JPS6297187A - Disk cartridge - Google Patents

Abstract

PURPOSE:To eliminate the sag of an elastic bar at its both sides and to secure the complete cleaning of a disk, by increasing the height of a projection formed on the inner face of a case at its both end parts compared with the height at its inside part. CONSTITUTION:Many straight projections 8 are provided at the upstream side in the disk revolving direction at a head inserting slot 5 of an upper case 1a. Here the projections 8 at both ends are slightly higher than other projections 8. A cleaning sheet 10 made of a mixed unwoven fabric of both rayon and polyester bibers is put into a control rib 9. A projection support part 12, a sticking preventing projected streak 13 and an elastic bar 14 formed by folding a plastic sheet are set on the inner surface of a lower case 1b at the positions approximately opposite to the projections 8 of the case 1a respectively. Then the sheet 10 is added. Thus a magnetic disk 2 is held light and elastically by the upper and lower sheets 10. Then the surface of the disk 2 is cleaned by those sheets 10 as the disk 2 is rotated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disk cartridge such as a magnetic disk cartridge or an optical-magnetic disk cartridge, and particularly comprises an upper case and a lower case forming a head insertion opening. A cartridge case with a cleaning sheet pasted on the inside.

The present invention relates to a disk cartridge including a disk rotatably housed within the cartridge case.

[Conventional technology]

FIG. 10 is an exploded perspective view of a conventional magnetic disk cartridge.

As shown in this figure, magnetic head insertion openings 103 are formed at predetermined positions in the upper case 101 and the lower case 102 so as to face each other. Several protrusions 104 are provided on the inner surface of the upper case 101, while elastic pieces 105 are fixed to the inner surface of the lower case 102 so as to face the protrusions 104.

A flexible magnetic disc 07 is rotatably housed between the upper case lot and the lower case 102 with a cleaning sheet 106 in between. Therefore, the protrusion 104
The magnetic disk 107 is lightly held between the upper and lower cleaning sheets 106 and the elastic piece 105, and as the magnetic disk 107 rotates, its surface becomes tfJI.
It is designed to be ff.

[Problems to be solved and solved by the invention] As described above, the magnetic disk 107 is lightly held between the upper and lower cleaning sheets 106, and the protrusion 104 and the elastic piece 105 function to support this sandwiched state. ' Since the elastic piece 105 is made of a plus deck sheet, its both ends sag slightly, and this sag becomes more noticeable as the width of the elastic piece 105 becomes longer.

By the way, conventional magnetic disk cartridges are made of elastic pieces!
The heights of the protrusions 104 provided at positions facing the protrusions 05 are all the same. Therefore, the protrusions 104 on both sides cannot cope with the sag of the elastic piece 105 mentioned above, and the magnetic disk 107 is not able to cope with the sagging of the elastic piece 105 at the position corresponding to the center of the elastic piece 105.
The upper and lower cleaning sheets 10 can be cleaned thoroughly at the positions corresponding to both ends of the elastic piece 105.
6, the magnetic disk 107 cannot be held properly, and therefore a sufficient leaning effect cannot be obtained.

The purpose of the present invention is to eliminate such drawbacks of the prior art,
[Means for Solving the Problems] To provide a disk cartridge with excellent cleaning effect. In order to achieve the above-mentioned object, the present invention comprises an upper case and a lower case forming a head insertion slot. A cartridge case with a cleaning sheet pasted on the inside,
an elastic piece made of, for example, a plastic sheet attached to either the upper case or the lower case and tilted toward the other case; In a disc cartridge in which a disc is held between the cleaning sheet and a protrusion formed of, for example, a plurality of protrusions provided on the inner surface of the other case so as to face the other side, the height of the protrusion is as follows: It is characterized by being slightly higher at the inner and outer circumferential sides of the disk in the radial direction from the center.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

1 to fnT are illustrations for explaining the magnetic disk cartridge according to the first embodiment of the present invention, so the first
The figure shows an exploded perspective view of the disk cartridge, Figure 2 is a bottom view of the upper case, Figure 3 is an enlarged sectional view taken along the line E in Figure 2, and Figure 4 shows the cleaning sheet attached to the case. Bottom view, No. l! Top view of the lowering case,
FIG. 6 is a plan view showing a cleaning sheet attached to the lower case, and FIG. 7 is an enlarged sectional view of the vicinity of the elastic piece of this magnetic disk cartridge.

