JPS63143023A - Curving operation apparatus of endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an endoscope bending operation device that bends a bending portion on the distal end side of an insertion section by moving an operation wire.

[Prior Art] Generally, medical endoscopes for observing and treating the inside of body cavities such as the stomach and intestines, and industrial endoscopes for observing the inside of lumens of boilers, chemical plants, etc. The ability to point in the desired direction is required.

Therefore, in these endoscopes, conventionally, an operating wire is placed from inside the operating section to the guide sheath built into the flexible tube (which constitutes the insertion section), and one end of the operating wire is connected to the distal end of the curved section (the distal end). In addition to being fixed to a component (component), a bending operating device of a set of wires is provided, the other end of which is connected to the bending operating section of the operating section. In other words, the bending operation can be performed by pulling the operation wire.

By the way, such a wire set pulls a tensioned operating wire and performs repeated bending operations, which causes the operating wire to stretch and the guide sheath and bending part to contract, causing the operating wire and its guide to become damaged. It has the disadvantage that there is relative slack between it and the system (curved part, guide sheath).

This slack causes a phenomenon in which the curved portion does not follow the curve operation, so-called "play" and "angle down" (the curve angle is not the same as the initial state).

Therefore, there is a device as disclosed in Japanese Utility Model Publication No. 59-31202 to solve these problems.

This document discloses a technique in which a connecting device is provided in the middle of an operating wire to change the distance between connecting portions by applying a screwing action.

[Problems to be Solved by the Invention] However, although these techniques can certainly eliminate slack, they are troublesome and time-consuming because they require twisting motion to adjust the stroke.
It was bad in terms of workability.

The present invention has been made in view of these problems, and an object of the present invention is to provide an endoscope bending operation device that can easily remove slack.

[Means and effects for solving the problem] In this bending operation device, there is a winding in the middle of the operation wires 8, 9 that is fixed to the operation wire 8.9 and around which the operation wire 8.9 can be wound. In addition to providing a take-up portion 11, wire fixing members 12, 13, and 16 for fixing the operating wires 8 and 9 wound around this take-up portion 11 are provided,
When slack occurs, the winding section 11 is rotated to wind up a portion of the operating wire that becomes redundant, and this state is fixed with wire fixing members 12, 13, and 16.

[Example] The present invention will be described below based on a first example shown in FIGS. 1 to 3. Fig. 3 shows the entire endoscope (fiber scope, electronic scope, etc.) together with the bending operation device. 1 is the operation part with a built-in pulley 2, and 2a is the operation lever connected to the pulley 2 (pulley 2 and 3 is a flexible tube 5 in which guide sheaths 4, 4 are built, and a curved section 6 (a plurality of curved tubes 6a arranged in series).
... are rotatably connected with a rivet 6b)
This is an insertion section formed by sequentially connecting the distal end forming section 7 and the distal end forming section 7.

This insertion section 3 is connected to the operating section 1. Note that the guide sheaths 4, 4 are fixed to the operating section 1.

In addition, a distal end configuration portion 71; fixed distal operating wires 8 are slidably inserted into the guide sheaths 4, 4, while each distal operating wire 8 remaining in the pulley 2,
A proximal operation wire 9 connected to the end of the handle 8 is wound around the handle 8 so that the curved portion 6 can be bent by rotating the operation lever 2a.

A connecting device 10, which is a main part of the present invention, is provided at the connecting portion between the distal side operating wires 8, 8 and the proximal side operating wire 9.
．． 10 are provided. Its structure is shown in detail in FIG.

That is, to describe the coupling device 10, 11 is a disk-shaped winding plate (corresponding to a winding section) having a shaft portion 11a at the center, and 12 is a disk-shaped fixing plate. and,
The shaft portion 11a is rotatably supported in a support hole 12a provided at the center of the fixed plate 12, and as shown in FIG.
1 is rotatably fixed to a fixed plate 12. Then, the end of the distal end operating wire 8 and the end of the proximal operating wire 9 are respectively fixed to two opposing points on the outer peripheral surface of the winding plate 11, and by rotating the winding plate 11, A portion of each wire can be wound around the circumferential surface.

Further, a bottle-shaped first locking member 1 is provided on the plate surface of the winding plate 11.
3 (wire fixing part, material) and one small hole 14 that can be freely inserted and removed. Furthermore, a plurality of similar small holes 15 are provided on the plate surface of the fixing plate 12 along a concentric circle with the small hole 14, and when the first engaging member 13 is inserted, the small hole 14 is connected to the small hole 15. By connecting the holes 15, the winding plate 11 can be fixed to the fixing plate 12.

By selecting the position of the small hole 15, the position of the operating wire 8.9 coming out from the winding plate 11 is regulated, and the winding plate 11
The amount of wrapping is adjusted.

Furthermore, two pin-shaped second locking members 16 (for wire fixing members) project symmetrically with respect to the winding plate 1. By locking the wire with the second locking member 16.16, the winding plate itself is prevented from rotating due to the tension between the tip side operating wire 8 and the fixed side operating wire 9, and stable winding is obtained. I have to.

In such a bending operation device, when the operation lever 2a is rotated, the tip side operation wire 8,
8 is being towed, and the curved part 6 is moved to the left and right or front and rear.
It will curve in the direction.

As such bending operations are repeated, when relative slack occurs between each operating wire 8, 9 and its guide system (curved portion 6, guide sheath 4, 4), the first The locking member 13 is removed from the small hole 14.15 to release the fixation of the winding plate 11. After this, winding plate 1
1 to an appropriate position, and then attach the first engaging member 13.
When the wire is inserted again from the small hole 14 into the small hole 15 immediately below it and the winding plate 11 is fixed, the excess wire length is wound around the winding plate 11 and fixed as shown in FIG. It will be done. However, the slack is being removed.

