JPH0411269Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to a liner for floppy disks, and in particular uses a hard case for the jacket.
Regarding liners such as 3.5 inch floppies.

(Prior art and its problems) In general, a floppy disk has a liner made of non-woven fabric interposed between the magnetic disk and the jacket, and this liner cleans foreign matter such as dust and magnetic powder inside the disk and It works to protect the disk.

However, when using a hard case made of injection molded ABS resin for the jacket that makes up the floppy disk, such as with a 3.5-inch floppy disk, if the liner is fixed tightly against the inner surface of the case, the case will not fit. Since there is no flexibility, variations in the thickness of the liner directly lead to incomplete contact between the magnetic disk and the liner, resulting in the problem that cleaning cannot be performed sufficiently. For this reason, conventional methods have been taken to improve contact by interposing a tongue made of polyester film or the like between the liner and the case to press the liner against the magnetic disk. However, this method requires the tongue to be pasted at a precise location on the case, as well as the liner must be laminated on top of the tongue and specific parts of the liner must be welded, making the process extremely complicated and resulting in defective products. It was easy to occur.

On the other hand, a method to improve the contact between the liner and the magnetic disk without using tongues was developed in 1988.
It is disclosed in Publication No. 60375. The means are
A liner is used in which a film-like reinforcing material is adhered to one side of a nonwoven fabric and a convex portion is formed on the other side of the nonwoven fabric to ensure contact with a magnetic disk. Since this liner allows contact between the liner and the magnetic disk through the film-reinforced protrusion, there is no need to use a tongue piece, which is thought to make the process of assembling the floppy disk extremely simple. . However, in reality, if a soft film is used to make up the liner, the shape retention of the liner after forming the convex portions is insufficient, and if a hard film is used, it lacks cushioning properties. The problem of incomplete contact between the liner and the magnetic disk due to variations in the thickness of the liner could not be solved. In particular, when a plurality of convex portions are formed, if the heights of the apexes of the convex portions are not precisely aligned, the contact between the magnetic disk and the liner may be incomplete.

(Purpose of the invention) The present invention was made in order to eliminate the drawbacks of the above-mentioned conventional technology, and a sufficient cleaning effect can be obtained by improving the contact with the magnetic disk.
Another object of the present invention is to provide a liner that can simplify the process of assembling a floppy disk.

(Structure and operation of the invention) The invention will be described below based on embodiments and with reference to the drawings. FIG. 1 is a plan view of the liner of the present invention, and FIG. 2 is a cross-sectional model view of the tongue portion of the liner of the present invention when cut along line AA' in FIG. 1.
3 and 4 are cross-sectional model views showing other examples of the tongue portion of the liner of the present invention.

The present invention is a floppy disk liner made of a sheet 3 made by laminating a nonwoven fabric 1 and a film 2, and in which a tongue piece 4 formed by cutting out a part of the sheet 3 is lifted toward the nonwoven fabric side. It is.

That is, in the present invention, a part of the sheet 3 forming the liner is cut out, and the tongue piece 4 is attached to the liner itself.
Since the non-woven fabric surface of the tongue piece 4 is always in contact with the magnetic disk, a stable cleaning effect can be obtained, and there is no need to provide a separate tongue piece, so it is only necessary to attach the liner to the case. Therefore, the assembly process of the floppy disk can be extremely simplified. In addition, even if the film is made of a hard film that retains its shape, since it is used in the form of tongues, there is a large degree of freedom in the vertical direction, and there is no need to worry about loss of cushioning properties as would be the case with convex molding. It is.

The nonwoven fabric 1 used in the present invention is not particularly limited, and those obtained by known nonwoven fabric forming methods such as dry method, wet method, and spunbond method can be used, such as rayon, polypropylene, polyester, polyacrylonitrile, etc. A nonwoven fabric made by partially bonding a web made of fibers by thermocompression, or a nonwoven fabric made by bonding with an adhesive, etc. is used. In particular, a nonwoven fabric that does not generate lint and has excellent cleaning and cutting properties can be suitably used in the present invention because it exhibits high performance as a liner.

