JPH11344678A - Electronic endoscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely reduce the radiation of noise from an electronic endoscope having a solid-state image pickup element and the entry of noise from the outside. SOLUTION: Respective exterior metal bodies such as the tip part metal body 12a of a tip part, the curved part metal body 13a of a curved part, the flexible pipe part metal body 14a of a flexible pipe part, the operation part metal body 8a of an operation part, the universal cord part metal body 9a of a universal cord part, the scope connector part metal body 10a of a scope connector part, and the external shell 61 of an electric contact connector part are connected to patient GND at the same potential through a connecting means 95, 102, 105, and 106.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic endoscope apparatus, and more particularly, to an electronic endoscope apparatus characterized by a portion that reduces the emission of unnecessary radiation noise and the like.

[0002]

2. Description of the Related Art Conventionally, a slender insertion portion is inserted into a body cavity to observe a diseased part in the body cavity, and if necessary, a treatment instrument is inserted into a forceps channel of an endoscope to perform a treatment. Endoscopes that can be used are widely used. As the endoscope, for example, a solid-state imaging device such as a CCD at the distal end of the insertion portion is built in, a signal photoelectrically converted by the solid-state imaging device is transmitted through a signal cable, and converted by a video processor as signal processing means. An electronic endoscope apparatus is used in which a video signal is displayed in color on a monitor device.

An electric signal transmitted from the solid-state imaging device to a video processor via a signal cable is a high-frequency signal. Therefore, noise is easily radiated from a signal cable for transmitting an electric signal.
Further, the endoscope is formed by variously incorporating conductive metal members, and the endoscope is configured by incorporating a signal cable, a light guide, and the like into the plurality of metal members.

However, when constructing an endoscope, no consideration is given to the position of these built-in components with respect to the metal members, and priority is given to regularity in consideration of workability during assembly. . For this reason, after assembling the endoscope,
A signal cable or the like is separated from a metal member forming an exterior, and the radiation of noise tends to increase.

The signal lines are connected to individual circuits GND. However, since the means for securing electrical conduction after assembling the metal member forming the exterior has not been clarified, noise radiation is not provided. There was a tendency to increase.

Therefore, for example, in Japanese Patent Application Laid-Open No. 9-43520, a conductive exterior member such as an exterior metal body of an endoscope and an electromagnetic interference countermeasure unit are connected and held at the same potential, so that a large capacitance is obtained. 2. Description of the Related Art An electronic endoscope has been proposed which is formed to reduce radiation of noise and intrusion of noise from outside.

[0007]

However, in the above-mentioned Japanese Patent Application Laid-Open No. 9-43520, the external metal body of the endoscope and the electromagnetic interference means are connected to the same potential, and a large capacitance is formed. However, since they are floating from the GND potential, there is a problem that noise cannot be reliably reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an electronic endoscope capable of reliably reducing the emission of noise from an electronic endoscope having a solid-state image sensor and the intrusion of noise from the outside. It is intended to provide a mirror device.

[0009]

An electronic endoscope apparatus according to the present invention includes an electronic endoscope having a solid-state image pickup device built in at a distal end portion of an insertion section, and a circuit for processing input / output signals of the solid-state image pickup device. In the electronic endoscope device comprising a video processor, a plurality of conductive members disposed in the electronic endoscope are connected to the same potential in series, and the potential of the conductive members is set to the It is provided with connection means for setting the same potential as GND of the patient circuit provided in the video processor.

[0010] In the electronic endoscope apparatus according to the present invention, the connecting means connects a plurality of conductive members provided on the electronic endoscope to the same potential in series and connects the conductive members to each other. By making the potential the same as the GND of the patient circuit provided in the video processor, it is possible to reliably reduce the emission of noise from the electronic endoscope having the solid-state imaging device and the intrusion of noise from the outside. Make it possible.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 10 relate to an embodiment of the present invention, and FIG. 1 is a configuration diagram showing a configuration of an electronic endoscope apparatus.
FIG. 2 is a cross-sectional view showing a configuration near the distal end of the electronic endoscope in FIG. 1, FIG. 3 is a configuration diagram showing a configuration of an electric system of the electronic endoscope in FIG. 1, and FIG. FIG. 5 is a cross-sectional view showing the configuration of the electrical contact connector part of FIG. 1, FIG. 6 is an enlarged view showing details of a part C of FIG. 5, and FIG. 7 is a contact part substrate of FIG. Is a view as viewed from the arrow A, and FIG.
FIG. 9 is a cross-sectional view showing the configuration of the scope connector unit shown in FIG. 1, and FIG. 10 is a cross-sectional view showing the configuration near the operation unit shown in FIG.

