JPH07245496A - Electromagnetic wave shielding enveloped bag, enveloped body and electronic equipment provided with built-in enveloped body - Google Patents

Abstract

PURPOSE:To provide an electromagnetic wave shielding enveloped bag for enveloping an electronic component with reliable all-direction electromagnetic wave shielding, an enveloped body which contains the electron component and an electronic equipment provided with the built-in enveloped body. CONSTITUTION:A multilayer sheet is formed of an insulator layer 11, which is to be the outer layer, a conductor layer 12, which is to be the intermediate layer, and a heat sealing insulator layer 13, which is to be the inner layer. A bag 1 is formed by folding the multilayer sheet in two permitting the side of the heat sealing insulator layer 13 to be the inner side. The areas on both sides when the multilayer sheet is folded in two are heat sealed and are sewn by the sewing machine. The remaining areas on the top and bottom sides of the opening are not provided with the heat sealing insulator layer 13 and are permitted to be exposing areas 14 and 14 where the conductor layer 12 is exposed, and one of the exposing areas 14 and 14 is provided with conductive adhesive tape 15. An enveloped body is the bag 1 that contains an electronic component 2. An electronic equipment is formed by incorporating the enveloped body in a case 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding enclosing bag for enclosing electronic parts, an enclosing body containing electronic parts inside the bag, and an electronic device incorporating the enclosing body. It is a thing.

[0002]

2. Description of the Related Art In electronic equipment such as computers, word processors, printers, storage devices, and various peripheral equipment, EMI (electromagnetic interference or interference) or RFI is used.
Various electromagnetic wave shielding means have been taken as a countermeasure against (electromagnetic interference), that is, in order to prevent leakage of electromagnetic waves from the inside and invasion of electromagnetic waves from the outside.

One of the typical electromagnetic wave shielding means is a method of providing a conductive layer on the inner surface of a plastic housing of an electronic device by a method such as electroless plating, thermal spraying, or sticking a metal foil. The other is a method of wrapping an electronic circuit board mounted inside the housing with a case made of a metal plate or a conductive sheet.

[0004]

However, electroless plating, thermal spraying,
The method of providing the conductive layer by a method such as attaching a metal foil is disadvantageous in terms of workability and cost since the housing has a three-dimensional structure, and also has a disadvantage of making the housing heavy.
In addition, since the housing has windows, ventilation holes, and gaps for assembly, it is necessary to provide special complicated electromagnetic wave shielding means to these parts in order to achieve the purpose of electromagnetic wave shielding. is there.

The method of wrapping the electronic circuit board in a case made of a metal plate or a conductive sheet also increases the manufacturing cost because the size and shape of the electronic circuit board are various, and the method of wrapping the electronic circuit board in the case is a device. Since the board occupying space inside becomes large, the housing itself must be made large,
This is against the trend of compacting.

The following applications have been filed for bags or cases used for the purpose of preventing electrostatic damage to electronic components. That is, for using a bag made of a folded sheet having a conductive layer having a surface resistance of about 10 ⁸ to 10 ¹⁴ ohms, for example, Japanese Patent Publication No. 1-3839
No. 8 (JP-A-59-139698) and JP-A-53-88953. Regarding the use of a bag or case for containing electronic parts having a conductive layer such as a metal thin film or an indium oxide film, JP-A-57-199647 and JP-A-54-65694.
Japanese Utility Model Publication No. 57-138332, Japanese Utility Model Publication No. 54
-89457 and Japanese Utility Model Laid-Open No. 54-22150.

However, the bags or cases described in these publications are for the purpose of preventing static electricity damage,
No consideration is given to electromagnetic shielding. Further, even if it is considered to use these for the purpose of electromagnetic shielding, the intended purpose of electromagnetic shielding cannot be achieved because electromagnetic waves leak from Koguchi of the heat-sealing portion during bag making.

Against this background, the present invention provides an electromagnetic wave shielding enclosing bag for enclosing an electronic component, which is capable of obtaining reliable omnidirectional electromagnetic wave shielding property, and an enclosure containing the electronic component inside the bag. , And an electronic device incorporating the enclosure thereof.

[0009]

An electromagnetic wave shielding envelope bag according to the present invention comprises an insulator layer (11) as an outer layer, a conductor layer (12) as an intermediate layer, and a heat sealable insulator as an inner layer. A multilayer sheet consisting of layers (13) is folded in two so that the heat-sealable insulating layer (13) side is on the inside, and both side bands when folded in half are heat-sealed and conductive yarns (16 ) Is sewn with a sewing machine, and the upper and lower sides of the remaining openings are exposed zones (14) and (14) where the conductor layer (12) is exposed without the heat-sealable insulator layer (13). In addition, the bag (1) is configured such that the conductive adhesive tape (15) is provided on one of the exposed zones (14), (14).

The enclosure of the present invention comprises the bag (1) and the electronic component (2) inside.

An electronic apparatus according to the present invention uses the above enclosure as a housing.
It is built into (3).

The present invention will be described in detail below.

The multi-layer sheet constituting the bag (1) comprises an insulator layer (11) as an outer layer, a conductor layer (12) as an intermediate layer, and a heat-sealable insulator layer (13) as an inner layer. .

As the outer insulating layer (11), various plastic films such as polyester film, polypropylene film, polyamide film, polyvinyl chloride film and polyurethane film are used, and biaxially stretched film is used. Sometimes.

A metal foil such as an aluminum foil or a laminate of the metal foil and a plastics layer is preferably used as the conductor layer (12) serving as an intermediate layer. In addition, weaving using multifilament yarns or monofilament yarns made of fine metal wires (Monel, copper weld, aluminum, tin-plated copper, etc.) or metal-coated fibers (fibers that are metal-coated with synthetic fibers by plating, vapor deposition, sputtering, or other means) It is also possible to use a conductive woven fabric, a woven fabric woven using synthetic fiber threads, and a conductive woven fabric coated with a metal.

As the heat-sealable insulating layer (13) which is an inner layer, low density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer, ethylene-ethylenically unsaturated carboxylic acid Examples thereof include layers of heat-sealable resins such as copolymers, ionomers, low-melting point polypropylenes and polyesters.

The multi-layered sheet having such a multi-layered structure is folded in two so that the heat-sealable insulating layer (13) side is inside. The folded side has a conductive layer (12).
Is continuous, so that continuity is maintained.

Of the other three sides folded in two, both side zones are heat-sealed. In this case, since electromagnetic waves leak from Koguchi due to heat sealing, both side bands are sewn with the conductive thread (16) to prevent them from leaking. Here, as the conductive thread (16), a fine metal wire (monel, copper weld, aluminum, tin-plated copper, etc.) or metal-coated fiber (synthetic fiber plated,
A multifilament thread or a monofilament thread made of metal-coated fibers by means such as vapor deposition or sputtering is used.

If necessary, an insulating tape (17) may be applied from above the exposed portion of the sewing machine-sewn conductive thread (16).
Can be attached to complete the insulation.

The zones on the upper and lower sides of the remaining openings are exposed zones (14) and (14) where the conductor layer (12) is exposed without the heat-sealable insulator layer (13). And this exposed band (1
A conductive adhesive tape (15) is provided on one of 4) and 14). The peelable sheet (18) is covered from above the conductive adhesive tape (15), and the peelable sheet (18) is peeled off when the opening is closed.

An envelope is formed by enclosing the electronic component (2) inside the bag (1) having the above-mentioned structure and closing the opening of the bag (1). In this case, the flat cable for connecting to the connector should stick out from the opening of the bag (1). In some cases, the inside of the bag (1) may be evacuated. Examples of the electronic component (2) include arbitrary electronic components such as an electronic circuit board and an electronic circuit chip.

Then, the electronic device is completed by incorporating the above-mentioned enclosure in the housing (3). Examples of the electronic device include a computer, a word processor, a printer, a facsimile, an electronic control device, an electronic typewriter, a storage device, a communication device, a display device, an audiovisual device, a home electric appliance, and various other peripheral devices.

[0023]

[Function] The bag (1) is formed by folding a multi-layered sheet composed of an insulating layer (11) serving as an outer layer, a conductive layer (12) serving as an intermediate layer, and a heat-sealable insulating layer (13) serving as an inner layer into two. As a result, the electromagnetic wave shielding properties of the upper surface, the lower surface and the folded sides are perfect.

Since both side zones of the remaining three sides are heat-sealed and further sewn with the conductive thread (16), the net-like shield material is present in the koguchi. It is possible to reliably prevent the leakage of electromagnetic waves from both sides.

Regarding the remaining openings, the upper and lower sides of the band do not have the heat-sealable insulating layer (13) and the conductive layer is not formed.
The exposed zone (14), (14) is exposed, and the conductive adhesive tape (15) is provided on one of the exposed zones (14), (14). In the state where the electronic component (2) is contained inside and the opening is closed, the electromagnetic wave shielding property is still secured.

Therefore, according to the present invention, the case (3) does not require any special electromagnetic wave shielding measures, or
Even if the electromagnetic wave shielding measures are taken in (3), a reliable omnidirectional electromagnetic wave shielding property can be obtained only by taking simple measures.

The enclosure containing the electronic component (2) in the bag (1) occupies almost no space beyond the space occupied by the electronic component (2) because the bag (1) is flexible, and therefore the electronic device. It can be accommodated without enlarging the housing (3). Moreover, since the bag (1) is flexible, it is possible to prepare electronic parts of various sizes and shapes by preparing the bag (1) of several sizes.
(2) can be accommodated freely.

[0028]

EXAMPLES The present invention will be further described with reference to examples.

Example 1 FIG. 1 is a perspective view showing an example of an electromagnetic wave shielding surrounding bag of the present invention comprising a bag (1), the front side being cut away. FIG. 2 is a schematic explanatory view showing an example of the enclosure of the present invention and an electronic device incorporating the enclosure.

