JPH09139596A - Shield sub-rack structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which facilitates system expansion based on combination of an extension device to a basic device, with its reliable electric shielding performance and reduced initial capital investment. SOLUTION: The structure has a box-shaped casing 8 in which a slide-in unit is mounted and which is provided on its upper and lower sides with projections 6 and recesses 7 for system extension. A cover mounting base 5 is mounted onto an opening 8a of the box-shaped casing 8. The mounting base 5 has an arcuate edge 5c at its frame-like periphery and also is provided in its lower both ends with through holes 4a for hinge bearing. A front cover 1 having hinges 9 is removably tightly mounted to the cover mounting base 5 along the edge 5c. The front cover 1 is made of transparent resin incorporating an electrically conductive mesh material. When the front cover 1 incorporating the electrically-conductive mesh material is tightly mounted to the box- shaped casing 8 of an electrically conductive metal and also to the cover mounting base 5, a shielded structure is established. A user can visually observe functional indications located in the inside of the structure through the transparent front cover 1. Another casing having a similar arrangement to the above may be additionally mounted on the upper side of the box-shaped casing 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subrack structure of a communication equipment base station apparatus, and more particularly to a shield subrack structure.

[0002]

2. Description of the Related Art Electronic equipment must shield itself in order to prevent adverse effects of noise generated during its operation on the environment and, conversely, malfunction caused by external noise. As shown in FIG. 6B, in the communication device base station 21 of the conventional subrack structure in which a large number of slide-in units 14 are mounted in parallel in the housing, the subrack 25 is stacked. Then, it is mounted in the metal box type cabinet 22. The front side of the metal box type cabinet 22 is a metal door 2 that can be opened and closed in a double door.
3 and 24, the slides mounted inside by opening the metallic doors 23 and 24 for maintenance and inspection.
Check the function display of the in-unit 14. Further, it is common to cover the front surface of the cabinet 22 with metallic doors 23 and 24 that can be opened and closed in a double-door manner and shield as shown in FIG.

[0003]

Since the function display is concentrated on the front part of the slide-in unit, the above-mentioned conventional metal door has a function display (especially an alarm display) when the door is closed. ) Can't be seen. Therefore, when confirming the function display and performing maintenance and inspection, it is necessary to perform work with the metal door opened in a V shape on the front side, which requires an extra space around the installation place.

Further, in order to obtain the shielding effect, it is necessary to purchase a shield cabinet of a certain size irrespective of the required number of wireless lines, which requires an initial equipment cost,
There is a problem in terms of system expandability. In the parts that make up the shield cabinet, a commercially available door-closed handle is used for the part that secures the double-sided door cover that is on the front part, and between the cover and the cabinet, it is fairly wide all around. It is necessary to use high-priced parts such as a large conductive gasket, and there is a problem that the cost increase caused by these is inevitable.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a shield subrack structure which reliably maintains an electrical shield, is easily added, and is excellent in system expandability and economy.

[0006]

The shield subrack structure of the present invention is substantially box-shaped, is made of a conductive metal material, has a first opening on one surface, and has a slide-in unit inserted therein. A box-shaped housing to be mounted, and a box-shaped housing having a frame shape and made of a conductive metal material and having bent portions in which the peripheries of the portions corresponding to the first openings are respectively directed inward. It is mounted and has a bow-shaped edge on the surface opposite to the mounting surface, a second opening at the center, and hinge receiving portions at both lower ends, and fastener receiving holes at both upper front portions. And a cover mounting base that is made of elastic resin, and a conductive mesh is built in the intermediate layer, and hinge parts provided at both ends of the lower part fit into the hinge receiving parts, and fasteners provided at both ends of the upper part are the receiving parts. The bow of the cover mount attached to the hole A front cover that is attached in close contact with the edge of the box-shaped body, a means for positioning another box-shaped housing that is provided on the upper and lower surfaces of the box-shaped housing, and the upper and lower surfaces of the cover mounting base. And a means for fastening the box-shaped housing provided and added.

In this shield subrack structure, the positioning means comprises a convex portion provided on the upper surface of the box-shaped casing and a concave portion provided on the lower surface thereof, and between the hinge receiving portion and the hinge portion. An expandable and contractible cushioning material is provided, and further, the conductive mesh built in the front cover is folded back to the surface side in contact with the cover mount at the outer peripheral end of the front cover.

In this shield subrack structure, the box-shaped casing and the cover mounting base may be integrally formed.