First, an electronic endoscope apparatus according to the present embodiment will be described with reference to FIGS.

As shown in FIG. 1, an electronic endoscope apparatus 1 according to the present embodiment has an electronic endoscope 2 provided with a measure against electromagnetic interference.
And a light source device 3 for supplying illumination light by connecting the electronic endoscope 2, and a solid-state imaging device connected to the electronic endoscope 2 via a scope cable 4 and built in the electronic endoscope 2. (Hereinafter abbreviated as SID) 32 (see FIG. 2), a video processor 5 that performs signal processing, and a color monitor 6 that displays a video signal input via a monitor cable connected to the video processor 5. Is done.

The electronic endoscope 2 has an elongated insertion portion 7 inserted into a body cavity or the like, an operation portion 8 formed at the rear end of the insertion portion 7, and extends from the operation portion 8. It has a universal cord section 9 and a scope connector section 10 provided at an end of the universal cord section 9 and detachably connected to the light source device 3. This scope connector section 10
An electrical contact connector section 11 is provided on the side of the scope cable 4. The other end of the scope cable 4 provided with a detachable electrical connector 4e on the electrical contact connector section 11 is detachably connected to a video processor 5 by an electrical connector 4f. You.

The insertion section 7 includes a front end portion 12 provided with an imaging unit 47 (see FIG. 2) having an SID 32, and a bendable bending portion 13 formed at the rear end of the front end portion 12.
And a long flexible tube section 14 extending from the rear end of the curved section 13 to the front end of the operation section 8.

The operating section 8 is provided with a bending operation knob 15, and the bending section 13 can be bent by gripping the grip section 16 and operating the bending operation knob 15. An air supply / water supply control unit 17 for controlling air supply / water supply and a suction control unit 1 for controlling suction are provided on the side of the operation unit 8.
8 are provided. Further, a switch section 19 provided with a plurality of switches 19a is provided at the top of the operation section 8.

Further, an air supply / water supply line (not shown) is inserted into the insertion portion 7, and this air supply / water supply line is connected to an air supply / water supply control portion 17 by an operation portion 8, and furthermore, a universal cord portion. The end reaches the scope connector 10 via the air / water supply pipe inserted through the inside 9, and is connected to the air / water supply mechanism in the light source device 3.

A suction pipe (not shown) inserted into the insertion section 7 branches into two near the front end of the operation section 8, one of which is in communication with the forceps port 20, and the other of which is connected via the suction control section 18. It communicates with a suction conduit (not shown) in the universal cord section 9 and reaches a suction base (not shown) of the scope connector section 10. In addition, the suction conduit is a distal end opening 21 which is opened at the distal end portion 12. The distal end opening 21 serves as a suction port for performing suction during a suction operation, and a forceps outlet from which the forceps are projected when forceps are inserted through the forceps port 20. Becomes Insertion part 7,
A light guide 42 (see FIG. 2) for transmitting illumination light is inserted into the operation section 8 and the universal cord section 9, and the rear end of the light guide 42 reaches the scope connector section 10 and a lamp inside the light source device 3. The illumination light supplied from is transmitted from the distal end surface fixed to the illumination window 22 of the distal end portion 12 to illuminate a subject such as an affected part.

The illuminated subject is, as shown in FIG.
The SID 3 arranged at the image forming position by the observation optical system 31 attached to the observation window 23 provided adjacent to the illumination window 22
2 and is photoelectrically converted by the SID 32. An SID cable (or signal cable) 33 is connected to the SID 32, and the SID cable 33 is connected to the scope cable 4 via a noise reducer 62 (see FIG. 3) described later housed in the scope connector unit 10. The scope cable 4 is connected to a video processor 5.

