JPH0527872U - Disk Cartridge - Google Patents

Abstract

(57) [Summary] Disk cartridge [Purpose] To provide a disk cartridge in which cleaning performance for the medium surface near the inner circumference side of the magnetic disk is improved without applying excessive torque to the magnetic disk during rotation. 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 body in which a magnetic disk is rotatably housed, and one end is attached to the inner surface of the upper shell or the lower shell. In a disk cartridge provided with an elastic sheet-like lifter for lifting the liner through a protruding rib supporting rib provided near the one end, a mounting edge of the lifter on one end and the protruding rib The lifter or the supporting rib is arranged so that the distance between the magnetic disk and the magnetic disk is shorter on the inner peripheral side than on the outer peripheral side.

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 having an improved cleaning property for a magnetic disk.

[0002]

[Prior Art]

 The disc cartridge is usually provided with liners for cleaning the magnetic disc on the inner surfaces of the upper shell and the lower shell of the cartridge main body that rotatably accommodates the magnetic disc. There is an elastic sheet-like lifter to which the side portion is attached and which lifts the liner through a ridge-supporting rib that is provided in the vicinity of the one end portion.

For example, as shown in FIG. 5, a liner 72 is provided on the inner surface 70 a of the stepped recess of the shell 70, and an elastic sheet-like lifter 74 is provided on the inner surface 70 a of the shell while being covered with the liner 72. It is provided. One end side portion 76 of the lifter 74 is bonded to the shell inner surface 70a, and a ridge support rib 78 is formed in the vicinity of the end side portion 76 in parallel with the mounting edge 76a. The ridge support ribs 78 lift the lifter 74 from the inner surface 70a of the shell and enhance the cleaning property of the liner 72.

Further, since the mounting edge 76a of the lifter 74 and the rib supporting rib 78 are arranged parallel to each other (the distance between them is the same regardless of whether they are inside or outside the magnetic disk). The lifting action of the lifter 74 with respect to the liner 72, that is, the action of imparting the cleaning property is uniform regardless of the vicinity of the inner circumference side and the outer circumference side of the magnetic disk.

[0005]

[Problems to be solved by the device]

 However, since the magnetic disk has a higher density medium surface on the inner circumference side than on the outer circumference side, and there is a high probability that an error will occur on the inner circumference side. If the cleaning property is the same, there is a problem that cleaning near the inner circumference side of the magnetic disk becomes substantially insufficient.

In addition, in order to solve such a problem of the liner, the distance between the mounting edge 76 of the lifter 74 and the rib support rib 78 is shortened so that the lifting action of the lifter 74 with respect to the liner 72 is generally improved. In this case, the lifter 74 strongly presses not only near the inner circumference side but also near the outer circumference side of the magnetic disk through the liner. Strong pressure contact near the outer circumference may give excessive torque to the rotating magnetic disk.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a disk cartridge in which the cleaning performance for the medium surface near the inner peripheral side of the magnetic disk is improved without applying excessive torque to the magnetic disk during rotation.

[0008]

[Means for Solving the Problems]

 According to the present invention, liners for cleaning the magnetic disk are provided on the inner surfaces of the upper shell and the lower shell of a cartridge body that rotatably accommodates the magnetic disk, and one end is attached to the inner surface of the upper shell or the lower shell. In the disk cartridge provided with an elastic sheet-shaped lifter that lifts the liner through a protruding rib that is provided in the vicinity of the one end portion, a mounting edge of the one end portion of the lifter and the protrusion are provided. Achieved by providing a disk cartridge characterized in that the lifter or the supporting rib is arranged so that the distance from the line supporting rib is shorter in the inner peripheral side than in the outer peripheral side of the magnetic disk. It was done.

[0009]

[Action]

 According to the disk cartridge of the present invention, the distance between the mounting edge at one end of the lifter and the rib supporting rib is made shorter near the inner circumference than near the outer circumference of the magnetic disk. Since the lifter or the supporting rib is arranged, the lifting action of the lifter with respect to the liner, that is, the action of imparting the cleaning property is gradually increased from the outer peripheral side to the inner peripheral side of the magnetic disk, and the cleaning of the inner peripheral side is sufficiently performed. You can

On the other hand, since the lifter normally presses the vicinity of the outer peripheral side of the magnetic disk via the liner, there is no fear of giving excessive torque to the rotating magnetic disk. Further, when the inner peripheral side of the magnetic disk is pressed, the influence on the rotational torque of the magnetic disk is much smaller than when the outer peripheral side is pressed. Therefore, the rotational torque of the magnetic disk is not so large even if the pressure contact on the inner peripheral side becomes slightly stronger.

[0011]

【Example】

 Hereinafter, embodiments of a disk cartridge according to the present invention will be described with reference to the drawings. 1 and 2 show an embodiment of a disk cartridge according to the present invention. FIG. 1 is an inner view of the lower half of the disk cartridge according to the embodiment, and FIG. It is a sectional view taken along the line I.

In the disk cartridge according to the present embodiment, as shown in FIG. 1, a liner 4 for cleaning the magnetic disk is provided on each of the inner surfaces 2a of the lower shells 2 of the cartridge main body that rotatably accommodates the magnetic disk. Further, an elastic sheet-like lifter having one end side portion 8 attached to the inner surface 2a of the lower shell 2 and allowing the liner 4 to be lifted up via a ridge support rib 10 protruding in the vicinity of the one end side portion 8. The structure provided with 6 is the same as a known disk cartridge.

