JPH0919405A - Simple endoscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple endoscopic device in which a pressure ring screwed to the other member for fixing a mechanism arranged in an illumination light supplying unit is not likely loosened when the illumination light supplying unit is detachably attached to an operating part. SOLUTION: A pressure ring 35b which is disposed exposedly on the outer circumference near the head of an illumination light supplying unit 30, and is screwed to the other member 31b of the illumination light supplying unit 30 for pushing and fixing a mechanism arranged on the illumination light supplying unit 30 is arranged so that it is positioned inside a member 27 arranged on an operating part 2 side when the illumination light supplying unit 30 is connected to the operating part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simplified endoscope apparatus in which an illumination light supply unit for supplying illumination light to a light guide is attached to an operation section.

[0002]

2. Description of the Related Art In a so-called simple endoscope device in which a light emitting body for illumination is provided in an operating portion, generally, an illumination light supply unit including a miniature bulb and a dry battery is provided with respect to the operating portion of the endoscope. It is designed to be detachably inserted and connected.

[0003]

The illumination light supply unit is generally formed in a cylindrical shape. Due to its structure, a pressing member screwed to another member to fix the mechanism arranged in the illumination light supply unit. In many cases, the ring is provided so as to be exposed on the outer peripheral surface of the illumination light supply unit.

Therefore, when the illumination light supply unit is attached to or detached from the operating portion of the endoscope, the pressing ring is mistakenly turned to loosen the screw engagement with other members, and the mechanism of the illumination light supply unit is reduced. Partial removal or rattling could occur. Especially, when the connection between the illumination light supply unit and the operation unit side is performed by screwing, the possibility is high.

Therefore, according to the present invention, the holding ring provided by screwing with another member for fixing the mechanism arranged in the illumination light supply unit is loosened when the illumination light supply unit is attached to or detached from the operation portion. An object is to provide a simple endoscope device without fear.

[0006]

In order to achieve the above object, in the simplified endoscope apparatus of the present invention, the incident end portion of the light guide for transmitting the illumination light for illuminating the subject is arranged in the operation portion. In the simplified endoscope apparatus, the illumination light supply unit for supplying the illumination light to the light guide is detachably inserted and connected to the operation section. The illumination light supply unit includes a pressing ring that is exposed on the outer peripheral surface in the vicinity and is screwed with another member of the illumination light supply unit to press and fix a mechanism arranged in the illumination light supply unit. Is arranged so as to be positioned inside the member provided on the side of the operating portion when connected to the operating portion.

The mechanism which is pressed and fixed by the pressing ring may be a mechanism for accommodating the light source lamp provided in the illumination light supply unit. Further, the member provided on the operation portion side may project from the operation portion side in a tubular shape, and the member is a connection member for connecting the illumination light supply unit to the operation portion. Good.

[0008]

Embodiments will be described with reference to the drawings. FIG. 2 is a side view of the operation section 2 portion of the endoscope, and FIG. 3 is a rear view of the operation section 2. There is.

The lower three-quarters portion of the operation portion 2 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 operating a 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 an eyepiece portion 8 is provided on the upper surface. Has been done.

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

And, the light guide fiber bundle 9
Illumination light supply unit 3 for supplying illumination light to
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 30 includes a light source lamp 32 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 32. 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 of the illumination light supply unit 30, and an AC / DC adapter or the like may be connected instead of the battery 100. it can.

FIG. 1 shows an operation unit 2 and an illumination light supply unit 3.
The main body case 11 which shows the vicinity of the connection portion with 0 and covers the operation mechanism portion 5 of the operation portion 2 is made of electrically insulating plastic.

The bearing cylinder 12 for supporting the bending operation lever 7 and the suction operation valve 6 are fitted and inserted in separate holes formed in the main body case 11, and are watertightly sealed at each part. The bearing tube 12 and the base of the suction operation valve 6 are fixed to a metal frame 13 in the operation section 2.

A lid 15 made of an electrically insulating plastic is fitted into a large side opening formed in the main body case 11, and an O-ring 16 for sealing is attached to the fitting surface so that it can be removed from the gap. Water does not enter the inside of the operation unit 2.

A rotation stopper 2 for restricting relative rotation between the lid 15 and the main body case 11 is provided at the fitting portion.
1 is formed. Although the O-ring 16 is crushed by being attached, the figure shows a cross section in a natural state before crushing.

