KR100264831B1 - Disc drive - Google Patents

Abstract

The present invention relates to a disc drive in which a shutter opening and closing arm is attached to a cartridge holder, and the shutter opening and closing arm is opened and closed by the shutter opening and closing arm. The disc drive of the present invention includes a cartridge holder for elevating and inserting a disc cartridge. The shutter opening and closing arm, which is mounted on the cartridge holder and is pressed by the inserted disc cartridge, is opened to open the shutter of the disc cartridge, and the shutter opening and closing arm is mounted in the cartridge holder.

Description

Disk drive

1 is a perspective view of the disk drive of the present invention with the printed board removed from the top surface of the cartridge holder.

2 is a plan view thereof.

3 is an exploded perspective view thereof.

4 is a perspective view of the shutter opening and closing arm.

5 is a bottom view showing the mounting direction of the shutter opening and closing arm.

6 is a bottom view of the shutter opening and closing arm mounted.

7 is a cross-sectional view thereof.

8 is a cross-sectional view of the turntable.

9 is a perspective view of a conventional example.

* Explanation of symbols for main parts of the drawings

1: Disk Drive 2: Disk Cartridge

5: cartridge holder 6: shutter opening and closing arm

7: shutter 42: shutter opening and closing control unit

44,45: center of rotation axis 48: bearing hole

The present invention relates to a disc drive in which a shutter opening and closing arm is mounted on a cartridge holder, and the shutter opening and closing arm is opened and closed by the shutter opening and closing arm.

According to the present invention, a cartridge holder and a shutter opening and closing arm are provided. When the disc cartridge is inserted into the cartridge holder, the disc opening and closing movement of the shutter opening and closing arm is performed by pressing the disc cartridge to open the shutter of the disc cartridge. In the disc drive, the shutter opening and closing arm, which is conventionally mounted on the upper plate of the cartridge holder, is mounted in the cartridge holder, so that the upper surface side of the cartridge holder can be effectively used as a mounting space for a printed board or the like.

In addition, the present invention integrally forms a shutter opening and closing operation unit, such as a shutter pin that engages the shutter opening and closing of the disc cartridge to the shutter opening and closing arm, and a rotation center shaft for mounting the shutter opening and closing arm to the cartridge holder. By inserting the upper and lower ends of the shaft into a pair of upper and lower bearing holes formed in the cartridge holder, the shutter opening and closing arm is rotatably mounted in the cartridge holder, so that a shutter opening and closing operation unit such as a shutter pin is mounted on the shutter opening and closing arm. At the same time, the shutter opening and closing arm and the separate shaft member are used to remove the shutter opening and closing arm from the cumbersome cartridge holder that attaches the shutter opening and closing arm to the cartridge holder. The shutter can be quickly and securely fastened by simply inserting an end portion into a pair of upper and lower bearing holes formed in the cartridge holder. It will have to be equipped with a lung in a cartridge holder.

As shown in FIG. 9, when the disc cartridge 201 is inserted into the cartridge holder 202 as the disc drive, the bottom surface of one end (free end side) of the shutter opening / closing arm 203 attached to the cartridge holder 202 is inserted. The shutter pin 204 serving as the shutter opening / closing operation portion attached to the fitting is inserted into the recessed portion 205 for fitting the shutter operation portion formed on the distal end surface of the disc cartridge 201 in the insertion direction. When the disc cartridge 201 is inserted again, the shutter opening and closing arm 203 extends the coil spring 208 for returning the shutter opening and closing arm around the shaft support shaft 207, and the clockwise direction of FIG. It is known that the shutter 206 of the disc cartridge 201 is obtained by the shutter opening and closing operation unit 204.

In the conventional disc drive of this type, however, the shutter opening and closing arm 203 is disposed on the top plate 209 of the cartridge holder 202, as shown in FIG. As a shutter opening and closing portion which is rotatably mounted on the top plate 209 by a shaft support shaft 207 separate from 203, and mounted on the free end side of the shutter opening and closing arm 203 by a method such as caulking engagement. Since the shutter pin 204 penetrates into the cartridge holder 202 from the cutout window 210 formed in the top plate 209 of the cartridge holder 202, there is a problem 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 board on the top plate 209 of the cartridge holder 202. The upper surface side of 202 cannot be used effectively.

(2) Since the shutter pin 204 as the shutter opening and closing operation portion is coupled to the shutter opening and closing arm 203 by a method such as caulking, so-called cantilever coupling, the coupling strength of both is weak.

