JP2000092478A - Electronic endoscope connection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely feed power to a power line at connection of a connector means, after connection of a signal line with a ground line by turning on an on/off switch means so as to feed power to the power line at the connection of the connector means after the end of connection of the signal line with the ground line. SOLUTION: At the start of connection between on endoscope side connector part and a unit side connector part, the conduction of both power lines SPL, UPL, the conduction of a all of both signal lines SSL, USL and the conduction of both ground lines SGL, UGL are obtained but the conduction of feeding control lines SCL, UCL cannot be obtained. When a short pin socket 36S and a short connector pin 42S are connected last and the feeding control lines SCL, UCL are conducted, the voltage having been applied to a base electrode of a transistor(TR) is decreased down to zero volt, and an emitter electrode and a collector electrode of the TR becomes conductive. Thus, the power line SPL at the scope side receives power for the first time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scope provided with a solid-state imaging means and an image signal processing unit for processing an image signal obtained by the solid-state imaging means of the scope. An electronic endoscope connection system comprising connector means for connecting the power supply line, a plurality of signal lines, and a ground line of both the scope and the image signal processing unit to each other by connecting the connector means. Electronic endoscope connection system.

[0002]

2. Description of the Related Art As is well known, an electronic endoscope includes a scope formed of a flexible conduit, solid-state imaging means provided at the distal end of the scope, and a pixel signal obtained by the solid-state imaging means. An image signal processing unit connected to the scope for processing to generate a video signal; and a T for reproducing an image based on the video signal from the image processing unit.
V monitor device.

In an electronic endoscope of the type described above, the solid-state imaging means is, for example, a CCD (charge coupled device).
evice) is configured as an image sensor comprising an image sensor, which is combined with an objective lens system. Also,
An illumination light guide composed of a bundle of optical fibers is inserted into the scope, and the end face of the distal end is combined with the illumination lens.

A white light source for illumination, for example, a halogen lamp or a xenon lamp is provided in the image signal processing unit.
When the scope is connected to the image signal processing unit, the proximal end of the illumination light guide is optically connected to the illumination white light source. Thus, when the scope is inserted into the body cavity of the patient, the front of the objective lens system at the distal end thereof is illuminated with the illumination light emitted from the distal end face of the illumination light guide of the scope, whereby the optical object Is focused on the light receiving surface of the image sensor, where it is photoelectrically converted as a pixel signal. The pixel signals obtained by the image sensor are sent to an image signal processing unit, where a video signal is created based on the pixel signals. Next, the video signal is output from the image signal processing unit to the TV monitor device, where the optical subject image is reproduced on the TV monitor device.

[0005] By the way, more than 200 types of scopes are currently known, and the image signal processing unit is shared with these scopes. For this reason, each scope is detachably connected to the image signal processing unit. For this reason, an electronic endoscope connection system in which connector means is interposed between each scope and the image signal processing unit is used. Adopted. That is, a power line for driving the image sensor and a signal line for transferring an image signal generated by driving the image sensor to the image signal processing unit are provided on both the scope and the image signal processing unit. And a ground line common to a power supply line, a signal line, and the like, and a connector is used to connect these lines between each scope and the image signal processing unit.

In the above-described electronic endoscope connection system, the connector means includes a scope-side contact formed as a terminal of a power line, a signal line and a ground line on each scope side, a power line on the image signal processing unit side,
And a unit side contact formed as a terminal of the signal line and the ground line. For example, the scope-side contact is configured as a bayonet pin, where the unit-side contact is configured as a socket for receiving the bayonet pin.

[0007]

The connection of the connector means, that is, the connection between the insertion pin and the socket, is performed by manual operation. At this time, the electrical connection between the plurality of insertion pins and their corresponding sockets is made simultaneously. It is common that it is not established. For example, if the connection of the power supply line and the signal line occurs before the connection of the ground line, an inadvertent current flows in the signal line, and as a result, the electronic device incorporated therein may be destroyed or the electronic device may be damaged. There is a problem that a malfunction of the endoscope itself occurs.

Therefore, conventionally, when a scope is connected to the image signal processing unit or when the scope is replaced, it is obligatory to turn off the power switch of the image signal processing unit. There is no guarantee that the electronic endoscope will always be protected, and this may cause a malfunction or malfunction of the electronic endoscope.

