JPH08313827A - Simple type endoscope - Google Patents

Abstract

PURPOSE: To reduce the size and weight of an operation part by holding the incident end of a light guide at the end on the reverse side of a curvilinear operation bearing member which pivotally supports the revolving shaft of a curvilinear operation mechanism on one end side. CONSTITUTION: The curvilinear operation bearing member 22 which freely rotatably and pivotally supports the inner end part of a curvilinear operation shaft 13 on the end side 22a projecting to the curvilinear operation mechanism side is fixed by means of machine screws to a metallic frame 18. The curvilinear operation bearing member 22 is largely projected from the metallic frame 18 in a direction reverse from the curvilinear operation mechanism side. This projecting part is formed to a cylindrical part having a notched groove 22b on a lower side (i.e., the side nearer the insertion part). The incident end 9a of a light guide fiber bundle 9 for illumination is arranged therein. The incident end 9a of the light guide fiber bundle 9 is easily and efficiently held in the operation part 2 in such a manner, by which the size and weight of the operation part 2 are reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple endoscope apparatus in which a light guide has an incident end portion arranged in an operating portion.

[0002]

2. Description of the Related Art In a so-called simple endoscope device or the like, generally, an incident end portion of a light guide is arranged in an operating portion, and a miniature bulb for supplying illumination light and a dry battery are built in the light guide. The illumination light supply unit is attached to the operation unit.

[0003]

The operation portion of the endoscope should be made as small and lightweight as possible in order to improve the operability, and the simple endoscope apparatus that requires simple handling is particularly small in size. It needs to be lightweight.

However, as compared with a normal endoscope having a structure in which the light guide simply passes through the inside of the operating portion, in the simple endoscope device in which the incident end of the light guide is arranged inside the operating portion, Since a mechanism for holding the incident end of the guide on the frame is required, the structure inside the operation unit becomes complicated accordingly, which violates the demand for size reduction and weight reduction.

Therefore, an object of the present invention is to provide a simplified endoscope apparatus capable of easily and efficiently holding the entrance end portion of the light guide in the operating portion and realizing a reduction in size and weight of the operating portion. To do.

[0006]

In order to achieve the above object, the simple endoscope apparatus of the present invention is a bending operation mechanism for remotely bending a bendable bending portion formed in an insertion portion. And an incident end portion of a light guide for transmitting illumination light are arranged in an operating portion connected to a base end of the insertion portion, and an illumination light supply unit for supplying illumination light to the light guide is provided. In a simplified endoscope device attached to an operating portion, the end portion on the opposite side of the bending operation bearing member fixed to the frame in the operation portion and pivotally supporting the rotation shaft of the bending operation mechanism at one end side is The light guide is characterized in that it holds the entrance end thereof.

[0007]

Embodiments will be described with reference to the drawings. Figure 2
A side view of the operation unit 2 portion of the endoscope, FIG. 3 is a rear view,
The base end of the insertion part 1 which is covered with a flexible tube is connected to the lower end of the operation part 2.

The lower part of the operation portion 2 of about three-quarters is a grip portion 2a, and a forceps insertion port portion 4 is provided between the grip portion 2a and the insertion portion 1 so as to project obliquely forward. Has been. Reference numeral 3 is a pressure adjusting valve for adjusting the pressure inside the airtightly configured endoscope.

A suction operation valve 6 for performing a suction operation through a forceps channel (not shown) inserted in the insertion portion 1 in the operation mechanism portion 5 above the grip portion 2a of the operation portion 2.
And a bending operation lever 7 for remotely bending and bending a bendable bending portion (not shown) formed at the distal end portion of the insertion portion 1 are arranged on the front surface and the rear surface, and the eyepiece portion 8 is on the upper surface. Is projected on.

An illumination light guide fiber bundle 9 for transmitting illumination light for illuminating a subject has an incident end portion arranged in an operation mechanism portion 5, and has a grip portion 2a of the insertion portion 1 and the operation portion 2. Through the inside, the ejection end portion is arranged at the tip of the insertion portion 1.

Then, the light guide fiber bundle 9
Illumination light supply unit 4 for supplying illumination light to the
0 is detachably attached to the side surface portion of the operation mechanism unit 5.

As shown in FIG. 3, the illumination light supply unit 40 includes a light source lamp 42 for emitting illumination light to be supplied to the light guide fiber bundle 9 and a power source for turning on the light source lamp 42. A certain battery 100 or the like is built in. As the battery 100, any battery such as a dry battery or a rechargeable nickel-cadmium battery may be used.

The battery 100 is replaceable by removing the cap portion 50 detachably attached to the end portion of the illumination light supply unit 40.
It is also possible to connect a DC adapter or the like.

FIG. 1 is a rear cross-sectional view of the upper half of the operating section 2 with the illumination light supply unit 40 removed, and a main body case 11 for covering the operating mechanism section 5 of the operating section 2.
Is made of electrically insulating plastic.

The bending operation lever 7 is constructed by covering the surface of a metal lever body 7a with an electrically insulating plastic cover 7b, and is connected to the outer end of a rotatable bending operation shaft 13 by a fixing screw 14. It is fixed. 15
Is a bearing attached to the main body case 11 so as to rotatably receive the bending operation shaft 13, and an O-ring for sealing is arranged on each of the inner and outer peripheral surfaces thereof.