(3) The mounting work of the shutter opening and closing arm 203 to the cartridge holder 202 is complicated. In addition, when the shutter pin 204 is pressed by the disc cartridge 201 or the like, the shutter opening and closing arm 203 is distorted, and excessive force is easily applied to the shaft support shaft 207.

The present invention solves the above problems and makes it possible to effectively use the upper surface side of the cartridge holder as an arrangement space of a printed board, and eliminates the need to attach a shutter opening and closing operation unit such as a shutter pin to the shutter opening and closing arm. In addition, the shutter opening and closing arm can be easily attached to the cartridge holder, thereby improving the mounting workability of the shutter opening and closing arm.

(1) A disc cartridge comprising a cartridge holder for elevating an inserted disc cartridge, and a shutter opening / closing arm which is mounted on the cartridge holder and is pressed by the inserted disc cartridge to open the shutter of the disc cartridge. The shutter opening and closing arm was mounted in the cartridge holder.

(2) The shutter opening / closing operation unit, such as a shutter pin for engaging the shutter of the disc cartridge with the shutter opening / closing arm and opening the shutter, and a rotation center shaft for attaching the shutter opening / closing arm to the cartridge holder, are formed integrally with each other. The shutter opening and closing arm was rotatably mounted in the cartridge holder by inserting the end portion into a pair of upper and lower bearing holes formed in the cartridge holder.

(1) Since the shutter opening and closing arm was attached to the cartridge holder, the shutter opening and closing arm was accommodated in the cartridge holder, thereby protecting the cartridge holder.

Therefore, since the shutter opening and closing arm need not be attached to the upper surface of the cartridge holder as before, the upper surface side of the cartridge holder can be used more effectively as an arrangement space of a printed board or the like.

(2) Since the shutter opening and closing operation portion is formed integrally with the shutter opening and closing arm, it is unnecessary to attach a shutter opening and closing operation portion such as a shutter pin to the shutter opening and closing arm as in the related art. It is also possible to prevent the shutter opening / closing operation part from falling off from the shutter opening / closing arm due to the fact that it is taken out or attached.

In addition, the shutter opening and closing arm can be rotatably mounted in the cartridge holder by a simple operation of fitting the upper and lower ends of the rotation center shaft formed integrally with the shutter opening and closing arm to the pair of upper and lower bearing holes formed in the cartridge holder. .

EMBODIMENT OF THE INVENTION Next, the Example of this invention is described in detail according to drawing.

1. Schematic Configuration of Disk Drive

1 is a perspective view of a disk drive with a printed board removed, and FIG. 2 is a plan view thereof. The disc drive 1 inserts the disc cartridge 2 into the cartridge holder 5 from the cartridge insertion opening 4 of the front panel 3, so that the shutter opening / closing arm 6 attached to the cartridge holder 5 While rotating the shutter 7 of the disc cartridge 2 while rotating, the slide plate lock lever 8 is pressed at the distal end of the disc cartridge 2 in the insertion direction, and the lock by the lock lever 8 is released. The inclined cam groove 11 for elevating the holder formed by sliding the slide plate 9 in the holder loading direction by the force of the slide plate return spring 10. According to (11), the groove engaging projections 12 ... 12 and the cartridge holders 5 provided with these engaging projections 12 ... 12 are lowered in the vertical direction, and the cartridge holders 5 Turntable provided on the chassis side by the hub 14 of the disk 13 in the disk cartridge 2 inserted into the At the same time, the 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 17, the head carriage 18 on which the head 16 is mounted is transferred to the carriage drive mechanism 19 of the disk 13. Recording and reproducing are performed by moving in the radial direction.

2. Composition of cartridge holder

The cartridge holder 4 has a top plate 21 formed in a planar shape by a metal plate as shown in FIG. 3, and a pair of left and right side plates protruded on the left and right sides of the top plate 21. 22, 23, and a pair of bottom plates 24 and 25, which are spoken to the lower ends of the pair of left and right side plates 22 and 23, are formed in the front □ shape, and the front side. The disc cartridge 2 is inserted from the opening of the opening, and at the front and rear ends of the pair of left and right side plates 22 and 23, flat cam groove engaging projections 12 and 12 are horizontally disposed, respectively. At the same time, the roller mounting piece 26 is formed in the vertical direction.

A roller 27 is attached to the roller mounting piece 26, and the lifting guide holes in which these rollers 27 and 27 are formed on the side walls 29 and 30 on the left and right sides of the chassis 28 are mounted. The cartridge holder 5 is mounted on the chassis 31 so that the cartridge holder 5 can be lifted up and down in the vertical direction on the chassis 28, and the cam groove engaging protrusions are provided at the front and rear ends of the left and right side plates 22 and 23, respectively. (12) and (12) are inserted into the cam grooves (11) and (11) formed in the slide plate (9), and the slide holder (9) is reciprocated to move the cartridge holder (5) in the vertical direction. It is supposed to be.

Then, when the cartridge holder 5 is raised, the head arm 34 is lifted up through the holder contact piece 33 by the head operating portion 32 formed on the top plate 21 of the holder 5. It rotates so that the head 16 provided in the lower surface of the front end side (free end side) of this head arm 34 will be in the unloaded state.

When the cartridge holder 5 is lowered, the head arm 34 is lowered together with the cartridge holder 5, and the head 16 mounted on the lower surface of the tip side of the head arm 34 is turned on the turntable 15. Is in contact with the upper surface of the disk (13) mounted above. When the head 16 is in contact with the upper surface of the disk 13, the head arm 34 does not lower any more, only the cartridge holder 5 is slightly lowered again, so that the upper plate 21 of the cartridge holder 5 The formed head operation part 32 and the holder contact piece 33 provided in the head arm 34 become a non-contact state, and can drive the head carriage 18 in the state which removed the contact resistance between them.

3. Composition of shutter opening and closing cancer

As shown in FIG. 4, the shutter opening / closing arm 6 includes a flat S-shaped arm body portion 41, a shutter opening and closing portion 42 provided at one end of the arm body portion 41, and the arm body. Rotating center shaft forming portion 43 provided at the other end of the portion 41, a pair of upper and lower rotating center shafts 44, 45 protruding from the upper and lower surfaces of the rotating center shaft forming portion 43, and the rotation One side of the central axis forming portion 43 is composed of a spring stop portion 46 formed at approximately right angles to the arm body portion 41, these arm body portion 41, shutter opening and closing operation portion 42, the center of rotation The shaft forming portion 43, the center of rotation shaft 44, 45, the spring stop 46 is integrally formed of plastic.

The thickness of the arm body portion 41, the rotation center axis forming portion 43, and the spring stop portion 46 is a gap between the upper plate 21 and the lower plate 22, 23 of the cartridge holder (5) While slightly smaller, the length of the shutter opening / closing operation part 42 and the center of rotation shafts 44 and 45 is the upper surface side 21 and the lower surface plates 22 and 23 of the cartridge holder 5. It is formed slightly larger than the gap therebetween, and the rotational center axes 44 and 45 are formed in a so-called rectangular shape with a difference in width w and length l, and the longitudinal direction is in the direction of the shutter opening / closing operation part 42. It is formed in the state toward.

And, as shown in FIG. 5, the longitudinal direction of the rectangular upper and lower pairs of rotation center shafts 44 and 45 of the shutter opening / closing arm 6 is substantially parallel to the side plate 23 of the cartridge holder 5. Of the upper and lower pairs of rotary center shafts 44 and 46 in opposing portions of the upper surface plate 21 and the lower surface plate 25 of the cartridge holder 5 in parallel with each other. ), 45 is inserted into the bearing hole 48 with a diameter slightly larger than the length L of the center of rotation shaft 44, 45 from the shaft introduction hole 47, which is slightly larger than the width w of the width w. When the predetermined angle is rotated counterclockwise, the shutter opening / closing arm rotation range is formed on the upper plate 21 of the cartridge holder 5 as shown in FIGS. It is fitted to the cutout window 49 of a dragon.

In the state where the upper end of the shutter opening / closing operation part 42 is fitted into the cutout window 49, the positions of the center of rotation shafts 44, 45 and the shaft introduction hole 47 are displaced so that these shaft introduction holes ( The rotation center shafts 44 and 45 are prevented from escaping from 47.

In the shutter opening and closing arm 6 mounted in the cartridge holder 5 as described above, one end is engaged with the spring stop 46, and the other end is provided on the upper plate 21 of the cartridge holder 5. As shown in FIG. The rotational force is imparted in the clockwise direction of FIG. 6 by the force of the coil spring 51 held by the spring stopper 50, and an upper end of the shutter opening / closing operation part 42 is provided on one side of the cutout window 49. FIG. In contact.

