JPH03214456A - Disk drive - Google Patents

Abstract

PURPOSE:To effectively use the upper plane side of a cartridge holder and to improve the mounting workability of a shutter opening/closing arm by mounting the shutter opening/closing arm at the cartridge holder, and setting the arm so that it can be rotated in the cartridge holder. CONSTITUTION:When a disk cartridge 2 is inserted to the cartridge holder 5, the shutter opening/closing operating part 42 of the shutter opening/closing arm 6 is fitted in a recessed part 52 for fitting shutter opening/closing operation part, and the shutter 7 of the cartridge 2 is opened as rotating the arm 6 centering rotational central axes 44, 45. When the cartridge arrives at a prescribed position, the tip plane of the cartridge 2 is abutted with the plane 66 to be pressed of a lock lever 8, and the lever 8 is rotated centering a supporting shaft 67m, which releases the lock of a slide plate 9 by a connecting piece 65. The plate 9 is slided with a spring 10, and descends the holder 5 perpendicularly, and attracts and fixes the hub 4 of a disk 13 on the chucking yoke 81 of a turntable 15. Meanwhile, a head arm 34 is also inclined downward setting a supporting shaft 101 as a fulcrum, which makes a head 16 bring into contact with a disk plane.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Industrial application field B. Summary of the invention C. Conventional technologyD. Problem to be solved by the inventionE. Means for solving problems F. ActionG. Example G1. Schematic configuration of disk drive G, . Cartridge holder configuration G3, shutter opening/closing arm configuration G4. Structure of slide plate G,. Turntable configuration G6. Head carriage, other configurations G, . Effects of Examples H. Effects of the invention Cattle carriage drive mechanism, A. INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to a disk drive in which a shutter opening/closing arm is attached to a cartridge holder, and the shutter of a disk cartridge is opened and closed by the shutter opening/closing arm.

B. Summary of the Invention The present invention includes a cartridge holder and a shutter opening/closing arm, and when a disc cartridge is inserted into the cartridge holder, the shutter opening/closing arm is pressed by the disc cartridge and moves laterally. In disk drives that are designed to open the shutter of a disk cartridge, the shutter opening/closing arm, which was conventionally attached to the top plate of the cartridge holder, is installed inside the cartridge holder, allowing the top side of the cartridge holder to be attached to the printed circuit board. This allows for effective use as mounting space.

Further, the present invention provides that the shutter opening/closing arm is integrally formed with a shutter opening/closing operation part such as a shutter pin that engages with the shutter of the disk cartridge to open the shutter, and a rotation center shaft for attaching the shutter opening/closing arm to the cartridge holder. The shutter opening/closing arm is rotatably mounted within the cartridge holder by fitting the upper and lower ends of the rotation center shaft into a pair of upper and lower bearing holes provided in the cartridge holder. The shutter opening/closing arm for the cartridge holder eliminates the work process of attaching a shutter opening/closing operation part such as a shutter bin to the shutter opening/closing arm, and also eliminates the troublesome process of attaching the shutter opening/closing arm to the cartridge holder using a separate shaft member from the shutter opening/closing arm. The shutter can be quickly and reliably installed by simply fitting the upper and lower ends of the rotation center shaft, which is formed integrally with the shutter opening/closing arm, into the pair of upper and lower bearing holes provided in the cartridge holder. The opening/closing arm can be installed inside the cartridge holder.

C. As shown in FIG. 9 in a conventional disk drive, when a disk cartridge 201 is inserted into a cartridge holder 202, a shutter opening/closing arm 203 attached to the cartridge holder 202 is attached to the lower surface of one end side (extrusion end side). Shutter pin 204 as a shutter opening/closing operation unit
is fitted into the recess 205 for fitting the shutter operation part provided on the distal end surface of the disk cartridge 201 in the insertion direction, firstly, the shutter 206 is unlocked, and when the disk cartridge 201 is further inserted, the shutter opening/closing arm 2
03 rotates clockwise in FIG. 9 about the pivot shaft 207 while stretching the coil spring 208 for returning the shutter opening/closing arm, so that the shutter opening/closing operation section 204 opens the shutter 206 of the disk cartridge 201. It is known what has been done.

