JPH0657195B2 - 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 to provide a CCD.
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 comprises a control device for processing the video signal obtained from D and a television monitor for displaying an image. That is, in the electronic endoscope apparatus, as shown in FIG. 3, the CCD 12 is built in the distal end portion of the endoscope insertion portion 10, and the video signal from the CCD 12 is transmitted to the control device 14 via the multicore cable 16. Further, the video signal processed by the control device 14 is transmitted to a television monitor (not shown) to display the video 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 multicore cable 16 is shielded by a shield tube 18.
The shield tube 18 is a DCG inside the setup board 20 '.
It is connected to ND.

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 video signal line 16 and the video return line 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 16. Therefore, the noise that has entered the video signal line 16 is canceled by the differential amplifier 24, so that the differential amplifier 24 outputs a video signal whose noise has been canceled, and a clear image is displayed on the screen of the monitor television. To be done.

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. 3, 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 electric scalpel device 28 is turned on, high-frequency noise is generated due to high-frequency energization, and this high-frequency noise enters the electronic endoscope. In this case, the high frequency noise that has entered the electronic endoscope enters the video signal line 16. The high-frequency noise that has entered these cables is not necessarily canceled by the differential amplifier 24 because the waveform, amplitude, and phase do not necessarily match.

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 Control device side connector, electronic endoscope side connector provided on the side of the electronic endoscope and connectable to the control device side connector, and power supply and image connecting the electronic endoscope side connector and the solid-state imaging device A shield tube that shields a multi-core cable that transmits signals, solid-state image sensor drive pulses, etc. and an electronic endoscope are provided, and one end is connected to a high frequency scalpel device and is connected to the metal part of the electronic endoscope. A leakage bypass wire, one end connected to the leakage bypass wire, the other end is characterized by having a a capacitor which is grounded to the control device to connect the electronic endoscope connector and a control device connector.

[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 side.

〔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,
As shown in FIG. 1, a male connector 72 having a built-in setup board 20 'shown in FIG. 2 is formed via a connecting portion 70 extending from a hand operation unit (not shown). It is provided. The terminal pins 72A, 72B, ... Of the male connector portion 72 are connected via multi-core cables 74, ... .
Further, an end of a short-circuit member 76 made of a metal elastic piece is fixed to the male connector 72 via a screw 78. The short-circuit member 76 and the screw 78 are made of metal, and one end of a bypass capacitor 86 is connected to the screw 78. Further, 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. Capacitor 86 is screw 7
It is connected to the short-circuit member 76 via 8. As shown in FIG. 1, the metal fitting port 76A has a leakage bypass wire 88.
It is connected to the electric knife device 90 via.

As shown in FIG. 1, a high-frequency snare 92 is connected to the electrosurgical knife device 84, and the ring for cutting the affected part of the high-frequency snare 92 is a treatment of the endoscope insertion portion as shown in the conventional example of FIG. It projects from the tip of the tool insertion channel. This high frequency snare 92 is a forceps channel 9 sealed with a metal plating layer.
4 has been inserted.

Further, as shown in FIG. 1, the control device 102 is provided with a female connector 100 via screws 101, 101. The female connector 100 is made of a metal material. The female connector 100 is provided with a socket terminal (not shown), and the terminal pins 72A, 72B, ... Of the male connector 72 are inserted into the socket terminal.
00, the short-circuit member 76 of the male connector portion 72 is provided inside the case.
Come into contact with. Further, the socket 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, the male connector portion 72 is fixed to the female connector 100, and the terminal pins 72A, 72B ... Are connected to the socket terminals. At the same time, the short-circuit member 76 comes into contact with the case metal of the female connector 100 and the controller case. Short circuit to. 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 control device housing through the metal fitting port 70A, the capacitor 86, the screw 78, the short-circuit member 76, and the female connector 100, and further, through the leakage bypass wire 88, the electric scalpel. Since it is connected to the device 90, high frequency noise can escape to the female connector 100 and the electrosurgical knife device 90. Further, since the shield tube 82 is grounded to DCGND in the setup board 20 'and the leakage bypass wire 88 is grounded to the female connector 100 via the capacitor 86 and the short-circuit member 76, high frequency noise is transmitted to the multicore cable 74. Don't get in. 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 90 and does not leak to the electronic endoscope side.

Although the leakage bypass wire 84 is connected to the short circuit member 76 in the above-described embodiment, the leakage bypass wire 84 is not limited to this and may be connected to the DC GND provided in the electronic endoscope and grounded to the control device 102.

Although the shield tube 82 is grounded to DCGND in the above embodiment, it may be connected to the short-circuit member 76.

〔The invention's effect〕

As described above, according to the electronic endoscope apparatus of the present invention, high-frequency noise generated when operating the high-frequency scalpel device enters the electronic endoscope, but this high-frequency noise is transmitted to the control device via the capacitor. You can escape.

Further, when a direct current leaks from the power supply of the control device, the direct current is cut off by the capacitor, so that the leak to the electronic endoscope side 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. It is a schematic explanatory drawing which concerns on the conventional electronic endoscope apparatus. 20 '... setup board, 24 ... differential amplifier,
70A ... Metal fitting port, 72 ... Male connector section, 74 ...
Multicore cable, 76 ... Short-circuit member, 78 ... Screw, 82
…… Shield tube, 84, 88 …… Leakage bypass cable, 86 …… Capacitor, 90 …… Electric knife device,
100 ... Female connector, 102 ... Control device.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-59-11829 (JP, A) JP-A-60-83633 (JP, A) JP-A-60-83640 (JP, A) JP-A-60- 270024 (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 controller side connector, and a power supply, a video signal and a solid state image pickup device drive connecting the electronic endoscope side connector and the solid state image pickup device A shield tube that shields multicore cables that transmit pulses, etc., and a leakage bypass that is provided on the electronic endoscope and has one end connected to the high-frequency scalpel device and the metal part of the electronic endoscope. An electronic endoscope having a switch wire, one end of which is connected to the leakage bypass wire, and the other end of which is grounded to the control device when the electronic endoscope side connector and the control device side connector are connected to each other. apparatus.