JP4390313B2 - Processor for electronic endoscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a processor for an electronic endoscope.
[0002]
[Prior art]
A processor for an electronic endoscope is surrounded by a casing, but generally a connector, a socket, etc. (hereinafter referred to as “connectors”) for connecting to other devices, a power source, etc. are attached to the rear panel plate. Yes.
[0003]
FIG. 5 shows an AC input socket 90 provided on the back side of a conventional electronic endoscope processor for connection to a commercial power source, and a hole formed in a back panel plate 91 of the electronic endoscope processor. It is inserted from the outside into 92, and its flange 90 a is screwed and fixed to the back panel plate 91 with a screw (not shown) and is in pressure contact with the back panel plate 91. A frame body 90 b surrounding the outer surface of the AC input socket 90 is made of metal, and is directly connected to a ground wire 94 connected to the chassis 93.
[0004]
[Problems to be solved by the invention]
The rear panel plate 91 is made of a conductive metal plate, and its surface is mainly coated with a paint 91a for insulation, and the flange portion 90a of the AC input socket 90 is pressed from above. Therefore, there is almost no electrical conduction at that portion.
[0005]
As a result, the frame body 90a of the AC input socket 90 is in contact with the rear panel plate 91 only at the hole 92 portion, so that the contact state is unstable, and even if it is in contact, substantial contact is made. The area is small.
[0006]
Therefore, the grounding path 94 is the only reliable grounding path for the AC input socket 90. However, since there is a distance from the chassis 93 to the frame 90b and the cross-sectional area of the grounding line 94 is small, the impedance in this grounding path is reduced. Since it cannot be made sufficiently low and the shielding effect against the signal line built in the frame 90a of the AC input socket 90 cannot be sufficiently exhibited, noise radiation to the outside (or noise intrusion from the outside) at the AC input socket 90 portion. May occur.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a processor for an electronic endoscope that can enhance a shielding effect at a connector portion attached to a panel board.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an electronic endoscope processor according to the present invention is the electronic endoscope processor in which a connector having a metal frame is attached to a metal panel plate whose surface is coated. The portion of the surface of the panel plate where the connectors are pressed is not coated, and the metal frame of the connectors is brought into direct contact with the metal panel to be electrically connected to the metal panel. And
[0009]
The metal panel plate may be a back panel that covers the back of the electronic endoscope processor, and the metal frame of the connectors may be connected to a ground wire.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the electronic endoscope video processor 1 as seen from the back side. On the surface side of the video processor 1, a connector (not shown) of an electronic endoscope that captures an observation image with a solid-state imaging device and transmits the image as an electrical signal is connected. Supply etc. are performed.
[0011]
The rear panel plate 2 that covers the back of the video processor 1 is connected to an AC input socket 10 connected to a commercial power source, a communication connector 20 such as a D-sub connector connected to a recording device, etc., and a TV monitor or the like. A video output connector 30 such as a BNC connector is attached. In the AC input socket 10 and the communication connector 20, the ears formed in each are pressed and fixed to the rear panel plate 2 by fixing screws 19 and 29.
[0012]
FIG. 1 shows the AC input socket 10 portion. The AC input socket 10 is entirely surrounded by a metal frame 11 made of a conductive metal that is not surface-treated, and is passed through a hole 5 formed in the rear panel plate 2. The rear panel plate 2 is in electrical contact with the chassis 3 of the video processor 1 over a wide area.
[0013]
The metal frame 11 of the AC input socket 10 is connected to the chassis 3 of the video processor 1 by a ground wire 13. Reference numeral 14 denotes a power line. The flange 12 formed at the outer end of the AC input socket 10 is larger than the diameter of the hole 5 and is pressed against the surface of the rear panel plate 2 by a fixing screw 19.
[0014]
The back panel plate 2 is formed of a conductive metal plate such as iron or aluminum, for example, and the surface thereof is coated with a paint 4. However, the paint 4 is not applied to the portion of the AC input socket 10 where the flange 12 is pressed.
[0015]
Therefore, since the back panel board 2 and the AC input socket 10 have a wide contact area in that portion, they are connected with a lower impedance, and as a result, the AC input socket 10 exhibits a high shielding effect.
[0016]
