JPS61263443A - Forcept apparatus for 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 endoscopic forceps device.

[Conventional technology]

The endoscope forceps device is equipped with an operating section such as a slider at the rear of a small-diameter flexible tube that can be freely inserted through the insertion channel of the endoscope, and a forceps cup at the tip of the flexible tube. A pair of forceps bodies, such as a There is something that can be manipulated. Among these? J!
The forceps device for I, as shown in Figure 4, has an internal forceps device. The forceps body 3 is inserted into the insertion channel through the forceps port 2a provided in the operation section 2 of the JA mirror 1, and is made to protrude from the forceps outlet 5 of the endoscope tip 4, and from this state, the forceps body 3 is opened and closed.・I am trying to use it. In addition, in Fig. 4,
Reference numeral 6 indicates a flexible tube, and reference numeral 7 indicates an operating section.

By the way, among these? The opening side structure of the forceps body 3 of the forceps device for JiI has conventionally been provided with an opening cover 8. shown in FIGS. 5 and 6. A structure using links 13 is used.

That is, to explain the structure here, 3 is a pair of forceps bodies such as the above-mentioned forceps cups, and a connecting piece 11 is integrally provided at the rear of each forceps body 3.

On the other hand, the opening cover 8 is formed into a substantially U-shape as a whole with a slotted portion 8a formed on the distal end side, and its proximal end is connected to the distal end of the flexible tube 6. The opening/closing fulcrum of the forceps body 3 is rotatably supported on the opening side of the spaced part (slotted part 8a) of the opening cover 8 using a pivot pin 18 that passes through the opening cover 8. Each connecting piece 11 of the body 3.
11 and links 13 are rotatably connected to each other using pivot pins 12. Then, the remaining ends of each link 13. An operating wire 14 inserted through the flexible tube 6 is rotatably connected to a wire joint fitting 15 at the tip thereof using a pivot pin 16 to form an open/close structure.

Such an endoscopic forceps device converts the movement of the operating wire 14 into the movement necessary to open and close the forceps body 3 using the connecting pieces 11° 11 and the links 13, 13.
It can be opened and closed using the pivotable bin 18 as a fulcrum.

[Problem that the invention seeks to solve]

By the way, in the conventional forceps mounting technique, as shown in FIG. 6, the connection piece 11. Each side of the link 13 and the inner surface of the opening cover 8 are made to be flush with each other, and in this state, the link 13 and the connecting piece 11.11 are expanded and contracted, but in this structure, the connecting piece 11.11 and the link 13° The contact area between 13 and the inner surface of the opening cover 8 is large, which causes a large contact resistance (the connecting piece 11 and the link 13 come into contact), which makes the operation difficult. In addition, the pivot bin 12.1
Although not shown, as a fixing method in step 6, a rivet is used as a pivot pin, and the tip of the inserted rivet is deformed to be flush (
In addition to caulking by dipping (soaking), it is also being considered to weld the tips of the pivot pins 12 and 16 by laser welding, etc., as shown in section a in Figure 6. However, if unevenness occurs during deformation, spatter or swelling occurs during WJ contact, the previous link 13. In addition to the connecting pieces 11, the crushed surfaces are polished because they strongly contact the inner surface of the opening cover 8, making operation extremely difficult. After welding, correction work such as sanding was considered essential, which not only made the process more difficult to perform, but also required a lot of man-hours. The present invention has been made in view of these problems, and aims to improve operability and at the same time eliminate the need for the work that was conventionally required to ensure smooth operation.

[Means and actions for solving the problem] In this device, the forceps body is pivotally supported on the inner surface of the aperture cover without any gap, and the connecting piece of the forceps body.

A gap is provided between the links connected thereto and the inner surface of the opening force bar facing them, thereby reducing the contact surface of the connecting pieces and links with the inner surface of the cover, thereby creating a light (good) forceps body without rattling. Operate opening and closing.