Accordingly, an object of the present invention is to provide an electronic endoscope connection system of the type described above, in which power supply to the power supply line can be reliably generated after connection of the signal line and the ground line when the connector means is connected. An electronic endoscope connection system configured as described above is provided.

[0010]

According to the present invention, there is provided a scope provided with a solid-state imaging means, and an image signal processing unit for processing an image signal obtained by the solid-state imaging means of the scope. An electronic endoscope connection system comprising connector means interposed between the power supply line, the plurality of signal lines, and the ground line of both the scope and the image signal processing unit by connection of the connector means. To an electronic endoscope connection system. In the electronic endoscope connection system according to the present invention, the power supply line is provided with ON / OFF switch means.
The N / OFF switch means is turned off, and a power supply control mechanism is provided for turning on the ON / OFF switch means and supplying power to the power supply line after connection of the signal line and the ground line is completed at the time of connection by the connector means. Is done.

In the electronic endoscope connection system according to the present invention, the ON / OFF switch means can be incorporated into a power line on the image signal processing unit side or a power line on the scope side. Preferably, the power supply control means comprises a power supply control line provided on the connector means, and the connector means is configured such that the power supply control line becomes conductive after connection of the power supply line, the signal line, and the ground line at the time of connection,
The ON / OFF switch means is turned on by the conduction of the power supply line. Preferably, the ON / OFF switch means is configured as a transistor, and the transistor is turned on by energizing the power supply control line.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an electronic endoscope connection system according to the present invention will be described with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, there is shown an embodiment of an electronic endoscope connection system according to the present invention. The electronic endoscope connection system includes a scope 10 (FIGS. 1 and 2) and image signal processing. It comprises connector means interposed between the unit 12 (FIG. 2). The connector means includes a scope-side connector portion 14 connected to the proximal end of the scope 10 and a unit-side connector portion 16 provided on the image signal processing unit 12 side. In FIG. 1, the connector means is shown in a disconnected state, and in FIG.
The connector means is shown in the connected state.

The scope 10 is comprised of a flexible conduit, the distal end of which is a solid-state imaging device such as a CCD (charge-coupled).
device) Image sensor consisting of image sensor (not shown)
The image sensor includes an objective lens system (not shown) combined with the CCD image sensor. As shown in FIG. 1, the scope-side connector portion 14 includes a box-shaped casing 18, which is made of a suitable synthetic resin material. The casing 18 has a C for driving the above-described image sensor.
A CD driver (not shown) is installed and this CC
The D driver and the image sensor are connected via various signal lines such as a control signal line and an image signal line, and these signal lines are accommodated in the scope 10.

An illumination light guide (not shown) composed of an optical fiber bundle is inserted into the scope 10, and the distal end of the illumination light guide extends to the distal end of the scope 10. An illumination condenser lens (not shown) is incorporated in the end face of the distal end of the guide. The proximal end of the illumination light guide is a light guide connecting rod 20 which projects out from the back of the casing 18 as is evident from FIGS. Further, the scope side connector portion 14 is
A connection ring 22 protruding from the rear surface of the projection 8 is projected, and a connection operation ring 24 is rotatably provided around the connection ring 22.

On the other hand, the image signal processing unit 12 has a box-shaped housing 25, and a rectangular support plate 26 is mounted upright along the inner wall surface of one side wall of the box-shaped housing 25. A circular opening is formed above the rectangular support plate 26, and a cylindrical support 28 is mounted and fixed in the circular opening. As is clear from FIG. 2, the cylindrical support 2
The front part 28A of 8 is made to penetrate the side wall of the box-shaped housing 25, and is projected outside. A cam ring 30 is mounted around the front part 28A, and the whole of the front part 28A and the cam ring 30 is a connection ring adapted to cooperate with the connection ring 22 of the scope-side connector part 14 as described later. Function.

A circular opening is also formed below the rectangular support plate 26, and a connection adapter 32 for the light guide connection rod 20 is mounted and fixed in the circular opening. As is clear from FIG. 2, the front part 3 of the connection adapter 32
2A is also made to penetrate the side wall of the box-shaped housing 25 and protrude to the outside. Note that the connection adapter 32 itself can be formed from a suitable hard synthetic resin. When the connector means is connected, the connection adapter 32 is attached to the scope-side connector portion 14.
The light guide connecting rod 20 is optically connected to a white light source (not shown) such as a xenon lamp or a halogen lamp in the image signal processing unit 12 at this time. In short, the front side of the distal end of the scope 10 is illuminated through the light guide connecting rod 20 and the illumination light guide extending therefrom.

