JP3249027B2 - Simple endoscope device - Google Patents

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 an illumination light supply unit for supplying illumination light to a light guide is mounted on an operation unit.

[0002]

2. Description of the Related Art Conventionally, a so-called simple type endoscope apparatus having a light emitting body for illumination in an operation section is generally provided with an illumination light supply unit including a miniature bulb and a dry battery in the operation section of the endoscope. It had an attached structure.

Recently, in order to prevent the end of the life of the battery during the endoscopic examination and to make it impossible to continue the endoscopic examination, an AC / DC adapter is attached in place of the battery and the commercial AC is inserted. It is also considered that a power supply can be used as a power supply.

[0004]

However, if such a commercial AC power supply is used as the power supply, in the event that the AC / DC adapter fails and a leakage occurs, the leakage current is reduced by the illumination light supply unit. To the patient via the operation unit, and the patient may get an electric shock.

[0005] Even when a battery is used as a power source, if the operator is receiving a leakage from another electric device or the like, the operator touches the illumination light supply unit, so that the illumination light is also emitted. There is a risk that the patient will get an electric shock from the supply unit via the operation unit.

Accordingly, the present invention provides a simple endoscope apparatus which can ensure electrical safety for a patient even if a leak occurs on the illumination light supply unit side, but does not transmit it to the endoscope side. The purpose is to provide.

[0007]

In order to achieve the above object, a simplified endoscope apparatus according to the present invention is arranged such that an incident end of a light guide for transmitting illumination light for illuminating a subject is arranged on an operation unit. And a unit connecting member for connecting the illumination light supply unit in the simple endoscope device in which an illumination light supply unit for supplying illumination light to the light guide is attached to the operation unit. It is characterized in that it is electrically insulated and connected and fixed to the conductive frame of the portion via an electrical insulating member.

[0008]

An embodiment will be described with reference to the drawings. FIG.
FIG. 7 is a side view of the operation unit 2 of the endoscope, and FIG.
The proximal end of the insertion section 1 covered by a flexible tube is connected to the lower end of the operation section 2.

The lower part of the operation part 2 at about three-quarters is a grip part 2a, and a forceps insertion port part 4 is provided between the grip part 2a and the insertion part 1 so as to project diagonally forward. Have been. Reference numeral 3 denotes a pressure adjusting valve for adjusting the pressure inside the airtight endoscope.

A suction operation valve 6 for performing a suction operation through a forceps channel (not shown) inserted into the insertion section 1 is provided to the operation mechanism section 5 above the grip section 2a of the operation section 2.
And a bending operation lever 7 for remotely bending a bending portion (not shown) formed at the distal end portion of the insertion portion 1 are disposed on the front and rear surfaces, and an eyepiece 8 protrudes from the upper surface. Have been.

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

Then, the light guide fiber bundle 9
Light supply unit 3 for supplying illumination light to
Numeral 0 is detachably attached to a side surface portion of the operation mechanism section 5.

As shown in FIG. 7, 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 supply for lighting the light source lamp 32. A certain battery 100 and the like are 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 a cap 50 detachably attached to the end of the illumination light supply unit 30. Instead of the battery 100, FIG.
, An AC / DC adapter 80 can be connected.

The AC / DC adapter 80 has a plug 8 that can be plugged into an outlet of a commercial AC power supply of 100 volts or 200 volts that is distributed to ordinary households.
The light source lamp 32 can be turned on by converting the commercial AC voltage into a DC voltage of, for example, 3 volts.

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

The bearing cylinder 12 for supporting the bending operation lever 7 and the suction operation valve 6 are inserted into separate holes formed in the main body case 11 and are watertightly sealed at respective portions. The bearing cylinder 12 and the base of the suction operation valve 6 are fixed to a strong and conductive frame 13 (hereinafter simply referred to as “metal frame 13”) such as a metal or carbon resin in the operation section 2. ing.

A cover 15 made of 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 mounted on the fitting surface. Water is prevented from entering the operation unit 2.

The fitting portion between the lid 15 and the main body case 11 has a rotation stopper 2 for regulating the relative rotation between them.
1 is formed. Although the O-ring 16 is crushed by being mounted, the figure shows a cross section in a natural state before being crushed (the same applies hereinafter).

At the center axis position of the through hole formed in the central portion of the cover 15, the base portion
The support cylinder 17 fixed to the support cylinder 17 is disposed. Then, the light guide mounting tube 18 screwed and connected to the support tube 17
However, it protrudes outward from the protruding end of the support cylinder 17.

An incident end of the light guide fiber bundle 9 is screwed and fixed at the center axis position of the light guide mounting tube 18, and the light guide fiber bundle 9 is incident on the protruding end of the light guide mounting tube 18. The convex meniscus lens 20 is water-tightly joined to the end face.

In a through hole formed in the cover 15, a unit receiving base 27 made of, for example, stainless steel for receiving (connecting) the illumination light supply unit 30 detachably attached to the operation unit 2 is directed outward. And is fixed by being pressed inward by a metal fastening ring 28 screwed to the support cylinder 17.

However, the unit cap 27 and the fastening ring 2
A cylindrical insulating tube 29 made of an electrically insulating plastic is interposed between the unit receiving base 27 and the fastening ring 28 so that the unit receiving base 27 and the fastening ring 28 do not come into contact with each other. The ring 28 is electrically insulated.

As described above, since both the lid 15 and the insulating cylinder 29 which are in contact with the unit receiving base 27 on the operation unit 2 side are electrically insulating, the unit receiving base 27 protruding outward from the operating unit 2 is provided. Even if a leakage current or the like flows from the outside, the leakage current does not propagate to other members of the operation unit 2.

An O-ring for sealing is mounted on the fitting portion between the members arranged inside the hole of the lid 15, and the operation unit 2 is provided with water from the outside in all parts. It has a watertight structure that does not invade. Needless to say, the insertion portion 1 is similarly formed in a watertight structure.

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

The outer wall of the battery compartment 30b is formed of an outer case 31b made of, for example, stainless steel or a metal or plastic having a chemical-resistant surface treatment, which has good corrosion resistance (chemical resistance). A tubular inner case 31a made of a material such as copper or a copper alloy such as phosphor bronze is inscribed and arranged.

At the boundary between the lamp compartment 30a and the battery compartment 30b, the lamp socket 33 to which the light source lamp 32 is removably inserted and attached is fixed to the inner case 31a via several parts. . The structure of the fixed portion will be described later.

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

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

A fixing ring 38 fixed to the lamp chamber case 35a by the rotation restricting pin 37 is fitted to the outer periphery of the lamp chamber case 35a, and is formed between a holding ring 35b and the outer case 31b screwed to the outer case 31b. The lamp chamber case 35a and the outer case 31b are fixed in the axial direction by being sandwiched therebetween. Reference numeral 39 denotes an O-ring for sealing a connection between the lamp chamber case 35a and the outer case 31b.

A reflecting mirror 34 for converging the illumination light radiated from the light source lamp 32 toward the incident end face of the light guide fiber bundle 9 is provided at the tip of the lamp chamber case 35a so as to surround the light source lamp 32. Adhesively fixed.

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

On the outer peripheral surface of the front end of the lamp chamber case 35a,
A male screw that is screwed with a female screw formed on the inner peripheral surface of the unit receiving base 27 is formed, and the illumination light supply unit 30 is connected to the operation unit 2 by connecting both screws. .

Then, after the illumination light radiated from the light source lamp 32 is reflected by the reflecting mirror 34,
The light passes through the light guide fiber bundle 9 and the convex meniscus lens 20 and converges on the incident end face of the light guide fiber bundle 9.

The illumination light supply unit 30 is detached from the operation unit 2 by releasing the screw connection between the unit receiving base 27 and the lamp chamber case 35a. 41 is
When the illumination light supply unit 30 is connected to the operation unit 2, the lamp chamber case 35a and the unit base 27
This is an O-ring for sealing the fitting portion with the O-ring.

The two electrodes projecting rearward from the light source lamp 32 are inserted into the socket 33 and are electrically connected to the connection pins 42a and 42b at the rear thereof. The base ends of the connection pins 42a and 42b are separately fixed to two electrode plates 43a and 43b arranged with an insulating plate 44 interposed therebetween.

The positive electrode of the battery 100 is always in contact with one of the electrode plates 43a.
b, via a holding cylinder 46 made of a good conductive metal,
The inner case 31a is electrically connected.

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

FIG. 2 shows the battery compartment 30b. A cap portion 50 is detachably screwed to an end of the cylindrical inner case 31a containing the battery 100, and the cap portion 50 turns on electricity between the battery 100 and the light source lamp 32. , A switch for turning off is incorporated.

Reference numeral 51b denotes an outer cylindrical body made of a material having good corrosion resistance, which forms the outer wall of the cap portion 50. An inner cylinder 51a made of a highly conductive metal, which is detachably screwed to the inner case 31a, is disposed inside the inner side thereof, and the outer cylinder 51b and the inner cylinder 51a are screwed together. And integrated with screws. 5
2 is an O-ring for sealing.

The outer case 3 on the battery chamber 30b side
1b and outer cylindrical body 51b on the side of cap 50
An O-ring (cap O-ring) 53 for sealing is attached to the fitting portion with the inner peripheral surface of the, so that water does not enter the inside from there.