Next, the configuration of the electric system of the electronic endoscope 2 will be described with reference to FIG. Here, among the members constituting the electronic endoscope 2, a portion (exterior metal body) related to electrical connection will be described.

As shown in FIG. 3, the outer metal body constituting the electronic endoscope 2 includes a distal end metal body 12a of the distal end portion 12, a bending portion metal body 13a of the bending portion 13, and a flexible tube portion 14. Insertion part metal body 7 of insertion part 7 made of flexible tube part metal body 14a
a, an operating part metal body 8a of the operating part 8, a universal cord metal part 9a of the universal cord part 9, a scope connector metal part 10a of the scope connector part 10, and an outer shell 61 of the electrical contact connector part 11. .

These exterior metal bodies are connected to each other by connecting means 95, 96, 97, 98, 99, 100 so that they have the same potential.

An SID 32 constituting an image pickup unit 47 for outputting an image is provided inside the distal end metal body 12a. SID drive lead 32a of SID32
Is connected to a coaxial line 33a as a drive system. On the other hand, the video signal output lead 32b is connected to a video output signal transmission coaxial line 33b via a video output signal amplification circuit board 48. These coaxial lines 33
The a and 33b are covered with a comprehensive shield 33d on the outer periphery. The SID cable 33 is extended to the electrical contact connector section 11 via a noise reducer 62 composed of the inside of the exterior metal body and a ferrite core and a coil provided on the exterior metal body, and is transmitted to the video processor 5.

A switch 19a provided near the operation unit 8
The active-side signal line 63 for operating the switch
And the GND line 64 are connected to the contacts and guided to the electrical contact connector section 11. Signal line 63 and GND line 6
Reference numeral 4 denotes shields 63a and 64a provided on the outer periphery of the signal line. These overall shield 33d, shield body 6
3a and 64a are collectively connected to the inner shell 65 at the same potential in the electrical contact connector section 11.

When the electronic endoscope 2 is connected to the video processor 5 via the scope cable 4, the inner shell 65 including the contact pins (not shown) is connected to the inner shell 4 b of the scope cable 4 by the connecting means 105. The internal shell 4d on the video processor 5 side is connected to the internal shell 5h provided on the video processor 5 at the same potential by the connection means 106. Scope cable 4
Cable 33, signal line 63, GN provided inside
The signal line for transmitting the signal of the D line 64 is covered with a shield body 4e on the outer periphery. The shield body 4e is connected to the inner shells 4b and 4d of the scope cable 4 at the same potential by the connection means 101. Have been.

Further, an inner shell 5h provided in the video processor 5 is provided with a patient GN of a patient circuit 5b provided in a floating state from an outer frame of the video processor 5.
D5c.

On the distal end side, the video GND provided on the SID 32 is extended in a pattern on the circuit board 48, and the outer conductor 3 of the coaxial wires 33a, 33b is
3c is connected to the video GND. Then, these outer conductors 33c pass through the exterior metal body and to the patient GND 5d in the video processor 5 via electric contacts (not shown) in the inner shell 65 and the inner shell 4b, and in the inner shell 4d and the inner shell 5h. It is connected.

As described above, the GND line 64 extending from the contact of the switch 19a is connected to the patient GND 5f in the video processor 5, and the shields 63a, 64a
Is connected to the patient GND 5e in the video processor 5.

In the electrical contact connector section 11, the inner shell 65 is connected to the outer shell 61 at the same potential by connecting means 102.

The outer shells 61, 4a, 4c, 5g of the electrical contact connector 11, the scope cable 4, and the processor connector 5a of the video processor 5, respectively.
Is connected to the video processor 5 and is floating from the exterior frame of the video processor 5.

With the above configuration, the exterior metal body is connected to the patient GN.
D is connected to the same potential.

