JP2997622B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD player,
The present invention relates to a disk reproducing device such as a ROM drive and a magneto-optical disk drive.

[0002]

2. Description of the Related Art In recent years, a disk player such as a CD player and a CD-ROM drive using an optical disk as a recording medium has been reduced in size and weight. Along with this, the development of a disk reproducing apparatus of a type built in a computer has been actively performed. 2. Description of the Related Art Conventionally, as a disk reproducing apparatus of this type, there is an apparatus configured so that a tray on which disks are mounted can be taken in and out of a cabinet.

FIGS. 17 and 18 show a conventional disk reproducing apparatus.

In these figures, reference numeral 1 denotes a cabinet. A mechanical unit 2 is housed inside the cabinet 1. The mechanical unit 2 includes an optical pickup 3 for reading recorded information on a disk 10, a tray 4, a turntable 12, a clamper 5, and the like. The pickup 3 is supported by a guide shaft 13 fixed to the base 6, and can move in the directions of arrows AB along the guide shaft 13. The tray 4 is supported by guide grooves 2a, 2a provided on both sides of the mechanical unit 2, and can move in the direction of arrow AB according to the guide grooves 2a, 2a. Further, the tray 4 can be pulled out from the cabinet 1 by a certain amount in the direction of arrow A. The clamper 5 is mounted on the plate 7 while being movable in the vertical direction.
Is held in. A motor 11 for driving the turntable 12 is fixed to the base 6 of the pickup 3. A turntable 12 is fixed to a rotating shaft of the motor 11. On the upper surface of the turntable 12, a disk chuck 12a fitted with the center hole 10a of the disk 10 is provided. One end of the base 6 is rotatably supported on the main body of the mechanical unit 2 via a shaft 14. The other end of the base 6 is connected to a rotating cam 16 through a pin 15. The rotating cam 16 has a spiral groove on its peripheral surface for inserting the pin 15. As the rotating cam 16 rotates, the position of the pin 15 is displaced up and down. The base 6 rotates about the rotation shaft 14 in the direction of arrow CD by the vertical movement of the pin 15.
Thereby, the position of the turntable 12 is set between the first position for clamping the disk 10 with the clamper 5 and the second position for forming a disk insertion opening with the clamper 5. You can switch with.

As shown in FIG. 18A, when the tray 4 is being ejected from the cabinet 1, the base 6 is in an inclined state, and the turntable 12 is at a second position with the disc insertion opening opened. The rotating cam 16 rotates in a predetermined direction after the tray 4 is inserted into the cabinet 1. As shown in FIG. 18B, the rotation of the rotary cam 16 causes the base 6 to rotate about the rotary shaft 14 by a predetermined angle in the direction of arrow C. As a result, the turntable 12 is raised, and the disc 10 stored in the tray 4 is
It is sandwiched between the turntable 12 and the clamper 5.

As described above, this disk reproducing apparatus has a mechanism for moving the turntable 12 in the vertical direction. However, since this mechanism occupies a large space in the cabinet 1, it is not suitable for realizing a compact disc reproducing apparatus.

Therefore, a disk reproducing apparatus has been developed in which a tray accommodating a disk drive mechanism such as a turntable or a disk motor together with a disk can be taken in and out of a cabinet. By providing a means for mounting the disk on the turntable in a fixed state, the disk reproducing apparatus does not require a disk clamping mechanism or the like in the cabinet, and can reduce the thickness of the apparatus.

Incidentally, it is important for a disk reproducing apparatus to prevent disturbance in disk reproduction even when a slight external shock is applied. In particular, it is an essential condition that a disk reproducing apparatus of a type mounted on an automobile can withstand a considerable impact. FIG.
In addition, the disk reproducing apparatus shown in FIG. 18 can block most of the vibration transmitted from the cabinet to the mechanical unit by supporting the mechanical unit on the cabinet via a damper, and if the mechanical unit vibrates, However, since the disk drive mechanism and the pickup are supported by a common base, there is no need to worry about large disturbances in disk reproduction. However, in the case of a disk reproducing apparatus in which the disk drive mechanism is fixedly attached to the tray, the vibration of the tray is transmitted to the disk drive mechanism as it is, so that a positional displacement between the disk and the pickup that cannot be ignored is caused, There is a danger of inducing data read failure.

[0009] Such disk reproduction failure caused by vibration is less in the disk reproducing apparatus in which both the disk drive mechanism and the pickup are supported in the tray than in the apparatus in which only the disk drive mechanism is supported in the tray.

However, in a disk reproducing apparatus in which both a disk drive mechanism and a pickup are supported on a tray, a circuit board on the cabinet side and a circuit board on the tray side must be connected through a long flexible cable having a large number of signal lines. . For this reason, when the tray is ejected from the cabinet, the flexible cable exposed to the outside becomes an antenna and becomes a source of radiated noise (unnecessary radiation), which affects external devices (eg, a host computer) due to the noise. .

