JPH06105795A - Structure of circuit board accommodating part of electronic endoscope - Google Patents

Abstract

PURPOSE:To provide an easy-to-handle circuit board accommodation part by lessening slack of a lead within a metal case. CONSTITUTION:A metal case 26 to hold circuit boards 23, 24 is provided at the side face with openings 101, 102 through which leads 30 to the circuit boards go in and out, and a body case 18 is provided which accommodates the case 26, wherein an opening 200 to admit movement of the leads 30 is formed at the inserting foremost face of the metal case 26. This allows any lead 30 located opposite the accommodation hole 19 in the body case 18 to move within the opening 200 at the time of inserting and drawing out, and the leads 30 can be formed shorter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board housing portion structure in an electronic endoscope in which a tip portion is inserted into a body cavity or the like and internal observation is performed using a solid-state image pickup device.

[0002]

2. Description of the Related Art Electronic endoscope apparatuses used in the medical field and industrial field are well known. In this electronic endoscope apparatus, an electronic endoscope as a scope is connected to a light source device and an external processor device. It is composed. Then, when the irradiation light supplied from the light source device is introduced into the body to be observed, the image inside the body to be observed is a CCD (Charge Cou
It is captured by a pled device) and image-processed by an external processor, so that the inside of a body cavity such as a digestive tract can be observed on a monitor.

[0003]

By the way, the applicant of the present invention has proposed a CCD on the electronic endoscope side, for example, on the connector section or the operation section.
It has been proposed to provide a drive circuit for the, or a circuit for processing a video signal, etc., which enables signal processing tailored to the unique conditions and characteristics of individual electronic endoscopes. Has the advantage that

However, when the circuit board on which the processing circuit is mounted is attached to the electronic endoscope side, it is difficult to dispose and route the lead wires because the electronic endoscope itself adopts an airtight structure. There was a problem.

FIG. 6 shows a schematic structure of a connector portion of an electronic endoscope for connecting to a light source device and an external processor device, which has been proposed based on the prior art. As shown in the figure, a metal case 3 is accommodated in a main body case 1 through a storage port 2, a circuit board 4 is mounted in the metal case 3, and lead wires 5 and 6 are taken in and out on both side surfaces. There is a gap. Then, the lead wire 5 connected to the circuit board 4 is taken out from the gap on the right side surface and connected to the CCD at the tip end portion via the cable 7. Further, another lead wire 6 led out from the left side surface of the metal case 3 is connected to an external processor device via a cable 8. The member 9 in the figure is a light guide.

That is, in order to maintain the airtight state of the connector portion, the storage port 2 is provided only at one place, and the storage port 2 is provided on the lower side because of the arrangement of the light guide 9 and the like. Therefore, the lead wire 5 is exposed to the outside from the right side surface of the metal case 3. Then, when assembling, with the circuit board 4 partly exposed, the lead wire 5
Since it is necessary to connect the lead wire 5 or the metal case 3 is housed with the lead wire 5 connected to the circuit board 4, the lead wire 5 must be extra long as shown in the drawing.
Therefore, the lead wire 5 is loosened in the metal case 3 and is difficult to handle.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a circuit board housing structure of an electronic endoscope in which loosening of lead wires in a metal case is reduced and which is easy to handle. Especially.

[0008]

In order to achieve the above object, the structure of the circuit board housing portion of the electronic endoscope according to the present invention is as follows.
A case that holds the circuit board and has an opening formed in the side surface for receiving and inserting the lead wire to and from the circuit board, and the lead wire is arranged in a space that is formed in the direction opposite to the storage port when the case is stored. And an opening through which a lead wire can move when the case is taken in and out. Here, the opening on the side surface of the case may be provided at least on the side surface on which the opening of the insertion tip surface is formed.

[0009]

According to the above construction, when the case to which the circuit board is attached is housed in the main body, the lead wire is guided into the opening of the tip surface, so that the lead wire can be connected to the circuit board with a short lead wire. It will be possible. Moreover, there is less slack in the lead wire when the case is stored.

[0010]

1 and 2 show a metal case of a connector portion which is a circuit component housing portion of an electronic endoscope according to an embodiment, and FIG. 3 shows a configuration of the connector portion of the embodiment. , Fig. 4
Shows the connection state of the device by the above-mentioned connector portion, which will be described first with reference to FIG. In the figure, a connector portion 12 provided with a light guide 11 is connected to a light source device 10 for supplying irradiation light to a tip portion of an electronic endoscope, and a cable 13 connected to the connector portion 12 is connected by a connector 14. It is connected to the external processor unit 15.

