JP2004130126A - Electronic endoscope apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic endoscope apparatus capable of suppressing electromagnetic noise generated when using a high-frequency treatment instrument, without needing complicated operation. <P>SOLUTION: This electronic endoscope apparatus, wherein a processor having a ground terminal and an electronic endoscope having a treatment instrument insertion channel for inserting the high-frequency treatment instrument through the tip of an insertion part can be attached/detached through a connector part, is provided with a capacitor grounding cable conductive to the ground terminal; a feedback terminal conductively connected to the treatment instrument insertion channel; and a switching mechanism for making the treatment instrument insertion channel and the capacitor grounding cable conductive in the disconnected state of a conductive cable conductive to a high-frequency current generator, to the feedback terminal, and switching over to a nonconductive state between the treatment instrument insertion channel and the capacitor grounding cable in the connected state of the conductive cable. Further, either one of the feedback terminal and the conductive cable is provided with a push-in type connector for making the feedback terminal and the conductive cable detachable by the resiliency of a spring member. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to an electronic endoscope apparatus using a high-frequency treatment instrument.

が あ る Some endoscopes are provided with a duct (treatment instrument insertion channel) for inserting a treatment instrument. As the above-mentioned treatment tool, for example, a high-frequency treatment tool that removes a lesion or stops bleeding using a high-frequency current is known.

(4) When using a high-frequency treatment device, the counter electrode plate of the high-frequency current generator is attached to, for example, the buttocks of a patient, and in this state, a high-frequency current is applied to the high-frequency treatment device to treat the lesion. At this time, most of the high-frequency current that has flowed into the patient's body through the high-frequency treatment instrument is returned to the high-frequency current generator via the return electrode plate, but the remaining part becomes leakage current (electromagnetic noise) and is monitored. There was a problem that the image was disturbed.

Therefore, in the related art, an electromagnetic noise is suppressed by providing a return terminal electrically connected to the high-frequency treatment instrument on the endoscope and connecting the return terminal to a ground terminal of the processor device by a ground cable.
JP 2003-61899 A

However, in recent years, the form of the high-frequency treatment tool has also been diversified, and depending on the model of the high-frequency treatment tool, the return terminal and the high-frequency current generator are connected by a ground cable, and the leakage current is fed back to the high-frequency current generator to generate electromagnetic noise. There are also some that suppress. For this reason, when using both the type of connecting the feedback terminal to the processor side and the type of connecting the feedback terminal to the high-frequency treatment instrument side, attaching and detaching and replacing the connection cable are complicated. The operability deteriorates due to frequent replacement work. Further, conventionally, since the grounding cable on the processor side or the high-frequency current generator side is connected to the feedback terminal by a screw-type connection connector, the work of attaching and detaching the grounding cable becomes more complicated.

An object of the present invention is to provide an electronic endoscope apparatus that can suppress electromagnetic noise generated when using a high-frequency treatment instrument without requiring complicated operations.

The present invention relates to an electronic endoscope device in which a processor having a ground terminal and an electronic endoscope having a treatment instrument insertion channel for inserting a high-frequency treatment instrument into the distal end of the insertion section are detachable via a connector. And a feedback terminal electrically connected to the treatment tool insertion channel, and a connection path between the treatment instrument insertion channel and the capacitor ground cable when the conduction cable conducting to the high-frequency current generator is not connected to the feedback terminal. A switch mechanism is provided for switching between the treatment tool insertion channel and the capacitor grounding cable to be non-conductive when the conductive cable is connected and the conductive cable is connected.

According to the above configuration, the conduction / non-conduction state between the treatment instrument insertion channel and the capacitor ground cable is automatically switched according to the attachment / detachment of the conduction cable. Therefore, a type in which the feedback terminal and the ground terminal of the processor device are connected by a conductive cable to suppress electromagnetic noise and a type in which the feedback terminal and the high-frequency current generator are connected by a conductive cable without the need for complicated cable replacement work. Both types that suppress electromagnetic noise can be used interchangeably.

