JP2568133Y2 - Disk cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cassette for storing an optical disk or a magneto-optical disk as a recording medium.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Application Laid-Open Publication No. 63-130974, in consideration of the moldability of the case, the case of a disk cassette is composed of two cassette shells divided at an intermediate position when viewed from the cross section. It was formed by combining.

[0003]

The disc cassette is required to have a high precision in its structure in order to perform functions such as taking in and out of a drive unit and positioning with a read / write head. Therefore, the thickness of the disk cassette also needs to be formed with a certain accuracy or higher. In a conventional disk cassette, in order to ensure the accuracy with respect to the thickness of the case, it is necessary to obtain the accuracy when two cassette shells are combined. That is, since the error in the accuracy with respect to the thickness of the disk cassette is the sum of the error in the accuracy with respect to the thickness of each cassette shell, the accuracy with respect to the thickness of each cassette shell needs to be considerably high. In order to achieve such accuracy, the production cost has risen, which has been a problem.

An object of the present invention is to provide a disk cassette which only needs to consider the accuracy with respect to the thickness of one sheet in order to obtain the accuracy with respect to the thickness of the disk cassette in view of the above problems.

[0005]

In order to achieve this object, the present invention adopts the following configuration. That is, a disk, a case for accommodating the disk, and one upper surface portion and two side surface portions connected to both sides of the upper surface portion are formed in a U-shaped cross section, and the two side surface portions are formed. A shutter slidably provided so as to sandwich the case, and a shutter fixed to the shutter and slidably supported by the case so that the shutter is moved between the open position and the closed position. A reciprocally movable slider, wherein the case has a thickness greater than the thickness of the disk.
A disk housing case member having a recess for accommodating the formed depth the disc therein, is formed in a plate shape as a lid of the disk housing case member, the disc
With the above disk stored in the storage case member exposed
And a lid-like case member that covers the surface of the disk cassette.

[0006]

In the case of the disk cassette of the present invention, the case for storing the disk is composed of a disk storage case member and a lid.
And a case member. And the disk storage card
The base member is formed to a depth greater than the disk thickness.
It has a recess for accommodating the
The disk member is a plate-shaped lid for the disk storage case member.
The disk stored in the disk storage case member.
It is configured to cover the exposed surface of the metal. this
As a result, the thickness of the disk storage case member occupies most of the thickness of the disk cassette, and fine adjustment of the thickness of the entire disk cassette can be adjusted by the thickness of the lid-like case member. Therefore, the accuracy of the thickness of the entire disc cassette is that most of the accuracy with respect to the thickness of the disk storage case member is sufficient, and it is only necessary to consider the accuracy with respect to the thickness of one disk storage case member. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall view of a disk cassette 1 as one embodiment of the present invention. Disc cassette 1
Comprises a case 3, a slider 5, a shutter 7, a magneto-optical disk 9, a spring 11, and the like.

The case 3 is made of a synthetic resin, and is configured by fixing a lid-like case member 13 and a disk storage case member 15 shown in FIGS. 2 and 3 respectively. 2A and 2B show the lid-like case member 13, FIG. 2A is a front view, FIG. 2B is a plan view,
2C is an AA end view, and FIG. 2D is a BB end view (enlarged view). Lid-like case member 1 having a substantially square plate shape
3 includes an opening 21, a first guide ridge 23a, a second guide ridge 23b, a first guide wall 25a, and a second guide wall 25.
b, a shutter sliding surface 26, a circular base 27, a label sticking surface 28, a screw boss 29, a circular opening 30, and the like. The opening 21 serves as a window for exposing the magneto-optical disk 9 to the outside when the disk cassette 1 is mounted on the disk recorder and information on the magneto-optical disk 9 is read or written. The first support ridge 23a and the second guide ridge 23b come into contact with the first support portion 55 and the third support portion 59 of the slider 5 shown in FIG. Are sure. First
The guide wall 25a and the second guide wall 25b are formed by the shutter fixing portion 53 and the second support portion 57 of the slider 5 shown in FIG.
Contact each from above. Thus, the support of the slider main body 51, which will be described later, by the regulating wall 33 is further ensured. The shutter sliding surface 26 is formed with a shallow concave surface so that the shutter 7 comes into contact therewith and slides. The circular base portion 27 is provided so that the magneto-optical disk 9 is mounted thereon so that the disk cassette 1 containing the magneto-optical disk 9 is not largely shaken when the lid-shaped case member 13 is combined. . Label sticking surface 28
Has a shallow concave surface so that the label of the disc cassette 1 can be attached thereto. The concave surface is a mirror surface so that an adhesive label can be attached. The screw bosses 29 are provided at the four corners of the lid-like case member 13, respectively. The screwing boss portion 29 has a circular projection as a protruding piece having a tip portion larger than the base portion, and a screw hole 29a is provided at the center thereof.

