JPH0657196B2 - Electronic endoscopic device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic endoscope apparatus, and in particular, a solid-state image sensor (hereinafter referred to as CCD) is provided at the tip of an endoscope insertion portion,
The present invention relates to an electronic endoscope device that processes a video signal obtained from the device by a control device and displays a subject on a screen of a monitor television.

[Conventional technology]

The electronic endoscope apparatus mainly includes an electronic endoscope including an insertion portion and a manual operation portion, and generates a CCD timing pulse or CC.
It is composed of a control device that processes the video signal obtained from D and a television monitor that displays an image. As shown in FIG. 5, a CCD 12 is built in at the tip of the endoscope insertion part 10, and an image from the CCD 12 The signal is transmitted to the control device 14 via the multi-core cable 16, the video signal processed in the control device 14 is transmitted to a monitor television (not shown), and the video is displayed on the screen.

The multi-core cable 16 is connected to the male connector 20 which is connected to the manual operation part 17 via a connecting part. The shield of the video coaxial line in the multi-core cable 16 is connected to the male connector 20 via the video return cable 22.

The control device 14 is provided with a differential amplifier 24, and the differential amplifier 24 is connected to a female connector 26 via cables 24A and 24B. When the male connector 20 is connected to the female connector 26, the multi-core cable 16 and the video return cable 22 are connected to the differential amplifier 24 via the cables 24A and 24B.

On the other hand, noise may occur when the electronic endoscope apparatus is operated, and the noise may enter the video signal line 16. This noise also enters the video return cable 22. Therefore, the noise that has entered the video signal line 16 and the video return line 22 is canceled by the differential amplifier 24. Therefore, the differential amplifier 24 outputs a noise-cancelled video signal, and a clear video is displayed on the monitor. Displayed on the TV screen.

In this state, the high frequency snare 29 of the electric knife device 28 is
When the affected part 30 of the patient 34 is cut using the treatment tool insertion channel C of the electronic endoscope, the high frequency snare 29 is operated while watching the image on the monitor TV, and the ring 32 of the high frequency snare 29 is hung on the affected part 30. The foot switch (not shown) of the electric scalpel device 28 is turned on, and a high frequency current is passed through the wheel 32 to cut the affected area.

In FIG. 5, 36 is a patient electrode plate and 38 is a patient electrode 3.
6 is a cable connecting the electrosurgical knife device 28, 39 is a light guide connector, and 40 is a leakage bypass wire of the electrosurgical knife device 28.

[Problems to be solved by the invention]

However, when the foot switch of the electrosurgical knife device 28 is turned on, high-frequency noise occurs due to high-frequency energization, and this high-frequency noise enters the video signal line that transmits the video signal. In this case, the high-frequency noise that enters the video signal line and the video return line 22 does not necessarily have the same waveform, amplitude, and phase, and therefore is not canceled by the differential amplifier 24.

Therefore, when the foot switch is turned on and a high-frequency current is applied to the high-frequency snare 29, the image on the monitor television becomes unclear and the affected area 30 cannot be seen.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electronic endoscope apparatus capable of viewing a diseased part on a monitor television while cutting the diseased part with an electric scalpel device and stopping hemostasis.

[Means for solving problems]

In order to achieve the above object, the present invention provides a treatment instrument insertion channel of an electronic endoscope in which a video signal output from a solid-state imaging device provided at the tip of an insertion portion is processed by a control device and displayed on a screen of a television monitor. In an electronic endoscope device that cuts the affected part with a high-frequency scalpel device and bleeds through the device, it is provided on the control device side and connected to the power supply of the control device, the video signal processing circuit, the solid-state image sensor timing pulse generation circuit, etc. The control device side connector and the electronic endoscope side connector that is provided on the electronic endoscope side and can be connected to the control device side connector, and the electronic endoscope side connector that is connected to the high frequency scalpel device at one end When the leakage bypass wire connected to the metal part of the endoscope is connected to the leakage bypass wire at one end and the electronic endoscope side connector and the control device side connector are connected at the other end, the control device becomes It is characterized by having a capacitor which is the earth, the.

[Action]

According to the present invention, one end of the leakage bypass wire is connected to the high frequency scalpel device, the other end is connected to the leakage bypass wire, and the other end is grounded to the control device when the electronic endoscope side connector and the control device side connector are connected. Has a capacitor that is

Therefore, high-frequency noise generated when operating the high-frequency scalpel device enters the electronic endoscope, and this high-frequency noise can be released to the control device via the leakage bypass wire and the capacitor.

