JPH02201787A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent malfunction of a shutter due to dewing, etc., by providing projecting parts on inner surfaces of flat plate parts of the shutter made of a synthetic resin and forming an appropriate gap between the flat plate parts and a cartridge case. CONSTITUTION:The shutter 7 molded of a synthetic resin is provided with two flat plate parts 9 and 9 opposite to each other to be in elastic contact with surfaces of recessed parts of the cartridge case respectively and an end plate part 10 for connecting one side of both flat plate parts 9 and 9 respectively, and its cross-sectional form is in an approximate U-shape. Then, inner surfaces of the flat plate parts 9 and 9 facing to the cartridge case are provided with the projecting parts 13 to form the gap between the flat plate parts 9 and 9 and the cartridge case. By this method, the shutter 7 can smoothly be operated even leaving it as it is under dewable condition, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] - The present invention relates to a disk drive such as a magnetic disk cartridge or an optical disk cartridge, in which a disk for recording information is rotatably housed in a cartridge case.
The present invention relates to a disk cartridge 1-ridge, and particularly to a disk cartridge 1-ridge equipped with a synthetic resin shutter for opening and closing an opening for inserting a head.

[Conventional technology]

The second type of disk cartridge is, for example, No. 131! l
The type shown in is known.

The figure shows a magnetic disk cartridge.

A flexible magnetic disk 2 is rotatably housed in a cartridge case 1 constructed by joining an upper case la and a lower case 1b made of synthetic resin. The magnetic disk 2 has a hub 3 in the center, and this hub 3 is exposed from a hole 4 provided in the center of the Carmill Ridge case 1.The magnetic disk 2 is driven through the hub 3 by a drive device at a predetermined speed. Rotationally driven.

A rectangular opening 5 into which a magnetic head is inserted is formed at a predetermined position on the upper and lower surfaces of the cartridge case 1. The periphery of this opening 5 is a rectangular, slightly rectangular four part 6, and a shutter 7 having a U-shaped cross section is slidably mounted within this four part 6.

The shutter 7 has approximately the same size as the opening 5.

It has a rectangular window 8 and is always elastically biased in the direction of closing the opening 5 by a built-in spring member (not shown). Then, the shutter 7 is moved against the elastic force of the spring member, and the opening 5 is opened with the opening 1'' portion 5 and the window 7 aligned, and the magnetic head can be inserted.

By the way, the shutter 7 is made of metal or synthetic resin. When the shutter 7 is made of metal, when the shutter 7 slides, the sliding surfaces of the four parts 6 are scraped by the edges of the shirt tough, so that shavings of synthetic resin are generated and adhere to the magnetic disk 2.

This tends to cause errors during recording and reproduction.

To prevent this, if a large clearance is provided between the cartridge case 1 and the shutter 7, it will be easier for dust to enter from around the shutter 7, and the dust will enter the magnetic disk 2.
If it adheres to the surface, it can cause errors during recording and playback.

On the other hand, when the shutter 7 is made of synthetic resin, the problem of scraping of the four parts 6 does not occur unlike that of a metal one. Although it is possible to effectively prevent dirt from entering from around the shirt tough, it is not without problems. Otherwise, if the shutter 6 is left in the open position under conditions where condensation is likely to occur, the inner surface of the shutter 6 in the open position may adhere to the four parts 6 of the cartridge case 1 due to moisture, causing the opening operation of the shutter 6 to be delayed. The present invention has been made in view of the above points.

To provide a disk cartridge 1-ridge which enables smooth operation of a shutter even when left under conditions where it is easy to close.

[Means for Solving the Problems J] In order to achieve the above object, the present invention includes a cartridge case that rotatably houses a cartridge, and a cartridge case that is slidably attached to the cartridge case.

The object of the present invention is a D&R cartridge that is equipped with a synthetic resin shutter that opens and closes an opening for inserting a head provided in the cartridge case.

The shutter includes two planar plate portions facing each other and elastically contacting the surface of the edge case of the car 1, respectively;
It has an end plate part that connects one end edge of the both-hand face plate part, and has a substantially U-shaped cross section, and a convex part is provided on the inner surface facing the car mill ridge case of the flat plate part, This device is characterized in that a gap is formed between the face plate portion and the cartridge case.

