JPH05220104A - Endoscope - Google Patents

Abstract

PURPOSE:To provide the endoscope which is simple in construction, can change over air feeding and gas feeding and can improve washability. CONSTITUTION:This endoscope is provided with a 1st mouthpiece 20 which communicates with an air feed source 22 and a 2nd mouthpiece 21 which communicates with a control valve 24 and is arranged near the 1st mouthpiece 20. The air feeding and gas feeding are respectively executed by selectively connecting the air feed source 22 and a gas feed source 32 via the 1st mouthpiece 20 and the 2nd mouthpiece 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope capable of selectively supplying air and gas.

[0002]

2. Description of the Related Art An endoscope capable of selectively supplying not only conventionally used air but also gas such as CO2 is
As disclosed in Japanese Utility Model Laid-Open No. 62-78902, a gas pipeline is provided from the connector section to the operating section in addition to the air pipeline, and an air feeding valve or a gas feeding valve is selected and operated. It was for supplying air or gas.

With the above-mentioned structure, the number of gas lines is increased as compared with an endoscope having no gas feeding function, so that it takes a long time to clean the endoscope. In addition, since it merges with the water pipe, etc. on the insertion side, a check valve must be provided, which makes it difficult to remove dirt and regulates the direction and pressure of the washing liquid. ..

As a means for solving the above drawbacks, there is Japanese Utility Model Laid-Open No. 62-125501. That is, in the endoscope described in this publication, the air supply conduit and the gas supply conduit are used as a common conduit, and the valve element (piston) in the switching operation valve provided in the operation unit is replaced. The switching state of air supply or gas supply can be changed. In this way, the method of replacing the valve body for air and water supply and the valve body for gas and water supply according to the application of use is such that the conventional air supply pipe line can be used as it is as a gas supply pipe line. Since there is no need to newly provide a gas supply system, there is an advantage that the endoscope can be made compact, good operability of the endoscope can be maintained as it is, and cleaning is easy.

Further, the connection of the air supply pump and the gas cylinder to the common conduit is performed by connecting a gas supply pipe branched from the common conduit to a connector portion at the extension tip of the universal cord of the endoscope. A conduit and an air supply conduit are provided, and the supply source is connected to one of the conduits. That is,
In the case of gas supply, an adapter for gas supply is provided between the gas supply line and the water supply tank to connect the gas supply source and plug the opening of the air supply line. When connected in this manner, the gas supply pipeline and the common pipeline are communicated with each other and gas can be transmitted. On the other hand, for air supply, remove the gas supply adapter and connect it so that the gas supply pipeline and the water supply tank communicate with each other.
Further, an air supply source is communicatively connected to the air supply line. That is, the gas can be sent by connecting the gas sending line and the common line.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the endoscope described in Japanese Patent No. 78902, since the gas pipeline is increased, it takes a long time to clean the endoscope. In addition, since it joins with the water pipe of the insertion side and the like, a check valve must be provided, which makes it difficult to remove dirt. Further, there is a drawback that the structure is complicated.

Further, the one disclosed in Japanese Utility Model Laid-Open No. 62-125501 has a drawback in that water is likely to be accumulated in the gas / water supply valve and the air / water supply valve at the time of washing and the structure is complicated. ..

The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope which has a simple structure and is capable of switching between air supply and gas supply, and at the same time, which can improve the cleaning property. I am trying.

[0009]

The endoscope of the present invention is an endoscope having an air / water supply pipe for supplying air or gas and water, and a means for controlling air / water supply. A mouthpiece that is detachably connectable to an air supply source, and is provided with a first mouthpiece that communicates, and a second mouthpiece that communicates with the control means and that is disposed in the vicinity of the first mouthpiece. First
Either the air supply source is connected via the mouthpiece or the gas supply source is connected to the second mouthpiece, or either one is selectively connected.

[0010]

[Operation] With this configuration, when sending air, the air supply source is connected via the first mouthpiece to send air, while when sending gas, the gas supply source is connected to the second mouthpiece. And send gas.
Air supply and gas supply can be selectively carried out via the first and second caps, and the cleanability can be improved due to the simple structure.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 relate to a first embodiment of the present invention, FIG. 1 is an overall configuration diagram of an endoscope apparatus, and FIG.
3 and 4 are cross-sectional views of the main part, FIG. 5 is a cross-sectional view of the distal end of the endoscope, FIG. 6 is a CCD detailed view and cross-sectional view, and FIG. 7 is another CCD cross-sectional view. 8 is a sectional view for explaining the CCD and the field mask portion, and FIGS. 9 to 11 are sectional views of the tip portion.

As shown in FIG. 1, an endoscope apparatus 1 includes an endoscope 2, a light source / air supply / water supply apparatus 3, and a video processor 4.
It has and.

The endoscope 2 is provided with an elongated and flexible insertion portion 5 and a large-diameter operation portion 6 which is connected to the rear end of the insertion portion 5. A flexible universal cord 7 extends laterally from the operation portion 6, and the end portion of the universal cord 7 is bifurcated. A connector 8 is provided at one end and an electrical connector 9 is provided at the other end. The connector 8 is a light source / air supply / water supply device 3
It is designed to be connected to. Further, the electrical connector 9 is adapted to be connected to the video processor 4. A monitor (not shown) or the like is connected to the video processor 4.

The endoscope insertion portion 5 is, in order from the distal end side,
It comprises a rigid tip portion 5a, a bendable bending portion 5b, and a flexible tube 5c having flexibility.

At the end 5a, an objective optical system 10, an illumination optical system 11, a suction port forceps outlet 12, and an air / water feeding nozzle 13 are provided.

The operation section 7 has an air / water supply operation button 1
4, suction operation button 15, bending operation knob 16, forceps opening 1
7 is provided.

As shown in FIGS. 1 and 2, the connector portion 8 has an air supply source (air supply pump = air supply pump = light source / air supply device 3).
P) 22, an air supply mouthpiece 18 connected to the water supply tank (water supply source) 23, a water supply mouthpiece 19 connected to the water supply tank (water supply source) 23, a first mouthpiece 20 communicating with the air supply mouthpiece 18, and an air supply / water supply operation button 14.
Air / gas control valve (V
1) A second base 21 communicating with 24 is provided.

The air / water supply button 14 also controls the water supply control valve (V2) 25. The tubes 26 and 27 are provided with an air supply cap 18 and a first cap 2 respectively.
The second and second mouthpieces 21 and the air / gas feeding control valve 24 are connected to each other.

In FIG. 4, reference numeral 28 is an exterior of the connector portion 8. The nuts 29 and 30 fix the first base 20 and the second base 21 to the exterior 28 of the connector portion 8, respectively. As shown in FIGS. 4 and 2, the connection tube 31 is adapted to detachably connect the first base 20 and the second base 21 to allow communication.

As shown in FIGS. 5 and 2, the second cylinder 21 has a gas cylinder (gas feed source) 32 shown in FIG.
While the gas tube 33 connected to the above can be detachably connected, a plug 34 can be attached to the first base 20 as well.

Therefore, as shown in FIG. 4, the first base 2
0, in the case of the configuration in which the connection tube 31 is connected to the second base 21, the air supply source 22 pressurizes the water supply tank 23, and the tube 26, the connection tube 31, and the tube 2
The air is sent to the air / gas control valve 24 via 7. When the air / gas feed control valve 24 is opened by operating the air / water feed operation button 14, air is fed from the water feed nozzle 13.

Further, as shown in FIG. 5, the second base 21
In the case of the configuration in which the gas tube 33 is connected to the first mouthpiece 20 and the plug 34 is connected to the first mouthpiece 20, the air supply source 22 only pressurizes the water supply tank 23, and the gas in the gas cylinder 32 becomes the gas tube 33 and the tube 27. And is sent to the gas / gas control valve 24. Here, the air / water supply operation button 14
When the air / gas control valve 24 is opened by the operation of
Gas is sent from the water supply nozzle 13.

According to the present embodiment, the air / gas switching can be switched with a simple structure having no air / gas switching mechanism inside the endoscope, and the cleanability of the endoscope conduit can be improved. Since the air and gas are common pipes, it is possible to save the trouble of washing extra pipes.

As shown in FIG. 3, the tip portion 5a has a tip forming member 37. Inside the tip forming member 37,
The objective optical system 10, the illumination optical system 11, the suction port forceps outlet 12, and the air / water feeding nozzle 13 are provided.

The lens group 35 of the objective optical system 10 is housed in a lens frame 36 and is watertightly fixed to a tip end main body 37.

A field mask 39 is provided on the CCD fixing frame 38.
The CCD 40, which is adhesively fixed through the objective optical system 1
The lens frame 36 and the CCD fixing frame 38 are arranged at an image forming position of 0 by adhesion.

As shown in FIG. 6B, the CCD 40 is
A CCD element 42 die-bonded to the substrate 41;
Cover glass 4 for protecting the image pickup surface of the CCD element 42
3, and a sealing resin 44 that seals the entire CCD element 42. The substrate 41 and the CCD element 42 are electrically connected by a plurality of bonding wires 45, and further electrically connected to a plurality of external leak terminals 46 provided on the substrate 41.

A step portion 47 is provided on the surface side of the cover glass 43, and the step portion 47 is covered with a sealing resin 44. As shown in FIG. 6A, the stepped portion 47 may have an octagonal shape in accordance with the image output shape on the monitor, or may have a circular shape (not shown).

Alternatively, as in the CCD 40A shown in FIG. 7, stepped portions 62 may be formed on both the front and back sides of the cover glass 61. The sizes of the front and back 62 may be changed according to the optical use range. Further, chamfering may be used instead of the step.

With this structure, the adhesive area between the cover glass 43 and the sealing resin 44 increases, so that it is difficult for the cover glass 43 and the sealing resin 44 to peel off from each other, so that the infiltration of moisture into the CCD element 42 is prevented. It can be kept to a minimum.

The field mask 39 shown in FIG. 8 is a thin metal plate processed by photo-etching or the like and subjected to black plating or the like. Therefore, sagging occurs in the etched portion according to the etching direction.

The sagging surface 48 is C as shown in FIG. 8 (b).
It is placed toward the CD40 side. On the other hand, FIG.
As shown in (a), when the sag surface 72 of the visual field mask 71 faces the object side, light rays outside the visual field are reflected by the surface sag 72 and enter the image pickup surface of the CCD element 42, resulting in flare. However, if the above-described configuration (shown in FIG. 8B) is used, flare is prevented because rays outside the field of view are less likely to come around the sag surface 48.

The external lead terminal 46 is connected to the wiring board 4
9 is soldered to the wiring board 49, and the electric connector 6
A plurality of signal lines 50 up to are soldered, and the whole is sealed with a synthetic resin 51 such as an epoxy resin. The signal line 50 is adapted to be connected to the video processor 4 via the endoscope 2, the universal cable 7, and the electrical connector 9.

Further, the illumination lens 52 of the illumination optical system 11
Is watertightly bonded and fixed to the tip end main body 37, and the light guide fiber bundle 53 is fixed to the rear of the main body 37 by bonding or screws. The light guide fiber bundle 53 passes through the endoscope 2, the universal cable 7, and the connector 8,
It is adapted to be connected to the light source / air supply / water supply device 3.

As shown in FIG. 9, the suction port forceps outlet 1
A suction and forceps insertion channel tube 54 is connected to 2. This suction and forceps insertion channel tube 5
The coil No. 4 is formed by winding a coil 56, which matches a pitch of the spiral, around a tube 55 having a spiral groove formed in at least a curved pipe portion (not shown). The outer diameter of the tube 55 on the tip side of the suction / forceps insertion channel tube 54 is formed to be thin so as to be about the inner diameter of the coil 56, and the coil 56 forms a tightly wound portion 58 on the outer periphery of the thin portion 57. Then, it is in close contact with the thin portion 57.
The tightly wound portion 58 is fitted in a through hole forming the suction port forceps outlet 12 of the tip end main body 37, and is watertightly adhered and fixed.

When the tip end main body 37 is formed by plastic molding, the tightly wound portion 58 may be inserted and integrally formed.

Alternatively, as shown in FIG. 10, the threaded portion 7 matching the coil pitch of the tightly wound portion 58 on the tip end main body 37.
0 may be provided, and the tightly wound portion 58 may be screwed and bonded.

Further, as shown in FIG.
The thin-walled portion 81 of the tube 55 is formed so as to extend toward the tip end side of the tube 8, and the thin-walled portion 8 is formed on the tip end body 37 together with the tightly wound portion 58.
The extended portion 83 of 1 may be watertightly adhered.

9 to 11, the suction / forceps insertion channel tube 54 to the tip portion main body 37 is constructed.
Therefore, even if an excessive force such as forceps penetration is applied to 54, it is possible to prevent a failure such as the suction and forceps insertion channel tube 54 coming off from the tip end main body 37.

FIG. 12 is a configuration diagram according to the second embodiment of the present invention. As shown in FIG. 12, the exterior 28 of the connector 8 includes a three-way stopcock 93 between the first cap 20 and the second cap 21.
And the gas tube 33 is connected to the remaining one. The three-way stopcock 93 is controlled by the air / water supply button 14, and the three-way stopcock 93 can select either air or gas. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

In the second embodiment, the three-way stopcock 93 alone may be removed for washing. Further, if the connection tube 31 or the three-way stopcock 93 becomes dirty, it is economical to replace it, so that it is economical.

In the second embodiment, switching between air and gas can be done with one touch during the inspection. In addition, at the time of washing, the first base 2
It is advisable to connect the 0 and the second base 21 with the connection tube 31.

[0043]

According to the endoscope of the present invention, it is possible to switch between air supply and gas supply with a simple structure, and since the scope has no air / gas switching mechanism, the scope pipe can be cleaned easily. In addition, since it is a common pipeline for both air and gas, there is an effect that it is possible to save the trouble of cleaning extra pipelines.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an endoscope apparatus according to a first embodiment.

FIG. 2 is a block diagram of an air / water supply pipeline.

FIG. 3 is a sectional view of a main part.

FIG. 4 is a cross-sectional view of a main part in a connection state different from that in FIG.

FIG. 5 is a cross-sectional view of the distal end portion of the endoscope.

FIG. 6 is a detailed view and a sectional view of a CCD.

FIG. 7 is another CCD cross-sectional view.

FIG. 8 is a cross-sectional view for explaining a CCD and a field mask portion.

FIG. 9 is a cross-sectional view of the distal end portion of the endoscope.

FIG. 10 is a cross-sectional view of a distal end portion of an endoscope showing another example.

FIG. 11 is a cross-sectional view of a distal end portion of an endoscope showing another example.

FIG. 12 is a sectional view of a main part according to the second embodiment.

[Explanation of symbols]

 2 ... Endoscope 3 ... Light source / air supply / water supply device 8 ... Connector 19 ... Water supply cap 20 ... First cap 21 ... Second cap 22 ... Air supply source 24 ... Air supply / gas control valve 31 ... Connection Tube 32 ... Gas supply source 33 ... Gas tube 34 ... Stopper

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[Procedure amendment]

[Submission date] August 28, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

The tip 5a is provided with an objective optical system 10, an illumination optical system 11, a suction port forceps outlet 12, and an air / water feeding nozzle 13.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

As shown in FIG. 6B, the CCD 40 is
A CCD element 42 die-bonded to the substrate 41;
Cover glass 4 for protecting the image pickup surface of the CCD element 42
3, and a sealing resin 44 that seals the entire CCD element 42. The substrate 41 and the CCD element 42 are electrically connected by a plurality of bonding wires 45, and further electrically connected to a plurality of external lead terminals 46 provided on the substrate 41.

[Procedure 3]

[Document name to be amended] Statement

[Item name to be corrected] 0040

[Correction method] Change

[Correction content]

FIG. 12 is a configuration diagram according to the second embodiment of the present invention. As shown in FIG. 12, the exterior 28 of the connector 8 includes a three-way stopcock 93 between the first cap 20 and the second cap 21.
And the gas tube 33 is connected to the remaining one. With this three-way stopcock 93, either air or gas can be selected. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Claims] 1. An endoscope having an air supply / water supply pipe for performing air supply or gas supply and water supply, and an air supply / water supply control means, wherein the mouthpiece is detachably connectable to an air supply source. A first mouthpiece that communicates with the control means, and a second mouthpiece that is arranged in the vicinity of the first mouthpiece and that connects an air supply source through the first mouthpiece. Or second
An endoscope characterized in that a gas supply source is connected to the mouthpiece of, or one of them is selectively connected.