JPS6116081A - Shutter lock device of disk cartridge - Google Patents

Abstract

PURPOSE:To prevent the injury of a disk and to improve the reliability by shifting a shutter only when a cartridge is put into a recording/reproducing device. CONSTITUTION:When a disk cartridge 2 is put into a recording/reproducing device 24, a lever 20 is moved by a projection 25b. Then a hook state is released between a hook part 12 of a slider 9 and a lock pawl 16. Thus the slider 9 can be moved freely. When the cartridge 2 is inserted further, a projection 11 of the slider 9 touches the projection 25a to move a shutter 7. Thus a center hole 5 and an inserting hole 6 are exposed for execution of recording/reproduction of information. The above-mentioned procedure is reversed when the cartridge 2 is taken out of the device 24. Then the pawl 16 hooks the part 12 after the slider 9 is reset to its original state. Thus the shutter 7 is locked.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used, for example, in a recording/reproducing apparatus for recording video information or document information on a disk-shaped magnetic sheet or optical disk, or for reproducing recorded information. The present invention relates to a disc cartridge, and particularly relates to a disc cartridge equipped with a slider that allows a head insertion hole etc. to be opened and closed freely.

Conventional configuration and problems Conventionally, disk cartridges that rotatably house disks have been used to store flexible disc-shaped magnetic sheets inside cartridges made of synthetic resin, etc., and use them in magnetic recording and reproducing devices. Flexible cartridges for so-called floppy disks are known, which can be attached to a floppy disk to record and play back information, but because the opening for inserting the head is always open, the sheet can be accidentally damaged when handled. There are problems such as stains when the head is inserted, or fingerprints and dust from the outside air that adhere to the recording surface.Recently, cartridges with a shutter that allows the opening for inserting the head to be opened and closed have been introduced. It has been proposed and commercialized. However, even in this type of cartridge, when it is inserted into the device, the shutter automatically moves to open the opening for inserting the head. At that time, dust may enter through the open hole for inserting the bed and adhere to the recording surface, or accidentally leave fingerprints on the sheet. The present invention solves the above-mentioned problems and makes it possible to close the opening for inserting the head at all times except when inserting the head into the device. The present invention aims to provide a cartridge with a shutter to prevent dust from adhering to the recording medium and preventing damage to the recording medium, thereby providing a recording medium of good quality at all times.

Composition of the Invention The disk cartridge shutter lock device of the present invention includes a shutter movably attached to the cartridge housing, a slider that moves the shutter to open and close the head insertion hole and the center hole, and engages with the slider. A shutter locking device for a disk cartridge comprising an elastic member or the like that elastically biases the shutter in a direction to close the head insertion hole and the center hole when the shutter is pressed in the direction of closing the head insertion hole and the center hole, the slider being provided with an engaging portion for locking the shutter, The feature is that the slider itself is configured to lock.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is an external view of a disk cartridge incorporating a shutter lock device of the present invention, FIG. 2 is a perspective view showing an embodiment of the shutter lock device of the present invention, and FIG.
4 are top views showing the operating state of the device.

In FIG. 1, reference numeral 1 denotes a disk for recording information such as video information and document information, and a retaining hole 1a is formed in the center to engage with a drive section of a disk motor.

2 is a disk car (IJ) which rotatably stores the disk 1 therein, and as shown in FIG. It is structured approximately in the shape of a rectangular parallelepiped. Further, the upper half 3 and the lower half 4 have a center hole 6 into which the drive section of the disk motor described above is inserted, and a long hole-shaped head into which a head for recording or reproducing desired information can be inserted. The insertion holes 6 are provided to face each other, so that the disc 1 can be used even when the disc 1 is a double-sided disc.

If only a single-sided disk is used, the head insertion hole 6 may be provided in either the upper half 3 or the lower half 4.

Reference numeral 7 denotes a cone-shaped shutter that allows the center hole 5 and the head insertion hole 6 to be opened and closed, and is configured to be slidable on the outer peripheral surface of the disk cartridge 2. 8a,
8b is a protruding piece that engages with a slider to be described later. Reference numeral 9 denotes a slider 9 for moving the shutter 7 in the directions of arrows A and B, and as shown in FIG. 10a and 10b are formed, respectively. The slider 9 is constantly pulled by the elastic member 130 in the direction in which the 7-plane soter 7 closes the center hole 6 and the head insertion hole 6. Therefore,
Normally, as shown in FIG. 1, the shack 7 is placed in a position that closes the center hole 5 and the head insertion hole 6, thereby preventing dust and other particles from entering the disk cartridge 2 from outside. ing.

Reference numeral 14 denotes a guide groove for guiding the movement of the slider 9, which is provided in the upper half 3 and the lower half 4, respectively, and is formed in a substantially right-angled shape with arcuate corners as shown in FIG. There is. On the other hand, since the slider 9 is made of an elastic member such as a leaf spring or vinyl chloride, the slider 9 can be used as a guide even if a part of the guide groove 14 is formed in an arc shape. It is slidable along the groove 14. Reference numeral 11 denotes a protrusion integrally formed at one end of the slider, and as shown in FIG. It is designed to be viewed from the outside. The protrusion 11 engages with a protrusion provided in a recording/reproducing device, which will be described later, to move the slider 9 in the direction of arrow C, and at the same time moves the shutter 7, which engages with the position regulating holes 1oa and 1ob of the slider 9. This is to move it in the direction indicated by the arrow.

