JPH0447806Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a disk cartridge having a plate-shaped pressing member that presses the disk downward so that the disk does not become loose inside the cartridge body when not in use.

[Summary of the invention] This invention is a disk cartridge in which a disk is rotatably housed in the cartridge body, and a center hole is formed in the upper half and the center, and one end corner is provided with a center hole for inserting a fixed release pin of a disk drive device. a cartridge body consisting of a lower half having an insertion hole, a disk rotatably housed in the cartridge body, and a shutter for opening and closing a disk exposure hole formed on the other end edge of the cartridge body; a plate-shaped pressing member having one end fixed to the inner surface of the upper half and pressing the center hub of the disk against the inner surface of the lower half by an elastic biasing force of the other end; and a midway portion of the pressing member at one end. and has an abutting part on the other end side with which the release pin inserted from the insertion hole of the lower half comes into contact, so that it can freely reciprocate along the inner surface of the upper half. and a release arm that moves the pressing member to release the pressing force toward the disk side when the release pin is inserted into the insertion hole of the lower half. During use, the center hub of the disk can be reliably locked by applying a stable disk pressing force to the pressing member without being affected by the bending deformation of the upper half, etc., thereby preventing the disk from moving wildly inside the cartridge body. This makes it possible to reliably prevent this.

[Prior Art] For example, when the disk is not in use, a plate-shaped pressing member is used to press the disk against the lower half of the cartridge body to prevent the disk from moving loosely within the cartridge body, while when the disk is loaded into a disk drive device, the disk drive A disk cartridge is known in which the pressing force of the pressing member against the disk is released by a movable release pin of the device. This will be explained in detail with reference to FIGS. 4 to 6. Reference numeral 1 indicates a disk cartridge. The cartridge body 2 of this disk cartridge 1 is
It is composed of a substantially square upper half 3 in the form of a synthetic resin plate, and a box-shaped lower half 4 made of synthetic resin with an open top that is butted against and fixed to the periphery of the upper half 3. A magnetic disk 5 is rotatably housed in a space formed between the inner surface 3a of the upper half 3 and the inner surface 4a of the bottom of the lower half 4.

A rectangular recess 3b is formed approximately in the center of the inner surface 3a of the upper half 3.
A tapered surface 6 is formed at the center of the upper end side in the figure.
Further, in the center of the upper end side of the upper half 3 in FIG.
A is formed.

A center hole 8 for inserting the turntable 30 of the disk drive device is formed in the center of the bottom of the lower half 4, and a center hole 8 is formed at the bottom left corner in FIG. A vertically elongated insertion hole 9 is formed into which a release pin 31 of a disk drive device is inserted. Further, a head insertion hole 7a is provided at the bottom of the lower half 4 at a position opposite to the head insertion hole 7a of the upper half 3.
A head insertion hole 7b having the same shape as the head insertion hole 7b is formed. These head insertion holes 7a and 7b can be opened and closed by a sliding U-shaped shutter 10. This shutter 10 is biased by a substantially V-shaped spring 11 in a direction that always closes the head insertion holes 7a, 7b.
This prevents dirt, dust, etc. from entering the cartridge main body 2 from a and 7b. Furthermore, a positioning hole 12 and an adjustment hole 13 are formed in the bottom left corner part and the right bottom corner part of the bottom of the lower half 4, respectively.

The magnetic disk 5 is formed in the shape of a thick disk of polyamide (PEI) or the like, and can be recorded and reproduced on both sides by a pair of magnetic heads of the disk drive device. A center hub receiving hole 5a formed in the center of the magnetic disk 5 has a circular disk-shaped center hub 14 made of synthetic resin attached with screws 15 or the like.
Three leaf springs 1 are attached to the inner peripheral surface of the center hole 14a of the center hub 14 so as to form a substantially equilateral triangle shape.
6, 16, 16 are provided protrudingly. Between these three leaf springs 16, 16, 16, the turntable 3
The shaft portion 30a of No. 0 is fitted therein. Further, an annular metal plate 17 is caulked and fixed to the lower surface of the center hub 14. This metal plate 17 is adapted to be attracted to a disc-shaped magnet 32 fixed to the upper surface of the turntable 30 when the turntable 30 is loaded.

