Optical disk cartridge

Abstract: A book case type optical disk storage container (7) adapted to house a cartridge type optical disk (1) with its shutter opened, the container being characterized in that one storage surface (8) of the container is provided with a shutter stopper (9) for keeping the shutter open, and a projection (10) for supporting an optical disk base (3) rotatably, the other storage surface (11) being provided with a disk rotating jig (12) and a disk base cleaning means (13); and a structure for preventing the dislocation of a spring in an optical disk cartridge wherein a shutter (23) is opened and closed in accordance with a sliding movement of a sliding jig (24) provided in the inner portion of the shutter and joined to the spring contacting portions of cartridge case via a spring, characterized in that the spring contacting portions of the cases consist of the surfaces of a contacting wall (32), and upper and lower walls (33,34) extending from the contacting wall (32), the lower wall (34) being provided with a spring dislocation preventing projection (36).

Description: This invention relates to a storage container used to carry a cartridge type optical disk, and more particularly to a storage container capable of being used to carry a cartridge type optical disk conveniently, and clean an optical disk base simply during the transportation of the disk. BRIEF DESCRIPTION OF DRAWINGS: Fig. 1 is a perspective view showing the condition of the storage container for optical disks according to the present invention in practical use; Fig. 2 is a perspective view of another embodiment of the storage container for optical disk according to the present invention; Fig. 3 is a perspective view of an optical disk cartridge; and Fig. 4 is a plan view showing a sliding portion of the optical disk cartridge. PRIOR ART: An optical disk protecting cartridge has recently been used most conveniently. In this cartridge, an optical disk base 3 is housed in a cartridge body 2 as shown in Fig. 1, and the disk base 3 is not normally exposed. The disk protecting container is formed so that, when it is inserted into a reader, a shutter 4 provided on the cartridge body 2 is opened manually or automatically to cause a part of the disk base 3 to be exposed. In such a cartridge, the optical disk is protected to a certain extent. In order to more safely protect the optical disk, a suitable storage container capable of housing a cartridge type optical disk therein and carrying the same conveniently may be developed but such a storage container has not yet been put on the market. A container with the precharacterising features of claim 1 is disclosed in US-A-4 520 470. An optical disk is formed so that a laser beam passed through a lens and a base of a plastic (mainly polycarbonate) is condensed on the surface of a recording medium, the controlling of an optical system or the reading of information being done in accordance with the variation of the quantity of the reflected light. When dust is deposited on the surface of the base in use, or, when the surface of the base in use has a flaw, the quantity of the reflected light does not accurately vary due to the influence thereof. Also, the driving of the disk cannot be controlled properly. Therefore, a cleaner for removing the dust deposited on the base surface becomes necessary. A conventional optical disk cartridge uses a very large-scale dust removing device, and a means capable of removing dust from the base surface simply is not known at all at present. According to the invention, the container is characterized in that one storage surface of the container is provided with a shutter stopper for keeping the shutter open and a projection for supporting an optical disk base rotatably. The storage container according to the present invention will now be described with reference to the accompanying drawings. Fig. 1 is a perspective view showing the condition of the optical disk storage container according to the present invention in practical use. Referring to the drawing, a reference numeral 1 denotes a cartridge type optical disk, and a disk base 3 is protected by a cartridge body 2. As described previously, the cartridge body 2 is provided with a laterally slidable shutter 4, which is adapted to be opened when the optical disk is used (the reading is started), to cause the base 3 to be exposed. A reference numeral 7 denotes a book case type container according to the present invention, for storing therein the cartridge type optical disk 1 referred to above. The cartridge type optical disk 1 is adapted to be housed with its shutter opened in the storage container 7, and one storage surface 8 of the container is provided with a shutter stopper 9 for keeping the shutter open. Since the shutter stopper 9 is adapted to stop the returning of the shutter, it may consist of, for example, an elongated projection the length of which is substantially equal to that of an opening of the cartridge. The shape of this projection is not specially limited. The storage surface 8 is also provided at the substantially central portion thereof with a projection 10 for rotatably supporting the optical disk base 3. The optical disk base 3 held in the cartridge has usually a hub 6 provided with a central bore 5, and the base rotating projection 10 is formed so as to be fitted in this central bore 5. In the storage container according to the present invention thus constructed, the optical disk is housed