[0009]

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

FIG. 1 is an exploded perspective view showing a shield subrack device according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a slide-in unit mounting state in this embodiment, and FIG. 3 is this embodiment. 5A and 5B are perspective views showing the expansion status of the expansion device according to the embodiment, and FIG. 4 is a perspective view showing in detail the front cover attaching / detaching structure in this embodiment.
FIG. 6 is an exploded perspective view showing a shield subrack device according to a second embodiment of the present invention.

In the first embodiment, as shown in FIG. 1 and FIG. 2, a slide-in unit 14 is formed inside a box made of a conductive metal material, a part of which is opened as an opening 8a and is slid into the inside. And a box-shaped casing 8 having a shape corresponding to the opening 8a of the box-shaped casing 8 and having a bent portion 5b attached to the opening 8a. The frame-shaped edge 5c around the opening 5a provided on the side opposite to the mounting surface has the shape of a bow-shaped protrusion in the vertical direction of the front surface, and is the same conductive metal material as the box-shaped housing 8. The cover mounting base 5 made of 1. and a vinyl chloride which is a commercially available product which is formed in a plate shape along the vertical direction of the cover mounting base 5 and which firmly adheres to the arc-shaped opening 5a. Made of transparent plastic fiber such as The front cover 1 is sandwiched in the middle of the light plastic fiber, and the surface of the front cover 1 in contact with the cover mounting base 5 is covered with the conductive mesh over the entire circumference. It is configured to be folded back to the contacting surface side so as to be electrically connected to the cover mounting base 5. The cover mount 5 and the box-shaped casing 8 are
It is fixed around the opening 8a by a fastening member (not shown) using the hole 5f and the female screw 8b.

Next, the box type housing 8 via the cover mounting base 5
The attachment structure of the front cover 1 to the will be described. As shown in FIGS. 1 and 4, a plate 4 serving as a hinge receiving portion projects in the front direction on the lower side of the surface portion on which the front cover 1 is mounted on the cover mounting base 5, and further in a direction perpendicular to the protruding direction. A through hole 4a having a diameter A ₁ is provided. Further, the front cover 1 has a diameter A ₂ (A ₁ > A) which can be inserted into and removed from the diameter A ₁ of the through hole 4a of the plate 4 at a position corresponding to the plate 4.
₂ ) It has a hinge 9 having a cylindrical shaft portion 9a.

[0013] As shown in FIG. 4, the one side of the hinge 9 which has on the left and right front cover 1 lower, the diameter A ₂ shaft portion 9a in the radial A ₂ is greater than the diameter B of (B> A ₂₎ Toroidal sponge 1
It has 0. When the front cover 1 is attached or detached, the front cover 1 is slid toward the hinge side having the elastic sponge 10 to crush the sponge 10. Since the width exceeds the width D of the shaft portion 9b on the non-rotating side (C> D), sponge 1
The shaft portion 9b of the hinge 9 on the side not having 0 is the plate 4
The front cover 1 can be removed from the cover mounting base 5 attached to the box-shaped housing 8 by being removed from the through hole 4a. At the time of installation, it is installed by performing the reverse operation. That is, the front cover 1 is attachable to and detachable from the box-shaped casing 8.

With the plate 4 of the cover mount 5 as a fulcrum, the front cover 1 is attached when the front cover 1 is attached along the arcuate edge 5c formed in the vertical direction of the cover mount 5. One fastener 2 is provided on each of the upper left and right sides of the front surface portion, and a fastener receiving hole 3 is provided in the cover mounting base 5 at a position corresponding to the fastener 2. By combining the fastener 2 and the fastener receiving hole 3, the front cover 1 By using the elastic force of the front cover 1, the cover mounting base 5 can be completely adhered. As a result, the front cover 1 is electrically connected to the cover mounting base 5 and the box-shaped casing 8, so that a shielding effect according to the purpose can be obtained. You can check the function display of the unit.

Next, a method for mounting a case when an additional case is added to the box-like case 8 to expand the system will be described.

As shown in FIG. 1, a box-shaped casing 8 has four columnar convex portions 6, one on each of the front left and right portions and the rear left and right portions, while the extension shown in FIG. On the bottom surface of the casing 11, a concave portion 7 is provided at a position corresponding to the convex portion 6 on the upper surface of the box-shaped casing 8.
Having. When the box-shaped housing 8 and the additional housing 11 are stacked and connected, as shown in FIG. 3, the additional housing is designed so that the projection 6 is inserted into the recess 7 with the projection 6 on the upper surface of the box-shaped housing 8 as a reference. The recess 7 on the bottom surface of the body 11 is aligned and positioned, and the additional housing 11 is connected to the box-shaped housing 8 by dropping it downward.