At the central axis position of the through hole formed in the central portion of the lid body 15, the base portion is the metal frame 13 inside the operation portion 2.
A support cylinder 17 fixed to the is arranged. Then, the light guide mounting cylinder 18 screwed and connected to the support cylinder 17
However, it protrudes outward from the projecting end of the support cylinder 17.

The incident end of the light guide fiber bundle 9 is screwed and fixed at the central axis position of the light guide mounting tube 18, and the light guide fiber bundle 9 is incident on the projecting end portion of the light guide mounting tube 18. A convex meniscus lens 20 is watertightly joined to face the end face.

In the through hole formed in the lid body 15, there is provided a unit socket 27 made of, for example, stainless steel in a cylindrical shape for receiving (connecting) the illumination light supply unit 30 which is attached to and detached from the operating section 2. , Is fitted so as to project outward, and is fixed by being pressed inward by a metal tightening ring 28 screwed to the support cylinder 17. An O-ring for sealing is attached to the fitting portion between each member.

However, the unit socket 27 and the tightening ring 2
A cylindrical insulating tube 29 made of electrically insulating plastic is interposed between the unit receiving mouth 27 and the tightening ring 28 so that the unit receiving mouth 27 and the tightening ring 28 do not come into contact with each other. The ring 28 is 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 15, and the operating portion 2 is protected from water from the outside at all portions. It has a watertight structure that does not enter. Of course, the insertion portion 1 is also formed in a watertight structure.

The illumination light supply unit 30 is formed in a straight cylindrical shape as a whole, and has a lamp chamber portion 30a near the connection portion with the operation portion 2 and a battery on the side remote from the connection portion with the operation portion 2. It is divided into a chamber portion 30b, and FIG. 1 shows the entire lamp chamber portion 30a.

The outer wall of the battery chamber portion 30b is formed by an outer case 31b having good corrosion resistance (chemical resistance), for example, made of stainless steel, metal or plastic having a chemical resistant surface treatment, and the inside thereof is electrically conductive. A cylindrical inner case 31a made of copper or a copper alloy having good properties such as phosphor bronze is inscribed and arranged.

At the boundary between the lamp chamber portion 30a and the battery chamber portion 30b, the lamp socket 33 to which the light source lamp 32 is detachably inserted and attached is fixed to the inner case 31a through some components. . The structure of the fixed portion will be described later.

The cylindrical lamp chamber case 35a constituting the outer wall of the lamp chamber portion 30a is made of strong stainless steel, for example, and is fixedly connected to the outer case 31b.

Lamp chamber case 35a and outer case 31b
The rotation restricting pin 37 protruding from the lamp chamber case 35a is rotated in the groove 36 formed in the outer case 31b.
Is regulated by engaging with.

Further, a fixed ring 38 fixed to the lamp chamber case 35a by a rotation restricting pin 37 is rotatably fitted to the outer periphery of the lamp chamber case 35a so as to be attached to the outer case 31.
The lamp chamber case 35a and the outer case 31b are fixed in the axial direction by being sandwiched between a pressing ring 35b screwed with b and the outer case 31b. Therefore,
When the pressing ring 35b and the outer case 31b are loosely screwed together,
The continuous state of the lamp chamber case 35a and the outer case 31b becomes loose.

The pressing ring 35b is formed so that its outer diameter is smaller than that of the outer case 31b arranged immediately after it.
Further, it is formed to be thinner than the inner diameter of the unit receiving cap 27 on the operation portion 2 side, and the outer peripheral surface thereof is the illumination light supply unit 30.
Is exposed on the outer surface near the tip of. Reference numeral 39 is an O-ring for sealing the connecting portion between the lamp chamber case 35a and the outer case 31b.

A reflection mirror 34 for converging the illumination light emitted from the light source lamp 32 toward the incident end surface of the light guide fiber bundle 9 surrounds the front end of the light source lamp 32 at the front end portion of the lamp chamber case 35a. It is fixed by adhesion.

A transparent cover glass 49 is fixed to the front end surface of the reflecting mirror 34 by a pressing nut 40. A sealant is applied to the outer peripheral surface of the cover glass 49, and is sealed so that water does not enter the lamp chamber case 35a from the outside.

On the outer peripheral surface of the front end of the lamp chamber case 35a located at the forefront of the illumination light supply unit 30, a male screw which is screwed with a female screw formed on the inner peripheral surface of the unit receiving cap 27 is formed. The state in which the illumination light supply unit 30 is connected to the operation portion 2 as shown in FIG. 1 by inserting the front side of the illumination light supply unit 30 into the unit socket 27 and connecting both screws thereof. become.

