JPS6324771U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the shutter lock mechanism of a disk cartridge according to the first embodiment of the present invention, Fig. 2 is a sectional view taken along the arrow - - of Fig. 1, and Fig. 3 is a second embodiment of the present invention. FIG. 4 is a plan view showing the main parts of the shutter lock mechanism of the disk cartridge of the present invention, FIG.
FIG. 6 is a plan view showing the main parts of the shutter lock mechanism of the disk cartridge according to the embodiment, FIG. 6 is a sectional view taken along the arrow - in FIG. 5, FIG. 7 is a perspective view showing the external appearance of the optical disk cartridge, and FIG. is shown in Figure 7.
9 is a plan view showing the shutter lock mechanism of a conventional optical disk cartridge. In the figure, 1 is a cartridge housing, 6 is an optical disk (disk), 7 and 8 are openings, and 9 is a plan view showing the shutter lock mechanism of a conventional optical disk cartridge. End face, 11
is a shutter return spring (first biasing means), 14
is a lock plate return spring (second biasing means), 15
21, 31, 41 are shutter opening/closing arms, 21, 31, 41 are shutters, 22 is a lock plate, 23, 32 are bent portions (protrusions), 24 is a hole (first engaging portion), 25 is an inclined surface, 26 is a recessed portion, 27 is a protrusion (second engagement part), 33 is a flange (first engagement part), 42 is a protrusion, and 43 is a protrusion (first engagement part).

Claims (1)

[Claims for Utility Model Registration] A cartridge housing having a writing and reading opening and housing a disk; and a cartridge housing that slides between an open position and a closed position along an end surface of one end of the cartridge housing. The cartridge case is configured such that it can be biased in the closing direction by a first biasing means, and when the cartridge housing is installed in the drive device, the cartridge housing is slid from the closed position in the open direction by engagement with the drive device. a shutter for opening the opening; and a second biasing means rotatably provided within the cartridge housing, the distal end of which is biased in one rotation direction toward the shutter, and the cartridge housing is mounted. and a lock plate which is rotated against the urging force of the second urging means prior to sliding of the shutter by engagement with the drive device side, and the lock plate includes the above-mentioned lock plate. a sloped surface that engages with a protrusion of the shutter that is activated by a first activation means to enable the shutter to slide in the closing direction; In the disk cartridge, the disk cartridge is provided with a projection and a recess that engages with a margin in the opening direction of the shutter and maintains this engaged state until the middle of the rotational movement of the lock plate at the time of mounting. a first engaging portion is provided on the protrusion, and the lock plate is configured to engage with the first engaging portion when the protrusion of the shutter in the closed position moves in the shutter opening direction within the recess. A shutter lock mechanism for a disk cartridge, characterized in that a second engaging portion is provided for locking rotation of a lock plate.