The magnetic disk cartridge includes a cartridge case 1, a magnetic disk 2 rotatably housed in the cartridge case 1, and a shutter 3 slidably supported by the cartridge case 1.
It is mainly composed of.

The cartridge case 1 is composed of an upper case 1a and a lower case 1b, which are made of hard synthetic resin such as ABS resin.

Lower case! Approximately in the center of b is an opening 4 for inserting the rotational drive shaft.
is formed, and a rectangular head insertion opening 5 is provided near it, and a head insertion opening 5 is similarly provided in the upper case la. In the vicinity of the front surfaces of the upper case la and the lower case 1b, recesses 6 that are slightly lowered in order to restrict the sliding tube (2) of the shutter 3 are formed respectively, and the head is inserted into the intermediate position of the recesses 6. Port 5 has been opened.

A guide groove 7 extending along the sliding direction of the shutter 3 is formed near the front surface of the upper case 1a.

As shown in FIG. 2, a large number of linearly extending protrusions 8 are formed on the upstream side of the head insertion port 5 of the upper case 18 in the disk rotational direction, and as shown in FIG. Two of them on both sides are wider than the protrusion 8 on the inside.

An arc-shaped regulating rib 9 that regulates the storage position of the magnetic disk 2 is protrudingly provided on the inner surface of the upper case 1a, and a portion of the regulating rib 9 passes through the end of the four parts 19, and the regulating rib 1] extends around the concave portion 19. It also serves as a reinforcement.

As shown in FIG. 4, on the inside of this regulating rib 9.

For example, the cleaning sheet 10 is approximately C-shaped and is made of a nonwoven fabric made of a mixture of rayon fiber and polyester fiber.
When the head insertion port 5 is inserted, the width W1 of the opening provided at the position corresponding to the head insertion port 5 of the cleaning sheet IO is designed to be slightly larger than the width W2 of the head insertion port 5. By placing the cleaning sheet 10 on the inner surface of the upper case la, the protrusion 8 is covered, and the peripheral portion of the cleaning sheet 10 is heat-fused to the upper case Ia by ultrasonic welding or the like! tt11 is done. As mentioned above, the recess 19 of the upper case la has a sufficient width, so that the opening of the cleaning sheet 10 has four parts 1 as shown in FIG.
The lower case can be thermally melted in 9-@11 as shown in Figure 5! A protruding strip 13 for preventing sticking, such as a protruding strip support portion 12, is provided on the inner surface of the case IQ at a position substantially facing the protrusion 8 of the raised case IQ. 6th [
! d and FIG. 7, the base 15 of the elastic piece 14 formed by bending a plastic sheet is fixed to the inner surface of the lower case 1b near the support part 12 by an appropriate means such as adhesive or heat fusion. The free end 16 of the extending elastic piece 14 is supported by the support member 2 to maintain its inclined state.

A regulating rib 9 is also provided protruding from the inner surface of the lower case lb.

A cleaning sheet 1o is distributed inside it. The width W1 of the opening provided in the cleaning sheet 10 at a position corresponding to the head insertion opening 5 is as follows.

It is designed to be slightly larger than the #lI width W2 of the head insertion port 5. Sixth! ! By MFRing the cleaning sheet 10 to the inside of the lower case as shown in FIG. The heat sealing 11 is omitted near the area.

