JP3302583B2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a disk-shaped medium,
More particularly, the present invention relates to a disk cartridge in which a double-sided or single-sided recordable / reproducible optical disk, a magneto-optical disk and the like are rotatably housed in a case.

[0002]

2. Description of the Related Art In general, an information medium, for example, a disk medium such as a magnetic disk, an optical disk or a magneto-optical disk is used as a disk cartridge housed in upper and lower cases. It is known that a shutter for opening and closing the opening is provided. However, conventionally, for a disk cartridge containing a disk-shaped medium capable of recording / reproducing on both sides, many methods of opening the shutter in both directions have been proposed. For example,
In Japanese Patent Publication No. Hei 7-153221, return spring members are provided on both sides of a sliding shutter independently to urge the shutters in a direction to close the shutters. A case having an operation guide groove is used, and a fixed mold and a movable mold are used as a mold for molding the case.

[0003]

However, in the cartridge composed of the upper and lower cases, since the erroneous insertion preventing concave grooves formed on the side surface of the outer peripheral wall of the case are all formed on the same surface, a molding dimensional error is formed on the mating surface of the upper and lower cases. For example, if the mating surface of the upper case protrudes outward, if the operating rod is inserted into the retracting guide groove on the device side, it will be caught or rattled in operation and adversely affected by the generation of resin shavings. Was a problem. SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge which eliminates these conventional drawbacks, smoothly performs a case pulling-in operation, helps prevent shavings, and has good moldability. .

[0004]

SUMMARY OF THE INVENTION According to the present invention, there are provided openings 11, 12, and 13, into which a recording / reproducing head or a drive shaft can be inserted.
A disk cartridge which rotatably accommodates a recordable / reproducible disk-shaped medium inside an upper and lower case having 21, 22 and a shutter slidably provided with a shutter for opening and closing the openings 11, 12, 21, 22. A groove 30 for preventing erroneous insertion, and a guide groove 31 into which a retracting operation rod on the apparatus side is fitted, the bottom wall of the guide groove 31 being a mating surface side bottom wall. 31 ₁ and formed from the outer surface side bottom wall 31 ₂ which, mating surface side bottom wall 31
₁ is obtained by continuously formed from the outer surface side bottom wall 31 ₂ to the inside via a step 32.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, the shutter has a substantially U-shaped cross section and slides over the front end of the upper and lower cases. A slider fixed to the shutter is provided with a guide on the inner surface of the case. The section guides sliding from the closed state to the open state of the shutter. The shutter is slidably guided by a first slider which engages with a guide portion provided on the case and slides and guides, and a spring is disposed in a gap inside the case so as to be movable at substantially both ends in the width direction of the shutter. The pair of second sliders is engaged by a spring locking portion, so that the shutter moves smoothly, and is durable and can be used safely. When the cartridge is set in the apparatus, the pull-in operation rod fits into the guide groove provided on the outer surface of the upper and lower cases and is transported inward. However, the guide groove is formed on the concave surface having a step at the mating surface of the upper and lower cases. As a result, the operation rod can be smoothly inserted without hitting it, so that it can be used with high reliability without adverse effects, and can be formed easily and inexpensively.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an example of a disk cartridge accommodating an optical disk shown in FIGS. The disk-shaped medium 10 of a suitable information medium is rotatably accommodated, and the drive shaft insertion holes 11 and 21 and the head insertion holes 12 and 22 are formed in the case.
A cartridge provided with a shutter 4 for opening and closing the opening slidably in a shutter sliding area 5 one step lower than the outer surface of the case, wherein the shutter 4 includes an upper plate 41 and a lower plate 42.
And a connecting plate 43 for connecting the upper and lower plates 41 and 42 to have a substantially U-shaped cross section, and the shutter 4 includes a first slider 6 and a second slider 7 for sliding guide on the shutter 4. A spring 8 of an elastic member that urges the shutter 4 in the closing direction.
The slider is attached to the shutter 4 in the case 1,
A first slider 6 which engage sliding the guide section 9 provided 2 engages the guide portion 9 ₁ provided on the case 1 slide, and the first slider across the spring 8 A pair of second sliders 7 and 7 held and held by pressure are applied to the second sliders 7 and 7 by pressing and fixing to a connecting portion 25 having a stopper protruding wall surface provided on the case along both ends of the opening at the center of the case. The shutter 4 is configured to open and close in both directions.