D. Problems to be Solved by the Invention However, conventional disk drives of this type generally have a
As shown in the figure, the shutter opening/closing arm 203 is arranged on the top plate 209 of the cartridge holder 202, and one end thereof is connected to a pivot shaft 207 separate from the shutter opening/closing arm 203.
The shutter bin 204 is rotatably attached to the upper plate 209 of the cartridge holder 202 and is attached to the free end of the shutter opening/closing arm 203 by a method such as caulking.
Cartridge holder 202 is inserted through cutout window 210 formed in
Because they were allowed to infiltrate the inside of the home, there were problems as described below.

(1) Since the shutter opening/closing arm 203 is mounted on the top plate 209 of the cartridge holder 202, it is difficult to mount a printed circuit board on the top plate 209 of the cartridge holder 202. Not available.

(2) Shutter pin 204 as a shutter opening/closing operation part
Since the shutter opening/closing arm 203 is connected to the shutter opening/closing arm 203 in a so-called cantilever manner by caulking or the like, the connection strength between the two is weak.

(3) It is troublesome to attach the shutter opening/closing arm 203 to the cartridge holder 202. Also, shutter pin 2
04 is pressed by the disk cartridge 201 or the like, the shutter opening/closing arm 203 is likely to be twisted and excessive force is likely to be applied to the pivot shaft 207.

The present invention solves the above-mentioned conventional problems, allows the upper surface side of the cartridge holder to be effectively used as a space for arranging a printed circuit board, and also simplifies the work of attaching a shutter opening/closing operation part such as a shutter pin to the shutter opening/closing arm. This eliminates the need for the shutter opening/closing arm and allows the shutter opening/closing arm to be easily attached to the cartridge holder, thereby improving the workability of attaching the shutter opening/closing arm.

E. Means for Solving the Problems (1) A cartridge holder that raises and lowers an inserted disc cartridge, and a cartridge holder that is attached to the cartridge holder and opens the shutter of the disc cartridge while being moved by being pressed by the inserted disc cartridge. In the disk cartridge equipped with a shutter opening/closing arm, the shutter opening/closing arm was attached within a cartridge holder.

(2) The shutter opening/closing arm is integrally formed with a shutter opening/closing operation part such as a shutter pin that engages with the shutter of the disk cartridge to open the shutter, and a rotation center shaft that attaches the shutter opening/closing arm to the cartridge holder. By fitting the upper and lower ends of the rotation center shaft into a pair of upper and lower bearing holes provided in the cartridge holder,
The shutter opening/closing arm is rotatably mounted inside the cartridge holder.

F. Function (1) Since the shutter opening/closing arm is installed in the cartridge holder, the shutter opening/closing arm is accommodated in the cartridge holder and protected by the cartridge holder.

Therefore, it is no longer necessary to attach the shutter opening/closing arm to the top surface of the cartridge holder, as has been done up to now, and the top surface of the cartridge holder can be used more effectively as a space for arranging a printed circuit board.

(2) Since the shutter opening/closing operation part is formed integrally with the shutter opening/closing arm, there is no need to attach a shutter opening/closing operation part such as a shutter bin to the shutter opening/closing arm as in the conventional case. Naturally, it is also possible to prevent the shutter opening/closing operation section from falling off from the shutter opening/closing arm due to detachment.

In addition, the shutter opening/closing arm can be quickly and reliably attached to the cartridge holder by simply fitting the upper and lower ends of the rotation center shaft formed integrally with the shutter opening/closing arm into the upper and lower pair of bearing holes provided in the cartridge holder. It can be mounted rotatably within the

G. Example GI. Schematic structure of a disk drive FIG. 1 is a perspective view of the disk drive with the printed circuit board removed, and FIG. 2 is a plan view thereof.

