JP2003124678A - Shielding structure for housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a shielding structure for a housing in which a shielding cover can be easily assembled or disassembled and a manufacturing cost can be reduced as well by decreasing the number of components. SOLUTION: The shielding structure for the housing comprises a pair of frames 13, 15 arranged in the opening of the housing 11, a rail installed between the frame 13 and 15 so that an outward tapered surface is formed on one 15 of the frames 13, 15 and an inward tapered surface is formed on the other 13, a retainer 33 provided out of the one frame 15, a shielding plate 27 having a pair of parallel sides in which first and second tapered surfaces parallel to the outward and inward tapered surfaces are formed, the second tapered surface of the plate 27 is brought into contact with the inward tapered surface, the side of the plate 27 in which the first tapered surface is brought into contact with the outward tapered surface, is brought into outward contact with the outward tapered surface by the retainer 33, so that the plate 27 is detachably to and attachably from an opening 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing shield structure suitable for use in, for example, a subrack of a communication device.

[0002]

2. Description of the Related Art For communication equipment such as a telephone exchange, for example, the entire apparatus is housed in a housing called a rack, and in this rack, electronic equipment and circuits requiring electromagnetic shielding are provided in another housing (hereinafter , "Subrack"). As shown in FIG. 7, a shield structure of this type of subrack has a shield plate (hereinafter, referred to as a “shield cover”) with a shield gasket 5 and the like interposed by screws and rivets 3 from above and below the front and rear of the subrack 1. ),
That is, the structure in which the upper and lower shield covers 7a, the back shield cover 7b, and the like are fixed is common.

[0003]

However, in the above-described conventional subrack shield structure, the shield cover is attached using the screws and the rivets, and therefore a large number of assembly steps are required at the time of manufacture. Also, when disassembling for maintenance, etc., after removing these screws and rivets,
It was more troublesome because screwing was required again. Furthermore, since screws and rivets are used, the number of parts increases, and holes for fastening these must be formed in the shield cover, the frame, and the like, which is disadvantageous in that the manufacturing cost also increases. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a shield structure for a housing in which the shield cover can be easily assembled and disassembled, and the number of parts can be reduced and the manufacturing cost can be reduced. To aim.

[0004]

In order to achieve the above object, the shield structure for a housing according to claim 1 of the present invention comprises:
A frame is arranged on a pair of parallel sides of the opening formed in the housing, and between the pair of frames in the housing,
A guide rail parallel to the opening surface of the opening is provided, an outward taper surface facing the opening is formed on one of the pair of frames, and an inward taper surface facing the opening is formed on the other, An outer side of one of the frames is provided with a holding metal fitting that is movable in parallel with the opening surface of the opening, and is attached to the housing, and is provided on a pair of parallel sides of a shield plate having a pair of parallel sides. Forming a first taper surface and a second taper surface parallel to the outward taper surface and the inward taper surface, contacting the second taper surface of the shield plate with the inward taper surface, It is characterized in that a side portion of the shield plate whose one taper surface is in contact with the outward taper surface is abutted from the outside by the pressing fitting, and the shield plate is detachably attached to the opening.

In the shield structure of this housing, a taper (an outward taper surface, an inward taper surface, a first taper surface, a second taper surface) parallel to the frame and the shield plate is provided, and the pressing metal fitting is moved, The force pressing the shield plate can be converted into the force in the direction parallel to the shield plate, which allows the shield plate to taper (first taper surface, second taper surface).
Can be fixed to the taper of the frame (the taper surface facing outward and the taper surface facing inward) to obtain the shield characteristic. Moreover, screws and rivets are not required, the number of parts is reduced, and the manufacturing cost is reduced.