When not in use, the upper surface 14b of the center hub 14 can be pressed against and released from a pressing member 18, which is disposed above the magnetic disk 5 so as to be able to reciprocate toward the shutter 10 side. This pressing member 18 is formed into a substantially F-shape from a plate-shaped metal, and both end portions 18a and 18b can freely slide onto an annular rib 4b formed protrudingly from the inner surface 4a of the bottom portion of the lower half 4. ing. The distal end side of the central portion 18c of this pressing member 18 is formed in an E-shape, and a tapered portion 19 that contacts the tapered surface 6 of the upper half 3 is formed in the center by being bent at a predetermined angle. be. Further, the release pin 3 inserted from the elongated insertion hole 9 of the lower half 4 is provided at the lower end side of the left end portion 18a of the pressing member 18 in FIG.
An engaging portion 20 with which the connector 1 engages is bent at a right angle, and a compression leaf spring 21 as an elastic portion is integrally formed with the engaging portion 20. This compression plate spring 21 is bent into a substantially U-shape, and is attached so that its tip 21a abuts against the peripheral wall 4c of the lower half 4 and the pressing member 18 moves in the side direction of the shutter 10. It is strong.

When the disk cartridge 1 is not in use, as shown in FIG. 18 moves downward on the disk 5 side, and the center portion 18c of the pressing member 18 presses the center hub 14 downward, and the lower surface of the magnetic disk 5 on the center hub receiving hole 5a side is pressed against the center hole 8 side of the lower half 4. Annular rib 4
By pressing and locking the magnetic disk 5 against the cartridge body 2, the magnetic disk 5 is prevented from moving loosely within the cartridge body 2.

Further, when the disk cartridge 1 is loaded into a disk drive device for recording and reproduction, when the cartridge main body 2 is loaded into the turntable 30 of the disk drive device, the release pin 31 of the disk drive device is pressed against the pressing member 18. It engages with the engaging portion 19. From this state, a release pin drive mechanism (not shown) moves the release pin 31 downward in FIG.
moves against the elastic force of As a result, as shown in FIG.
b, and the magnetic disk 5 is pressed by the pressing member 18.
At the same time, the center hub 14 is attracted to the magnet 32 of the turntable 30 and chucked.

[Problems to be solved by the invention] However, since the upward and downward reciprocation of the pressing member 18 is performed by the tapered surface 6 of the upper half 3, if the upper half 3 is bent downward (toward the lower half 4 side). If the pressing force of the disc 5 against the center hub 14 becomes too strong and the upper half 3 bends upward (outside), the pressing force of the disc 5 against the center hub 14 becomes weak, causing the pressing member 18 to There was a drawback that the power was not stable.

Therefore, this invention provides a disk cartridge that can stabilize the pressing locking force of the disk onto the center hub 14.

[Means for Solving the Problems] The disk cartridge of this invention includes an upper half and a lower half, each having a center hole in the center and an insertion hole for inserting a release pin of a disk drive device in one end corner. a cartridge body consisting of a disk rotatably housed in the cartridge body; a shutter for opening and closing a disk exposure hole formed on the other end edge of the cartridge body; and one end fixed to the inner surface of the upper half. and has a plate-shaped pressing member that presses the center hub of the disk against the inner surface of the lower half by an elastic biasing force on the other end side, and an engaging portion that engages with a midway part of the pressing member on one end side. , having a contact portion on the other end side with which the release pin that is inserted from the insertion hole of the lower half comes into contact, and is disposed so as to be able to reciprocate along the inner surface of the upper half, and the insertion hole of the lower half; and a release arm that moves the pressing member to release the pressing force toward the disk side when the release pin is inserted.

[Operation] The center hub of the disk is pressed against the inner surface of the lower half by the elastic biasing force of the other end of the pressing member whose one end is fixed to the inner surface of the upper half.
Since the release is performed by sliding the release arm moved by the release pin, the pressing force of this pressing member against the disk is not affected by the bending deformation of the upper half, etc., as in the conventional case. This further stabilizes the pressing force of the pressing member against the center hub of the disk, and reliably prevents the disk from moving loosely within the cartridge body when the disk cartridge is not in use.