In this way, slack that causes "play" and "down angle" can be easily removed.

Note that this invention is not limited to the first embodiment described above, but also includes the fourth embodiment.
A second embodiment shown in FIG. 5, a third embodiment shown in FIG. 5, a fourth embodiment shown in FIG. 6, a fifth embodiment shown in FIGS. 7 and 8, The sixth embodiment shown in FIGS. 9 and 10 may be used.

That is, in the second embodiment, instead of the pin-shaped second locking member 16 shown in the first embodiment, a pair of semicircular arc-shaped second locking members 20 and 20 are provided. 2 locking member 2
0. In the groove formed between jO, the tip side operation wire 8
1. The edge cutting wire 9 on the proximal side is hooked thereon. Such a structure has a large guiding effect of the second locking member 20, 20 for each operating wire 8, 9, so that
It has advantages that are hard to miss.

In the third embodiment, the winding plate 11 shown in the first embodiment is
In addition to the small hole 14, there are a plurality of similar small holes 14a, and the small hole 14
The winding plate 11 can be fixed even if the small holes 14a are provided asymmetrically with respect to each other. Such a structure has the advantage that the amount of winding can be finely adjusted using the asymmetrical small holes 14a.

The fourth embodiment uses an oval-shaped fixing plate 22, and the width dimension is smaller than that of the circular fixing plate 12 shown in the first embodiment, so that the entire coupling device 10 is made smaller. can bring benefits.

The fifth embodiment has a disk-shaped winding plate 24 in which a plurality of small holes 23 are concentrically formed, and a locking member 25 (a wire The structure uses a fixing member (fixing member) to remove slack.

Specifically, in addition to fixing the ends of the distal end operation wires 81 and proximal edge cutting wires 9 to the outer periphery of the winding plate 24, as in the first embodiment, the opposite inner surfaces of the locking members 25 are fixed. A structure is used in which a small hole 23 of the winding plate 24 and a removable pin-shaped hook 26 are integrally provided, and the hook 26 is inserted into the small hole 23 and the locking member 25 is attached to the winding plate 24. By being locked to, the wound operating wires 8 and 9 are fixed.

That is, when loosening occurs, both locking members 25, 25 are first removed from the winding plate 24, as shown in FIG. After that, the winding plate 24 is rotated, each operating wire 8.9 is wound up, and the slack 26 is removed from the small hole 2 at that position.
3 (adjust the amount of wrapping).

This has the advantage of having a simple structure due to fewer components and being smaller than the first embodiment.

In the sixth embodiment, slack is removed by a winding plate 32 formed by joining a circular plate 30 and a regular polygonal plate 31.

Specifically, the winding plate 32 is fixed to the fixed plate 33 at the attachment/detachment mark. Then, the ends of the distal end operation wire 81 and the proximal edge trimming wire 9 are respectively fixed onto the outer periphery of the disc 30.

Further, in addition to providing parallel locking members 35.35 (wire fixing members) on the side surfaces of the fixing plate 33 for regulating the parallel portions of the regular polygonal base plate 31, an operating wire is provided between the locking members 35, 35. A structure in which narrow grooves 36 and 36 are formed to regulate the positions where 8 and 9 come out is used, and the regular polygonal plate 32
In order to restrict the movement of the wires, the coiled operating wires 8 and 9 are fixed.

That is, when slack occurs, the winding plate 32 is first removed from the fixed plate 33. Thereafter, by rotating the winding plate 32, each operating wire 8, 9 is wound around the disk 30 to remove slack. Next, while fitting the parallel sides of the regular polygonal plate 31 in this state into the engaging member member 35, the winding plate 32 is again inserted.
is fixed to the fixed plate 33 (adjustment of the amount of winding).

In each of the embodiments described above, although not shown, a guide groove may be provided on the circumferential surface of the winding plate to prevent the wound operating wire from coming off.

[Effects of the Invention] As described above, according to the present invention, the winding section is rotated to wind up the operating wire, and the wire is fixed by the wire fixing member, thereby eliminating slack.

Therefore, slack can be easily removed, and "play" and "down angle" caused by slack can be eliminated.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of this invention,
Fig. 1 is an exploded perspective view showing a structure for removing slack, which is the main part of this invention, Fig. 2 is a perspective view showing its assembled state, and Fig. 3 is an endoscope bending operation using the structure. A schematic side view showing the device; FIG. 4 is a perspective view showing the main parts of a second embodiment of the invention; FIG. 5 is a perspective view showing the main parts of the third embodiment of the invention; FIG. 7 is an exploded perspective view showing the main parts of the fifth embodiment of the invention, and FIG. 8 is a perspective view showing the assembled state. , FIG. 9 is a front view showing essential parts of a sixth embodiment of the present invention, and FIG. 10 is a plan sectional view thereof. 1...Operation unit, 2, 2a...Pulley, operation lever (
Curved operation part), 6... Curved part, 8, 9... Tip side operation wire, proximal side operation wire (operation wire), 1
1... Winding plate (winding part), 12, 13° 16...
A fixing plate, a first locking member, and a second locking member (wire fixing member). Applicant's agent Patent attorney Jun Tsuboi Figure 4 Figure 5 1^ Figure 6 Figure 7 Factor 8

Claims (1)

[Claims] A crossing operation wire is arranged between the curved part and the curved operation part,
In the bending operation device for an endoscope that gives a bending motion to the bending portion from the movement of the operation wire, a winding portion is provided in the middle of the operation wire and is fixed to the operation wire and is capable of wrapping the operation wire around the operation wire. A bending operation device for an endoscope, further comprising a wire fixing member for fixing an operation wire wound around the winding portion.