Generation of unnecessary radiation is caused by electric energy leaking from an oscillator in a circuit for generating a clock for reading digital data from a disk. In recent years, there has been a demand for a disk reproducing apparatus capable of reading digital data from a disk at a speed twice, four times or more higher than a standard reading speed. Also tend to increase. As described above, as the clock frequency of the clock generation circuit increases, high-frequency electric energy becomes unnecessary radiation and leaks easily.

When the circuit board on the cabinet side and the circuit board on the tray side are connected by a flexible cable, it is necessary to secure a storage space for the flexible cable when the tray is stored in the cabinet, and the depth dimension is large. turn into.

[0013]

As described above, in the disk reproducing apparatus in which the turntable and the disk motor are mounted on the tray, external vibrations are transmitted to the turntable and the disk motor through the tray. For this reason, the read position on the disk is shifted by the pickup, and the operation reliability may be greatly impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a disk reproducing apparatus capable of stabilizing a disk reproducing operation against disturbance vibration at the same time as downsizing (thinning) the apparatus. The purpose is.

[0015]

According to the present invention, there is provided a disk reproducing apparatus comprising: a cabinet;
A tray for storing a disc to be played,
A tray supported on the cabinet so as to be out of the cabinet, and a motor unit comprising a motor for driving the turntable and the turntable for securing the disc housed in said tray, said disc Read data recorded in
Pickup and the pickup
A mechanical unit including a mechanism for movably supporting the tray , and the tray being ejected from the cabinet.
The motor unit on the tray when
A first holding section for holding the tray and the cabinet.
When the motor unit is stored in the
A second holding unit for holding the tray in the cabinet, transferring the motor unit held in the tray to the mechanical unit when inserting the tray into the cabinet, and moving the tray in the cabinet. And a transfer means for transferring the motor unit held by the mechanical unit to the tray when discharging the paper from the tray .

[0016]

According to the present invention, when the tray is discharged from the cabinet, the motor unit is held by the first holding portion of the tray, and when the tray is stored in the cabinet, the motor unit is moved to the mechanical chassis. It is held by the second holding unit. When the tray is inserted into the cabinet, the transfer unit transfers the motor unit held by the first holding unit to the second holding unit on the mechanical chassis, and discharges the tray from the cabinet. The motor unit held by the second holding unit is transferred to the first holding unit.

Therefore, according to the present invention, the motor unit is mounted on the tray when the tray is discharged.
There is no need to provide a disk clamp mechanism in the cabinet, which makes it possible to reduce the size (thinning) of the device. At the same time, by holding the motor unit on the mechanical chassis side when storing the tray, the motor unit can be used as a pickup or other mechanism. Together with the structure on the unit, the cabinet is supported by a vibration-proof structure via a shock absorbing member, for example. Therefore, it is possible to stabilize the disk reproducing operation against disturbance vibration.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall structure of a disk reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

As shown in these figures, this disk reproducing apparatus is roughly divided into a mechanical unit 100, a motor unit 200, a tray 300, and a cabinet 40.
It consists of 0.

The mechanical unit 100 has a chassis 100a on which various components are mounted. A pair of guide shafts 101, 101 are supported on the chassis 100a in parallel with each other. One end of each of the guide shafts 101 penetrates the guide shaft support 100b (shown in FIG. 2) and protrudes to the front side. The tips of the guide shafts 101, 101 projecting from the guide shaft support 100b are sharpened in a substantially conical shape. Each guide shaft 101,
A pickup 102 is bridged and supported between 101. Pickup 102 is each guide shaft 1
01 and 101 can be moved in the directions of arrows XY.

The mechanical unit 100 has a pair of lock levers 103, 103 and a pair of guide projections 104, 104. Each of the lock levers 103 has a hook 103b at the front end thereof. The lock levers 103, 103 are rotatably supported on the chassis 100a via rotating shafts 103a, 103a fixed to the chassis 100a. Each of the lock levers 103 is connected to each other's hook 10.
The springs 107 and 107 receive pressure in the rotation direction to reduce the distance between the springs 3b and 103b. Each of the guide projections 104 has a pair of claws 104a, 104a divided into two branches. Each nail 104a,
Each of 104a has a tapered surface at the upper and left and right end portions.

Each corner of the chassis 100a has four
Are mounted. The damper rubbers 105 are for blocking and attenuating the vibration transmitted from the cabinet 400 to the chassis 100a. A feed motor 106 for driving the pickup is mounted on the chassis 100a.

When the tray 300 is discharged from the cabinet 400, the motor unit 200
0 are held in the two depressions 300a, 300a. When the tray 300 is housed in the cabinet 100, the motor unit 200
Of each guide shaft 101, 101, each lock lever 1
03, 103 and each of the guide projections 104, 104 are held by a holding section.