[0007] The upper and lower cases 1 and 2 constituting the cartridge are provided with a groove 30 for preventing erroneous insertion and a guide groove 31 for receiving a retraction operation rod on the apparatus side.
The bottom wall mating surface side bottom wall 31 ₁ and the outer surface side bottom wall 3
1 is formed from _two Metropolitan, it is successively formed from the outer surface side bottom wall 31 ₂ to the inside through the mating surface side bottom wall 31 ₁ a step 32.

In this case, a fixed mold and a movable mold are used as molding dies for the upper and lower cases 1 and 2 and a slide core is used as necessary to integrally mold them. fixed metal but the insertion preventing groove 30 erroneously, the mating surface side of the upper and lower cases including a mating surface side bottom wall 31 ₁ with the step 32 formed by the movable side mold, the other outer surface portions may have an elevated productivity for integrally molding a mold, also formed on the bottom surface of the outer surface side bottom wall 31 ₂ of the mating surface side bottom wall 31 ₁ insertion preventing groove 30 erroneously said with the step 32 It is assumed that it is in the form. In addition, the connecting portion 25 is provided with the gap 2
6, the spring 8 is arranged in the gap 26, and the guide recess 67 of the first slider 6 is fitted and guided and slid from both ends of the connecting portion 25, so that it can be easily incorporated into the case. And contribute to smooth opening and closing operation. The connecting portion 25 is connected to one of a pair of rail-shaped guide portions 9 protruding from the case and is configured to be fitted and guided by a holding portion 61 having the first slider 6 so that a stable sliding operation is performed. Care is taken to maintain it for a long time.

The first slider 6 and the second slider 7 have a vertically symmetric structure, and the second slider 7 is
An assembling structure in which the slider 6 is clamped and held by a spring 8 and the shutter 4 is fixed to the first slider 6 after the upper and lower cases 1 and 2 are fixed after being assembled to one of the upper and lower cases 1 and 2. I do. That is, the shutter 4 is fixed to the first slider 6 and moves at the same time. Second sliders 7, 7 are provided at both ends of the first slider 6 so as to sandwich the first slider 6, and both sliders 6, 7 are subjected to the elastic force of tension by a spring 8 so that the first slider 6 is closed. I'm going.

In this case, both ends of the first slider 6 are formed in a substantially U-shaped holding portion 61 having a gap through which the spring 8 is inserted, and the second sliders 7, 7 are formed.
The spring 8 that is locked in the direction of pulling the coil spring uses a tension coil spring, and the center of the coil spring 8 and the second
A configuration in which the center of the portion of the slider 7 covered by the surrounding wall 72 substantially coincides with that of the slider 4 allows the shutter 4 to move smoothly. Further, a lower shutter sliding area 5 of the case where the shutter 4 slides is provided with a guide 3 by a fixing means such as fusion or bonding to hold the free ends of the shutter upper and lower plates, and the upper and lower cases 1 and 2 are provided. The first slider 6 provided on the shutter 4 that slides across the front side end of the shutter 4 has reinforcing portions 62 at both ends that reinforce the projecting portion 44 of the shutter to which the shutter opening / closing operation member contacts. Hole 45
It is preferable to provide a protruding portion 63 that fits into the projection.

As shown in FIGS. 2 to 5, the first slider 6 has a U-shaped holding portion 61 on both sides of which the second slider 7 contacts. A spring 8 is provided in the gap between the U-shaped holding portions 61.
Is inserted, and a projection 63 is provided in the middle thereof.
, And is fixed to the shutter 4 by an elastic arm 65 between the two projections 63. The second slider 7, the rail 73 is fitted into the guide 9, 9 ₁ of the case inner surface, and支杆74 that fits into the recess 66 of the first slider 6, engages in a U-shaped holding portion 61 , Spring 8
Of the first slider 6 and the second slider 7
Are integrated to make the movement of the shutter 4 smooth, and the durability is also improved.

With such a configuration of the first and second sliders 6 and 7, when the shutter 4 is opened, the first slider 6 and the second slider 7 can be opened and closed integrally. During assembly, the first slider 6, the second slider 7 (two pieces), and the spring 8 are temporarily assembled and easily assembled into the lower case 2 (one of the upper and lower cases). As a result, the spring 8 is fitted into the gap 26 in the connecting portion 25, and can be stably accommodated. Since the upper and lower cases 1 and 2 have substantially the same shape, the lower case 2 has been described, but the same applies to the upper case 1.