The details of the tip will be described with reference to FIG. The SID 32 is attached to the distal end portion 12 of the electronic endoscope 2 as described above.
Is provided. And
In the imaging unit 47, the SID 32 is provided in the SID holder 38 in a state where a cover glass 32c is attached in front of the SID 32. The SID 32 has a SID drive lead 32a extending toward the base end of the electronic endoscope. The coaxial cable 33a branched from the SID cable 33 is connected to the SID drive lead 32a. SID drive lead 3
2a is, for example, a horizontal transfer pulse for driving the SID 32;
Terminal for vertical transfer pulse. In particular, the horizontal transfer pulse has a high driving frequency of about 10 MHz, which causes radiation noise.

On the other hand, the SID 32 is provided with a video signal output lead 32b. The video signal output lead 32b is connected to a circuit board 48 on which a video signal amplifying IC 48a and electronic components 48b constituting a circuit are mounted. The circuit board 48 is provided with a land 48c having the same potential as the video GND of the SID32.

The SID cable 33 is provided on the circuit board 48.
Is connected, and the coaxial line 33b transmits the video output signal amplified by the video signal amplifying IC 48a to the processor 5. All the outer conductors 33c of the coaxial wires 33a and 33b are collectively connected to a land 48c on the circuit board 48. The SID cable 33 is provided with an overall shield 33d that covers the outer periphery of the coaxial cable. The distal end of the overall shield 33d is arranged in the imaging unit 47 so as not to have the same potential as the video GND of the SID32. A shield member 49 extends on the base end side of the SID holder 38, and a covering member 50 is provided on the outer periphery thereof. SID cable 3
3 is provided with a cable hogo 51 for coating protection, which is fixed to the coating member 50 by coating. Shield member 4
9 is filled with, for example, an epoxy resin 52.

A conductive adhesive 53 is connected between the land 48d of the same potential as the video GND on the circuit board 48 and the shield member 49 at the same potential.

As described above, the horizontal transfer pulse causes radiation noise, and it is necessary to improve the shielding of the signal line transmitting the horizontal transfer pulse in order to suppress the radiation noise.

Therefore, in the coaxial line 33a, as shown in FIG. 4, the outer periphery of the inner conductor 33e is covered with a dielectric 33f. As the internal conductor 33e, for example, a copper alloy wire tinned is used. The plating may be silver plating having high conductivity. As the dielectric 33f, for example, a Teflon-based resin is used. A first outer conductor 33g is provided on the outer periphery of the dielectric 33f. The first outer conductor 33g is made of the same material as the inner conductor 33e. First outer conductor 3
A second outer conductor 33h is provided on the outer periphery of 3g. As the second outer conductor 33h, a polyester tape obtained by evaporating aluminum or copper is used. At this time, aluminum deposition or copper deposition is performed on at least the first outer conductor 3.
It is provided on the surface in contact with 3 g. It may be provided on both sides of the polyester tape. A jacket 33i using Teflon-based resin is provided on the outer periphery of the second outer conductor 33h.

The observation optical system 31 includes an objective lens group 37 inside the first and second objective lens frames 34 and 35 and the insulating member 36.
And is arranged in the observation window 23. Observation optical system 31
Is provided in a state in which the second objective lens frame 35 is focused and fixed to the SID holder 38. Further, the observation optical system 31 is fixed to the distal end body 39.

The illumination lens 40 constituting the illumination window 22 provided at the distal end portion 12 is housed in an illumination lens frame 41, and the gold end 42a is inserted into the main body 42 with the light guide fiber 42b inserted into the gold end 42a. It is fixed to 39. The light guide fiber 42b includes a protective member 42.
c is coated.

The first piece 43 of the bending portion 13 is electrically connected to the tip body 39 by the connecting means 95 at the same potential. Connecting means 95
For example, fastening means using screws is used. In the bending portion 13, the joints of the plurality of metal bodies are fixed by a metal member (not shown) by a shaft 43a after the first piece 43. Further, a non-conductive cover member 44 is provided at the forefront, and the insertion portion 7 is covered with a covering member 45, and the outermost periphery thereof is covered with a non-conductive exterior resin 46.

