting grooves 123 constituting the second row of mounting grooves 125 are alternately arranged. The distribution structure between the first curved groove 121, the second curved groove 122 and the mounting groove 123 affects stability and usability of the snake bone structure.

Specifically, if the first row of mounting grooves 124 of the second body 120 is formed with only two mounting grooves 123, which are respectively located at one end and the other end of the second body 120, the control effect of the traction wire 140 on the second body 120 is greatly impaired. Also, if the mounting groove 123 is formed in the second body 120 too much, the stability of the overall structure of the reduced snake bone 100 is also affected. Therefore, the first and second curved grooves 121 and 122 and the mounting groove 123 provided between the second bodies 120 should be reasonably distributed.

In this embodiment, in the first column of mounting grooves 124, three first bending grooves 121 are disposed between the mounting groove 123 closest to the first body 110 and the mounting groove 123 adjacent thereto, and two first bending grooves 121 are disposed between the other adjacent mounting grooves 123; in the second row of mounting grooves 125, three second bending grooves 122 are provided between the mounting groove 123 closest to the first body 110 and the mounting groove 123 adjacent thereto, and two second bending grooves 122 are provided between the other adjacent mounting grooves 123. The distributed design ensures the stable control of the traction steel wires 140 on the contracted snake bone 100 and the overall stability of the contracted snake bone 100.

Example 8

The present embodiment relates to an endoscope 200, which includes a head end portion 210, a bending portion 220, an insertion portion 230, an operation portion 240, and a connection portion 250, which are sequentially connected, wherein the bending portion 220 and the insertion portion 230 are provided with the reduced-diameter snake bone 100 in the above embodiment, and the head end portion 210 of the endoscope includes a head end seat 211, and the head end seat 211 is connected to a first body 110.

The endoscope of this embodiment, the head end 210 will, under the condition of ensuring the installation space of the instrument channel 270 and the camera module 260, have a very small outer diameter of the head end 210, and at the same time, have a very small outer diameter of the bending portion 220 and the insertion portion 230 of the endoscope 200, so as to greatly reduce discomfort of a patient during an operation using the endoscope.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (12)

1. A reduced diameter snake bone comprising: first body (110), second body (120) and traction wire (140), first body (110) and second body (120) are connected, its characterized in that:

the first body (110) and the second body (120) are both provided with limiting structures of traction steel wires (140), the limiting structures fix the traction steel wires (140) on the first body (110) and the second body (120), and at least part of the radial dimension of the first body (110) is larger than that of the second body (120);

the second body (120) is provided with a plurality of first bending grooves (121) and second bending grooves (122), the first bending grooves (121) and the second bending grooves (122) are distributed in an axial staggered mode or in a relative mode along the second body (120), and when the traction steel wire (140) is pulled, the first bending grooves (121) and the second bending grooves (122) enable the first body (110) and the second body (120) to bend.

2. The reduced diameter snake bone of claim 1, wherein: the reducing snake bone comprises a transition section (130), one end of the transition section (130) is connected with the first body (110), the other end of the transition section (130) is connected with the second body (120), and the first body (110), the second body (120) and the transition section (130) are integrally formed.

3. The reduced diameter snake bone of claim 1, wherein: the first body (110) is provided with a traction hole (111), and the traction hole (111) is the limit structure of the first body (110);

the limiting structure of the second body (120) comprises a plurality of mounting grooves (123) and limiting pieces (150), the limiting pieces (150) are mounted on the mounting grooves (123), the limiting pieces (150) are provided with limiting holes (151), the limiting holes (151) are at least partially located in the second body (120), and the traction holes (111) and the limiting holes (151) are used for mounting the traction steel wires (140).

4. A reduced diameter snake bone according to claim 3, wherein: the second body (120) and the limiting piece (150) are of a split type design.

5. A reduced diameter snake bone according to claim 3, wherein: the limiting piece (150) comprises an arc-shaped piece (152) and a limiting block (153) which are integrally formed, the limiting hole (151) is formed in the surrounding mode of the inner side wall of the limiting block (153), when the limiting piece (150) is installed in the installation groove (123), the inner side wall of the arc-shaped piece (152) is attached to the outer side wall of the second body (120), and the limiting hole (151) is located at least partially inside the second body (120).

6. The reduced diameter snake bone of claim 5, wherein: the outer side wall of the limiting block (153) and the inner side wall of the arc-shaped sheet (152) form a hook-shaped groove (154), and the hook-shaped groove (154) enables the limiting block (153) to be clamped and fixed in the mounting groove (123).

7. The reduced diameter snake bone of claim 2, wherein: the outer side wall and the inner side wall of the transition section (130) are curved surfaces, and the transition section (130) enables smooth transition to be formed between the first body (110) and the second body (120).

8. A reduced diameter snake bone according to claim 3, wherein: the mounting grooves (123) are divided into a first row of mounting grooves (124) and a second row of mounting grooves (125) along the axial direction of the second body (120), the first row of mounting grooves (124) are opposite to the second row of mounting grooves (125), and the mounting grooves (123) divided into two rows are distributed in a staggered manner along the axial direction of the second body (120).

9. The reduced diameter snake bone of claim 8, wherein: among the first column of mounting grooves (124), three first bending grooves (121) are arranged between the mounting groove (123) closest to the first body (110) and the mounting groove (123) adjacent to the mounting groove, and two first bending grooves (121) are arranged between the other adjacent mounting grooves (123);

in the second column of mounting grooves (125), three second bending grooves (122) are arranged between the mounting groove (123) closest to the first body (110) and the mounting groove (123) adjacent to the mounting groove, and two second bending grooves (122) are arranged between the other adjacent mounting grooves (123).

10. The reduced diameter snake bone according to any of claims 1-9, wherein: the opening size of the first bending grooves (121) is the same as the opening size of the second bending grooves (122).

11. The reduced diameter snake bone according to any of claims 1-9, wherein: the sizes of the first bending grooves (121) are the same, the sizes of the second bending grooves (122) close to the first body (110) are the same as the sizes of the first bending grooves (121), and the sizes of the second bending grooves (122) far away from the first body (110) are smaller than the sizes of the first bending grooves (121), so that the bending angle of the reducing snake bone in the direction of the first bending grooves (121) is larger than the bending angle of the reducing snake bone in the direction of the second bending grooves (122).

12. An endoscope comprising a head end (210), a bending part (220), an insertion part (230), an operation part (240) and a connection part (250) which are sequentially connected, wherein the bending part (220) comprises the contracted snake bone according to any one of claims 1 to 11, the head end (210) comprises a head end seat (211), and the head end seat (211) is connected with the first body (110).