JPH03165382A - Disk cartridge - Google Patents

Abstract

PURPOSE:To widely improve durability or reliability by inclining a rib on the outside to a disk rotating direction and arranging it at a position, where a liner is abutted, without interval to the radial direction of a disk. CONSTITUTION:A rib 10 is projected on the inside of a case while being faced at the free end of the tip of a lifter 3 and a liner 4 is exactly abutted. In such a case, the rib 10 is arranged while arranging a linear projected line or a curved projected line inclined to the outside across the rotating direction of a disk 1 at intervals, and the rib is arranged at the position where the liner 4 is abutted from the inside to the outside without interval in the radial direction of the disk 1. Namely, the ribs 10 are arranged at the positions where the front and rear ends of the adjacent ribs 10 are mutually positioned on a disk track line or lapped, and the ribs 10 are arranged while being inclined in a direction that dust is pushed out by disk rotation. Thus, all the tracks of the rotating disk are pressed by the ribs 10 and uniform cleaning can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a magnetic disk, a floppy disk, a hard disk, and a cleaning disk.

The present invention relates to a disk cartridge in which a disk-shaped medium such as an optical disk or a magneto-optical disk is rotatably housed in a case.

[Conventional technology]

Floppy disks, compact disks, and video disks, which are generally used in digital data storage devices and video equipment, are rotatably stored in a case to prevent dirt, dust, and scratches during handling. A lifter that is an elastic member that can be biased in one direction is provided on the inner surface of the case, and a plurality of ribs that serve as receiving protrusions for the lifter are provided at intervals on the inner surface of the case to bring the sheet-like liner into contact with the surface of the disk. It is configured to clean the track position of the disc.

[Problem that the invention seeks to solve]

However, in this conventional disk cartridge, as shown in FIG. 3A-B, the liner is pressed against the free end of lifter b in case a to bring the liner into contact with the surface of the disk. The disc is clamped from both sides, and the inner surface of one case is provided with a rib C on the receiving protrusion of the lifter opposite to the lifter b, but this conventional rib C is tangential to the rotational direction of the disc. In the direction? ! Because the linear protrusions are arranged at several intervals, there are gaps between the ribs, and between the ribs, the liner serving as the cleaning member is not pressed against the disk as shown in Figure 3C. The portion d occurs in an annular stripe shape, causing variations in the cleaning effect at track positions on the disk, damaging the disk surface, and causing problems in durability and reliability.

The present invention aims to accurately eliminate these conventional drawbacks by bringing a cleaning member into contact with the entire trunk portion of a rotating disk while maintaining a constant pressing force for a long period of time, thereby properly preventing damage to the disk surface. The purpose of the present invention is to provide a disk cartridge at a low cost that can significantly improve durability and reliability by preventing such problems.

[Failure to solve the problem]

In the present invention, a lifter 3 made of an elastic member having at least elasticity is provided on the inner surface of a case 2 that rotatably stores a disk 1, and the lifter 3 is used to form a sheet-like liner 4.
A disk cartridge in which a plurality of ribs 10 for receiving disks, which are pressed by a lifter, protrude at intervals from the inner surface of the case facing the lifter 3, which are configured to contact the surface of the disk 1, the ribs 10 are inclined outward with respect to the disk rotation direction;
This disc cartridge is characterized in that it is disposed at a position where the liner 4 abuts without any gap in the radial direction of the disc.

[For production]

In the disk cartridge of the present invention, a disk 1 in a case 2 is interposed between a pair of liners 4, 4, and is pressed against a rib 1O while being held by a lifter 3, and at the contact portion, the disk 1 is moved in the radial direction. The ribs 10, which are positioned so that they contact the liner 4 without any gaps, press all the tracks on the disk to achieve a cleaning effect, and the ribs that are slanted outward discharge dust outwards with centrifugal force and onto the recording surface of the disk 1. It can be used safely without causing damage, and the reliability and precision of the disc 1 can be sufficiently increased.