In this disk drive 1, when a disk cartridge 2 is inserted into a cartridge holder 5 from a cartridge insertion opening 4 of a front panel 3, a shutter opening/closing arm 6 attached to the cartridge holder 5 rotates and opens a shutter 7 of the disk cartridge 2. At the same time as opening, the slide plate lock lever 8 is pressed by the distal end surface of the disk cartridge 2 in the insertion direction, and the slide plate 9, which is unlocked by the lock lever 8, slides in the holder loading direction by the spring force of the slide plate return spring 10. Inclined cam grooves 11...11 for raising and lowering the holder are provided on the left and right sides of the slide plate 9.
The cam groove engaging protrusions 12...12 and the cartridge holder 5 provided with these engaging protrusions 12...l2 are vertically lowered along hub 1 of disk 13
4 is mounted on a turntable 15 provided on the chassis side, and a head 16 is brought into contact with the disk 13 mounted on the turntable 15.

Then, while rotating the turntable 15 and the disk 13 by the rotary drive operation mechanism I7, the head l6 is rotated.
Recording and reproduction are carried out by moving the bed carriage 18 to which the disc 13 is attached in the radial direction of the disk 13 using a carriage drive mechanism 19.

G. Composition of Cartridge Holder As shown in FIG. 3, the cartridge holder 5 includes a top plate 21 formed of a metal plate into a concave shape, and the top plate 2.
A pair of left and right side masks 22 and 23 connected to the left and right sides of 1
A pair of lower plates 24 and 25 are connected to the lower end sides of the left and right pair of side plates 22 and 23 to form a front opening shape, and the disk cartridge 2 is inserted through the opening on the front side.
In addition, flat plate-shaped cam groove engaging protrusions 12 and 12 are cut and raised in the horizontal direction at both front and rear ends of the pair of left and right side plates 22 and 23, respectively. At the same time, a roller mounting piece 26 is vertically cut and formed in the center.

A roller 27 is attached to the roller attachment piece 26, and by attaching these rollers 27, 27 to the elevation guide holes 31 provided in the left and right side walls 29, 30 of the chassis 28, the cartridge holder 5 is moved above the chassis 28. The cam grooves 11, 11, and 12 provided on the slide plate 9 are attached to the slide plate 9 so as to be vertically movable up and down, and the cam groove engaging protrusions 12.12 provided on the front and rear ends of the left and right side plates 22.23 are attached to the slide plate 9. '11 and said slide plate 9
By reciprocating the cartridge holder 5, the cartridge holder 5 is moved up and down in the vertical direction.

When the cartridge holder 5 is raised, the head operating section 32 formed on the top plate 21 of the holder 5
As a result, the head arm 34 is connected via the holder contact piece 33.
The head arm 34 rotates so as to be lifted up.
Head 1 provided on the lower surface of the tip side (free end side) of
6 is in an unloaded state.

Further, when the cartridge holder 5 is lowered, the head arm 34 is also lowered together with the cartridge holder 5, and the head 16 attached to the lower surface of the distal end side of the head arm 34 is moved toward the disk 13 mounted on the turntable I5. Contact the top surface. When the head 16 comes into contact with the upper surface of the disk 13, the head arm 34 does not descend any further and only the cartridge holder 5 descends slightly. and the holder abutting piece 33 provided on the head arm 34 are in a non-contact state, allowing the head carriage 18 to travel in a state where there is no contact resistance between them.

G3. Structure of the shutter opening/closing arm As shown in FIG. 4, the shutter opening/closing arm 6 includes an arm main body 4l having an S-shape in plan, a shutter opening/closing operating section 42 provided at one end of the arm main body 41, and the arm A rotation center shaft forming portion 43 provided at the other end of the main body portion 4l, a pair of upper and lower rotation center shafts 44 and 45 protruding from the upper and lower surfaces of the rotation center shaft forming portion 43, and the rotation center shaft It consists of a spring locking part 46 formed at an example part of the forming part 43 at substantially right angles to the arm main body part 41, and these arm main body part 41, shutter opening/closing operation part 42, rotation center shaft forming part 43, rotation The central shaft 44, 45 and the spring locking portion 46 are integrally formed of plastic.