On the other end of the inner cylinder 51a of the cap 50, a cap body 54 made of a highly conductive metal is screwed and integrally connected to the inner side of the outer cylinder 51b. Then, the first compression coil spring 55, one end of which is received by the cap portion main body 54, is pushed through the press ring 56 that fits inside the inner cylinder 51a so as to be movable in the axial direction.
The battery 100 is biased toward the lamp chamber 30a. Thereby, the contact between the positive electrode of the battery 100 and the electrode plate 43a is ensured.

The first compression coil spring 55 is arranged coaxially with the battery 100, and the press ring 56 is attached to the battery 10 so as not to contact the negative electrode of the battery 100.
0 is in contact with the periphery. Reference numeral 57 denotes a ring-shaped washer having good slippage.

Reference numeral 58 denotes a movable contact member which comes into contact with the negative electrode of the battery 100. The movable contact member 58 is formed in a cylindrical shape having a bottom portion by a rigid body made of a highly conductive metal, and is movable in the axial direction in the cap portion main body 54. It is inserted in.

The contact 58 a formed at the center of the bottom surface of the movable contact member 58 is pressed against the center of the negative electrode of the battery 100 by the second compression coil spring 66.

A guide pin 59 projecting from the outer peripheral surface of the movable contact member 58 is engaged with a guide groove 60 formed in the cap body 54 in the axial direction, so that the movable contact member 58 rotates around the axis. Is regulated. Further, the leaf spring 61 whose base is fixed to the cap portion main body 54 is connected to the guide pin 5.
9 is pressed against the head from the outside.

The guide pin 59 and the leaf spring 61 are also formed of a good conductive metal, and the negative electrode of the battery 100 includes the movable contact member 58, the guide pin 59, and the leaf spring 6
1. The negative electrode plate 43 via a good conductive metal that is sealed in the illumination light supply unit 30 such as the inner cylinder 51a and the inner case 31a, is isolated from the outside, and contacts each other.
b is electrically conducted.

Therefore, the battery 100 serves as a power source,
Light source lamp 3 with almost no voltage drop in the conductive path
2 lights up. Even if the illumination light supply unit 30 is immersed in a chemical solution or the like, each conductive member does not come into contact with the chemical solution, so that it does not corrode and can maintain good conductivity.

A rotary shaft 63 rotatable around the axis of the cap 50 is fitted inside the cylindrical movable contact member 58, and the rotary shaft 63 protrudes from the protruding end of the cap 50. A switch operation ring 64 is screw-bonded to and integrally connected to the head.

The switch operation ring 64 is formed in a substantially bowl shape and is disposed so as to surround the end of the cap portion 50. The switch operation ring 64 and the outer cylindrical body 51b inside the switch operation ring 64 are provided at the outer edge corners. A drain hole 64a for discharging water that enters during cleaning and disinfection is formed in a space between the drain hole 64a.

Although the number of the drain holes 64a may be one,
Since it is better to provide a plurality of drains, it is preferable to provide two at 180-degree symmetric positions, and to provide three or more leads to better drainage.

As described above, since the drain holes 64a are formed at the outer edge corners of the switch operation ring 64, the water entering the space between the switch operation ring 64 and the outer cylindrical body 51b inside the switch operation ring 64 at the time of cleaning and disinfection is provided. Is smoothly discharged, and the switch operation ring 6
No accumulation on the back side of 4. Reference numeral 65 denotes a decorative plate.

The head portion of the movable contact member 58 is
1b is rotatably fitted to the inner peripheral surface of the end portion, and an O-ring for sealing (switch O-ring) 67 is provided at the fitted portion.
Is installed to prevent water from entering the interior. In this way, the illumination light supply unit 30 has a watertight structure in which water does not intrude from the outside in all parts.

When the switch O-ring 67 and the cap O-ring 53 are compared, there is not much difference in the wire diameter, but the ring diameter of the cap O-ring 53 is much larger. Therefore, the sliding resistance against the rotational movement in the fitting portion is larger in the cap O-ring 53 than in the switch O-ring 67.

In this embodiment, the ring diameter of the cap O-ring 53 is about three times the ring diameter of the switch O-ring 67. However, if a difference of two or more times is provided in the ring diameter, a clear difference occurs in the sliding resistance against the rotational movement.

As shown in FIG. 3 showing a cross section taken along the line III-III, a lead pin 69 is provided on the outer peripheral surface of the rotating shaft 63 so as to project outwardly perpendicularly to the axis. 70 is
This is a leaf spring for giving resistance when the lead pin 69 rotates about the axis of the rotating shaft body 63 and reaches both end positions thereof.