The shutter 4 is fixed to the first slider 6 and, for example, a convex guide portion 64 of the first slider 6.
Then, the sliding section is guided from the closed state to the open state by the guide portion 9 on the inner surface of the case. In addition, two erroneous erasure preventing members 13 for selectively setting whether or not recording on the disk is possible are provided inside the case so as to be independently movable for the upper surface and the lower surface of the disk. The shutter 4 is injection-molded using a polyacetal resin or the like and is formed in a substantially U-shaped cross section. However, when a resin is used, compared with a metal (for example, stainless steel or surface-treated aluminum),
It has the advantages of being inexpensive, lightweight, and of being relatively easy to make, even with complex shapes.

In the drawing, reference numeral 72 denotes a spring engaging portion, 19 denotes a label area, and 20 denotes a positioning hole of a disk cartridge.

[0015]

According to the present invention, a recordable / reproducible disk-shaped medium is rotatably housed in a case having openings 11, 12, 21, 22 into which a recording / reproducing head or a drive shaft can be inserted. And the openings 11, 12,
A disc cartridge having a shutter for slidably opening and closing 21 and 22 and a spring for urging the shutter in a closing direction, wherein a groove for preventing erroneous insertion is provided on the outer surface of the upper and lower cases, and a guide groove for fitting the pull operating lever, the bottom wall of the guide groove is formed from the mating surface side bottom wall 31 ₁ and the outer surface side bottom wall 31 ₂ which, mating surface side bottom wall 31
By ₁ that was inside was formed continuously from the outer surface side bottom wall 31 ₂ via a step 32, inserted smoothly without the operating rod hits for that is the concave surface facing the guide groove with a step in the mating surfaces of the upper and lower casing It can be used with high reliability without any adverse effects, and the cartridge can be smoothly pulled into the device, helps to prevent shavings, improves moldability, and improves molding Even if an error occurs, stable production with little defective assembly can be performed even in automatic assembly, and a highly reliable disk cartridge can be obtained in an inexpensive form.

[Brief description of the drawings]

FIG. 1 is a perspective view of a separated state showing an embodiment of the present invention.

FIGS. 2A and 2B show a state in which a shutter is incorporated and an upper case is removed, wherein FIG. 2A is a partially cutaway plan view, and FIG.

3A and 3B show enlarged details of a part of the example of FIG. 2, wherein FIG. 3A is a plan view, FIG. 3B is a longitudinal sectional view taken along line AA, and FIG. 3C is a perspective view.

FIG. 4 is an enlarged perspective view of the shutter of FIG. 2 in a separated state.

FIG. 5 is an enlarged vertical sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Guide 4 Shutter 5 Shutter sliding area 6 First slider 7 Second slider 8 Spring 9,9 ₁ Guide section 10 Disk 11,21 Drive shaft insertion hole 12,22 Head insertion hole 13 Erroneous erasure prevention Member 20 Positioning hole 25 Connecting portion 26 Gap 28 Front end side 30 Groove for preventing incorrect insertion 31 Guide groove 31 ₁ Fitting surface side bottom wall 31 ₂ Outer surface side bottom wall 32 Step 41 Upper plate 42 Lower plate 43 Connecting plate 44 Projection 61 U-shaped holder

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 23/03-23/033

Claims (3)

(57) [Claims] 1. A recordable / reproducible disk-shaped medium 10 is rotatable inside upper and lower cases 1, 2 having openings 11, 12, 21, 22 into which a recording / reproducing head or a drive shaft can be inserted. While being stored, the openings 11, 1
A disc cartridge slidably provided with a shutter 4 for opening and closing 2, 21 and 22;
The insertion preventing groove 30 erroneously on the outer surface of 2, and a guide groove 31 for fitting the pull operating lever of the device side, a bottom wall mating side bottom wall 31 ₁ and the outer surface the bottom surface of the guide groove 31 Wall 31 ₂
Disk cartridge characterized in that it is formed, and the mating surface side bottom wall 31 ₁ inside the continuously formed from the outer surface side bottom wall 31 ₂ via a step 32 and a. 2. The upper and lower cases 1 and 2 are provided with a groove 30 for preventing erroneous insertion and a bottom wall 31 on the mating surface side having the step 32.
_The upper and lower cases including ₁ are formed by the movable mold on the mating surface side, and the other outer surface portion is formed by the fixed mold.
The outer surface side bottom wall 31 ₂ of the disk cartridge according to claim 1, characterized in that a projecting configuration than the mating surface side bottom wall 31 ₁ to be formed at the movable mold to be formed at the fixed mold. 3. The shutter 4 has an upper plate, a lower plate, and a connecting plate connecting the upper and lower plates, and has a substantially U-shaped cross section. The shutter is fixedly assembled to a slider, and the slider is mounted on a case. 3. The disk cartridge according to claim 1, wherein the disk cartridge is slidably provided.