The wall thicknesses of the arm main body portion 41, the rotation center shaft forming portion 43, and the spring locking portion 46 are formed to be slightly smaller than the gap between the upper surface plate 21 and the lower surface plate 22, 23 of the cartridge holder 5, The lengths of the Nyatta opening/closing operation part 42 and the rotation center shaft 44.45 are formed to be slightly thicker than the gap between the upper surface side 21 of the cartridge holder 5 and the lower surface plate 22.23, and the length of the rotation center shaft 44. Axis 44.45
is formed in a so-called rectangular shape with a difference in width W and length Q, and is formed with its length direction facing the direction of the shutter opening/closing operation section 42.

As shown in FIG. 5, the length direction of the pair of rectangular upper and lower rotation center axes 44 and 45 of the shutter opening/closing arm 6 is arranged substantially parallel to the side plate 23 of the cartridge holder 5. , these upper and lower pair of rotation center axes 44.45
is the width W of the rotation center shafts 44 and 45 provided on the opposing parts of the upper surface plate 21 and the lower surface plate 25 of the cartridge holder 5, respectively.
The rotation center shaft 4 is inserted through the shaft introduction hole 47, which has a width slightly wider than that of the rotation center shaft 4.
4. Bearing hole 48 with a slightly thicker diameter than the length l of 45
5, and then rotate it by a predetermined angle counterclockwise in FIG.
As shown in Fig. 7, a cutout window 49 provided in the top plate 21 of the cartridge holder 5 for regulating the rotation range of the shutter opening/closing arm.
It's starting to fit in.

When the upper end of the shutter opening/closing operation section 42 is fitted into the cutout window 49, the rotation center shaft 44.45 and the shaft introduction hole 47 are misaligned, and the shaft introduction hole 47 This prevents the rotation center shafts 44, 45 from coming off.

The shutter opening/closing arm 6 installed in the cartridge holder 5 as described above is locked at one end by the spring locking portion 46, and the other end is locked by the spring locking portion provided on the top plate 21 of the cartridge holder 5. A rotational force is applied in the clockwise direction in FIG. 6 by the spring force of a coil spring 5l locked to the shutter 50, and the upper end of the shutter opening/closing operation part 42 is in contact with one side of the notched window 49. .

If the disc cartridge 2 is inserted into the cartridge holder 5 in this state, the disc cartridge 2 will be inserted into the cartridge holder 5. Skartridge 2
When the shutter opening/closing operation part 42 is fitted into the recess 52 for receiving the shutter opening/closing bin provided at The shutter 7 is opened by the shutter opening/closing operation section 42 while rotating counterclockwise in the figure.

G4. Structure of Slide Plate The slide plate 9 is for vertically lowering and raising the cartridge holder 5, that is, for loading and unloading, and is slidably attached to the chassis 28, and can be slid in the disk cartridge insertion direction. The cartridge holder 5 is loaded, and the cartridge holder 5 is unloaded by sliding in the disk cartridge ejection direction. The slide plate 9 is moved back in the loading direction by the traction force of the slide plate return spring 10.

As shown in FIG. 3, the slide plate 9 is formed into a front opening shape by a metal bottom plate 61 and left and right side plates 62 and 63 formed by bending the left and right sides of the bottom plate 61 at approximately right angles. These left and right side plates 62,
Slanted cam grooves 11.11 for raising and lowering the holder are formed at the front and rear ends of the holder 63, respectively. Then, cam groove engaging protrusions 12.12 formed at the front and rear ends of the left and right side plates 22.23 of the cartridge holder 5 are fitted into these cam grooves 11.11. .12 is located at the lower end of the cam groove 11.11, the cartridge holder 5 is in the loading state, and when the cam groove engaging projections 12, 12 are located at the upper end of the cam groove 11.11. The cartridge holder 5 is in the unloading state.

The slide plate 9 has a slide plate return spring 1
Normally, the cartridge holder 5 is moved in the loading direction with a spring force of 0, and the cartridge holder 5 is in the loading state.

