JP2982711B2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly, to a slider to which a shutter is attached and an urging means for pressing the slider to urge the shutter in a direction of closing the cover, the upper and lower parts constituting the cartridge. The present invention relates to a cartridge that can be attached from the outside of the cartridge after the half is assembled.

[0002]

2. Description of the Related Art As a conventional disk cartridge, there is one disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 63-47475.

FIG. 6 shows a conventional disk cartridge.
As shown in FIGS. 6A to 6C, the upper and lower halves 41, 4
The disk-shaped recording medium is rotatably housed in a cartridge 43 composed of two cartridges 43, and a pair of sliders 44 interposed between the upper and lower halves 41, 42 are formed so as to protrude from the facing surfaces 41a, 42a of the upper and lower halves 41, 42. A U-shaped shutter 47 is configured to be guided and slid by a guide groove 46 between guide ribs 45 and attached to the slider 44.
To open and close the opening provided in the cartridge with
The slider is pressed by a torsion spring 48 which is a biasing means inserted between the upper and lower halves 41 and 42 and assembled.
7 is slidably biased in the closing direction.

At this time, the torsion spring 48 is formed by integrally forming a coil 48c at the center of a pair of arms 48a and 48b having a substantially V shape. Then, the torsion spring 48 and the coil 48c side to the head, the facing surface 41a of the upper and lower halves 41 and 42, the guide ribs 45 outer wide from the gap G ₁ of each pair of inter 42a passes through the narrow gap G ₂ opposite vertical Insert the arms 48a, 48b in the direction indicated by the arrow a to a predetermined position between the halves 41, 42, and insert the ends of the arms 48a, 48b into the locking portions 49 on the end surface of the slider 44 and the locking portions (not shown) in the cartridge 43, respectively Assembled with locking.

[0005]

However, conventionally, when the torsion spring 48 is inserted between the upper and lower halves 41 and 42 in the direction of arrow a and assembled, as shown in FIG. Easily collides with the vertical side surface 45a of the outer guide rib 45 (the upper side in FIG. 6B), and the insertion of the torsion spring 48 between the upper and lower halves 41 and 42 was easily performed.

Further, the coil 48c is easily deformed by the collision, and there is a problem in safety.
If the coil 48c is deformed, the biasing force of the shutter 48 in the cover closing direction varies, causing a problem that the shutter 48 cannot be reliably slidably biased to the cover closing position.

Further, when the slider 44 is assembled prior to the insertion of the torsion spring 48, the conventional slider cannot be externally incorporated between the upper and lower halves 41 and 42 like the torsion spring 48. Therefore, the slider 44 must be assembled in a state where the accommodated disk is exposed, and there is a risk that the disk may be inadvertently scratched or fingerprinted.

According to the present invention, a slider to which a shutter is mounted and a biasing means for pressing the slider to bias the shutter in the direction of closing the cover are easily mounted from the outside of the cartridge after assembling the upper and lower halves constituting the cartridge. It is an object of the present invention to provide a tape cartridge which can be used.

[0009]

In order to achieve the above object, a tape cartridge according to the present invention rotatably accommodates a disk-shaped medium between upper and lower halves provided with openings for inserting a head and the like. In a disk cartridge composed of upper and lower halves, a reciprocating motion along one edge of the assembled upper and lower halves to open and close the opening, a slider attached to the shirtter and guiding the shirtter, and a slider A guide rail that is protruded and inserted from an opening provided at one end edge of the assembled upper and lower halves and is guided by guide ribs and guide grooves provided on the upper and lower halves, respectively, 1 that are opposed to each other at intervals and are fitted into the guide grooves of the upper and lower halves, respectively.
The pair of bulges , when placed at a predetermined position in the assembled upper and lower halves, are separated from each other from the central portion
Biasing means for biasing the shirt in the closing direction by a pair of arms extending in the direction, wherein the guide surfaces of the guide ribs are spaced apart from each other by an opening provided at the one end edge of the guide groove. The pair of bulging portions of the guide rail are tapered, and the pair of bulging portions are inserted when the guide rail is inserted from an opening provided at the one end edge. portion is elastically deformed in a direction to reduce the distance between these two, upper
The guide surface of the guide rib is formed through an opening provided at the one end edge.
At the center and the center of the biasing means to be inserted
The pair of arms to be successively inserted is assembled in the order described above.
Guide to the predetermined position in the upright half
The upper and lower halves assembled with the damper and the urging means.
Are configured to be attached to respective predetermined positions from outside .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk cartridge using a magneto-optical disk according to the present invention will be described below with reference to the drawings.