に お い て In the electronic endoscope device, specifically, for example, the return terminal is a hollow cylindrical terminal protruding from the connector portion. Here, the connector section may be a connector section on the electronic endoscope side or a connector section on the processor side. The switch mechanism is inserted into the hollow cylindrical return terminal, and is held at a free position protruding outward from the return terminal when the return terminal is not connected to the conductive cable. A protruding member which is held at a pushing position which is pushed down from a free position when connected; a treatment tool insertion channel and a capacitor ground cable which conduct when the protruding member is at the free position; And a switch terminal for disconnecting the insertion channel and the capacitor ground cable.

It is practical for the capacitor ground cable to be built into the processor.

(4) It is preferable to provide a push-type connector that allows the return terminal and the conductive cable to be detachably attached to one of the feedback terminal and the conductive cable that is attached to and detached from the feedback terminal.

The push-in connector can be provided on the conductive cable. In this case, it is preferable that the spring member is a tubular spring member that detachably holds the return terminal at one opening end by elastic force. Specifically, the cylindrical spring member may be, for example, a C-shaped cylindrical spring member having a notch in the axial direction of a hollow cylinder. A push-type connector provided with such a tubular spring member is further fixed to the tip of the conductive cable, and a conductive member for pushing the projection member of the return terminal when the conductive cable is connected to the return terminal; A support member that supports the conductive member, which is inserted into the other open end of the spring member, and an exterior cover that integrally holds the other open end of the tubular spring member, the support member, the conductive member, and the conductive cable It is preferable to provide

Alternatively, the spring member may be a snap ring that detachably holds the return terminal by elastic force. The push-type connector provided with the snap ring is further fixed to the end of the conductive cable, and when the conductive cable is connected to the return terminal, a conductive member that pushes the protrusion member of the return terminal; A small-diameter insertion hole that supports the connection portion of the cable; a medium-diameter insertion hole that communicates with the small-diameter insertion hole and supports the conductive member; and communicates with the medium-diameter insertion hole to expose the tip end surface of the conductive member; A first outer cover having a large-diameter insertion hole into which the return terminal can be freely fitted, and a relay insertion hole communicating with the large-diameter insertion hole to insert the return terminal, and a snap ring is provided in the medium-diameter insertion hole. It is preferable to include a second exterior cover sandwiched and attached to the first exterior cover.

ADVANTAGE OF THE INVENTION According to the electronic endoscope apparatus of this invention, the connection / disconnection between the treatment tool insertion channel and the capacitor ground cable is automatically performed by attaching / detaching the conduction cable connected to the high-frequency current generator to / from the feedback terminal. Switch. Therefore, even when the high-frequency treatment tool of both the type in which the feedback terminal is connected to the processor and the type in which the feedback terminal is connected to the high-frequency current generator is replaced and used, complicated cable replacement work is not required, and Electromagnetic noise that sometimes occurs can be favorably suppressed.

Further, according to the electronic endoscope apparatus of the present invention, since the push-in connector which makes the conductive cable and the feedback terminal connected to the high-frequency current generator detachable by the elastic force of the spring member is provided, the conductive cable and the feedback terminal are provided. The attachment / detachment operation becomes easy, and the operability is further improved.

FIG. 1 is an overall configuration diagram of the electronic endoscope apparatus according to the first embodiment of the present invention. The electronic endoscope apparatus includes an electronic endoscope 10 that captures an image of the inside of a body cavity of a subject, a processor 30 that variously processes images captured by the electronic endoscope 10, and a TV monitor that displays an image processed by the processor 30. 40, a high-frequency treatment instrument 50, and a high-frequency current generator 51 that supplies a high-frequency current to the high-frequency treatment instrument 50.