FIG. 3 shows the disk storage case member 15, FIG. 3 (a) is a front view, FIG. 3 (b) is a plan view,
FIG. 3C is an AA end view (enlarged view), and FIG.
It is an end view (enlarged view) of -B. The disk storage case member 15 has a long opening 31, a regulating wall 33, and a guide ridge 3.
5, guide groove 37, slider guide rail 39, disk storage wall 41, boss receiving portion 43, spring fixing portion 4
5. A case side edge wall 47 and the like are provided. In the disk storage case member 15, a concave portion for storing the magneto-optical disk 9 therein is formed by the disk storage wall 41.

The long opening 31 serves as a window for exposing the magneto-optical disk 9 to the outside when the disk cassette 1 is mounted on a disk recorder and information on the magneto-optical disk 9 is read. The regulating wall 33 is a bar-shaped support member having a trapezoidal cross section, and is provided so as to bridge both upper ends of the long opening 31. The restricting wall 33 supports the slider main body 51 forming the main part of the slider 5 shown in FIG. A fourth support portion 61 of the slider 5 shown in FIG.
The upper surface 61a of the slider 5 abuts from below, and the guide groove 37 is engaged with one end 55a of the first support portion 55 of the slider 5 to ensure sliding of the slider 5. A hook-shaped fifth support portion 63 of the slider 5 is engaged with the upper end of the slider guide rail 39 to prevent the sliding direction of the slider 5 from shifting. The disk storage wall 41 is erected inside the disk storage case member 15 so as to draw a circle slightly larger than the magneto-optical disk 9.
1 is formed so as to be slightly higher than the thickness of the magneto-optical disk 9. The upper edge of the disk storage wall 41 contacts the inner surface of the lid-shaped case member 13 when the lid-shaped case member 13 and the disk storage case member 15 are combined. In this way, a circular storage chamber is formed and isolated from other components, thereby preventing the ingress of dust and dust. The boss receiving portions 43 are provided at four positions facing the screwing boss portions 29,
It is a screwed portion where the lid-like case member 13 and the disk storage case member 15 are fixed. The boss receiving portion 43 is formed of a boss receiving hole 43b having a short cylindrical shape and a hole having an inner space larger than an entrance in a central portion, and a through hole 43a is provided on a bottom surface thereof. This boss receiving part 43
Is temporarily fixed by screwing the boss portion 29 into the boss receiving hole 43b, and in this state, a screw is screwed into the screw hole 29a while being passed through the through hole 43a. Thus, the lid-like case member 13 and the disk storage case member 15 can be completely fixed. The spring fixing portion 45 is a short ridge wall for supporting one end of the spring 11. The case side wall 47 is provided on each of the three sides except the side where the long opening 31 is provided, and forms a side wall as shown in FIG. When the disk storage case member 15 and the lid-shaped case member 13 are combined, the case side edge walls 47 become three side portions of the case 3 excluding the mounting surface of the shutter 7.
The case side edge wall 47 forms a recess in the disk storage case member 15 for storing the magneto-optical disk 9 therein.

FIG. 4A shows the slider 5. 4A is a front view, FIG. 4B is a plan view, FIG.
4C is a left side view, and FIG. 4D is a right side view. The slider 5 includes a slider body 51, a shutter fixing portion 5
3 and support portions 55, 57, 59, 61, 63 for making the slider 5 slidable in the longitudinal direction.

As shown in FIG. 4, the slider 5 has a first support portion 55 at the lower right end and a second support portion at the upper right end.
It has a support portion 57 and a fifth support portion 63, and the elongated slider body 51 supports them. The slider main body 51 is provided with a shutter fixing portion 53 at the left half as viewed in the drawing, and a third support portion 59 and a fourth support portion 61 are provided at the lower left end thereof.

