JPH0567959U - Disk cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] A cartridge body 2 in which a disk 3 is rotatably housed has openings 4 and 5 for exposing a part of the disk 3, and a shutter for opening and closing the openings 4 and 5. In a disc cartridge in which 6 is slidably mounted, dust is prevented from entering and the tip end portion 6a of the slider 6 is prevented from rising from the cartridge body 2 with a simple structure having a small number of parts. [Structure] A hook-shaped engaging piece portion 8 is provided at a tip portion 6a of the shutter 6, and the engaging piece portion 8 is slidably engaged with the cartridge body 2 at a position hidden by the shutter 6 when the shutter 6 is closed. The guide slot 9 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk cartridge for accommodating a magneto-optical disk or the like, and particularly to the structure of the shutter.

[0002]

[Prior Art]

 First, the configuration of a conventional disc cartridge will be described with reference to FIGS. In the figure, reference numeral 1 denotes a disk cartridge as a whole, and numeral 2 denotes a main cartridge body, and a disk (magneto-optical disk) 3 is rotatably accommodated inside the cartridge main body 2. A circular opening 4 is formed in the center of the cartridge body 2, and a square opening 5 is formed in front of the circular opening 4. The center of the disk is exposed from the circular opening 4, and the square opening 5 is exposed. The part of the signal recording surface of the disc is exposed.

A shutter 6 is mounted on the cartridge body 2 to cover the openings 4 and 5 and protect the internal disk 3. The shutter 6 is formed by bending a sheet metal along the surface of the cartridge body 2. When the disc cartridge 1 is not used (at the time of storage), the shutter 6 closes the openings 4 and 5. Then, the disk 3 is protected (FIG. 6A), and when the disk cartridge 1 is inserted into the disk drive device, the shutter opening mechanism on the disk drive device slides the shutter 6 in the opening direction to open the openings 4 and 5. Then, in this state, the turntable of the disk rotation driving mechanism is inserted from the circular opening 4 and the optical head faces the disk from the rectangular opening 5.

In the disk cartridge 1 configured as described above, in order to prevent the front end portion 6 a of the slider 6 from floating above the cartridge body 2, a pressing plate 7 is fixed to the cartridge body 2, and the pressing plate 7 is fixed to the cartridge body 2. A structure is adopted in which the tip portion 6a of the slider 6 is slidably held between the cartridge 7 and the cartridge body 2 and is held.

[0005]

[Problems to be solved by the device]

 However, the disk cartridge 1 having such a structure for preventing the tip portion 6a of the shutter 6 from being lifted up has a large number of parts due to the fixation of the pressing plate 7, and the number of assembling steps also increases, resulting in cost increase and cost reduction. Was a major obstacle for The present invention has been made in view of the above point, and provides a disc cartridge having a structure that can securely prevent the tip portion of the shutter from rising without using a pressing plate as in the conventional case. The purpose is to solve the problem.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a cartridge body in which a disc is rotatably housed has an opening for exposing a part of the disc, and a shutter for opening and closing the opening is slidably mounted. In the disk cartridge made up of the above, a hook-shaped engaging piece is provided at the tip of the shutter, and the engaging piece is slidably engaged with the cartridge body at a position hidden by the shutter when the shutter is closed. The guide groove hole is formed.

[0007]

[Action]

 In the disk cartridge of the present invention having such a structure, since the engaging piece portion and the guide groove hole are engaged with each other, it is possible to reliably prevent the tip portion of the shutter from being lifted up without using a pressing plate as in the conventional case. Compared with conventional products, the number of parts and the assembly process are reduced, enabling cost reduction. When the shutter is closed, the guide slot is hidden by the shutter, so there is no risk of dust entering the cartridge body through the guide slot.

[0008]

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. Parts corresponding to those in the conventional example shown in FIGS. Omit it.

The disk cartridge 1 according to the present invention has a hook-shaped engaging piece 8 provided on the tip 6a of the shutter 6 as a structure for preventing the tip 6a of the shutter 6 from floating. Is slidably engaged with a guide slot 9 formed in the cartridge body 2. The guide groove 9 is formed long in the sliding direction of the shutter 6 at a position hidden by the shutter 6 when the shutter 6 is closed, and accordingly, the engaging piece portion 8 is opened toward the center (opening) when the shutter 6 is opened. It is projected on the side edge which becomes the parts 4 and 5 side).

In the disc cartridge 1 of the present embodiment having the above-described configuration, the shutter 6 is opened in a state in which the engagement of the engaging piece portion 8 and the guide groove hole 9 reliably prevents the tip portion 6a from rising. The parts 4 and 5 are slid to open and close. Since the guide groove 9 is hidden by the shutter 6 when the shutter 6 is closed, dust does not enter the inside of the cartridge body 2 through the guide groove 9.

Further, in the disk cartridge 1 of this example, the circular opening 4 at the center of the cartridge body 2 and the guide groove hole 9 are communicated with each other by the through groove 10. The through groove 10 has a width that allows the engaging piece portion 8 to sufficiently pass therethrough, so that when the shutter 6 is assembled, the engaging piece portion 8 is inserted from the circular opening 4 through the through groove 10 into the guide groove hole 9. It can be easily inserted into and engaged with.

[0012]

[Effect of the device]

 As is clear from the above description, the disk cartridge of the present invention has a simple structure in which the engaging piece portion and the guide groove hole are engaged with each other without using a pressing plate as in the conventional case, so that the tip portion of the shutter is surely lifted. Since this is prevented, the number of parts and the number of assembling steps are reduced, and the cost can be reduced. Further, since the guide groove hole is hidden by the shutter when the shutter is closed, there is no risk of dust entering the cartridge body through the guide groove hole.

[Brief description of drawings]

FIG. 1 is a plan view of a disk cartridge of an embodiment,
Shows the shutter closed state, and B shows the shutter opened state.

FIG. 2 is a plan view of only the cartridge body of the disk cartridge of the embodiment.

FIG. 3 is an enlarged view of a main part of the disc cartridge of the embodiment.

FIG. 4 is a cross-sectional view of a main part of the disc cartridge of the embodiment.

FIG. 5 is a perspective view of a conventional disc cartridge.

FIG. 6 is a plan view of a conventional disc cartridge, in which A is a state where a shutter is opened and B is a state where the shutter is closed.

[Explanation of symbols]

 1 Disc Cartridge 2 Cartridge Body 3 Disc 4, 5 Opening 6 Shutter 8 Engaging Piece 9 Guide Groove

[Procedure amendment]

[Submission date] December 16, 1992

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

Claims (1)

[Scope of utility model registration request] 1. A disc cartridge in which a cartridge body in which a disc is rotatably housed has an opening for exposing a part of the disc, and a shutter for opening and closing the opening is slidably mounted. A hook-shaped engagement piece is provided at the tip of the shutter, and a guide groove hole is slidably engaged with the cartridge body at a position hidden by the shutter when the shutter is closed. A formed disc cartridge.