With the above configuration, the SID cable 33
The outer conductor 33c has the same potential as the video GND, and the distal end metal body 12a and the bent portion metal body 13a are connected to the same potential.

As shown in FIGS. 5 and 6, in the electrical contact connector section 11, a contact pin holding member 71 is incorporated in the inner shell 65, and a contact board 72 is connected to one end thereof. The contact board 72 is screwed into the inner shell 65 in which the contact board fixing member 73 is positioned by the positioning pin 89, and is fixed by the contact portion 73a. A pressing member 74 is provided between the outer shell 61 and the inner shell 65, and when the contact board fixing member 73 is screwed and fixed to the inner shell 65, the pressing member 7 is fixed.
4 is pressed against the contact portion 75. This ensures that the contact board fixing member 73 is securely connected to the inner shell 65.
Can be conducted.

The contact tube fixing member 73 includes a shield cylinder 7
6, and a shield lid 77 is fixed to the shield cylinder 76 with a fastening member 77a. SID cable 3
3. The signal line 63 and the GND line 64 are guided into the shield tube 76 from the opening 77b of the shield lid 77 via the inside of the electronic endoscope. S guided into the shield tube 76
The ID cable 33, the signal line 63, and the GND line 64 are connected to the overall shield 33d and the shield 63 near the opening 77b.
a, 64a are exposed.

On the other hand, the contact pin holding member 71 holds
One end of a jumper wire 79 is connected to the end 78b of the contact pin 78 fixed to the contact board 72 by soldering 78a. The other end is collectively connected to the SID cable 33 and the exposed portion (collective portion) 80 of the shield bodies 63a and 64a. The collective portion 80 is connected to the shield collective terminal 81 and is fixed to the shield lid 77 by a tongue member 82. .

When the contact pin 78 is connected to the video processor 5 via the scope cable 4, the patient GND 5e
, The inner shell 65 is connected to the patient GND 5e (see FIG. 3). The inner shell 65 is connected to the outer shell 61 at the same potential by the connecting means 102. With this configuration, the outer shell 61 and the patient GND5
e is connected to the same potential.

The signal line 33a for transmitting the horizontal transfer pulse is
It is connected to a contact pin 83 having a coaxial structure via a noise reducer 84. Thus, noise radiated from the horizontal transfer pulse can be reduced.

The signal line 63 transmits the active signal of the switch, and is connected to the contact pin 85. The signal line 86 is a DC power supply line supplied from the light source device 3 and is connected to the contact pin 88 via the noise reducer 87 so that the radiation from the horizontal transfer pulse does not propagate to the signal line 86 and radiate. Is done. As the noise reducer 87, a ferrite core, a coil, or the like is used.

As shown in FIG. 7, in the contact board 72, a pattern 72a is provided all around the outer periphery of the contact board 72. The contact board 72 is fixed to the contact board fixing member 73.
When the contact portion is fixed, the contact portion 73a is fixed in a state of being electrically connected to the pattern 72a. The contact pin 78 is, for example, a patient GND (total shield) land 72b and a contact pin land 72d, and the coaxial contact pin 83 is a coaxial contact pin fixing portion 72.
e.

As shown in FIG. 8, the lands 72f of the contact pins 78 connected to the patient GND at the same potential are connected to the patient GND.
(Overall shield) The lands 72b and the through holes are connected to the same potential, and have the same potential as the solid GND region 72c. As a result, the area of the patient GND on the contact board 72 is set large.

As shown in FIG. 9, the scope connector 1
0, the scope connector metal part 10a is composed of connector cases 111 and 112, and the connector case 11
The reference numerals 1 and 112 are connected to the same potential by the snap members 113 and 114. In the electrical contact connector section 11, the shield tube 76 constituting the configuration is accommodated in the contact connector accommodating section 115, and the outer shell 61 is connected to the connector case 111 at the same potential by the connection means 100 in the outer shell outer peripheral section 61a. . The contact pin 116 is connected to a DC power supply line when the electronic endoscope 2 is connected to the light source device 3, and is transmitted to the inside of the shield cylinder 55 by a signal line 86.
A terminal 117 for a leakage current feedback circuit when connecting the high-frequency ablation device is connected to an exterior metal body in an operation unit (not shown) by a jumper wire 118. Further, the universal cord part metal body 9a connected to the scope connector part metal body 10a is connected to the block member 119 by the connector case 11
2 are connected to the same potential by a tongue member 120 for fastening the second member 2 and the connecting means 99. The connection means 99 is formed by fastening screws, for example. As a result, a conductive line indicated by reference numeral 121 is obtained.

