JPH0253277A - Disk cartridge - Google Patents

Abstract

PURPOSE:To eliminate the play of a disk in a cartridge when it is not used by providing a recording medium abutting part abutted with a recording medium to hold at a shielding position and to release abutting at an exposed position on a shutter. CONSTITUTION:When the shutter 3 shields a read/write hole 2a and a driving hole 2b, it is held at the shielding position by the pressing force of a spring 4, and a disk hub 1a is sandwiched between semilunar shape abutting parts 3c and 3d on the shutter 3 receiving the pressing force in the diameter direction of the disk 1 and the end face 2d of the driving hole 2b, and also, it is sandwiched in a thickness direction between opposite abutting planes 3a and 3b of the shutter 3. When the shutter 3 is cleared from the read/write hole 2a and the driving hole 2b, the disk 1 and the disk hub 1a are opened in the diameter direction and the thickness direction, then, the disk 1 can rotate smoothly. In such a way, it is possible to prevent the play of the disk 1 in the cartridge 2 from being generated when it is not used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge that houses a disk-shaped information recording medium such as a magnetic disk, an optical disk, or a magneto-optical disk.

[Conventional technology]

Magnetic disks and optical disks used as information storage (recording) media in computers, word processors, audio, visual equipment, etc. are generally susceptible to damage such as scratches, dust, etc.
It must be protected from adhesion of dust, etc. In other words, these information recording media are often used while being housed in a disk cartridge, which is a storage body.

In addition, the disk cartridge has a drive hole in the center of both sides or at least one side for inserting a ninth disk rotation drive mechanism that drives the disk full rotation, and a hole for writing and reading information extending in the radial direction of the disk. A shutter is provided that is movable between a shielding position and an exposing position to open and close the opening.

[Problem to be solved by the invention]

However, in the conventional example as described above, in order not to disturb the smooth rotation of the disk during recording and reproduction of information, when the disk cartridge is installed in the device, there is a gap in the thickness direction of the disk between the disk and the inner surface of the disk cartridge. , and a diametrical gap.

Therefore, this gap causes the disc inside the cartridge to rattle when not in use, and the disc housed inside can be damaged or damaged due to vibrations caused when the cartridge is inserted or removed or carried around. It had some problems.

〔the purpose〕

The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to eliminate the rattling of the disk inside the cartridge when not in use, and to prevent the disk from shaking when recording, reproducing, and/or erasing information. An object of the present invention is to provide a disk cartridge having a structure that allows for smooth rotation of the disk by creating an appropriate gap in the thickness direction and/or diameter direction of the disk and the inner surface of the disk cartridge housing the disk.

[A precautionary measure to solve the problem]

According to the present invention, the above object is to provide a cartridge body having an opening for accommodating a disc-shaped recording medium and exposing a portion of the recording medium to the outside, and a position for shielding the opening from the pressure of the cartridge body. and a shutter movably mounted between the opening portion t and the exposing position, the shutter being brought into contact with the recording medium in the shielding position for holding the recording medium, This is achieved by a disk cartridge characterized in that it is provided with a recording medium abutting portion that is released from contact at an exposed position.

〔Example〕

Hereinafter, the present invention will be explained in detail based on the drawings which are examples of the present invention.
) is a diagram showing a first embodiment of the invention, and FIG.
) is a plan view showing the state Bk when the shutter 3 is in the shielding position, and FIG. 1(b) is a plan view showing the state Bk in FIG. 1(&).
It is a sectional view taken along line A, and FIG.
b) is a sectional view taken along line A-A in FIG. 2(a).

In the figure, numeral 1 indicates a disk which is an information recording medium. The disk has a disk shape, and has a disk hub 1a at its center that is rechucked by a spindle or the like in a disk drive device to rotate the disk. Reference numeral 2 denotes a rectangular cartridge body that houses the disk 1 therein, and the cartridge body 2 has a rectangular write/read hole 2 and a metal hole that exposes a part of the disk 1 for writing/reading. ing.

The cartridge body 2 has two positioning holes 2C as shown in the figure for positioning the cartridge body when loading it into a disk drive device.

Furthermore, the cartridge main body 2 has a circular drive hole 2b provided to expose the disc bald part 1a provided on the disc 1.

3 slides left and right in FIG. 1(a) to open the write/read hole 2
and a shutter that shields and exposes the drive hole 2b.

The shutter is biased in the direction of shielding the holes 2a m 2b (to the right in the figure) by a spring 4 whose both ends are rotatably engaged with the cartridge body 2 and the shutter 3. .

As mentioned above, FIGS. 1(a) and 1(b) show a state in which the shutter 3 is in a position to shield the writing/reading hole 21L and the drive hole 2bf, and the biasing force of the spring 4 is applied as shown in the figure. It is held in a shielded position. In addition, in this state, the disk 11 fixed to the disk 1a is connected to the half-moon-shaped contact portion 3e@3d of the shutter 3, which is biased in the diametrical direction of the disk, and the end surface 2d of the drive hole 2b. is held in between. The mirror shutter 3 has a space in the thickness direction of the disc that is approximately equal to the thickness of the disc knob 1&, and the disc knob 3 has a space that is approximately equal to the thickness of the disc knob 1&.
It is held between & and 3b. Thus disk 1
is held in the disk housing space of the cartridge body 2 without wobbling.

The shutter 3 can be moved by applying a force that exceeds the biasing force of the spring 4 in the direction of the exposure position (ie, from right to left in FIG. 1(a)).

FIG. 2 (&) I (b) shows a state where the shutter 3 is in a position exposing the writing/reading hole 2& and the driving hole 2b,
The shutter 3 is held against the urging force of the spring 4 by a locking mechanism (not shown). Further, in this state, the disk 1 and the disk hub 1a are open in the diameter direction of the disk and the thickness direction of the disk, and have a degree of freedom. Therefore, even when the cartridge body 2 is loaded into a drive device, if the cartridge body 2 is held at an appropriate position relative to the disk 1, there will be an appropriate distance between the disk 1 and the inner surface of the cartridge body 2 in the thickness direction and the diameter direction. A clearance can be obtained, so that the disk 1 can rotate smoothly.

When the disk is placed in a predetermined position in the cartridge and the holding force of a locking mechanism (not shown) is removed, the shutter 3 returns to the state shown in FIG. 1 due to the biasing force of the spring 4.

3 and 4 are diagrams showing a second embodiment of the present invention, FIG. 3 is a plan view showing the state when the shutter 13 is in the cover position, and FIG. FIG. 3 is a plan view showing a state when the is in an exposed position. The embodiment shown in FIGS. 3 and 4 is an example in which the disk 1 is clamped only in the diametrical direction.

In the following figures, members having the same functions as those shown in FIGS. 1 and 2 will be designated by the same reference numerals, and their explanations will be omitted.

As mentioned above, in Figure 3, the printer 13 has a writing/reading hole of 2 m,
It is shown in a state where it is in a position where it covers the drive hole 2bifi, and is held in the shielding position by the biasing force of the spring 4 as shown in the figure. In this state, the disk hub 1&, which is fixed to the disk IK, receives a biasing force in the diametrical direction of the 7'' disk. The disc 1 is held between the disc 1 and the end face 2d of the hole 2b.In this way, the disc 1 is held in the disc accommodating space of the cartridge body 2 without wobbling in the diametrical direction of the disc 1.

The shutter 13 can be moved by applying a force K exceeding the urging force of the spring 4 in the direction of the exposure position (ie, from right to left in FIG. 3) by means not shown.

In FIG. 4, the shutter 13 is connected to the write/read hole 2a and the drive hole 2.
In the fully illustrated state in which part b is exposed, the natter 13 is held against the biasing force of the spring 4 by a locking mechanism (not shown). Further, in this state, the disk 1 and the disk hub taFi disk are opened in the diameter direction and the thickness direction of the disk, and have a degree of freedom. Therefore, when loading the drive device (in case J), if the cartridge body 2 is held in an appropriate position relative to the disk 1, there will be an appropriate gap between the disk 1 and the inner surface of the cartridge body 2 in the thickness direction and the diameter direction. This enables smooth rotation of the shutter 1. When the shutter 13 is released from the holding force by the locking mechanism (not shown), the shutter 13 returns to the state shown in FIG. 3 due to the biasing force of the spring 4. 5 and 6 are views showing a third embodiment of the present invention, FIG. 5 is a plan view showing the state when the shutter 23 is in the shielding position, and FIG. 6 is a plan view showing the state when the shutter 23 is in the shielding position. 6 is a plan view showing the state in the exposed position. The embodiment shown in FIGS. 5 and 6 is an example in which the disk 1 is held only in the thickness direction of the disk 1. FIG.

