JP2581158Y2 - Cable entry shield structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure at a cable inlet of an electronic equipment cabinet.

[0002]

2. Description of the Related Art In recent years, digital computers and communication devices have been digitized and speeded up, and with widespread use thereof, electromagnetic interference waves radiated from the devices to the surrounding space have become a problem. . For this reason, even in Japan,
The Voluntary Control Council for Information Processing Equipment (VCCI) was established,
The provision of the regulation value has been designed to prevent interference with other devices.

[0003] In order to reduce electromagnetic interference, an electromagnetic shield is generally provided by housing an electronic device in a metal cabinet. The cabinet is provided with openings for introducing cables and cooling, and these openings need to be made as small as possible to obtain good shielding performance.

FIG. 3 shows a schematic structure of a general electronic equipment cabinet. The panel 2 which is a component of the cabinet 1 is provided with a signal cable 3 for connecting between electronic device cabinets and a cable inlet 5 for introducing a power cable 4 for supplying power to the electronic device. The signal cable 3 is connected to an electronic circuit unit 7 via a connector 6, and the power cable 4 is connected to a terminal board 8 at the lower part of the electronic device cabinet. Since the cable inlet 5 is made large in consideration of the workability of introducing these cables 3 and 4, a large gap is formed around the cables 3 and 4, electromagnetic interference is leaked, and the cabinet shielding performance is reduced. Will be very low.

FIG. 4 shows a conventional example of a shield device for reducing such a gap formed in the cable inlet 5. In the structure shown in FIG. 4, the drawstring conductive cloth 9 is fixed to the periphery of the cable inlet 5 of the panel 2 by a screw or the like by a metal flat frame 10. To reduce the leakage of electromagnetic interference.

[0006]

However, when the conductive cloth 9 is turned up when the cable 4 is bound, the conductive cloth 9 comes into contact with the power cable terminal portion 12 of the terminal board 8 and touches the cabinet. There is a safety problem such as an electric shock to the human body or an excessive current flowing due to a short circuit, and the device may be damaged.

An object of the present invention is to provide a cable entrance shield structure which has high shielding performance, is safe for a human body, and prevents breakage of the device.

[0008]

The cable inlet shield structure according to the present invention is such that a peripheral edge of one end of a drawstring conductive cloth as a closing member of a cable inlet of an electronic cabinet is introduced by a frame having an L-shaped cross section. It is fixed to the periphery of the mouth.

[0009]

By fixing the peripheral edge of one end of the flexible conductive cloth of the drawstring to the peripheral edge of the cable inlet with an L-shaped frame body,
The curving of the conductive cloth can be eliminated, and the conductive cloth can be prevented from contacting the power cable terminal.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a cable inlet shield structure according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. 3 and 4 indicate the same members.

The conductive cloth 9 is a cloth member having conductivity, such as a woven thin metal wire in a cloth shape, a woven metal-plated fiber, or a material bonded to a soft cloth such as aluminum foil. Are sewn into a tubular shape.

The conductive cloth 9 has an L-shaped metal frame 13 having an L-shaped cross section. One end of the conductive cloth 9 is fixed to the periphery of the cable inlet 5 of the panel 2 by screws or the like. The fixing method may be any of a method of directly sandwiching the conductive cloth 9 between the L-shaped frame 13 and the panel 2 and a method of fixing the L-shaped frame 13 attached to the conductive cloth 9 in advance to the panel 2. Good.

In order to electrically connect the conductive cloth 9 to the panel 2 at low impedance, the portions of the panel 2 and the panel 2 which are in contact with the conductive cloth 9 are conductive by metal plating, conductive coating or the like. The property is given.

In this embodiment, such a structure is employed, so that the gap between the cable inlets 5 can be reduced.
Good shielding performance can be obtained, and the conductive cloth 9 can be prevented from curling up.

In the above embodiment, the case where the cable inlet is provided on the lower surface of the cabinet is shown. However, even when the cable inlet is provided on the upper surface of the cabinet,
Similarly, by fixing the drawstring conductive cloth to the cable inlet with an L-shaped frame, it prevents the conductive cloth from rolling down,
It goes without saying that the conductive cloth can be prevented from contacting the power cable terminal connected to the terminal board mounted on the cabinet.

[0017]

As described above, according to the present invention, the periphery of the conductive cloth is fixed to the periphery of the cable inlet by an L-shaped frame so that the conductive material of the drawstring can be used in introducing the cable into the cabinet. In addition to providing high shielding performance by covering the cable introduction port with the conductive cloth, the conductive cloth can be prevented from contacting the power cable terminal portion, which is advantageous in terms of safety.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a cable inlet shield structure according to an embodiment of the present invention;

FIG. 2 is a longitudinal sectional view of the embodiment of FIG. 1;

FIG. 3 is a perspective view showing a schematic structure of a general electronic device cabinet.

FIG. 4 is a perspective view showing a conventional example of a cable inlet shield structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet 2 Panel 3 Signal cable 4 Power cable 5 Cable inlet 6 Connector 7 Electronic circuit unit 8 Terminal board 9 Conductive cloth 10 Flat frame 11 Band 12 Power cable terminal 13 L-shaped frame

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuro Toda 3-11-1, Shirogane, Minato-ku, Tokyo Inside Matsuda Manufacturing Co., Ltd. (56) References JP-A-4-297096 (JP, A) 2-54292 (JP, U) Japanese Utility Model Application 57-161282 (JP, U) Japanese Utility Model Application 63-44337 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H05K 9/00

Claims (2)

(57) [Scope of request for utility model registration] 1. A cable inlet shield in which a peripheral edge of one end of a drawstring conductive cloth as a closing member of a cable inlet of an electronic apparatus cabinet is fixed to a peripheral edge of the cable inlet by an L-shaped frame body. Construction. 2. The cable inlet shield structure according to claim 1, wherein a portion of the frame body and a panel of the electronic cabinet that is in contact with the conductive cloth is provided with conductivity.