JPS62127044A - 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 endoscope forceps device, and in particular, to a pair of forceps cups that can be opened and closed! The present invention relates to an improvement of an endoscopic forceps device in which a swinging link swings smoothly and favorably.

[Prior Art] Conventionally, an apparatus shown in FIG. 2, for example, has been used as an endoscopic forceps apparatus for observing and treating the inside of a living body cavity or an affected part thereof. That is, in the figure, reference numeral 1 indicates the overall configuration of this type of endoscope, and an operating section 2 is provided at one end of the endoscope l, and a forceps opening section 3 is provided at the other end. The operating section 2 and the forceps opening section 3 are connected to each other by a channel (not shown) inserted into the jacket 4.

The operating section 2 has an operating rod 7 connected to a flexible conductor 6 through a connecting port 5, and a pair of operating rods 7 through which the driving section 8 is inserted from the forceps opening section 3 by moving the operating rod 7 forward and backward. The forceps cup 9.9 is adapted to open and close.

As shown in FIG. 3, the drive section 8 connected to the pair of forceps cups 9.
The links 11.11 are respectively connected via hinge pins 12.12 to connecting pieces 13.13 extending integrally from a pair of forceps cups 9.9, and their The other end is connected to an operating wire 15 via a joint 14,
The operating wire 15 is configured to be covered by a flexible conductor 16. Therefore, when the operating wire 15 moves forward or backward, the link 11.11 moves to the hinge pin 12.12.
The pair of forceps cups 9, 9 are opened and closed using the connecting bottle 17 as a fulcrum.

[Problems to be Solved by the Invention] By the way, to explain in a little more detail the method of assembling the forceps cup 9 and the link 11, the connecting piece 13 integrally extended from the forceps cup 9 is shown in FIG. As shown, after the hinge pin 12 is inserted into the insertion hole 12a, it is connected to the link 11, and at that time, the connecting portion is laser welded. The connecting piece 13 and link 11 of the forceps cup 9 assembled in this way are assembled into the slot 11 and then connected by the connecting pin 17, as shown in FIG. It is supposed to be done.

However, the welding result between the connecting piece 13 and the link 11 was poor, as shown in FIG.
The connecting piece 13 and the link 14 do not easily extend and swing after being assembled into the slotted opening cover 10, causing problems such as the forceps cup 9 not opening or closing when necessary.

For this reason, we will perform a sanding operation to remove the raised pieces 19 and 19 that occur on the welded part 18.
This takes a lot of time and not only increases the number of man-hours, but also results in precision parts having to be ground with the necessary tools, which impairs the movement of the parts. In addition, the shavings scattered during the grinding operation get into the fittings and gaps of precision parts and are difficult to remove even with cleaning, which is an unfavorable factor from the standpoint of health and safety.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an endoscopic forceps device that can eliminate the above-mentioned defects in the welded portion between the connecting piece and the link.

[Means for Solving the Problems] In order to achieve the above-mentioned technical problem, the present invention provides an endoscopic forceps device in which a pair of forceps cups can be opened and closed by advancing and retracting an operation rod. Insert the hinge pin into the insertion hole of the connecting piece and link that are incorporated in the lock cover and learn the opening and closing movements of the pair of forceps cups, and
The four parts larger than the insertion hole are formed in at least one of the connecting pieces or the links, and the hinge pin is welded within this recess.

[Function] In the present invention, the welded portion of the hinge pin of the connecting piece and the link is formed within the recess, and the operation of the connecting piece and the link is not inhibited by the protrusion that occurs when the welded portion is welded.

[Embodiments] Examples of the present invention will be described below with reference to the drawings. Components that are the same as those shown in FIGS. 2 to 6 will be described with the same reference numerals.

FIG. 1(A) to FIG. 1(H) are the first to eighth embodiments of the present invention.
1 is a sectional view showing a part of an endoscopic forceps device according to an embodiment, and in each figure, reference numeral 13 indicates a connecting piece, and this connecting piece 1
3, a hinge pin 12 is inserted through the insertion hole 12a, and the link 11 is connected to the hinge pin 12. Further, in the insertion section 12a of the connecting piece 13, a concave groove 20 having a larger size than the insertion section 12a is provided.
has been deleted. The recessed groove 20 may be a chamfered portion X or a counterbore portion Y, and in either case, it may be used as appropriate. Note that the concave groove 20 is not limited to the insertion hole 12a of the connecting piece 13, but is also provided in the insertion hole 1 of the link 11.
2a may be sufficient.

