JPH0543358U - Hikari Disk Cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent ejection failure due to the tip of the shutter opening arm of the disk drive device being caught in the shutter sensor notch of the optical disk cartridge. [Structure] The side edge 7a of the shutter sensor notch 7 is inclined so as to open outward. Further, the same side edge is made of a material having a smaller dynamic friction coefficient than polycarbonate. [Effect] The tip of the arm easily comes off the shutter sensor notch, and ejection failure is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an optical disk cartridge for storing an optical disk such as a CD-ROM, a write-once optical disk and a rewritable optical disk.

[0002]

[Prior Art]

 FIG. 5 shows a general optical disk cartridge, 1 is an optical disk cartridge having a structure in which two shells are attached to the front and back, 2 is an opening, 3 is an optical disk housed in the cartridge 1, and 4 is a cartridge. A slider 5 slidably supported on the edge of 1 is a shutter attached to the slider 4 to cover the opening 2. As is well known, when the optical disk cartridge 1 is loaded into a disk drive device (not shown), the slider 4 is pushed by the shutter opening arm 6 provided in the device as shown in FIG. Then, the shutter 5 starts to open, and the opening operation is completed by fitting the tip of the arm 6 into the shutter sensor notch 7 formed near the edge of the opening 2 as shown in FIG.

During unloading from the disc drive device, the optical disc cartridge 1 is pushed out by a spring provided in the drive device for pushing out, and the tip of the arm 6 comes out from the shutter sensor notch 7 and is attached to the cartridge. The slider 4 is pushed back by the spring provided, and the optical disc cartridge 1 is ejected from the drive device with the opening 2 closed by the shutter 5. However, if there is something wrong with the unloading mechanism, such as the push-out spring of the drive device is weakened, or the notch 7 is deformed due to repeated attachment / detachment to / from the drive device, the arm 6 will not move. Sometimes the tip was caught in the shutter sensor notch 7 and an ejection failure occurred.

[0004]

[Disclosure of Problems to be Solved by the Invention] This invention has been made in consideration of such a problem, and has been made as a subject to eliminate an ejection failure due to the tip of the shutter opening arm being caught in the notch of the shutter sensor. is there.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, in the first invention, the side edge of the shutter sensor notch on the shutter closing direction side is inclined so as to open outward. In the second invention, the side edge of the shutter sensor notch on the shutter closing direction side is made of a material having a smaller dynamic friction coefficient than polycarbonate.

[0006]

[Action]

 Since the side edge of the shutter sensor notch is inclined so that it opens outward, the tip of the shutter opening arm is not constrained by the shutter sensor notch, but easily disengages from the notch, and ejection defects do not occur. Also, if the side edge of the shutter sensor notch is made of a material with a smaller dynamic friction coefficient than polycarbonate, which has been conventionally used as a constituent material of shells, the tip of the shutter opening arm should be attached to the shutter sensor notch. It becomes slippery and slips easily from the notch so that ejection failure does not occur.

[0007]

【Example】

 Next, the illustrated embodiment will be described. FIG. 1 shows an embodiment of the first invention, in which the shutter sensor notch 7 formed on the optical disk cartridge 1 is on the shutter closing direction side, that is, the side edge 7a on the right side of the figure is a line Y perpendicular to the cartridge edge. Tilted at an angle α. Therefore, even if the shell material of the optical disk cartridge 1 is the same as the conventional polycarbonate, the tip 6a of the arm 6 is not constrained in the state of being fitted into the shutter sensor notch 7, and contact with the tip 6a etc. The notch 7 is less likely to be worn and deformed due to, and the tip 6a of the arm 6 is not caught by the notch 7 at the time of unloading to cause ejection failure.

FIG. 2 shows the occurrence rates of ejection failure when the ejection angle is repeated by changing the inclination angle α of the side edge 7a, and the conventional α = 0 ° and α = 4 °, 5 °. And the results for 45 ° are shown. As is clear from this figure, if the angle α is 5 ° or more, the occurrence rate becomes zero even after 50,000 times, and it is not necessary to make the inclination 45 ° or more due to the structure of the unloading mechanism. Therefore, it is considered appropriate to select the inclination angle α in the range of 5 ° to 45 °.