The electronic endoscope 10 includes a flexible insertion portion 11, an operation portion 12 connected to a base of the insertion portion 11, a universal tube 13 extending from the operation portion 12, and a universal tube 13. And a connector section 14 provided at the tip of the processor 30. The connector section 14 is detachable from the processor 30 via the connector section 14. As shown in FIG. 2, an objective lens 15, a light distribution lens 16, an air / water nozzle 17, and a treatment instrument insertion channel outlet 18 a are arranged on the distal end surface 11 a of the insertion section 11. The image formed by the objective lens 15 is converted into an electronic image by the CCD, and can be observed on the TV monitor 40 via the processor 30. Illumination light from a light source provided in the processor 30 is supplied to the light distribution lens 16 from the connector unit 14 via a light guide passing through the universal tube 13, the operation unit 12, and the insertion unit 11. The air / water supply nozzle 17 is a nozzle for cleaning the objective lens 15.

処置 A treatment tool insertion projection 19 communicating with the treatment tool insertion channel outlet 18a is provided at the connection between the insertion section 11 and the operation section 12. The high-frequency treatment tool 50 is inserted from the treatment tool insertion projection 19, passes through the treatment tool insertion channel 18, and protrudes outward from the treatment tool insertion channel outlet 18a. The connector portion 14 has a return terminal 20 projectingly connected to the treatment instrument insertion channel outlet 18a.

The processor 30 includes a ground terminal G, an equipotential terminal 31 having the same potential as the ground terminal G, and a capacitor ground cable 32 connected to the equipotential terminal 31.

The main feature of this embodiment is that, as shown in FIG. 1 and FIG. 3, the treatment tool insertion is performed according to whether the conduction cable 52 electrically connected to the high-frequency current generator 51 is connected to the feedback terminal 20 or not. The point is that the conduction / non-conduction state between the channel 18 and the capacitor ground cable 32 is switched.

FIGS. 4 and 5 are partial cross-sectional views showing the structure near the feedback terminal 20. FIG. The feedback terminal 20 is a hollow cylindrical terminal, and is supported in a state of protruding outward from the connector portion 14. A projection member 22 is fitted inside the return terminal 20 via a spring member 21. The protruding member 22 and the connector 14 are formed of an insulating material. A switch terminal 23 is fixed to the rear end of the protruding member 22, and a switch substrate 24 that holds the feedback terminal 20 and the protruding member 22 is fixed between the switch terminal 23 and the connector 14. The switch terminal 23 is connected to the equipotential terminal 31 via the capacitor ground cable 32 in order to return the leakage current to the high-frequency current generator 51 when the conduction cable 52 is connected to the feedback terminal 20. Although not shown, the switch board 24 is provided with a switch terminal in contact with the switch terminal 23 at a position facing the switch terminal 23.

雄 A male screw portion 20a is formed on the outer periphery of the feedback terminal 20. A conductive member 55 is fixed to the leading end 52 a of the conductive cable 52, and a nut 59 having a female screw portion 59 a on the inner peripheral surface is attached via the conductive member 55. By completely screwing the male screw portion 20a of the return terminal 20 into the female screw portion 59a of the nut 59, the conduction cable 52 is non-rotatably attached to the return terminal 20. When disconnecting the conductive cable 52 from the feedback terminal 20, the nut 59 may be turned counterclockwise to unscrew the female screw portion 59a and the male screw portion 20a.

(4) When the conduction cable 52 is not connected to the return terminal 20 as shown in FIG. 4, the projection member 22 is held at a free position protruding outward from the return terminal 20 by the urging force of the spring member 21. When the protruding member 22 is at the free position, the switch terminal 23 comes into contact with the switch board 24, and the electrical connection between the treatment instrument insertion channel 18 and the capacitor ground cable 32 is established. That is, as shown in FIG. 1, the treatment tool insertion channel 18 is electrically connected to the equipotential terminal 31 via the capacitor ground cable 32 (the treatment tool insertion channel 18 is grounded). In this conduction state, the leakage current from the high-frequency treatment instrument 50 flows from the treatment instrument insertion channel 18 to the equipotential terminal 31 via the switch terminal 23 and the capacitor ground cable 32. Therefore, a clear endoscopic image can be displayed on the TV monitor 40 without causing electromagnetic noise in the image signal from the CCD.