In the description of FIGS. 5 to 9, the patient GN
D, inner shell 65, outer shell 61, scope connector metal body 10a, and universal cord metal body 9a
Are connected to the same potential.

In the vicinity of the operation unit 8, as shown in FIG. 10, the flexible tube metal body 14a of the flexible tube 14 has a metal spiral tube 14b and a metal blade 14c fixed to the base 14d at the same potential. Consists of a configuration.

The operation part metal body 8a is connected to the connecting members 130, 1
32, a frame connecting member 133, and a frame 134. The metal blade 14c and the connecting member 130 are connected to the connecting means 9
7 are connected to the same potential. The connecting member 130 and the connecting member 132 are fixed to the same potential by the contact member 131 at the contact portion 131a. The connecting member 132, the frame connecting member 133, and the frame 134 are also connected to the fastening members 137, respectively.
a and 137b are connected to the same potential. Frame 13
4 to the universal cord metal body 9a, connecting means 9
8 are connected to the same potential. The connecting means 98 is formed by fastening screws, for example.

Although not shown, the flexible tube portion metal body 14a
The bending portion metal body 13a has the same configuration as the above, and is connected to the bending portion metal body 13a at the same potential by connection means 96 by fastening screws, for example.

According to the description of FIG.
a, the flexible tube part metal body 14a, the operation part metal body 8a, and the universal cord part metal body 9a are connected to the same potential.

When the electronic endoscope 2 and the video processor 5 are connected and driven, the frequency of the horizontal transfer pulse in the drive signal of the SID 32 is as high as about 10 MHz, which causes radiation noise. The noise generated from the coaxial signal line transmitting the horizontal transfer pulse is radiated from the outer metal of the electronic endoscope 2 to the outside.

According to the above-described configuration, the outer metal members constituting the electronic endoscope 2 are connected to each other at the same potential, and the inner shell 65 and the patient GND in the electrical contact connector portion 11 are connected.
Are connected to the same potential, and the outer shell 61 and the inner shell 6
By connecting 5 to the same potential by the connecting means 102, the entire exterior metal of the electronic endoscope 2 is connected to the same potential as the patient GND.

Thus, the noise radiated from the exterior metal flows to the patient GND, and the noise radiated to the outside is suppressed.

Further, by providing the outer conductor of the signal line transmitting the horizontal transfer pulse twice, the shielding property of the coaxial line transmitting the noise source is improved, and the noise radiated to the outside is suppressed.

The radiated noise level can be suppressed, and the intrusion noise can be reduced by the configuration of the present invention.

[Supplementary Note] (Supplementary note 1) An electronic endoscope having a built-in solid-state imaging device at the distal end of the insertion portion and a video processor having a circuit for processing input / output signals of the solid-state imaging device. In the endoscope apparatus, a plurality of conductive members arranged in the electronic endoscope are connected to one another in series at the same potential, and the potential of the conductive members is set in the video processor. An electronic endoscope device comprising a connection means for setting the same potential as GND of a circuit.

(Appendix 2) The electronic endoscope apparatus according to appendix 1, wherein the connection means is provided in a contact connector section of the electronic endoscope connected to the video processor. .

(Supplementary Note 3) The electronic endoscope includes a built-in image pickup unit having the solid-state image pickup device and a coaxial line for transmitting / receiving input / output signals of the solid-state image pickup device to / from a video processor. 3. The electronic endoscope apparatus according to claim 1, wherein the outer conductor is configured as a double shield.