rotatably with the surface thereof exposed. Therefore, if the base surface is wiped with a suitable cleaning means as the disk is turned with the hub portion of the optical disk base held by hand, the dust deposited on the base surface can be removed easily. In order to turn the disk more easily during such a base surface cleaning operation, for example, a disk rotating jig 12 having a hollow shaped so as to be fitted around the projecting hub 6 is conveniently used. The construction of the disk rotating jig 12 is not specially limited. Especially, a disk rotating jig formed to the smallest possible dimensions and provided with a magnet therein can be conveniently. The cleaning means usable for removing the dust include paper, a cloth, an unwoven cloth and sponge. Especially, a cloth consisting of polyester fiber is preferably used. It is desirable that a cleaning means impregnated with an aqueous solution containing a surface active agent or alcohol be used so as not to hurt the disk base during the cleaning of the surface thereof. These disk rotating jig and cleaning means may be stored and transported separately from the storage container according to the present invention. In order to meet the convenience of a user, the jig and cleaning means are preferably housed in the storage container according to the present invention. For example, as shown in Fig. 2, the thickness of the storage container 7 is set somewhat larger than that of the cartridge type optical disk 1, and a storage hollow is provided on a storage surface 11, which is on the opposite side of the storage surface 8 provided with the shutter stopper 9 and disk rotating projection 10, and the disk rotating jig 12 and cleaning means 13 may be stored in this hollow. In the storage hollow, the cleaning agent-impregnated cleaning means may be wrapped and housed, and the cleaning means and cleaning agent may be separately housed. As shown in Fig. 3 an optical disk base 22 is housed in a cartridge 21, and the disk base 22 is not normally exposed. The disk protecting container is formed so that, when it is inserted into a reader, a shutter 23 provided on the cartridge 21 is opened manually or automatically to cause a part of the disk base 22 to be exposed. The opening and closing of the shutter 23 are done in accordance with the lateral movements of a sliding jig joined to an inner portion of the shutter 23. To be more precise, the cartridge 21 consists of two cases 21a, 21b (cases on the sides of A and B surfaces) molded to substantially the same shape, as shown in Figs. 3 and 4. One side, on which slide portions are formed, of the cases 21a, 21b is provided with rails 25a, 25b. The slide jig 24 constituting another member is provided with jig sliding grooves 26a, 26b the size of which is in agreement with that of the rails 25a, 25b, and the sliding jig 24 is held between the cases 21a, 21b slidably. The sliding jig 24 is joined resiliently to the spring contacting portions of the cartridge cases via a spring 27 so that the opening and closing of the shutter 23 are thereby controlled. The sliding jig 24 is normally in the condition shown in Fig. 4, with the shutter closed. In order to produce the optical disk cartridge, the sliding jig 24 is held between the cases 21a, 21b first as described above. After the cartridge is formed by using this step, a spring 27 the free end portions of which are bent at right angles so as to increase the contact surface area thereof is inserted thereinto from the opened surfaces 28 of the sliding portions of the cases. In a conventional cartridge of this kind, the spring 27 is engaged at its free end portions 29, 30 with a free end portion (contacting portion) 31 of the slidig jig 24 and the contacting surfaces 32 of the cases. According to the present invention, the storage container is not specially limited to the above-described construction, and providing a handle for facilitating the opening and closing of the shutter, without changing the general design of the invention is also included in the technical scope of the present invention. The material out of which this storage container is formed is preferably a soft plastic in view of the safety, lightness, handling convenience (for example, the non-slippery property) and suitability with respect to the manufacturing conditions. The storage container according to the present invention can be transported safely without damaging the cartridge type optical disk. Moreover, this storage container permits a disk base to be cleaned even during the transportation thereof, and is generally serviceable as a very convenient portable optical disk storage container.

Claims: A book case type optical disk storage container (7) containing a cartridge with an optical disk (1) having a shutter (4), characterized in that one storage surface (8) of said container is provided with a shutter stopper (9) for keeping said shutter (4) open and a projection (10) for rotatably supporting an optical disk base (3). A book case type optical disk storage container according to claim 1, wherein said storage container is provided therein with a disk rotating jig (12) and a cleaning means (13).

Inventors: AOKI CHIHIRO, HAMANO SEITARO, HIRAMATSU YASUSHI, KAMAKURA KUNIHITO, OHTA SEICHI, AOKI, CHIHIRO, HAMANO, SEITARO, HIRAMATSU, YASUSHI, KAMAKURA, KUNIHITO, OHTA, SEICHI
Applicants: DAICEL CHEM, DAICEL CHEMICAL INDUSTRIES, LTD.
Application year: 1990
Main classification: G11B23
IPC codes: G11B23, G11B33