FIG. 3 shows the communication connector 20 portion. The communication connector 20 is entirely surrounded by metal frames 21A and 21B made of conductive metal that has not been surface-treated, and is passed through a hole 6 formed in the back panel plate 2.
[0017]
The metal frames 21A and 21B of the communication connector 20 are connected to the rear panel plate 2 (and thus the chassis 3). Reference numerals 23 and 24 denote signal lines. The flange portion 22 formed in the intermediate portion of the communication connector 20 is larger than the diameter of the hole 6 and is pressed against the surface of the rear panel plate 2 by a fixing screw 29.
[0018]
The paint 4 is not applied to the surface portion of the back panel 2 where the flange portion 22 of the communication connector 20 is pressed. Therefore, since the back panel board 2 and the communication connector 20 have a wide contact area in that portion, they are connected with a lower impedance, and the communication connector 20 exhibits a high shielding effect.
[0019]
FIG. 4 shows the video output connector 30 portion. The video output connector 30 is surrounded by metal frames 31A and 31B made of conductive metal that is not surface-treated, and a hole in which a metal frame 31A having a male screw formed on the outer surface is formed on the rear panel plate 2. 7 and fixed by a fixing nut 39.
[0020]
The metal frames 31A and 31B of the video output connector 30 are connected to the rear panel plate 2 (and thus the chassis 3). Reference numeral 34 denotes a signal line, and 33 denotes a GND line connected to a substrate (not shown). A flange 32 formed in the middle portion of the video output connector 30 is larger than the diameter of the hole 7 and is pressed against the surface of the rear panel plate 2 by a fixing nut 39.
[0021]
The paint 4 is not applied to the surface portion of the back panel 2 where the collar portion 32 of the video output connector 30 is pressed. Therefore, since the back panel board 2 and the video output connector 30 have a wide contact area in that portion, they are connected with lower impedance, and the video output connector 30 exhibits a high shielding effect.
[0022]
In addition, as an operation | work which forms the part by which the coating material 4 is not applied to the surface of the back panel board 2, you may mask those parts in a coating process, or after coating the back panel board 2 whole once. Alternatively, the paint may be removed mechanically or chemically only in necessary portions.
[0023]
【The invention's effect】
According to the present invention, the portion of the surface of the metal panel plate where the connectors are press-contacted is not coated, and the metal frame of the connectors is brought into direct contact with the metal panel to be electrically connected to the metal panel. Because the panel board and the connectors are electrically connected with a wide contact area and can be connected with a lower impedance, the shielding effect at the connector parts attached to the panel board can be enhanced, A great prevention effect against noise emission and penetration can be exhibited.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an AC input socket portion according to an embodiment of the present invention.
FIG. 2 is a perspective view seen from the back side of the video processor according to the embodiment of the present invention.
FIG. 3 is a side sectional view of a communication connector portion according to the embodiment of the present invention.
FIG. 4 is a side sectional view of a video output connector portion according to the embodiment of the present invention.
FIG. 5 is a side sectional view of a conventional AC input socket portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Video processor 2 Back panel board 3 Chassis 4 Paint 5, 6, 7 hole 10 AC input socket 11,21A, 21B, 31A, 31B Metal frame 12,22,32 Gutter part 13,33 Ground wire 20 Communication connector 30 Image | video Output connector

Claims (3)

In an electronic endoscope processor in which a hole is formed in a metal panel plate whose surface is coated, and a connector or socket having a metal frame is attached in a state of being passed through the hole .
The metal frame includes a portion that passes through the hole and a flange larger than the hole, and the flange is pressed against the surface of the metal panel plate.
The portion of the surface of the metal panel plate where the collar portion of the metal frame is pressed is not coated, and the collar portion of the metal frame is brought into direct contact with the metal panel itself to electrically connect with the metal panel. A processor for an electronic endoscope characterized by being made conductive. 2. The electronic endoscope processor according to claim 1, wherein the metal panel plate is a back panel that closes a back surface of the electronic endoscope processor. The processor for an electronic endoscope according to claim 1 or 2, wherein the metal frame of the connectors is connected to a ground wire.

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