That is, the slider main body 51 forms a main part of the slider 5 and supports all the components 55 to 63 of the slider 5. The shutter fixing portion 53 includes the shutter 7
It is provided to fix the slider 5 and the slider 5. The upper surface metal claws 71 and the side metal claws 73 provided on the upper surface portion 7b and the short side surface portion 7a of the shutter 7 shown in FIG. First shutter engaging portion 53a, second shutter engaging portion 5
3b is provided. The first support portions 55 abut against the first guide ridges 23 a of the lid-shaped case member 13 and the guide grooves 37 of the disk storage case member 15, respectively. Second
The support portion 57 is provided on the second guide wall 25 of the lid-shaped case member 13.
abuts on b from above. The third support portion 59 contacts the second guide protrusion 23b of the lid-like case member 13 from below. 4th
The support portion 61 contacts the guide ridge 35 from below. The hook-shaped fifth support portion 63 abuts so as to sandwich the slider guide rail 39. Thus, each support 5
5 to 63 allow the slider 5 to slide stably in the case 3. The slider 5 is provided with a short groove for fixing the spring 11 and a spring fixing portion 65.

The shutter 7 is made of metal and has a U-shaped cross section from two side portions (short side portion 7a and long side portion 7c) and one upper surface portion 7b. The shutter 7 has an upper surface metal claw 71 on an upper surface portion 7b and a short side surface portion 7b.
A side metal claws 73 are cut and raised so as to be curved inward and extend.

FIG. 4E is a cross-sectional view showing how the shutter 7 and the slider 5 are fixed. As shown in the figure, the upper surface metal claws 71 and the side metal claws 73 of the shutter 7 are fixed by being fitted into the first shutter engagement portion 53a and the second shutter engagement portion 53b, respectively.

FIG. 5 shows a screw boss 29 as a projecting piece having a tip portion larger than the base portion, and the screw boss portion 2 thereof.
9A and 9B are a front view and a cross-sectional view showing a boss receiving hole 43b as a hole having an inner space larger than an inlet provided at a position facing 9; As shown in FIG. 5 (a), the screwing boss portion 29 may be cracked so that it can be fitted into the boss receiving hole 43b, or as shown in FIG. 5 (b), May be cracked. By changing the length and the interval of the front crack, the strength of fitting between the screw boss portion 29 and the boss receiving hole 43b can be adjusted.
Further, the screw boss portion 29 and the boss receiving hole 43
b may be provided on either the lid-like case member 13 or the disk storage case member 15, respectively.

After this fitting, as in the above-described embodiment, the fitting can be temporarily fixed and completely fixed by screwing or welding. In this case, it is possible to mount the magneto-optical disk 9 or the like on the disk storage case member 15 and perform the destruction while temporarily fixing the disk. At this time, even if a defect is detected in an internal component such as the magneto-optical disk 9, the component can be easily replaced by removing the fitting portion of the case 3. Further, by making the fitting strong, not only a temporary fixing but also a final fixing can be achieved. The fitting by the protruding piece and the hole is not limited to the disk cassette 1 of the present embodiment, but is also used for a conventional disk cassette or the like in which the case 3 is combined at an intermediate position when viewed from the cross section. it can.

FIG. 6 is a sectional view showing a state where the lid-like case member 13 and the disk storage case member 15 are combined and fixed. As described above, in the case of the disk cassette 1 of the present invention, the thickness of the disk storage case member 15 occupies most of the thickness of the disk cassette 1, and fine adjustment of the thickness of the disk cassette 1 as a whole is
It can be adjusted by the thickness of the lid-like case member 13. Therefore, the accuracy of the thickness of the disk cassette 1 as a whole is almost the same as the accuracy of the thickness of the disk storage case member 15, and it is only necessary to consider the accuracy of the thickness of one disk storage case member 15. Will be.

Further, since most of the internal components are stored in the disk storage case member 15, the disk storage case member 15 can be stacked or arranged without the lid-like case member 13 attached to the disk storage case member 15 so as to be passed between work processes such as a quality test. Can be. Further, by adopting a structure that enables the temporary fixing as described above, it is possible to prevent the internal components from jumping out between processes.