According to a second aspect of the present invention, there is provided a shield structure for a housing, wherein a frame is provided on a pair of parallel sides of an opening formed in the housing, and one of the pair of frames has an inward taper facing the opening. Forming an inward groove having a surface and an outward groove having an outward tapered surface parallel to the inward tapered surface on the other side, and orthogonal to the opening surface of the opening on the outside of the other frame. A pair of parallel side portions of the shield plate, which is attached to the housing and has a pair of parallel side portions, is provided with a pressing metal plate that is movable in the direction, and the first side parallel to the inward tapered surface and the outward tapered surface. Forming a first bent portion and a second bent portion, the first bent portion of the shield plate is inserted into the inward groove, the second bent portion is hooked in the outward groove, and the outward groove is formed. The second bent portion of the shield plate, which is hooked on the The de plate characterized by being detachably mounted to said opening.

In this shield structure of the housing, by providing a taper parallel to the frame, the force of the pressing metal fitting to press the shield plate hooked on the frame can be used to fix the shield plate and move the pressing metal fitting. The shield plate can be easily assembled and disassembled simply by performing the operation.

According to a third aspect of the present invention, there is provided a shield structure for a housing, wherein first and second openings having openings are formed on two orthogonal surfaces of a housing having a plurality of surfaces. A frame having an outward taper surface is arranged in the orthogonal portion, and a first bent portion parallel to the outward taper surface is formed at one end of the first shield plate attached to the first opening. , A second bent portion that is parallel to the outward taper surface is formed at one end of the second shield plate attached to the second opening, and the second opening has an opening surface of this opening. Arrange parallel rails,
The first bent portion of the first shield plate is brought into contact with the outward taper surface, and the second shield plate is fixed to the rail so that the first bent portion faces outward at the second bent portion. It is characterized in that one end of two orthogonal shield plates is fixed and released at the same time while being held in contact with the tapered surface.

In the shield structure for this housing, one shield plate is attached to the first opening, and then the other shield plate is attached to the second opening with screws while pressing it. Then, the first bent portion of one shield plate abuts on the taper surface, and the second bent portion of the other shield plate holds the first bent portion on the outward taper surface and holds the two orthogonal planes. Fix the ends of the shield plates at the same time. This allows
By simply screwing the other shield plate, both shield plates can be easily assembled and disassembled, and the shield characteristic can be obtained.

According to a fourth aspect of the present invention, there is provided a shield structure for a housing, wherein first and second openings having openings are formed on two orthogonal surfaces of a housing having a plurality of surfaces. A frame having an outward taper surface and an outward groove is disposed in the orthogonal portion, and a pressing metal fitting rotatable about an axis orthogonal to the opening surface of the first opening is provided in the frame. At one end of the first shield plate attached to the first opening, a first tapered surface parallel to the outward tapered surface is formed, and at one end of the second shield plate attached to the second opening. Forming a second bent portion that hooks in the outward groove, abutting the first tapered surface of the first shield plate against the outward tapered surface, and making a second fold of the second shield plate. The curved portion is hooked in the outward groove, and one end of the first shield plate and the second shield are held by the pressing metal fitting. The one end of the shield plate in contact held in the frame, characterized in that at the same time releasing the fixed and secure the one ends of the orthogonal two shield plates.

In the shield structure of this casing, the first tapered surface of one shield plate is brought into contact with the outward tapered surface, and the second bent portion of the other shield plate is locked in the outward groove to hold it. By rotating the metal fitting by 90 °, one end of the first shield plate and the other end of the second shield plate are held in contact with the frame, and the ends of two orthogonal shield plates are fixed at the same time. It becomes possible. As a result, both shield plates can be easily assembled and disassembled by simply moving the fixing member, and the shield characteristic can be obtained.

According to a fifth aspect of the present invention, in a shield structure for a housing, a conductive shield gasket is provided at a contact portion between the frame and the shield plate and a contact portion between the first shield plate and the second shield plate. It is characterized by interposing.

