JP2618153B2 - Locker structure of communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locker structure for accommodating electronic equipment, particularly communication equipment, which can effectively cope with electrostatic discharge (ESD) and electromagnetic interference (EMI) from a human body.

[0002]

2. Description of the Related Art Conventionally, a plurality of shelves mounted in an EMI / ESD compatible locker are connected to a locker frame ground (FG) so as to be electrically connected to the locker, that is, the shelf is FG. And it is fixed so that it is in sufficient surface contact.

[0003]

However, in the conventional structure, since the addition or replacement of shelves is not particularly taken into consideration, the installation and removal of the shelves is extremely troublesome, time-consuming and time-consuming. There is such a disadvantage. In view of the above, an object of the present invention is to provide a locker structure of a communication device that can easily and easily and quickly add a shelf on the front side of the locker and that can sufficiently cope with EMI / ESD. .

[0004]

According to the present invention, there is provided a locker structure for a communication apparatus according to the present invention, wherein a plurality of communication apparatus shelves are removably mounted from an open front surface thereof. The rail assembly provided in the locker and guiding and supporting the shelf includes an insulating portion for separating the signal ground of the shelf and the frame ground of the locker body, and the metal side pillar of the locker is Has a vertically extending long groove that can collectively accommodate the power cables of the respective shelves, and is separated from the power cable by one side surface of the side pillar on the front side of the side pillar, and is freely openable to the front side of the locker. A vertically extending duct portion that can collectively accommodate the signal cables of each shelf is provided, one portion of the duct portion is integrally connected to the side pillar, and the other portion is A side post via the contact gasket extending below, to reduce the contact impedance, characterized in construction to be connected to the movable.

[0005]

The signal ground of the shelf and the frame ground of the locker are separated by the insulating portion of the rail assembly. The power cable of the shelf is housed so as to be covered by the long groove of the metal side pillar of the locker, is isolated from the signal cable, and the signal cable itself is connected to the side pillar so as to lower the contact impedance. Since the signal cable is housed in the unit, the signal cable is hardly affected by noise at least from the outside or from the power cable. Further, since the duct portion can open the signal cable to the front side of the locker, the shelf can be easily and quickly added to the locker.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a locker structure according to an embodiment of the present invention, and FIG. 2 is a horizontal cross-sectional view of the locker structure of FIG. Referring first to FIG. 1, the box-shaped locker 1 of this embodiment is basically composed of side columns 3, 3 'having a U-shaped cross section on both front sides and rear columns 5, 5' having an L-shaped cross section on both rear sides. , And an upper frame 7 and a lower frame 9 above and below the column.
Is attached. A shield plate 10 covering the opening of the upper frame 7 is screwed.

On the rear surface of the locker 1, fixing brackets 1 at four corners are provided.
1, a back cover 13 is attached. Back cover 13
The surface that contacts the upper frame 7 and the lower frame 9 is coated with a masking paint or a conductive paint. On both sides of the locker 1, a side cover 19 is provided via an intermediate fixing bracket 15 and an upper and lower fixing bracket 16 for bridging the side pillar 3 (3 ') and the rear pillar 5 (5').
Is attached. Similarly to the back cover 13, the surface of the side cover 19 in contact with the upper frame 7, the lower frame 9, and the like is subjected to masking coating or conductive coating.

A gap (slit) extending vertically is formed at the abutting portion of the back cover 13 and the side cover 19 in terms of processing accuracy and assembling accuracy, and the rear pillar 5 (5 ') closes the gap. Since it extends vertically, there is no particular inconvenience on the shield. However, if higher shielding properties are required, the butting may be stopped and, for example, the connecting portions of both covers may be configured to overlap. In addition, from the viewpoint of EMI characteristics, it is better that the two covers 13 and 19 are formed of a single plate rather than of a split structure. Further, by forming the cover 13 and 19 from corrosion-resistant aluminum or a plated steel plate, the manufacturing cost can be reduced.

By the way, the front surface of the locker 1 is open, and the electronic device, specifically, a wireless communication device (not shown)
Are mounted and detached from the front side. In order to attach and detach the shelf 21, a rail assembly 25 is formed by bending a metal plate material into an approximately L-shape so as to bridge the side columns 3, 3 'and the rear columns 5, 5' inside the locker. Installed symmetrically at intervals.

Hereinafter, the inside of the locker will be described in detail with reference to FIG. 2. Since the locker 1 has a symmetrical structure, only the portion on one side (right side) will be mainly described from the viewpoint of avoiding redundant description. I decided to. An insulating member 27 is attached to each of rail surface portions 26 on both sides of the rail assembly 25 on which the lower surface of the shelf actually slides (slids) at the time of attachment / detachment, using countersunk screws. An insulating plate 30 is provided with an adhesive tape (not shown) on the rail side surface portion 29 rising vertically from the side so as to prevent electrical contact with the shelf 21 (not shown in FIG. 2). Similarly, a shelf mounting surface portion 32 that is vertically stuck from the shelf front side of the rail surface portion 26 also has
An insulating plate 33 is attached. Since the rail structure as described above is employed, the frame ground (FG) on the rocker body side and the signal ground (SG) on the shelf side are completely electrically separated from each other. It has a structure that can be used. By forming the rail itself from, for example, a polyvinyl chloride resin metal laminate, the insulating member and the insulating plate can be eliminated.