Therefore, as shown in FIGS. 1 and 2, the disc cartridge according to the present embodiment has a distance between the mounting edge 8 a of the one end side 8 of the lifter 6 and the ridge support rib 10. The lifter 6 is arranged such that the vicinity of the inner circumference side is shorter than the vicinity of the outer circumference side of the magnetic disk. This embodiment will be described further. As shown in FIGS. 1 and 2, the lifter 6 is arranged so as to be inclined so that the mounting edge 8a of the end portion 8 is not parallel to the rib support rib 10. That is, by tilting the lifter 6 in this manner, the mounting edge 8a of the one end side 8 and the protruding strip supporting rib 10 are not parallel to each other, and the mounting edge 8a and the protruding strip supporting rib near the inner peripheral side of the magnetic disk are not supported. The distance t between the rib 10 and the rib 10 is shorter than the distance T between the mounting edge 8a and the rib supporting rib 10 near the outer peripheral side thereof.

In the disk cartridge of the present embodiment configured as described above, the lifting action of the lifter 6 with respect to the liner 4 is caused by the mounting edge 8 a and the protrusion supporting rib 10 from the outer peripheral side to the inner peripheral side of the magnetic disk. It is increased by gradually reducing the distance between them. Since the lifting action imparts a cleaning property to the liner 4, cleaning is performed more thoroughly near the inner circumference side of the magnetic disk than near the outer circumference side. For this reason, the vicinity of the inner peripheral side where the error occurrence rate is high is sufficiently cleaned, and the error is suppressed as much as possible. On the other hand, since the lifter 6 does not strongly press the outer peripheral side of the magnetic disk through the liner 4, there is no fear of giving an excessive torque to the rotating magnetic disk.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 3 is an inside view of a lower half of a disk cartridge according to another embodiment. The disk cartridge according to the present embodiment is constructed almost in the same manner as the embodiment shown in FIG. 1, and the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals in FIG. Although not described, the difference from the embodiment of FIG. 1 is that the distance between the mounting edge 8a of the one end side 8 of the lifter 6 and the rib supporting rib 11 is set to the outer peripheral side of the magnetic disk. The support ribs 11 are arranged so that the inner circumference side is shorter than the vicinity.

To explain this embodiment in more detail, the rib supporting ribs 11 are formed on the inner surface 2a of the lower half by tilting in the direction of arrow B from a position parallel to the mounting edge 8a of the one end 8 of the lifter 6. Therefore, the distance between the mounting edge 8a near the inner peripheral side of the magnetic disk and the rib supporting rib 11 is the distance between the mounting edge 8a near the outer peripheral side and the rib supporting rib 11. It is shorter than the distance.

Therefore, also in the case of this embodiment, the same effect as in the case of the disk cartridge of the previous embodiment can be obtained. Further, another embodiment of the present invention will be described with reference to FIG. FIG. 4 is an inside view of the lower half of the disk cartridge according to another embodiment. The disc cartridge according to the present embodiment is constructed almost in the same manner as the embodiment shown in FIG. 1, and the same members as those in the embodiment shown in FIG. 1 are designated by the same reference numerals in FIG. Although detailed description thereof will be omitted, unlike the embodiment of FIG. 1, in contrast to the embodiment of FIG. 1, one end portion of the lifter 6 uses a pair of boss stoppers 12 and 12 instead of the lower boss inner surface 2 instead of using an adhesive. Is the point attached to. Although the provisional mounting edge 8a at one end is actually unclear (it is clearly shown in FIG. 4), when considering the influence of the pressing action of the boss stoppers 12, 12. , The pair of boss stoppers 12 and 12 are substantially parallel to the line connecting the boss stoppers 12 (broken line S in FIG. 4). It is not parallel. That is, the distance between the substantial mounting edge 8a and the rib support rib 10 near the inner circumference of the magnetic disk is the distance between the mounting edge 8a and the rib support rib 10 near the outer circumference. It's getting shorter.

Therefore, also in the case of this embodiment, the same effect as in the case of the disk cartridge of the previous embodiment can be obtained. Although the lifter is provided on the inner surface of the lower half in each of the above embodiments, it may be provided on the upper half instead of the lower half.

[0019]

[Effect of the device]

 The disk cartridge according to the present invention can improve the cleaning property of the media surface near the inner circumference side of the magnetic disk without applying excessive torque to the magnetic disk during rotation.

[Brief description of drawings]

FIG. 1 is an internal view of a lower half of a disc cartridge according to this embodiment.

FIG. 2 is a cross-sectional view taken along the line II of FIG.

FIG. 3 is an internal view of a lower half of a disc cartridge according to another embodiment different from the embodiment of FIG.

FIG. 4 is an internal view of a lower half of a disk cartridge according to another embodiment different from the embodiments of FIGS. 1 and 2.

FIG. 5 is an internal view of a lower half of a conventional disc cartridge.

[Explanation of symbols]

 2 Lower half 2a Lower half inner surface 4 Liner 6 Lifter 8 One end side 8a Attachment edge 10, 11 Projection support rib 12 Boss stop

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 housed, and one end is attached to the inner surface of the upper shell or the lower shell. A disk cartridge provided with an elastic sheet-shaped lifter for lifting the liner through a protruding rib supporting rib that is provided in the vicinity of the one end side, and the mounting edge of the one end side of the lifter and the ridge A disk cartridge, wherein the lifter or the supporting rib is arranged such that a distance between the supporting rib and the supporting rib is shorter on the inner peripheral side than on the outer peripheral side of the magnetic disk.