In the shield structure of this housing, when the conductive shield gasket interposed between the abutting portion of the frame and the shield plate and the abutting portion of the shield plates is elastically deformed, the reaction force causes the shield plate to move. Press to fix the shield plate without rattling while maintaining electrical connection.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a shield structure for a housing according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a shield structure for a housing according to the present invention, and FIG. 2 is a sectional view of a main part of FIG.

In the vertical structure of the subrack 11, which is a housing, a front frame (the other frame) 13, a rear frame (one frame) 15, and a guide rail 17 constitute a vertical chassis. The guide rail 17
A plurality of pairs of upper and lower boards are arranged so as to guide the upper and lower edges of the printed circuit boards arranged in parallel in the subrack 11 in parallel with the side plates 19. The front frame 13 has a taper inwardly facing the subrack 11 (taper surface facing inward).
21 is provided. The back frame 15 has a taper (outward taper) 2 in a direction toward the outside of the subrack 11.
3 is provided.

The shield gasket 25 is made of a conductive cushion material (for example, conductive rubber) and is attached to the taper portions 21 and 23 of the front frame 13 and the rear frame 15.

The shield cover (shield plate) 27 is attached so that the shield gasket 25 is sandwiched between the front frame 13 and the back frame 15. The shield cover 27 can be, for example, a plate material such as aluminum, stainless steel, or copper punched, or a mesh-shaped plate material made of the same material. The front frame 13 and the back frame 15 are provided at the front and rear ends of the shield cover 27.
Tapers (second taper surface, first taper surface) 31 and 29 parallel to the tapers 21 and 23 of FIG.

The retainer 33 is attached to the back frame 15 and is movable in a direction parallel to the opening surface of the opening 35 to which the shield cover 27 is attached, so that the shield cover 27 can be held. Note that FIG.
The reference numeral 37 designates a bracket for movably holding the press fitting 33.

Next, the operation of the shield structure of the housing thus constructed will be described. First, set the shield cover 27 to A
It is inserted between the front frame 13 and the back frame 15 from the direction. Since the taper 23 of the rear surface frame 15 faces the outer side, the first taper surface 29 on the rear surface side of the shield cover 27 positioned in parallel is pushed up to the outside by interposing the shield gasket 25. become.

Here, when the retainer 33 is moved in the direction B, the shield cover 27 is pushed down. Then, since the back surface frame 15 has the taper 23, the shield cover 27 is moved and fixed while being pressed in the direction of the front surface frame 13.

At this time, the shield cover 27 is pressed against the taper 21 of the front frame 13. However, since the taper 21 faces inward, the shield cover 27 has a force to push it inward, and the shield cover 27 is positioned on the inner surface side. It is fixed while being supported by the guide rail 17.

Here, a conductive shield gasket 25 attached to the front frame 13 and the back frame 15
Since it is crushed by the shield cover 27, conductivity between the front frame 13, the back frame 15 and the shield cover 27 is secured, and a shield characteristic can be obtained.
When removing the shield cover 27, press the metal fitting 33
Can be removed by moving in the direction opposite to B.

As described above, according to this embodiment,
When the holding metal fitting 33 is moved, the taper 2 parallel to the front frame 13, the rear frame 15 and the shield cover 27
By providing 1, 23, 29 and 31, the vertical force pressing the shield cover 27 is converted into a longitudinal force, the shield cover 27 is fixed, and the shield gasket 25 is crushed to obtain the shield characteristic. You can
As a result, there is an effect that the shield cover 27 can be easily assembled and disassembled.

In the first embodiment, the shield cover 27 attached to the upper and lower surfaces of the subrack 11 has been described, but the taper between the frame and the shield cover can be used for the back and front shield covers. Further effects can be expected.

FIG. 3 is a perspective view of a subrack showing a second embodiment, and FIG. 4 is a sectional view of a main part of FIG. The subrack 41 is an upper frame (other frame) 43, a lower frame
The one side frame 45 and the back side shield cover (shield plate) 47 constitute the back side. The upper frame 43,
An opening 48 is formed between the lower frame 45 and the lower frame 45. There is a groove (outward groove) 49 on the outer surface of the upper frame 43,
The groove 49 is provided with a taper (outer taper surface) 51.