On the other hand, an electronic endoscope is connected to the cable 16 connected to the connector portion 12, and the electronic endoscope is composed of an operating portion, an insertion portion, a bending portion, a tip portion, etc., as is well known. A CCD, which is a solid-state image sensor, is arranged at this tip. In the cable 16, a light guide 11 for guiding the light output from the light source device 10 to the tip portion is arranged, and a signal line for driving the CCD and transmitting a video signal is arranged. Line is connector part 12
Through the cable 13 to the external processor unit 15.

Next, referring to FIG.
Is a box-shaped main body case 18 made of a synthetic resin material, and a synthetic resin lid 20 that fits into a storage opening 19 on the bottom surface. The main body case 18 has an opening for connecting the cables 13 and 16 and a light source. Connection ring 21 for connecting to device 10
And the like are provided. Therefore, in the embodiment, the opening for accommodating the circuit components and the like is provided at one place for ensuring airtightness. Then, in the main body case 18, a metal case 26 in which two circuit boards 23 and 24 are attached by a supporting member is housed.
24 includes a CCD drive circuit and a video signal processing circuit, and the metal case 26 also functions as a noise shielding plate.

As shown in FIGS. 1 and 2, left and right openings 101 and 102 are formed on the side surface of the metal case 26, and various openings are formed from the openings 101 and 102 as shown in FIG. Lead wires 27 and 28 are guided to the outside. In addition, the light guide 1 described above is provided in the body case 18.
1, the lead wire 30 connected to the CCD is introduced from the inside of the cable 16, and the lead wire 30 is connected to the connector 31.
Are connected to the circuit boards 23 and 24. Then, as shown in FIG. 1, in the embodiment, an opening 200 is formed in the insertion front end surface of the metal case 26 from the end to the middle. Therefore, the lead wire 30 can move in the opening 200 when the case is taken in and out.

In FIG. 3, the metal case 26 is fixed to the stopper plate (metal plate) 33 that engages with the engagement groove 32 and the lid 20 with screws 34. With such a structure, the connector portion is formed. The airtight state of 12 is maintained.

According to the structure of the above-described embodiment, as shown in FIG. 5, when the metal case 26 is housed in the body case 18 or when the metal case 26 is taken out from the body case 18, the lead wire 30 is provided. It is possible to move to the opening 200 of the insertion tip surface. Therefore, at the shortest distance, the lead wire 30
Can be connected to the connector portion 31, and the lead wire 30 becomes shorter than in the case of the conventional lead wire 5 shown by the chain line. As a result, when the metal case 26 is housed, the slack of the lead wire 30 can be reduced and the handling becomes easy.

In the above embodiment, the opening 200 at the insertion tip surface is used.
The length of the opening 200 can be freely set depending on the arrangement state of the lead wire 30, the relationship with the metal case 26, and the like.
Although the left and right openings 101 and 102 formed on the side surface of the metal case 26 are formed in the entire area, the openings 101 and 102 may be formed on a part of the side surface.
Further, it is possible to eliminate the opening 102 on the left side of the drawing.

In the above-described embodiment, the case where the circuit board is housed in the connector portion 12 has been described. However, the present invention is applicable to a circuit board or the like provided in a place such as the operation portion of the electronic endoscope or the middle of the cable 16. It can be applied to the storage part.

[0018]

As described above, according to the present invention,
When the case holding the circuit board is housed in the main body, the lead wire is arranged in the space generated in the direction opposite to the housing opening, and an opening through which the lead wire can be moved when the case is taken in and out is formed in the insertion end surface of the case. Since it is formed, the length of the lead wire can be shortened. Therefore,
There is an advantage that the slack of the lead wire in the metal case is reduced and it is easy to handle.

[Brief description of drawings]

FIG. 1 is a perspective view showing a metal case of a connector portion which is a circuit board housing portion of an electronic endoscope according to an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a cross-sectional view of a connector portion of the electronic endoscope of the embodiment.

FIG. 4 is a diagram showing a connection state of the electronic endoscope apparatus.

FIG. 5 is a cross-sectional view showing a state in which the metal case is attached to and detached from the main body case.

FIG. 6 is a cross-sectional view showing a configuration of a conventionally proposed connector unit.

[Explanation of symbols]

 1, 18 ... Main body case, 3, 26 ... Metal case, 12 ... Connector part, 19 ... Storage port, 20 ... Lid, 23, 24 ... Circuit board, 101, 102 ... Side opening, 200 ... Insertion end surface opening .

Claims (1)

[Claims] 1. A case, which holds a circuit board and has an opening formed in a side surface for receiving and inserting a lead wire to and from the circuit board, and a space which is formed in a direction opposite to the housing opening when the case is housed. A main body on which a lead wire is disposed, and a circuit board housing structure of an electronic endoscope in which an opening through which the lead wire can be moved when the case is taken in and out is formed in an insertion front end surface of the case.