FIG. 3 shows an embodiment of the second invention, in which the shutter sensor notch 7 on the shutter closing direction side, that is, the side edge 7b on the right side of the drawing is formed of a material having a smaller dynamic friction coefficient than polycarbonate. For this reason, the tip 6a of the arm 6 fitted in the shutter sensor notch 7 becomes slippery with respect to the side edge 7b, and the wear deformation of the notch 7 due to contact with the tip 6a is less likely to occur, so that the notch 7 is not easily deformed before unloading. The end 6a does not get caught in the notch 7 to cause ejection failure. The side edge 7b having a small dynamic friction coefficient can be formed, for example, by adhering it to the shell of the optical disk cartridge 1 or by integrally molding with the shell.

FIG. 4 shows the occurrence rate of ejection failure when the ejection is repeated by changing the material of the side edge 7b, and the entire shell is made of polycarbonate (dynamic friction coefficient = 0 without considering the dynamic friction coefficient). .45) and a side edge 7b made of polypropylene (dynamic friction coefficient = 0.37), polyacetal (dynamic friction coefficient = 0.18) and polyethylene (dynamic friction coefficient = 0.13). It shows the results for the thing. As is clear from this figure, polycarbonate with a dynamic friction coefficient of 0.45 shows a very high rate of 9.5% after 50,000 times, but polypropylene with a coefficient of 0.37 has a practically acceptable value of 2 It is 0.0%, and is zero in other examples where the coefficient is smaller. For this reason, it is desirable that the dynamic friction coefficient be about 0.37 or less, and polypropylene or a material having a dynamic friction coefficient of about 0.37 equivalent thereto or a material having a smaller dynamic friction coefficient than that is used for the side edge 7b. Considered appropriate.

[0011]

[Effect of the device]

 As is apparent from the above-described embodiment, the first invention is one in which the side edge of the shutter sensor notch of the optical disk cartridge is inclined so as to open outward. Therefore, the tip of the shutter opening arm is less likely to be constrained by the shutter sensor notch, and even if the unloading mechanism has a weak spring, the arm tip can be easily removed from the shutter sensor notch. Therefore, the ejection failure is prevented. In the second invention, the side edge of the shutter sensor notch is made of a material having a smaller dynamic friction coefficient than that of polycarbonate used as a constituent material of the conventional shell. Therefore, the tip of the shutter opening arm becomes slippery with respect to the shutter sensor notch and easily comes off the notch, which prevents ejection failure.

[Brief description of drawings]

FIG. 1 is a plan view and an enlarged plan view of a main part of an embodiment of a first device.

FIG. 2 is a diagram showing a comparison between the same example and a conventional example.

FIG. 3 is a plan view and an enlarged plan view of a main part of an embodiment of the second invention.

FIG. 4 is a diagram showing a comparison between the same example and a conventional example.

FIG. 5 is a plan view of a conventional optical disc cartridge.

[Explanation of symbols]

 1 Optical Disk Cartridge 2 Opening 5 Shutter 6 Shutter Opening Arm 6a Tip 7 Shutter Sensor Notch 7a, 7b Side Edge of Notch

Claims (2)

[Scope of utility model registration request] 1. An optical disk cartridge having a shutter sensor notch into which a tip of a shutter opening arm of a disk drive device is fitted, wherein a side edge of the shutter sensor notch on the shutter closing direction side is inclined so as to open outward. An optical disc cartridge characterized by: 2. An optical disk cartridge having a shutter sensor notch into which a tip of a shutter opening arm of a disk drive device fits, wherein a side edge of the shutter sensor notch on a shutter closing direction side is made of a material having a smaller dynamic friction coefficient than polycarbonate. An optical disk cartridge characterized by being configured.