CN111714067A

CN111714067A - Snake bone assembly and endoscope

Info

Publication number: CN111714067A
Application number: CN202010714527.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hunan Vathin Medical Instrument Co Ltd
Current assignee: Hunan Vathin Medical Instrument Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-09-29

Abstract

The invention is suitable for the technical field of medical instruments, and provides a snake bone component, which comprises: the snake bone units are connected in sequence, and adjacent snake bone units are connected through a rotating structure at the circumferential position; an elastic body that non-detachably connects adjacent ones of the snake bone units at the circumferential position. The snake bone component of the invention is provided with the connection of the elastic body, so that the snake bone unit is not easy to be separated in the axial direction and the radial direction, and meanwhile, the rigidity of the elastic body is low, so that the rigidity of the snake bone component is not excessively increased. Meanwhile, the snake bone units with corresponding quantity can be selected according to the length of the snake bone component, so that the problem that the length of the snake bone component depends on the length of the selected metal cylinder is avoided.

Description

Snake bone assembly and endoscope

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a snake bone component and an endoscope.

Background

The snake bone is an important component of an endoscope, generally used as a bending part of the endoscope, and the bending steering of the endoscope head end is realized by pulling a pulling rope placed in the snake bone.

In the prior art, two forms of snake bone are common:

the rivet connection type rivet riveting connection has the advantages that the manufacturing and assembling process of the rivet riveting connection is very complicated, the technical requirement on workers is high, and the riveting defect is very easy to occur.

Another kind is no riveting formula snake bone, as in patent CN107334449A, realizes the connection between the adjacent part through the vice connection of snap ring hinge structure, and the both sides of connecting the vice are formed with the corner cut respectively, has guaranteed promptly that the snake bone can rotate in a flexible way, has also guaranteed that each unit of snap ring hinge can not scatter to save rivet structure, improved production efficiency greatly. Various designs of snap ring hinge structures have also appeared in the prior art, such as in patents CN208677340U, CN208464025U, and CN208228927U, with different types of snap ring hinge structure designs.

However, in the case of the rivetless snake bone, the stability of the connection between the snake bone units is far inferior to that of the rivet connection, and particularly in the radial direction of the snake bone segments, there may be a problem of falling off, that is, when the snake bone units receive a force in the radial direction, the snake bone units fall off from the adjacent snake bone units, and the falling off is not usually generated in the diagnosis use, but at the non-diagnosis time, under the external force (traction force caused by the non-traction wire), the user does not intend to bend the snake bone segments excessively, and the adjacent snake bone units are easy to fall off.

Meanwhile, for the non-riveting snake bone, the connecting structure between the adjacent snake bone units is generally more complex, so that the processing difficulty is increased.

Disclosure of Invention

The invention aims to provide a snake bone component and an endoscope, and aims to solve the technical problem that a snake bone unit is easy to fall off in the radial direction in the prior art.

The invention provides a snake bone component, which comprises:

the snake bone units are connected in sequence, and adjacent snake bone units are connected through a rotating structure at the circumferential position;

an elastic body that non-detachably connects adjacent ones of the snake bone units at the circumferential position.

Further, the circumferential positions include first and second opposing circumferential positions.

Further, the elastic body is fixed on the snake bone unit by welding or bonding.

Further, the elastic body encloses the rotating structure.

Further, the elastic body covers the outer side surfaces of all the snake bone units.

Further, still have the haulage rope installation department on the snake bone unit, wherein, haulage rope installation department with the rotating-structure is at the interval of snake bone unit's circumference.

Further, the elastomer does not cover the leash mounting portion.

Further, the rotating structure comprises a connecting lug and a connecting groove.

Further, the central angle of the connecting lug and the connecting groove is less than 180 degrees.

The invention also provides an endoscope comprising a snake bone assembly as described above.

Compared with the prior art, the invention has the technical effects that:

1. the snake bone component of the invention is provided with the connection of the elastic body, so the snake bone unit is not easy to be separated in the axial direction and the radial direction, and meanwhile, the rigidity of the elastic body is smaller, so the rigidity of the snake bone component is not excessively increased.

2. In the present invention, the elastic body covers the gap between the snake bone units, and therefore, the gap does not sandwich the external rubber.

3. The invention can set the central angle of the connecting lug and the connecting groove to be less than 180 degrees, therefore, each snake bone unit can be independently manufactured and then assembled into the snake bone component, and the snake bone units with corresponding number are selected according to the length of the snake bone component, thereby avoiding the dependence of the length of the snake bone component on the length of the selected metal cylinder.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a snake bone assembly of the present invention;

FIG. 2 is a schematic view of a snake bone assembly with the elastomer omitted;

FIG. 3 is a schematic view of the elastomer of the present invention covering the entire snake bone element;

FIG. 4 is an axial view of the snake bone assembly of the present invention;

FIG. 5 is a schematic view of the snake bone assembly axially disengaged;

FIG. 6 is a cross-sectional view of a snake bone assembly having an elastomer of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic view of a snake bone component of the invention, which comprises:

a plurality of snake bone units 10 connected in sequence, wherein the snake bone units 10 are connected through a rotating structure at a circumferential position P; the whole snake bone component is formed by sequentially connecting a plurality of snake bone units 10, and adjacent snake bone units 10 can rotate relatively, so that the snake bone component which can be prevented from radially falling can be bent, and the observation visual angle of the endoscope can be conveniently adjusted.

An elastic body 30 for non-detachably connecting adjacent ones of the snake bone units 10 at the circumferential positions P.

Wherein the elastomer 30 is one of the following structures: metal net, elastic polymer material net, elastic plastic pipe.

