CN219500954U

CN219500954U - Bending part of endoscope

Info

Publication number: CN219500954U
Application number: CN202222240334.9U
Authority: CN
Inventors: 孔维彪; 李承玖; 张民言; 陆文浩
Original assignee: Shanghai Eda Photoelectronic Technology Co ltd
Current assignee: Zhongke Optoelectronics (Beijing) Intelligent Technology Co.,Ltd.
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-08-11
Anticipated expiration: 2032-08-24

Abstract

The utility model provides an integrated endoscope bending part, a snake bone body and a traction wire, wherein: the traction rope is arranged on the inner wall of the snake bone body and drives the snake bone body to bend the snake bone body; the snake bone body is provided with a bending notch allowing the snake bone body to bend. The utility model has simple processing technology and high reliability, and realizes the maximization of the utilization of the inner cavity space. The integral snake bone is sleeved with the netting, or the forward pulling limit of the traction wire at the outer side is bent, so that the damage caused by the overbending of the integral snake bone is avoided. Through setting up limit structure, through realizing the protection of bending excessively to wire rope. The bending initial position and the bending radius are adjusted by changing the diameters of the radial through holes which are axially arranged and the distances between the adjacent through holes.

Description

Bending part of endoscope

Technical Field

The utility model relates to the field of endoscopes, in particular to an integral endoscope bending part.

Background

The bending part of the existing integrated endoscope is mainly of a structure of being clamped end to end through the snake bone unit, and the structure can lead to small using space of the inner cavity of the snake bone body and influence space utilization. And the structural stability of the existing endoscope is poor.

Patent document CN209595706U discloses a bending portion of an endoscope and an endoscope. The bending part of the endoscope comprises a plurality of bending blocks connected end to end, two adjacent bending blocks are connected through a connecting part, the connecting part comprises a groove and a bulge, the bulge is rotatably accommodated in the groove, and the end surfaces of the bending blocks are respectively provided with a butt joint surface at two sides of the connecting part. The protrusion rotates to the maximum angle in the groove relatively, and the abutting surfaces of the two adjacent bending blocks are abutted, so that the two bending blocks are positioned at the maximum bending angle and enter a locking state. The both sides of recess are equipped with locking portion, and bellied both sides are equipped with locking portion complex spout, and locking portion is along spout slidable, and the open end of spout is equipped with spacing portion, and locking portion can block mutually with spacing portion to make locking portion spacing in the spout. The angle corresponding to the arc sliding track of the locking part along the chute is larger than or equal to the maximum angle of the relative rotation of the protrusion and the groove. The bending part of the endoscope can keep stable connection between the two bending blocks. But the above scheme adopts the connection mode of snake bone unit, belongs to joint connection, and is relatively unstable in structure.

Disclosure of Invention

In view of the shortcomings in the prior art, it is an object of the present utility model to provide an integrated endoscope bend.

The utility model provides an integrated endoscope bending part, which comprises a snake bone body and a traction wire, wherein:

the traction rope is arranged on the inner wall of the snake bone body and drives the snake bone body to bend the snake bone body;

the snake bone body is provided with a bending notch allowing the snake bone body to bend.

Preferably, a plurality of bending notches are arranged, and the bending notches are arranged side by side and/or in a staggered manner along the axial direction of the snake bone body.

Preferably, a traction wire limiting hole for limiting the traction wire is formed in the snake bone body.

Preferably, the bending notch comprises a strip notch arranged along the circumferential direction of the snake bone body and through holes communicated with two ends of the strip notch.

Preferably, the strip-shaped notch is formed by encircling an upper notch surface and a lower notch surface, and the upper notch surface and the lower notch surface are contacted when the snake bone body is bent to the maximum extent.

Preferably, the upper and lower groove surfaces are fully engaged when the upper and lower groove surfaces are in contact.

Preferably, the diameter of the through holes and/or the spacing between adjacent through holes is adjustable.

Preferably, a plurality of bending notches are provided, and the bending notches are equally spaced along the circumference of the snake bone body.