On the other hand, when the conduction cable 52 is connected to the feedback terminal 20 as shown in FIG. 5, the protruding member 22 is held at the pushing position where the projection cable 22 is completely pushed into the feedback terminal 20 by the conduction cable 52. When the protruding member 22 is in the pushed-in position, the switch terminal 23 is separated from the switch board 24, and the electrical connection between the treatment instrument insertion channel 18 and the capacitor ground cable 32 is made non-conductive. In this non-conduction state, the leakage current from the high-frequency treatment instrument 50 ′ is returned to the high-frequency current generator 51 from the treatment instrument insertion channel 18 via the feedback terminal 20 and the conduction cable 52. Also in this case, a clear endoscopic image can be displayed on the TV monitor 40 without causing electromagnetic noise in the image signal from the CCD.

As described above, in the present embodiment, the connection between the treatment instrument insertion channel 18 and the capacitor ground cable 32 is automatically switched between non-conduction and conduction according to the attachment / detachment of the conduction cable 52. Therefore, the high-frequency treatment tool 50 of a type in which electromagnetic noise is suppressed by connecting the feedback terminal 20 to the equipotential terminal 31 of the processor 30 and the electromagnetic noise is suppressed by connecting the feedback terminal 20 to the high-frequency current generator 51 In the case where both of the high-frequency treatment tools 50 'of this type are replaced and used, it is only necessary to attach and detach the conductive cable 52, and the conventional complicated cable replacement work is not required. Thereby, operability is improved, and quick endoscopy can be performed.

FIG. 6 shows the structure near the return terminal of the electronic endoscope device according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in that a push-in connector 53 that allows the conductive cable 52 and the return terminal 20 to be detachable by the elastic force of a spring member is provided. The configuration other than the push-in connector 53 is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as in FIG.

The push-in connector 53 includes a C-shaped cylindrical spring member 54 for detachably holding the return terminal 20 at one open end 54a, a conductive member 55 fixed to the distal end 52a of the conduction cable 52, and the conductive member 55. It has a supporting member 56 for supporting and an exterior cover 57. The C-shaped cylindrical spring member 54 has a substantially hollow cylindrical shape, and has an elongated notch 54c in its axial direction. As shown in FIG. 7, when the C-shaped cylindrical spring member 54 is cut perpendicularly to the axial direction, its cross section has a substantially C-shaped shape. The inner diameter of the C-shaped cylindrical spring member 54 is smaller than the outer diameter of the male screw portion 20a of the feedback terminal 20 in a natural state (a state in which the return terminal 20 is not mounted). The elastic force acts in the direction toward the inner peripheral side of the cylindrical spring member 54, and the return terminal 20 is tightened by the elastic force.

The conductive member 55 includes a small-diameter cylindrical portion 55a into which the distal end 52a of the conduction cable 52 is inserted, and a projection 55c that pushes the projection 22 of the feedback terminal 20 to the pushing position when the conduction cable 52 is connected to the feedback terminal 20; There is a relay cylinder 55b connecting the small-diameter cylindrical portion 55a and the protrusion 55c. The support member 56 has a support hole 56a penetrating in the axial direction formed on the inner peripheral surface, and a support groove 56b supporting the other open end 54b of the C-shaped cylindrical spring member 54 is formed on the outer edge. The support member 56 is configured such that the distal end surface of the conductive member 55 (projection 55c) is hollowed out of the C-shaped cylindrical spring member 54 by inserting the relay cylinder 55b and the projection 55c of the conductive member 55 into the support hole 56a. The conductive member 55 is supported while being exposed inside. The projection 55c of the conductive member 55 is formed with a retaining ridge 55d that comes into contact with the support hole 56a. The outer cover 57 integrally holds the other open end 54b of the C-shaped cylindrical spring member 54, the support member 56, the conductive member 55, and the conduction cable 52. The support member 56 and the conductive member 55 are all covered by the exterior cover 57 and are not exposed to the outside. As shown in FIG. 6B, only the outer cover 57, the conductive cable 52, and the C-shaped cylindrical spring member 54 are exposed to the outside.

