JPH0643881U - Disc cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] Preventing the opening of the V-shaped notch provided on the disk cartridge and improving the releasability. [Structure] A disk-shaped medium is rotatably accommodated in a case 2 composed of an upper case and a lower case provided with a window part 3, and a shutter for opening and closing the window part is slidably provided in the case 2. a disc cartridge opened and closed pin is provided with a V-shaped notch 11 of the lock in contact with the case front side surface of the near periphery of the V-shaped notch 11 and thin plate thickness t _2, and V-shaped Notch 11
By forming the corner portions of the curved surface 13 on the curved surface 13, it is possible to prevent the opening phenomenon of the V-shaped notch portion in the disc cartridge, improve the releasability, and greatly improve the quality and the productivity. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disc cartridge in which a disc-shaped medium such as a flexible disc or a hard disc is rotatably housed in a case.

[0002]

[Prior art]

 Generally, a flexible disk or a hard disk as an information recording carrier is easily scratched, and dust or dust is easily generated, so that it is handled as a disk cartridge housed in a case with a shutter and easily set by a recording / playback device. It is configured. Conventionally, in this type of disc cartridge, an upper case and a lower case are separately formed, and a disc-shaped medium is housed inside to fuse the upper case and the lower case together. When the shutter is opened, the shutter on the case slides in the opening direction with the operation pin, but the shutter opening / closing operation pin abuts on the front side of the case to keep the window part of the case open. A V-shaped notch for locking is formed.

[0003]

[Problems to be solved by the device]

However, in this disc cartridge, as shown in FIG. 5, a rib e thicker than the plate thickness t of the case c is provided in the vicinity of the V-shaped notch portion d provided on the front side surface of the case c with which the shutter operation pin abuts. consists slightly thinner thicker than the plate thickness t plate thickness t ₁ Tokyo than rib e, the re-entrant portion f of the V-shaped notch d have angular, because it is molded have been position gate g more in the vicinity of the recess When the upper and lower cases are fused at both corners, the V-shaped notch part located away from the welded part will open the mouth and drop due to the infiltration of dust. This is a problem because recording and reproduction such as out of the product impedes recording and reproduction, resulting in poor quality and poor releasability during molding. The present invention is intended to eliminate these conventional drawbacks, prevents the opening phenomenon of the V-shaped notch portion in the disk cartridge, and also improves the mold release property, which greatly improves the quality and productivity. It is an object of the present invention to provide a disk cartridge which has a simple structure and can be formed at a low cost.

[0004]

[Means for Solving the Problems]

 According to the present invention, a disk-shaped medium is rotatably housed in a case consisting of an upper case and a lower case provided with a window section, and a shutter for opening and closing the window section is slidably mounted on the case. In a disk cartridge having a V-shaped notch for locking on the front side of the case with which the opening / closing operation pin comes into contact, the periphery of the V-shaped notch is thin and the corner of the V-shaped notch is formed into a curved surface. It is a disk cartridge characterized by the following.

[0005]

[Action]

 When the disk cartridge is loaded and set in the hard side, the shutter on the case is slid in the opening direction by the operation pin, the operation pin is fitted into the V-shaped notch, and the window part provided on the case is in the open state. When the disc cartridge is taken out, the cartridge is ejected from the hard side and handled if the operating pin is operated to remove it from the V-shaped notch. Since it is thinner than the case thickness, there is no opening of the V-shaped notch, it can be used safely, and the mold releasability at the time of molding is also improved, thus increasing productivity.

[0006]

【Example】

1 to 4, an embodiment of the present invention will be described. A disk-shaped medium 1 is rotatably accommodated in a case 2 composed of an upper case and a lower case provided with a window part 3, and the window part 3 described above is used. A disc cartridge having a shutter (4) for opening and closing the case slidably on the case (2), and a V-shaped notch (11) for locking on the front side of the case with which the opening / closing operation pin of the shutter (4) abuts. The peripheral portion 12 in the vicinity of the portion 11 has a thin wall thickness t ₂ smaller than the plate thickness t of the case 2, and the corners of the V-shaped notch portion 11 are formed into a curved surface 13 with an arm. And a rib 14 thicker than the plate thickness t of the V-shaped notch portion 11 and integrally formed by the gate 15 in the vicinity of the concave portion of the V-shaped notch portion 11.

In this case, as the V-shaped notch portion 11, the corner portion of the concave portion is formed into a curved surface 13 and the surface roughness of the concave portion surface is set to R _Z 0.3 μm or less. Care is taken to help prevent it. Further, the shutter 4 has a substantially U-shaped cross section, and a window hole 5 is formed on the shutter plate. The shutter 4 is slidably fitted in the shutter slide area 6 so as to match the window portion 3.

In the figure, 7 is a liner, 8 is a disc hub fitting hole, 9 is a medium housing portion, 10 is a disc hub, 16 is a label area, and 17 is a case welding boss.

[0009]

[Effect of device]

 According to the present invention, a disk-shaped medium is rotatably housed in a case consisting of an upper case and a lower case provided with a window section, and a shutter for opening and closing the window section is slidably mounted on the case. In a disk cartridge having a V-shaped notch for locking on the front side of the case with which the opening / closing operation pin comes into contact, the periphery of the V-shaped notch is thin and the corner of the V-shaped notch is formed into a curved surface. As a result, it is possible to prevent the opening phenomenon of the V-shaped notch in the disc cartridge, improve the releasability, greatly improve quality and productivity, and facilitate mass production. Has the practical effect.

[Brief description of drawings]

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

2 shows the upper case of FIG. 1, A is a plan view showing the inner surface, and B is an enlarged vertical sectional view taken along line aa.

FIG. 3 is a rear perspective view of the upper and lower cases of the example of FIG. 1 in a combined state.

FIG. 4 is an enlarged perspective view of a portion X in FIG.

FIG. 5 shows an upper case of a conventional example, where A is a plan view and B is b.
It is an expanded longitudinal cross-sectional view in the line -b.

[Explanation of symbols]

 1 Disk Medium 2 Case 3 Window 4 Shutter 11 V-shaped Notch 12 Peripheral 13 Curved Surface 14 Rib 15 Gate

Claims (2)

[Scope of utility model registration request] 1. A disk-shaped medium is rotatably housed in a case consisting of an upper case and a lower case provided with a window section, and a shutter for opening and closing the window section is slidably provided in the case. In a disk cartridge having a V-shaped notch for locking on the front side of the case with which the opening / closing operation pin abuts, the periphery of the V-shaped notch is thin and the corner of the V-shaped notch is formed into a curved surface. Disk cartridge to do. 2. The V-shaped notch portion has a surface roughness R _Z 0.
The disc cartridge according to claim 1, wherein the disc cartridge has a thickness of 3 μm or less.