Because the snake bone component of the invention is provided with the connection of the elastic body 30, the adjacent snake bone units 10 are not easy to be separated in the axial direction and the radial direction, and simultaneously, because the rigidity of the elastic body 30 is smaller, the rigidity of the snake bone component is not increased too much. Meanwhile, there is often a gap between the opposite end faces of the adjacent snake bone units 10, as shown in fig. 2, which is a schematic view of the snake bone assembly without the elastic body, it can be seen that there is a gap between the opposite end faces of the adjacent snake bone units 10, which provides a possibility for the snake bone assembly to bend, if there is no gap, the adjacent snake bone units 10 cannot rotate mutually, and generally, the larger the gap, the largest angle that can be rotated between the adjacent snake bone units 10 is; however, this gap also causes other problems, since the outside of the snake bone assembly is usually covered with a rubber in the prior art, the rubber may be sandwiched between the adjacent snake bone units 10, which may affect the normal use. However, in the present invention, the elastic body 30 covers the gap, and therefore, the gap does not sandwich the external eraser.

Further, the circumferential position P includes a first circumferential position P1 and a second circumferential position P2 that are opposite. That is, the adjacent snake bone units 10 have two rotation structures.

Further, the elastic body 30 is fixed to the snake bone unit 10 by welding or bonding. Therefore, the fixing method in the invention is simple in processing.

Further, the elastic body 30 encloses the rotation structure, so that the snake bone assembly of the present invention can also prevent the rotation structure from pinching the rubber.

In the snake bone assembly shown in fig. 1, the elastic body 30 does not cover the whole outer side surface of all the snake bone units 10, that is, the elastic body 30 is distributed on the snake bone assembly at intervals; however, the elastic body 30 of the present invention may be formed such that the elastic body 30 covers the outer surfaces of all the snake bone units 10 as shown in fig. 3. That is, the entire snake assembly requires only one long elastic body 30, and the fixing is performed with respect to the snake bone unit at the corresponding position of the elastic body 30.

Further, the snake bone unit 10 is also provided with a traction rope mounting part WA, wherein the traction rope mounting part WA is spaced from the rotating structure in the circumferential direction of the snake bone unit 10.

The pulling rope installation portion WA is used for installing the pulling rope W, the pulling rope W is usually fixedly inserted into the pulling rope installation portion WA of the most front snake bone unit 10, and movably inserted into the pulling rope installation portions WA of other snake bone units 10, so that the most front snake bone unit 10 can be driven to rotate by controlling the extension and retraction of the pulling rope W, and the most front snake bone unit 10 sequentially drives the following snake bone units 10 to rotate, thereby realizing the bending of the whole snake bone assembly capable of preventing radial falling.

Further, the elastic body 30 does not cover the traction rope mounting portion WA. Therefore, when the pulling rope is installed, the position of the pulling rope can be observed through the pulling rope installation part WA, so that the installation is convenient.

Further, the rotation structure includes a coupling lug 11 and a coupling groove 21.

As for the central angle θ of the engaging lug and the connecting groove, as shown in fig. 2, the central angle θ is larger than 180 degrees, and since the adjacent snake bone units are not detachable in the axial direction, during the machining, usually, a metal cylinder with a certain length is first selected, and laser cutting is performed on the metal cylinder to directly form the corresponding snake bone unit 10, so that the length of the snake bone assembly depends on the selected length of the metal cylinder.

Another innovative aspect of the present invention is that the central angle θ of the coupling lug and the coupling groove can be set to be less than 180 degrees, as shown in fig. 5, which is a schematic view of the snake bone assembly which is axially separated, and the adjacent snake bone units 10 can be axially separated without the coupling elastic body 30; however, it is possible to separately manufacture the snake bone units 10 and then connect each snake bone unit 10 with the elastic body 30 to prevent the separation in the axial and radial directions, as shown in fig. 6 which is a cross-sectional view of a snake bone assembly having the elastic body 30, wherein the elastic body 30 and the snake bone units have welding points or bonding points S, so that the elastic body 30 connects the adjacent snake bone units 10 by welding or bonding.

Therefore, for the snake bone units with the central angles theta of the connecting lugs and the connecting grooves smaller than 180 degrees, each snake bone unit can be independently manufactured and then assembled into a snake bone component, and the snake bone components are selected according to the length of the snake bone component, so that the length of the snake bone component is prevented from being dependent on the length of the selected metal barrel.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A snake bone assembly, comprising:

the snake bone units (10) are connected in sequence, and the adjacent snake bone units (10) are connected through a rotating structure at a circumferential position (P);

an elastic body (30) that non-detachably connects adjacent ones of the snake bone units (10) at the circumferential positions (P).

2. A snake bone assembly according to claim 1, wherein said circumferential positions (P) comprise first (P1) and second (P2) opposite circumferential positions.

3. A snake bone component according to claim 1, wherein said elastic body (30) is fixed to said snake bone element (10) by welding or gluing.

4. A snake bone assembly as claimed in claim 1, wherein said resilient body (30) surrounds said rotational structure.

5. A snake bone component according to claim 1, wherein said elastic body (30) covers the outer side of all of said snake bone elements (10).

6. A snake bone assembly as claimed in claim 1, wherein said snake bone unit (10) further has a pull cord mounting (WA) thereon, wherein said pull cord mounting (WA) is spaced from said rotary structure in the circumferential direction of said snake bone unit (10).

7. A snake bone assembly according to claim 7, wherein said elastomer (30) does not cover said traction cord mounting portion (WA).

8. A snake bone assembly as claimed in claim 1, wherein said rotational structure comprises attachment lugs (11) and attachment slots (21).

9. A snake bone component according to claim 7, wherein the central angle (θ) of said attachment lugs and said attachment slots is less than 180.

10. An endoscope, comprising a snake bone assembly according to any of claims 1-9.