A rotating arm 16 is connected near the inner end of the bending operation shaft 13 so as to rotate integrally with the bending operation shaft 13, and a bending operation wire 17 is connected to the rotating arm 16.
The base end of is attached.

Therefore, by rotating the bending operation lever 7, the rotating arm 1 is rotated via the bending operation shaft 13.
6, the bending operation wire 17 is pulled, and the bending portion bends in a predetermined direction.

Reference numeral 18 is a metal frame fixed in the operation portion 2, and is fixed to the main body case 11 via a metal angle member 19 by a nut 20 for fixing the bearing 15 to the main body case 11. . Reference numeral 21 is a small screw for connecting and fixing the metal frame 18 and the metal angle member 19.

The space inside the operating section 2 is partitioned by a metal frame 18 into a running section for the bending operation wire 17 and a running section for other members (such as the light guide fiber bundle 9). Reference numeral 24 is a supporting tube of the eyepiece, which is fixed to the main body case 11 by a fixing nut 25.

A bending operation bearing member 22, which rotatably supports the inner end portion of the bending operation shaft 13 on the end portion side 22a protruding toward the bending operation mechanism, is fixed to the metal frame 18 with a machine screw. .

The bending operation bearing member 22 largely projects from the metal frame 18 in the direction opposite to the bending operation mechanism side. The projecting portion is formed in a tubular shape having a cutout groove 22b on the lower side (that is, the side closer to the insertion portion 1), and the incident end portion 9a of the light guide fiber bundle 9 is inside thereof.
Is arranged.

A lid 25 made of electrically insulative plastic is fitted into an opening formed on a side surface of the main body case 11 opposite to the side where the bending operation lever 7 is arranged. An O-ring 26 for sealing is attached to this so that water does not enter the inside of the operation portion 2 through the gap of the fitting portion.

At the position of the central axis of the through hole formed in the central portion of the lid 25, the base portion is the metal frame 1 as described above.
The tubular portion of the bending operation bearing member 22 fixed to 8 is located. The light guide mounting cylinder 28 screwed and fixed to the bending operation bearing member 22 projects outward from the projecting end of the tubular portion of the bending operation bearing member 22.

The incident end 9a of the light guide fiber bundle 9 is screwed and fixed to the central axis position of the light guide mounting tube 28, and the light guide fiber bundle 9 is provided with a cutout groove 22b of the bending operation bearing member 22. Through the operating portion 2 and into the insertion portion 1. A convex meniscus lens 30 is watertightly bonded to the projecting end portion of the light guide mounting tube 28 so as to face the incident end surface of the light guide fiber bundle 9.

A unit socket 27 made of, for example, stainless steel for receiving (connecting) the illumination light supply unit 40 that is attached to and detached from the operating portion 2 is provided in the through hole formed in the lid 25 toward the outside. It is fitted so as to protrude, and is fixed by being pressed inward by a metal tightening ring 38 screwed to the projecting end portion of the bending operation bearing member 22.

However, the unit socket 27 and the tightening ring 3
A cylindrical insulating tube 29 made of electrically insulating plastic is interposed between the unit receiving cap 27 and the tightening ring 38 so that the unit receiving cap 27 and the tightening ring 38 do not come into contact with each other. The ring 38 and the ring 38 are electrically insulated.

An O-ring for sealing is attached to the fitting portion between the respective members arranged inside the hole of the lid body 25, and the operation portion 2 is protected from the outside water at all portions. It has a watertight structure that does not enter.

[0028]

According to the present invention, by holding the entrance end of the light guide at the opposite end of the bending operation bearing member that pivotally supports the rotary shaft of the bending operation mechanism at one end side, It is possible to reduce the size and weight of the operating unit by minimizing the parts and space for holding the entrance end in the operating unit.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a rear portion of an operation unit with an illumination light supply unit according to an embodiment removed.

FIG. 2 is a side view of the simplified endoscope apparatus according to the embodiment.

FIG. 3 is a rear view of the simplified endoscope apparatus according to the embodiment.

[Explanation of symbols]

 2 Operation part 9 Light guide fiber bundle 9a Incident end 13 Curved operation shaft 18 Metal frame 22 Curved operation bearing member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takisuke Adachi 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Kogaku Kogyo Co., Ltd. (72) Kunito Ikeda 2-36 Maenocho, Itabashi-ku, Tokyo No. 9 Asahi Kogaku Kogyo Co., Ltd. (72) Inventor Kuniyoshi Kaneko 2-36-9 Maeno-cho, Itabashi-ku, Tokyo Inside Asahi Kogaku Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A bending operation mechanism for remotely bending a bendable bending portion formed in an insertion portion and an incident end portion of a light guide for transmitting illumination light are provided at a base end of the insertion portion. In a simple endoscope device in which an illumination light supply unit for supplying illumination light to the light guide is attached to the operation portion while being arranged in the connected operation portion, the simplified endoscope device is fixed to the frame in the operation portion. A simplified endoscope apparatus characterized in that an entrance end of the light guide is held at an opposite end of a bending operation bearing member that pivotally supports a rotation shaft of the bending operation mechanism at one end side.