Therefore, when the cartridge holder 5 is in the loading state, the eject button 64 attached to one end surface of the slide plate 9 is pressed to slide the slide plate 9 in the unloading direction against the spring force of the slide plate return spring 10. Then, the cam groove engaging protrusion 12.12 rises along the inclined surface on the lower end side of the cam groove 11.11, the cartridge holder 5 enters the unloading state, and the slide plate 9 moves to the slide plate opening!
It is locked by the lock plate locking piece 65 of the cleverer 8, and is in a state in which return movement is prevented.

In the unloading state of the cartridge holder 5, if the disk cartridge 2 in the cartridge holder 5 is inserted, the disk cartridge 2
the shutter 7 is opened by the shutter opening/closing arm 6,
When the disk cartridge 2 is further inserted, the tip end surface of the disk cartridge 2 in the insertion direction presses the pressed portion 66 of the slide plate lock lever 8, and the slide plate lock lever 8 engages the pivot shaft erected on the shear 28. 67 in the clockwise direction in FIG. 3, the slide plate 9 is unlocked by the lock plate engaging piece 65. The unlocked slide plate 9 slides in the loading direction by the spring force of the slide plate return spring 10, and lowers the cam groove engaging protrusion 12.12 along the inclined surface on the upper end side of the cam groove 11.11. ,
This brings the cartridge holder 5 into a loading state.

Note that the slide plate lever 8 is attached to the chassis 2.
The slide plate locking piece 65, the pressed portion 66, and the spring locking piece 69 are provided at an interval of approximately 90' on the outside of the bearing portion 68, into which the pivot shaft 67 is inserted, which is erected on the bearing portion 68. The coil spring 70 locks one end of the spring locking piece 69 and locks the other end of the spring locking piece 69 to the chassis 28 so that it can rotate clockwise and counterclockwise and automatically return. installed.

When the slide plate 9 slides in the loading direction, the front end surface 72 of the slide plate locking piece 65 is pushed by the front surface of the locked portion 71 provided on the slide plate 9, and the slide plate opening lever is pushed. 8 first escapes and rotates clockwise against the spring force of the coil spring 70, and when the pressure by the locked portion 71 is released, the slide plate opening lever 8 returns and rotates due to the spring force of the coil spring 70. The slide plate locking piece engages with the back side of the locked portion 71 to prevent the slide plate 9 from sliding in the loading direction by the slide plate return spring 10. When the disk cartridge 2 is inserted into the cartridge holder 5 in this state, the pressed portion 66 is pressed by the front end surface of the disk cartridge 2 as described above, and the slide plate opening lever 8 is rotated to rotate the slide plate 9. This will unlock the lock.

G. Structure of the turntable The turntable I5 has a disk 13 as shown in FIG.
It consists of a chuck yoke 81 on which the hub 14 is placed, and a disc 82 for increasing inertia attached to the outer periphery of the chuck yoke 81.

The chuck yoke 8l is made of a magnetized plastic mixed with ferrite, so-called Bramag.
A rotating shaft 83 is attached to the central part, and
A drive pin 84 is provided at the eccentric position, and the lower end of the rotating shaft (spindle shaft) 83 is rotatably attached to the chassis 28 via a bearing 85. Then, as described above, when the cartridge holder 5 into which the disc cartridge 2 is inserted is lowered or loaded,
Hub 14 of disk 13 in cartridge holder 2
is attracted to the chuck yoke 81, and the upper ends of the rotating shaft 83 and the drive pin 84 are fitted into the bearing hole and pin receiving hole provided in the hub l4, respectively, and the hub 14 is attached to the chuck yoke 81.
The rotation of the chuck yoke 81 is transmitted to the hub 14 via the drive pin 84.

The disk 82 for increasing inertia is made of a metal plate in a ring shape, and an inner ring member 86 and an outer ring member 87 are made of plastic and are outsert on the inner and outer sides thereof, respectively. By press-fitting the chuck yoke 81 into the inner circumference of the inner ring member 86 as a chuck yoke fitting member, the disk 82 for increasing inertia is detachably attached to the outer circumference of the chuck yoke 81. It is now possible to

Further, the outer circumferential surface of the disc 82 is formed by the outer circumferential gear 87.
It is covered in a ring shape with a continuous plastic sheet 88, and a part thereof is cut out to form a PG detection part 89 in which the background of the metal disc 82 is exposed.
Utilizing the difference in reflectance between the PG detection section 89 and the plastic sheet 87, a PG detection sensor 90 attached to the chassis 28 side detects PG.

In addition, there are several types of inertia increasing discs 82 with different weights.
If you prepare in advance, it will be possible to
Can be used freely.

Then, an external rotational force is obtained from a rotary drive operation mechanism 17 consisting of a guard belt 9l suspended on a gear surface on the outer periphery of the inner ring member 86 and a motor 92 for driving the guard belt. 82 and the chuck yoke 81 rotate, and an operating force for an auto-eject mechanism (not shown) is obtained via the outer ring member 87. 93 is a tension lever for applying a predetermined tension to the guard belt 91.

G6. Hend carriage, carriage drive mechanism, and other components The head carriage 18 is slidably mounted on a guide shaft 94, and the guide shaft 94 is mounted on the chassis 28 by a guide shaft holder 95.

The head carriage 18 is adapted to move along the guide shaft 94 in the radial direction of the disk l3 placed on the chuck yoke 81.

The carriage drive mechanism 19 includes a motor 96, a pole shaft (helical shaft) 97 rotated by the motor 96, and a support frame 98 that rotatably supports the ball shaft 97.
It consists of

Then, by rotating the ball shaft 97 with the motor 96 while the ball shaft 97 is engaged with the pole shaft engaging portion 99 provided on the head carriage 18, the rotational movement of the ball shaft 97 is transferred to the hesod carriage 18. The head carriage 18 is made to slide along the guide shaft 94 instead of moving in a straight line.

Further, the head carriage 18 is provided with a head arm support stand 100 for supporting the head arm 34. 34 is attached to one end side, and the head 16 is attached to the lower surface of the other end side (free end side).

The head arm 34 is provided with the holder abutting piece 33 as described above, and the holder abutting piece 33 abuts the head t1 portion 32 of the cartridge holder 5, so that the cartridge holder 5 can be unloaded. When the head arm 34 is raised to the /g position, the pivot plate 101 made of a leaf spring is bent upward, and the head arm 34 is in the up position, so that the tip thereof protrudes above the top plate 21 of the cartridge holder 5. It has become.

Then, a printed circuit board 102 for controlling the motor 92 of the rotary drive operation mechanism 17 and the motor 96 of the head carriage drive mechanism 19 is placed above the top plate 2l of the cartridge holder 5 that has been raised to the unloading position, and The disk drive is made thinner by arranging it at a position below the tip of the head arm 34 in the state, which has conventionally not been effectively used as a dead space.

Note that 103 is a shield case made of metal plate. G7.
Effects of the Embodiment Since the disc cartridge of the embodiment has the configuration described above, when the disc cartridge 2 is inserted into the cartridge holder 5 while the cartridge holder 5 is in the unloading position, the insertion direction of the disc cartridge 2 is The shutter opening/closing operation section 42 of the shutter opening/closing arm 6 is fitted into the recess 52 for fitting the shutter opening/closing operation section provided on the front end surface of the shutter opening/closing arm 6, and the shutter opening/closing arm 6 rotates about the pair of upper and lower rotation center shafts 44 and 45. The shutter 7 of the disk cartridge 2 is opened while rotating.

When the disk cartridge 2 is inserted to a predetermined position, the leading end surface of the disk cartridge 2 in the insertion direction comes into contact with the pressed portion 66 of the slide plate lock lever 8 and presses the pressed portion 66. The spout/knob lever 8 rotates around the pivot shaft 67 to release the lock of the slide plate 9 by the spout/knob plate locking piece 65.