Preferably, the net is sleeved outside the snake bone body and connected with the snake bone body;

the net is a circular tubular net, and the net is formed by a bundle consisting of a plurality of steel wires or tungsten wires in each strand in a spiral manner with the diameter of an inner hole of the net set and the pitch set; the netting is provided with a plurality of strands on a circular section.

Preferably, the device further comprises a stop block and a steel pipe arranged on the traction line, wherein:

the steel pipe is fastened on the traction wire, and the traction wire passes through the through hole of the stop block and can reciprocate in the through hole; the outer diameter of the steel pipe is larger than the diameter of the through hole.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model has simple processing, lower cost and convenient operation.

2. According to the utility model, the braiding net is sleeved outside the integrated snake bone, or the forward pulling limit of the traction wire at the outer side of the bending is adopted, so that the damage caused by the over-bending of the integrated snake bone is avoided.

3. The utility model has high reliability, the netting improves the tensile strength of the bending part, and the bending part is prevented from being excessively bent to cause the failure of the bending part.

4. According to the utility model, the radial through holes and the gaps are arranged, so that the deformation of the integral snake bone generated by bending is reduced, and the plastic deformation is avoided, thereby prolonging the bending life.

5. The utility model adjusts the bending initial position and the bending radius through the change of the diameter of the radial through holes which are axially arranged and the distance between the adjacent through holes.

6. According to the utility model, through arranging the limiting structure, the over-bending protection of the steel wire rope is realized.

7. The utility model realizes the extremely simplified design of the elements forming the bending part of the integrated endoscope and the full utilization of the elements, maximizes the utilization of the inner cavity space, has no waste except the minimum necessary wall thickness, and can perfectly solve the contradiction of the outer diameter minimization and the inner cavity maximization of the endoscope for many years through more wires, optical fibers and working channels.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

fig. 1 is a schematic view of a bending portion of an integrated endoscope.

Fig. 2 is a schematic side view of a first embodiment of a snake bone body of a bending section of an integrated endoscope.

Fig. 3 is a schematic perspective view of a first embodiment of a snake bone body of a bending section of an integrated endoscope.

Fig. 4 and 5 are schematic structural views of a second embodiment of a bending portion of an integrated endoscope.

Fig. 6 and 7 are schematic structural views of a third embodiment of a bending portion of an integrated endoscope.

FIG. 8 is a graphical illustration of integral endoscope bend parameters.

Fig. 9 is a schematic view of a netting structure of a bending portion of an integrated endoscope.

The figure shows:

snake bone body 1

Traction wire 2

Netting 3

Curved slot 4

Strip-shaped notch 401

Through hole 402

Stop 5

Steel pipe 6

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

As shown in fig. 1 to 9, the integrated endoscope bending part provided according to the present utility model includes a snake bone body, a traction wire, and a netting, wherein: the net braiding sleeve is arranged on the outer side of the snake bone body; the traction rope is arranged on the inner wall of the snake bone body and drives the snake bone body to bend the snake bone body; the snake bone body is provided with a bending notch allowing the snake bone body to bend. The snake bone body is hollow. The inside of snake bone body is provided with carries out spacing traction wire spacing hole of spacing to the traction wire. The bending notch comprises a strip notch and a through hole, wherein the strip notch is arranged along the circumference of the snake bone body, and the through hole is communicated with two sides of the strip notch. The strip-shaped notch is formed by encircling an upper groove surface and a lower groove surface, and when the snake bone body is bent to the maximum extent, the upper groove surface is contacted with the lower groove surface. When the upper groove surface and the lower groove surface are contacted, the upper groove surface and the lower groove surface are completely attached. The bending notch is provided with a plurality of, and a plurality of bending notches set up side by side along the axial of snake bone body. The bending notch is provided with a plurality of, and a plurality of bending notches are followed the equidistant setting of circumference of snake bone body. The net is a circular tubular net, and the net is formed by a bundle consisting of a plurality of steel wires or tungsten wires in each strand in a spiral manner with the diameter of an inner hole of the net set and the pitch set; the netting is provided with a plurality of strands on a circular section. Still including setting up dog and the steel pipe on the traction line, wherein: the steel pipe is fastened on the traction wire, and the traction wire passes through the through hole of the stop block and can reciprocate in the through hole; the outer diameter of the steel pipe is larger than the diameter of the through hole.

