JPH0590659U - Disk cartridge - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a disk cartridge in which the shell opposite to the tip of a drive pin of a drive device is pushed up by the drive pin and the cleaning force of the magnetic disk by the liner is not lowered. . A liner for cleaning the magnetic disk is provided on each of the inner surfaces of the upper shell and the lower shell of a cartridge body that rotatably accommodates the magnetic disk.
In a disk cartridge in which a drive pin of a drive device is inserted into a hub hole of the magnetic disk from the lower shell side or the upper shell side to rotate the magnetic disk, an upper shell facing the tip of the drive pin. Alternatively, the lower shell is provided with an insertion through hole at the tip portion, and a ring-shaped dustproof rib surrounding the insertion through hole is provided on an inner surface of the shell in which the insertion through hole is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly to a disk cartridge in which the shell on the side facing the tip of a drive pin of a drive device is not pushed up by the drive pin and the magnetic disk cleaning force of the liner is not reduced.

[0002]

[Prior Art]

 As shown in FIGS. 3 and 4, a general disk cartridge has a magnetic disk 1 rotatably housed in a cartridge body composed of an upper shell 3a and a lower shell 3b. A liner 5 is provided, and when the magnetic disk 1 rotates, it slides on the liner 5 so that dust and the like adhering to the surface of the magnetic disk 1 is wiped by the liner 5 (cleaned). It is done like this. Further, the magnetic disk 1 has a circular cup-shaped hub 2 having a shallow bottom, and a substantially square hub hole 21 is formed in the bottom surface of the hub 2, so that an external drive is used when the disk cartridge is used. A drive pin 6 having a substantially square cross section of a device (not shown) is fitted into the hub hole 21 from the center hole 8 formed in the lower shell 3b, and the magnetic disk 1 is rotated by the drive pin 6. At this time, the tip portion 61 of the drive pin 6 comes into contact with the center plate 9 made of a wear resistant material attached to the inner surface of the upper shell 3a facing the drive pin 6.

[0003]

[Problems to be solved by the device]

 However, as shown in FIG. 3, the drive pin 6 of the drive device described above pushes up the upper shell 3a when its front end portion 61 abuts on the center plate 9, and thereby the upper shell 3a and the lower shell 3b are separated from each other. Has the effect of widening the space between. Therefore, a gap may occur between the magnetic disk 1 and the liner 5 provided on each of the inner surfaces of the upper shell 3a and the lower shell 3b, and the cleaning force of the magnetic disk 1 by the liner 5 may be reduced.

Accordingly, an object of the present invention is to provide a disk cartridge in which there is no risk that the shell on the side facing the tip of the drive pin of the drive device is pushed up by the drive pin to reduce the cleaning power of the magnetic disk by the liner. To provide.

[0005]

[Means for Solving the Problems]

 The present invention provides liners for cleaning the magnetic disk on the inner surfaces of the upper shell and the lower shell of a cartridge body that rotatably accommodates the magnetic disk. Further, the magnetic disk is installed from the lower shell side or the upper shell side. In the disk cartridge in which the drive pin of the drive device is inserted into the hub hole of the drive unit to rotate the magnetic disk, the tip of the drive pin is inserted into the upper shell or the lower shell facing the tip of the drive pin. The above object is achieved by providing a disk cartridge having a through hole and a ring-shaped dustproof rib surrounding the insertion through hole on the inner surface of the shell having the insertion through hole. It was done.

[0006]

[Action]

 According to the disk cartridge of the present invention, the drive pin of the drive device is inserted into the hub hole of the magnetic disk from the lower shell side (or the upper shell side), and the tip portion thereof is inserted into the upper shell (or the lower shell). It is rotatably inserted and penetrated in the provided insertion through hole, and the magnetic disk is rotated by the drive pin. The dustproof rib substantially closes the gap between the inner surface of the shell around the insertion through hole and the hub surface of the magnetic disk, and prevents dust and the like entering through the insertion through hole from diffusing onto the magnetic disk. When it rotates, the magnetic disk slides on the liner, and the surface of the magnetic disk is cleaned by the liner.

[0007]

【Example】

 An embodiment of the disc cartridge of the present invention will be described below with reference to the drawings. 1 is a plan view of the upper shell side of an embodiment of the disk cartridge of the present invention as viewed from the inside, and FIG. 2 is a sectional side view showing a state in which a drive pin is inserted into a magnetic disk in the embodiment of FIG. is there.

