JP2564392Y2 - Optical disk cartridge - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk cartridge, and more particularly to an improvement in a shutter guide provided for stably opening and closing a shutter.

[0002]

2. Description of the Related Art In a CD-ROM, a write-once optical disc, a rewritable optical disc, and the like, an optical disc cartridge (hereinafter, also referred to as a cartridge) containing an optical disc (hereinafter, also referred to as a disc) is provided.
Normally, as shown in FIGS. 7 and 8, a shell 11 for accommodating a disk and an opening window 11a of the shell 11 for protecting the disk and performing recording and reproduction on the disk.
A shutter 12 urged by a spring (not shown) to open and close the shutter 11 is provided so as to straddle the front and back surfaces of the shell 11.

A shutter guide 13 separate from the shell 11 is attached to the outer surface of the shell 11 so as to always cover one end of the shutter 12 so that the shutter 12 does not accidentally come off the shell 11. It is common. For this reason, conventionally, there are problems that the number of parts of the cartridge is large and that the assembling operation becomes very complicated in automation.

Further, the width W5 of the shutter guide 13 (length extending in the opening and closing direction of the shutter, hereinafter also referred to as a shutter guide width) W5 is equal to the width W4 of the shutter 12 (length covered by the shutter guide, hereinafter also referred to as a shutter width). Since the shutter guide 13 is always disposed so as to cover the entire shutter width W4 irrespective of the open / closed state of the shutter 12, the shutter guide 13 and the shell 11 are particularly large when the shutter 12 is fully closed. A gap S is formed, and this gap S
There is a problem that foreign matter such as dust invades the disk drive and hinders the drive of the disk drive, and the shutter guide 13 is deformed or dropped.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention has been devised in order to solve the above-mentioned problems. The number of parts and the number of steps in assembling are reduced as much as possible, and the shutter opening and closing operation is always performed stably. It is an object of the present invention to provide an optical disk cartridge capable of performing the above.

[0006]

In order to achieve the above object, according to the present invention, a shell for accommodating an optical disk, a shutter for opening and closing an opening window provided on one surface side of the shell, and a shutter for opening and closing the opening window are provided. An optical disc cartridge having a shutter guide formed along one side, the shutter guide always covering one end of the shutter, and fitting the one end into a gap with a shell so that the shutter can be opened and closed. Is formed integrally with the shell so that the length in the sliding direction is shorter than the width in the same direction of the shutter, and a protrusion protruding in the closing direction is provided at one end of the shutter, and the protrusion is formed. It is characterized in that a recess for locking is provided in the shell inside the shell and covered with the outer surface.

Further, a projection protruding in a closing direction of the shutter may be provided at one end of the shutter, and a concave portion for locking the projection may be provided in the shell.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 (a) and 1 (b), an optical disk cartridge C1 covers a polycarbonate 1 which accommodates a disk D, and an opening 1a provided on one surface of the 1st. A shutter 2 made of stainless steel for opening and closing the shutter 1a, formed along one side of the opening window 1a, and always covering one end of the shutter 2 and fitting the one end into a gap with the shell to open and close the shutter 2 Shutter guide 3 that guides freely, and optical disc D
And write protect 4 which can prohibit writing. The cartridge C1 is ISO standard φ86 (mm)
An optical disk is housed therein. In addition, shell 1
In addition to the above, an ABS resin or the like can be used as the material of the shutter 2, and a resin such as polyacetal can be used for the shutter 2.

As shown in FIGS. 2 and 3, the shell 1 and the shutter guide 3 are integrally formed by an injection molding method. Further, the shutter guide width W2, that is, the length of the shutter 2 in the sliding direction is shorter than the shutter width W1, and when the shutter 2 is fully closed (FIG. 1).
In (a)), the shutter guide 3 has a shutter guide width W.
One end of the shutter 2 is covered for two minutes, and when the shutter 2 is fully opened (FIG. 1B), the shutter guide 3 is
Of the shutter width W1. Here, the overlap width W3 of the shutter 2 and the shutter guide 3 when the shutter 2 is fully closed is 1 to 2 mm (according to the ISO standard, if the maximum shutter width W1 is 27 mm, the shutter guide width W2 is 25 mm to 26 mm). It is about.

With the above configuration, the shutter guide 3
Does not require a step of sticking to the shell 1, and the number of parts and the number of steps are reduced as compared with the conventional case. Further, when the shutter 2 is closed, there is no gap between the shutter guide 3 and the shell 1, so that foreign matter such as dust does not enter between the shutter 2 and the shutter guide 3 as in the related art. There was no problem in driving the disk drive.