FIG. 7 shows a main part when the slider 5 and the shutter 7 are mounted by combining the lid-like case member 13 and the disk storage case member 15. FIG.
7A is a front view, FIG. 7B is a plan view, and FIG.
It is -A sectional drawing. An elongated slider body 51 that forms a main part of the slider 5 and supports all the components of the slider 5 slides inside the case 3. FIG. 7C shows a state where the screw fixing boss portion 29 provided on the lid-shaped case member 13 is temporarily fixed by being fitted into the boss receiving hole 43 b provided on the disk storage case member 15. ing.

As described above, in the disk cassette 1 as one embodiment of the present invention, fine adjustment of the thickness of the entire disk cassette 1 can be adjusted by the thickness of the lid-shaped case member 13. Also, before the magneto-optical disk 9 is assembled and completely fixed by the screw boss portion 29 provided on the lid-like case member 13 and the boss receiving hole 43b provided on the disk storage case member 15, The magneto-optical disk 9 was inspected, and it was possible to easily replace the magneto-optical disk 9 in the case of a malfunction of the magneto-optical disk 9 or the like. As a result, the operation of the disk assembling step is simplified, and the defect of the magneto-optical disk 9 due to a mistake during movement can be prevented.

[0022]

As described in detail above, according to the disk cassette of the present invention, in order to obtain the accuracy with respect to the thickness of the disk cassette, it is only necessary to consider the accuracy with respect to the thickness of one sheet.

[Brief description of the drawings]

FIG. 1 is an overall view of a disk cassette as one embodiment of the present invention.

FIG. 2 is an explanatory view showing the lid-like case member;
(A) is a front view, (b) is a plan view, (c) is an AA end view, and (d) is a BB enlarged end view.

3A and 3B are explanatory views showing the disk storage case member, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG.
FIG. 4A is an enlarged end view of FIG.

4A and 4B are explanatory views showing a state where the slider and the shutter are fixed to the slider, wherein FIG. 4A is a front view of the slider, FIG. 4B is a plan view of the slider, and FIG. The left side view of the slider, (e),
FIG. 4 is a cross-sectional view showing a state where the shutter and the slider are fixed.

5A and 5B are explanatory views showing the shapes of a boss portion and a boss receiving hole; FIG. 5A is an explanatory diagram showing a boss portion having a crack; and FIG. 5B is a diagram showing a boss receiving hole having a crack. It is explanatory drawing which shows a thing.

FIG. 6 is a cross-sectional view when a lid-like case member and a disk storage case member are combined.

FIG. 7 is an explanatory view showing a main part when a lid-like case member and a disk storage case member are combined and a slider and a shutter are mounted, (a) is a front view,
(B) is a plan view, and (c) is an AA cross-sectional view.

[Explanation of symbols]

1 ... disk cassette, 3 ... case, 5 ...
Slider, 7 ... Shutter, 7a ... Short side, 7b ... Top, 7c ... Long side, 13 ...
· Lid-shaped case member, 15 · · · Disk storage case member, 29 · · · screw boss, 29a · · · hole, 41
... Disc storage wall, 43 ... Boss receiving part, 43a
... Through hole, 43b ... Boss receiving hole, 47 ... Case side edge wall

Claims (2)

(57) [Scope of request for utility model registration] 1. A disk, a case for accommodating the disk, and one upper surface and two side surfaces connected to both sides of the upper surface are formed in a U-shaped cross section. A shutter slidably provided so as to sandwich the case by the side surfaces of the shutter, and a shutter fixed to the shutter and slidably supported by the case to open and close the shutter to the open position and the closed position. A disk cassette comprising: a slider configured to reciprocate between the disk and a disk storage case member, wherein the case is formed to a depth greater than the thickness of the disk and has a recess for housing the disk therein; The disk storage case member is formed in a plate shape as a lid, and the disk storage case member stores the data stored therein.
A lid-like case member for covering an exposed surface of the disk. 2. One of the disk storage case member and the lid-like case member is provided with a projecting piece having a tip end portion larger than a base portion, and the other of the disk storage case member and the lid-like case member is provided with the projecting piece. When a pressure is applied by combining the disc storage case member and the lid-shaped case member by providing a hole having a larger internal space than the entrance at a position facing the opening, the projecting piece and the hole are formed. 2. The disk cassette according to claim 1, wherein the disk cassette can be fitted.