The push-in connector 53 holds the projection member 22 of the return terminal 20 at the pushed-in position via the conductive member 55 by pushing the male screw portion 20a of the return terminal 20 into the C-shaped cylindrical spring member 54. 52 and the feedback terminal 20 are connected. Then, the elastic force of the C-shaped cylindrical spring member 54 acts in the direction of tightening the return terminal 20, and the push-in type connector 53 is prevented from coming off. In this connection state, if the conductive cable 52 is pulled away from the return terminal 20 with a predetermined force or more, the return terminal 20 comes off against the elastic force of the C-shaped cylindrical spring member 54, and the conductive cable 52 is easily connected to the return terminal 20. The connection of the feedback terminal 20 can be released.

If the conductive cable 52 and the return terminal 20 are made detachable by utilizing the elastic force of the C-shaped cylindrical spring member 54 in this manner, the operation of attaching and detaching the conductive cable 52 and the return terminal 20 becomes easier, and the first embodiment is different from the first embodiment. The operability is further improved.

FIG. 8 shows the structure near the return terminal of the electronic endoscope device according to the third embodiment of the present invention. The third embodiment is different from the first embodiment in that a push-in connector 153 according to a different aspect from the second embodiment is provided. The configuration other than the push-in connector 153 is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as in FIG.

The push-in connector 153 includes a snap ring 154 for detachably holding the return terminal 20 by elastic force, a conductive member 155 fixed to the distal end 52 a of the conduction cable 52, and a first exterior cover supporting the conductive member 155. 156 and a second exterior cover 157 attached to the first exterior cover 156. As shown in FIG. 8, the snap ring 154 has a C-shape in which a part of a ring is cut out, and is formed of an elastic material. The inner diameter of the snap ring 154 is smaller than the outer diameter of the male thread portion 20a of the return terminal 20 in a natural state (a state in which the return terminal 20 is not mounted). An elastic force acts in a direction toward the circumferential side, and the return terminal 20 is tightened by the elastic force.

The conductive member 155 includes a small-diameter cylindrical portion 155a in which the distal end 52a of the conduction cable 52 is inserted, and a projection 155c that pushes the projection 22 of the feedback terminal 20 to the pushing position when the conduction cable 52 is connected to the return terminal 20. The small-diameter cylindrical portion 155a and the relay column 155b connecting the protrusion 155c are provided. The protruding portion 155c is formed with a protruding edge portion 155d that comes into contact with the large-diameter insertion hole 156c of the first exterior cover 156. The first exterior cover 156 has a function as a protective cover and a function as a support member for the conductive member 155, and has an insertion hole formed therethrough in the axial direction. The insertion hole includes a small-diameter insertion hole 156a that supports a connection portion between the conductive member 155 and the conductive cable 52, a medium-diameter insertion hole 156b that communicates with the small-diameter insertion hole 156a, and supports the conductive member 155. It is formed by a large-diameter insertion hole 156c that communicates with the diameter insertion hole 156b, exposes the distal end surface of the conductive member 155, and can fit the return terminal 20 therein. The first exterior cover 156 has a fitting groove 156d for supporting the second exterior cover 157 and a support protrusion 156e, which are located at one end side where the large-diameter insertion hole 156c is open. The second exterior cover 157 is attached to the first exterior cover 156 via the fitting groove 156d and the support protrusion 156e in a state where the above-described snap ring 154 is sandwiched between the relay insertion holes 157a. The relay insertion hole 157a is formed to have a size that allows the return terminal 20 to be inserted, and communicates with the large-diameter insertion hole 156c of the first exterior cover 156.

