JPH0736499U - Cable inlet shield structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cable inlet shield structure that has high shielding performance, is stable to the human body, and prevents damage to the device. [Structure] A peripheral edge of one end of a conductive cloth 9 is fixed to a peripheral edge of a cable introduction port 5 of a panel 2 by a screw or the like by an L-shaped frame body 13 made of metal and having an L-shaped cross section.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shield structure at a cable inlet of an electronic device cabinet.

[0002]

[Prior art]

 In recent years, electronic computers, communication devices, etc. have been digitized and speeded up, and with their widespread use, electromagnetic interference waves radiated from the devices into the surrounding space have become a problem. For this reason, in Japan, the Voluntary Control Council for Information Processing Equipment (VCCI) has been established to prevent interference with other equipment by setting a regulation value.

[0003] In order to reduce electromagnetic interference waves, electronic devices are generally electromagnetically shielded by being housed in a metal cabinet. Cabinets are provided with openings for cable introduction and cooling, and these openings should be made as small as possible for good shielding performance.

FIG. 3 shows a schematic structure of a general electronic device cabinet. The panel 2 which is a component of the cabinet 1 is provided with a signal cable 3 for connecting electronic device cabinets and a cable introduction port 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 below the electronic device cabinet. Since the cable inlet 5 is made large considering the workability of introducing these cables 3 and 4, a large gap is created around the cables 3 and 4, electromagnetic interference waves leak, and cabinet shielding performance Will be very low.

FIG. 4 shows a conventional example of a shield device for reducing the gap formed in such a cable introduction port 5. In the structure shown in FIG. 4, the purse-string conductive cloth 9 is fixed to the peripheral edge of the cable introduction port 5 of the panel 2 with screws or the like by the metallic flat frame body 10. After the cable 4 is introduced, the cable 4 is attached to the band 11 It is restrained by electromagnetic waves and the leakage of electromagnetic interference is reduced.

[0006]

[Problems to be solved by the device]

 However, when the cable 4 is bound, the conductive cloth 9 is rolled up, so that the conductive cloth 9 comes into contact with the power cable terminal portion 12 of the terminal board 8 and the human body touching the cabinet receives an electric shock. There is a safety problem such as 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 inlet shield structure that has high shielding performance, is safe for the human body, and prevents damage to the device.

[0008]

[Means for Solving the Problems]

 In the cable inlet shield structure of the present invention, one end of a purse-like conductive cloth as a closing member for the cable inlet of an electronic cabinet is fixed to the periphery of the cable inlet by a frame having an L-shaped cross section.

[0009]

[Action]

 By fixing one end of the flexible conductive cloth of the purse string to the peripheral edge of the cable inlet with an L-shaped frame, the conductive cloth can be prevented from curling up, and the conductive cloth is connected to the power cable terminal part. It is possible to prevent contact with.

[0010]

【Example】

 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. The same reference numerals as those in FIGS. 3 and 4 denote the same members.

The conductive cloth 9 is a cloth-like member having conductivity, such as cloth woven with thin metal wires, cloth woven with metal-plated fibers, or a piece bonded to a soft cloth such as aluminum foil. Is sewn into a tubular shape.

The conductive cloth 9 is fixed to the peripheral edge of the cable introduction port 5 of the panel 2 with a screw or the like by an L-shaped frame body 13 made of metal and having an L-shaped cross section. Either the method of directly sandwiching the conductive cloth 9 between the L-shaped frame 13 and the panel 2 or the method of fixing the conductive cloth 9 to which the L-shaped frame 13 is previously attached to the panel 2 is fixed. But it's okay.

In order to electrically connect the conductive cloth 9 to the panel 2 with a low impedance, the L-shaped frame 13 and the portion of the panel 2 in contact with the conductive cloth 9 are formed by metal plating, conductive coating, or the like. Give conductivity.

Since this embodiment has such a structure, the gap between the cable introduction ports 5 can be made small, good shielding performance can be obtained, and the conductive cloth 9 can be curled up. It can be prevented.

In the above-mentioned embodiment, the case where the cable introduction port is provided on the lower surface of the cabinet is shown. However, even when the cable introduction port is provided on the upper surface of the cabinet, the conductive cloth of the purse string is similarly provided. By fixing it to the cable inlet with an L-shaped frame, it is possible to prevent the conductive cloth from curling up and prevent the conductive cloth from contacting the power cable terminal part connected to the terminal board mounted on the upper part of the cabinet. Needless to say.

[0017]

[Effect of device]

 As described above, according to the present invention, by fixing the peripheral edge of the conductive cloth to the peripheral edge of the cable introduction port by the frame body having an L-shaped cross section, the conductive cloth of the purse string is used in the cable introduction of the cabinet. In addition to blocking the cable inlet to obtain high shielding performance, it is also possible to prevent contact with the power cable terminal of the conductive cloth, which is an advantage from a safety standpoint.

[Brief description of drawings]

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

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

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]

 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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuro Toda 3-11-1 Shirokane, Minato-ku, Tokyo Matsuda Manufacturing Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A cable introducing port shield in which one end of a purse-like conductive cloth as a member for closing a cable introducing port of an electronic device cabinet is fixed to the peripheral edge of the cable introducing port with a frame having an L-shaped cross section. Construction. 2. The cable inlet shield structure according to claim 1, wherein conductivity is imparted to a portion of the panel of the electronic cabinet which is in contact with the conductive cloth.