The tray 300 has two recesses 300 a for holding the motor unit 200 and a front panel 3.
01 and a shutter 302. A plurality of guide pins 304, 304 are provided on each reinforcing plate 303 of the tray 300.
Are provided to protrude. These guide pins 304,
304 is inserted into a guide groove (not shown) provided on each side wall of the cabinet 400. These guide pins 3
The tray 300 can move in the direction of the arrow XY by the engagement of the guide grooves
You can get in and out from zero.

The shutter 302 has guide projections 302a on both sides, respectively. Each guide protrusion 302
a and 302a each form a side wall of the tray 300;
Guide grooves 303a, 303a of the two reinforcing plates 303, 303
Has been inserted. These guide projections 302a, 302
a and the guide grooves 303a, 303a allow the shutter 302 to move the motor unit 2 held on the tray 300.
00 and the motor unit 200
Can be moved in the direction of the arrow XY between the second position exposing the upper surface of the.

The two springs 30 are provided so that the shutter 302 always moves in the direction of arrow X (the direction from the second position to the first position).
2c and 302c. When the tray 300 is ejected from the cabinet 400, the force of the springs 302c, 302c
2 serves to maintain the first position covering the upper surface of the motor unit 200. When the tray 300 is in the first position,
Individual locking members 305, 305 provided on the reinforcing plates 303, 303 respectively correspond to individual locking holes 302b, 302 provided on both side surfaces of the shutter 302, respectively.
Fits in b. As a result, the shutter 302
, The opening and closing of the shutter 302 is locked. Therefore, a disadvantageous act of removing the motor unit 200 from the tray 300 by the user opening the shutter 302 by hand is prevented. The details of this shutter lock mechanism will be described later.

As shown in FIG. 2, the cabinet 400 is provided with a tray lock device 110 for fixing the inserted tray 300 at a predetermined position in the cabinet 400. The tray lock device 110 fixes the tray 300 at a fixed position in the cabinet 400 by coupling with the striker 110a fixed to the tray 300. Details of the tray lock mechanism including the tray lock device 110 will be described later.

A socket 531 is arranged on the inner wall of the cabinet 400. This socket 5
When the tray 300 is accommodated in the cabinet 400, the connector 31 is connected to the connector 500 attached to the tip of one reinforcing plate 303 of the tray 300. Details of the socket 531 and the connector 500 will be described later.

Next, the details of each section in the disc reproducing apparatus will be described in detail.

FIG. 3 is an exploded view of the motor unit 200.

As shown in FIG.
Is composed of a disk motor 201, a motor block 202, a turntable 203, a magnetic plate 204, two springs 205, 205, and two pins 206, 206. The disk motor 201 is a motor block 20
2 are fixed by two screws 207, 207. A turntable 203 is fixed to a rotation shaft 201a of the disk motor 201. Also, the motor block 202
, A magnetic plate 204 is fixed by two pins 206 and 206. Each of the pins 206 has a thread portion 206a in the middle of each pin, and is inserted and fixed into two screw holes 202a provided in the motor block 202. Springs 205, 205 are fitted around the pins 206, 206, respectively.
6, 206 are held between the heads 206b, 206b and the magnetic plate 204. Incidentally, the tips 206c, 206c of the pins 206, 206 project from the opposite surface of the motor block 202, respectively. The projections 206c, 20 of these pins 206, 206
6c are the lock levers 103, 10 and 10 described above, respectively.
And 3 hooks 103b, 103b.

The motor block 202 has two notches 202e, 2e for forming two spaces (guide holes) between the magnetic plate 204 and the direction in which the tray 300 is inserted and removed.
02e. These two guide holes have tray 30
When the “0” is stored in the cabinet 400, the guide projections 104 of the mechanical unit 100 are inserted.

When the tray 300 is stored in the cabinet 400, the motor block 202
The tip ends of the two guide shafts 101 (the protrusions from the guide shaft support 100b) are inserted into the Vs.
It has a groove 202b and an elliptical hole 202c. V groove 202b
Has a V-shaped cross-section so that the motor block 202 can be accurately positioned with respect to the guide shaft 101. Further, although not shown in the drawing, a taper is formed at each of the entrances of the V-shaped groove 202b and the elliptical hole 202c to facilitate the smooth insertion of each of the guide shafts 101, 101. The cross-sectional shape of the groove 202b may be any shape, such as a semicircle, as long as the guide shaft 101 can be guided to a fixed position in the groove 202b.

Further, the motor block 202 has two concave portions 300 provided on the tray 300 at both ends thereof.
a, leg portions 202d, 202d to be fitted into 300a. These legs 202d, 202d
The motor unit 200 can be held at a predetermined position on the tray 300 by being fitted into each of the recesses 300a.