Then, when the disc cartridge 2 is inserted into the cartridge holder 5 in this state, the shutter opening and closing operation portion 42 is fitted into the recess 52 for the shutter opening and closing pin formed in the disc cartridge 2, and again. When the disc cartridge 2 is inserted, the shutter opening / closing arm 6 rotates in the counterclockwise direction of FIG. 6 with respect to the rotation center axes 44 and 46, and the shutter opening and closing part 42 7) is to open.

4. Composition of slide plate

The slide plate 9 is for lowering, raising, or loading and unloading the cartridge holder 5 in the vertical direction. The slide plate 9 is slidably mounted on the chassis 28 and slides in the disc cartridge insertion direction. ) And the cartridge holder 5 is unloaded by sliding in the disc cartridge discharge direction. The slide plate 9 is in a state of being moved back in the loading direction by the pulling force of the slide plate return spring 10.

형으로 제작되어 있고, 이들 좌우의 측판(62),(63)의 전후의 단부에 각각 상기 홀더승강용의 경사형상의 캠홈(11),(11)이 형성되어 있다. 그리고, 이들 캠홈(11),(11)에 상기 카트리지홀더(5)의 좌우의 측면판(22),(23)의 전후의 단부에 형성한 캠홈계합돌기(12),(12)가 끼워지며, 이들 캠홉계합돌기(12),(12)가 캠홈(11),(11)의 하단측에 위치하고 있을 때는 카트리지홀더(5)는 로딩상태가 되며, 캠홈계합돌기(12),(12)가 캠홈(11),(11)의 상단측에 위치하고 있을 때는 카트리지홀더(5)는 언로딩상태가 된다.The slide plate 9 is formed by a metal bottom plate 61 and left and right side plates 62 and 63 formed by bending at right and left sides of the bottom plate 61 at approximately right angles, as shown in FIG. face

The cam grooves 11 and 11 for elevating said holder are formed in the edge part before and behind these left and right side plates 62 and 63, respectively. Then, the cam groove engaging projections 12 and 12 formed at the front and rear ends of the left and right side plates 22 and 23 of the cartridge holder 5 are fitted into these cam grooves 11 and 11. When the cam hop engaging projections 12 and 12 are located at the lower ends of the cam grooves 11 and 11, the cartridge holder 5 is in a loading state, and the cam groove engaging projections 12 and 12 are The cartridge holder 5 is in an unloading state when it is located at the upper end side of the cam grooves 11 and 11.

The slide plate 9 is moved in the normal loading direction by the force of the slide plate return spring 10, and the cartridge holder 5 is in the loading state.

Therefore, in the loading state of the cartridge holder 5, the eject button 64 mounted on one end surface of the slide plate 9 is pressed, and the slide plate 9 is applied to the force of the slide plate return spring 10. FIG. When it slides in the unloading direction, the cam groove engaging protrusions 12 and 12 are raised along the inclined surfaces of the cam grooves 11 and 11, and the cartridge holder 5 is in the unloading state. The slide plate 9 is locked by the lock plate locking piece 65 of the slide plate lock lever 8 so that the return movement is prevented.

Then, in the unloading state of the cartridge holder 5, when the disc cartridge 2 in the cartridge holder 5 is inserted, the shutter 7 of the disc cartridge 2 is opened by the shutter opening / closing arm 6. When the disc cartridge 2 is opened again, the pressed portion 66 of the slide plate lock lever 8 is pushed to the front end surface of the disc cartridge 2 in the insertion direction, and the slide plate lock lever 8 moves to the chassis 28. The lock of the slide plate 9 by the lock plate locking piece 65 is released by rotating in the clockwise direction of FIG. 3 with respect to the support shaft 67 installed above. The slide plate 9 which is unlocked slides in the loading direction by the force of the slide plate return spring 10, and the cam groove engaging protrusions 12 and 12 are in accordance with the inclined surfaces of the upper ends of the cam grooves 11 and 11. ) Is lowered and the cartridge holder 5 is loaded.

In addition, the slide plate lock lever 8 has a slide portion 68 having an interval of approximately 90 ° on the outside of the bearing portion 68 for inserting the shaft support shaft 67 that is installed on the chassis 28. A coil spring in which the piece 65, the to-be-pressed part 66, and the spring catching piece 69 are disposed, latches one end side of the spring catching fan 69 and the other end side is latched on the chassis 28 side. 70) rotatable in the clockwise and counterclockwise direction and mounted automatically.

