JPH08293694A - Noise shield member and manufacture method thereof - Google Patents

Abstract

PURPOSE: To obtain a noise shield member and a manufacturing method thereof which is easy to adapt it to a required shape and to produce it, by depositing a fine powder of carbon to cover the surface of a base for shielding. CONSTITUTION: A base 10 for shielding the noise is made of a metal or synthetic resin like a plate and, if necessary, may be shaped like a cover surrounding required area of an electronic apparatus for shielding the noise. One side of the base 10 is coated with an adhesive agent 11 and fine powder of carbon 12 is deposited to cover the surface of the base 10 on this adhesive agent layer to form a noise shield member 13 of specified thickness. The size of the powder 12 is 0.7mm or less and it is made by chopping carbon fibers into 2-3mm long and pulverized into a fine powder of 0.7mm or less by a pulverizer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention shields an electronic device to prevent noise from being generated in the electronic device due to an external electromagnetic wave or external noise, or the electromagnetic wave emitted from the electronic device to be transmitted to another electronic device. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise shielding member that prevents a device from generating noise and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, there is a use example of a carbon material as a noise shielding member. In this use example, a plain woven cloth is formed by using carbon fiber, and the carbon woven cloth is directly coated on a necessary portion, Alternatively, it is used by being attached to the inside of a cover that covers a necessary portion.

However, in such a state of use, it is incomplete to add the shielding member to the shape required for shielding,
In addition, since it takes time to manufacture, there is a problem that the cost increases.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a noise shielding member which is easy to fit a required shape to a shielding member and is easy to manufacture, and a manufacturing method thereof.

[0005]

According to a first aspect of the present invention, there is provided a noise shielding member formed by coating fine carbon powder on the surface of a base member used for shielding. .

The invention according to claim 2 of the present invention is characterized in that it is a method of manufacturing a noise shielding member, which is formed by adhering carbon fine powder formed by crushing a carbon material to a base member.

According to a third aspect of the present invention, in addition to the structure of the first or second aspect of the invention, the noise shielding member is a fine powder of carbon fine powder having a size of 0.7 mm or less, or a manufacturing method thereof. Is characterized in that.

[0008]

Since the noise shielding member of the present invention is formed by coating the base member used for shielding with fine carbon powder, the shape of the base member used for shielding is the shape required for noise shielding. In this case, it is possible to easily cover the fine carbon powder with the required shape, and as a result, it is possible to effectively shield the electronic device from noise by the fine carbon powder. Further, since the shielding member is formed by adhering the carbon fine powder, the carbon fine powder is not peeled off, the manufacturing is simplified, and the cost can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a noise shielding member, and in FIG.
The base member 10 used for noise shielding may be formed in a plate shape from metal, synthetic resin, or the like, and if necessary, may be formed in a cover shape surrounding a required noise shielding portion of an electronic device.

An adhesive 1 is provided on one surface of the plate-shaped base member 10 described above.
1 is applied, and carbon fine powder 12 is applied to the adhesive layer with a predetermined thickness so as to cover the surface of the plate-shaped base member 10.
The noise shielding member 13 is formed by adhering in a plane with a thickness of 0.5 to 1.0 mm.

The above-mentioned carbon fine powder 12 has a size of 0.7 mm.
The following is used, and preferably a fine powder having a size of 0.5 mm or less is used. The carbon fine powder 12 is formed by adding 2-3 carbon fibers.
Finely pulverized to a size of mm and further pulverized by a pulverizer to obtain fine powder of 0.5 mm or less. Further, the adhesion of the carbon fine powder 12 can be easily obtained by adopting a well-known electrostatic adhesion method. However, as another means, the plate-like base member 11 coated with the adhesive 11 is carbon fine powder. It may be pressed and attached in a container accommodating 12, and a predetermined thickness can be obtained by repeating the application of the adhesive 11 and the pressing of the carbon fine powder 12.

The noise shielding member 1 thus constructed
In No. 3, the carbon fine powder 12 is not peeled off, and an effective noise shielding effect can be obtained.

FIG. 2 shows carbon fine powder 1 on both sides of the shielding base member 10.
An example of the noise shielding member 13 to which 2 is attached is shown, and the carbon fine powder 12 can be attached to both surfaces and used in this way.
Further, although the embodiment has a plate shape, for example, even if it is a box-shaped or other shape cover, the carbon fine powder 12 can be attached thereto, and the noise shielding member 13 having a free shape can be formed. .

[Brief description of drawings]

FIG. 1 is a sectional view of a noise shielding member.

FIG. 2 is a sectional view of a noise shielding member of another example.

[Explanation of symbols]

 10 ... Plate-shaped base member 11 ... Adhesive agent 12 ... Carbon fine powder 13 ... Noise shielding member

Claims (3)

[Claims] 1. A noise shielding member formed by coating fine carbon powder on the surface of a base member used for shielding. 2. A method of manufacturing a noise shielding member, which comprises adhering to a base member carbon fine powder formed by crushing a carbon material. 3. The noise shielding member according to claim 1, wherein the carbon fine powder is a fine powder having a size of 0.7 mm or less, or a method for manufacturing the noise shielding member.