FIG. 4 shows legs 202d, 202d and recess 3
It is a figure which shows the connection relationship with 00a and 300a. FIG.
4A shows a state immediately before the motor block 202 is held on the tray 300, and FIG.
Indicates a state held on the tray 300. Further, the left figure is a view of this part viewed from the front side of the apparatus, and the right figure is a view viewed from the side of the apparatus.

As shown in FIG. 3, the recess 300a of the tray 300 has a leg 202 inserted therein from above.
It has four tapered surfaces for guiding d to a fixed position in the recess 300a. On the other hand, the leg 20 of the motor block 202
2d has four tapered surfaces at the distal end that come into contact with the respective tapered surfaces of the recess 300a. The plane size of the opening surface and the bottom surface of the recess 300a is larger than the plane size of the leg 202d. The difference between these plane sizes is
It is necessary as a margin when fitting d and 202d into the recesses 300a and 300a. Each leg 202d, 20
When the 2d is fitted into each of the recesses 300a, 300a, the legs 202d, 2d are guided by the corresponding tapered surfaces even if their positional relationship is slightly shifted.
02d slides down to a fixed position in the recesses 300a, 300a.

The motor unit 200 is
When held on the 0 side, as shown in FIG. 4 (a), each leg 202d, 202d
It is placed at a position slightly floating from the bottom surface of Oa and 300a.
Therefore, the tray 300 and the motor unit 200 are in a non-contact state, and vibration is not transmitted from the tray 300 to the motor unit 200.

Next, referring to FIG.
Will be described in detail. In the figure, (a) shows the disk 6
00 before being placed on the turntable 203,
(B) shows a state after the disk 600 has been placed on the turntable 203.

The turntable 203 has a disk 600
Chuck 203 coupled to the center hole 600a of the disk
a. A plurality of balls 203b are embedded in the outer periphery of the disc chuck 203a so as to partially expose the balls 203b. These balls 203b... Can be moved between the position shown by the solid line and the position shown by the dotted line in the enlarged view.
Is held within. Each of the balls 203b receives a pressure from a spring (not shown) arranged in the disc chuck 203a so as to be pushed out from the center of the disc chuck 203a toward the outer periphery.

When the disc 600 is placed on the turntable 203, each ball 203b contacts the inner wall of the center hole 600a of the disc 600 and receives pressure from the outside to reach the position shown by the dotted line in the disc chuck 203. Move once. When the disc 600 is placed at a fixed position on the turntable 203, each of the balls 203b is pushed out again by the force of the spring. As a result, as shown in FIG. 5B, the disk 600 is fixed on the turntable 203 so as to be pressed from above by the balls 203b.

Next, details of the lock mechanism of the shutter 302 will be described with reference to FIG. Here, FIG. 6A shows the locked state, and FIG. 6B shows the unlocked state.

The lock members 305 provided on the reinforcing plates 303 of the tray 300 are made of, for example, molded elastic members. As shown in the figure, one end of the lock member 305 is fixed on the tray 300 with a screw 306. Also, the lock member 305
Has, at the other end, a projection 305b that fits into a lock hole 302b provided in the shutter 302. In addition, the lock member 305 has a curved portion 305a which is folded in a U-shape at an intermediate portion thereof.

Next, the operation of the shutter lock mechanism will be described. When the tray 300 is ejected from the cabinet 400, as shown in FIG.
The protrusion 305b of the fifth lock hole 302 of the shutter 302
Fit to b. Thus, the opening and closing of the shutter 302 is locked.

To release the lock, the lock member 30
5, the tip of the projection 305b is pressed in the direction of arrow A, and the lock member 305 is elastically deformed until at least the surface c of the projection 305b comes into contact with the surface of the lock hole 302. After the surface c of the projection 305b comes into contact with the surface of the lock hole 302b, if the shutter 302 is moved in the arrow Y direction, the projection 305b is elastically deformed by the lock member 305.
Is pushed inside the tray 300. As a result, FIG.
As shown in (b), the protrusion 305b of the lock member 305
Is released from the lock hole 302b, and the lock is released.

Next, details of the tray lock mechanism will be described. FIG. 7 is a diagram showing the configuration of the tray lock mechanism.

Referring to FIG.
A tray lock device 110 a provided in the tray 0 is a striker fixed to the tray 300. The tray lock device 110 is fixed on the slider 120 via a mounting portion 120a. The slider 120 is rotatably supported by the cabinet 400 via a rotation shaft 450. The rotation range of the slider 120 is limited by the pin 460 fixed to the cabinet 400 and the elongated hole 120c provided in the slider 120. One end of a spring 700 is connected to an end of the slider 120. The other end of the spring 700 is a cabinet 400
Is supported by a pin 470 fixed to the pin. That is,
A spring 700 is applied to the slider 120 to rotate the slider 120 about the rotation axis 450 in the direction of the arrow X.
More. Since the rotation range of the slider 120 is limited by the pin 460 and the elongated hole 120c, the slider 120 normally maintains the state shown in FIG.

FIG. 7B shows that a large impact is applied to the tray 300.
Shows the state when it is added to the tray lock device 110 through the. At this time, if the impact having a magnitude exceeding the tensile force of the spring 700 is applied to the tray lock device 110,
, The spring 700 momentarily changes to L′−
The length L extends, and the slider 120 rotates by the angle θ. As a result, the peak value of the impact force applied to the tray lock device 110 decreases, and the tray lock device 110
Can be prevented from being damaged. In this case, if the slider 120 is configured to be in surface contact with the cabinet 400, the shock absorption can be further enhanced by the friction effect. Further, a member having a high frictional resistance such as rubber may be arranged between the slider 120 and the cabinet 400. FIG. 8 is a diagram showing details of the tray lock device 110. In the figure, (a) shows the state of the tray lock device 110 when unlocked, and (b) shows the state of the tray lock device 110 when locked.

As shown in the figure, the tray lock device 110 has a lock slider 131 which is movable in the directions of arrows XY. This rock slider 131
, A pressure in the direction of arrow Y is applied from a spring (not shown). When unlocking, the lock slider 131 is at the position shown in FIG. The lock slider 131 has a pair of arms 132 at one end thereof for holding a tip portion of the striker 110a. A guide groove 133 is provided on the surface of the lock slider 131. The guide groove 133 has a member 1 rotatably supported by the main body 134 of the tray lock device 110.
35 pins 136 are inserted. A force is applied to the member 135 from a spring (not shown) to rotate the member 135 in the direction of arrow R.

Next, the operation of the tray lock device 110 will be described. When locking the tray 300, first, the tip 141 of the striker 110a is
To the opposing surface 151. The lock slider 131 is pushed into the tray lock device 110 (main body 134) by the pressure from the striker 110a. As the lock slider 131 is pushed into the main body 134, each of the arms 132, 132 rotates in a direction in which the distance between them is reduced. At the same time, the guide groove 133
The pin 136 inserted into the P1 moves sequentially from the position P1 to the positions P2 and P3. Tray 300 is cabinet 40
At the point in time when the striker 11 has been inserted to the limit within 0, as shown in FIG.
0a is completed. At this time, the pin 136 is at the position P4. Thereafter, when the user removes his / her finger from the tray 300, the lock slider 131 is turned on by a spring (not shown).
The pin 136 moves slightly to the position P5 by slightly returning in the direction of the arrow Y by the force of. Thereby, the tray lock is completed.

To release the tray lock, the tray 300 is pushed in the direction of arrow X. As a result, the pin 136 moves from the position P5 to the position P6. Pin 136 is P
When the finger is released from the tray 300 at the position of 6, the lock slider 131 is flipped out in the direction of arrow Y by the force of a spring (not shown). This causes the arms 132, 132 to rotate in a direction to increase the distance from each other, and at the same time, the striker 110a is pushed out in the arrow Y direction. At the same time, the pin 136 returns from the position P6 to the original position P1 through the position P7. Thereby, the lock of the tray 300 is released.

Next, the socket 531 and the connector 500 will be described in detail with reference to FIG. As shown in the figure, the connector 500 attached to the tray 300 has a pair of electrode plates 502 and 504 each having the property of a leaf spring. Each of the electrode plates 502 and 504 is fixed to stand upright on the surface of the connector 500 such that the surfaces face each other. Each of the electrode plates 502 and 504 is connected to a power supply line (plus / minus pole) for supplying drive power to the disk motor 201. Also, each of the electrode plates 502, 50
Bending portions 503 and 505 having curved shapes that are opposite to each other are provided at the distal end of 4. When the socket 531 and the connector 500 are not connected, each bent portion 503,
Numerals 505 are in contact with each other at their intermediate portions while being pressed against each other by their own elasticity. Socket 531
Has a pair of contacts 532, 534 that are respectively joined to the pair of electrode plates 502, 504 described above. Each contact 5
Each of 32 and 534 is connected to a power supply line (positive pole / minus pole) leading to a power supply circuit (not shown) in the cabinet 400. The socket 531 is provided with an insulating protrusion 535. When the tray 300 is inserted into the cabinet 400, the insulating protrusion 535
Bent portion 50 of each electrode plate 502, 504 of connector 500
3 and 505, between the electrode plates 502 and 504, the leading ends of the bent portions 503 and 505 are guided to the respective contacts 532 and 534 of the socket 531 while pushing and expanding the electrode plates 502 and 504, respectively.

When the tray 300 is pulled out of the cabinet 400, the tips (bent portions 503, 505) of the electrode plates 502, 504 of the connector 500 are separated from the contacts 532, 534 of the socket 531, respectively.
01 is no longer supplied with driving power. Disk motor 2
01 for a while after the supply of drive power to
The disk motor 201 keeps rotating due to inertia.
During this time, the bent portions 503 and 505 of the respective electrode plates 502 and 504 of the connector 500 are not in contact with each other due to the insulating protrusions 535. Thereafter, when the tray 300 is further pulled out, the bent portions 503 and 505 of the electrode plates 502 and 504 of the connector 500 are separated from the insulating protrusions 53.
Deviate from 5. As a result, each electrode plate 5 of the connector 500
The bent portions 503 and 505 of the 02 and 504 come into contact with each other at their respective intermediate portions, and the power supply line leading to the disk motor 201 is short-circuited. At this moment, a back electromotive force is generated in the disk motor 201 which has been rotating by inertia. Due to this back electromotive force, a force for braking the rotation of the disk motor 201 is generated, and the disk motor 201
Is forcibly stopped. Therefore, when the tray 300 is completely pulled out of the cabinet 400, the disc motor 201 is already in a stationary state. Therefore, when the disc 600 is taken out of the tray 300, the disc reproducing device may be damaged. Can be prevented.

The disc reproducing apparatus has no other line for electrically connecting the tray side and the cabinet side except for the line for supplying power to the disc motor 201 described above. That is, since electrical components other than the disk motor 201 are not mounted on the tray 300, the electrical connection between the tray side and the cabinet side is established from the power supply circuit arranged in the cabinet 400 to the disk motor 201. Only a line for supplying drive power is required. Therefore, the use of a flexible cable or the like becomes unnecessary. Accordingly, it is not necessary to secure a storage space for the flexible cable in the cabinet 400 when the tray 300 is stored in the cabinet 400, and the cabinet 400 can be downsized.

Further, the disk motor 20 is supplied from the power supply circuit.
The line for supplying driving power to the
Is cut off when being discharged from the cabinet 400, so that there is no fear that radiation noise (unwanted radiation) is transmitted from this power supply line. That is, cabinet 4
In 00, a circuit board on which a clock generator for generating a clock for reading digital data is mounted as a source of unnecessary radiation, but the power supply line is disconnected when the tray 300 is discharged from the cabinet 400. Therefore, there is no fear that radiation noise (unnecessary radiation) is generated from the power supply line.

Next, the overall operation of the disc reproducing apparatus will be described.

FIG. 2 shows that the tray 300 is a cabinet 400.
It is a figure showing a state when it is discharged from. At this time, the upper surface of the motor unit 200 held by the tray 300 is covered by the shutter 302. At this time, the shutter 302 is locked by the shutter lock mechanism shown in FIG.

FIG. 10 is a view of FIG. 2 as viewed from the front side of the apparatus. As shown in FIG.
0 is held in the recesses 300a, 300a of the tray 300. The two magnets 306 fixed to the tray 300 draw the magnetic plate 204 of the motor unit 200 downward, so that the motor unit 200
Is stably held on the tray 300.

It should be noted here that the mechanical unit 10
0 is a relative position (height) relationship between the motor block 202 and each of the guide shafts 101, 101 and the guide projections 104, 104. In the state shown in FIG.
Each guide shaft 101, 101 and each guide protrusion 10
The height of each of the motor blocks 202 and 104 is
Of the V-shaped groove 202b, the elliptical hole 202c, and each space (hole) formed between the motor block 202 and the magnetic plate 204.

Thereafter, the tray 300 is manually pushed in the direction of the arrow X. FIG. 11 is a diagram illustrating a state where the tray 300 is being loaded. As shown in FIG.
Is pushed into the cabinet 400 to some extent, the surfaces of the tray guides 401, 401 arranged on both sides of the cabinet 400 come into contact with the projections 305b, 305b of the lock members 305, 305 of the shutter lock mechanism, and these The protrusions 305b, 305b are pushed into the tray 300, respectively. Thereby, the shutter 302
Is unlocked.

On the other hand, each of the projections 302a provided on both sides of the shutter 302 is connected to a slider (not shown) supported via a spring (not shown) inside each tray guide 401 during loading. Fit. Then, when the tray 300 is pushed down to the position of FIG.
The spring force is applied to the shutter 302 through the slider.
And the shutter 302 is opened. FIG.
In, the shutter 302 is fully opened, and the motor unit 200 is exposed.

Thereafter, the tray 300 is moved to the cabinet 40
When it is further pushed into the inner portion 0, the tip portions (claws 104a, 104a) of the guide projections 104, 104 of the mechanical unit 100 are formed between the motor block 202 and the magnetic plate 204, as shown in FIG. Into two spaces (holes). When the guide projections 104, 104 enter the hole, the difference in height between the guide projections 104, 104 and the hole is determined by the tip portions (claws 104a,
104a) is smoothly corrected by the tapered surface provided on the upper surface. Thereby, the motor unit 200 is slightly lifted from the recesses 300a of the tray 300.

Incidentally, at the time of FIG. 12, each of the guide shafts 101 is still in the V groove 2 of the motor block 202.
02b and the oval hole 202c are not inserted.