As shown in FIGS. 1 and 2, a circular body 34 made of an insulating material, for example, a suitable synthetic resin material is inserted into the cylindrical support 28 of the unit-side connector portion 16, and the outer end surface thereof is provided. Are provided with a plurality of pin sockets 36 (FIG. 1) arranged radially. As shown in detail in FIG. 3, each pin socket 36 is formed as a sheath-shaped conductor contact, which is accommodated in a blind hole formed in the circular body 34. The sheath-shaped contacts 36 are electrically connected to wiring lines 38 (FIG. 2) projecting from the inner end face of the circular body 34, and these wiring lines 38 are connected to a control wiring board (not shown) of the image signal processing unit 12. You.

On the other hand, a circular body 40 made of the same synthetic resin material as the circular body 34 is also inserted into the connecting ring 22 of the scope side connector portion 14, and is arranged in the same manner as the pin socket 36 from the outer end surface. The pin-type contact or connector pin 42 is projected. The connector pins 42 are electrically connected to wiring lines 44 (FIG. 2) projecting from the inner end surface of the circular body 40, and these wiring lines are connected to the scope 10 via the above-described CCD driver.
Connected to the signal line inside.

As is clear from FIG. 1, the pin socket 3
The total number of 6 is 24, and the circular body 40 is provided with the same number of connector pins 42. Further, each pin socket, that is, the sheath-shaped conductor contact 36 itself is formed of, for example, a copper sheet material, and each connector pin 42 is formed of, for example, a brass material. As shown in FIG. 1, four guide holes 46 are provided in the center region of the outer end face of the circular body 34,
Four guide pins 48 (FIG. 3) are protruded from the central region of the outer end face 0 corresponding to the guide holes 46. Note that the guide pins 48 are thicker than the connector pins 42, so that the guide pins 48
Greater rigidity is provided.

It should be noted here that one of the 24 connector pins 42 is shorter than the other connector pins as shown in FIG. 3, and the corresponding pin socket 36 is also shorter. Yes, and this purpose will be described in detail later. As is clear from FIG. 3, the short connector pin 42 is given 42S as a sub-reference sign, and the short pin socket 36 is given 36S as a sub-reference sign.

In order to connect the connector pins 42 to the pin socket 36, a positioning slot 50 is formed in the front portion 28A of the cylindrical support 28 of the unit-side connector portion 16 as shown in FIGS. This locating slot 50 extends parallel to the central axis of the cylindrical support 28. On the other hand, on the outer front edge side of the outer peripheral surface of the connection ring 22 of the scope side connector portion 14, a positioning projection element 52
Are formed so as to project radially, and the outer diameter of the positioning projection element 52 is made somewhat smaller than the width of the positioning slot 50. The positioning projection element 52 is located
When the connecting ring 22 is positioned with respect to the cylindrical support 28 so as to be aligned with the zero, the plurality of pin sockets 36 are respectively aligned with the corresponding connector pins 42, and only in this state. The connecting ring 22 can be inserted into the front part 28A of the cylindrical support 28.

Also, for connection of the connector pins 42 to the pin socket 36, the front portion 28 of the cylindrical support 28 is
A pair of cam grooves 54 are formed in the cam ring 30 mounted around A as shown in FIG. 1, and the pair of cam grooves 54 are arranged in the diameter direction of the cam ring 30. As shown in the developed view of FIG. 4, each of the cam grooves 54 has an inlet 54A formed on the outer peripheral edge of the cam ring 30 and a slope inclined from the inlet 54A along the circumferential direction of the cam ring 30. A portion 54B and an end portion 54C extending from the tip of the inclined portion 54B along the circumferential direction of the cam ring 30 are included. On the other hand, a pair of follower pin elements 56 (FIG. 2) are provided around the inside of the connection operation ring 24 of the scope side connector portion 14, and the pair of follower pin elements 56 are arranged in the diameter direction.