〔Example〕

An embodiment in which the present invention is applied to a floppy disk cartridge will be described. A circular disk 1 serving as a recording medium, a case 2 consisting of an upper case and a lower case for rotatably housing the disk 1, and this case In order to open and close the opening 6 for inserting the card into the recording/playback device formed in 2, there is a metal (StlS) or plastic material whose cross section is approximately U-shaped, which opens and closes this opening 6 while holding the upper and lower surfaces of the case. The upper case and the lower case each have a lifter 3 which imparts at least elasticity to the inner surface and can bias in one direction, and the lifter 3 moves the sheet-like liner 4 onto the surface of the disk 1. It is configured to make contact with the top.

The lifter 3 is a plate-shaped tongue piece made of metal or synthetic resin such as PET, and is a bent lifter that is fixed to the inner surface of the case with one free end. A liner 4 is provided with a rib 10 opposite to the free end of the tip and protruding inside the case.
This allows for accurate pressure welding.

In this case, the ribs 10 are arranged with linear or curved protrusions at intervals that intersect with the rotational direction of the disk 1 and are inclined outward, and with respect to the radial direction of the disk 1.
That is, they are arranged at positions where the liner 4 contacts without any gaps from the inside to the outside in the radial direction. That is, the front and rear ends of adjacent ribs 10 are located on the disc track line, or are arranged in a ramp position and are inclined in a direction in which dust is removed to the outside as the disc rotates.

In the figure, reference numeral 5 denotes a slide area for the shutter, which is provided as a concave surface on the case surface. 7 is a shutter, 7 is a window hole, and 8 is a center core.

Furthermore, even if there is a gap between the ribs 1 (1, 10), the straight or curved ribs 10 are arranged so that there is no part between the ribs where the liner 4 of the cleaning member is not pressed against the rotating disk 1. In addition, consideration has been given to making the frictional resistance as low as possible so that it can be used without damaging the disk surface.

〔Effect of the invention〕

The present invention provides a lifter that is provided with at least elasticity on the inner surface of a case that rotatably stores a disk, and a sheet-like liner is configured to come into contact with the surface of the disk with the lifter, and the sheet-like liner is configured to be in contact with the surface of the disk, and to In a disc cartridge in which a plurality of ribs for receiving discs which are pressed by a refuku are protruded from the inner surface of the case with gaps between each other, the ribs are tilted outward with respect to the direction of rotation of the disc (and tilted in the radial direction of the disc). By being placed in a position where the liner touches the liner without any gap,
The ribs press against all tracks of the rotating disk, allowing uniform leaning, and the centrifugal force allows dirt to be easily discharged to the outside of the disk, resulting in consistent cleaning effects and reduced errors. It is possible to improve the yield, and it can be used in a stable state without deteriorating the cleaning effect or head shank. It also greatly improves durability and reliability without damaging the disk surface, and improves processing accuracy. It is safe to use and practically useful without raising any particular problems, and moreover, it can be used without the risk of causing problems that would have an adverse effect on the disk-shaped medium.

[Brief explanation of the drawing]

Figures 1A-B are plan views showing the interior of the embodiment of the present invention in a separated state, Figure 2 is a perspective view of the separated state, and Figures 3A-,B
3 is a plan view showing the interior of the conventional example in a separated state, and FIG. 3C is an enlarged vertical cross-sectional view illustrating the rib portion of FIG. 3B. 1... Disc, 2... Case, 3... Lifter, 4... Liner, 5... Slide area, 6...
・Opening, 7...Shutter, 8...Center core, 1
0...rib.

Claims (1)

[Claims] (1) A case (2) that rotatably stores the disc (1).
) with at least elasticity imparted to the inner surface of the lifter (3)
A sheet-like liner (4) is provided with the lifter (3).
is configured to be in contact with the surface of the disk (1),
In a disc cartridge in which a plurality of ribs (10) for receiving a disc pressed by a lifter protrude from the inner surface of the case facing the lifter (3) with a gap between them, the ribs (10) are arranged such that the ribs (10) What is claimed is: 1. A disk cartridge characterized in that the disk cartridge is inclined outwardly and is disposed at a position where it abuts a liner (4) without any gap in the disk radial direction.