JPS63311681A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent a disk from flawing by alleviating a shock against the disk by a buffer material provided in a cartridge main body. CONSTITUTION:The titled cartridge is constitutive of an upper side cartridge main body 1 and a lower side cartridge main body 4, and then the disk 2 is housed in between these upper and lower cartridge main bodies 1 and 4, whereas a guide 1A formed larger than the outer circumference of this disk 2 is provided to the lower side cartridge main body 4 on the side of the disk 2, while the buffer material 3 is provided to the upper and lower cartridge main bodies 1 and 4 on their inner surfaces in the vicinity of the inner circumferential side of this guide 1A. When this buffer material 3 is provided on the inner surfaces of the upper and lower cartridge main bodies 1 and 4, the buffer material 3 is formed with a gap in some measure from the disk 2. Consequently, in case of a fall or a shock received externally, the surface of the disk 2 will never come in contact with the inner surfaces of the upper and lower cartridge main bodies 1 and 4 because of the buffer material 3, and the shock given to the disk 2 against the upper and lower cartridge main bodies 1 and 4 will be buffered. By this method, the disk 2 is protected effectively.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is useful for protecting a disk-shaped recording medium (hereinafter referred to as "disc") housed in a cartridge body from external impact. related to disc cartridges.

(Prior Art) With the development of optoelectronics today, information recording and reproducing devices that can randomly record, reproduce, or erase audio or image information with high performance using a light beam such as a laser beam have been commercialized. ing. The recording medium used in this device is generally a disk-shaped disk made of transparent acrylic resin, transparent polycarbonate resin, glass, etc., on which a photosensitive recording thin film is formed, and on the recording surface there are projections for recording information. (pits) are arranged in a spiral manner in the circumferential direction at a high density to form a track, thereby recording, reproducing, or erasing information on the order of the wavelength of light.

The above disc is designed to prevent deterioration due to changes over time.
A protective surface made of plastic (for example, the above-mentioned acrylic or polycarbonate) or glass is formed on the surface so that it can withstand some degree of impact.

(Problems to be Solved by the Invention) By the way, as a desired disk is used for many years, dust and dirt may accumulate from the outside, fingerprints may be attached due to contact with fingers during installation and removal, or the disk may be left bare. Surface scratches due to external factors caused by the disc being dropped, or deformation and damage of the disc due to accidental dropping, resulting in light beams such as laser light not being properly transmitted through the disc surface.
There were cases where accurate information was not detected. For this reason, the disk is housed in a cartridge to protect it from damage caused by the above-mentioned external factors, and the disk is loaded into the device as is for use.

Such a conventional disk cartridge is shown in FIG.

This disk cartridge includes an upper cartridge body, a lower cartridge body 104 having a guide 101A for guiding the disk 102, and a disk 102 housed between the upper and lower cartridge bodies 101 and 104.
It consists of

When such a disk cartridge is subjected to an external shock, the disk 102 is damaged by the cartridge body 101, 1.
If the disc 102 collides with or comes into contact with the inner surface of the guide 101A in the disc 04 or its main body, the disc 102 may be deformed or the recording surface may be damaged, resulting in a problem that recording, playback, or erasing cannot be performed. Ta.

The present invention has been made to solve these problems, and an object of the present invention is to provide a disk cartridge in which a housed disk can be effectively protected from external shocks.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the disk cartridge of the present invention includes a disk cartridge in which a disk-shaped recording medium is housed in a cartridge body.
The present invention is characterized in that a cushioning material is provided within the cartridge main body with a certain gap relative to the recording medium.

(for production) Hereinafter, the effects of the present invention will be explained.

When the disk cartridge configured as described above receives an external impact, the recording medium first comes into contact with the cushioning material within the cartridge body, so that the impact on the recording medium is alleviated.

Also, when this disk cartridge is installed in a recording/reproducing device, the recording medium is normally rotated while being held in an intermediate state within the cartridge body, so as mentioned above, the ring 43i material has a certain degree of contact with the recording medium. In the disc cartridge of the present invention provided with a gap, the buffer material does not come into contact with the recording medium during rotation, and the rotational state of the recording medium is maintained in a good condition.

Further, in the above configuration, since 1Jif is relaxed without providing a buffer material to the recording medium, there is no influence on the rotation of the recording medium.

(Example) Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a disk cartridge according to the present invention, and FIG. 2 is a sectional view taken along line AA' in FIG.

The disk cartridge shown in the figure consists of an upper cartridge body 1, a lower cartridge body 4, and a disk 2 stored between these upper and lower cartridge bodies 1 and 4. is a guide IA formed slightly larger than the outer circumference of this disk 2.
A cushioning material 3 is provided on the inner surface of the upper and lower cartridge bodies 1.4 near the inner peripheral side of the guide IA.

When the cushioning material 3 is provided on the inner surface of the upper and lower disk bodies 1.4 as described above, it is necessary to form the cushioning material 3 so that it has a certain gap with the disk 3, as shown in FIG. be.

This gap may be such that the disk 3 does not come into contact with the cushioning material 3 when the disk cartridge of this embodiment is loaded into a recording/reproducing apparatus and the disk 3 is rotated. With such a configuration, the disk 3 can be rotated in a stable manner.

Here, the cushioning material 3 can be formed by a two-color forming method, or by spraying by adhesion or the like.

Further, as the material of the cushioning material 3, rubber, urethane foam, etc. are suitable.

In a disk cartridge having such a structure, when the disk cartridge is dropped or receives an external impact, the cushioning material 3 prevents the surface of the disk 2 from coming into contact with the inner surfaces of the upper and lower cartridge bodies 1.4, and the surface of the disk 2 Impacts to the upper and lower cartridge bodies 1 and 4 are buffered by this cushioning material 3.

Further, according to the above configuration, the cartridge main body 1
．． Since the disk 2 is protected from impact by the improvement of only 4, there is no need for any improvement in the disk 2, and the rotational characteristics etc. do not change.

(Effects of the Invention) As explained above, in the disc cartridge of the present invention, the cushioning material provided inside the main body of the cartridge effectively alleviates the impact on the disc when it is dropped or is subjected to an external impact. Protect this disk from being damaged. Therefore, the recording surface of the disc housed in the disc cartridge will not be damaged, unlike in the conventional case.

Further, in the disc cartridge of the present invention, since no improvements are made to the disc, a disc cartridge that is resistant to external shocks can be obtained without any change in the rotational characteristics of the disc.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the disk cartridge of the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG.
The figure is an exploded perspective view of a conventional disk cartridge. 1... Upper cartridge body 2... Disk 3... Cushioning material 4... Lower cartridge body Figure 2

Claims (2)

[Claims] (1) A disk cartridge comprising a disk-shaped recording medium housed in a cartridge body, characterized in that a cushioning material is provided within the cartridge body with a certain amount of space between the disk-shaped recording medium and the recording medium. . (2) The disk cartridge according to claim 1, wherein the cushioning material is provided near the inner and outer peripheries of the recording medium within the cartridge main body.