The push-in connector 153 pushes the male screw portion 20a of the return terminal 20 into the large-diameter insertion hole 156c against the elastic force of the snap ring 154, and thereby the protrusion member 22 of the return terminal 20 via the conductive member 55. Is held at the pushing position, and the conduction cable 52 and the feedback terminal 20 are connected. At this time, the elastic force of the snap ring 154 acts in the direction of tightening the return terminal 20, and the push-in connector 153 is prevented from coming off. That is, the male screw portion 20a of the return terminal 20 is held in the large-diameter insertion hole 156c so that the male screw portion 20a does not come out of the large-diameter insertion hole 156c unless a predetermined force or more is applied. If the conductive cable 52 is pulled out from the return terminal 20 with a force greater than a predetermined value, the return terminal 20 comes off against the elastic force of the snap ring 154, and the connection between the conductive cable 52 and the return terminal 20 can be easily performed. Can be canceled.

If the conductive cable 52 and the feedback terminal 20 are made detachable using the elastic force of the snap ring 154 in this manner, the attaching and detaching operation of the conductive cable 52 and the feedback terminal 20 becomes easier, and the operability is higher than in the first embodiment. Is further improved. In the present embodiment, the return terminal 20 is tightened by the snap ring 154 while the male screw portion 20a of the return terminal 20 is held in the large-diameter insertion hole 156c.

In the above-described second and third embodiments, the push-type connector is provided on the conductive cable 52 side. However, the push-type connector may be provided on either the conductive cable 52 or the feedback terminal 20 and provided on the feedback terminal 20 side. It is also possible.

In each embodiment, the feedback terminal 20 is provided in the connector section 14 of the electronic endoscope 10. However, the position where the feedback terminal is provided may be the connector section on the processor side, the processor main body, or the electronic endoscope main body. Good. Further, in the present embodiment, the capacitor ground cable 32 is built in the processor 30, but may be an external type detachable from the processor 30.

As described above, the present invention has been described with reference to the illustrated embodiments, but the electronic endoscope apparatus of the present invention is not limited to the illustrated embodiments.

1 is an overall configuration diagram of an electronic endoscope apparatus to which the present invention is applied, showing a case where a feedback terminal is connected to a ground terminal of a processor. FIG. 2 is a plan view showing a distal end face of an insertion portion of the electronic endoscope shown in FIG. 1. 1 is an overall configuration diagram of an electronic endoscope apparatus to which the present invention has been applied, showing a case where a feedback terminal is connected to a high-frequency current generator. FIG. 2 is a partial cross-sectional view illustrating a structure near a feedback terminal in a conductive state illustrated in FIG. 1. FIG. 4 is a partial cross-sectional view illustrating a structure near a feedback terminal in a non-conductive state illustrated in FIG. 3. FIG. 4A is a partial cross-sectional view illustrating a structure near a feedback terminal (= around a push-in connector) in a non-conductive state illustrated in FIG. 3. (B) is a top view showing a structure near the feedback terminal. It is a cross section of a C type cylindrical spring member. FIG. 6A is a partial cross-sectional view illustrating a structure of a push-type connector according to a different mode from FIG. 5 in a non-conductive state illustrated in FIG. 3. (B) is a top view showing a structure near the feedback terminal. It is a top view showing a snap ring.