Further, the snake bone body can be formed by laser cutting and processing of a stainless steel thin-wall tube, so that the integrated snake bone body is formed, and the preparation cost is low. The snake bone body has certain tensile strength and avoids deformation caused by axial tension. The snake bone bending resistance has the capability of resisting overbending, avoids plastic deformation caused by excessive bending after being subjected to radial external force, ensures the reliability and durability of the snake bone, and has small bending angle and pulling force of the snake bone body and good straightness.

More specifically, the stop block and the steel pipe can effectively avoid overbending, and when one traction wire is pulled backwards, the other corresponding traction wire can be pushed forwards due to the bending of the snake bone body. Therefore, by setting the reasonable distance between the stop block and the steel pipe, when the steel pipe moves for a certain distance under the traction of the traction wire, the steel pipe is blocked by the stop block, and the function of avoiding overbending is realized.

The bending notch can be arranged side by side or in a staggered manner. Different bending notch arrangement modes can realize bending at different angles. For example, figures 2 and 3 show a side-by-side arrangement. This arrangement enables bending in two directions. Fig. 4-7 show a staggered arrangement that enables four-directional bending. In addition, the size of the through holes of the bending notch and the distance between the adjacent through holes can also influence the curvature radius of the snake bone body in the maximum bending state. Fig. 5 and 7 show curved slots of different distances through the aperture. The bending pipe can be bent with the same curvature radius in the maximum bending state without changing the seam width and the pitch. As shown in fig. 8. In the figure, a represents the tip cutting distance, θ represents the bending angle, D represents the through-hole diameter, p represents the distance between adjacent bending notches, and D represents the bending portion outer diameter. The snake bone body with different sizes is provided with different axial distances and radial distances of adjacent through holes, and the through holes with different diameters which are axially distributed can change the bending rigidity, the bending radius and the like of different bending sections.

In addition, the pipe material of the snake bone body of the utility model can also be non-super-elastic alloy pipe material. The inner wall of the snake bone body is provided with a rope penetrating hole.

The utility model also adds a net outside the snake bone body, improves the tensile strength, avoids overbending, and can avoid rope holes so as to maximize the built-in space. The traction wire limiting holes can be arranged in the snake bone body according to the requirement.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. The utility model provides an integral type endoscope bending portion which characterized in that includes snake bone body and pull wire, wherein:

2. The integrated endoscope bending portion according to claim 1, wherein a plurality of bending notches are provided, and a plurality of bending notches are arranged side by side and/or in a staggered manner along an axial direction of the snake bone body.

3. The integrated endoscope bending portion according to claim 1, wherein a pull wire limiting hole limiting the pull wire is provided inside the snake bone body.

4. The bending portion of the one-piece endoscope according to claim 1, wherein the bending notch includes a bar-shaped notch provided along a circumferential direction of the snake bone body and a through hole communicating both ends of the bar-shaped notch.

5. The bending portion of the one-piece endoscope of claim 4, wherein the strip-shaped notch is defined by an upper groove surface and a lower groove surface, the upper groove surface and the lower groove surface being in contact when the snake bone body is bent to a maximum extent.

6. The integrated endoscopic flexure of claim 5, wherein the upper channel surface and the lower channel surface are fully conformed when the upper channel surface and the lower channel surface are in contact.

7. The integrated endoscopic curve of claim 5 wherein the diameter of the through holes and/or the spacing between adjacent through holes is adjustable.

8. The integrated endoscope bending portion according to claim 1, wherein a plurality of bending notches are provided, the plurality of bending notches being provided at equal intervals along a circumferential direction of the snake bone body.

9. The integrated endoscope bending portion according to claim 1, further comprising a netting, wherein the netting is sleeved outside the snake bone body and connected with the snake bone body;

10. The integrated endoscopic curve of claim 1 further comprising a stop and steel tube disposed on the pull line, wherein: