JPH051017Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field to which the invention pertains The invention relates to a disk case, and in particular, it is possible to keep a rotatably disposed disk inside the casing always biased to one side when it is not in operation and forcibly release it when it is in operation. Regarding the disk case.

BACKGROUND OF THE INVENTION Conventionally, floppy disk cartridges have been known in which a flexible magnetic disk or the like is rotatably housed within the cartridge. It is known that such a cartridge is provided with a pick-up through hole that faces a pick-up such as a head for reading or recording signals from a floppy disk housed in the cartridge.

In order to prevent dust from entering the cartridge through such a pick-up hole, a cartridge whose pick-up hole is covered during non-operation is disclosed in Japanese Patent Laid-Open No. 57-210486.

However, if only the pick-up hole is shielded, dust will enter through the central hole provided in the center of the cartridge to rotate the disk, so there is a problem that it is not very useful to shield only the pick-up hole from dust. It was hot.

In order to solve these problems, the present applicant previously proposed a disk case shown in FIGS. 1 to 3. This will be explained below.

Figure 1 is an exploded perspective view of a conventional disk case.
FIG. 2 is a side sectional view of the disk case set in the playback device, and FIG. 3 is a side sectional view of the disk case showing a non-operating state in which the disk case is not set in the playback device.

In FIG. 1, 4 is a disk such as a digital audio disk or a magnetic disk, and the disk 4 is clamped by the upper clamper 3 and the lower clamper 5 around the center hole 4a of the disk, and the disk 4 is clamped to the upper clamper 5. For example, a circular magnet 2 is fixed. The magnet 2 is magnetized in the thickness direction as shown. The lower clamper 5 has a flange 5a extending downward, and the flange 5a is rotatably fitted into a central through hole 9 bored in the lower disk case 7. Reference numeral 8 denotes a pick-up hole for picking up disc information or recording signals on the disc. A magnet 1 magnetized so as to repel the magnet 2 is fixed to the upper inner surface of the upper disk case 6 at a position facing the magnet 2.

In Fig. 2, which shows such a disc 4 rotatably attached to the disc cases 6 and 7 and set in the playback device, both sides of the disc case are attached to the guide frame 11 of the U-shaped loading mechanism. When the magnet 1 is guided to be inserted and loaded into a predetermined position, the center spindle 10 is fitted into the counterbore 5b provided in the collar 5a of the lower clamper 5 through the central through hole 9 of the disk case, and the magnet 1 is inserted into the magnet 1. , 2 is pressed toward the center spindle 10 side.

That is, with this configuration, there is no need to operate the clamper mechanism after the disk is fitted onto the center spindle 10 as usual, and the disk can be loaded and played.
In the recording state, the disc is clamped by a pressing member (magnets 1 and 2) inside the disc case.

Furthermore, when the disc case is removed from the playback device, the repulsive force of the magnets 1 and 2 presses the lower clamper 5 so as to close the lower center hole 9, as shown in FIG. The disk is held within the center without rotating and has the effect of preventing dust from entering through the central through hole 9.

However, with the above configuration, the total thickness of the upper and lower cases increases due to the placement of the upper and lower clampers and two magnets inside the casing, which makes it impossible to achieve a compact configuration. When centering the holding member, there was a problem in that the entire case had to be moved left and right, front and back, because it could not be operated externally.

Purpose of the invention The present invention was made in view of the above-mentioned drawbacks, and the object of the present invention is to provide a disc case that is extremely thin and that can also be operated externally during centering.

Summary of the invention According to the invention, the above object is to provide a central through hole for protruding a disk holding member, and a radial direction of the disk for picking up information recorded on a disk placed on the disk holding member. A pick-up hole is provided on one side of the casing, and a magnet is disposed in a magnet holding portion that closes the hole formed on the other side of the casing, and the disk is attached to the casing. When the disk is not in operation, the disk is fixed in the case by the magnet, and when the disk is in operation, the disk is forced to be rotatable by the disk holding member. This is achieved by providing a disk case that is characterized by being detachable.

