JP2986053B2 - Electronic endoscope connector with shield case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic endoscope connector, and more particularly to a structure in a connector provided with a shield case for electrically shielding an internal circuit.

[0002]

2. Description of the Related Art An electronic endoscope apparatus uses a charge coupled device (CCD) provided at the tip of the electronic endoscope.
An image of the inside of the body to be observed, such as the inside of a body cavity, is displayed on a monitor. The image signal obtained by the CCD is transmitted to an external processor, where it is subjected to image processing and supplied to the monitor. An electronic endoscope having such a CCD and an external processor device are connected by a connector, and a signal cable for transmitting an image signal and a circuit for adjusting an image signal level (a setup board, etc.) are provided in the connector. ) Is arranged.

FIG. 8 shows the structure of a conventional electronic endoscope connector. In a connector 1, a signal cable 2 connected to a CCD at the tip of the electronic endoscope is arranged in a connector case 3. Is established. The signal cable 2 is connected to a circuit board 5 which is a setup board disposed in a shield case 4, and a circuit member 6 for obtaining an image signal is mounted on the circuit board 5. 6 is finally connected to the terminal portion 7. This circuit board 5
Are held by holding members 8A and 8B having guide grooves. Here, the circuit member 6 and the printed wiring mounted on the circuit board 5 are separated from the shield case 4 by a predetermined distance. . In this way, the internal circuit of the connector is cut off from the outside by the shield case 4, thereby avoiding the influence of external noise or giving noise to the outside.

[0004]

In the conventional electronic endoscope connector, when the circuit member 6 on the circuit board 5 is exposed, first, the shield case 4 and the circuit board 5 are opened through the left opening in FIG. From the connector case 3 together with the terminal portion 7 and the like. Further, since the shield case 4 is integrated, the circuit board 5 must be further extracted from the shield case 4. Therefore, when adjusting the circuit on the circuit board (setup board) 5, there is a problem that this extraction work is complicated and takes time. Also, as described above, the shield case 4
In order to further extract the circuit board 5 from the shield case 4 after extracting the signal cable 2 from the connector case 3, the signal cable 2 becomes long and must be loosely disposed in the connector case 3 as shown in FIG. Therefore, it was inconvenient to manage the signal cable 2.

The present invention has been made in view of the above problems, and has as its object to expose a circuit member on a circuit board easily and in a short time, and to provide a signal cable disposed in a connector. To provide an electronic endoscope connector provided with a shield case capable of shortening the length of the conventional connector.

[0006]

According to a first aspect of the present invention, there is provided an electronic endoscope connector in which a shield case is arranged on an outer periphery of a circuit board in a connector. The shield body is separated into a shield body whose upper or lower surface is open, and a shield lid serving as a lid of the shield body, and the shield body and the shield lid are provided with fitting-type locking portions. I do.
The invention according to a second aspect is characterized in that a side surface of the shield body is
A concave portion for holding the circuit board is formed on the inner side, and a concave / convex portion having a predetermined length, which is a retaining convex portion on the outer side, is integrally formed. The shield lid body is engaged with the retaining convex portion of the shield body. An uneven portion having a stop recess inside is integrally formed. The invention according to a third aspect is characterized in that the connector case is provided with a concave portion for engaging the outer convex portion of the concave and convex portion of the shield lid and positioning the shield case itself.

[0007]

According to the first aspect of the present invention, the shield lid is easily detached from the shield body by releasing the engagement state of the locking portion, so that the circuit board is not taken out of the shield case. Thus, the circuit members on the circuit board can be exposed. Further, according to the second aspect, as the locking portion, the shield lid can be attached to and detached from the shield main body with one touch by the fitting type concave and convex portions formed on the side surfaces of the shield main body and the shield lid. The electrical connection between the two shield cases can also be improved. In addition, the circuit board can be held by the holding recess inside the shield main body, and two functions can be achieved by one configuration.

Further, a third case in which a recess is provided in the connector case is provided.
In the case of the present invention, the positioning of the shield case itself can be easily performed by engaging the outer convex portion of the concave and convex portion of the shield lid with the concave portion.

[0009]

FIG. 1 shows a shield case and a circuit board according to a first embodiment, FIG. 2 is a plan sectional view of an electronic endoscope connector according to the first embodiment, and FIG. 2, FIG. 4 is a front view of FIG. 2, FIG. 5 is a cross-sectional view taken along line VV of FIG. 2, and FIG. 6 shows an electrical connection state from the CCD to the circuit board in the connector. It is shown. The illustrated electronic endoscope connector 10 is a connector for connecting the electronic endoscope and an external processor device, and a signal cable 12 is provided in a case 11 of the connector 10 as in the case of FIG. Is done. The signal cable 12 is connected to a shield body (described later) and a circuit board 15 in the shield body 14 at a mounting portion 13. The circuit board 15 is a setup board for adjusting an image signal level in the embodiment.
A circuit member 16 for this is mounted.