First, the entire disc cartridge will be described with reference to FIGS.

A rectangular and flat cartridge 1 is formed of a plurality of screws 4 with upper and lower halves 2 and 3 formed of synthetic resin.
Are formed by joining together. This cartridge 1
A magneto-optical disk 5, which is a disk-shaped recording medium, is rotatably accommodated therein. The center core 6 of the magneto-optical disk 5 is loosely fitted in a circular opening 7 for inserting a turntable provided substantially in the center of the lower half 3.
A substantially circular rib 8 for positioning the outer periphery of the magneto-optical disk 5 is integrally formed in the upper and lower halves 1 and 2.

At one end 1a of the cartridge 1, a rectangular opening 9 for inserting an optical head is formed substantially at the center of the lower half 3 so as to be continuous with the opening 7. The upper half 2 also has a rectangular opening for inserting a magnet coil. Opening 10 is formed. The ends 1a of the openings 9 and 10 are bridged by a thin bridge arm 1b integrally formed with the upper and lower halves 2 and 3 along the center of the vertical thickness of the cartridge 1.

The slider 12 is formed of a synthetic resin, and a pair of guide rails 13 are integrally formed at both ends in the length direction. A pair of upper and lower guide grooves 14 are formed on both sides of the bridging arm 11 on the opposing surfaces of the upper and lower halves 2 and 3 so as to be parallel to one end 1a of the cartridge 1. And
A pair of bulges formed on each of the guide rails 13 of the slider 12 are engaged with the guide grooves 14 and attached so as to straddle the outside of the bridging arm 1b. Along the arrows b and c.

The shutter 16 is pressed in a U-shape by a metal plate such as stainless steel, and has a long rectangular lower shutter plate 17 that opens and closes both openings 7 and 9 of the lower half 3.
And a short rectangular upper shutter plate 18 for opening and closing the opening 10 of the upper half 2, and a connecting plate 19 for connecting these. The connecting plate 19 of the shutter 16 is fixed to the slider 12 with a plurality of screws 20, and the upper and lower shutter plates 17, 18 are slidably overlapped on the outer sides of the upper and lower halves 2, 3.

The torsion spring 22 as the urging means is formed by integrally forming a coil 25 at the center of a pair of arms 23 and 24 so as to form a substantially V-shape.
The tips 23a, 24a of 24 are bent in an L-shape in opposite directions. The torsion spring 22 is inserted into the substantially triangular space 26 formed between the one end edge 1a of the cartridge 1 and the rib 8 from the direction of arrow a and assembled. The tip 23a of one arm 23 of the torsion spring 22 has a locking portion 27a formed on one end surface of the slider 12 in the sliding direction (the direction of the arrows b and c).
The tip 24a of the other arm 24 is locked by a locking portion 27b provided in the cartridge 1.

[0017] Then, as shown in FIG. 3, the torsion spring 22
The shutter 16 is slid in the closing direction (the direction of the arrow b) to the closing position via the slider 12 by the slider 12, and the upper and lower shutter plates 17, 18 of the shutter 16 at the closing position cause the openings 7, 9 and 10 is configured to be closed.

