JPS6066723A - Endoscope light source apparatus - 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] <Technical Field of the Invention> The present invention relates to a curved coil of an endoscope, and more particularly, to a curved coil of an endoscope. The present invention relates to a method for assembling a curved coil in an endoscope, in which the curved tube section of the insertion section -F is formed into a curve by manually operating a wire.

<Prior Art> As is well known, medical endoscopes such as gastrofiberscopes and bronchial fiberscopes insert the flexible body cavity insertion portion of the endoscope into the patient's body cavity to examine the affected area. It is used for observation, disposal, etc.

As shown in FIG. 1, this endoscope [1] consists of an operation section main body 2 for performing various operations at hand, and a flexible long body cavity insertion section 3 inserted into the patient's body cavity. It has become. The operation section main body 2 on this endoscope includes an eyepiece section 4, a bending operation knob 5, an insertion port 6 for a treatment instrument such as forceps, a treatment instrument raising operation knob 7, air supply and liquid supply buttons 8, A suction button 9 and the like are provided, and a light guide cord 10 connected to a light source device (not shown) for illumination is connected. The body cavity insertion section 3 includes a bendable long flexible tube section 11 connected to the operation section main body 2, and a flexible tube section 1.
a curved tube section 12 which is connected to the curved tube section 1 and which allows the distal end component 13 to be displaced in any direction by the curved operation knob 5 of the operation section main body 2; , 12 dormitory windows, a treatment instrument entrance/exit, an air supply port, a liquid supply port (none of which are shown), and the like.

As is well known, inside the flexible tube consisting of the flexible tube section 11 and the curved tube section 12 of the body cavity insertion section 3, there are light transmission members such as image guide fibers and light guide fibers, and treatment tools. Many built-in members such as an insertion tube, an air/liquid feeding tube, and an operating member of a treatment elevation device are passed through, and the distal ends of these built-in members are fixed to the distal end component 13.

Of the body cavity insertion section 3 on the endoscope, the curved tube section 12 can be bent by turning the bending operation knob 5, and its structure includes a large number of ring-shaped joint fittings connected in a flexible manner. A braid (wire mesh) is fitted around the outer periphery of a tubular body, and an elastic covering member made of synthetic resin or synthetic rubber is applied to the outer periphery.

Further, the flexible tube 14 of the flexible tube section 11 is constructed by providing a mesh tube on the outside of a spiral tube (not shown) and covering this with an elastic covering member such as a synthetic resin.

A curved coil 21 is inserted into the flexible tube 14 as shown in FIG. 2, and an operating wire 22 is further inserted into the curved coil 21. One end of the operating wire 22 is connected to the bending operation knob 5 via an operation mechanism (not shown) (15), and the other end is connected to the bending tube section 12.
through which it is coupled to the tip component 13.

Here, the curved coil 21 is, as shown in FIG.
One end is brazed to a joint ring 23 that connects the curved tube section 12 and the flexible tube section 11. On the other hand, the other end is
It is soldered to a stopper 26 having a flange 25, and the flange 25 is fitted into a groove 27 of a coil fixing portion 24 inside the operation section main body 2 and fixed therein.

In this case, as shown in FIG. 1, when the curved tube section 12 is bent, a large tension is applied to the operation wire located inside the curve, and this tension is applied to the operation section main body 2 and the curved tube section 12. will be pulled. Therefore, the flexible tube section 1
A compressive force is applied to 1, and due to this compressive force, the coil pitch of the curved coil 21 is reduced, and the operating wire 22 is relatively
has grown.

Due to this relative elongation of the operating wire 22, the conventional endoscope has a disadvantage in that the bending angle of the curved tube section 12 is reduced.

<Objective of the Invention> An object of the present invention is to provide an endoscope in which the curved portion of the endoscope is prevented from reducing its curved mark when the curved portion thereof is curved.

<Summary of the Invention> The present invention is a method for assembling a curved coil into an endoscope, in which a compressive force is applied to the curved coil when the coil is assembled into the endoscope.

<Embodiments of the invention> Hereinafter, one embodiment of this invention will be explained based on the drawings. and explain.

FIG. 3 shows an embodiment of the present invention, in which a flexible tube section 11 of an endoscope has a bending coil 21 through which an operating wire 22 is inserted. Flexible tube 14
This is made up of a spiral tube (not shown), a mesh tube covering the spiral tube, and a mesh tube covered with an elastic covering member such as synthetic resin.

A curved portion 12 is attached to one end of the flexible tube portion 11 via a joint tube 23 . This joint pipe 23 is connected to the curved pipe section 1
A ring-shaped joint fitting (not shown) provided within 2;
It is joined to the flexible tube 14. Further, one end of the curved coil 21 is brazed to the inner wall of the joint ring 23.

The other end of the curved coil 21 is connected to a stopper 2 having a collar 25.
6, and this collar portion 25 is soldered to the operating section main body 2.
It is fitted into and fixed in the groove 27 of the coil fixing part 24 inside the coil fixing part 24.

The operating wire 22 is connected to an operating mechanism (not shown) in the operating section main body 2, passes through a curved coil 216, and is further coupled to the tip component 13 via the curved tube section 12.

Next, a method for assembling the curved coil of this embodiment will be explained step by step.

One end of the curved coil 21 is brazed to the joint ring 23, and the other end is soldered to the fitting 26. After that, the operating wire 22 is inserted, and the 1F fitting 26 is fitted into the coil fixing part 24 in the operating section. Here, when fitting the stopper 26 into the coil fixing part 24 in the operating section, the curved coil 21 is compressed and inserted by an amount to compensate for the amount of shrinkage of the curved fill 21 when the curved tube section 12 is curved. That is, the curved coil 21 has a second metal fitting 25 at a position 1 longer than the above compression amount.
It is manufactured by soldering, and is compressed and assembled as described above when it is assembled into an endoscope.

The amount of compression varies depending on the length of the curved coil 21,
Further, since the maximum tensile force of the operating wire 22 differs depending on the bendable angle of the curved pipe portion 12, it is determined by comprehensively taking these into consideration.

By assembling the curved coil 21 into the endoscope using the above-described method of assembly, the curved coil 21 takes on a meandering shape around the operating wire 22, as shown in FIG.

As a result, even when the bending tube section 12 is bent by pulling the operation wire 22, the bending coil 21 applies a predetermined compressive force when it is assembled, in response to the above-mentioned compressive force acting on the bending coil 21. Since the coil pitch of the bending coil 21 is shortened and the operating wire 22 is relatively extended, the bending angle does not decrease.

This invention is not limited to the above-mentioned embodiments, but
The order in which the curved coils 21 are assembled into the endoscope may be changed as appropriate.

<Effects of the Invention> According to the present invention, when a curved coil is assembled into an endoscope, it is assembled while applying a compressive force to the curved coil, so that even when the curved tube portion of the endoscope is operated to curve, the curve angle is reduced. There's nothing to do.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an endoscope, FIG. 28 is a partial cross-sectional view showing a curved coil incorporated by a conventional method for incorporating a curved coil in an endoscope, and FIG. 3 is a perspective view showing an example of an endoscope. FIG. 3 is a partial cross-sectional view of one embodiment of a curved coil assembled by the It curved coil assembly method. 1... Endoscope 2... Operating unit main body 11... Flexible tube section 12... Curved tube section 21... Curved coil 22... Operation wire 9-

Claims (1)

[Scope of Claims] An endoscope whose curved portion is curved via an operating wire, characterized in that a curved coil through which the operating wire is inserted is assembled into the endoscope in a state where it is compressed by a predetermined amount. How to install a curved coil.