Insulator layer made of polyvinyl chloride film
Conductor layer consisting of resin-coated aluminum foil on (11) (12)
The resin coating layer side of the
A heat-sealable insulating layer (13) made of low-density polyethylene is partially provided on the surface opposite to the resin coating layer side of (12), and the outer layer: insulating layer (11) intermediate layer: conductor Inner layer of layer (12): A multilayer sheet having a layer structure of the heat-sealable insulating layer (13) was produced.

In this case, the exposed zone (1) where the conductor layer (12) is exposed without the heat-sealable insulating layer (13) is provided on both sides which become the opening when the multilayer sheet is folded in two.
4) and (14).

Next, this multi-layer sheet is folded in two so that the heat-sealable insulating layer (13) side is on the inside, and both side zones when folded in two are heat-sealed,
The band was sewn using a conductive yarn (16) obtained by copper-plating a polyester fiber yarn and further nickel-plating the yarn as the upper yarn and the lower yarn. If necessary, an insulating tape (17) may be attached from above the exposed portion of the sewing machine-sewn conductive thread (16) to complete insulation.

Exposed bands (14), (1
On one side of 4), a conductive agent conductive adhesive tape (15) made of a sheet formed by applying an adhesive agent containing conductive particles such as silver on both sides of the base film is attached, and the conductive agent is applied. A release paper as an example of the release sheet (18) was laminated on the conductive adhesive tape (15).

In the bag (1) thus obtained, an electronic circuit board as an example of the electronic component (2) is housed with the tip side of the flat cable protruding from the opening, and then the peeling property is maintained. After peeling off the sheet (18), the opening was pressure-bonded and sealed with a conductive agent conductive adhesive tape (15) to form an enclosure. Next, this enclosure was incorporated into the housing (3) of the electronic device.

[0035]

EFFECTS OF THE INVENTION In the electromagnetic wave shielding surrounding bag of the present invention, the electromagnetic wave shielding property of the upper surface, the lower surface and the folded side of the bag (1) is perfect, and both side bands of the remaining three sides. Also in regard to the above, since it is heat-sealed and further sewn with the conductive thread (16) by the sewing machine, the leakage of electromagnetic waves from the both side edges is surely prevented. With respect to the remaining openings, the upper and lower sides thereof are the exposed areas (14) and (14) of the conductor layer (12), and the openings are formed by the conductive adhesive tape (15) provided there. Since it is closed, the electromagnetic wave shielding property is secured. Therefore,
The enclosure in which the electronic component (2) is contained in the bag (1) has excellent electromagnetic wave shielding properties.

Therefore, even if no special electromagnetic wave shielding measures are applied to the housing (3), or even if the electromagnetic wave shielding measures are applied to the housing (3), simple measures can be taken to achieve reliable omnidirectional Electromagnetic wave shielding property can be obtained.

In addition, the enclosure containing the electronic component (2) in the bag (1) hardly occupies a space exceeding the space occupied by the electronic component (2) because the bag (1) is flexible. Therefore, the electronic device can be accommodated without enlarging the housing (3). Also, since the bag (1) is flexible, it is possible to accommodate electronic components (2) of various sizes and shapes by preparing the bags (1) of several sizes.

In addition, the bag (1) can be continuously and efficiently manufactured, and there is an advantage that the manufacturing cost is small because a mold or the like is not required.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an electromagnetic wave shielding surrounding bag of the present invention including a bag (1), in which a front side is cut out and displayed.

FIG. 2 is a schematic explanatory view showing an example of an enclosure of the present invention and an electronic device incorporating the enclosure.

[Explanation of symbols]

(1) ... bag, (11) ... insulator layer, (12) ... conductor layer, (13) ... heat sealable insulator layer, (14) ... exposed zone, (15) ... conductive adhesive tape, ( 16) ... Conductive thread, (17) ... Insulating tape, (1
8) ... Peelable sheet, (2) ... Electronic parts, (3) ... Case

Claims (4)

[Claims] 1. An insulator layer (11) as an outer layer, a conductor layer (12) as an intermediate layer, and a heat-sealable insulator layer as an inner layer.
A multi-layered sheet consisting of (13) is folded in two so that the heat-sealable insulating layer (13) side is on the inside, and both side bands when folded in half are heat-sealed and conductive thread (16) The upper and lower edges of the remaining opening are sewn by the sewing machine with the heat sealable insulation layer (13) and the exposed conductor layers (12) are exposed zones (14), (14). A bag for electromagnetic wave shielding, comprising a bag (1) having a conductive adhesive tape (15) provided on one of the exposed zones (14), (14). 2. The electromagnetic wave shielding surrounding bag according to claim 1, wherein an insulating tape (17) is adhered onto the exposed portion of the sewing machine-sewn conductive thread (16) on the outer surface thereof. 3. An enclosure comprising an electronic component (2) inside a bag (1) according to claim 1. 4. An electronic device in which the enclosure according to claim 3 is incorporated in a housing (3).