On the other hand, the other end of the slider 9 is provided with an engaging portion 12 for use in a seven-wheel drive according to the present invention. The engaging portion 12 is formed into an opening shape as shown in FIG. The claw portion 17 of the lock claw 16 is inserted into the engaging portion 12, and as shown in FIG. The shutter 7 is configured to be immovable in the direction indicated by the arrow. One end 17' of the claw portion 17 is formed substantially perpendicular to the longitudinal direction of the slider 9, and is configured to be difficult to disengage from the engagement portion 12. The lock pawl 16 is rotatable about a shaft 19 integrally formed with the lower barn 4 as a rotation fulcrum;
A pin 22 formed integrally with the lever 20 is inserted into the notch hole 18 formed at the other end, thereby restricting rotation. The lever 2o is configured to be slidable in the directions of arrows E and F, and is normally biased in the direction of arrow F by an elastic member 23 such as a compression spring, as shown in FIG. Further, the tip end 21 of the lever 20 is provided facing the opening 15a, and
The opening 15b is symmetrical to the opening 15b, and has inclined surfaces 21a and 21b.

Next, the operation of the shutter lock device of the present invention will be explained based on FIG.

When the disk cartridge 2 is inserted into the recording/reproducing device 24, a protrusion 25a that is provided inside the device sinks.

26b begins to enter into the openings 15a and 15b, respectively, and the inclined surface 21a of the lever 2o first comes into contact with the protrusion 25b. Furthermore, when the disk cartridge 2 is inserted,
The lever 20 is moved in the direction of arrow #JE by the protrusion 25b against the biasing force of the elastic member 23. The bin 22 provided on the lever 20 is moved in conjunction with the movement of the lever 20.
and the notch hole 18 of the lock claw 16 are engaged,
The lock pawl 16 begins to rotate in the direction of arrow 1 using the shaft 19 as a rotation fulcrum, and as shown in FIG. It comes off. At this time, the slider 9 becomes movable in the direction of arrow C for the first time, and the shutter 7 is also released from the locked state. Subsequently, when the disk cartridge 2 is inserted in the direction of arrow G, the protrusion 11 of the slider 9 comes into contact with the protrusion 25a, and the insertion of the protrusion 11 itself into the recording/reproducing device 24 is restricted. However, when the disc car 11 nozzle 2 is further inserted against the biasing force of the elastic member 13, the insertion is restricted by the protrusion 11 and the protrusion 25a, and as a result, the disc cartridge 2 is When the slider 9 moves in the direction of the arrow C, the shutter 7 begins to move in the direction of the arrow C in response. As the shutter 7 moves, the center hole 6 begins to be exposed to the outside, and then the head insertion hole 6 also begins to be exposed to the outside, and finally, as shown in FIG. The hole 6 is completely exposed to the outside. At this time, the drive unit of the disk motor can be inserted into the center hole 5 for the first time, the head can also be inserted into the head insertion hole, and the disk cartridge 2 (not shown) is installed in a predetermined position. Information is recorded and reproduced. On the other hand, the lock claw 16 is disengaged from the lever 2o and the protrusion 25b, and is returned to its original state by the restoring force of the elastic member 23, as shown in FIG.

When removing the disc cartridge 2 from the recording/reproducing device 24, the reverse operation is performed, and after the slider 9 returns to its original state as shown in FIG. The shutter 7 is locked by the engagement s12 of the slider a. Thereafter, the disc cartridge 2 is completely removed from the recording/reproducing device 24, but at this time the shutter 7 has already been moved to the lock claw 1.
Since the shutter 7 is locked by the shutter 6, even if an attempt is made to move the shutter 7 by holding the shutter 7, the shutter 7 remains in a state where the center hole 5 and the head insertion hole 6 are closed and does not move.

Effects of the Invention As is clear from the above explanation, according to the present invention, the shutter lock device is configured so that the shutter does not move unless the disk cartridge is inserted into the recording/reproducing device. Even if the shutter does not move while blocking the center hole and head insertion hole, there is no possibility of accidentally depositing fingerprints or dust on the disk surface, which prevents damage to the disk and improves reliability. Therefore, it is possible to provide a shutter lock device with high performance. In one embodiment of the present invention, the engaging portion of the slider is configured in the shape of an opening, but the same effect can be obtained even if the engaging portion is configured in the shape of a protrusion.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a disk cartridge incorporating a shutter lock device of the present invention, FIG. 2 is a perspective view of an embodiment of the same device, and FIG. 3 is a perspective view of the disc cartridge. FIG. 4 is a top view showing the operating state of the device. 1...Disc, 2...Disc cartridge, 5-...Center hole, 6...
・Head insertion hole, 7... Shutter, 9...
...Slider, 12...Engagement part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
figure

Claims (2)

[Claims] (1) A cartridge housing that rotatably houses a disk and is formed with a head insertion hole and a center hole;
a shutter movably attached to the cartridge housing; a slider that moves the shutter to freely open and close the head insertion hole and the center hole; and a slider that engages with the slider to open and close the head insertion hole and the center hole. 1. A shutter lock device for a disk cartridge comprising an elastic member resiliently biased in a closing direction, wherein the slider is provided with an engaging portion for locking the shutter. Device. (2) The shutter lock device for a disk cartridge according to claim 1, wherein the engaging portion of the slider is formed in the shape of an opening or a protrusion.