When the concave groove 20 is created in the connecting piece 13, the hinge pin 12 is fitted into the insertion hole 12a, and the welded portion 18 of the hinge pin 12 is formed in the concave groove 20 by laser or the like. That is, Fig. 1 (A) (B)
In Embodiment 1.2 shown in the figure, the length m of the hinge pin 12 is at the bottom position of the recessed groove 20, and the welded portion 18 is formed in this state. In addition, in the third and fourth embodiments shown in FIGS. 1(C) and 1(D), the length m of the hinge pin 12 is
In the fifth and sixth embodiments shown in FIGS. 1(E) and 1(F), the length m of the hinge pin 12 matches the outer surface of the connecting piece 13. Furthermore, in the seventh and eighth embodiments shown in FIGS. 1CG and 1H, the length m of the hinge pin 12 forms the welded part 18 below the bottom position of the concave groove 20. In either case, the welded portion 18 is completely accommodated in the recessed groove 20. Therefore, even if the combination of the connecting piece 13 and the link 11 connected by the hinge pin 12 is assembled into the slotted opening cover 10 as shown in FIG. 6, its expansion and contraction swing will not be restricted by the welded portion 18.

In each of the above embodiments, the case where the concave groove 20, which is a concave part, is provided on the connecting piece 13 side is shown, but it is also possible to provide it on the link ll side, and the concave groove 20 is The cross-sectional shape is not limited to the inverted conical shape or cylindrical shape of each embodiment.

[Effects of the Invention] As explained above, the present invention has a structure in which a hinge pin that connects a connecting piece and a link of a pair of forceps cups is inserted into an insertion hole, and the welded portion formed at this time is prevented from protruding. Because the concave groove was removed.

According to the present invention, the opening and closing movement of the pair of forceps cups becomes smoother and better, and since the grinding work is no longer appreciated, there is no shavings caused by the grinding work, which is excellent for contributing to quality improvement for this type of medical device. It has a great effect.

[Brief explanation of drawings]

FIGS. 1(A) to (H) are enlarged views of main parts showing the first to eighth embodiments of the present invention, FIG. 2 is a perspective view showing the state in which the forceps device is inserted into the endoscope, and FIG. 4 is a partial sectional view of a conventional forceps device, FIG. 4 is a partial side view of the conventional forceps device, FIG. 5 is a diagram showing the welded state of the hinge pin in FIG. 4, and FIG. 6 is a partial assembly of the conventional forceps device. FIG. 1... Endoscope 7... Operating rod 9... Forceps cup 10... Slit opening cover 11... Link 12... Hinge pin 12a... Insertion hole 13... Connection piece 18 ...Welded part 20 ... Recessed groove patent applicant Olympus Optical Industry Co., Ltd. No. 1
Figure '8) Figure 1 (I3) Figure 1 (E) 1'2 Figure 1, f') Figure 4 and Figure 5 Ya Figure 6 797, '77 dneyama l [Mi L town] (1 shot) 1
~'' (January 311J, 1995. Patent Office Officer Uga Michibe 1, 1 display 11/(January 60, Part 2, Takehan No. 267841, Issue I
In the name of J, the name to be amended and the relationship with 1) Patent application Office: 2-43a2-4, Hatagaya, Shibuya-ku, Tokyo, pB Person: 5, Supplementary order date? , Contents of correction (1) Correct the drawing medium temperature diagram 6 as shown in the attached correction drawing. ), list of attached documents (1) 1 copy of amended drawings

Claims (2)

[Claims] (1) In an endoscopic forceps device configured to freely open and close a pair of forceps cups by advancing and retracting an operating rod, a connecting piece and a link are incorporated in the slotted opening cover and provide opening and closing movements to the pair of forceps cups. An endoscope characterized in that the hinge pin is inserted into the insertion hole, a recess larger than the insertion hole is formed in at least one of the connecting piece or the link, and the hinge pin is welded within the recess. Mirror forceps device. (2) The endoscopic forceps device according to claim 1, wherein the recess is formed by a chamfer or a counterbore.