JPS5949732A - Endoscope - 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] Relating to an endoscope equipped with a valve.

Generally, an endoscope is provided with a suction switching valve that controls opening and closing of a suction conduit for suctioning mucus and the like in a body cavity. This suction switching valve consists of a cylinder and a piston.
A suction operation is performed by pushing in a piston that is biased in the outward projecting direction by a biasing means such as a spring. Naturally, the lighter the amount of pushing force at this time, the less tiring it will be and the better the operability will be. However, during standby, the surgeon often rests his or her finger on the top of the piston's operation button, and if the pushing force is too small, suction may occur due to an accidental pushing operation. It was dangerous.

In addition to the suction switching valve, the endoscope is also provided with an air/water switching valve for controlling the opening/closing of the air/water supply pipe to perform air/water supply. Conventionally, there are typically two types of air/water supply switching valves. First, the first type is one in which air is supplied by blocking the opening of a leak hole provided in the piston with a finger, and water is supplied by further pushing the piston (for example, see Utility Model Publication No. 48-34fi38). ), and the second type is one in which the piston is pushed in two stages, air is supplied in one stage of pushing operation, and water is supplied in the second stage of pushing operation (Utility Model No. 54-], 54588
(see publication).

The first type not only allows you to rest your finger on the operation button to reduce the force required to start pressing, but also allows you to withstand the air pressure from the leak hole during air supply and prevent the leak hole from being accidentally blocked. It is necessary to place it heavy so that it does not send water.
However, it goes without saying that it is better to push in a lighter weight when pushing in, so it is important not only to make the starting force and amount of pushing from the standby state of the first stage heavier to some extent, but also when pushing in the first stage and supplying air. It is also necessary to have a certain amount of force to start pushing from the standby time in the second stage so as not to inadvertently supply water.

It is considered that the amount of operating force for each switching operation valve should be set from the above viewpoint.

Furthermore, it is necessary to consider whether the relationship between the suction switching valve and the air/water supply switching valve should be set to ensure operability and safety, but there has been no research on these points to date. is.

The present invention has been developed with the above-mentioned points in mind, and its purpose is to make the push-in operation start point of the suction switching valve and the air/water switching valve from the standby state smaller than that of the air/water switching valve. The objective is to provide an endoscope that is safe and has good operability by increasing the size of the endoscope without causing erroneous water supply.

An embodiment of the present invention will be described below based on the drawings.

In Fig. 1, 1 is an endoscope, and 1 is an insertion section 2,
It is composed of an operating section 3 and a light guide cable 4. Inside the endoscope 1, various ducts are incorporated as will be described later. First, the insertion section 2, the operation section, 9
and the air supply pipe 5 extending over the light guide cable 4.
and a water supply pipe 6 are inserted and arranged. Air supply pipe line 5
The tips of the water supply conduit 6 join together and are connected to the air and water supply nozzle 7 provided at the tip of the insertion section 2, and the delivery air and water supply nozzle 7 is provided toward the outer surface of the observation window 8. Then, cleaning water and air are sprayed toward the outer surface of the observation window 8. A connector 9 is provided at the extending end of the light guide cable 4, and this connector 9 has first and second air supply ports communicating with the air supply conduit 5.
A water supply cap 12 communicating with a 0.11 water supply pipe 6 and suction pipes 1 and 9 communicating with a suction pipe described later are provided, respectively. and -G first air supply cap 10
When the connector 9 is attached to a light source device (not shown), it is connected to an air supply 4770 inside the light source device. In addition, a second air supply cap 11 and a water supply cap 12 are provided.
iJ: Connected to the air tube 15 and water tube 16 on the water tank 14 side, respectively. Furthermore, the suction cap 13 is a suction I pump (not shown) K.
It is now connected.

On the other hand, the insertion section 2, the operation section, ? A suction conduit 17 is inserted inside the light guide cable 4 and extends therethrough. This suction conduit 17 is formed using a treatment instrument insertion channel 18 on the distal end side. The distal end of the treatment instrument insertion channel 18 is opened at the distal end surface of the insertion section 2, and the proximal end of the treatment instrument insertion channel 180 is connected to the operating section 3 and opened to the outside.
An insertion opening 19 is formed. Note that a forceps plug 2o is detachably provided in the insertion port 19.

Furthermore, the treatment instrument insertion channel 18 is connected to the proximal end of the suction conduit 17 via a suction switching valve 21. Further, an air/water supply switching valve 22 is inserted between the air supply pipe line 5 and the water supply pipe line 6. The switching valves 27 and 221t are installed on the side surface of the operating section 3 in parallel and close to each other.

The suction switching valve 21 is constructed as shown in FIG. That is, the outer wall body 3a of the operating portion 7 is provided with a hole 23 for attachment. A cylinder 24 serving as a valve seat body is fitted onto the valve seat 'l. The outer end of the cylinder 24 projects outward from the outer wall 3a, and a collar 25 is formed on the outer periphery of the inner end of the cylinder 24, which corresponds to the inner surface of the outer wall 3a. A ring 26 is attached to the outer periphery of the outer end of the cylinder 24 by a screw-in device, and this attachment is achieved by sandwiching the outer wall body 38 between the ring 26 and the collar 25. The cylinder 24 is fixedly attached to the outer wall body 3a. Incidentally, the attachment is such that a ring A-king 27 is fitted between the inner circumferential surface of the hole 23 and the outer circumferential surface of the cylinder 24 to ensure liquid tightness therebetween.

Further, a first connecting pipe 28 is provided at the inner end of the cylinder 24.
A suction source side conduit section 174 of the suction conduit 17 is connected through the suction conduit 17. Further, an opening 29 is formed in the side wall of the cylinder 24 and opens into the cylinder 24.
A nozzle-side conduit section 17b of the suction conduit 17 is connected to this opening 2g via a second connecting pipe 30.

Inside the cylinder 24 is a piston 3 for switching control.
1 is inserted so that it can move up and down.

A hollow hole 92 is formed in the inner end of the piston 31 and extends in the axial direction. It is open to the public.

As shown in FIG. 2, when the piston 3 is in the standby position, this opening 33 protrudes upward from the outer end of the cylinder 24, and is a groove.As will be described later, when the piston 31 is pushed in, That I hole? ,? are arranged to face and communicate with the opening 29 of the cylinder 24.

For the above-mentioned mounting, the ring 26 has a groove 34 formed on its outer peripheral surface for fitting, and its protruding outer end including the groove 34 is mounted as a flange 75. For this attachment, the abutment member 36 is detachably attached to the flange 95.

Each of the abutment members 36 is a metal outer cylinder portion, 96
a and the inner cylinder part? 6b are arranged concentrically, and both cylindrical parts 3fi, , ? Connecting river bottom wall between one end of b? 6 c is integrally formed and connected, and the outer cylinder part, ? A rubber member 37 formed in a substantially cylindrical shape is integrally connected to the rubber member 6g. That is, the rubber member 37 is integrally attached and fixed to the outer cylindrical portion 96a of the abutting member 36 by in-line molding. Furthermore, the rubber member 3
At one end of 7, an engaging protrusion 98 is formed which elastically and tightly fits into the groove 94 of the flange 35. An abutting portion 39 projecting radially inward is integrally formed at the outer end of the portion 36b.The abutting portion 39 is in contact with the upper end step portion 4) of the piston 31 in the standby position. ,
The position is regulated during standby.

On the other hand, the upper end of the piston 31 has a male thread. 1
This male thread, q 1 a I/C, is formed at one end of the connecting pipe 42, and a female thread 42c is screwed and fixed thereto. Furthermore, an operation button 43 made of relatively hard plastic is fitted onto the outer end of the connecting tube 42.

Further, the peripheral edge of the operation button 430 is formed as a falling cylindrical wall portion 44, and this wall portion 44 enters into the rubber member 37 when the piston 31 is pushed in.
It comes into contact with the upper surface of the inner edge protrusion 3711.

Further, the outer end peripheral edge of the connecting pipe 42 and the abutting member 3
The bottom wall of 6? A coil spring 45 as a biasing member is interposed between the screws 6c and 6c and located around the screws 3 and 6c. First, - the binuton 31 is urged outward and is placed on standby at a position where the upper end step 4 of the piston 31 abuts the abutting portion 39.

Moreover, the inner cylinder part of the abutting member 36, ? A plurality of leak holes 46 are formed in the wall of the piston 6b, and communicate with the opening 33 of the piston 7 when the piston 31 is on standby.

In order to prevent the rotation of the piston 91, a guide bin 47 is provided on the side wall of the cylinder 24 and protrudes from the inner wall surface thereof. A vertical groove 4B is formed along the axial direction, and the guide pin 47 is engaged with this vertical groove 48.

Therefore, when the suction switching valve 2 is on standby, the cylinder 24 is opened at N2 as shown in FIG. ? f-J,
It is closed by the circumferential surface of the piston 310. Therefore, the suction conduit 17 is blocked in the middle, and the suction action toward the treatment instrument insertion channel 18 side does not work. But the piston? 1 hollow hole 32. It communicates with the outside through the aperture 33 and the leak hole 46 of the abutment member 36, so that outside air is sucked in. Therefore, when performing a suction operation, a finger is placed on the operation button 43 and the piston 11 is pushed in at 1, where the wall portion 44 touches the inner edge protrusion 37a. As a result, the piston 310 opening 93 faces and communicates with the opening 29 of the cylinder 24, and the suction conduit 17 is opened through this.

However, it is cut off from the outside. Therefore, suction is performed through the suction conduit 17 while preventing the suction of outside air.

Next, the air/water supply switching valve 22 will be explained. The configuration of this is shown in FIG. That is, the cylinder 50
and a piston 51, and the cylinder 50 has a substantially bottomed cylindrical shape with a lower opening closed by a bottom cover 52.

Further, the upper outer end of the cylinder 50 is connected to the outer wall 3 of the operating section 3.
The mounting hole drilled in a is inserted into the hole 56, and a ring 57 is screwed into the part that protrudes from the hole 56, and the cylinder 40 is mounted on the outer wall 3a. It is designed to be fixed. Further, the inside of the cylinder 50 is formed as a large diameter cylindrical part 58 on the open end side and a small diameter cylindrical part 59 on the bottom cover 52 side, and a chi yP part 60 is formed at the boundary between these parts. An escape groove 6 is formed in the inner circumferential wall of the small diameter cylindrical portion 59 near the bottom cover 52 .

In this part, an upstream pipe section 6a of the water supply pipe 6 is provided.
is connected. The downstream pipe section 6IL of the water supply pipe 6 is still in the small diameter cylinder part 59 above the relief groove 6.
Furthermore, above this, an upstream pipe line section 5 of the air supply pipe line 5 is provided.
a is connected. In fact, the downstream pipe section 56 of the air supply pipe 5 is connected to the wall of the large-diameter cylinder section 58 .

The piston 5 is fitted into the cylinder 50 configured in this manner. This piston 51 is a cylinder 500
A first shaft portion 62 with a large diameter corresponding to the large diameter cylinder portion 5H and a second shaft portion 63 with a small diameter corresponding to the small diameter cylinder portion 59. A rut leak hole 64 is formed along the entire length of the first shaft portion 62 side. In addition,
This leak hole 64 is connected to a connecting pipe 67 and an operation button 7, which will be described later.
It is also formed in the hole and opens to the outside. Further, an opening 65 communicating with the leak hole 64 is formed in the side wall of the second shaft portion 63 . Further, a female thread 66 is formed at the outer end of the piston 5, and a male thread 68 formed at the outer periphery of one end of the connecting tube 67 is screwed into the female thread 66. A collar 69 is integrally formed at the other end of the connecting tube 67, and an operation button 71 made of relatively hard plastic rubber is fitted into the collar 69. In short, the periphery of this operation button 71 is formed as a cylindrical wall portion 72 that falls down.

On the other hand, the ring 57 of the air/water supply switching valve 22 has a groove 73 for fitting formed on its outer circumferential surface, just like the ring 26, and the protrusion of the ring 57 including this groove 73. The ends are attached with flanges 74. and,
This installation is done on flange 74. A butting member 75 is removably attached to. This abutment member 75 is constructed in exactly the same manner as the abutment member 3G of the air/water supply switching valve 22. That is, the outer cylindrical part 75a and the inner cylindrical part 7.5b, which are made of metal, are arranged concentrically to form the two cylindrical parts 75n.
, 75b are integrally connected to each other by a bottom wall portion 75c. A cylindrical rubber member 76 is connected to the outer cylinder portion 75a. The claw υ, this gono member 76, is in ν 17 against the outer cylindrical portion 75a of the abutting member 75.
Furthermore, the lower end of the rubber member 76 has an engaging protrusion 78 that elastically and tightly fits into the groove 73 of the franchise 4. Also, the lower end surface 75d of the inner cylindrical portion 75b of the abutment member 75 is f'l; as shown in FIG. The position is regulated by applying the outer end of 62.

1. A coil spring 77, which is exactly the same as the coil spring 45 of the suction switching valve 2, is interposed between the outer end periphery of the connecting pipe 67 and the bottom wall portion 75e of the abutment member 75 as a biasing member. , and the second piston 5) is directed outward.

Further, a first mounting groove 8 is formed in the first shaft portion 62 of the piston 5, and a first sealing member as an abutting member is formed in this groove by an elastic material such as silicone rubber. 82 is attached. This first sealing member 82 is
The large diameter cylindrical portion 58 of the cylinder 50 and the first portion of the piston 5
This maintains the airtightness of the air passage 83 formed by the shaft portion 62.

It's the first shaft part 62 and second shaft part 63 of the piston 51.
A second mounting groove 84 is formed at the boundary with the second mounting groove 84, and a valve body 85 made of an elastic body is mounted here. This valve body 85 is attached to a base portion 86 that fits into the groove 84 and extends diagonally upward from the base portion 86 and has a tip portion attached to a large diameter cylindrical portion.
8 and a flexible portion 87 that comes into contact with the inner circumferential surface of 8.

The base portion 86 is provided with a slope 88 that comes into close contact with the tapered portion 60 formed at the boundary between the large-diameter cylindrical portion 58 and the small-diameter cylindrical portion 59 of the cylinder 50 when the piston 51 is pushed in as shown in FIG. The flexible portion 87 is connected to the air supply path 8.
3, the flow direction of the gas is one direction, that is, the valve body 85
It is restricted only in the direction from the lower side to the H side.

Further, a third mounting groove 89 is formed at the lower end of the second shaft portion 63 of the piston 5, and a second sealing member 90 is mounted therein. In this third attachment, the groove 89 is connected to a pair of side grooves 9-1 spaced apart in the vertical direction of the second shaft portion 63.
, 97, and an intermediate groove 92 shallower than the side grooves 91.91 formed between these side grooves 91.91.

The second sealing member 90 also includes a pair of projecting portions 93.93 that fit into the pair of side grooves 91°91 and come into close contact with the inner surface of the small diameter cylindrical portion 59 of the cylinder 50, and a thin wall portion corresponding to the intermediate groove 92. A communication passage 95 is formed between the thin wall portion 94 and the inner peripheral surface of the small diameter cylindrical portion 59 .

This communication passage 95 allows the upstream side pipe section 6a and the downstream side pipe section 6b of the water supply pipe line 6 to communicate with each other when the piston 5 is pushed in as shown in Fig. 4. . Further, the aperture 65 of the piston 51 allows the above-mentioned air to be supplied in both the standby state where the piston 51 is urged outward as shown in FIG. 3 and the operating state where the piston 51 is pushed in as shown in FIG. It has a width such that it communicates with the upstream pipe section 5 of the utility pipe 5.

Next, the operation of the air/water supply switching valve 22 having the above configuration will be explained. When the air supply unit is operated in a standby state without any contact, the gas sent to the upstream pipe section 5a of the air supply pipe 5 passes through the opening 65 and the leak hole 64, and the gas passes through the hole 65 and the leak hole 64.
It may also be dissipated into the atmosphere. At this time, the gas tries to flow from the air supply path 83 to the downstream side pipe section 5b of the air supply pipe 5, but the flow path resistance here is greater than the flow path resistance flowing from the leak hole 64 to the atmosphere. It's thick, so it won't flow this way. When air is to be supplied into the body cavity, the user places his or her finger on the operation button 7 to close the open end of the leak hole 64. Then, the gas released from the leak hole 64 flows into the air supply path 83, elastically deforms the flexible portion 87 of the valve body 85, and flows into the downstream side pipe section 5b of the air supply pipe 5. Therefore, the gas from the air pump flows out from the air/water supply nozzle 7 of the insertion section 2.

On the other hand, when feeding liquid, as shown in FIG.
Push it in with a knife that is in contact with the tapered part 6θ of 0. Then, the upstream pipe line section 5 of the air supply pipe line 5, which had been in communication until then,
a and the downstream pipe section 5b are connected to the slope 88 and the Teno base section 6.
0, the gas discharged from the air pump flows into the pressurizing air tube 15 and pressurizes the inside of the water tank 14.

Therefore, water flows from the water tank 14 to the water supply pipe 6.

By the way, -] In the configuration described above, the wall members 36 and 75 of the suction switching valve 2 and the air/water switching valve 22 are exactly the same, and the coil spring 4 used as a guard
'5.77 also uses exactly the same thing. However, the installed lengths of the coil springs 45 and 77 are set shorter for the air/water supply switching valve 22. For this reason, the air/water supply switching valve 2
2, the pushing operation force and the twisting force at the start of the operation are larger for the air/water supply switching valve 22. There is a difference in the ability to start operating from standby (equipment ability during standby). The amount of operating force during the pushing operation is the same.

For example, the suction switching valve 21 is equipped with 400 g of force, the air/water supply switching valve 22 is equipped with 550 g, and the operating force at the end of pushing is 700 g for both.

The reason for this setting is as follows. That is, the suction switching valve 21 and the water supply switching valve 22 are provided side by side in the operating section 3. In general, how these are operated depends on the surgeon, depending on the size of the surgeon's hands, the length of his fingers, and how he operates the angle knob with his left hand.
There are two ways to do this, depending on your other preferences: The first method is to operate both switching valves 21 and 22 with the index finger of the left hand. In this case, the middle finger does not touch the operation buttons 43 and 71, and the index finger normally touches the operation buttons 4 and 71. , 77, and let it rest. The second method is to operate the suction switching valve 21 with your index finger and the air/water supply switching valve 22 with your middle finger.In this case, you usually use your index finger to press the operation button 4 of the suction switching valve 2. ? Place your middle finger on the operation button 71 of the air/water switching valve 22 and rest it.

These two methods are often specified by the operator, and include operating the angle with the left hand, rotating the operating part 3, holding the upper part of the operating part 3, and holding the lower part. The operation method changes from moment to moment depending on what you do. Moreover, since the operator focuses on fixing his eyes on the eyepiece and staring at the observation image, until now he has only used his index finger to press which operation button 43.
It is not possible to judge whether it was above 71 by looking at it. Under such circumstances, as described above, it is necessary to set the operation start force to be different from the standby state in order to operate accurately and safely.

However, regarding the relationship between the magnitude of the force required to start the operation from the standby state, it is conceivable that the suction switching valve 21 is lighter, or conversely, the air/water switching valve 22 is lighter, or they are the same. If they are the same, the operator can basically rest his or her finger on either operation button 43°71 with the same force. However, when suctioning, it is sufficient to push in with a sufficiently large force, but when blowing air, the leak hole 64 must be blocked with a force stronger than the force of placing a finger on it and withstanding the leaking air pressure. . Moreover, the operation button 71 must not be pushed in at that time. However, it is better for the operator to rest his/her fingers on both operation buttons 43°7 with the same pressure and rest them, so it is easier for the surgeon to apply too much pressure when pumping air and accidentally pump water. There is a risk that you may end up doing this.

Next, it is clear that if the operation button 7 of the air/water supply switching valve 22 is made lighter, it will be more difficult to use than in the same case.

Therefore, if the air/water supply switching valve 22 is made heavier as in the present invention, the operator can select which operation button 4 ;?
, 71 can be rested in the same way, and it is also a little safer to avoid accidentally supplying water when supplying air. In addition, since it is necessary to push with a considerable amount of force in order to perform a suction operation, there is no possibility of accidentally suctioning during air or water supply.

In the above embodiment, the rubber members 37, 76 of the abutment members 36 and 75 are attached to each of the switching valves 21 and 22, and the rings 26 and 57 are attached by removing the abutment members from the flanges 35 and 74, respectively. 6, 75, the piston, 91, 51, coil spring 45.77 and connecting pipe 42.67 can be removed at the same time. Also, connect the connecting pipe 42.67 to the piston;? By loosening and removing the screws from 1 and 5 J, each of the above members can be separated into individual parts.

Therefore, cleaning is easy. In addition, each switching valve 21
．． In 22, connecting pipe 42.67 Togistone, 91, 51
The screw connection method is the opposite of the recommended one, so it is easy to tell the difference when assembling.

Abutment member at each switching valve 21.22, q e
, 7s (including the rubber members 37 and 76) and the coil springs 45 and 77 have exactly the same configuration and are made common. Therefore, even if it is disassembled and cleaned, there will be no inconvenience such as putting it on by mistake and having to reinstall it.

Furthermore, since the same coil springs 45 and 77 are used, the amount of operating force during the pushing operation is the same. Therefore, for example, when performing water supply and suction at the same time in order to powerfully clean the observation window, that is, when pressing the suction operation button 43 with the index finger and pushing the air and water supply operation button 71 with the middle finger, both fingers are pressed. It is better to have the same amount of operating ability.

Also, the rubber members 37 and 76 of the abutment members 36 and 75 can be attached and detached from the flanges 35 and 74 with a single touch, but especially at the engaging edges of the rubber members 37 and 76, ? 8.
Since the inner surface of 78 is tapered, it is easy to attach. The pistons 37, 51 and the abutting portions of the abutting members 36.degree. 75 are both made of metal, so when they abut, there is a 1.degree. sound of metal hitting each other, providing a good operating feel.

That's a shame, butt part I'436.75 and piston, 71°5
A blank note abutting member 16 that fits together with the first side
．． 75 When pressed from a multi-position position, it becomes eccentric or tilts/stiffness.

On the other hand, when the piston 31 is pushed halfway during a suction operation, although the suction conduit 17 is in communication, the leak path is blocked only by the mechanical engagement between the cylinder 24 and the piston 9, resulting in the state 7. 1. Press at the last inch. When pushed in, the tip of the wall portion 44 of the operation button 43 touches the rubber member 37 of the abutment member 36, and at this time the leak path is completely blocked. For this reason, the amount of suction can be controlled by selecting a point midway through the process.Furthermore, the leak path and the suction conduit 17 momentarily communicate with each other during the return of the piston 31. Therefore, if you suction the mucous wall and it freezes, even if you pull out the endoscope, the piston 31
The viscous wall will be released from the suction port during the return, and the viscous wall will not be damaged.

By the way, suction? If the operation part 3 is immersed in a disinfectant solution with the piston 31 attached while operating the pump, the disinfectant solution flows inside the abutment member 36 and can be disinfected.

The outer peripheral portion of the bent abutting member 36.75 is a rubber member 37.
, 75, and the operation buttons 43° and 71 are made of plastic, so the operator will not get burned if they touch them during high frequency treatment.

However, accessories for cleaning the pipes, such as a cleaning device, can be attached to the flange 35.74. When cleaning the pipes, the abutment members 36, 75, etc. are both pistons and ? 1, 51 from the cylinder 24.50.

In addition to the switching valves 21 and 22, some endoscopes are equipped with an operation button for gas supply.

However, the appropriate amount of pushing force for this operation button differs depending on its installation position.

If you can rest your finger on the operation button, the same as the operation button for suction is suitable, and if you can't, it would be better to make it lighter.

As explained above, in the present invention, the force required to start operating the operation buttons of the suction switching valve and the air/water switching valve from a standby state is greater than that of the air/water switching valve.

Therefore, there are many unforeseen accidents that occur when operating each button, and the operator can rest his or her fingers on either button in the same way. In other words, it is easy to operate and ensures safety.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic diagram of the entire endoscope, Fig. 2 is a side cross-sectional view of the suction switching valve when it is on standby, and Fig. 3 is a diagram showing air and water supply. FIG. 4 is a side sectional view of the switching valve when it is on standby, and FIG. 4 is a side sectional view of the air/water switching valve when it is pushed in. DESCRIPTION OF SYMBOLS 1... Endoscope, 5... Air supply conduit, 6... Water supply conduit, 17... Suction conduit, 21... Suction switching valve, 22... Air supply Water supply switching valve, 24... cylinder,
3...Piston, 45...Coil spring, 5o...
・Cylinder, 5... Piston, 64... Leak hole,
71...Operation button. Applicant's representative Patent attorney Takehiko Suzue No. 1vlJ Figure 2 Showa year, month, day, Japan Patent Office Commissioner Kazuo Wakasugi 1, Indication of the case Patent application No. 160366/1983 2, Title of the invention: Endoscope 3, Ichiichi Relationship with the case of the person who filed the patent application Patent applicant (037) Olympus Optical Industry Co., Ltd. 4, Agent 6, Supplement 1 to Karizo specification 7, contents of amendment (1) Specification 1, page 20, line 7, “ It will be the same." wo "
We are also the same. ”. (2) Next to "There is..." on the third line from the bottom of page 22, press F, for example, operation button 4, ? , 71, the operator can rest his or her fingers at any strength of 40051 or below. However, on the other hand, the operator is tightly grasping the operation part 3 of the endoscope 1 with the ring finger and little finger of the left hand, so the operator is holding the operation part 3 of the endoscope 1 tightly with the ring finger and little finger of the left hand. Since force is applied to the operation button 43 or 71, apply a relatively strong force within the range that does not push the operation button 43 or 71.
For example, try placing your finger on a piece weighing less than 350 g (the second situation will occur in many cases.On the other hand, when supplying air, you will be conscious of having to close the hole, and you will have the strength to keep your finger rested at all times. (For example, 350g) plus alpha (for example, 150p), that is, it is easy to press operation button 7 at 500g and send water by mistake.'' (3) 23rd line, 7th line In the 9th line of the eyes,
Moreover, there is no need to perform a suction operation. ” to be deleted. (4) No. 24 nail, line 10 to line 17 of the same mouth. ``Also, the same coil spring... has good operability.'' is changed to ``Also, the operating force t' when pressing operation buttons 4, ?, 71 is the same, so the analogy is based on observation. In order to powerfully clean the window 8, when performing water supply and suction at the same time, that is, when pressing operation button 43 for suction with the index finger and pressing operation button 7 for air and water supply with the middle finger, the operation force of both fingers is required. It has the same characteristics and is easy to operate.''C near pressure. (5) From the 11th line of the same page to the 4th line from the bottom of the same page, change "Therefore, the old... Not only can it be placed on top to rest, but there is also no chance of accidentally supplying water when supplying air. In other words,
It is easy to operate and ensures safety. Correct to J.

Claims (2)

[Claims] (1) The operation section includes a suction switching valve that performs a suction operation by pressing and operating an operation button, and a leak hole is opened at the protruding end of the operation button, and air supply operation is performed by blocking this leak hole with a finger. In an endoscope equipped with an air/water supply switching valve that performs water supply operation by pushing the air/water switching valve operation button, the force to start pushing the air/water switching valve operation button from the standby state to the suction switching valve operation button An endoscope characterized in that the force is set to be greater than the force required to start a pushing operation from a standby state. (2) The endoscope according to claim 1, characterized in that the amount of force (=J) in the return direction when each operation button in both the switching valves is pressed is approximately equal.