[Example] Hereinafter, an example of this invention will be described in detail with reference to the drawings. Incidentally, parts that are the same as those in the conventional configuration are given the same reference numerals, and redundant explanation thereof will be omitted.

In FIGS. 1 to 3, 1 is a disk cartridge. This disk cartridge 1 consists of a cartridge main body 2 consisting of an upper half 3 and a lower half 4 having an elongated insertion hole 9 for inserting a release pin 31 of a disk drive device at one end corner side.
, a magnetic disk 5 rotatably housed in the cartridge body 2, and a shutter 10 for opening and closing head insertion holes (disk exposure holes) 7a and 7b formed on the other end edge of the cartridge body 2.
This is the same as in the prior art described above.

Here, the elongated insertion hole 9 of the lower half 4 is the first
It is formed linearly between the corner portion 4A on the lower left side in the figure and the positioning hole 12 for inserting the positioning fixing pin 33 of the disk drive device. A plate spring as a pressing member is mounted on the inner surface 3a of the upper half 3 on the magnetic disk 5 on the diagonal line between the lower left corner 4A and the upper right corner 4B of the lower half 4. One end (fixed end) 22a of 22 is fixed with a pair of resin screws 23, 23.
This leaf spring 22 is formed into a generally T-shape as a whole, and the other end (free end) 22b side is formed into a roughly C-shape, so that the center hub 14 of the magnetic disk 5 is pushed downward by its elastic biasing force. It is pressed against a rib 4d formed on the inner surface 4a of the upper right corner portion 4B of the half 4.

Further, on the diagonal positioning hole 12 and the center hub 14, a long rectangular plate-shaped release arm 24 for releasing the pressing force of the plate spring 22 toward the center hub 14 side of the magnetic disk 5 is installed. It is arranged so that it can freely move back and forth in the direction of the arrow in the figure. This release arm 24 is connected to the inner surface 3a of the upper half 3.
A pair of L-shaped guide parts 4e, 4 integrally molded with
e and a pair of protrusions 4f, 4f to allow reciprocating movement in parallel along the inner surface 3a of the upper half 3. A rectangular engagement hole 25 is formed at one end 24a of the release arm 24 as an engagement portion for engaging the midway portion 22c of the leaf spring 22. In this engagement hole 25, one end 2 of the plate spring 22 is provided.
It passes through the middle part 22c of the leaf spring 22 so that the end 2a of the leaf spring 22 is above the release arm 24, and the other end 22b of the leaf spring 22 is below the release arm 24. Furthermore, the other end 24b of the release arm 24 has a contact portion 26, which is in contact with the release pin 31 of the disk drive device inserted through the elongated insertion hole 9 of the lower half 4, at a right angle twice to form a Z-shape. It is bent. A compression coil spring 27 is interposed between the contact portion 26 and a U-shaped protrusion 4g integrally formed at the lower left corner of the inner surface 3a of the upper half 3. This compression coil spring 27
Due to the compressive elastic force of the release arm 24, the second
The leaf spring 2 is pressed in the direction of the arrow in the figure.
The center hub 14 is locked by pressing the upper surface 14b of the center hub 14 of the magnetic disk 5 against a rib 4d protruding from the center hole 8 of the lower half 4 at the other end 22b of the magnetic disk 5. still,
The tip of the release pin 31 inserted through the elongated insertion hole 9 of the lower half 4 has a tapered surface 31a.
Similarly to the positioning and fixing pin 33, the release pin 31 is fixed at a predetermined position of the disk drive device at a predetermined distance from the positioning and fixing pin 33.

According to the disk cartridge 1 of the embodiment described above, when the disk cartridge 1 is not in use, as shown in FIG. Release arm 24 always energized
Since the other end 22b of the leaf spring 22 is always pressed against the center hub 14 of the magnetic disk 5 against the rib 4d of the lower half 4, the pressing force of the leaf spring 22 is reduced by the bending deformation of the upper half 3 as in the conventional case. etc. will not be affected. As a result, the pressing force of the plate spring 22 of the magnetic disk 5 against the center hub 14 becomes even more stable, and the magnetic disk 5 is reliably locked by the plate spring 22, and the cartridge body 2
I don't get angry inside.

