JPH0682503B2 - Disco Cartridge - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disk cartridge such as a magnetic disk cartridge or an opto-magnetic disk cartridge, and particularly to an upper case and a lower case having a head insertion opening formed therein. The present invention relates to a disk cartridge including a cartridge case made of and a disk that is rotatably housed in the cartridge case.

[Conventional technology]

4 and 7 show a conventionally proposed disk cartridge (Japanese Patent Application No. 60-197749), FIG. 4 is an exploded perspective view of the disk cartridge, and FIG. 5 is a part of the cartridge case. A plan view, FIG. 6 is a plan view of the shutter, and FIG. 7 is a sectional view taken along the line EE in FIG.

Magnetic Disc Cartridge is a Cartridge Case 1
And a magnetic disk 2 rotatably housed in it,
It is mainly composed of a shutter 3 slidably supported by the cart case 1.

The cartridge case 1 is composed of an upper case 1a and a lower case 1b, which are molded of a hard synthetic resin such as ABS resin.

An opening 4 for inserting the rotary drive shaft is formed substantially in the center of the lower case 1b, a rectangular head insertion opening 5 is provided in the vicinity thereof, and a head insertion opening 5 is similarly provided in the upper case 1a. . In the vicinity of the front surfaces of the upper case 1a and the lower case 1b, recesses 6 are formed which are slightly lowered in order to regulate the sliding range of the shutter 3, and the head insertion opening 5 is formed at an intermediate position of the recesses 6. Has been done. Upper case
A guide groove 7 extending along the sliding direction of the shutter 3 is formed near the front surface of 1a. (See FIG. 5.) The front end portion of the case 1a where the guide groove 7 is formed is
A thin portion 21 that is elastically deformed is formed, and when the shutter 3 is mounted on this case as described later, it is elastically deformed to facilitate the mounting of the shutter 3.

As shown in FIG. 4, a hub 8 made of metal is connected to the central portion of the magnetic disk 2 and arranged in the opening 4 of the lower case 1b.

The shutter 3 is made of a synthetic resin such as polyacetal resin or polyamide resin which is slightly harder than the cartridge case 1 and elastically deforms. As shown in FIG. 1, the shutter 3 includes a first face plate part 3a, a second face plate part 3b arranged so as to face the first face plate part 3a, and a connecting plate part for connecting the front end portions of the double side plate parts 3a, 3b. It is composed of 3c and its side surface is U-shaped. First face plate portion 3a and second face plate portion
3b includes a rectangular opening 9 having substantially the same size as the head insertion opening 5 and a closing portion for closing the head insertion opening 5.
10 and 10 are arranged side by side so as to face each other.

In the vicinity of the front surface (connecting plate portion 3c) of the first face plate portion 3a, two projecting pieces 11 project toward the second face plate portion 3b side at a predetermined interval along the sliding direction of the shutter 3. Has been done. As shown in FIG. 7, the projecting piece 11 does not extend perpendicularly to the first face plate portion 3a, but its tip (lower end) side is the connecting plate portion.
It is inclined so as to face the 3c side, in other words, the downstream side in the insertion direction of the cartridge case 1.

In this case, the inclination angle θ of the protrusion 11 is in the range of 95 to 120 degrees, preferably 100 to 110 degrees, and the larger the inclination angle θ, the easier the work of assembling the shutter 3 into the cartridge case 1. However, if the inclination angle θ is too large, the engagement with the guide groove 7 is likely to be unstable. Therefore, the above-described range of the inclination angle θ is recommended.

Also, the thickness d of the protrusion 11 is 0.375 mm for the wall thickness of the shutter 3
A thickness of 0.3 mm, which is thinner than the thickness of the shutter, is preferable because it is easily elastically deformed.

Further, the longer the length l of the protrusion 11 is, the easier the elastic deformation is. For example, for the inner dimension L = 2.8 mm of the shutter 3, l
= 0.7mm should be set.

Between the projecting piece 11 and the edge of the connecting plate portion 3c, a square through hole 12 having a width dimension substantially the same as the width of the projecting piece 11 is formed.

Further, a spring hooking protrusion 13 is formed on the inner surface of the connecting plate portion 3c at a substantially middle position in the height direction of the connecting plate portion 3c, and as shown in FIG. A torsion coil spring 14 is interposed between the position and the position, and the spring elasticity of the torsion coil spring 14 elastically biases the shutter 3 in the direction of closing the head insertion opening.

When the shutter 3 is assembled into the cartridge case 1, a state where the free end sides of the first face plate portion 3a and the second face plate portion 3b of the shutter 3 are opened by a jig (not shown) as shown in FIG. Insert Cartridge Case 1 with. Here, an inclined surface 22 is provided at a corner of the thin portion 21. For this reason, the cartridge 3 is placed on the inclined surface 22 side first and then the shutter 3
When pushed in, the projecting piece 11 of the shutter 3 rides on the inclined surface 22, and while the projecting piece 11 elastically deforms itself and the thin portion 21 slightly elastically deforms, the projecting piece 11 rides over the thin portion 21 and the guide groove. Fit in 7. If the projecting piece 11 is inclined so as to face the downstream side in the insertion direction X of the cartridge case 1 as in this embodiment, the projecting piece 11 is likely to be elastically deformed, and the projecting piece 11 is placed on the thin portion 21. It can be easily fitted into the guide groove 7 after getting over it.