As shown in FIGS. 1 and 2, the disk cartridge of the present embodiment cleans the magnetic disk 1 on the inner surfaces of the upper shell 3a and the lower shell 3b of the cartridge body that rotatably accommodates the magnetic disk 1. The liner 5 is provided, and the drive pin 6 of the drive device is inserted into the hub hole 21 of the magnetic disk 1 from the side of the lower shell 3b to rotate the magnetic disk 1.

Therefore, in the disc cartridge of this embodiment, as shown in FIGS. 1 and 2, the tip portion 61 is inserted and penetrated into the upper shell 3 a facing the tip portion 61 of the drive pin 6. A ring-shaped dustproof rib 7 surrounding the insertion through hole 4 is provided on the inner surface of the shell 3a in which the hole 4 is provided and the insertion through hole 4 is provided.

To further explain the disc cartridge of the present embodiment, the insertion through hole 4 is a circular hole into which the distal end portion 61 of the drive pin 6 is inserted and penetrated, and its diameter is made as small as possible. There is. Further, the dustproof rib 7 has a short cylindrical shape and is provided so as to protrude from the inner surface of the shell 3a in the state, and is formed in the recessed portion of the hub 2 having a shallow cup opening to the upper shell 3a side of the magnetic disk 1 (in the cup). ). That is, the dustproof rib 7 has an inner diameter larger than the diameter of the insertion through hole 4, an outer diameter smaller than the inner diameter of the recess of the hub 2, and a height higher than that of the inner surface of the upper shell 3a. The distance from the bottom surface of the recess is approximately equal to that of the bottom surface. The dustproof rib 7 may be provided integrally with the upper shell 3a, or may be attached to the inner surface of the upper shell 3a as a separate body. When the dustproof rib 7 is separate from the upper shell 3a, its material is not particularly limited, but is preferably polycarbonate, polyacetal, or the like.

In the disk cartridge of the present embodiment configured as described above, since the shell on the side facing the tip of the drive pin of the drive device is not pushed up by the drive pin, the magnetic disk There is no gap between the magnetic disk and the liner, and dust and the like entering through the insertion through hole are prevented from diffusing into the magnetic disk (main body) at the hub portion by the dust-proof ribs. The environmental conditions of (main body) are prevented from deteriorating. Therefore, when the drive pin of the drive device is inserted into the hub hole of the magnetic disk and the magnetic disk rotates, the cleaning of the magnetic disk is sufficiently performed by the liner and the cleaning force of the liner is reduced. There is no danger of

The present invention is not limited to the above embodiment, and for example, the dustproof rib may have a ring shape other than a circular shape. Further, the above embodiment is an example in which the shell facing the front end portion of the drive pin is the upper shell, but the shell may be the lower shell. A hole and the dustproof rib may be provided on the lower shell.

[0013]

[Effect of the device]

 In the disk cartridge of the present invention, there is no risk that the shell of the drive device facing the tip of the drive pin is pushed up by the drive pin and the cleaning force of the magnetic disk by the liner is reduced.

[Brief description of drawings]

FIG. 1 is a plan view of an upper shell side of an embodiment of a disk cartridge according to the present invention as viewed from the inside.

2 is a cross-sectional side view showing a state in which a drive pin is fitted into a magnetic disk in the embodiment of FIG.

FIG. 3 is a view corresponding to FIG. 1 in a conventional disk cartridge.

FIG. 4 is a view corresponding to FIG. 2 in a conventional disc cartridge.

[Explanation of symbols]

 1 magnetic disk 2 hub 21 hub hole 3a upper shell 3b lower shell 4 insertion through hole 5 liner 6 drive pin 61 tip part 7 dust-proof rib

Continuation of the front page (72) Creator Mami Murata 2606 Akabane, Kai-cho, Haga-gun, Tochigi Prefecture Kao Co., Ltd. Information Technology Research Institute

Claims (1)

[Scope of utility model registration request] 1. A liner for cleaning the magnetic disk is provided on each of the inner surfaces of an upper shell and a lower shell of a cartridge main body in which a magnetic disk is rotatably accommodated, and the magnetic disk is provided from the lower shell side or the upper shell side. In a disk cartridge in which a drive pin of a drive device is inserted into a hub hole of the drive unit to rotate the magnetic disk, an insertion through hole of the tip portion is formed in an upper shell or a lower shell facing the tip portion of the drive pin. A disk cartridge characterized in that a ring-shaped dustproof rib surrounding the insertion through hole is provided on the inner surface of the shell provided with the insertion through hole.