Then, the illumination light emitted from the light source lamp 32 is reflected by the reflecting mirror 34, and then the cover glass 4
After passing through 9 and the convex meniscus lens 20, they converge and enter the incident end surface of the light guide fiber bundle 9.

In this state, the front half of the pressing ring 35b is located inside the unit receiving cap 27. Therefore, when the illumination light supply unit 30 is gripped and connected to the unit receiving base 27, if the pressing ring 35b is touched by the hand, the illumination light supplying unit 30 cannot be coupled to the unit receiving base 27. Supply unit 30
To connect the unit to the base 27 of the unit.
Do not touch b.

Further, the illumination light supply unit 30 is detached from the operation portion 2 by unscrewing the screw connection between the unit socket 27 and the lamp chamber case 35a, but the pressing ring 35b is not touched at this time either. .

Reference numeral 41 denotes an O for sealing the fitting portion between the lamp chamber case 35a and the unit receiving cap 27 when the illumination light supply unit 30 is connected to the operation portion 2.
It is a ring.

The two electrodes protruding rearward from the light source lamp 32 are inserted into the socket 33 and electrically connected to the connection pins 42a, 42b on the rear side thereof. The base end of each connection pin 42a, 42b is divided and fixed to two electrode plates 43a, 43b arranged with an insulating plate 44 interposed therebetween.

The positive electrode of the battery 100 is always in contact with the one electrode plate 43a and the other electrode plate 43a is in contact therewith.
In b, via a holding cylinder 46 made of a highly conductive metal,
The inner case 31a is electrically connected.

These members are surrounded by an electrically insulating cylindrical body 45, and are pressed and fixed together with the socket 33 to the inner case 31a by a pressing nut 47 screwed to the inner case 31a.

[0041]

According to the present invention, another member of the illumination light supply unit for fixing the mechanism provided on the outer peripheral surface of the distal end portion of the illumination light supply unit and fixed to the illumination light supply unit. When the illumination light supply unit is attached to or detached from the operation portion side, the pressing ring screwed with is arranged so as to be located inside the member on the operation portion side when the illumination light supply unit is connected to the operation portion. Since the pressing ring is not touched by the hand, there is no risk that the pressing ring will loosen and the mechanism of the illumination light supply unit will partly come off or rattling will occur.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connecting portion between an endoscope operating portion and an illumination light supply unit according to an embodiment of the present invention.

FIG. 2 is a side view of the simplified endoscope device according to the embodiment of the present invention.

FIG. 3 is a rear view of the simplified endoscope device according to the embodiment of the present invention.

[Explanation of symbols]

 2 Operation part 9 Light guide fiber bundle 27 Unit socket 30 Illumination light supply unit 31b Outer case 32 Light source lamp 35b Holding ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunitoshi Ikeda 2-39 Maeno-cho, Itabashi-ku, Tokyo Asahi Kogaku Kogyo Co., Ltd. (72) Inventor Kuniyoshi Kaneko 2-36-36 Maeno-cho, Itabashi-ku, Tokyo No. 9 Asahi Kogaku Kogyo Co., Ltd. (72) Inventor Takashi Koeda 2-36 Maeno-cho, Itabashi-ku, Tokyo Tokyo Asahi Kogaku Kogyo Co., Ltd.

Claims (4)

[Claims] 1. An incident end portion of a light guide for transmitting illumination light for illuminating a subject is arranged in an operation portion, and an illumination light supply unit for supplying illumination light to the light guide is provided with respect to the operation portion. In a simple endoscope device that is detachably inserted and connected, a mechanism provided on the outer peripheral surface near the distal end of the illumination light supply unit and disposed in the illumination light supply unit is pressed down. A pressing ring screwed with another member of the illumination light supply unit to fix the same inside the member provided on the operation section side when the illumination light supply unit is connected to the operation section. A simple endoscope device characterized by being arranged so as to 2. The simplified endoscope apparatus according to claim 1, wherein the mechanism that is pressed and fixed by the pressing ring is a mechanism for accommodating a light source lamp provided in the illumination light supply unit. 3. The simplified endoscope apparatus according to claim 1 or 2, wherein the member provided on the side of the operating portion projects in a tubular shape from the side of the operating portion. 4. The simplified endoscope apparatus according to claim 1, wherein the member provided on the operation portion side is a connection member for connecting the illumination light supply unit to the operation portion.