When a magnetic disk cartridge is assembled by combining the upper case 1a and the lower case 1b, as shown in FIG. 7, the cleaning sheet 1-10 on the lower case lh side is partially lifted by the elastic piece 14, and the upper case The protrusion 8 provided on 1a pushes it up a little, and the magnetic disk 2 is lightly and elastically held between the upper and lower cleaning sheets 10 and 10.

As the magnetic disk 2 rotates, the disk surface is cleaned by the cleaning sheet 10.

8 and 9 are for explaining a magnetic disk cartridge according to a second embodiment of the present invention, FIG. 8 is a bottom view of the upper case of the disk cartridge, and FIG. 9 is a bottom view of the upper case of the disk cartridge.
The figure is an enlarged sectional view taken along the Rollo line in FIG. 8.

In the case of this embodiment, the planar shape of the protrusion 8 formed on the inner surface of the upper case LA is square as shown in FIG.
As shown in FIG. 9, its cross-sectional shape is designed such that the height of both end portions 8a is slightly higher than the middle portion 8b, and an inclined portion 8C is formed between both end portions 8a and the middle portion 8b.

The other configurations of the magnetic disk cartridge are the same as those of the first embodiment, so a description thereof will be omitted.

Said first rib: In the embodiment, a linear rib extending substantially along the rotating direction of the disk was used as the protrusion formed on the inner surface of the upper case.
A rib-shaped protrusion extending M may be provided.

[Effects of the Invention] As described above, the present invention addresses the droop at both ends of the elastic piece by making the heights of both ends of the protrusion formed on the inner surface of the case higher than the inner part. I can do it. Therefore, a leaning effect can be reliably obtained both at the inner and outer circumferential portions of the disk, and good recording and reproduction can be performed.

[Brief explanation of drawings]

1 to 7 are for explaining a magnetic disk cartridge according to a first embodiment of the present invention, FIG. 1 is an exploded perspective view of the disk cartridge, FIG. 2 is a bottom view of the upper case, Figure 3 is an enlarged cross-sectional view taken along line E in Figure 2, Figure 4 is a bottom view showing the cleaning sheet attached to the upper case, Figure 5 is a plan view of the lower case, and Figure 6 is the bottom view of the lower case. FIG. 7 is a plan view showing the state in which the cleaning sheet is attached, and FIG. 7 is an enlarged sectional view of the vicinity of the elastic piece of this magnetic disk cartridge. 8 and 9 are for explaining a magnetic disk cartridge according to a second embodiment of the present invention, FIG. 8 is a bottom view of the upper case of the disk cartridge, and FIG. 9 is a bottom view of the upper case of the disk cartridge.
The figure is an enlarged sectional view taken along the Rollo line in FIG. 8. Figure 10 shows the molecule 7 of a conventional magnetic disk cartridge.
f is a perspective view. ■・・・Cartridge case, 1a・・・・・・
upper case. 1b...Lower case, 2...Magnetic disk, 5...Head insertion slot, 8...Protrusion, 10...Cleaning sheet, 12...
...Support part, 13...Convex strip. Figure 2 Figure 3 Figure 4 Figure 5 Cause Figure 6 Figure 7/316 14 12 75 lυ Figure 8 Figure 9 Figure 1O

Claims (2)

[Claims] (1) A cartridge case consisting of an upper case and a lower case forming a head insertion opening, each with a cleaning sheet affixed to its inner surface, and a disk rotatably stored within the cartridge case. an elastic piece that is attached to one of the cases and presses the cleaning sheet toward the other case;
In a disc cartridge in which a disc is sandwiched between the elastic piece and a protrusion provided on the inner surface of the other case so as to face each other through the cleaning sheet, the height of the protrusion is at the center of the disc in the radial direction. A disc cartridge characterized by being higher at positions closer to the inner circumference and outer circumference. (2) The disk cartridge according to claim (1), characterized in that a protrusion for preventing sticking is formed on the inner surface of the case on the side where the elastic piece is attached.