Furthermore, when this disk cartridge 1 is loaded into the disk drive device, the elongated insertion hole 9 of the lower half 4 and the positioning hole 1
2 is the release pin 31 of the disk drive device
and is fitted into the positioning fixing pin 33. By fitting the positioning fixing pin 33, the loading position of the disk cartridge 1 is determined, and by fitting the release pin 31, the tip tapered surface 31a of the release pin 31 comes into contact with the contact portion 26 of the leaf spring 22. Compression coil spring 27
The plate spring 22 is moved toward the lower left corner portion 4A of the lower half 4 against the elastic force. As a result, the leaf spring 22 moves upward and the other end 22b separates from the upper surface 14b of the center hub 14, and the magnetic disk 5 is released from the pressed lock state, so that the center hub 14 is attached to the turntable of the disk drive device. 30 is attracted and chucked by the magnet 32. Since the release pin 31 is fixed in this way, there is no need for a release pin drive mechanism as in the conventional case, which makes it possible to simplify the structure of the cartridge body 2 and the structure of the disk drive device. , it is possible to achieve cost reduction.

Although the above embodiment has been described with respect to a disk cartridge for magnetic disks, the present invention is not limited thereto, and can of course be applied to a disk cartridge for optical disks read by optical pickup. In addition, the compression coil spring 27
Although it is provided separately from the release arm 24, the other end of the release arm 24 may be bent into a predetermined shape and integrally formed as a compression elastic part.

[Effect of the invention] As described above, according to this invention, the center hub of the disk is pressed against the inner surface of the lower half by the elastic biasing force of the other end of the pressing member whose one end is fixed to the inner surface of the upper half. Since the release is performed by sliding the release arm that is moved by the release pin, the pressing force of this pressing member against the center hub of the disk is not affected by deformation of the upper half of the cartridge body, etc., as in the past. It can be made more stable without any problems.
Therefore, when the disk cartridge is not in use, it is possible to reliably prevent the disk from moving loosely within the cartridge body.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the lower half of a disk cartridge showing an embodiment of this invention, Fig. 2 is a sectional view taken along line B-B in Fig. 1, and Fig. 3 is a plan view of the lower half of a disk cartridge showing an embodiment of this invention. FIG. 4 is a plan view showing a part of the interior of a conventional disk cartridge; FIG. 5 is an enlarged sectional view taken along line A-A in FIG. 4; This figure is a view corresponding to FIG. 5 showing a state in which the disk drive device is loaded. 1... Disk cartridge, 2... Cartridge body, 3... Upper half, 3a... Inner surface, 4...
...lower half, 4a...inner surface, 5...disc, 7
a, 7b...Head insertion hole (disk exposure hole),
8... Center hole, 9... Insertion hole, 10... Shutter, 14... Center hub, 22,... Plate spring (pressing member), 22a... One end, 22b... Other end, 22c... Midway Part, 24...Release arm, 2
5... Engagement hole (engaging part), 26... Contact part, 31
...Release pin.

Claims (1)

[Scope of Claim for Utility Model Registration] A cartridge main body consisting of an upper half and a lower half having a center hole in the center and an insertion hole for inserting a release pin of a disk drive device in one end corner, and this cartridge a disk rotatably housed in the main body; a shutter for opening and closing a disk exposure hole formed on the other end edge of the cartridge main body; one end fixed to the inner surface of the upper half, and an elastic a plate-shaped pressing member that presses the center hub of the disk against the inner surface of the lower half by force; an engaging portion that engages with a midway part of the pressing member on one end; The release pin inserted through the insertion hole of the upper half has an abutment portion that abuts, and is disposed so as to be able to reciprocate along the inner surface of the upper half, and the release pin is inserted into the insertion hole of the lower half. What is claimed is: 1. A disk cartridge comprising: a release arm that moves a pressing member to release its pressing force on the disk side;