JPH0243464Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a filter device that is attached to devices and parts such as electronic parts and mechanical equipment that dislike dust.

[Prior Art] Conventionally, a filter device disclosed in Japanese Utility Model Application Laid-open No. 61-76598 is known as a filter device used in a device that dislikes dust, such as a magnetic disk device which is an electronic component.

[Problems to be solved by the invention] However, the device disclosed in the above-mentioned Utility Model Application No. 61-76598 provides an adhesive layer only on one side of the film, and this adhesive layer is used to attach the filter paper to the casing. Since the film was also used for adhesive fixation, there was a problem in that the film had to be made large.Also, since the filter paper had to be small compared to the size of the film, the effective filtration area of the filter paper was small. There was a problem.

The present invention aims to solve the above problems.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has adhesive layers on both sides and a through hole in the center, and one adhesive layer has the same adhesive layer as the film. It is formed by gluing and fixing wide or small width filter paper.

[Function] According to the present invention having the above configuration, since the film surface is not located on the upper surface of the filter paper, the sucked air is diffused outward as it moves upward, increasing the effective filtration area of the filter paper. becomes possible.

[Example] An example of the implementation of the present invention will be described in detail with reference to the drawings. Adhesive layers 2 and 3 are provided on both sides of a film 1 made of synthetic resin or aluminum, and a transparent film 1 is provided in the center of the film 1. Drill hole 4. and,
A filter paper 5 having a diameter larger than the diameter of the through hole 4 and having the same width as the film 1 or slightly narrower than the film 1 is placed so as to cover the through hole 4 with one adhesive layer 2 interposed therebetween. If the filter paper 5 has the same width as the film 1, seal the back side of the filter paper 5 along the outer periphery of the through hole 4 with a sealing material 6 (Fig. 2), or If the width of the film 5 is smaller than that of the film 1, apply the sealing material 6 along the outer periphery of the filter paper 5.
The filter 7 is formed by sealing (FIG. 3). In addition, 8 in the figure is a release paper adhered to the other adhesive layer 3 of the film 1.

The filter 7 having the above-mentioned structure is adhered to the release paper 8 until it is attached to a dust-free device or part, such as an electronic component or a mechanical device. 8 is peeled off and used.

4 and 5 are longitudinal cross-sectional views of the filter of the present invention used as a breathing filter for a magnetic disk device in an electronic component, in which a recess 10 is formed inside the casing 9 of the magnetic disk device A. At the same time, a plurality of breathing holes 11 are drilled in the casing 9 on the surface of the recess 10, and the filter 7 of the present invention is peeled off from the release paper 8 and placed on the casing via the adhesive layer 3 so as to cover the recess 10. It is glued and fixed to the inside of 9. Therefore, even if the adhesive fixing surface of the filter 7 of the present invention is narrow, the filter paper 5 can be adhesively bonded over almost the entire width thereof, so that the maximum filtration effect can be obtained in a small space. In FIG. 4, 12 is a magnetic disk, and 13 is a cover.

[Effects of the invention] Since the present invention is as described above, the film surface is not located on the top surface of the filter paper at all, so even if the through holes are small, the sucked air will diffuse to the outside of the top of the filter paper. Therefore, the effective filtration area of the filter paper is large, and since the width of the filter paper and the width of the film with adhesive layers on both sides are almost the same, maximum filtration effect can be obtained in a small space. This allows the filter to be made smaller, and is particularly suitable for use in electronic parts and mechanical devices that tend to be made smaller.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a longitudinal sectional view, and Fig. 3 is a longitudinal sectional view showing another embodiment of the sealing position of the sealing material.
FIG. 4 is a vertical cross-sectional view of the filter of the present invention used as a breathing filter for a magnetic disk device, and FIG. 5 is an enlarged vertical cross-sectional view of the same essential parts. In the figure, 1 is a film, 2 and 3 are adhesive layers, 4 is a through hole, 5 is a filter paper, and 6 is a sealing material.

Claims (1)

[Scope of utility model registration request] A through hole is made in a film that has adhesive layers on both sides, and a piece of filter paper with a diameter larger than the diameter of the through hole and having the same width as the film or a small width is placed so as to cover the through hole with the adhesive layer on one side. A filter device that is made by adhering to a layer and sealing the outer peripheral edge of a through hole or the outer peripheral edge of a filter paper with a sealing material.