[0018] When the disc cartridge is loaded in the recording and reproducing apparatus, as shown in FIG. 4, the open until lid opening position against the shutter lid opening pin 28 to the shutter 16 and the slider 12 is the torsion spring 22 The cartridge 1 is slid in the lid direction (the direction of arrow c) and
And 10 are opened. The center core 6 of the magneto-optical disk 5 is chucked on a turntable (not shown) which is relatively inserted into the opening 7 from below, and the optical head and the magnet coil (both are inserted into the openings 9 and 10). (Not shown) is inserted. Then, the magneto-optical disk 5 is rotationally driven by the turntable, and scanning is performed in the radial direction by the optical head while a magnetic field is applied to the magneto-optical disk by the magnet coil to perform desired recording. At the time of reproduction, reading is performed by an optical head without applying a magnetic field to the magneto-optical disk 5.

The outer surface of the lower half 3 has a shutter 1
A guide rail 29 for guiding the tip of the lower shutter plate 17 is fixed by bonding, welding or the like.

Next, the main part of the present invention will be described with reference to FIGS. 1 (A) to 1 (C). First, upper and lower half 2,
The guide groove 14 formed between the pair of guide ribs 31 and 32 is integrally formed into a shape protruding from the opposing surfaces 2a and 3a of the upper and lower halves 2 and 3. The bulging portion of the guide rail 13 of the slider 12 is sandwiched between the pair of guide ribs 31 and 32, and is slid along the guide groove 14.

Next, of the pair of guide ribs 31 and 32, the outside of the cartridge 1 (the upper side in FIG. 1A).
The pair of guide ribs 31 located on the side of the arrow a, which is the direction of insertion of the torsion spring 22, has an inclined surface (arrow a) that guides the inserted torsion spring 22 to the center P side between the upper and lower halves 2, 3. The slope is tapered toward the direction.) 33.

[0022] Then, the torsion spring 22 to the coil 25 side at the top, the narrow gap G to the opposing surface 2a of the upper and lower halves 2 and 3, guide ribs 31 and 32 outwardly wide from the gap G ₁ of each pair of inter-3a faces ₂ into the space 26 between the upper and lower halves 2 and 3 in the direction of the arrow a.
The torsion springs 2 are used to lock the tips 23a and 24a of the cartridge 4 to the sliders 12 and the locking portions 27a and 27b of the cartridge 1.
2 is inserted between the upper and lower halves 2 and 3 and assembled.

At this time, as shown in FIG. 1B, the leading coil 25 is guided by one of the slopes 33 of the pair of guide ribs 31, and the coil 25 is moved between the upper and lower halves 2, 3. it is possible to naturally guided to the center P side, it can be smoothly inserted into the coil 25 partially in a narrow gap G _2.

Therefore, the coil 25 of the torsion spring 22 does not collide with the guide rib 31 and is not deformed, so that the torsion spring 22 can be assembled safely and easily. Then, the coil 25 portion is not deformed at all, closing direction of the shutter 16 by the torsion spring 22 shown in FIG. 3 (arrow b direction)
Can be exerted as designed, and sliding bias can be reliably performed in the direction of arrow b to the closed position of the shutter 16.

Next, in this disk cartridge, as shown in FIGS. 5A to 5C, a slit 35 is formed along the center of a pair of guide rails 13 of the slider 12, and these guides are formed. A tapered slope 36 is formed on both sides of the tip 13 a of the rail 13.

Therefore, the upper and lower halves 2 and 3 are
After assembling, the pair of guide rails 13 of the slider 12 are inserted between the upper
4 can be easily engaged. That is, when the guide rail 13 is inserted between the upper and lower halves 2 and 3 in the direction of the arrow a from the tip end 13a side, as shown in FIG. 5B, the slopes 36 on both sides of the guide rail 13 and the pair of guide ribs 31
Of the guide rail 1 by the guiding action of the
3, the tip 13a easily bends against the elasticity in the direction of arrow d so as to reduce the width of the slit 35. Thus, the guide rail 13 passes smoothly narrow gap G _2. After the passage, as shown in FIG. 5 (C), the tip 13a of the guide rail 13 elastically returns in the direction of arrow e so as to enlarge the width of the slit 35, and the guide rail 13 is moved to the pair of guide grooves 14 Smoothly engaged inside.