After connecting, as shown in FIG. 3 (a),
A box-shaped housing is formed by screwing a coupling through hole 5e provided in the lower part of the cover mounting base 5 on the front surface of the additional housing 11 and a female screw 5d on the upper part of the cover mounting base 5 of the box-shaped housing 8 with a fixture 13. 8
And the additional housing 11 are fixed. In this way, fixing work at the front cover mount 5 is easier than fixing at the box-shaped case 8 and the additional case 11 on the back side. In addition, when further increasing the number of expansion,
As shown in (b), the additional enclosure 12 is provided on the additional enclosure 11.
Then, the convex portions 6 and the concave portions 7 are positioned and connected as described above, and the upper and lower portions may be fixed at the cover mounting base 5.

In the second embodiment of the present invention, as shown in FIG. 5, a box-shaped housing and a cover mounting base are integrally formed. That is, the box-shaped housing 15 of this embodiment is
The cover mounting base 5 and the box-shaped housing 8 described in the above embodiment are integrated as if they were integrated, and the front cover 1 was attached using the plate 16 at the lower front surface and the bow-shaped edge 15a at the front center. It can be detachably attached. Further, similarly to the first embodiment, the slide-in unit 14 is inserted and mounted inside the box-shaped casing 15, and the convex portion 17 on the upper surface and the concave portion on the bottom surface (not shown) corresponding thereto. ) Can be used to stack additional enclosures.

[0019]

As described above, according to the present invention, the front cover of the housing body in which the slide-in unit is internally mounted is
Using the elastic force of the cover, the cover is completely adhered to the case and can be detachably attached and detached. Moreover, the front cover has a conductive mesh built in the resin, and the conductive mesh is the main body of the case. Since it is electrically conducting, E
MC measures can be handled easily. Also, because the front opening of the housing is covered with a transparent resin front cover, the information displayed on the front of the unit can be recognized through the front cover, which is convenient for maintenance and inspection. Produces the effect of being. Since the unit configuration allows for easy addition, system expandability is excellent and initial capital investment can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a shield subrack device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a slide-in unit mounting state according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing the expansion status of the expansion device according to the first embodiment of the present invention in (a) and (b).

FIG. 4 is an enlarged perspective view showing the front cover attaching / detaching structure according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a shield subrack device according to a second embodiment of the present invention.

FIG. 6 shows an example of a conventional shield rack device (a).
Is an external perspective view, and (b) is a perspective view with the door open.

[Explanation of symbols]

 1 Front Cover 2 Fastener 3 Fastener Receiving Hole 4,16 Plate 5 Cover Mounting Base 6,17 Convex 7 Recessed 8,15 Box Housing 9 Hinge 10 Sponge 11,12 Expansion Housing 13 Fixture 14 Slide-in Unit 21 Communication Equipment Base Station 22 Cabinet 23, 24 Door 25 Subrack

Claims (5)

[Claims] 1. A box-shaped casing which is substantially box-shaped, is made of a conductive metal material, has a first opening on one surface, and has a slide-in unit inserted therein, and is mounted in the shape of a frame. Is made of a conductive metal material, and is attached to the box-shaped housing with bent portions inwardly facing the portions corresponding to the first openings, and the surface opposite to the mounting surface is a bow. A cover mounting base having a shape edge with a second opening at the center, hinge receiving portions at both lower ends, and fastener receiving holes at both upper front ends, and a transparent transparent resin. And a hinge part provided at both ends of the lower part is fitted with the hinge receiving part, and fasteners provided at both ends of the upper part are connected to the receiving holes, and the bow shape of the cover mount is formed. The front cover that fits closely to the edge surface of the A means for positioning another box-shaped case provided on the upper and lower surfaces of the case and a means for fastening the additional box-shaped case provided on the upper and lower surfaces of the cover mount. Shield subrack structure characterized by that. 2. The shield subrack structure according to claim 1, wherein the positioning means comprises a convex portion provided on an upper surface of the box-shaped casing and a concave portion provided on a lower surface thereof. 3. The shield subrack structure according to claim 1, wherein a stretchable cushioning material is provided between the hinge receiving portion and the hinge portion. 4. The conductive mesh built in the front cover is folded back at the outer peripheral end of the front cover to the side in contact with the cover mounting base. Shielded subrack structure described in either. 5. The box-shaped casing and the cover mount are integrally formed.
Shielded subrack structure according to any one of.