Further, since the leakage bypass wire is provided with a capacitor, leakage DC current from the power supply of the control device does not leak to the electronic endoscope.

〔Example〕

Hereinafter, preferred embodiments of an electronic endoscope apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

The electronic endoscope device mainly includes an endoscope insertion part, a hand operation part,
A male connector portion which is composed of a control device and a monitor television and has a built-in setup board 20 'shown in FIG. 2 via a connecting portion 70 extending from a hand operation portion (not shown) as shown in FIG. 72 are provided. The terminal pins 72A, 72B, ... Of the male connector portion 72 are connected via a multi-core cable 74 to a CCD or the like built in the tip of the endoscope insertion portion (not shown in FIG. 1). Further, an end of a short-circuit member 76 made of a metal elastic piece is fixed to the male connector portion 72 via a screw 78. The short-circuit member 76 and the screw 78 are made of metal. As shown in FIGS. 1 and 2, one end of the leakage bypass wire 84 is connected to the metal fitting port 70A of the connecting portion 70. A capacitor 86 is connected to the other end of the leakage bypass wire 84. The capacitor 86 is connected to the short-circuit member 76 via a screw 78. As shown in FIG. 1, the metal fitting port 70A is connected to the electric scalpel device 90 via a leakage bypass wire 88.

As shown in FIG. 1, the high frequency snare 92 is connected to the electric knife device 84, and the ring for cutting the affected part of the high frequency snare 92 is the tip of the endoscope insertion portion as shown in the conventional example of FIG. Protruding from. The high frequency snare 92 is inserted into the forceps channel 94 sealed with a metal plating layer.

Further, as shown in FIG. 1, the control device 102 is provided with a female connector 100. The case of the female connector 100 is formed of a metal material. Female connector 10
0 is provided with a receptacle terminal (not shown), and the terminal pins 72A, 72B, ... Of the male connector portion 72 are inserted into the receptacle terminal. At this time, the male connector portion is provided inside the case of the female connector 100. The short-circuit member 76 of 72 contacts. Also,
The receptacle terminal is electrically connected to a power supply unit, a processing unit, and the like (not shown) of the control device 102.

The operation of the electronic endoscope apparatus according to the present invention configured as described above will be described.

First, when the male connector 72 is fixed to the female connector 100 and the terminal pins 72A, 72B, ... Are connected to the socket terminals, the short-circuit member 76 and the female connector 100 are in contact at the same time. In this state, a voltage is applied to the CCD from a power source (not shown) of the control device 102 so that the CCD outputs a video signal. This video signal is transmitted to a processing unit (not shown) of the control device 102 via the multi-core cable 74 and subjected to image processing to display a video on the monitor television.

Next, while watching the image on the monitor TV, the distal end of an electronic endoscope (not shown) is operated to search for the affected area, and the high frequency snare 92 is operated to hang on the affected area. Next, the foot switch of the electric scalpel device 90 is operated to supply a high frequency current to the high frequency snare 92 to cut the affected part and stop the bleeding. At this time,
Since high-frequency current is passed, high-frequency noise is generated and enters the electronic endoscope. However, the electronic endoscope is electrically connected to the female connector 100 via the metal fitting port 70A, the capacitor 86, the screw 78, and the short-circuit member 76, and further, via the leakage bypass wire 88, the electrosurgical knife device 90.
Since it is connected to the female connector 1
00 and the electric knife device 90 can be released. Therefore, a clear image can be displayed on the monitor television.

Further, the leakage bypass wire 84 is connected to the capacitor 86.
Is provided, the DC current leaking from the power supply of the control device 102 is cut off by the capacitor 86 and does not leak to the electronic endoscope side.

Although the leakage bypass wire 84 is connected to the connector 100 of the control device via the capacitor 86, the screw 78, and the short-circuit member 76 in the above-described embodiment, the present invention is not limited to this, and the other end of the capacitor may be connected as shown in FIG. , DCGND may be connected.

Another embodiment of the electronic endoscope apparatus according to the present invention will be described below with reference to FIG. The same members as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

A CCD 112 is built in the tip of the electronic endoscope 99, and the male connector portion 72 of the connecting portion 70 and the CCD 112 are connected by a multi-core cable 114. The multi-core cable 114 is provided with a cable 114A for transmitting the video signal output from the CCD 112.