[0010] As shown in FIG.
The upper surface is in an open state, and an uneven portion 18 protruding outward is integrally formed on the side surface thereof by embossing. A shield lid 20 is provided as a lid of the shield main body 14, and the lid 20 has an outer convex portion 18 of the uneven portion 18.
The concave-convex portion 21 fitted to B is also integrally formed. Accordingly, by fitting or releasing the concave portion 21A of the concave-convex portion 21 to the convex portion 18B of the concave-convex portion 18, the lid 20 and the shield body 14 can be attached and detached with one touch. Further, since the shield body 14 including the concave and convex portions 18 and the concave and convex portions 21 and the side surface of the lid 20 are tightly joined together, the shield main body 14 and the lid 20 are connected with low resistance.

Further, the uneven portion 18 of the shield main body 14
The concave portion 18A serves as a rail-shaped holding portion of the circuit board 15, and the circuit board 15 is guided by the rail-shaped concave portion 18A and attached to the shield body 14. Therefore, in the first embodiment, the uneven portion 18 of the shield case 14
The inner concave portion 18A serves as a holding portion of the circuit board 15, and the outer convex portion 18B serves as a locking portion with the lid 20. The circuit member 16 and the printed wiring of the circuit board 15 are attached at least a predetermined distance (about 2 to 3 mm or more) from the shield body 14 and the lid 20.

A ferrite (magnetic material) core 23 for removing high-frequency noise is attached to the signal cable 12, and the signal cable 12 is wound twice or more inside the ferrite core 23. The ferrite core 23 is fixed to a fixing member 24 with a band 25, and the fixing member 24 is connected to a mounting hole of the shield body 14. The shield body 14 and the lid 20 are connected to a contact piece spring 28 disposed in an opening 27 of the connector 10, and a terminal 29 is provided in the opening 27.

Further, as shown in FIG.
A concave portion 31 is provided on the inner surface of the connector case 11 corresponding to the shape of the convex portion 21B of the zero concave / convex portion 21. According to the concave portion 31, the shield body 14 and the lid 20 attached to the circuit board 15 can be guided into the connector case 11, and can be positioned and stored at a predetermined position.

In the circuit in the connector 10, the connection shown in FIG. 6 is implemented. That is, the optical system member 34 and the CCD 35 are connected to the distal end portion 33 of the electronic endoscope,
A plurality of signal lines 37 in the signal cable 12 are connected to the circuit board 36 of the CCD 35. This signal cable 12
Has a first shield line 38 on the outer periphery of the signal line 37, and a second shield line 40 is provided on the outer periphery of the first shield line 38 via an intermediate coating 39. Is connected to the ground (GND) of the circuit board 36. On the other hand, the distal end portion 33 is provided with a treatment instrument insertion channel 42, and an electric scalpel or the like is introduced into the treatment instrument insertion channel 42. In order to avoid the influence of noise from the electric scalpel or the like, furthermore, A copper foil plate 43 is disposed between the treatment tool insertion channel 42 and the CCD 35 and the circuit board 36 in order to ensure a withstand voltage for the patient. This copper foil plate 43 is connected to the second shield line 40.

On the connector side, the first
The shield wire 38 is connected to the ground (GND) of the circuit board 15, and the second shield wire 40 is connected to the shield main body 14 and the lid 20 via the mounting portion 13. As described above, the shield body 14 and the lid 20
Is connected to the contact spring 28.
Is ground (G) through a connector on the external processor device side.
ND). In the embodiment, the mounting portion 13,
The shield body 14, the lid 20, and the contact piece spring 28 are made of the same material, for example, stainless steel. According to this, the impedance is the same, so that the electrical characteristics can be improved.

According to such a connection structure, noise mainly generated by using an electric knife or the like causes the copper foil 43 or the second
The noise is prevented from flowing into the video signal by flowing from the shield wire 40 to the ground, and a predetermined withstand voltage is secured between the patient circuit such as the CCD 35 and the outer package at the distal end.