Embodiment of the invention An embodiment of the invention will be described in detail below with reference to FIGS. 4 and 5. The same parts as in FIGS. 1 to 3 are given the same reference numerals, and redundant explanation will be omitted.

Figure 4A shows the disk case in the non-operating state.
Figure B shows a partial sectional view of the disk in an operating state, and Figure 5 is an enlarged view of the main part.

In FIGS. 4A and 4B and FIG. 5, a disk 4 is housed inside rectangular upper and lower cases 6 and 7 with the outer periphery as a guide. A cylindrical magnet 12 is magnetized with multiple poles on one side. 13 is magnet 1
This is a magnet holding part made of a circular plate fixed to the magnet 2. Reference numeral 14 denotes a disk part that is adhesively fixed to the magnetized surface of the magnet 12. Reference numeral 15 is a circular adsorption plate made of a magnetic material (SPCC, etc.) and is fixed to the lower case 7. 16 is a shutter which can be opened and closed by a mechanism (not shown) inside the upper and lower cases 6 and 7. 10 is a spindle, and 17 is a disk guide fixed on the spindle 10. 1
1 and 11 are guides for upper and lower cases 6 and 7, and 18
is the installation pace of the spindle motor 19 which also serves as a stopper for the upper and lower cases 6 and 7.

When the disc 4 is not mounted on the turntable 20, the disc 4 is fixed to the suction plate 15 fixed inside the upper and lower cases 6 and 7 by the magnet 12, as shown in FIG. , 7 to prevent scratches, dust, indexes, etc. from adhering. When the upper and lower cases 6 and 7 are lowered along the guides 11 and 11, the spindle 1 is inserted into the guide hole 21 of the magnet holding part 13.
0 is inserted, and the upper and lower cases 6,
When the disc 7 can no longer be lowered (the part that applies the lowering force is not shown), the disc 4 separates from the upper and lower cases 6 and 7, and the magnet 12 attracts the turntable 20 made of magnetic material to move the disc 4 onto the turntable 20. The disk 4 can be rotated within the upper and lower cases 6 and 7. Also, at this time, the shutter 16 is opened and the information on the disk 4 can be read out from section A by pickup.

Effects of the invention As mentioned above, this invention holds a magnet on the top side of the case so that it can slide freely in the vertical direction, and attracts it to the magnetic body provided on the bottom side via a disk, thereby reducing the thickness of the entire case. This makes it possible to prevent dust and the like from entering the information recording section through the center hole of the disk, and to easily insert and connect the rotation drive means.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional disk case.
Fig. 2 is a side sectional view of a conventional disc case set in a playback device, Fig. 3 is a side sectional view of the conventional disc case removed from the playback device in a non-playing state, and Fig. 4 is a side sectional view of the conventional disc case in a non-playing state. FIG. 5 is an enlarged side sectional view of the main part of FIG. 4. FIG. In the figure, 1, 2... Magnet, 3... Upper clamper, 4... Disc, 4a... Center hole, 5...
Lower clamper, 5a...Brim, 6...Upper case, 7...Lower case, 8...Pickup through hole, 9...Center through hole, 10...Spindle, 11
... Guide frame, 12 ... Magnet, 13 ... Magnet holding member, 14 ... Disc part, 15
... Suction plate, 16 ... Shutter, 17 ... Disc guide, 18 ... Guide guide, 19 ... Spindle motor, 21 ... Guide hole.

Claims (1)

[Scope of utility model registration request] A magnetic suction plate is provided on the circumference of the lower surface of the case, on the disk holding part that is vertically movably held in the upper hole of the case that stores the disk and abuts against the center circumference of the disk. A magnet is provided between the turntable and the disc holding portion to attract the disc through the disc, and when a turntable having a magnetic material is inserted through the through hole on the lower side of the case, the disc is attracted between the turntable and the disc holding portion through the disc. A disk case that rotatably holds the .