Thereafter, the tray 300 is moved to the cabinet 40
As shown in FIG. 13, when the guide shafts 101 and 101 are further pushed into the inside of the motor block 202, the V-groove 202b and the elliptical hole 202c of the motor block 202
Respectively. At this time, each guide shaft 10
The upper ends of 1, 101 are V-grooves 202 of the motor block 202.
b and a position slightly higher than the upper ends of the elliptical holes 202c. Accordingly, each of the guide shafts 101, 101 is connected to the V-groove 202b
As shown in FIG. 14, each leg 202d of the motor block 202 is inserted into the tray 3c.
00 is further elevated from each of the recesses 300a, 300a.

On the other hand, as shown in FIG. 13, two pins 206, 206 protruding from the upper surface of the motor block 202.
Contacts the first cam surfaces of the hooks 103b, 103b of the two lock levers 103, 103 provided on the mechanical unit 100, and applies pressure to the lock levers 103, 103. Thereby, each lock lever 103, 10
Reference numeral 3 rotates around the rotation shafts 103a, 103a in the directions of the arrows. At this time, the striker 110a provided on the tray 300 is
Start getting inside 0.

Thereafter, the motor block 202 is moved to the tray 3
00, the legs 202d, 202 of the motor block 202 are pushed by the two end surfaces 310, 310.
d is the X in each recess 300a, 300a of the tray 300.
It is moved to the limit position in the direction. As shown in FIG. 4, the length in the XY direction of the concave portion 300a is equal to the X-Y length of the leg portion 202d.
It is set larger than the length in the Y direction. Therefore, by pushing the motor block 202 in the arrow X direction on each end surface 310, 310 of the tray 300, each leg 2
02d and 202d can be moved by a certain distance in the direction of arrow X in each of the recesses 300a and 300a.

By the movement of the motor unit 200,
The rotation angle of each lock lever 103, 103 increases.
Then, when each of the lock levers 103, 103 is rotated to a predetermined angle, as shown in FIG.
00, the two pins 206, 206 projecting from the upper surface
Hooks 103b, 10 of each lock lever 103, 103
3b, jumping over the first cam and moving on to the second cam.
As a result, each of the lock levers 103, 103 is rotated in the opposite direction by the pulling force of the spring 107, 107, respectively. This lock lever 103, 1
The motor unit 200 is pulled toward the mechanical unit 100 by the rotational force of 03. As a result, the motor unit 200 is moved to a position where the rear wall surface 210 contacts the end surface 111 of the guide shaft support 100b. Thus, the positioning of the motor unit 200 in the X-Y direction is achieved.

At this time, the motor unit 200
Each guide shaft 101, 101 and each lock lever 10
3 and 103 are held by the mechanical unit 100 while being sandwiched from above and below. Thereby, the positioning of the motor unit 200 in the height direction is achieved.

At this time, the striker 110a enters the lock-on position in the tray lock device 110. The tray lock device 110 is a striker 11
After Oa reaches the lock-on position, the striker 110a is slightly pushed back by the force of a spring (not shown) incorporated therein. Therefore, as shown in FIG. 16, the tray 300 is finally locked at a position slightly returned in the Y direction from the state of FIG. At this time, the motor unit 200 has the lock levers 103, 1
03, the movement in the direction of the arrow Y is restricted.
A slight gap is formed between the end face 310 and the end face 310. Thus, the tray 300 and the motor unit 200 are brought into a non-contact state. The state in which the tray lock has been completed will be described in more detail with reference to FIG. When the tray lock is completed, the motor block 202
1 and 101 are held on the mechanical chassis 100 side while being inserted into the V-shaped groove 202b and the oval hole 202c. As a result, the motor block 202 is set to the specified height. The V-groove 20 provided in the motor block 202
2c has a V-shaped cross section. Therefore, this V
By receiving one of the guide shafts 101 in the groove 202c, the motor block 202 is set at a predetermined position in the lateral direction.

On the other hand, each of the guide projections 104, 104 descends in each space (hole) formed between the motor block 202 and the magnetic plate 204, and moves the magnetic plate 204 to each of the springs 2.
Push down against the force of 05,205. Then, the repulsive force of each spring 205, 205
Through the motor block 202 and acts as a force to pull the motor block 202 downward. As a result, the motor block 202
It is firmly supported on 1,101.

Further, at this time, each leg 202 d of the motor block 202 is
00a, 300a, the tray 30
0 and the motor block 202 are in a non-contact state. Therefore, the vibration is not transmitted to the motor unit 200 through the tray 300.

After the transfer of the motor unit 200 to the mechanical unit 100 is completed in this manner, the pickup 102 moves in the direction of the arrow Y from a position off the plane of the data area of the disk 600. In FIG. 15, the line indicated by M indicates the position of the outermost track in the data area on the disk 600. Due to the movement of the pickup 102 in the direction of the arrow Y, when the shaft holding portion 102a of the pickup 102 hits the end face of the guide shaft support portion 100b, the movement of the pickup 102 is stopped, and the reproducing operation is started. Also during the period of unloading the tray 300, the pickup 102 waits at a position outside the data area of the disk 600, similarly to the time of loading.

