JPS58212665A - Disc cartridge - Google Patents

Abstract

PURPOSE:To reduce the moving distance of a shutter and to open/close a hole precisely, by horizontally moving a sliding member engaged with opening member prepared on the side of a recording and reproducing device so that shutter member open/close the hole. CONSTITUTION:Sliders 8a, 8b are movably fitted to guide bars 6a, 6b through the holes 9a, 9b. A pair of shutters 10A, 10A' and 10B, 10B' are fitted to respective sliders 8a, 8b from up and down through pins 12 and respective shutters are horizontally moved together with the sliders 8a, 8b to open/close both turning holes 3, 3' and recording and reproducing holes 4, 4' formed on a cover. The end part 13 of each shutter is engaged with a guide 14 formed on the surface part of the cover. The sliders 8a, 8b are excited to the center each other by springs 11a, 11b and, at normal time, the shutters close the turning holes 3, 3' and the recording and reproducing holes 4, 4'.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention The present invention relates to a cartridge for accommodating a high-density recording recombinant disk such as a video disk, a PCM disk, or a digital optical disk.

Conventional technology High-density recording/reproducing discs are used by being stored in cartridges to protect their surfaces from scratches, dust, etc.
Delicious. However, in cartridges where the disk is attached to the recording/playback device along with the cartridge, and the disk is rotated within the cartridge for recording and playback, the cover provided for driving the disk and facing the recording/playback head is The dimensions of the hole are larger compared to the dimensions of the cartridge. For this reason, a shutter mechanism is installed that automatically opens the hole in the cover when the cover is attached to the recording/playback device, and closes the hole when the cover is not attached to prevent dust from entering through the hole and scratches. was difficult.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a disk cartridge that protects the disk from dust and scratches when not mounted, and that allows rotation of the disk and recording/reproduction when mounted.

Another object of the present invention is to provide a disk cartridge in which the distance of movement of the shutter is small and the hole can be opened and closed reliably.

In order to achieve the above object, the present invention provides at least one hole in the cover and member containing the disc, so that when the disc is loaded into a recording/reproducing device, the disc is driven and information is input/output through the hole. In the disc cartridge, a pair of slide members movable left and right provided on the cover member, a pair of shutter members movable left and right in conjunction with the slide members, and a pair of shutter members provided on the cover member that are movable left and right, and the slide members are always kept in a predetermined position. By providing a biasing member that is biased in the direction of t, when the recording/reproducing device is attached/detached, the slide member engages with the opening member provided on the recording/reproducing device side and moves from side to side, thereby causing the trap to become trapped. Therefore, the present invention is characterized in that the shutter member opens and closes the hole.

Embodiment of the invention゛ An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of a disk cartridge that is an embodiment of the present invention.

In the figure, the upper cover 1 and the lower cup (-1') are provided with holes 3, 5' for rotation of the decoder, and holes 4, 4' for access for recording and reproducing, respectively. is a disk which abuts the drive shaft and the member 2271 at the rotation holes 3 and 3', and is accessed by a recording/reproducing head at the holes 4 and 4' during rotation to record and reproduce signals.

6a and 6b are guide bars (-) fixed by recesses 7 provided in the upper cover 1 and the lower cover 2, and the guide bars 6a and 6b have sliders Ba and sliders Ba, respectively.
Bb is movably attached through holes 9a and 5+b. Sliders 6a and sb each have a pair of Schacter 1O
A, 1oA' and 1[IB, IOB' are attached from above and below by pins 12, and each shutter is connected to the slider s.
Move left and right with a and sb to rotate hole 3 on the cover.
．． 3' and the recording and reproducing holes 4 and 4' are opened and closed. The end portion 13 of each shutter engages with a guide 14 formed on the surface of the cover so that it does not separate from the cover during opening and closing operations.

In addition, y, 5ida Ba, Bb are springs 11a
, 11b mutually bias toward the center, so that the shutter normally closes the rotation holes 3, 3' and the recording/reproducing holes 4, 4'. When the shutter is in the closed state, the stoppers 158, 15b provided on the sliders 8a, 8b engage with the recesses 16 of the upper cover 1 and the lower cover 1', so that the closed state of the shutter is maintained. The position of the disk 5 is limited by the lip 17 and the presser foot 18 in terms of the internal pressure of the disk cartridge. That is, when the disc cartridge is not installed in the recording/reproducing device, the Dinuk 5 is fixed or slightly movable by the lip 17 and the presser foot 18, but when it is installed in the recording/reproducing device, the parts protruding from the outside of the cover. Since the presser foot 19 moves the presser foot 18 in the direction away from the disk, the disk 5 is in a state in which it can rotate within the disk cartridge without contacting other members. When the disc is removed from the recording/reproducing apparatus, the disc and parts 19 are in a free state, and the presser foot 1B is returned to its original position by the spring 21, thereby restricting the movement of the disc 5. Reference numeral 23 denotes a hole for detecting the state of the disk, and since this hole is opened and closed by a block 22 that is linked to the movement of the presser foot 18, it is detected whether the disk 5 is rotatable or not by detecting the open/closed state. As a method of detection, a photosensor may be used, or when positioning the disk by passing a bottle through the hole 23, it may be detected whether or not the bottle passes.

FIGS. 2(6) to 20 are partial cross-sectional views showing the movement of each part when the IJ lottery 50 of FIG. 1 is installed in a recording/reproducing apparatus.

24 is a recording/reproducing device frame, and this frame 24
A pair of guides 25 and opening members 26B and 26b that slide on each guide 25 are attached to the holder. The opening members 2611 and 26b each have a spring 27a.

27b is attached, normally in the position shown in Figure 2).

When inserted into the frame, the opening members 26a, 26b engage the sliders 8a, 8b, as shown in FIG. At this time, the stopper 15 of each slider is pushed by the opening members 26a, 26b and released from the recess 16 of the cover.

When the disk cartridge is further inserted, the release member 26
a, 261) move along the guides 25a, 25bK, and the sliders 8a, 8b follow this, so the shutters 10A, 10B, 10A', 10B' are widened to the left and right, respectively.

When most of the cartridge 500 is inserted into the frame, the parts 19 engage with the protrusions 28 provided at both ends of the frame, as shown in FIG. 2, and move the presser foot 18. As a result, the disk 5 becomes rotatable and the hole 23 becomes "open", and completion of loading is detected.

Effects of the Invention As is clear from the above explanation (According to the present invention, when a cartridge is loaded, a pair of shutters are automatically opened along the guide provided on the cartridge, and these shutters are opened when the cartridge is pulled out. Since it closes automatically, the disc inside the cartridge can be protected from dust and scratches.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a disk cartridge that is an embodiment of the present invention, and Figs. FIG. 1... Upper cover 1'... Lower cover 3... For disk rotation, hole 4... Hole for recording and playback 5... Disk 6... Guide bar 8... Slider 1oA, IOB... shutter

Claims (1)

[Claims] 1. A disc cartridge in which at least one hole is provided in the cover member containing the disc, and when a recording and reproducing device@lfc is loaded, the disc is driven and information is input and output through the hole. , a pair of slide members provided on the cover member that are movable left and right; a pair of shutter members that move left and right in conjunction with the slide members; and a constant biasing of the slide members in a predetermined direction. It is equipped with a biasing member that keeps
A disk cartridge characterized in that the slide member moves left and right by engaging with an opening member provided on the recording/reproducing device side, thereby causing the shutter member to flip and close the hole.