According to the structure of the first embodiment, the shield case in the connector 10 is separated into the shield main body 14 and the shield lid 20, and both are locked by the concave and convex portions 18 and 21. Therefore, the lid 20 can be attached to and detached from the shield body 14 with one touch. Therefore, by removing the lid 20, the circuit member 16 of the circuit board 15 can be easily exposed, and the circuit portion can be adjusted without pulling out the circuit board 15 from the shield case. In addition, according to the uneven portions 18 and the uneven portions 21 on the side surface portions, since they are firmly connected in a wide area, there is an advantage that a reliable electrical connection between the shield body 14 and the lid 20 can be achieved.

In addition, since it is not necessary to pull out the circuit board 15 from the shield body 14 at the time of circuit adjustment, etc.,
The signal cable 12 can be shortened, and the routing of the signal cable 12 in the connector case 11 becomes easy. Further, in the first embodiment, the uneven portion (convex portion) 21 of the shield lid 20 can be used as a positioning member for the connector case 11, and there is an advantage that efficient assembly is possible.

FIG. 7 shows the configuration of a second embodiment of the present invention. In the second embodiment, a rail-shaped holding member 46 is provided inside both sides of the shield body 45, and the circuit board 15 is slidably held by the holding member 46 as shown in the figure. A shield lid 47 is provided so as to cover the upper surface of the shield main body 45. The lid 47 has a locking portion 48 formed by bending the lower end of the side portion inward. Reference numeral 48 is fitted to a corner between the side surface and the bottom surface of the shield body 45. Also in such a second embodiment, the shield member 47 can be removed from the shield body 45 to expose the circuit member 16 on the circuit board 15.

In the above embodiment, the shield lids 20, 47
Is shown on the upper surface side of the shield main bodies 14 and 45, but the shield lid can be arranged on the lower surface side.

[0021]

As described above, according to the first aspect of the present invention, the shield case in the connector is separated into a shield body and a shield lid whose upper or lower surfaces are open, With the fitting type locking part, the circuit members on the circuit board can be exposed easily and in a short time just by removing the shield lid, and the circuit can be adjusted efficiently. Becomes In addition, there is an advantage that the signal cable disposed in the connector can be shorter than before.

According to the second aspect of the present invention, the shield body is provided with an uneven portion on the side surface of the shield body and the shield lid, and the circuit board is held by the inner concave portion of the uneven portion of the shield body. As a result, it is possible to hold the circuit board and connect the shield body and lid with one configuration.
The number of parts can be reduced. Further, the lid can be attached to and detached from the shield main body with one touch, and the electrical connection between them can be improved.

Further, according to the third aspect of the present invention, the connector case is provided with a concave portion which engages with the convex portion of the concave and convex portion of the shield lid so that the shield case itself can be guided and positioned. There is an advantage that assembly or removal of the shield case is simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a shield case and a circuit board of an electronic endoscope connector according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view showing the inside of the electronic endoscope connector including the shield case of the first embodiment.

FIG. 3 is a side sectional view of the connector of FIG. 1;

FIG. 4 is a front view of the connector of FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 2;

FIG. 6 is a diagram showing an electrical connection state from the CCD of the embodiment to the circuit board in the connector.

FIG. 7 is a perspective view showing a configuration of a second exemplary embodiment of the present invention.

FIG. 8 is a plan sectional view showing the inside of a conventional electronic endoscope connector.

[Explanation of symbols]

 1,10 ... connector, 2,12 ... signal cable, 3,11 ... connector case, 5,15 ... circuit board, 6,16 ... circuit member, 14,45 ... shield body, 20,47 ... shield lid, 18 , 21 ... uneven part, 48 ... locking part.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Naotake Mimori 1-324 Uetakecho, Omiya City, Saitama Prefecture Inside Fuji Photo Optical Co., Ltd. (56) References JP-A-2-266314 (JP, A) JP JP-A-4-176432 (JP, A) JP-A-5-168591 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G02B 23/24

Claims (3)

(57) [Claims] 1. An electronic endoscope connector in which a shield case is arranged on the outer periphery of a circuit board in a connector, wherein the shield case is formed by opening the upper or lower surface of the shield case and a shield cover serving as a cover of the shield body. An electronic endoscope connector comprising a shield case, wherein the shield main body and the shield lid are provided with engaging portions of a fitting type. 2. A side surface of the shield main body is integrally formed with a concave / convex portion having a predetermined length which serves as a holding concave portion for holding a circuit board on the inner side and a locking convex portion on the outer side. The electronic endoscope connector provided with the shield case according to claim 1, wherein a concave / convex portion having a locking concave portion fitted to the locking convex portion of the main body is integrally formed. 3. The first connector according to claim 1, wherein the connector case is provided with a concave portion for engaging the outer convex portion of the concave / convex portion of the shield lid and positioning the shield case itself.
An electronic endoscope connector comprising the shield case according to claim 1.