JP2008028160A - Electromagnetic wave shield structure of electronic equipment housing cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic wave shield structure which is simple in structure and is durable to the long term use in outdoors, and can attain the effect of electromagnetic wave shielding regardless of the amount of cables, and is easy to install, to remove. <P>SOLUTION: The cabinet having an opening for making cables pass through consists of a chassis 11 on which an electronic equipment is mounted, and a cover 12 which matches with the chassis portion and is mounted on the chassis detachably, The opening 14 is formed over the chassis and the cover. The electromagnetic wave shielding member having conductive wires to close the opening by being constituted in the shape of a brush consists of a first electromagnetic wave shielding member 21 prepared in the opening of the chassis, and a second electromagnetic wave shielding member 22 prepared in the opening of the cover. When the cover is engaged with the chassis, the frond edge of the each conductive wire crosses. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electromagnetic shielding structure for an electronic device housing case, and more particularly to an electromagnetic shielding structure for an electronic device housing case in which an electromagnetic wave shielding member made of a conductive wire is provided in an opening.

  Conventionally, outdoor-installed electronic device storage housings, especially communication device storage housings, are designed to separate the internal environment from the outdoor environment from the viewpoint of improving the durability of the device due to rain and rust prevention. In many cases, a connector is provided in the casing at a portion where the cable connecting to the internal device passes through the housing, and the internal device and the external cable are connected via the connector. This configuration is also adopted in an indoor housing from the viewpoint of safety.

  FIG. 4 is a schematic partially transparent side view showing an electromagnetic wave shielding structure of a conventional electronic device housing. The electronic device housing case 60 for housing the communication device 80 is composed of a chassis portion 61 and a cover portion 62 that can be separated and engaged. A cable 81 is connected to the communication device 80 that is an electronic device by a connector 82. The cable 81 is connected to the inside and outside of the housing by a connector 83 provided on the bottom surface of the housing 60.

  In this case, when the number of inputs / outputs is large and a large number of connectors are required, it is necessary to arrange a large number of connectors 83 on the outer surface of the casing, and there is a problem that the outer shape of the casing becomes large.

  A flexible conductive cloth for shielding electromagnetic waves that completely covers the opening is provided in the opening so that a large number of cables can be pulled together into the housing without connecting to external cables by providing connectors on the casing. A method for reducing radiated electromagnetic waves of an electronic device in which a plurality of vertical slits through which a cable can be inserted is provided in the conductive cloth with the lower side as an open end is disclosed in Japanese Patent Application Laid-Open No. 10-65381. Is disclosed.

Further, in Patent Document 2 (Japanese Patent Laid-Open No. 1-248699), two or more sets arranged in parallel so that the respective sides of the strip-shaped conductive rubber containing metal powder, conductive filler, etc. are in contact with each other. Cable through-holes that allow the insertion of cables between the conductive rubbers of each sheet set that overlap each other and that overlap each other so that the arrangement directions of the conductive rubbers are different from each other. An electromagnetic shielding body used for the above is disclosed.
JP-A-10-65381 JP-A-1-248699

  In the inventions described in Patent Literature 1 and Patent Literature 2, there is an advantage that the housing can be downsized because it is not necessary to provide a connector in the housing. However, in the method of Patent Literature 1, since the cloth material is weak in weather resistance, it is long. There is a problem that it is not suitable for outdoor use during the period. Similarly, the belt-like conductive rubber described in Patent Document 2 also has a problem in weather resistance, and both are desirable for outdoor installation type electronic device casings that are used outdoors for a long time, particularly for communication device casings. It is not a form.

  In addition, according to the conventional method, when an electronic device is attached to the housing, each cable is connected to a connector of the housing, or each cable is connected between a conductive cloth or a conductive rubber for shielding electromagnetic waves in the housing opening. There was a problem that the workability of installation was poor.