The operation of connecting the connector pin 42 to the pin socket 36 will be described. First, the positioning projection element 52 is aligned with the positioning slot 50 as described above, and then the connection operation ring 24 is moved around the connection ring 22. The pair of follower pin elements 56 are aligned with the inlets 54 </ b> A of the pair of cam grooves 54. Subsequently, when the scope-side connector portion 14 is pressed against the unit-side connector portion 16, as shown in FIG. 4, the pair of follower pin elements 56 are received in the introduction ports 54 </ b> A of the pair of cam grooves 54 and are short. The other ends of the connector pins 42 other than the connector pins 42S are inserted into the corresponding pin sockets 36 as shown in FIG.

Next, when the connection operation ring 24 is rotated in the direction indicated by the arrow A in FIG.
6 is moved along the inclined portion 54B of the pair of cam grooves 54, so that the scope-side connector portion 14 is drawn toward the unit-side connector portion 16 and each connector pin 42 is drawn into the corresponding pin socket 36. . While the pair of follower pin elements 56 are moved along the inclined portions 54B of the pair of cam grooves 54, the short connector pin 42S is also drawn into the short pin socket 36S.
When the connection operation ring 24 is rotated until the pair of follower pin elements 56 reach the ends of the end portions 54C of the pair of cam grooves 54, all 24 connector pins 42 correspond to each other as shown in FIG. Is completely inserted into the pin socket 36.

When the connector pin 42 is pulled into the pin socket 36, the guide pin 48 is also inserted through the guide hole 36, and the guide pin 48 is given a great rigidity as described above.
Even if a large external force is applied to the scope-side connector portion 16 while the connector pin 42 is being pulled into the connector 6, the connector pin 42 can be reliably connected to the pin socket 36 without deforming the connector pin 42. When the connector pin 42 is connected to the pin socket 36, the light guide connection rod 20 is inserted into the connection adapter 32 as a matter of course.

Referring to FIGS. 6 and 7, wiring diagrams of the electronic endoscope connection system according to the present invention are shown. As described above, the wiring lines 44 (FIG. 2) are electrically connected to each of the connector pins 42 on the scope 10 side. The wiring lines 44 include a power supply line, various signal lines, and a ground line. In FIGS. 6 and 7, the power line on the side of the scope 10 is denoted by reference numeral SPL, one of the signal lines on the side of the scope 10 is typically denoted by reference numeral SSL, and the ground line on the side of the scope 10 is denoted by reference numeral. A connector pin 42 is assigned to each of the power supply line SPL, the signal line SSL, and the ground line SGL. In the present embodiment, the power supply control line is also included in the wiring line 44 on the scope 10 side, and this power supply control line is indicated by a reference numeral SCL,
This power supply control line SCL has a short connector pin 42S.
Is assigned.

The wiring lines 38 are also electrically connected to each of the pin sockets 32 on the image signal processing unit 12 side. The wiring lines 38 include a power supply line, various signal lines, and a ground line. 6 and 7
In the figure, the power line on the image signal processing unit 12 side is indicated by reference numeral UPL, one of the signal lines on the image signal processing unit 12 side is typically indicated by reference numeral USL, and the ground line on the image signal processing unit 12 side The lines are denoted by UGL, and each of the power supply line SPL, the signal line SSL and the ground line SGL is assigned a pin socket 36. In the present embodiment, the power supply control line is also included in the wiring line 38 on the scope 10 side, and the power supply control line is indicated by a reference numeral UCL, and the short pin socket 36S is allocated to the power supply control line UCL.

The power supply line SPL on the scope 10 side is connected to the above-mentioned CCD driver, and a power supply line extends from the CCD driver through the scope 10 to the CCD image sensor on the distal end side. On the other hand, the power supply line USL on the image signal processing unit 12 side is
It is connected to a power supply circuit (not shown) in the image signal processing unit 12 via the NP transistor TR. That is, as is apparent from FIGS. 6 and 7, the power supply circuit is connected to the emitter electrode of the transistor TR and also to the base electrode of the transistor TR via the resistor R1, and at this time, the collector electrode of the transistor TR It is connected to the corresponding pin socket 36. The base electrode of the transistor TR is also connected to the short pin socket 36S via the resistor R2.