The inner surface of the lower frame 45 also has a groove (inward groove) 53, and this groove 53 is also provided with a taper (inward taper surface) 55. This upper frame 43,
Taper 5 provided in grooves 49 and 53 of lower frame 45
1, 55 are parallel directions.

The shield gasket 25 is made of a conductive cushion material or the like as in the above, and the upper frame 43,
It is attached to the surfaces of the taper 51 and 55 of the grooves 49 and 53 of the lower frame 45.

A taper (second bent portion, first bent portion) 59 parallel to the taper 51, 55 formed in the grooves 49, 53 of the upper frame 43 and the lower frame 45 is provided above and below the back shield cover 47. , 57 are provided, and the shield gasket 25 is sandwiched between the upper frame 43 and the lower frame 45 so as to be hooked in the grooves 49 and 53.

The pressing metal fitting 61 is attached to the upper frame 43 and movable as in the first embodiment, and can press the back shield cover 47 downward. The bracket 63 is a metal fitting for fixing the pressing metal fitting 61.

Next, the operation of the shield structure of the housing thus constructed will be described. First, the back shield cover 47
The groove 4 of the upper frame 43 and the lower frame 45 from the direction of A.
Insert it so that it catches on 9,53. Tapers 51 and 55 formed in the grooves 49 and 53, and the back shield cover 4
Since the tapers 59 and 57 of 7 are parallel to each other, they are pushed up through the shield gasket 25.

Here, when the pressing fitting 61 is moved in the direction B, the back shield cover 47 is pushed down and fixed while moving in the direction of the lower frame 45. At this time, since the upper frame 43, the lower frame 45, and the back shield cover 47 have the tapers 51, 55, 59, and 57, the pressing force of the holding metal fitting 61 is used as in the first embodiment, Fixing the back shield cover 47,
The shield characteristic can be obtained.

As described above, according to the second embodiment, the upper frame 43 and the lower frame 45 are provided with the parallel tapers 51 and 55, respectively, so that the upper frame 43 and the lower frame 45 are hooked. It is possible to fix the back shield cover 47 and crush the shield gasket 25 at the same time by using the force with which the holding metal fitting 61 presses the back shield cover 47. As a result, it is possible to easily assemble and disassemble the shield cover 47 on the back surface or the front surface only by performing the operation of moving the pressing fitting 61.

In the first embodiment, the shield covers on the upper and lower surfaces of the subrack have been described, and in the second embodiment, the shield covers on the front and rear surfaces of the subrack have been described. This makes it possible to fix the upper and lower shield covers and the front and rear shield covers at the same time, as described below.

Next, a third embodiment of the shield structure for a casing according to the present invention will be described. FIG. 5 is a cross-sectional view of an essential part of a third embodiment in which the top and bottom and front and rear shield covers are simultaneously fixed by devising the arrangement of the taper. The same members as those shown in FIG. 2 will be described with the same reference numerals. Two orthogonal surfaces of the subrack 71 (top surface and back surface)
The first and second openings 73 and 75 are opened in the.
A frame 79 having a taper (outer taper surface) 77 is provided in the orthogonal portion of the two openings 73 and 75.

The upper and lower shield covers (one shield plate) 81 are provided with a taper at the front and rear ends of the shield cover 81. The taper 31 at the front end has the same structure as that of the first embodiment, and the taper (first bent portion) 83 at the rear end (one end) 83 is formed.
Is configured to be parallel to the taper 77 when the shield cover 81 is attached.

Back shield cover (the other shield plate)
A taper (second bent portion) 87 is also provided on the upper end (the other end) of 85. The taper 87 can be parallel to and overlap the taper 83 on the rear end side of the shield cover 81. The shield gasket 25 is attached between the tapers 83 and 87.