(Supplementary Note 4) The electronic endoscope includes a built-in image pickup unit having the solid-state image pickup device and a coaxial line for transmitting / receiving an input / output signal of the solid-state image pickup device to / from a video processor. 3. The electronic endoscope according to claim 1, wherein the outer conductor is formed as a resin tape layer in which a first layer is formed of a stranded metal wire and a second layer is formed by depositing a highly conductive metal. Mirror device.

(Additional Item 5) The electronic device according to additional item 2, wherein a board is built in the contact connector portion, and a wide conductive pattern having the same potential as GND of the patient circuit is provided on the board. Endoscope device.

(Additional Item 6) An electronic endoscope having a built-in solid-state image sensor at the distal end of the insertion section, and a video processor having a circuit for processing input / output signals of the solid-state image sensor are provided. An electronic endoscope apparatus having a transmission cable in which a shield member for covering the outside of a cable or the like is arranged, wherein at least the exterior and the shield member of the transmission cable have the same potential.

(Supplementary Note 7) The electric potential of the exterior and the shield member of the transmission cable are set to the same electric potential, and the electric potential is set to the same potential as GND of the patient circuit provided in the video processor and floating with the ground. 8. The electronic endoscope apparatus according to claim 7, wherein

(Appendix 8) In a signal cable for transmitting an input / output signal to / from a solid-state image pickup device of an image pickup unit built in an electronic endoscope, an outer conductor of the signal cable is configured as a double shield. Characteristic signal cable.

(Supplementary Note 9) In a signal cable for transmitting input / output signals to / from a solid-state image pickup device of an image pickup unit built in an electronic endoscope, the first outer conductor of the signal cable is made of a metal wire. A signal cable comprising a wire and a second layer formed of a resin tape layer on which a highly conductive metal is deposited.

[0071]

As described above, according to the electronic endoscope apparatus of the present invention, the connecting means connects the plurality of conductive members provided in the electronic endoscope to the same potential in series and ,
Since the potential of the conductive members is set to the same potential as GND of the patient circuit provided in the video processor, radiation of noise from the electronic endoscope having the solid-state imaging device and intrusion of noise from the outside are surely reduced. There is an effect that can be made.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an electronic endoscope apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration near the distal end of the electronic endoscope in FIG. 1;

FIG. 3 is a configuration diagram showing a configuration of an electric system of the electronic endoscope in FIG. 1;

FIG. 4 is a configuration diagram showing a configuration of a coaxial line of the SID cable of FIG. 2;

FIG. 5 is a sectional view showing the configuration of the electrical contact connector section of FIG. 1;

FIG. 6 is an enlarged view showing details of a portion C in FIG. 5;

FIG. 7 is a view of the contact portion substrate of FIG.

FIG. 8 is a view of the contact portion substrate of FIG.

FIG. 9 is a sectional view showing the configuration of the scope connector of FIG. 1;

FIG. 10 is a cross-sectional view showing a configuration near an operation unit in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic endoscope device 2 ... Electronic endoscope 3 ... Light source device 4 ... Scope cable 5 ... Video processor 6 ... Color monitor 7 ... Insertion part 7a ... Insertion part metal body 8 ... Operation part 8a ... Operation part metal body 9 ... Universal cord part 9a ... Universal cord part metal body 10 ... Scope connector part 10a ... Scope connector part metal body 11 ... Electric contact connector part 12 ... Tip part 12a ... Tip part metal body 13 ... Bending part 13a ... Bending part metal body 14 ... flexible tube portion 14a ... flexible tube portion metal body 31 ... observation optical system 32 ... SID 33 ... SID cable 47 ... imaging unit 48 ... circuit board 61 ... outer shell 65 ... inner shell 95 to 102, 105, 106 ... connection means

Claims (1)

[Claims] 1. An electronic endoscope device comprising: an electronic endoscope having a built-in solid-state imaging device at a distal end portion of an insertion portion; and a video processor having a circuit for processing input / output signals of the solid-state imaging device. A plurality of conductive members arranged in the electronic endoscope,
An electronic endoscope apparatus comprising: a connecting means for connecting the conductive members to the same potential in series and setting the potential of the conductive members to the same potential as GND of a patient circuit provided in the video processor.