  The object of the present invention is that the structure is simple and durable for long-term outdoor use, the effect of electromagnetic wave shielding can be easily increased regardless of the number of cables, and the attachment of electronic equipment, An object of the present invention is to provide an electromagnetic shielding structure for an electronic equipment housing that can be easily detached.

The electromagnetic wave shielding structure of the electronic device housing of the present invention,
A housing having an opening for penetrating the cable, and an electromagnetic wave shielding member having a conductive wire configured in a brush shape to close the opening are provided.

  The housing is composed of a chassis part to which the electronic device is attached and a cover part that is aligned with the chassis part and is detachably attached to the chassis part, and the opening is formed across the chassis part and the cover part, and the electromagnetic wave The shielding member is composed of a first electromagnetic wave shielding member provided in the opening of the chassis part and a second electromagnetic wave shielding member provided in the opening of the cover part, and the cover part is engaged with the chassis part. In some cases, the tip of the conductive wire of the first electromagnetic wave shielding member and the tip of the conductive wire of the second electromagnetic wave shielding member may intersect each other.

  The height of the surface perpendicular to the surface where the opening of the chassis portion is formed and abutting with one surface of the cover portion may be less than or equal to ½ of the height of the opposing surface, and the casing is made of a conductor. When the chassis portion and the cover portion are formed, it is not necessary to have an opening other than the opening, the conductor may be a metal, and the electronic device housing is an outdoor installation type. May be.

  The brush-like conductive wire of the electromagnetic wave shielding member is a thin metal wire that overlaps in the thickness direction in multiple layers and has a length exceeding the width of the opening in the width direction. In addition, the opening may be fixed by a metal plate, and the brush-like conductive wire of the electromagnetic wave shielding member is a thin non-metallic material having conductivity by surface treatment, and is in the thickness direction. Are overlapping each other, have a length exceeding the width of the opening in the width direction, and may be fixed to the opening by a metal plate. The electronic device may be a communication device.

  The electromagnetic shielding structure of the electronic device housing of the present invention uses a pair of electromagnetic shielding members having a structure in which weather-resistant thin metal wires are continuously arranged in a brush shape at the opening of the cable introduction portion of the housing. Therefore, the electronic device inside the housing can be directly connected to the outside by a cable without using a connector. As a result, even when input / output using a plurality of external cables is performed, the housing can be reduced in size, and electromagnetic waves generated inside are blocked from flowing out by the housing and the electromagnetic wave shielding member. After installing the electronic device with the cable attached to the chassis part, the chassis part is composed of a removable chassis part and a cover part, and the cable introduction part is provided at the engaging part of the chassis part and the cover part. By attaching the cover part, the electronic device is stored.

  In the electromagnetic wave shielding structure of the electronic device housing of the present invention, the electronic device can be attached to the inside of the housing with the cable connected to the electronic device. There is an effect that the size can be reduced. Further, since there is no need for connector attachment or cable connection work, workability is improved. The reason is that an electromagnetic wave shielding member having a structure in which a thin metal wire having weather resistance is continuously arranged in a brush shape is provided in each of the chassis part and the opening part of the cover part which are the cable introduction ports of the housing. By engaging the cover part with the chassis part to which the electronic device is attached, the cable connected to the electronic device passes between the flexible thin metal wires arranged in a brush shape to the outside of the housing. It is because it is pulled out. Since the thin metal wire overlaps in the thickness direction and is connected to the conductive casing at the edge of the opening, there is also an effect that electromagnetic waves generated inside can be blocked from the outside. .

  Since an electromagnetic wave shielding member on one side can be provided on the chassis part side of the housing and the other electromagnetic wave shielding member can be provided on the cover part side, an electronic device housing case having an electromagnetic wave shielding structure can be provided without stopping the operation of the electronic device. It can be easily attached to electronic equipment. In addition, electronic devices are often installed in places with poor footing, such as high places, but the housing for electronic devices can be attached to electronic devices without handling small screws, allowing safe construction. There are benefits. This is particularly effective when the electronic device is a communication device that wants to avoid interruption even temporarily.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a housing for explaining an electromagnetic shielding structure of an electronic device housing case according to an embodiment of the present invention, and FIG. 2 is a chassis portion and a cover of the electronic device housing case of FIG. FIG. 3 is a schematic partial perspective side view of the housing for explaining the electromagnetic wave shielding structure of the electronic device housing housing of FIG. 1.

  As shown in these drawings, the electromagnetic wave shielding structure of the electronic device housing case 10 of the present invention shields electromagnetic waves generated from the communication device 30 housed in the electronic device housing case 10 or incident from the outside. A first electromagnetic wave shielding member 21 and a second electromagnetic wave shielding member 22 provided in the opening portion 14 for introducing the cable of the metal chassis portion 11 and the cover portion 12 and the electronic device housing 10. It has a configuration with. The first electromagnetic wave blocking member 21 and the second electromagnetic wave blocking member 22 have a wire 23 formed in a brush shape, and when the chassis portion 11 and the cover portion 12 are engaged, the tips of the wires 23 intersect each other. Thus, it becomes a passage for the cable 31. Here, the electronic device will be described as an example of a communication device in which the present invention is most effectively used. However, the present invention is not limited to this and can be widely applied to an electronic device housed in the electronic device housing 10 for outdoor use. Is particularly effective, but it is also used indoors.

  The electronic device housing 10 includes a metal chassis part 11 and a metal cover part 12 combined with the chassis part 11. The surface having the opening 14 shown in FIG. 1 is a bottom surface when installed. The chassis part 11 and the cover part 12 can be removed. When these parts are combined, the chassis part 11 and the cover part are provided by the engagement metal fitting 15 provided on the surface opposite to the surface having the fixing metal 13 in FIG. 12 is engaged, the cover part 12 is rotated around the engaging part, and the chassis part 11 and the cover part 12 are fixed by the fixing bracket 13 provided on the opposite surface. Thereby, except the opening part 14 of the electronic device storage housing | casing 10 will be in a closed state.

  As shown in FIG. 2, the height of the side surface to which the fixing bracket 13 of the chassis portion 11 is attached is lower than the other side surfaces. This is to allow the chassis portion 11 to be hidden under the communication device 30 with a small gap between the support member and the communication device 30 when the chassis portion 11 is attached to the existing communication device 30. .

  An opening 14 for pulling out the cable 31 is provided across the chassis portion 11 and the cover portion 12 serving as a bottom surface at the time of installation. The chassis portion 11 covers the opening portion 14 so as to block the first electromagnetic wave. A second electromagnetic wave blocking member 22 is attached to the member 21 and the cover portion 12.

  The first electromagnetic wave blocking member 21 and the second electromagnetic wave blocking member 22 include a conductive thin metal wire 23 configured in a brush shape and a metal plate for attaching the wire 23 to the housing 10. The wire 23 overlaps in the thickness direction as a multilayer, and the length of the brush composed of the wire 23 is longer than the width of the opening 14 to be attached. Have. When the chassis part 11 and the cover part 12 are engaged with the respective electromagnetic wave shielding members 21 and 22 attached, the tips of the wires 23 of the electromagnetic wave shielding members 21 and 22 intersect each other.

  Next, a method for housing the communication device 30 in the electromagnetic wave shielding structure of the electronic device housing of the present embodiment having such a configuration will be specifically described. When the existing communication device 30 is electromagnetically shielded using the electromagnetic wave shielding structure of the electronic device housing of the present embodiment, the following operation is performed.

  First, the fixing of the existing communication device 30 fixed to a support member (not shown) is released, and the low side surface of the chassis portion 11 is formed in the gap formed between the side surface of the communication device 30 and the support member. (Left side as viewed in FIG. 2) is inserted, and the chassis 11 is fixed to a support member (not shown) at a predetermined position. As a fixing method, a hook or a screw is used depending on the situation. Next, the communication device 30 is fixed to the inner surface of the chassis portion 11. As a fixing method, it is fixed to a mounting member (not shown) provided in the chassis portion 11 in advance with a hook or a screw. It is desirable that the height of the low side surface of the chassis portion 11 is ½ or less of the other surface.

  Next, the engagement metal fitting 15 provided on the side surface of the cover portion 12 facing the low height side surface of the chassis portion 11 in FIG. 2 is engaged with the engagement metal fitting 15 provided on the upper end of the chassis portion 11. Then, the electronic device housing 10 is assembled by mounting the cover portion 12 on the chassis portion 11 so as to rotate and fixing the cover portion 12 to the chassis portion 11 with the fixing bracket 13.

  An opening 14 for introducing the cable 31 is formed across the chassis portion 11 and the cover portion 12 on the lower surface of the assembled electronic device housing case 10. A first electromagnetic wave blocking member 21 and a second electromagnetic wave blocking member 22 are attached to each opening 14 so that the tips of the wires 23 intersect each other after assembly. The cable 31 extending from the communication device 30 to the outside is sandwiched between the brush-like wires 23 of the first electromagnetic wave shielding member 21 and the second electromagnetic wave shielding member 22 by attaching the cover portion 12 to the chassis portion 11. Each of the wires 23 is a metal metal plate and is fixed to the metal chassis portion 11 and the cover portion 12. Since the wires 23 overlap each other in the thickness direction, the metal electronic device The housing case 10 and the electromagnetic wave shielding members 21 and 22 are in a state where electromagnetic waves are shielded between the outside and the inside of the case. Since there is no opening other than the opening 14 for pulling out the cable 31 in the electronic device housing case 10, the entire electronic device housing case 10 has an electromagnetic shielding structure.

  According to this electromagnetic wave shielding structure, since the wire 23 on the brush of the first electromagnetic wave shielding member 21 and the second electromagnetic wave shielding member 22 provided in the opening portion 14 for introducing the cable has flexibility, Even in the state where the cable 31 is connected to the communication device 30, the electromagnetic wave shielding of the opening 14 can be easily performed only by attaching the cover portion 12 to the chassis portion 11. In addition, the electronic device housing case 10 can be easily attached to the communication device 30, and the construction can be performed safely even at high places.

  When newly installing the electronic device housing case 10 in which the communication device 30 is housed, the communication device 30 is incorporated in the electronic device housing case 10 in advance, and the electronic device housing case 10 in which the communication device 30 is incorporated is installed. What is necessary is just to fix to a predetermined | prescribed support member. In this case, the cable 31 may be attached to the communication device 30 in advance, and when the cable 31 is attached to the communication device 30 after installation, the cable 31 is opened with the cover 12 of the installed electronic device housing case 10 open. Is attached to the communication device 30 and the cover portion 12 is closed, the penetrating portion of the cable 31 is in a shielded state.

  Up to now, the electronic device housing case 10 has a chassis portion 11 and a cover portion 12, and the first electromagnetic wave is provided in each of the openings 14 provided across the bottom surface of the chassis portion 11 and the bottom surface of the cover portion 12. It has been described that the blocking member 21 and the second electromagnetic wave blocking member 22 are provided and the cable 31 is sandwiched by the engagement between the chassis portion 11 and the cover portion 12. However, the bottom surface of the electronic device housing is not divided, and an electromagnetic wave shielding member is provided on each of opposite sides of the opening provided on the bottom surface, and the cable of the communication device is connected to the wire intersecting the electromagnetic wave shielding member. The electromagnetic wave shielding structure of the present invention can be applied even to a structure in which the communication device is attached inside the housing after being pulled out to the outside. In this case, since the casing can be composed of a box-shaped main body and a lid, the casing has a simple configuration.