At predetermined positions on both sides of the insertion side (rear surface) of the shelf 21, pin members (not shown) projecting in the insertion direction are provided, while on the rocker side (rail assembly 25), these pins are provided. A receiving fitting 35 having a recess or a hole (not shown) into which the member can be male-female-fitted is provided. Then, when the shelf 21 is mounted at a predetermined position in the locker, the two members fit perfectly, and so-called rattling (vibration, floating, etc.) of the shelf 21 can be effectively prevented. I have.

A corresponding power supply cable A for supplying electricity to each of the shelves 21 arranged in a line above and below
Are collectively housed in advance in a U-shaped long groove inside thereof, and are detachably connected to a dedicated power cord (not shown) pulled out from the shelf 21 at the height position of each shelf 21. It has become. At a predetermined position of the upper frame 7, a rectangular opening 37 corresponding to the long groove of the side pillar 3 (3 ') is formed (FIG. 1), and a power cable A (FIG. 1 (not shown in FIG. 1) is introduced into the locker through this.

On the other hand, a large number of signal cables B connected to the respective shelves 21 are integrally attached to the side surfaces of the side pillars 3 (3 ') at predetermined intervals, and have stepped ducts projecting half forward to the rocker. A cable duct 43 having an L-shaped cross section, which is detachably attached to the fixing bracket 39 by a resin fastener, for example, a so-called nip latch 41, which is difficult to discharge.
Is housed in a duct space (duct section) extending vertically inside the inside of the box.

The edge of the cable duct on the side post side is the side post 3
An EMI gasket 45 is inserted between them in consideration of the gap (play) with respect to (3 '). That is, a stepped portion extending vertically is formed at a corner portion of the side pillar 3 (3 ') on the front side of the shelf, and the EMI gasket 45 having a rectangular cross section is vertically formed so as to partially protrude toward the front side of the shelf. It is pasted on. Thereby, when the cable duct 43 is attached and fixed by the nip latch 41, the cable duct 4
3 is reliably connected to the side pillar via the EMI gasket 45 without play (play). The EMI characteristics can be improved by performing a masking process on both of the members that come into contact with the EMI gasket. An opening (not shown) is formed at a predetermined position of the upper frame 7 corresponding to the cable duct 43 so that a physical and mechanical load is not applied to the signal cable B.

As described above, in this embodiment, the rail assembly 25 for guiding and supporting the shelf 21 insulates each shelf 21 and the locker 1 individually, and each power cable A The cable duct 43 is housed so as to be covered by the groove 3 'and is separated from the signal cable B, and the cable duct 43 for accommodating the signal cable B can be detached so that the signal cable B can be taken out to the front side of the locker. Since the signal cable B is configured so as to be reliably connected to the frame ground (FG), the signal cable B is hardly affected by noise from the outside or the power cable A. In addition, since the signal line B is arranged on the front side of the locker 1 so as to be easily taken out, it is possible to easily and quickly exchange the shelf 21 or the like.

[0016]

As described above, according to the present invention, the disadvantages of the prior art can be effectively solved, and the shelf can be easily and quickly added to the locker.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a locker structure according to one embodiment of the present invention.

FIG. 2 is a horizontal sectional view of the rocker structure of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Locker 3, 3 '... Side pillar 21 ... Shelf 25 ... Rail assembly 27 ... Insulating member 30 ... Insulating plate 33 ... Insulating plate 43 ... Cable duct 45 ... EMI gasket

Claims (1)

(57) [Claims] 1. A box-shaped locker (1) in which a plurality of communication device shelves (21) are removably mounted from an open front surface thereof, which is provided in the locker and guides and supports the shelves (21). The rail assembly (25) to be mounted includes a signal ground of the shelf (21), a frame ground of the locker body,
The metal side pillars (3, 3 ') of the locker (1) centralize the power cable (A) of each shelf (21). A vertically extending long groove portion that can be accommodated in the front side of the locker is separated from the power supply cable (A) by one side surface of the side post (3, 3 ′) on the front side from the column side (3, 3 ′). A vertically extending duct portion (43) capable of collectively accommodating the signal cables (B) of the respective shelves (21) is provided so as to be freely openable, and one portion of the duct portion (43) is provided with a side pillar (3). , 3 '), and the other part is movably connected to the side pillars (3, 3') via a vertically extending contact gasket (45) so as to lower the contact impedance. A locker structure for a communication device.