The slide plate 9 that has been unlocked by the slide plate lock lever 8 is moved to the slide plate return spring 1.
The cartridge holder 5 is slid in the loading direction with a spring force of 0, and the cartridge holder 5 is vertically lowered by the inclined surface on the upper end side of the cam groove 11, and the groove 1 of the disk 13 in the disk cartridge 2 inserted into the cartridge holder 5 is removed. The tab 14 is suctioned and fixed onto the channel yoke 81 of the turntable 15. On the other hand, as the cartridge holder 5 descends, the head arm 34 also rotates about the pivot plate 101 and tilts downward, and the hub 14 of the disk 13 is suctioned and fixed onto the chuck yoke 81. , the head I6 is brought into contact with the disk surface with a predetermined pressure.

Then, when the rotary drive operation mechanism 17 is turned on and the motor 92 starts rotating, the rotation of the motor 92 is transmitted to the ring-shaped disc 82 for increasing inertia via the guard belt 91, and the ring-shaped disc 82 is rotated. Recording and reproduction are performed while rotating the wheel yoke 81 press-fitted into the inner circumferential side of the plate 82 and the disk I3 placed on the wheel yoke 81, and moving the head carriage 18.

When the eject button 64 is pressed and the slide plate 9 is slid in the unloading direction after recording and playback is finished, the cartridge holder 5 rises vertically on the inclined surface of the lower end of the cam groove 11, and enters the unloading state. At the same time, the slide plate 9 is locked by the slide plate lock lever 8, and the cartridge holder 5 is maintained in the unloaded state.

H. Effects of the Invention The disk drive of the present invention has the following effects.

(1) Since the shutter opening/closing arm is installed inside the cartridge holder, the shutter opening/closing arm is protected by the cartridge holder.

Further, the outer periphery of the cartridge holder, especially the upper surface side, can be effectively used as a space for arranging a print base.

(2) Since the shutter opening/closing operation part is integrally formed with the shutter opening/closing arm, it is possible to omit the conventional process of attaching the shutter opening/closing operation part to the shutter opening/closing arm.

Further, the shutter opening/closing arm can be easily attached to the cartridge holder by fitting the upper and lower ends of the rotation center shaft formed integrally with the shutter opening/closing arm into the pair of upper and lower bearing holes provided in the cartridge holder.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the disk drive of the present invention with the printed circuit board removed from the top surface of the cartridge holder, Fig. 2 is a plan view, Fig. 3 is an exploded perspective view, and Fig. 4 is a perspective view of the Shanota opening/closing arm. , FIG. 5 is a bottom view showing how to attach the shutter opening/closing arm, FIG. 6 is a bottom view with the shutter opening/closing arm attached, FIG. 7 is a sectional view of the same, and FIG. 8 is a sectional view of the turntable. FIG. 9 is a perspective view of a conventional example. DESCRIPTION OF SYMBOLS 1...Disk drive, 2...Disk cartridge repository, 5...Cartridge holder, 6...Shanota opening/closing arm, 7...Shanota, 42...Shasota opening/closing operation part, 44.45.・Rotation center axis, 48...Bearing hole. =169-

Claims (2)

[Claims] (1) It is equipped with a cartridge holder that raises and lowers the inserted disc cartridge, and a shutter opening/closing arm that is attached to the cartridge holder and opens the shutter of the disc cartridge while being pressed by the inserted disc cartridge and moving. , a disk drive characterized in that the shutter opening/closing arm is mounted within a cartridge holder. (2) It is equipped with a cartridge holder that raises and lowers the inserted disc cartridge, and a shutter opening/closing arm that is attached to the cartridge holder and opens the shutter of the disc cartridge while rotating when pressed by the inserted disc cartridge. The shutter opening/closing arm is integrally formed with a shutter opening/closing operating part that engages with the shutter to open the shutter, and a rotational center axis for attaching the shutter opening/closing arm to the cartridge holder, A disk drive characterized in that a shutter opening/closing arm is rotatably mounted in a cartridge holder by fitting its lower end into a pair of upper and lower bearing holes provided in the cartridge holder.