Further, 10 cartridges having the above structure were prepared, and a drop impact test was performed from a height of about 760 mm.
The shutter 2 did not fall off even after 50 drops. Next, details of the cartridge of this embodiment will be described in detail. FIG. 4A is an enlarged view of the deformation of the E1 part in FIG.
As shown in FIG. 4B, which is an enlarged view of a portion E2 in FIG. 1B, a convex portion 2a (length 1 to 5 mm) is provided at one end of the shutter 2 so as to project in the closing direction of the shutter 2. When the shutter 2 is closed as shown in FIG. 4A, a concave portion 1b for locking the convex portion 2a is provided on the shell 1 inside the shell 1 and covered with the outer surface. It is provided on the inner wall surface of the shell 1 so as not to be exposed to the outside. In the open state of the shutter 2, the state becomes as shown in FIG.
The overlapping width W5 of the projection 2a and the shutter guide 3 is 2
~ 7mm. With this configuration, the shutter 2 and the shell 1 are securely locked, and a more stable opening and closing operation of the shutter 2 can be realized, so that a highly reliable cartridge can be provided. Note that the shape of the convex portion 2a is not limited to a square shape, and is not limited to FIGS.
As shown in (c), various deformations such as a circle and a triangle can be considered. Further, a concave portion is formed in the shell 1 in accordance with the deformation.

In the above-described embodiment, an example of a cartridge of φ86 (mm) is shown. However, even in a large cartridge for φ130 (mm) or the like, the overlapping width of the shutter 2 and the shutter guide 3 is appropriately changed. This is sufficiently feasible. In addition, the shape of the shell 1 and the shutter 2
The material is not limited to the above-described embodiment, and can be appropriately changed and implemented without departing from the gist of the present invention. For example, as shown in FIG. 1 may also be provided on the back side (usually the non-clamping side without the shutter guide 3). In this way, the opening and closing operation of the shutter 2 is further ensured, and a cartridge that is robust against impacts and the like can be provided. It is possible to provide. 4 and 5 in this case.
As shown by, a convex portion is formed at one end of the shutter 2, and
A concave portion for locking this may be provided on the shell 1 side.

[0013]

According to the optical disk cartridge of the present invention, since the shutter guide and the shell are integrally formed, the number of parts of the optical disk cartridge can be reduced, and the assembling process can be simplified and automated. In addition, a large number of inexpensive products can be provided by enabling simple and easy production.

Further, since the width of the shutter guide is shorter than the width of the shutter, it is possible to prevent foreign matter such as dust from entering the gap formed between the shutter and the shutter guide as much as possible. This eliminates the problem of hindering the drive of the disk drive.

Furthermore, a convex portion is provided at one end of the shutter, and a concave portion is provided for locking the convex portion inside the shell while being covered with the outer surface, thereby realizing a more stable shutter opening / closing operation. And a highly reliable cartridge can be provided. Further, when the shutter guide is provided on the non-clamping side, the reliability becomes higher.

[Brief description of the drawings]

FIG. 1 is a plan view of an optical disk cartridge according to the present invention, in which (a) is a plan view showing a fully closed shutter;
FIG. 4B is a plan view illustrating a fully opened shutter.

FIG. 2 is a partial cross-sectional view taken along the line AA in FIG.

FIG. 3 is a perspective view of a portion of the optical disc cartridge according to the present invention, in which a shutter guide is formed;

FIGS. 4A and 4B are enlarged views illustrating details of the optical disk cartridge of the present invention, wherein FIG. 4A is a plan view in which a portion E1 in FIG. 1A is deformed and enlarged, and FIG. It is a top view which expands and deforms a part.

FIGS. 5A to 5C are plan views each showing a modification of a convex portion.

FIG. 6 is a plan view of the non-clamping side of the optical disc cartridge according to the present invention.

FIG. 7 is a plan view of a conventional optical disk cartridge.

8 is a partial sectional view taken along line BB in FIG. 7;

[Explanation of symbols]

1,11 ··· Shell 2,12 ·
.. Shutters 1a, 11a.
.. Shutter guide 4 ・ ・ ・ Write protect C1, C2 ・ ・ ・ Optical disk cartridge D ・ ・ ・ Disk

Claims (1)

(57) [Scope of request for utility model registration] 1. A shell for accommodating an optical disk, a shutter for opening and closing an opening window provided on one surface side of the shell, and formed along one side of the opening window and always covering one end of the shutter. And a shutter guide having one end fitted into a gap between the shell and a shutter capable of opening and closing a shutter, wherein the length of the shutter guide in the sliding direction is greater than the width of the shutter in the same direction. The shutter is formed integrally with the shell, and a projection protruding in the closing direction is provided at one end of the shutter, and a recess for locking the projection is covered inside the shell and on the outer surface. An optical disk cartridge provided on the shell in a state.