The signal line SSL on the scope side has a buffer B
1, and a signal line extending from the CCD driver is connected through a scope 10 to a CCD image sensor at the tip of the scope. On the other hand, the signal line USL on the image signal processing unit 12 side is a buffer B2.
Is connected to a control circuit board in the image signal processing unit 12 via the. Note that the signal line S shown in FIGS.
SL and USL are examples of image signal lines. When both signal lines are connected, the image signal read from the CCD image sensor is sent to the control circuit board in the image signal processing unit 12.

The power supply line SPL on the scope 10 side is grounded via a buffer B1.
The power line UPL on the second side is grounded via a buffer B2. When the ground line SGL and the ground line UGL are connected to each other, the ground on the scope 10 and the ground on the image signal processing unit 12 are electrically connected to each other.

According to the electronic endoscope connection system described above, even if the power of the image signal processing unit 12 is turned ON / O.
Even if the connection of the scope-side connector portion 14 and the connection of the unit-side connector portion 16 are performed with the FF switch turned on, the power supply line UPL on the image signal processing unit 12 side
The power supply to the power line SPL on the scope 10 side is not inadvertently performed, so that the electronic endoscope is reliably prevented from malfunctioning or malfunctioning.

More specifically, the scope-side connector portion 14
When the power ON / OFF switch of the image signal processing unit 12 is turned on in a state where the image signal processing unit 12 is not in contact with the unit side connector portion 16, a predetermined voltage is applied to the emitter electrode side of the transistor TR from the power supply circuit in the image signal processing unit 12. However, at this time, since the voltage dropped by the resistor R1 is also applied to the base electrode of the transistor TR, the region between the emitter electrode and the collector electrode of the transistor TR is turned off. As is clear from FIG. 6, when the connection operation between the scope-side connector portion 14 and the unit-side connector portion 16 is started, conduction of both power supply lines SPL and UPL, conduction of all signal lines SSL and USL, and grounding of both. Line SGL and UGL
, But not the power supply control lines SCL and UCL. This is because the conduction of the power supply control lines SCL and UCL can be obtained only by connecting the short pin socket 36S and the short connector pin 42.

As shown in FIG. 7, the short pin socket 36
When S and the short connector pin 42S are finally connected and the power supply control lines SCL and UCL are turned on, the voltage applied to the base electrode of the transistor TR drops to zero volts, and thus the emitter of the transistor TR The space between the electrode and its collector electrode is turned on, whereby the power supply line SPL on the scope 10 side receives power for the first time. In short, both power supply lines SPL
And UPL, all signal lines SSL and USL, and both ground lines SGL and UG.
After the conduction of L is completed, the power line S on the scope 10 side
Since the PL receives power for the first time, the scope 10 is connected to the power supply line UPL on the image signal processing unit 12 side.
The power supply to the power line SPL on the side is not carelessly performed.

Referring to FIG. 8, there is shown a wiring diagram of a conventional electronic endoscope connection system, and the same reference numerals are used for the same components as those shown in FIGS. 6 and 7. As shown in the figure, when connecting the scope side connector portion and the image signal processing unit side connector portion with the power ON / OFF switch of the image signal processing unit turned on, for example, conduction of both power lines SPL and UPL is performed. And certain signal lines SSL and USL of both
In the case where the ground lines SGL and UGL are made conductive after the continuity is obtained, an inadvertent current flows as shown by an arrow in FIG. 8 between the power supply line and the signal line. The electronic device of the endoscope may be destroyed, or a malfunction may occur in the electronic endoscope.

Therefore, in the conventional electronic endoscope connection system as shown in FIG. 8, the power supply ON / OFF switch of the image signal processing unit is turned off and the scope side connector and the image signal processing unit side connector are turned off. A connection with the part will be required.

Referring to FIG. 9, there is shown a wiring diagram of another embodiment of the electronic endoscope connection system according to the present invention, in which the transistor TR includes the image signal processing unit 1.
It is the same as the previous embodiment except that it is provided not on the side 2 but on the scope 10 side. In the figure, the same reference numerals are used for the same components as those shown in FIGS. 6 and 7.

In the embodiment shown in FIG. 9, even if the connection of the scope side connector portion 14 and the unit side connector portion 16 is performed in a state where the power ON / OFF switch of the image signal processing unit 12 is turned on, the image signal is not changed. Power supply from the power supply line UPL on the processing unit 12 side to the power supply line SPL on the scope 10 side is not carelessly performed. That is, even if both power supply lines SPL and UPL are conducted to each other, the power supply control lines SCL and UCL
Until is conducted, power is not supplied from the power supply line UPL to the power supply line SPL. This is because the conduction of both power supply lines SPL and UPL causes the transistor T
Even if the voltage of the power supply circuit on the image signal processing unit 12 side is applied to the emitter electrode of R, the resistance R
This is because the transistor TR is turned off because a voltage corresponding to the voltage drop of 1 is applied, and the transistor TR is turned on only when the power supply control lines SCL and UCL are turned on.

[0039]

As is apparent from the above description, in the electronic endoscope connection system according to the present invention, when the scope side connector portion and the image signal processing unit side connector portion are connected, both power supply lines, After the continuity of all the signal lines and both the ground lines is reliably obtained, power is supplied from the power supply line on the image signal processing unit side to the power supply line on the scope side. The connection between the scope-side connector portion and the image signal processing unit-side connector portion can be performed without causing the electronic endoscope to malfunction or malfunction while the OFF switch is kept on.

[Brief description of the drawings]

FIG. 1 is a perspective view showing connector means used in an electronic endoscope connection system according to the present invention.

FIG. 2 is a partial sectional view showing the connector means of FIG. 1 in a connected state.

FIG. 3 is an enlarged partial sectional view showing a part of FIG. 2 in an enlarged manner.

FIG. 4 is a partial developed view showing a cam ring used in the connector means of FIG. 1 in an expanded manner.

FIG. 5 is an enlarged partial cross-sectional view similar to FIG. 3, showing an initial stage of a connecting operation of the connector means.

FIG. 6 is a wiring diagram of the electronic endoscope connection system according to the present invention, showing a partial connection state of the connector means.

FIG. 7 is a wiring diagram similar to FIG. 6, showing a completely connected state of the connector means.

FIG. 8 is a wiring diagram of a conventional electronic endoscope connection system, showing a partial connection state of connector means.

FIG. 9 is a wiring diagram of another embodiment of the electronic endoscope connection system according to the present invention, showing a partial connection state of the connector means.

[Explanation of symbols]

 Reference Signs List 10 scope 12 image signal processing unit 14 scope side connector part 16 unit side connector part 18 casing 22 connection ring 24 connection operation ring 30 cam ring 32 connection adapter 36 pin socket 38 wiring line 42 connector pin 44 wiring line SPL / UPL power supply line SSL・ USL signal line SGL ・ UGL ground line SCL ・ UCL power supply control line TR transistor R1 ・ R2 resistor B1 ・ B2 buffer

Claims (5)

[Claims] 1. A scope provided with a solid-state imaging means, and a connector means interposed between the scope for detachably connecting an image signal processing unit for processing an image signal obtained by the solid-state imaging means of the scope. An electronic endoscope connection system, wherein a power line, a plurality of signal lines, and a ground line of both the scope and the image signal processing unit are connected to each other by connecting the connector means. In the endoscope connection system, the power supply line is provided with ON / OFF switch means, and the ON / O switch is provided when the connector means is not connected.
FF switch means is turned off, and power supply control means for turning on the ON / OFF switch means and supplying power to the power supply line after connection of the signal line and the ground line is completed at the time of connection by the connector means is provided. An electronic endoscope connection system characterized by the above-mentioned. 2. The electronic endoscope connection system according to claim 1, wherein said ON / OFF switch means is incorporated in a power supply line on said image signal processing unit side. 3. The electronic endoscope connection system according to claim 1, wherein the ON / OFF switch means is incorporated in a power line on the scope side. 4. The electronic endoscope connection system according to claim 1, wherein the power supply control means includes a power supply control line provided in the connector means, and the connector means includes a power supply control line. The power supply control line is configured to be conductive after the power supply line, the signal line, and the ground line are conductive when connected, and the ON / OFF switch means is turned on by the conduction of the power supply control line. Electronic endoscope connection system. 5. The electronic endoscope connection system according to claim 4, wherein the ON / OFF switch means is configured as a transistor, and the transistor is turned on by conduction of the power supply control line. Electronic endoscope connection system.