[Effect]

With this configuration, even if there is condensation on the inner surface of the shirt sleeve or the surface of the car ridge case, a slight gap will be formed between the car ridge and the car ridge by providing the convex portion. Therefore, the shutter can be moved to the first frame.

(Example) Next, an example of the present invention will be described. Since the D, F sunker 1 to the ridge main body (car 1 to ridge case L and the magnetic disk 2 housed therein, etc.) are the same as the conventional ones, Their explanation will be omitted.

1 and 2 are a plan view and a sectional view of a shirt tough according to a first embodiment of the present invention.

For example, the shutter 7, which is molded from a synthetic resin such as polypropylene, is made of two planar plates that face each other and come into elastic contact with the surfaces of the four parts 6 of the ridge case 1. 9, and an end plate portion 10 that connects one edge of the inner plane plate portion 9.9.
Therefore, the cross-sectional shape is approximately U-shaped, but the flat plate portion 9
, 9 on the free end side (on the right side as viewed from the paper) is slightly narrower than the thickness of the cartridge case l (see FIG. 13).

As shown in FIG. 1, when the shutter 7 is closed, the flat plate portion 9 is inserted into the head insertion opening 5 of the car 1 edge case 1.
a rectangular closure part 11 having a relatively large area covering the
Adjacent to the closing part 11 is a window 8 of approximately the same size and shape as the opening 5 of the ridge case l;
It is composed of a frame part 12 which surrounds and is connected to the closing part 11 and has a U-shaped planar shape.

In this example, a plurality of rib-like protrusions 13 (in the embodiment, two pieces of wood 1) are continuously or intermittently protruded along the sliding direction X of the shutter 7 from the closing part 11 to the frame part 12. The appropriate height of this convex portion 13 is about 10 to 50 μm (the same applies to other embodiments), and in this embodiment, as shown in FIG. The cross-sectional shape of the eight convex portions 13, which are formed so as to face each other, is preferably rounded, such as a hemispherical shape, as shown in FIG.

In this embodiment, the convex portion 13 is provided on both the closing portion 11 and the frame portion 12, but the convex portion 13 may be provided only on the closing portion 11. Further, although a plurality of protrusions 13 are provided in this embodiment, it is also possible to provide only one protrusion.

3 and 4 are a plan view and a sectional view of a shirt tough according to a second embodiment of the present invention.

As shown in these figures, the rib-shaped convex portion 13
Several pieces of Vi are formed on both of the frame parts 12 of 1 so as to extend in a direction perpendicular to the sliding direction X.

As shown in FIG. 4, the cross-sectional shape of the rib-like convex portion 7b becomes gradually thicker toward the free end side (toward the right side as viewed from the paper) of the closed portion 11 (frame portion 12) in its longitudinal direction. It is formed into a tapered shape.

The length of the second rib-like convex portion 13 may be shorter than the length of the window 8 as shown in the figure. It can also be made approximately equal to the full width of the shirt tough. Further, the convex portion 13 may be provided only at approximately the center of the closing portion 13.

5 and 6 are a plan view and a sectional view of a shirt tough according to a third embodiment of the present invention.

In this embodiment, the rib-like convex portion 13 is formed continuously along the outer edge of the closing portion 11 and the frame portion 12, except for the portion where the rib-like convex portion 13 is connected to the end plate portion 10.

In this configuration, since the gap between the shutter 7 and the car 1 to the rigid case L is closed by the outer edge thereof, it is possible to effectively prevent dust from entering from this area.

7 and 8 are a plan view and a sectional view of a shirt tough according to a fourth embodiment of the present invention.

In this embodiment, a plurality of embossed protrusions 13 each having a substantially hemispherical cross-sectional shape are provided approximately at the center of the closing portion 11 at appropriate intervals. Of course, a large number of the convex portions 13 may be formed over the entire surface of the closing portion 11 and the frame portion 12.

FIG. 9 is a partially sectional plan view of a shirt tough according to a fifth embodiment of the present invention. In the case of this embodiment, as shown in the figure, a convex portion 13 is formed by texturing on the entire inner surface or necessary area of the closing portion 11 and the frame portion 12.

10 and 11 are a plan view and a sectional view C of a shirt tough according to a sixth embodiment of the present invention. In the case of this embodiment, the shutter 7 is also formed by the injection molding method as in the prior art, and then the approximately central portion of the closing portion 11 is partially depressed inward from the outer surface so as to protrude inwardly.
One or more protrusions 13 are formed.