Next, the operation of the shield structure of the housing thus constructed will be described. First, set the shield cover 81 to A
When it is attached to the rail 89 with a screw or the like while pressing the back shield cover 85 from the direction B, the shield cover 85 is pressed in the front direction. Then, similarly to the first embodiment, the shield cover 81 is pressed by the taper 21 of the front frame 13 and fixed while crushing the shield gasket 25.

As a result, the upper and lower shield covers 81 can be easily assembled and disassembled only by attaching the back shield cover 85, and the shield characteristic can be obtained.

Next, a fourth embodiment of the shield structure for a housing according to the present invention will be described. FIG. 6 is a sectional view of an essential part of a fourth embodiment in which the upper and lower shield covers are simultaneously fixed by devising a holding metal fitting. The same members as those shown in FIGS. 2 and 4 are designated by the same reference numerals and will be described. The shield cover 27 and the back shield cover 47 have the same configurations as those in the first and second embodiments. First and second openings (not shown) covered with the shield cover 27 and the back shield cover 47 are opened on two orthogonal surfaces (top surface and back surface) of the subrack 91. A taper (outer taper surface) 31 is formed on the orthogonal portion of the two openings.
And a rear frame 93 having a groove (outward groove) 49.

The frame 93 is provided with a holding metal member 95 which is rotatable around an axis perpendicular to the surface of the upper opening. The pressing metal member 95 has a length such that the shield cover 27 and the back shield cover 47 can be simultaneously fixed, and is fixed by a fixing pin 97.

Next, the operation of the shield structure of the housing thus constructed will be described. First, the taper 29 of the shield cover 27 is brought into contact with the taper 31 of the rear surface frame 93, the taper (second bent portion) 59 of the rear surface shield cover 47 is hooked in the groove (outward groove) 49, and the holding metal fitting 95 is attached.
Rotate 90 °. Then, one end of the pressing metal member 95 sandwiches one end of the shield cover 27 with the taper 31, and the other end of the pressing metal member 95 presses the taper 59 of the back shield cover 47 into the groove 49. As a result, the upper and lower shield covers 31 and the back shield cover 47 can be easily assembled and disassembled by simply rotating the pressing member 95, and the shield characteristic can be obtained.

In the above first embodiment, the shield structure of the housing is used for the upper and lower shield plates, and in the second embodiment, the shield structure of the housing is used for the front and rear shield plates. Although the case is described as an example, the shield structure of the housing according to the present invention is not limited to this, and the configuration of the first embodiment is adopted for the front and rear shield plates, and the second embodiment is adopted. Of course, the configuration of the form may be adopted for the upper and lower shield plates. Further, in the above embodiment, the case where the housing is a subrack has been described as an example, but the shield structure of the housing according to the present invention can be applied to a single housing to obtain the same effects as above. Is played.

[0043]

As described above in detail, according to the shield structure for a housing according to the present invention, the frame and the shield plate are respectively provided with parallel taper (outer taper surface, inner taper surface, first taper surface). Surface, the second taper surface), by moving the retainer, the force pressing the shield plate can be converted into the force in the direction parallel to the shield plate, thereby fixing the shield plate to the frame, The shield characteristic can be obtained. As a result, the effect that the shield plate can be easily assembled and disassembled can be obtained. Further, since screws and rivets are not required, the number of parts can be reduced and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a shield structure for a housing according to the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

FIG. 3 is a perspective view of a subrack showing a second embodiment.

FIG. 4 is a cross-sectional view of the main parts of FIG.

FIG. 5 is a cross-sectional view of main parts of a third embodiment.

FIG. 6 is a cross-sectional view of main parts of a fourth embodiment.

FIG. 7 is an exploded perspective view of a conventional shield structure for a housing.