The film 2 used in the present invention is desirably moldable, has appropriate rigidity, and is heat resistant. This is because in the present invention, after the tongue piece 4 is formed to form a predetermined angle with the liner body, the tongue piece 4 will not become flat or stick to the case even if it is affected by pressure, heat, or static electricity. This is because it is desirable not to do so. In other words, in the present invention, the film 2 acts as a reinforcing material and maintains the shape retention of the tongue piece 4.

Therefore, the film 2 used in this invention has a thickness
Polyester films, polycarbonate films, aluminum sheets, etc. of about 50 to 150 μm are suitable, and particularly preferred are polyimide films, polyether imide films, polyether ether ketone films, polyether sulfonate films, polyphenylene sulfide films, A heat-resistant film such as polysulfonate film is preferable. In addition, these films are designed to prevent the tongue from sticking to the case due to static electricity.
It may contain or be coated with an antistatic agent such as a surfactant or a conductive paint.

The nonwoven fabric 1 and the film 2 are bonded together using an adhesive or the like to form a sheet 3. Thereafter, the sheet 3 is cut into a predetermined shape and attached to the case. The tongue pieces 4 are formed by cutting out a part of the sheet 3 during this cutting. Note that the sheet 3 has a structure in which the nonwoven fabric 1 and the film 2 are adhered, and since the sheet 3 can be moved to the case by a vacuum feed, the process can be automated.

The tongue piece 4 is suitably U-shaped or U-shaped as shown in Fig. 1, but any shape can be used as long as the non-woven fabric surface of the tongue piece 4 makes sufficient contact with the magnetic disk. It may be. Further, the angle between the liner body and the tongue piece 4 is preferably 5° to 15° when assembled into a floppy disk, and if it is less than 5°, the tongue piece 4 cannot be pressed sufficiently against the magnetic disk. If the angle is 15 degrees or more, the rotational torque will become abnormally high. A particularly preferable angle between the liner body and the tongue piece is 8° to 10° when assembled into a floppy disk. Note that the tongue piece 4 may be bent as shown in FIG. 3, or curved as shown in FIG. 4. If the tongue piece 4 is bent or curved in this way, the edge of the tongue piece 4 will not come into direct contact with the magnetic disk, so even if the nonwoven fabric is accidentally peeled off at the edge of the tongue piece 4, the film will not touch the magnetic disk. There is no need to worry about damaging the magnetic disk by coming into contact with it. Furthermore, even if the tongue piece 4 is subjected to stress due to pressure, the bent or curved part acts as a cushion, which prevents the tongue piece from becoming flattened or sticking to the case. However, this tongue piece 4
When bending or curving, the nonwoven surface of the tongue must be on the outside; if the film is bent or curved so that the film surface is on the outside, the film and magnetic disk surfaces will be damaged. .

(Effects of the invention) As described above, the liner of the invention is made of a sheet made of a nonwoven fabric and a film bonded together, and is provided with a tongue piece formed by cutting out a part of the sheet. Therefore, the nonwoven fabric surface of the tongue piece can always be brought into contact with the magnetic disk without sagging due to the film's repulsive elasticity, and a sufficient cleaning effect can be obtained. Furthermore, since the tongue piece constitutes a part of the liner, it is sufficient to simply attach the liner body to the case, which greatly simplifies the assembly process of the floppy disk.

In this way, the liner of the present invention is an extremely useful liner when using a hard case such as a 3.5-inch floppy disk.

[Brief explanation of drawings]

FIG. 1 is a plan view of the liner of the present invention, and FIG. 2 is a cross-sectional model diagram of an example of the tongue portion of the liner of the present invention when cut along line AA′ in FIG.
3 and 4 are cross-sectional model views of other examples of the tongue portion of the liner of the present invention. 1... Nonwoven fabric, 2... Film, 3... Sheet, 4... Tongue piece.

Claims (1)

[Claims for Utility Model Registration] 1. A floppy disc made of a sheet made by laminating a non-woven fabric and a film, and in which a tongue piece formed by cutting out a part of the sheet is lifted to the side of the non-woven fabric. liner. 2. The floppy disk liner according to claim 1, wherein the tongue piece is bent or curved.