  In the present embodiment, the wire 23 has been described as a thin metal wire. However, the present invention is not limited to this, and even when the wire 23 is a non-metallic material such as nylon, conductivity is imparted by plating or the like. For example, the electromagnetic shield structure of the present invention can be realized as an application example without being limited to a metal material.

It is a typical perspective view of the housing | casing for demonstrating the electromagnetic wave shield structure of the electronic device storage housing | casing of embodiment of this invention. It is a typical perspective view of the state which isolate | separated the chassis part and cover part of the electronic device storage housing | casing of FIG. It is a typical partial see-through | perspective side view of the housing | casing for demonstrating the electromagnetic wave shield structure of the electronic device storage housing | casing of FIG. It is a typical partial see-through | perspective side view which shows the electromagnetic wave shield structure of the electronic device storage housing | casing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 60 Electronic equipment housing | casing 11, 61 Chassis part 12, 62 Cover part 13, 63 Fixing metal fitting 14 Opening part 15 Engagement metal fitting 21 1st electromagnetic wave shielding member 22 2nd electromagnetic wave shielding member 23 Wire 30, 80 Communication Equipment 31, 81 Cable 32, 82, 83 Connector

Claims (9)

A housing having an opening for penetrating the cable;
An electromagnetic wave shielding member for an electronic equipment housing, comprising: an electromagnetic wave shielding member having a conductive wire configured in a brush shape and closing the opening. In the electromagnetic wave shielding structure of the electronic device housing case according to claim 1,
The housing includes a chassis part to which an electronic device is attached, and a cover part that is aligned with the chassis part and is detachably attached to the chassis part.
The opening is formed across the chassis part and the cover part,
The electromagnetic wave shielding member includes a first electromagnetic wave shielding member provided at an opening portion of the chassis portion, and a second electromagnetic wave shielding member provided at an opening portion of the cover portion, and the cover is provided on the chassis portion. An electronic device housing case in which the tip of the conductive wire of the first electromagnetic wave shielding member and the tip of the conductive wire of the second electromagnetic wave shielding member intersect when the parts are engaged Electromagnetic shielding structure.   3. The electromagnetic wave shielding structure of the electronic device housing case according to claim 2, wherein a height of a surface that is orthogonal to a surface of the chassis portion where the opening is formed and abuts against one surface of the cover portion is opposed to the surface. The electromagnetic wave shielding structure of the electronic device housing which is 1/2 or less of the height of the electronic device.   4. The electromagnetic wave shielding structure for an electronic device housing case according to claim 1, wherein the case is formed of a conductor, and the chassis portion and the cover portion are engaged with each other. An electromagnetic wave shielding structure of an electronic device housing having no opening other than the opening.   5. The electromagnetic wave shielding structure for an electronic device housing case according to claim 4, wherein the conductor is a metal.   6. The electromagnetic wave shielding structure for an electronic device housing case according to claim 1, wherein the electronic device housing case is an outdoor installation type.   7. The electromagnetic wave shielding structure of the electronic device housing case according to claim 1, wherein the brush-like conductive wire of the electromagnetic wave shielding member is a thin metal wire and has a thickness. The electromagnetic wave of the electronic device housing that overlaps in the direction of multiple layers, has a length exceeding the width of the opening in the width direction, and is fixed to the opening by a metal plate Shield structure.   7. The electromagnetic wave shielding structure of the electronic device housing case according to claim 1, wherein the brush-like conductive wire of the electromagnetic wave shielding member has a small diameter having conductivity by surface treatment. It is a non-metallic material that overlaps in the thickness direction in multiple layers, has a length that exceeds the width of the opening in the width direction, and is fixed to the opening by a metal plate The electromagnetic shielding structure of the electronic equipment housing.   The electromagnetic wave shielding structure of the electronic device housing case according to any one of claims 1 to 8, wherein the electronic device is a communication device.

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