〔Example〕

FIG. 1 shows a first embodiment of the invention. Note that each component in FIG. 1 is the same as in FIG. 4 of the prior art, so
Components that are the same as those in FIG. 4 are given the same reference numerals, and their explanations will be omitted.

Here, to explain the points that are different from FIG. A stepped portion 20 is formed across the plate surface of each link 13.13 located in the connecting piece 11.11 and the link 13.13 connected thereto, and the inner surface of the opening force bar 8 facing them. In addition to providing the respective gaps 21, the forceps body 3 is pivotally supported on the inner surface of the opening cover 8, as in the conventional case. The gap 21.degree. 21 is larger than the height of protrusions such as spatter and weld build-up that are likely to occur when fixing the pivot bins 12 and 16.

With this structure, the forceps body 3 is supported without wobbling by the shaft support with no gaps, and the connecting pieces 11.11, links 13.13 and opening cover 8.
This reduces the contact area with the inner surface. This means that the forceps body 3 can be operated easily while maintaining good opening and closing functions due to the reduction in contact resistance. Therefore, operability can be improved. In addition, the ends of the pivot pins 12 and 16 are welded by laser welding or the like to the connecting piece 11. Since protrusions such as spatter and bulges that appear on the weld to the link 13 are allowed in the gap 21, there is no need to remove or repair the weld, such as sanding the weld, which was previously required, making assembly easier. This has the advantage of reducing the number of man-hours involved.

FIG. 2 shows a second embodiment of the present invention, in which a spacer 22 is provided on the pivot pin 18 of the forceps body 3 and between the forceps body 3 and the inner surface of the opening cover 8, and the forceps body 3 is Opening cover 8
At the same time, the connecting piece 11. Link 13
A gap 21 is provided between the opening cover 8 and the inner surface of the opening cover 8.

FIG. 3 shows a third embodiment of the present invention, in which a stepped portion 23 is provided on the inner surface of the opening cover 8, extending from the connecting piece 11 to a portion corresponding to the link 13 connected thereto, to form a gap 21. This is how it is configured.

However, the structures of the first to third embodiments described above may be combined as appropriate, and in the case of a structure in which bottles are welded, the same effect can be obtained even if a gap is provided only on the welded side. .

In addition, although the case of welding was described in each of the above-mentioned embodiments, the same can be said of the method of deforming the rivet and caulking.

〔Effect of the invention〕

As explained above, according to the present invention, the gap reduces the contact resistance in the connecting pieces and the links that lead to them, thereby making the operation easier.

Therefore, it is possible to improve the operability.

Moreover, at the same time, the gap becomes an allowable space for the protrusions on the connecting piece and the link, so that the work conventionally required for smooth operation can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of the main parts of an endoscopic forceps device according to a first embodiment of the present invention, and FIG. 2 is a main part of an endoscopic forceps device according to a second embodiment of the present invention. FIG. 3 is a side sectional view of the section showing the third embodiment of the present invention. A side sectional view of the main parts of the il mirror forceps device, Figure 4 shows the inside of the forceps device attached. 5 is a plan sectional view showing the structure around the forceps body of a conventional endoscope forceps device, and FIG. 6 is a side sectional view thereof. 3... Forceps body, 8... Opening cover, 11... Connecting piece, 12.16.18... Pivoting bottle, 13... Link, ~ 21... Gap. Applicant's agent Patent attorney Jun Tsuboi 1 Figure 2 Figure 2 j13v! ! 1 Figure 5 Figure 6

Claims (1)

[Claims] On the opening side of the spaced part of the opening cover formed with the slotted part,
A pair of forceps bodies each having a connecting piece connected to the rear part are provided so as to be freely openable and closable, and a link is rotatably connected to the connecting piece.
In the endoscopic forceps device in which the forceps body is opened and closed in conjunction with the movement of a link, the forceps body is pivotally supported on the inner surface of the opening cover without a gap, and a connecting piece of the forceps body; A forceps device for an endoscope, characterized in that a gap is provided between a link connected to the link and an inner surface of an opening cover facing the link.