The movable contact member 5 through which the lead pin 69 passes
A cam groove 71 and a circumferential groove 72 for escape are formed in the side wall of the cap 8 and the cap portion main body 54. Therefore, when the lead pin 69 is rotated about the axis of the rotary shaft 63, the movable contact member 58 is forcibly moved in the axial direction by the cam groove 71 against the urging force of the second compression coil spring 66. Then, the contact 58a is separated from the negative electrode of the battery 100, and the light source lamp 32 is turned off.

FIG. 4 shows the switch operating ring 6 in this manner.
FIG. 5 shows a state in which the switch is turned off by rotating 4
Shows a VV cross section thereof. In this embodiment, when the switch operating ring 64 is rotated by 90 degrees from the ON state, the lead pin 69 is rotated via the rotating shaft 63 that rotates integrally therewith, and the movable contact member 58 is moved to the cam groove 7.
1 and moves in the axial direction, so that the contact 58 a is separated from the negative electrode of the battery 100.

The center axis of rotation of the switch operating ring 64 is connected to the cap portion 5 which is screwed with the inner case 31a of the battery compartment 30b.
0 coincides with the rotation center axis of the inner cylindrical body 51a. However, as described above, the cap portion O-ring 53 has a larger ring diameter and a greater sliding resistance than the switch portion O-ring 67.

Therefore, when the switch operating ring 64 is rotated, the outer tubular body 51b of the cap 50 does not rotate with respect to the outer case 31b of the battery chamber 30b, and the inner tubular body 51a of the cap 50 and the battery chamber are not rotated. The screwing of the portion 30b with the inner case 31a does not become loose.

The battery 100 is urged by a first compression coil spring 55 in a direction opposite to the direction in which the movable contact member 58 is separated from the battery 100 by a switch operation. When,
Since the battery 100, the contact point 58a, the second compression coil spring 66, and the like are coaxially arranged, the battery 100 does not rattle in the battery chamber 30b in any of the ON and OFF states. It is kept in a stable state.

When removing the cap portion 50 from the illumination light supply unit 30 to replace the battery 100, the outer cylinder 51b is directly pinched and rotated by a finger to rotate the inner cylinder 51a and the inner case 31a. I just need to solve it.

As shown in FIG. 4, the leaf spring 61 pressing the head of the guide pin 59 is bent so as to come off from the state where the guide pin 59 is pressed just at the switch-off position. Therefore, a so-called click acts at that position, and a stable stationary state is obtained.

[0065]

According to the present invention, the unit connection member for connecting the illumination light supply unit to the endoscope operation unit is electrically insulated from the conductive frame of the operation unit via the electric insulating member. Since the connection and fixation are performed, even if there is a leak in the illumination light supply unit side, the leak is not transmitted to the operation unit of the endoscope, and electrical safety for the patient can always be ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a connection portion between an endoscope operation unit and an illumination light supply unit according to an embodiment.

FIG. 2 is a sectional view of a battery compartment and a cap of the illumination light supply unit according to the embodiment.

FIG. 3 is a sectional view taken along line III-III of the embodiment.

FIG. 4 is a cross-sectional view of a cap portion of the illumination light supply unit in an off state according to the embodiment.

FIG. 5 is a sectional view taken along line VV of the embodiment.

FIG. 6 is a side view of the simplified endoscope apparatus according to the embodiment.

FIG. 7 is a rear view of the simplified endoscope apparatus according to the embodiment.

FIG. 8 is a rear view of the simplified endoscope apparatus in a state where the AC / DC adapter of the embodiment is connected.

[Explanation of symbols]

 2 Operation unit 9 Light guide fiber bundle 13 Metal frame 27 Unit receiving base (unit connecting member) 29 Insulating cylinder (electric insulating member) 30 Illumination light supply unit

──────────────────────────────────────────────────続 き Continued on the front page (72) Kunitoshi Ikeda 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Optical Industry Co., Ltd. (72) Kuniyoshi Kaneko 2-36, Maenocho, Itabashi-ku, Tokyo 9 Asahi Optical Co., Ltd. (72) Inventor Takashi Oeda 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Optical Co., Ltd. (56) References JP-A-58-163331 (JP, A) 56-59005 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 1/00-1/32 G02B 23/24-23/26

Claims (1)

(57) [Claims] A light guide for transmitting illuminating light for illuminating a subject, an input end of the light guide being arranged on an operating portion, and an illuminating light supply unit for supplying illuminating light to the light guide being provided on the operating portion. In the attached simple endoscope apparatus, a member for screwing a metallic tubular unit connection member for connecting the illumination light supply unit to a screw-shaped member attached to a conductive frame of the operation unit. via an electrically insulating member pressed on the operation unit side from the outside of the operation portion by, thereby the outer wall surface portions of the electrically insulating sheathing member exterior of the operation section, an outer edge portion of the unit connection member Wherein the unit connecting member is fixed to the operation section by contacting a step formed in the endoscope.