JPH04197333A - Wiring structure of electronic endoscope device - Google Patents

Abstract

PURPOSE:To effectively prevent the mixing of noise from a driving unit by forming a part of an outside device case to a double form through a metal plate and allowing a signal wire to pass through the inside of the double case. CONSTITUTION:The bottom of a device case 10 is formed to a double bottom, and the double bottom is formed from the first and second bottom plates 11 and 12 made of iron or aluminium. A signal wire 5 is laid in the space between the first and second bottom plates 11 and 12, and a signal wire 5 wired between a unit connector 3a and a connector receiving part 4 is led to the under-side of the first bottom plate 11 by the opened ports 11a and 11b opened on the first bottom plate 11. Accordingly, the electromagnetic obstruction generated from a noise source in a driving unit 2 can effectively be shielded by the first bottom plate 11, and the deterioration of the image quality due to the mixing of noise to the signal wire 5 and the erroneous operation can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic endoscope apparatus, and particularly to the configuration of an apparatus that uses a solid-state image sensor to image the inside of a subject.

[Prior Art] An electronic endoscope device that displays images inside the body to be observed on a monitor is an electronic endoscope (electronic scope) that is inserted into the body to be observed.
For example, a CCD (Char
ge Coupled Device)
The video signal obtained by this COD is supplied into the main body and subjected to image processing.

FIG. 3 shows the configuration of a conventional device. Inside the device case 1 of the external device, there is a drive unit 2 that performs various drives such as light irradiation and washing water supply, and a drive unit 2 that performs various drive controls and video signal control. A processor unit 3 for processing is provided, and a connection section 2 for connecting an electronic endoscope is provided on the front side of the drive unit 2.
A is provided. Also, on the front of the device case 1,
A connector receiving part 4 for inputting and outputting electrical signals is attached,
A signal line 5 is wired to this connector receiving portion 4 from the unit connector 3a of the processor unit 3.

The connection plug 6a of the electronic endoscope 6 is connected to the connection part 2a of the drive unit 2, and the connector 6b of the signal cable is connected to the connector receiving part 4. Therefore, signals are transmitted and received between the processor unit 3 and the electronic endoscope 6 via the signal line 5, the connector receiver 4, the connector 5b, etc. A video signal can be obtained from the COD with = 2-.

[Problems to be Solved by the Invention] However, in the conventional device, there were problems such as noise being mixed into the signal line 5 due to electromagnetic interference generated in the drive unit 2, and the image being distorted. That is, the drive unit 2 houses a color wheel drive device for rotationally driving a color filter of RGB color light, a light source device, a drive device for supplying cleaning water and air, etc. Voltages of several thousand volts can be generated instantaneously. In contrast, the signal flowing through the signal line 5 is approximately several hundred mvolts. Therefore, when the drive unit 2 is driven, noise is generated on the signal line 5 that passes near the drive unit 2.
This noise signal causes malfunctions and disturbances in captured images.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic endoscope device that can effectively prevent noise from entering the drive unit.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an electronic endoscope inserted into a subject, and connects the electronic endoscope and a circuit in an external device by a signal line. In the wiring structure of the electronic endoscope device to be connected to the electronic endoscope device, a part of the external device case is formed double with a metal plate interposed therebetween, and the signal line is passed through the double case. do.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a perspective view of an electronic endoscope device according to an embodiment, and as in the conventional case, a drive unit in which various drive devices such as a color wheel drive device are built into the device case 10 is shown. 2 is provided, and a processor unit 3 that performs signal processing is provided on the rear side of this drive unit 2. This processor unit 3 supplies a control signal to the COD disposed at the tip of the electronic endoscope, and also inputs the video signal obtained by the CCD and performs signal processing for image display, such as signal level. It performs processing such as amplification, γ correction, and color signal formation, and contains circuit boards for this purpose. The drive unit 2 and processor unit 3 described above are housed in a metal case for noise shielding.

Further, on the front surface of the drive unit 2, as shown in FIG. A connector receiving portion 10a to which the connector 6b) is connected is provided.

In such a device, as also shown in FIG.
In the embodiment, the bottom of the device case 10 is a double bottom, and the double bottom is formed by a first bottom plate 11 and a second bottom plate 12 made of iron or aluminum. A signal line 5 is provided in the space between the first bottom plate 11 and the second bottom plate 12.
The signal wire 5 wired between the unit connector 3a and the connector receiving part 4 is connected to the underside of the first bottom plate 11 through openings 11a and llb made in the first bottom plate 11. be guided.

Therefore, electromagnetic disturbances generated from noise sources within the drive unit 2 can be effectively blocked by the first bottom plate 11, and it is possible to prevent deterioration of image quality and malfunctions due to noise intrusion into the signal line 5. .

In the embodiment, the drive unit 2 itself is made of a metallic shield case as described above, but by adding the configuration of the present invention, a high shielding effect can be obtained. Note that it is also possible to have only the configuration of the present invention without providing a shield case for the drive unit 2.

In the above embodiment, the bottom part of the case 10 has a double structure, but depending on the case, either the left or right sides may have a double structure and the signal line 5 may be passed through this. The second bottom plate 12 with a double bottom can be omitted if the bottom of the case is a double bottom due to the relationship with the plywood on which the device is placed.

[Effects of the Invention] As explained above, according to the present invention, a part of the external device case is formed in a double layer through a metal plate, and a signal cable is passed through the double case. By eliminating the influence of electromagnetic interference caused by the drive unit, noise is effectively prevented from entering the control signals and video signals transmitted between the electronic endoscope and the internal circuitry, and the image quality of the electronic endoscope system is improved. It becomes possible to provide good images.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the internal configuration of an electronic endoscope device according to an embodiment of the present invention, Fig. 2 is a sectional view of the embodiment device, and Fig. 3 is a diagram showing the internal structure of a conventional electronic endoscope device. FIG. 1.10...Device case, 2...Drive unit, 3
...Processor unit, 4...Connector receiving part, 5...Signal line, 11...
- First bottom plate, 12... second bottom plate.

Claims (1)

[Claims] (1) In the wiring structure of an electronic endoscope device that has an electronic endoscope inserted into a subject and connects this electronic endoscope and a circuit in an external device with a signal line, the external device case is 1. A wiring structure for an electronic endoscope device, characterized in that a part of the casing is formed double with a metal plate interposed therebetween, and the signal line is passed through the double casing.