In the second embodiment, the convex portion 13 is round in plan view, but for example, the letter “A” may be written on the outer surface of one of the closed portions 11, and the letter r13J may be written on the outer surface of the other closed portion 11. It is also possible to engrave the sight indication of the disk car 1-ridge on the shutter 7 and make the inwardly protruding portion 13 by the engraving.

Next, using FIG. 12, we will explain the parts of the flat plate part 9 where the function of the convex part 13 can be effectively demonstrated. As a result of investigating the areas that are in close contact with the surface of the fourth part 6), the two-dot chain line A among the closed parts 11 whose area is wider than the frame part 12.

The region surrounded by B, C, and D (the hatched region), that is, the almost medium-heated part of the closed part 11, is the best place for car 1.
- It is in close contact with the ridge case 1 (fourth part 6). Therefore, by providing the convex portion 13 at least in this area, it is possible to effectively prevent the shirt tough new song from sticking.

Further, since the shutter 7 does not float around the window 8 or the outer periphery, dust resistance is also improved.

Although the above embodiment has been described with respect to a magnetic disk car 1-helix, the present invention can also be applied to other systems such as an optical disk car mill ridge or a magnetic-optical disk car 1-tree.

〔Effect of the invention〕

As explained above, the present invention provides a convex portion on the inner surface of the flat plate portion of the synthetic resin shutter, and can form an appropriate gap between the flat plate portion and the cartridge case, thereby preventing shutter damage caused by dew condensation, etc. It is possible to provide a disk cartridge that is free from malfunctions and has high operational reliability.

[Brief explanation of the drawing]

1 and 2 are a plan view and a sectional view of a shutter according to a first embodiment of the present invention. 3 and 4 are a plan view and a sectional view of a shutter according to a second embodiment of the present invention. Figures 5 and 6 are a plan view and a sectional view of a shutter according to a third embodiment of the present invention. 7 and 8 are a plan view and a cross-sectional view of a shutter according to a fourth embodiment of the present invention, and FIG. 9 is a partially cross-sectional plan view of a shutter according to a fifth embodiment of the present invention. , FIG. 10 and FIG. 11 are a plan view and a cross-sectional view of a shutter according to a sixth embodiment of the present invention, and the twelfth is an explanatory diagram showing a region where the function of the convex portion can be effectively exhibited in the present invention. FIG. 13 is a perspective view showing the cartridge main body and shutter separated in a conventional magnetic disk cartridge. 9...Flat plate part. 11...Occlusion part, 13...Convex part. DESCRIPTION OF SYMBOLS 10...End plate part, 12...Frame part, l...Car 1-ridge case, 2...Taisuku, 5...Opening part. 7...Shutter, 8...Window, 13
' Fig. Fig. Fig. Fig. 7 /7 Fig. Fig. 4 f' Fig. Fig. 10 Fig. 11

Claims (6)

[Claims] (1) A cartridge case that rotatably stores a disk, and a synthetic resin shutter that is slidably attached to the cartridge case and opens and closes an opening for inserting a head provided in the cartridge case. In the disk cartridge, the shutter has two planar plate portions that face each other and come into elastic contact with the surface of the cartridge, and an end plate portion that connects one edge of both planar plate portions, and has a cross section. 1. A disk cartridge characterized in that the shape is approximately U-shaped, a convex portion is formed on the inner surface of the flat plate portion facing the cartridge case, and a gap is formed between the flat plate portion and the cartridge case. (2) In claim (1), the flat plate portion includes a closing portion that covers the opening of the cartridge case when the shutter is closed, and a portion adjacent to the closing portion having a size substantially the same as the opening of the cartridge case. What is claimed is: 1. A disk cartridge comprising a cylindrical window and a frame surrounding the window and connected to the closing portion, the closing portion being provided with a convex portion. (3) The disk cartridge according to claim (2), wherein the convex portion is provided at least at a substantially central portion of the closing portion. (4) In claim (1) or claim (3),
A disk cartridge characterized in that the convex portion is rib-shaped. (5) In claim (1) or claim (3),
A disk cartridge characterized in that a plurality of the convex portions are formed in an embossed shape at predetermined intervals. (6) In claim (1) or claim (3),
A disk cartridge characterized in that the convex portion is formed with a grain pattern.