Then, when the slide plate 9 slides in the loading direction, the front end surface of the slide plate locking piece 65 is pressed against the front surface of the to-be-engaged portion 71 provided on the slide plate 9, and the slide plate lock lever Eight (8) is rotated in the clockwise direction in response to the force of the coil spring (70), the slide plate lock lever (8) by the force of the coil spring (70) when the pressing by the locking portion 71 is released. It rotates back and a slide plate locking piece engages with the back side of the said latched part 71, and stops the slide to the loading direction of the slide plate 9 by the slide plate return spring 10. As shown in FIG. In this state, when the disc cartridge 2 is inserted into the cartridge holder 5, the pressing member 66 is pressed against the end surface of the disc cartridge 2 as described above, and the slide plate lock lever 8 rotates. The lock of the slide plate 9 is released.

5. Composition of the turntable

As shown in FIG. 3, the turntable 15 includes a chuck yoke 81 for mounting the hub 14 of the disk 13 and an original plate for increasing inertia mounted to an outer circumference of the chuck yoke 81. 82).

The chuck yoke 81 is made of a so-called plastic plamag, which is fertilized with ferrite or the like, and is equipped with a rotating shaft 83 at the center thereof and a driving pin at its eccentric position. 84 is arrange | positioned and the lower end part of the said rotating shaft (spindle shaft) 83 is attached so that the rotation to the chassis 28 through the bearing 85 is possible. As described above, when the cartridge holder 5 into which the disc cartridge 2 is inserted is lowered or loaded, the hub 14 of the disc 13 in the cartridge holder 5 is sucked to the chuck yoke 81. The upper ends of the rotary shaft 83 and the driving pin 84 are fitted into the bearing hole and the pin receiving hole formed in the hub 14, respectively, so that the hub 14 is fixedly positioned on the chuck yoke 81, The rotation of the chuck yoke 81 is transmitted to the hub 14 through the driving pin 84.

The inner plate 82 for increasing the inertia is formed in a ring shape by a metal plate, and the inner circumferential side ring member 86 and the outer circumferential side ring member 87 are made of plastic on the inner circumferential side and the outer circumferential side, respectively. The inner circumferential side ring member 86 is a chuck yoke-sensing member, and the inner circumference side ring member 86 is press-fitted into the inner circumference of the inner circumferential ring member 86 so that the inner plate 82 for increasing the inertia is detachable. It is attached to the outer periphery of 81).

The outer circumferential side surface of the master plate 82 is covered with a plastic sheet 88 continuous with the outer circumferential side gear 87 in a ring shape, and a part of the master plate 82 is cut off to form the metal master plate 82. A PG detection unit 89 having a main body surface exposed to the PG detection unit 89 mounted on the chassis 28 side by using a difference in reflectance between the PG detection unit 89 and the plastic sheet 87. PG is detected.

In addition, if several kinds of inertia increasing disks 82 having different weights are prepared in advance, they can be freely selected and used according to the so-called jitter specifications.

In addition, an external rotational force is obtained from the rotational drive control mechanism 17 including the gear belt 91 and the gear belt driving motor 92 that spans the outer circumferential gear surface of the inner ring member 86. The disk 82 and the chuck yoke 81 are rotated and the operating force of the auto eject mechanism not shown is obtained through the outer circumferential side ring member 87. Numeral 93 is a tension lever for imparting a predetermined tension of the gear belt 91.

6. Configuration of head carriage, carriage driving mechanism and other

The head carriage 18 is slidably mounted to the guide shaft 94, and the guide shaft 94 is mounted on the chassis 28 by the guide shaft holder 95. The head carriage 18 moves in the radial direction of the disk 13 mounted on the chuck yoke 81 along the guide shaft 94.

In addition, the carriage drive mechanism 19 includes a motor 96, a ball shaft (helical shaft) 97 rotated by the motor 96, and a support frame 98 rotatably supporting the ball shaft 97. )

Then, the ball shaft 97 is rotated by the motor 96 in a state where the ball shaft engaging portion 99 provided on the head carriage 18 is engaged with the ball shaft 97, thereby rotating the ball shaft 97. The head carriage 18 is slid along the guide shaft 94 by changing the motion immediately before the head carriage 18.