As described above, since the shutter 3 is made of synthetic resin, the metal shutter that has been generally used conventionally has no rigidity (due to its thin wall) and the difficulty of forming the projection ( It is possible to solve the problems such as length) and to make the shutter device easy and improve the operability.

[Problems to be solved by the invention]

However, in the conventional disk cartridge, the depth of the recess 6 becomes smaller as the thickness of the cartridge becomes thinner, and the face plate portions 3a and 3b of the shutter 3 tend to become thinner. There is a risk that the shutter 3 will get over.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a disk cartridge having improved operability and reliability of the shutter.

[Means for solving problems]

In order to solve the above problems, the present invention provides a cartridge case including an upper case and a lower case, a disk rotatably housed in the cartridge case, and a head touch on the recording surface of the disk. In a disk cartridge including a head insertion opening provided on both sides of a luggage case and a synthetic resin shutter that is mounted so as to hold the cartridge storage case and opens and closes the head insertion slot, at least the shutter It is characterized in that the thickness of the root portion of one face plate portion is increased.

[Action]

The disk cartridge according to the present invention has the structure as described above, whereby the rigidity of the face plate portion having an increased thickness is increased, the concave portion can be firmly sandwiched, and the holding in the concave portion can be ensured. A disk cartridge can be provided.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view for explaining an embodiment of the present invention. In the present embodiment, the same reference numerals are used for the same parts as those in FIG. 6, and thus duplicated description will be omitted, but at least one of the face plate portions 3a and 3b is made thicker. In the example shown in FIG. 1, the face plate portion 3b is made thicker than 3a. Specifically, when the face plate portion 3a is 0.35 mm, the face plate portion 3b is selected to have a wall thickness of 0.41 mm.

With such a configuration, the face plate portion 3b is provided with a required rigidity, the shutter 3 is fitted into the recess 6 of the cartridge case 1, and the shutter 3 does not come off from the recess 6 even when the shutter is opened and closed. Since the mounting method of the shutter 3 and the like are as described above, duplicate description will be omitted.

FIG. 2 is a sectional view of a mold structure for explaining the manufacture of the shutter 3 shown in FIG.

The mold comprises a fixed mold 22 and a main slide 23. A corner 24 for forming the protrusion 11 is provided on a part of the fixed mold 22.

The resin material is fixed from the vicinity of the connecting portion 3c of the shutter 3 to the fixed mold.
Injection molding is carried out in the gap between 22 and the main slide 23. When the injected resin has cooled sufficiently, slide the main slide
By pulling out 23 (moving to the left side of the figure), the shutter 3 shown in FIG. 1 is completed.

As a means for thickening the face plate portion 3b, a hole for forming the protruding piece 11 is provided, so that the face plate portion 3a and
This is realized by changing the flow resistance of each of 3b and tilting the main slide 23 downward in FIG. 2 by the resin pressure.

Alternatively, it can be realized by performing gated so that the resin is injected from one face plate portion to the other face plate portion. Further, the R of the two corners of the main slide 23 may be changed to give different flow resistances.

As the resin material, a polyacetal resin, a polyamide resin, or the like can be used, but the mechanical strength can be improved by mixing a filler (for example, 10 to 30% by weight of calcium carbonate) with this resin. You can

FIG. 3 is a sectional view for explaining another embodiment of the present invention.

In the present embodiment, the thickness of the entire face plate portion 3b is thicker in the embodiment of FIG. 1, whereas only the root portion 15 of the face plate portion 3b to the connecting portion 3c is thickened. With such a configuration, the same effect as that of the above embodiment can be obtained.

In each of the above embodiments, only one wall thickness of the face plate portion is thickened. However, if there is a margin in the height of the cartridge, it is possible to thicken each face plate portion 3a, 3b.

〔The invention's effect〕

As described above, according to the disk cartridge of the present invention, at least one of the face plate portions of the shatter is thickened at least at the root portion, so that the rigidity required by the shatter can be obtained, and the recessed portion of the shatter can be obtained. Can be prevented from falling off, and operability and reliability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view of a mold used for manufacturing the shutter shown in FIG. 3, FIG. 3 is a cross-sectional view showing another embodiment of the present invention, FIG. 4 is an exploded perspective view of a conventionally proposed disc cartridge, and FIG. Is a plan view of a part of the cartridge case, FIG. 6 is a plan view of the shutter, and FIG. 7 is a sectional view taken along the line EE in FIG. 1 ... Cartridge case, 1a ... Upper case, 1b ... Lower case, 2 ... Magnetic disk, 3 ... Shatter, 3a, 3b
... Face plate, 3c ... Connecting plate, 5 ... Head insertion slot, 6
...... Concave section, 9 ...... Opening section, 11 ...... Projection piece, 13 ...... Spring hook projection section, 15 ...... Root section.

Claims (1)

[Claims] 1. A cartridge storage case comprising an upper case and a lower case, a disk rotatably housed in the cartridge storage case, and head cartridges provided on both sides of the cartridge storage case so that a head touch is possible on the recording surface of the disk. In a disk cartridge having a head insertion opening provided therein and a shutter made of a synthetic resin which is mounted so as to hold the cartridge insertion case and opens and closes the head insertion opening, at least one face plate portion of the shutter is attached. A disc cartridge that has a thicker root.