[Explanation of symbols]

11,41 Subrack (case) 13,15,43,45,79,93 Frame 17 Guide rails 21,55 Inward taper surface 23,51 Outer taper surface 25 Shield gasket 27,47,81,85 Shield cover (Shield plate) 29 First tapered surface 31 Second tapered surface 33, 61, 95 Holding metal fittings 35, 48, 73, 75 Opening 49 Outward groove 53 Inward groove 57 Taper (first bent portion) 59 Taper ( (2nd bending part)

Claims (5)

[Claims] 1. A frame is disposed on a pair of parallel sides of an opening formed in a housing, and a guide rail parallel to the opening surface of the opening is provided between the pair of frames in the housing. The taper is installed to form an outward taper surface facing the opening on one of the pair of frames, and an inward taper surface facing the opening is formed on the other of the pair of frames. A pressing metal fitting that is movable in parallel with the opening surface is provided, and is attached to the housing and is provided on the pair of parallel side portions of the shield plate having the pair of parallel side portions, and the outward taper surface and the inward taper surface. Forming parallel first taper surface and second taper surface, contacting the second taper surface of the shield plate with the inward taper surface, and contacting the first taper surface of the shield plate with the outward taper surface Remove the side of the shield plate A shield structure for a housing, characterized in that the shield plate is detachably attached to the opening by abutting from one side. 2. A frame is disposed on a pair of parallel sides of an opening formed in a housing, and an inward groove having an inward taper surface facing the opening is formed on one of the pair of frames, An outward groove having an outward taper surface parallel to the inward taper surface is formed on the other side, and a holding metal fitting that is movable in a direction orthogonal to the opening surface of the opening is provided outside the other frame. A first bent portion and a second bent portion that are parallel to the inward taper surface and the outward taper surface are provided on a pair of parallel side portions of a shield plate attached to the housing and having a pair of parallel side portions. The second bent portion is hooked in the outward groove while the first bent portion of the shield plate is inserted in the inward groove, and the second bent portion of the shield plate is hooked in the outward groove. The shield plate is detachably attached to the opening by abutting the bent portion from the outside with the pressing metal fitting. Shield structure of the housing, characterized in that it has. 3. A housing having a plurality of surfaces is provided with first and second openings having opening portions on two orthogonal surfaces, and an outward taper surface is provided at an orthogonal portion of the two openings. A frame is provided, and a first bent portion parallel to the outward taper surface is formed at one end of the first shield plate to be mounted in the first opening, and the frame is mounted in the second opening. A second bent portion parallel to the outward taper surface is formed at one end of the second shield plate, and a rail parallel to the opening surface of the opening is disposed in the second opening, The first bent portion of one shield plate is brought into contact with the outward taper surface, and the second shield plate is fixed to the rail, so that the first bent portion is outwardly tapered surface at the second bent portion. The shield of the housing is characterized in that the two shield plates which are orthogonal to each other are held in contact with each other and fixed and unfixed at the same time. Field structure. 4. A housing having a plurality of surfaces, wherein first and second openings having openings are formed on two orthogonal surfaces, and an outward taper surface and an outer surface are formed on the orthogonal portions of the two openings. A frame having an orienting groove is provided, and a holding metal member that is rotatable around an axis orthogonal to the opening surface of the first opening is provided in the frame, and is attached to the first opening. A first taper surface parallel to the outward taper surface is formed at one end of the shield plate, and a first taper surface that is hooked in the outward groove is formed at one end of the second shield plate that is mounted in the second opening. Two bent portions are formed, the first tapered surface of the first shield plate is brought into contact with the outward tapered surface, and the second bent portion of the second shield plate is hooked in the outward groove. In addition, the one end of the first shield plate and one end of the second shield plate are brought into contact with the frame by the pressing metal fitting. Lifting to, orthogonal two sheets of shielding structure of the casing, characterized by simultaneously releasing fixing and fixing the one ends of the shield plate. 5. A conductive shield gasket is interposed between a contact portion between the frame and the shield plate and a contact portion between the first shield plate and the second shield plate. The shield structure for a housing according to any one of claims 1 to 4.