JP2768002B2 - Shutter for magneto-optical disk cassette - Google Patents

Description

The present invention relates to a shutter for opening and closing a head insertion opening of a magneto-optical disk cassette.

[Prior art] With the rapid development of OA, magnetic disks are becoming more widespread, but recently, magneto-optical disks with larger capacity than magnetic disks and rewritable in the same way as magnetic disks have been developed. It is getting.

A magneto-optical disk cartridge, which is a recording medium for a magneto-optical disk, has a disk-shaped magneto-optical disk body, a pair of upper and lower halves for housing the disk, and slidably attached to the outer peripheral portions of these halves to have a head insertion opening. The shutter mainly opens and closes.

Conventionally, as shown in FIGS. 5 and 6, a shutter 1 is provided with a resin slider 2 slidably provided between upper and lower halves along one edge of the half. 2 and a metal shutter main body 3 made of SUS or the like having a substantially U-shaped cross section for opening and closing the head insertion opening.

[Problem to be Solved by the Invention] However, in the shutter 1, since the shutter main body 3 is made of metal harder than the resin half, the upper and lower half resins are slightly cut by the shutter main body 3 when the shutter is opened and closed. However, there has been a problem that the shavings may adhere to the magneto-optical disk body and hinder writing and reading of information.

An object of the present invention is to solve the above problem.

Means for Solving the Problems In order to achieve the above object, a shutter for a magneto-optical disk cassette according to the present invention is characterized in that a shutter is provided between upper and lower halves facing each other along one edge of the half. And a shutter body fixed to the slider to open and close the head insertion opening. The surface of the shutter body is covered with a resin film, and the resin film is made of fluororesin or the like. Characterized by being formed of a resin having a low coefficient of friction and non-water absorption. A second aspect of the present invention is characterized in that the thickness of the resin film is set to 2 to 3 μm.

According to the first aspect of the present invention, since the shutter body is covered with a resin film having a low coefficient of friction and a non-water-absorbing property, a strong force is applied when the shutter is opened and closed. And the shutter opens and closes smoothly, so that the upper and lower halves are not shaved by the shutter, and the shutter does not deform due to changes in humidity or the like. Also, the opening / closing of the shutter is smoothly and reliably performed without deteriorating the engagement relationship between the shutter and the half. According to a second aspect of the present invention, the resin film has a thickness of 2 to 3 μm.
By setting it to m, the dimensions of the shutter fit within the intersection without changing the dimensions of the shutter body, and the abrasion resistance and adhesion are sufficiently exhibited at low cost.

Embodiment An embodiment of the magneto-optical disk cassette shutter according to the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the shutter 10 has a slider 11 made of resin having substantially the same shape as the conventional slider 2 and a shutter body 12 having a substantially U-shaped cross section attached to the slider 11. And the subject.

The slider 11 is a long thin plate-shaped slider body 13.
And a slide portion formed at both ends of the slider body 13 and slidably engaged with grooves and the like formed in upper and lower halves.
The shutter main body 12 is fixed to the left side portion 13a of the slider main body 13 so as to sandwich the same.

The shutter main body 12 is made of SUS, and its surface is entirely covered with a resin film 15. The thickness of the resin film 15 is set to 2-3 μm. this is,
This is because the resin has a minimum thickness that allows the shutter to be within the dimension crossing when coated with resin, and is inexpensive and has abrasion resistance and adhesion characteristics.

Further, the resin film 15 is formed of a resin having a low coefficient of friction and a non-water-absorbing property, such as a fluororesin, so that the opening and closing operation of the shutter is smooth, and the generation of shavings is prevented. The deformation of the shutter is also prevented.

The shutter 10 having the above-described structure is similar to that of FIGS.
As shown in the figure, a pair of upper and lower halves accommodating a magneto-optical disk body 16 are used by being slidably attached to the outer peripheral portions thereof.
When the shutter is opened and closed, as in a conventional shutter body without a resin film 15,
The resin of No. 7 and No. 18 is not scraped off, so that the adverse effects caused by the adhesion of the shavings to the magneto-optical disk body 16 are eliminated, the reliability is improved, and the slidability of the shutter 10 is improved.

In the above embodiment, the resin film 15 is formed over the entire surface of the shutter main body 12, but may be formed only on the sliding surface between the upper and lower halves 17, 18 of the shutter main body 12.

[Effects of the Invention] As described above, according to the first aspect of the shutter for a magneto-optical disk cassette of the present invention, the shutter body is covered with a resin film having a low coefficient of friction and non-water absorption. When opening and closing, there is no need to apply strong force to the shutter, and the shutter can be opened and closed smoothly,
The upper and lower halves are not shaved by the shutter, and the shutter is not deformed by changes in humidity or the like. Therefore, the engagement relationship between the shutter and the half may be deteriorated even after long-term use. Therefore, the shutter can be opened and closed smoothly and reliably. Therefore, the adverse effects caused by the adhesion of the shavings to the magneto-optical disk body are eliminated, reliability is improved, and slidability of the shutter is improved. According to the second aspect of the present invention, the resin film is
By setting the thickness to μ3 μm, it is possible to easily fit the dimensions of the shutter within the intersection without changing the dimensions of the shutter body, and at the same time, it is inexpensive and has sufficient abrasion resistance and adhesion. it can.

[Brief description of the drawings]

1 to 4 show an embodiment of a shutter for a magneto-optical disk cassette according to the present invention. FIG. 1 is a front view of the shutter, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a plan view of the upper half, FIG. 4 is a plan view of the lower half, FIGS. 5 and 6 show an example of a conventional shutter, FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 10 Shutter, 11 Slider, 12 Shutter body, 15 Resin film, 17 Upper half, 18 Lower half

Claims (2)

(57) [Claims] 1. A shutter for a magneto-optical disc cassette for opening and closing a head insertion opening of a magneto-optical disc cassette,
A slider provided slidably along one edge of the half between upper and lower halves opposed to each other, and a shutter body fixed to the slider and opening and closing the head insertion opening; A shutter for a magneto-optical disk cassette, wherein a surface of a shutter body is covered with a resin film, and the resin film is formed of a resin having a low friction coefficient and a non-water-absorbing property, such as a fluororesin. 2. A shutter for a magneto-optical disk cassette according to claim 1, wherein the thickness of the resin film is 2 to 3 μm.