As mentioned above, in FIG. 5, the shutter 23
and the driving hole 2b is shielded, and furthermore, in this state, the printer 23 holds the disc pulley 1a in the thickness direction of the disc in the same manner as in the first embodiment. There is. FIG. 6 is a diagram showing a state in which the shutter 23 exposes the write/read hole 2a and the drive hole 2b. In this state, the disk nozzle 1& is released from the sandwiched state by the shutter 23, and Therefore, the disk 1 has a degree of freedom not only in the diameter direction of the disk but also in the thickness direction of the disk.

7 and 8 are diagrams showing a fourth embodiment of the present invention, and FIG. 7 is a plan view showing the state when the shutter 33 is in a position for writing, reading, and shielding the drive hole 38ft. , FIG. 8 is a plan view showing the state when the shutter 33 is in the exposure position.

Incidentally, FIGS. 7 and 8 are examples in which the disk is held in the diameter direction and the thickness direction of the disk.

As shown in FIG. 7, the lock link 35 attached to the cartridge body 2 and urged to rotate counterclockwise by the spring 34 is engaged with the lock pawl 33h fixed to the shutter 33. The shutter 33 is held in the illustrated shielding position. The disc 1 is held between an elastic member 36 fixedly provided within the disc housing space of the cartridge body 2 and a holding claw 33a which is an elastic member provided on the shutter 33, and the friction between these elastic members is The resistance holds the disk in place in the diametrical and thickness directions of the disk.

FIG. 8 is a diagram showing a state in which the shutter 33 exposes the writing/reading/driving hole 38, as described above.
3 is held by a locking mechanism (not shown) against the biasing force of a spring 4. Further, in this state, the disk 1 is open in the disk diameter direction and thickness direction, and has a degree of freedom.

〔Effect of the invention〕

As described in detail above, according to the present invention, the disk in the cartridge can be rotated by moving the shutter to the exposed position when the cartridge is installed in the drive device, and the shutter can be rotated when the cartridge is removed from the drive device. The disk in the cartridge is held fixed by moving the disk to the shielding position.

This not only prevents damage or breakage of the disk due to vibrations or rattling when it is attached to or removed from the drive device or when carried, but also when the disk cartridge is stored in a machine or carried. It is possible to eliminate rattling noise caused by disc vibration.

[Brief explanation of the drawing]

FIG. 1(m) is a plan view of the first embodiment of the present invention showing the state when the shutter is in the closed position trap, and FIG. 1(b) is a cross section taken along line A-A in FIG. 1(a). 2(&) is a plan view of the first embodiment of the present invention showing the state when the shutter is in the exposure position, and FIG. 2(b) is the line A-A in FIG. 2(&). 3 and 4 are plan views showing a second embodiment of the present invention, and FIGS. 5 and 6 are plan views showing a third embodiment of the present invention, and FIGS. 7 and 4 are respectively plan views showing a third embodiment of the present invention. FIG. 8 is a plan view showing a fourth embodiment of the present invention. 1...Disc, 2...Cartridge body, 3...
・Shutter Figure 1 Agent Patent Attorney Johei Yamashita (b) Figure (G) (b) Figure Figure Figure Figure Figure Figure Figure

Claims (2)

[Claims] (1) A cartridge body that accommodates a disk-shaped recording medium and has an opening for exposing a part of the recording medium to the outside, a position in the cartridge body that shields the opening, and a position that exposes the opening. and a shutter movably mounted between the recording medium and the shutter position, the shutter being brought into contact with the recording medium in order to hold the recording medium in the shielding position, and released from the corresponding contact in the exposing position. What is claimed is: 1. A disc cartridge characterized in that a recording medium abutting portion is provided. (2) The disk cartridge according to claim (1), wherein the shutter is biased toward the shielding position by a spring.