As described above, after assembling the upper and lower halves 2 and 3, the slider 12 is inserted between the upper and lower halves 2 and 3 in the direction of arrow a, and the guide rail 13 is connected to the upper and lower halves 2 and 3.
It can be easily engaged in the guide rails 14 between them and assembled.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical idea of the present invention.

The present invention is applicable to various disk cartridges using various disk-shaped media other than the magneto-optical disk.

[0030]

Since the present invention is configured as described above, the following effects can be obtained.

The slider can be assembled after the upper and lower halves have been assembled, and there is no danger of the disk being accidentally damaged when the slider is assembled. Moreover, it is possible to assemble with a simple operation of pushing the slider between the upper and lower halves.

When the biasing means is inserted between the upper and lower halves and assembled, the guide surface formed on the guide rib and the central part of the biasing means and the central part of the biasing means are inserted subsequently.
Can guided to a predetermined position between the turn the upper and lower halves of the pair of arms
You. Therefore, Ki out that the biasing means is a guide rib between the upper and lower halves is smoothly inserted into the narrow gap opposite biasing
No Rukoto deformed by colliding with means to guide ribs,
Assembling of the urging means can be performed safely and easily, and workability and reliability of assembling the urging means can be significantly improved.

[Brief description of the drawings]

FIGS. 1A to 1C are enlarged cross-sectional views taken along the line AA in FIG. 3 for explaining assembly of a torsion spring according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the entire disc cartridge according to one embodiment of the present invention.

FIG. 3 is a partially cutaway plan view showing the entire disc cartridge according to one embodiment of the present invention.

FIG. 4 is a partially cutaway plan view showing the same whole as FIG. 3;

5 (A) to 5 (C) are enlarged sectional views for explaining the assembly of the slider.

6 (A) to 6 (C) are enlarged cross-sectional views illustrating assembly of a conventional torsion spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cartridge 2 Upper half 2a Opposing surface 3a Opposing surface 3 Lower half 5 Magneto-optical disk (disk-shaped recording medium) 7 Opening 9 Opening 10 Opening 12 Slider 13 Guide rail 14 Guide groove 16 Shutter 22 Torsion spring (biasing means) 31 Guide rib 33 Slope a Insertion direction P Center between upper and lower halves

Claims (1)

(57) [Claims] 1. A disk cartridge comprising a disk-shaped medium rotatably accommodated between upper and lower halves having openings for inserting a head and the like, and one end edge of the assembled upper and lower halves. A shirt that reciprocates along and opens and closes the opening; a slider that is attached to the shirt and guides the shirt; and an opening provided at one edge of the upper and lower halves protruding from the slider and assembled. A guide rail that is inserted and guided by guide ribs and guide grooves provided in the upper and lower halves, respectively, is disposed opposite to a tip of the guide rail at a predetermined interval, and is fitted into the guide grooves of the upper and lower halves, respectively. 1
A pair of bulging portions, and are arranged at predetermined positions in the assembled upper and lower halves.
A pair extending in the direction away from the center
Urging means for urging the shirt star in the closing direction by the arm of the guide rib, the distance between the guide surfaces of the guide ribs is from the opening provided at the one end edge toward the edge of the guide groove. The pair of bulging portions of the guide rail are tapered, and the pair of bulging portions are located between the two when the guide rail is inserted from an opening provided at the one end edge. Is elastically deformed in a direction to decrease the interval, and the guide surface of the guide rib is provided with an opening provided at the one end edge.
The central part of the urging means inserted from the central part and the central part
The pair of arms inserted subsequently to the pair
A disk cartridge configured to be guided to a predetermined position in the upper and lower halves so that the slider and the urging means can be mounted at respective predetermined positions from outside the assembled upper and lower halves.