Explanation of reference numerals

REFERENCE SIGNS LIST 10 electronic endoscope 11 insertion section 14 connector section 18 treatment tool insertion channel 18a treatment tool insertion channel outlet 19 treatment tool insertion projection 20 return terminal 21 spring member 22 projection member 23 switch terminal 24 switch board 30 processor 31 equipotential terminal (ground) Terminal)
32 Condenser ground cable 40 TV monitor 50 High-frequency treatment tool 51 High-frequency current generator 52 Conductive cable 53 Push-in connector 54 C-type cylindrical spring member (leaf spring member)
55 conductive member 56 support member 57 outer cover 59 nut 153 push-in connector 154 conductive member 155 first outer cover 156 second outer cover

Claims (9)

A processor having a ground terminal and an electronic endoscope device having an electronic endoscope having a treatment instrument insertion channel for inserting a high-frequency treatment instrument at the distal end of the insertion section, wherein the electronic endoscope apparatus is detachable via a connector section.
A capacitor ground cable conducting to the ground terminal;
A feedback terminal conductively connected to the treatment tool insertion channel;
In a state in which a conduction cable that conducts to the high-frequency current generator is not connected to the feedback terminal, the treatment tool insertion channel and the capacitor ground cable are conducted, and in a state in which the conduction cable is connected, the treatment instrument insertion channel is connected to the treatment instrument insertion channel. A switch mechanism for switching between non-conduction with the capacitor ground cable,
An electronic endoscope device comprising: The electronic endoscope device according to claim 1,
The feedback terminal is a hollow cylindrical terminal protruding from the connector portion,
The switch mechanism includes:
It is inserted in the return terminal, is held at a free position protruding outward from the return terminal when the conductive cable is not connected to the return terminal, and when the conductive cable is connected. A projecting member held at a pushing position pushed from a free position,
A switch terminal for conducting the treatment tool insertion channel and the capacitor ground cable when the projection member is at the free position, and for disconnecting the treatment tool insertion channel and the capacitor ground cable when the projection member is at the pushing position;
An electronic endoscope device having the same. 3. The electronic endoscope apparatus according to claim 1, wherein the capacitor ground cable is built in the processor. The electronic endoscope device according to claim 1, wherein the return terminal and the conductive cable are connected to one of the return terminal and a conductive cable detachably attached to the return terminal. An electronic endoscope device provided with a push-type connector which is detachable by elastic force. 5. The electronic endoscope apparatus according to claim 4, wherein the push-type connector is provided on the conduction cable, and the spring member has a tubular shape that detachably holds the return terminal at one open end by elastic force. An electronic endoscope device which is a spring member. 6. The electronic endoscope apparatus according to claim 5, wherein the tubular spring member is a C-shaped cylindrical spring member having a notch in an axial direction of a hollow cylinder. The electronic endoscope device according to claim 5, wherein the push-type connector further comprises:
A conductive member fixed to a tip of the conduction cable, and for pushing a projection member of the return terminal when the conduction cable is connected to the return terminal;
A support member that supports the conductive member, which is inserted into the other open end of the cylindrical spring member,
An exterior cover that integrally holds the other open end of the tubular spring member, the support member, the conductive member, and the conduction cable,
An electronic endoscope device comprising: 5. The electronic endoscope apparatus according to claim 4, wherein the push-type connector is provided on the conduction cable, and the spring member is a snap ring that detachably holds the return terminal by elastic force. Mirror device. The electronic endoscope device according to claim 8, wherein the push-type connector further comprises:
A conductive member fixed to the end of the conductive cable, and for pushing the protrusion of the return terminal when the conductive cable is connected to the return terminal;
A small-diameter insertion hole that supports a connection portion between the conductive member and the conductive cable; a medium-diameter insertion hole that communicates with the small-diameter insertion hole; and a medium-diameter insertion hole that supports the conductive member; A first exterior cover having a large-diameter through-hole through which the distal end surface of the conductive member is exposed, and into which the return terminal can be fitted;
A second exterior cover having a relay insertion hole that communicates with the large-diameter insertion hole and inserts the return terminal, and that is attached to the first exterior cover with the snap ring interposed between the intermediate-diameter insertion holes;
An electronic endoscope device comprising: