JPH07313453A - Endoscope - Google Patents

Abstract

PURPOSE:To provide an endoscope transmitting signals with a flexible printed circuit board which is connected to a solid-state image pickup element, is inserted in the endoscope and has shieldability. CONSTITUTION:The band-shaped flexible printed circuit board 17 inserted in the hard endoscope is disposed with the CCD 13 on its front end side and is provided with an electronic parts-packaging region 21 on the rear side of this CCD 13. Various kinds of electronic parts 18, 18, 18... are packaged in this region. A both side shielded region part 22 provided with wiring patterns at the inside layer is disposed on the rear side of the electronic parts-packaging region 21. The rear end surface thereof is provided with the rear end part of a card edge structure exposed with plural electric contacts 19a, 19a, 19a... corresponding to the respective terminals of the CCD 13 and contacts 19s, 19s for shielding formed broader than these electric contacts 19a at prescribed pitches. The electronic parts-packaging region part 21 is provided with a parts- shielding region part 23 winding the electronic parts-packaging region part 21 in its side part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope provided with a solid-state image pickup device.

[0002]

2. Description of the Related Art Conventionally, when an endoscope that has been used once is reused, a sterilization process or the like has been performed in order to prevent an infection caused by the endoscope. However, the gas sterilization work using EOG or the like for surely sterilizing the used endoscope takes time, and it is necessary to prepare a plurality of expensive endoscopes in order to cope with an urgent patient. And, the financial burden was heavy.

An autoclave (pressurized steam sterilizer)
Therefore, for example, when steam heat sterilization is performed for 5 minutes in an atmosphere of 135 ° C. and 2.2 atm, the resistance of electronic parts and the like built in the endoscope is not sufficient, which causes a defect. It was

Therefore, in an endoscope which is inserted into a body cavity through the oral cavity, a cover system endoscope in which the endoscope is composed of an endoscope for a cover and an endoscope cover for covering the endoscope for a cover is used. A mirror has been proposed. This cover type endoscope is
Cover the sterilized cover endoscope with the sterilized endoscope cover, and insert the cover endoscope covered with this endoscope cover into the body cavity of the patient for inspection and treatment. After performing the inspection / treatment, remove the endoscope cover from the cover endoscope and discard it, and attach a new sterilized endoscope cover to the cover endoscope and reuse it. This eliminates the need for cleaning and disinfecting the cover endoscope, and enables continuous use.

Further, the present applicant has proposed in Japanese Patent Application No. 5-40284 an endoscope provided with an inexpensive and disposable insertion portion which is percutaneously inserted into the abdominal cavity through a trocar, for example. There is. The endoscope includes an illumination optical system for illuminating a subject, a solid-state image sensor, an observation optical system for forming a subject image on the solid-state image sensor, and a signal for transmitting an electric signal of the subject image of the solid-state image sensor. A rigid endoscope in which a cable, a signal connector for transmitting the electric signal, and an illuminating light connector for illuminating light transmission are integrated with a resin member to have an insertion portion shape.

However, in the rigid endoscope and the like, the signal cable for transmitting the electric signal of the subject image formed on the solid-state image pickup element is relatively expensive, and this signal cable and the solid-state image pickup element arranged on the endoscope are relatively expensive. Also, the connection work with the signal connector is troublesome and takes time. Therefore, JP-A-62-1
As shown in Japanese Patent No. 13123, it is conceivable to insert a flexible printed board on which electronic parts can be mounted instead of the signal cable inserted through the endoscope.

[0007]

However, since the shielding property is not taken into consideration only by connecting the solid-state image pickup device and the signal connector with the flexible printed circuit board, the electronic components mounted on the flexible printed circuit board have no radio wave. It is easily affected by obstacles, and particularly in the case of surgery used in combination with a high-frequency knife, the observed image may be disturbed due to the effect of high-frequency noise generated from the high-frequency knife, making it difficult to observe.

The present invention has been made in view of the above problems, and is connected to a solid-state image pickup device and inserted through an endoscope,
It is an object of the present invention to provide an inexpensive endoscope that transmits a signal by a flexible printed circuit board having a shielding property that is not affected by noise.

[0009]

In the endoscope of the present invention, a solid-state image pickup device is used as an image pickup means of the endoscope, and an electronic component can mount an electric signal of a subject image formed on the solid-state image pickup device. An endoscope for transmission via a flexible printed circuit board, wherein electronic parts and signal lines mounted on the flexible printed circuit board are covered with a shield region provided on the flexible printed circuit board.

[0010]

According to the present invention, a flexible printed circuit board connected to a solid-state image pickup device and having a portion on which electronic components are mounted covered with a shield region is inserted into an endoscope,
A signal is transmitted via a wiring pattern provided on this flexible printed board without being affected by noise.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 relate to an embodiment of the present invention.
2 is a diagram showing a schematic configuration of an endoscope, FIG. 2 is a sectional view showing a schematic configuration of a rigid endoscope, FIG. 3 is a diagram showing a circuit configuration inside a rigid endoscope, and FIG. FIG. 5 is a plan view showing a schematic configuration of a flexible board to be arranged, FIG. 5 is a plan view showing a state in which an electronic component mounting area of the flexible printed board is covered with a shield area, and FIG. 6 is an electronic component mounting area of the flexible printed board. It is sectional drawing which shows the state covered with the shield area | region part.

As shown in FIG. 1, an endoscope system 1 of the present embodiment includes a disposable rigid endoscope (hereinafter abbreviated as rigid endoscope) 2 having an illumination optical system and an observation optical system built therein, and this rigid endoscope. Light source device 3 for supplying illumination light to the illumination optical system of the endoscope 2.
And a camera control unit (hereinafter abbreviated as CCU) 4 which is a signal processing means for processing various signals used in the solid-state image pickup device arranged at the distal end of the rigid endoscope 2, and a solid-state image pickup device from the solid-state image pickup device to the CCU 4. The monitor 5 is configured to display an image signal generated by processing the signal sent thereto.

The rigid endoscope 2 and the light source device 3 are detachably connected by a light guide cable 6, and the rigid endoscope 2 and the CCU 4 are detachably connected by a relay cable 7. Has become.

As shown in FIG. 2, the rigid endoscope 2 has an illumination optical system (not shown) facing the light guide 11 and an observation optical system 14 in which an objective lens group 12 and a CCD 13 as a solid-state image sensor are arranged. It is provided in.

Further, at the rear end side of the rigid endoscope 2, the signal connector 15 into which the projection 7b of the endoscope side connector 7a of the relay cable 7 is inserted and connected, and the illumination to which the light guide cable 6 is connected. Connector 16 is provided. The CCD 13 and the signal connector 15 are inserted into the rigid endoscope to form a flexible printed circuit board 17.
Are electrically connected by.

As shown in FIG. 3, the CCD 13 provided in the rigid endoscope 2 has, for example, vertical transfer clock terminals VΦ1, VΦ2, VΦ3, VΦ4 and horizontal transfer clock terminals HΦ1, HΦ2, or Vout. , GND, V
Each terminal such as DD is provided, and each of these terminals is
Predetermined signal lines 20, 20, 20. of the wiring pattern provided on the flexible printed circuit board 17, respectively. ． ． It is connected to the.

The flexible printed circuit board 17 is also provided.
Various electronic components 18, 18, 18. ． ． Was implemented,
The terminals VΦ1, VΦ2, VΦ3, VΦ4 for the vertical transfer clock are provided on the rear end surface of the flexible printed board 17.
And horizontal transfer clock terminals HΦ1 and HΦ2, or a plurality of contact portions 19, 19, 19 corresponding to terminals such as Vout, GND, VDD. ． ． Contact part 19 for shields and shields
s, 19s are provided.

That is, as shown in FIG. 4, the rigid endoscope 2
Strip-shaped flexible printed circuit board 1 inserted inside
Reference numeral 7 denotes an electronic component mounting area 2 in which a CCD 13 is arranged on the front end side and a wiring pattern is formed on the rear side of the CCD 13.
1, and various electronic components 18, 18, 18. ． ． Has been implemented.

On the rear side of the electronic component mounting area portion 21, a double-sided shield area portion 22 having a wiring pattern formed in an inner layer is formed.
Are provided on the rear end surface of the double-sided shield area portion 22, and a plurality of electric contacts 19a, 19a, 19a. ． ． And this electrical contact 19
An end face of a flexible printed circuit board which can be connected to the signal connector 15 by a card edge structure is formed by exposing the shield contacts 19s, 19s formed wider than a at a predetermined pitch.

In addition, a wiring pattern portion 23a is formed on the front surface of the side portion of the electronic component mounting area portion 21, for example.
The component shield area portion 23 having the shield area portion 23b formed on the back side surface is provided.

The signal lines extending from the CCD 13 and the signal lines connected to the electronic components are the wiring pattern portions 2 of the electronic component mounting area portion 21 and the component shield area portion 23.
3a and the electrical contact 19, 19, 19 ,. ． ． It is connected to the.

Further, these shield regions are formed by providing a copper foil layer on the entire surface of a predetermined range.

Further, a soldering portion 23c is provided in the shield area portion 23b on the back side of the component shield area portion 23, and a soldering portion 22a is provided in the double-sided shield area portion 22 corresponding to the soldering portion 23c. There is.

Then, as shown in FIGS. 5 and 6, the electronic component mounting region 21 is wound around the component shield region 23, and the soldering portions 23c of the component shield region 23 and the double-sided shield region 22 are soldered. The solder 25 is poured into the attachment portion 22a and fixed integrally by soldering and disposed in the endoscope.

In this way, the CCD and the signal connector are connected by the flexible printed circuit board, and the electronic component mounted on the electronic component mounting area of the flexible printed circuit board is provided on the back side of the component shield area. Since the signal line extending from the electronic part mounting area part is wound around the area part and passes through the inner layer of the double-sided shield area part, various electric signals output from the CCU to the CCD and the objective lens group It is possible to transmit an electric signal of a subject image formed on the CCD via the flexible printed circuit board without being affected by noise. Then, by inserting this flexible printed circuit board into the endoscope, it is possible to provide an endoscope that is inexpensive and is not affected by noise.

Further, since the shield contact is formed wider than the other electric contacts, it is possible to surely contact the shield contact portion of the endoscope connector.

Although the component shield area portion is provided on the side surface of the electronic component mounting area portion, the component shield area portion may be provided as shown by the broken line in the figure.

Further, although it has been described as a disposable type rigid endoscope, it is needless to say that the present invention is not limited to a rigid endoscope and can be applied to a reuse type electronic endoscope.

[Additional Notes] 1. In the endoscope, a solid-state image sensor is used as an image pickup means of the endoscope, and an electric signal of a subject image formed on the solid-state image sensor is transmitted through a flexible printed circuit board on which electronic parts can be mounted. An endoscope that covers electronic components and signal lines mounted on the flexible printed circuit board with a shield region provided on the flexible printed circuit board.

2. The endoscope according to appendix 1, wherein the flexible printed circuit board includes an electronic component mounting area for mounting electronic components, a component shield area covering the electronic component mounting area, and a double-sided shield area.

3. The endoscope according to appendix 2, wherein a wiring pattern is provided on the inner layer of the double-sided shield area portion.

4. The endoscope according to Appendix 2, wherein the electrical contacts provided on the flexible printed circuit board have a card edge structure.

5. The endoscope according to appendix 4, wherein the shield contact is formed wider than the other electric contacts among the electric contacts.

[0034]

As described above, according to the present invention, it is possible to inexpensively transmit a signal by a flexible printed circuit board which is connected to a solid-state image pickup device, is inserted through an endoscope, and has a shielding property that is not affected by noise. The endoscope can be provided.

[Brief description of drawings]

1 to 6 relate to an embodiment of the present invention, and FIG. 1 is a diagram showing a schematic configuration of an endoscope system.

FIG. 2 is a cross-sectional view showing a schematic configuration of a rigid endoscope.

FIG. 3 is a diagram showing a circuit configuration inside a rigid endoscope.

FIG. 4 is a diagram showing a schematic configuration of a flexible substrate arranged in a rigid endoscope.

FIG. 5 is a plan view showing a state in which the electronic component mounting area of the flexible printed circuit board is covered with a shield area.

FIG. 6 is a cross-sectional view showing a state in which an electronic component mounting area of a flexible printed circuit board is covered with a shield area.

[Explanation of symbols]

 13 ... CCD 17 ... Flexible printed circuit board 19a ... Electrical contact 19s ... Shield contact 21 ... Electronic component mounting area 22 ... Double-sided shield area 23 ... Component shield area

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Akihiko Mochida 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Wataru Ono 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Ichiro Funabashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Masao Uehara 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Nobuyuki Sakamoto 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Hideki Koyanagi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A solid-state image pickup device is used as an image pickup means of an endoscope,
In an endoscope for transmitting an electric signal of a subject image formed on this solid-state image pickup device through a flexible printed circuit board on which electronic parts can be mounted, an electronic component and a signal line mounted on the flexible printed circuit board are printed by the flexible printed circuit board. An endoscope characterized by being covered with a shield region provided on a substrate.