In addition, the male connector 72 and C connected to the hand operation part are
The multi-core cable 114 is connected to the CD 112. As shown in FIG. 3 and FIG. 4, this DCGND11
The other end of the capacitor 86, one end of which is connected to the leakage bypass wire 84, is connected to 0. DC
The power ground cable 110 is connected to the terminal pins 72D of the male connector section 72.

Further, the control device 102 is provided with the female connector 100, and when the male connector portion 72 is connected to the female connector 100, the DCGND 110 is grounded to the control device 102 via the terminal pin 72D and the socket terminal 100D. To be done.

The operation of another embodiment of the electronic endoscope apparatus according to the present invention configured as described above will be described.

First, the electronic endoscope 99 is operated to find the affected part, and a high frequency current is applied to the high frequency snare 92 to cut the affected part, whereby high frequency noise is generated by the energization, and the high frequency noise enters the electronic endoscope apparatus. However, the connecting portion 70
The electronic endoscope 99 is electrically connected to the control device 102 via the metal fitting port 70A, the leakage bypass wire 84, the condenser 86, and the DCGND 110, and further connected to the electric scalpel device 90 via the leakage bypass wire 88. Therefore, high frequency noise can be released to the control device 102 and the electrosurgical knife device 90. Therefore, even if high-frequency noise is generated, it does not enter the cable 114A that outputs the video signal from the CCD, so that a clear video can be displayed on the monitor television.

Further, the leakage bypass wire 84 is connected to the capacitor 86.
Is connected, the DC current leaking from the power supply of the control device 102 is cut off by the capacitor 86 and does not leak to the electronic endoscope side.

〔The invention's effect〕

As described above, according to the electronic endoscope apparatus of the present invention, high-frequency noise generated during operation of the high-frequency scalpel device enters the electronic endoscope, but this high-frequency noise is generated by the leakage bypass wire and the capacitor. To the control device.

Further, when a DC current leaks from the power supply of the control device, the DC current is cut off by the capacitor, so that the leakage to the electronic endoscope can be prevented.

Therefore, when using an electric scalpel, it is possible to display a clear image on the monitor TV screen, so that the affected part is not lost when the affected part is cut, and furthermore, even if a direct current leaks from the power supply, it leaks to the electronic endoscope. Since it is possible to prevent, the safety at the time of cutting is improved.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of an electronic endoscope apparatus according to the present invention, FIG. 2 is an exploded perspective view of an endoscope side connector of the electronic endoscope apparatus according to the present invention, and FIG. FIG. 4 is a schematic view showing another embodiment of the electronic endoscope apparatus according to the present invention, and FIG. 4 is an exploded perspective view of an endoscope side connector of another embodiment of the electronic endoscope apparatus according to the present invention. FIG. 1 is a schematic explanatory view of a conventional electronic endoscope device. 20 '... setup board, 24 ... operational amplifier,
70A ... Metal fitting port, 72 ... Male connector section, 74 ...
Multi-core cable, 76 ... Short-circuit member, 78 ... Screw, 8
4, 88 ... Leakage bypass cable, 86 ... Capacitor, 90 ... Electric knife device, 100 ... Female connector, 102 ... Control device, C ... Treatment instrument insertion channel.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 59-11829 (JP, A) JP 60-83640 (JP, A) JP 61-10915 (JP, A)

Claims (1)

[Claims] 1. A high-frequency scalpel device through a treatment instrument insertion channel of an electronic endoscope, which processes a video signal output from a solid-state image pickup device provided at the tip of an insertion portion by a control device and displays it on a screen of a television monitor. In an electronic endoscope device that cuts and bleeds the affected area with a control device side connector that is provided on the control device side and is connected to the power supply of the control device, the video signal processing circuit, the solid-state image sensor timing pulse generation circuit, etc. , An electronic endoscope side connector provided on the electronic endoscope side and connectable to a control device side connector, and an end portion connected to the high frequency scalpel device provided on the electronic endoscope and a metal part of the electronic endoscope. The connected leakage bypass wire, one end of which is connected to the leakage bypass wire, and the other end of which is connected to the connector for the electronic endoscope and the connector for the control device to be grounded to the control device. An electronic endoscope apparatus comprising: