JP2550321Y2 - Fluid control device for endoscope - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application field] The present invention relates to air supply, water supply,
The present invention relates to an improvement in a fluid control device for an endoscope for performing suction or reflux.

[0002]

2. Description of the Related Art Generally, an endoscope is provided with a fluid conduit for air supply, water supply and suction. And the air supply line and the water supply line join at the distal end side of the insertion portion of the endoscope,
It communicates with a nozzle that opens toward an observation window provided at the distal end. For this reason, when the observation window is contaminated with mucus or dirt in the body cavity, the nozzle is configured to remove dirt by sending water and air from the nozzle toward the observation window.

[0003] In addition, since organs in the body cavity such as the stomach wall have a self-contracting habit, in order to facilitate endoscopic observation, constant insufflation is performed continuously through an air supply duct to inflate the inner wall of the body cavity for observation. doing. However, an accident such as a change in the inner wall of the body cavity due to excessive air supply or damage to the inner wall of the body cavity may occur. Therefore, Japanese Patent Application Laid-Open No. 64-22243,
Japanese Patent Application Laid-Open No. Sho 64-22244 discloses an endoscope which can always maintain a constant intra-cavity pressure so as not to cause the above-mentioned disadvantage and excessive decompression due to a suction operation performed to prevent over-inflation. Fluid control devices have been proposed.

[0004] In addition, there are portions to which endoscopy is applied, such as portions having relatively thick body walls and extremely thin portions such as membranes. Regardless of such a difference in body cavity tissue, the air pressure, the water pressure, the suction pressure, and the like are set to be constant. The pressure is set relatively low to ensure safety, i.e., to prevent rupture of body cavities and mucous membrane adsorption, in very thin areas of the body wall. But,
With such a low setting, when examining a thick part of the body wall, even if air is supplied to secure the visual field, the inside of the body cavity does not easily expand, and even if the supplied air is suctioned at the end of the examination I couldn't get enough suction, and the examination time was prolonged.

On the other hand, various types of endoscopes are prepared according to the application site of the subject to be observed, and the endoscope diameter, the optical system, the inner diameter of the pipe, the length of the pipe, and the like are different from each other. ing.

[0006]

As described above, various types of endoscopes having different insertion site diameters, optical systems, pipe inner diameters, and pipe lengths are available. However, the conventional fluid control device for endoscopes is controlled so that excessive pressurization and decompression do not occur, but it is effective only for a specific model, and is compatible with multiple types of endoscopes. There is a drawback that you can not. That is, when the pipe diameter, the pipe length, and the like of the endoscope change, the pressure such as the air pressure, the water pressure, or the suction pressure changes, so that a predetermined pressure cannot be obtained. Also,
It is also necessary to change the set pressure according to the application site of the subject to which the endoscope is applied. In other words, if the set pressure is too high, rupture of the body cavity, mucous membrane adsorption and the like are likely to occur, which is dangerous.

[0007] The present invention has been made in view of the above-mentioned points, and is always performed at an optimum set pressure regardless of a difference in a pipe diameter, a pipe length of an endoscope, or a portion to be inspected. It is an object of the present invention to provide a fluid control device for an endoscope which can perform endoscope observation and inspection and does not prolong the inspection time safely and unnecessarily.

[0008]

The fluid control apparatus for an endoscope according to the present invention has a means for identifying a model and a pipe for air supply, liquid supply, suction or reflux.
The endoscope having at least one is controlled by the conduit.
In the fluid control device for an endoscope for performing control, by the identification means of the endoscope, a detection means for detecting the model, the tube
Pressure adjusting means for adjusting the operating pressure of the fluid in the road, and pressure switching means for switching the operating pressure of the pressure adjusting means according to the type of the endoscope detected by the detecting means. It is characterized by.

[0009]

With this configuration, the detecting means detects the model of the endoscope by the identifying means of the endoscope, and the pressure switching means sets the operating pressure of the pressure adjusting means in accordance with the detected model of the endoscope. Switch.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 relate to a first embodiment of the present invention. FIG. 1 is an overall configuration diagram of an endoscope and a pipeline system and a control system of a fluid control for the endoscope, and FIG. 2 is a diagram of the apparatus shown in FIG. Overall appearance,
FIG. 3 is a timing chart of air supply, water supply, suction, and reflux, FIG. 4 is a timing chart of air supply, intake, and reflux stop after water supply, and FIG. 5 is a schematic configuration diagram of a control unit and a code storage unit. It is.

As shown in FIG. 2, an endoscope 1 is an electronic endoscope as an example to which the fluid control device for an endoscope of the present embodiment is applied. The endoscope 1 has an operating portion 2 also serving as a grip portion on the hand side, and extends an elongated flexible insertion portion 3 provided with a distal end component portion and a curved portion in front of the operating portion 2. Has been established. A flexible universal cord 4 extends laterally from the operation unit 2. The endoscope 1 is connected via a connector 5 provided at the end of the universal cord 4 to, for example, a video processor 6 having a light source device and a fluid control device for an endoscope. . The video processor 6 has a signal processing circuit for performing signal processing on an image pickup signal from the endoscope 1, and transmits the image signal to a connected monitor 7 to display an image. The video processor 6 also has a function as a fluid control device for an endoscope, has a gas supply pump described later therein, and communicates with the water supply tank via the gas supply pump and a pipe described later. 8, a suction tube 9 is attached to a circulation suction bottle 9 and a pipeline communicating with a suction pump described later. Note that the operation unit 2 is provided with a switch 65 for stopping reflux, which will be described later. In addition, the endoscope to which the present invention is applied is not limited to the electronic endoscope, but is also applicable to an optical endoscope such as a fiber.

Meanwhile, as shown in conduit of FIG. 1, the video processor 6 as an endoscope fluid control device, both are internally provided with air supply pump 18 is a source of pressurized air, feeding
The water supply tank 8 communicated with the air pump 18 via a pipe described later is provided outside. This air supply pump 18 has
A first air line 22 is connected, and the first air line 22
Is provided with a first solenoid valve (V1) 23, and the first solenoid valve 23 is connected to a second air supply pipe 24. Further, a water supply pressurizing line 25 is branched and connected in the middle of the first air supply line 22. The water supply pressurizing line 25 is connected to a space above the liquid storage surface in the water supply tank 8. Have been. The first water supply line 26 is connected to the water supply tank 8 in a state where the suction port is immersed in the water storage solution, and the second water supply line 26 is connected to the second water supply line 26.
The second water supply line 28 is provided with a solenoid valve (V2) 27
Is connected. A recirculation air supply line 30 is branched and connected to the second air supply line 24, and a third solenoid valve (V3) is provided.
It is connected to the suction bin 9 for recirculation via 29. Joints 31 and 32 are attached to the ends of the second air supply line 24 and the second water supply line 28, respectively, and the endoscope-side air supply line 33 and the water supply line 34 are respectively connected to the endoscope side. It is designed to be detachably connected. And this air supply line 3
The 3 and the water supply conduit 34 communicate with nozzles 35 and 36, respectively, which open toward observation windows (not shown) at the end of the endoscope.

Further, a gas tank 5 in which non-combustible gas is stored
1 is connected to a first gas line 52 and to a second gas supply line 24 via a seventh solenoid valve (V7) 53. On the other hand, the first suction line 3 is connected to the suction pump 21.
7, the first suction line 37 is connected to the suction bin 20.
Connected to Further, the suction bottle 20
A second suction line 38 constituted by the pull tube 10 is connected. Further, a third suction pipe 40 is connected to the second suction pipe 38 via a fourth solenoid valve (V4) 39. A joint 41 is attached to an end of the third suction pipe 40, and is detachably connected to a suction pipe 42 on the endoscope side. And the second
The suction line 38 is provided with a fifth solenoid valve (V5)
43 is branched from the leakage pipe 57 interposed therebetween .
I 'm communicating with my mind .

A return suction line 44 branches off from the third suction line 40 from the middle thereof. The return suction line 44 has a sixth solenoid valve (V6) 45 A recirculation roller pump (hereinafter referred to as a recirculation pump) 13 is interposed, and the recirculation suction bottle 9 is provided on the discharge side of the pump 13.
However, a pressure sensor 58 is connected to the suction side via the sixth solenoid valve (V6) 45.

The first air supply line 22 and the first suction line 37 are branched and connected to pressure adjusting lines 59 and 60, respectively. The auxiliary air supply pump 6 is
1 and a pressure sensor 62 are connected, and an auxiliary suction pump 63 and a pressure sensor 64 are connected to the pressure adjusting pipeline 60.

The reflux pump 13 includes an auxiliary air supply pump 61, an auxiliary suction pump 63, and pressure sensors 58, 62, and 6.
4 are electrically connected to the control unit 46, respectively. The control circuit 46 electrically connects the first to seventh solenoid valves 23, 27, 29, 39, 43, 45, 53 to control the opening and closing of the valves. Further, the control circuit 46 controls a switch (SW) of the endoscope 1.
1) 47, (SW2) 48, (SW4) 49, (SW
8) 65, and switches (SW3) 50, (SW5) 54, and (SW6) 5 provided on the exterior of the video processor 6.
5, (SW7) 56, (SW9) 71, (SW10) 7
2 are connected. Further, the control unit 46 controls the endoscope 1
Is connected to a code storage unit 66 as a means to be identified.

As shown in FIG. 5, the code storage 66
Is a RO that stores a model-specific code of the endoscope.
M67 and a shift register 68 for converting parallel data output from the ROM 67 into a serial signal. On the other hand, the control unit 46 of the video processor 6 includes a decoder 69 as detection means for determining serial data transmitted from the shift register 68 of the endoscope 1 and a pressure value indicated by each of the pressure sensors 58, 62, and 64. A pressure control unit 70 as pressure switching means for monitoring and switching the respective pumps as pressure adjustment means to preset pressures in accordance with data (models) read by the decoder 69; A clock 88 for controlling the read timing of the ROM 67 and the shift register 68 of the mirror 1, and an air supply / water supply / suction control for opening / closing each electromagnetic valve according to the setting of each switch and controlling air supply / water supply / suction / recirculation. And a unit 89.

In this configuration, when the connector 5 of the endoscope 1 is inserted into the video processor 6, R
The data stored in the OM 67 is stored in the shift register 68.
, And is input to the decoder 69. Then, the decoder 69 reads the model of the attached endoscope 1 from the transmitted serial data, and the pressure control unit 70 determines the application site of the attached endoscope 1 based on a signal output from the decoder 69. In order to make the initial setting air pressure for each part and the initial setting suction pressure for each part (shown in FIG. 3) suitable for the pipe inner diameter and the pipe length,
Then, the auxiliary suction pump 63 is adjusted to be ready for inspection. Similarly, the pressure control unit 70 controls the recirculation pump 1
3 can be set to the initial set recirculation pressure suitable for the endoscope model. That is, in this embodiment, according to the model of the endoscope,
The optimal initial pressure can be set, and air, water, suction, and reflux can be safely performed without using unnecessary time.

Next, control of air supply, water supply, intake, reflux suction, reflux water supply, and reflux gas supply will be described below in order with reference to the time chart of FIG. As shown in the time chart of FIG. 3, the air supply and the water supply during the normal endoscopic inspection are performed by a switch 47 provided on the operation unit 2 and a switch (SW1) 4.
7 by 0N, OFF. That is, in the case of air supply, when the switch (SW1) 47 is set to 0N, the first electromagnetic valve 23 is opened by the control unit 46 and the air supply line 3 is opened.
Insufflation takes place via 3. On the other hand, the water is sent by turning on the switch (SW2) 48N, the control unit 46 similarly opens the second solenoid valve 27, and the washing water is sent to the water feeding pipeline 34.

Next, suction is performed by turning off a switch (SW4) 49 provided on the operation unit 2 by 0N. That is, when the switch (SW4) 49 is set to 0N, the control unit 46 switches the fifth electromagnetic valve 43 from the normal standby state in which only the fifth electromagnetic valve 43 is open in conjunction with the switch 49. The suction is performed with the fourth solenoid valve 39 closed and the fourth solenoid valve 39 opened.

Further, the reflux is performed as follows. Set the switch (SW3) 50 for switching the operation and stop of the reflux to 0
When N is set, the sixth solenoid valve 45 and the third solenoid valve 29 are opened, the return pump 13 is operated, and the fluid and the like in the body cavity are sucked through the suction line 42, the third suction line 40, and the return line. The fluid sucked through the suction line 44 and flowing into the reflux suction bottle 9 separates a liquid such as a mucous membrane and air here, and only the air is returned to the reflux air supply line 30 and the second air supply line 24. Then, air is supplied from the nozzle 35 (the same amount as the suction amount) via the air supply line 33. When the switch 50 is turned off, the reflux pump 13 stops, and the third solenoid valve 29,
The sixth solenoid valve 45 closes and stops.

Next, suction, water supply, and gas supply during reflux will be described. First, when suction is performed during reflux, the switch (SW5) 54 is set to 0N and the switch 49N is set to 0N.
At this time (during suction), the control state is switched from the control state in which the reflux is not stopped to the control state in which the reflux is stopped. And the switch (SW
5) With the switch 54 in the 0N state, the switch (SW3) for further switching the reflux operation is set to 0N, and the third and sixth solenoid valves 2
In a state in which the reflux pump 13 is operating with the opening 9 and 45,
When the switch 49 (SW4) for performing suction is set to 0N, the fifth solenoid valve 43 is closed, the fourth solenoid valve 39 is opened, and suction is started. At the same time, the third and sixth solenoid valves 29 and 45 are opened, and the reflux pump 13 stops. When the switch (SW4) 49 is turned off, the fifth solenoid valve 43 is opened, the fourth solenoid valve 39 is closed to stop suction, and the third and sixth solenoid valves 29 and 45 are opened. Then, the reflux pump 13 operates to return to the reflux operation.

Next, water supply during reflux will be described. As in the present embodiment, the air supply nozzle 35 and the water supply nozzle 36
In the type of endoscope provided separately, when water is supplied during the return air supply, since the air is constantly ejected from the air supply nozzle 35, the supplied water is blown off and an observation window (not shown) is provided. The inconvenience that the lens surface cannot be cleaned occurs. Therefore, the present device is provided with a recirculation intake line 4 only for water supply.
4 is closed so that no air is supplied. In order to supply water during the reflux, the switch (SW6) 55 for stopping the reflux air supply during the water supply is turned ON, and the switch (SW3) 5 is turned off.
0 is in the 0N state, that is, the third and sixth solenoid valves 29 and 45 are open, the recirculation pump 13 is operating, and the switch (SW
2) When 48 is set to 0N, the second solenoid valve 27 is opened and water is supplied. At the same time, the third solenoid valve 29 is closed, and the air supply by the recirculation is stopped. The switch (SW
2) When 48 is turned off, the second solenoid valve 27 is closed, the third solenoid valve 29 is opened, the water supply is stopped, and the recirculation air supply is restarted. In the present apparatus, by performing the control, the observation window can be reliably washed even if water is supplied during the reflux.

Next, a case in which gas is sent during reflux will be described. In the present embodiment, in order to increase the gas concentration in a short time, control is performed such that reflux is automatically stopped when gas is sent. In order to perform gas sending during recirculation, first, an air / gas switching switch (SW7) 56 is set to 0N, the seventh solenoid valve 53 is opened, and at the same time as gas is sent, the third and third gas valves are opened. The solenoid valves 29 and 45 of No. 6 are closed, and the recirculation pump 13 stops. In this state, the switch (S
W1) When 47N is set to 0N, the seventh solenoid valve 53 is opened, and gas is supplied. And a switch (SW1) 4
When 7 is turned off, only the seventh solenoid valve 53 is closed,
Stop the gas supply and maintain the closed state. Further, in order to perform reflux again, the reflux is restarted by setting the reflux switch (SW3) 50 to 0N again. By performing such control, even if gas is sent, the gas does not become thin due to reflux and is safe.

Hereinafter, with reference to the time chart of FIG. 4, the recirculation stop, air supply after water supply, and suction operation will be described. First, in order to avoid danger when mucosal adsorption occurs during reflux, manual suspension of reflux will be described. When the mucous membrane is adsorbed during the reflux (SW3 is 0N), when the switch (SW8) 65 provided on the operation unit 2 is pressed, the reflux pump 13 is stopped instantaneously, and the third solenoid valve 29 is turned off. When closed, the backflow from the nozzle 36 is prevented, the recirculation pump 13 is reversed for a few seconds, and the air in the recirculation suction bin 9 is sent to the suction line 42 to remove the adsorbate, and then the recirculation pump 13 stops. I do. When resuming reflux,
The switch (SW8) 65 is turned ON again. In the present embodiment, since the switch (SW8) 65 for stopping the reflux is provided in the operation unit 2, the switch can be pressed immediately, which is safe.

In this embodiment, when the user of the endoscope does not notice that the suction has occurred, the following operation is automatically performed. Before the start of the examination, the degoder 69 reads the model of the attached endoscope based on the serial data transmitted from the code storage unit 66. The decoder 69 determines the pipe diameter of the endoscope, the pipe length, and the application site of the subject,
The safety suction pressure preset for each endoscope and application site is read and stored. During the examination, when mucous membrane suction occurs and the suction pipe internal pressure increases and the pressure of the reflux pressure sensor 58 becomes higher than a preset suction pressure, the control unit 46 sets the switch (SW8) 65 to 0N. The same control as when the control is performed is automatically performed. Therefore, the reflux pump 13 is reversed and the adsorption can be released, which is safe. Then, when the switch 65 is turned ON, the circulation is resumed.

Next, control for improving drainage after water supply will be described. First, automatic air supply after water supply will be described. First, when the switch (SW9) 71 for switching between automatic air supply and normal water supply after water supply is set to 0 N, the second
Of the solenoid valve 27 is opened. At the same time, the first solenoid valve 23 is opened, and a predetermined time (for example, 0.1 sec to 1 sec)
c) After air is supplied, the air supply is closed and the auxiliary air supply pump 61 also returns to the initially set air pressure and ends. As a result, after water supply,
It is possible to supply air for draining at a higher pressure than usual, and the drainage is improved, and after automatic air supply after water supply, it is possible to supply air at the predetermined initial setting pressure for each part that is normal air supply, so it is safe. is there.

On the other hand, the automatic suction after water supply is a switch (SW10) 72 for switching between normal water supply and automatic suction after water supply.
0N, and in this state, a switch (S
W2) When 0N is set to 48, the second solenoid valve 27 is opened. At the same time, the auxiliary suction pump 63 operates to supply water at a predetermined initial set pressure. Set the switch 48 to (SW2) O
FF, the second solenoid valve 27 and the fifth solenoid valve 43
Is closed, and the fourth solenoid valve 39 is operated for a predetermined time (for example, 0.1
After the suction is performed, the fourth solenoid valve 39 is closed, the fifth solenoid valve 43 is opened, the auxiliary suction pump 63 returns to the initially set suction pressure, and ends. Therefore, after water supply, suction for draining is possible at a pressure higher than usual, and drainage is improved, and after automatic water supply after water supply, suction can be performed at the predetermined initial setting pressure for each part which is normal suction. Because it is safe.

FIG. 6 is a schematic structural diagram according to a second embodiment of the present invention. In the present embodiment, instead of the code storage unit of the first embodiment, the type of the endoscope is determined by using a resistor incorporated in the endoscope as the identification means. Other configurations and operations similar to those of the first embodiment are not shown.

As shown in FIG. 6, while the resistor R1 is provided on the endoscope side, the video processor as a fluid control device for the endoscope has a control section 46A.
The resistor R1 differs for each endoscope and indicates model information of the endoscope. The controller 46A includes a resistor R1 of the endoscope.
A reference power supply 73 for applying the reference voltage Vref to the input terminal, a voltage dividing resistor R2 for dividing the reference voltage Vref into a voltage VA by the resistor R1 of the endoscope, and a divided voltage VA obtained by dividing the reference voltage Vref. , An analog / digital (A / D) converter 77 for performing analog / digital conversion of a signal output from the buffer 76, and a digital signal output from the A / D converter 77, and Detect the model,
Decoder 78 as a detection output for outputting various setting signals
And In addition, the video processor sets the pressure of each of the pumps to a predetermined value in accordance with the setting signal output from the decoder 78, and the pressure control unit 7 as a pressure switching output for monitoring the pressure signal of each pressure sensor.
9 and an air / water suction control unit 80 that opens and closes each electromagnetic valve in accordance with the on / off of each of the switches, and controls air supply, water supply, intake and recirculation, and the like.

In this configuration, the decoder 78 reads the digital signal, detects the model of the endoscope, sends the result to the pressure control unit 79, and the pressure control unit 79 checks the inner diameter of the pipe of the endoscope.
The pressure of each of the pumps is adjusted so that the air supply, the water supply, the suction, and the reflux pressure are optimal for the pipe length and the application site of the subject.

The other structure, operation and effect are the same as those of the first embodiment, and the description is omitted.

7 and 8 relate to a third embodiment of the present invention. FIG. 7 is a schematic configuration diagram of an endoscope and a video processor, and FIG. 8 is an external view of a distal end portion of a connector of the endoscope. . In this embodiment, instead of the code storage unit 66 of the first embodiment,
It has a barcode as the means to be identified. Others
Illustration of the same configuration and operation as in the first embodiment is omitted.

As shown in FIG. 8, the connector 5A of the endoscope
Has a light guide connecting pipe 81 projecting in the axial direction at the end thereof, through which a light guide is inserted. The light guide connecting pipe 81 has a bar code 8 on its outer periphery, which is model information of an endoscope.
6 are formed.

On the other hand, a video processor as a fluid control device for an endoscope has a control unit 46B. The control unit 46B converts the bar code 86 of the endoscope into an electric signal and outputs the electric signal.
82 and a signal reading unit 83 as a detection output for outputting various setting signals while detecting a model of the endoscope from signals output from the OMR 82, and a setting signal output from the signal reading unit 83. While the pressure of the pump is set to a predetermined value, the pressure control section 84 monitors the pressure signal of each pressure sensor, and opens and closes each solenoid valve according to the on / off of each switch, thereby supplying air and water. , An air supply / water supply / suction control unit 85 for controlling intake and recirculation and the like.

In this configuration, the signal reader 83 reads the digital signal, detects the type of the endoscope, sends the result to the pressure control unit 84, and the pressure control unit 84 transmits the result to the pressure control unit 84. And the air supply, water supply, suction, and reflux pressures are optimized for the application site of the subject. The other configuration and operation and effect are the same as those of the first embodiment, and the description is omitted.

In each of the above embodiments, the desired pressure suitable for the endoscope is set by using the auxiliary pump 61 for air supply and the auxiliary pump 63 for suction. For example, the opening and closing degree of the solenoid valve may be controlled so that 21 is set to be higher and a desired pressure lower than that is obtained. In this case, the auxiliary pump 61 for air supply and the auxiliary pump 63 for suction become unnecessary.

[0038]

[Effects of the Invention] As described above, according to the present invention, the endoscope is always set at the optimum set pressure regardless of the type of the endoscope, such as the pipe diameter, the pipe length, or the application site of the subject. Observation and inspection can be performed, and there is an effect that safety and reduction of inspection time can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a pipeline system and a control system of an endoscope and a fluid control for the endoscope according to a first embodiment.

FIG. 2 is an overall external view of the apparatus shown in FIG.

FIG. 3 is a timing chart of air supply, water supply, suction, and reflux.

FIG. 4 is a timing chart of air supply, intake, and recirculation stop after water supply.

FIG. 5 is a schematic configuration diagram of a control unit and a code storage unit.

FIG. 6 is a schematic configuration diagram according to a second embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of an endoscope and a video processor according to a third embodiment.

FIG. 8 is an external view of a distal end portion of the connector of the endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 13 ... Reflux pump 46 ... Video processor (fluid control device for endoscope) 61 ... Auxiliary air supply pump 63 ... Auxiliary suction pump 66 ... Code storage part 67 ... ROM 68 ... Shift register 69 ... Decoder 70 … Pressure control unit 89… Air / water suction control unit

Claims (1)

(57) [Scope of request for utility model registration] 1. An apparatus according to claim 1, further comprising means for identifying a model, and a small number of conduits for air supply, liquid supply, suction or reflux.
Control of said conduit for an endoscope having at least one
In the fluid control device for an endoscope, the detecting means for detecting the model by the identified means of the endoscope, the pressure adjusting means for adjusting the operating pressure of the fluid in the conduit, and the detecting means A fluid control device for an endoscope, comprising: pressure switching means for switching an operating pressure of the pressure adjusting means in accordance with the type of the endoscope detected.