In addition, the head carriage 18 is provided with a head arm support 100 for supporting the head arm 34, and through the axial support plate 101 made of a leaf spring that is bendable to the head arm support 100. The head 16 is mounted on one end side of the head arm 34 and on the lower surface of the other end side (free end side).

The head arm 34 is provided with a holder contact piece 33 as described above, and since the holder contact piece 33 is in contact with the head operating portion 32 of the cartridge holder 5, a cartridge holder is provided. When (5) is raised to the unloading position, the rotation supporting plate 101 made of the leaf spring is bent upwards, and the head arm 34 is in an up state, and its tip is the upper plate 21 of the cartridge holder 5. Protrude upwards).

Then, the cartridge holder 5 in which the printed circuit board 102 for controlling the motor 92 of the rotation driving mechanism 17 or the motor 96 of the head carriage driving mechanism 19 is raised to the unloading position. The disk drive can be made thinner by placing it at a position higher than the upper surface plate 21 of the upper surface plate 21 and lower than the distal end of the head arm 34 in the up state. have.

Reference numeral 103 denotes a shield case made of metal plate.

7. Action of Example

Since the disc cartridge of the embodiment is configured as 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 disc cartridge 2 is inserted. The shutter opening / closing operation part 42 of the shutter opening / closing arm 6 is fitted into the recess 52 for fitting the shutter opening / closing operation part formed on the front end surface of the direction, so that the shutter opening / closing arm 6 is a pair of upper and lower rotation center shafts 44. The shutter 7 of the disc cartridge 2 is opened while rotating about 45. Then, when the disc cartridge 2 is inserted to a predetermined position, the front end surface of the disc cartridge 2 in the insertion direction comes into contact with the press part 66 of the slide plate lock lever 8 to press the press part 66. Therefore, the slide plate lock lever 8 rotates about the shaft support shaft 67 to release the lock of the slide plate 9 by the lock plate locking piece 65.

The slide plate 9 in which the lock is released by the slide plate lock lever 8 slides in the loading direction by the force of the slide plate return spring 10, thereby moving the cartridge holder 5 from the inclined surface on the upper side of the cam groove 11. It is lowered vertically, and the hub 14 of the disk 13 in the disc cartridge 2 inserted into the cartridge holder 5 is fixed on the chuck yoke 81 of the turntable 15 by suction. On the other hand, as the cartridge holder 5 descends, the head arm 34 is also inclined downward while rotating with the support plate 101 as the support point, so that the hub 14 of the disk 13 rests on the chuck yoke 81. In the fixed state of adsorption, the head 16 is brought into contact with the disk surface at a predetermined pressure.

Then, when the switch of the rotary drive operation mechanism 17 is inserted and the motor 92 starts to rotate, the rotation of the motor 92 is carried out through the geared belt 91 to form an annular disk 82 for increasing the inertia. ), The chuck yoke 81 and the disk 13 mounted on the chuck yoke 81 are rotated and pressed into the inner circumferential side of the ring-shaped disk 82, and the head carriage 18 is rotated. Recording and playback are performed while driving.

When the slide plate 9 is slid in the unloading direction by pressing the eject button 64 after the recording and playback is finished, the cartridge holder 5 is lifted in the vertical direction from the inclined surface on the lower side of the cam groove 11 at this time. At the same time as the loading state, the slide plate 9 is locked by the slide plate lock lever 8 so that the cartridge holder 5 is kept in the unloading state.

The disk drive of the present invention has the following effects.

(1) Since the shutter opening and closing arm is mounted in the cartridge holder, the shutter opening and closing arm is protected by the cartridge holder.

In addition, the outer circumference of the cartridge holder, in particular, the upper surface side, can be effectively used as an arrangement space of the printed board.

(2) Since the shutter opening and closing operation portion is formed integrally with the shutter opening and closing arm, it becomes possible to omit a work process for attaching the shutter opening and closing operation portion to the shutter opening and closing arm as in the prior art.

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

Claims (1)

A cartridge holder for elevating the inserted disc cartridge, and a shutter opening and closing arm mounted on the cartridge holder to press and rotate the inserted disc cartridge to open the shutter of the disc cartridge. A pair of upper and lower bearings formed by integrally forming a shutter opening and closing operation unit for opening the shutter and a rotation center shaft for attaching the shutter opening and closing arm to the cartridge holder, and forming upper and lower ends of the rotation center shaft in the cartridge holder. And a shutter opening and closing arm rotatably mounted in the cartridge holder by fitting in the hole.

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