As described above, in this disk reproducing apparatus,
When the tray 300 is moved in and out of the cabinet 400, the pickup 102 waits at a position off the plane of the data area of the disk 600. Thereby, when the tray 300 is taken in and out of the cabinet 400, the danger that the pickup 102 comes into contact with the data area of the disc 600 and destroys the recorded data can be eliminated.

Further, in this disk reproducing apparatus, when the motor unit 200 is transferred to the mechanical unit 100,
The motor unit 200 once moves obliquely upward along the tapered surfaces of the guide projections 104, 104, and then returns to the parallel state again. Therefore, the motor unit 200
When the disks return to the parallel state, the disk 600 held by the motor unit 200 may be momentarily tilted due to inertia. However, when the tray 300 is moved in and out of the cabinet 400, the pickup 102 is
The pickup 102 and the data area of the disk 600 do not come into contact with each other even when the disk 600 is tilted by making the disk 600 stand by at a position off the plane of the data area.

When the motor unit 200 is held by the mechanical unit 100, each lock lever 103,
103 holds the motor unit 200 softly by the elastic force of the springs 107 and 107. For this reason, a large impact is applied to the device, and the motor unit 200
Lock lever 10
There is no worry that 3,103 will be destroyed. At this time, the moving distance of the motor unit 200 to the tray side is determined by the end face 310 of the tray 300 by the lock levers 103 and 1.
03 can be limited to a range where pullback is possible.

When the tray 300 is to be discharged from the cabinet 400, the tray 300 is pushed in the direction of the arrow X with a finger. As a result, the lock of the tray lock mechanism is released, and the tray 300 is pulled out slightly forward. Thus, the tray 300 is automatically pulled out by a small amount, so that the user can put his hand on the tray 300 and pull it out in the arrow Y direction. As shown in FIG. 4, the legs 202d of the motor unit 200 are
00 are placed in a floating state or in contact with each other. Therefore,
By pulling out the tray 300 in the direction of the arrow Y, the motor unit 200 is separated from the holding position on the mechanical unit 100 side, and the holding position of the tray 300 (the recess 300
a, 300a).

By the way, each guide shaft 101, 10
The positions of both end surfaces of the guide shaft support portion 100b supporting one end of the pickup unit 102 are the pickup 102 and the motor unit 2
It is important for accurate alignment with 00. For example, if the disc is a CD (compact disc), the TOC recorded on the inner circumference side of the disc 600 first
It is necessary to read (Table Of Content) information. The TOC information is recording information (index information) of data recorded on the disk 600.

In this disc reproducing apparatus, when the pickup 102 moves to the end in the direction of the arrow Y and the shaft holding portion 102a of the pickup 102 hits the end face of the guide shaft support portion 100b, the reading position of the pickup 102 is The guide shaft support 100b is aligned with the TOC area provided on the innermost track side on the disk 600.
Are optimally selected.

The hook 1 of each lock lever 103, 103
03a and 103a are springs 10 when the tray is inserted.
Although the pulling of the motor unit 200 into the mechanical unit 100 by the forces of 7, 107 has already been described, the motor unit 200 is pushed out to the tray 300 by the force of the springs 107, 107 when the tray is ejected. Thus, the transfer of the motor unit 200 at the time of discharging the tray can be stably performed. In the disc reproducing apparatus of the present embodiment, the guide shaft 101 of the pickup 102,
101 is also used as a guide unit and a holding unit for the motor unit 200. Therefore, there is no need to provide a guide mechanism dedicated to the motor unit, and the size of the apparatus can be reduced.

Further, in the disk reproducing apparatus of this embodiment, the motor unit 200 is accurately positioned and fixed relative to the mechanical unit 100 in all directions of up, down, left, right, front and back. Therefore, there is no restriction on the attitude of the disk reproducing apparatus, and an apparatus for reproducing a disk in a standing state can be realized.

[0081]

As described above, according to the disk reproducing apparatus of the present invention, since the motor unit is mounted on the tray when the tray is ejected, there is no need to provide a disk clamping mechanism in the cabinet, and the apparatus is compact. By holding the motor unit on the mechanical chassis side when storing the tray,
The motor unit, together with the pickup and other structures on the mechanical unit, is supported in the cabinet by a vibration-proof structure via, for example, an impact absorbing member. Therefore, it is possible to stabilize the disk reproducing operation against disturbance vibration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the disc reproducing apparatus of FIG. 1;

FIG. 3 is an exploded perspective view showing a configuration of a motor unit in FIG.

FIG. 4 is a cross-sectional view showing a coupling relationship between a leg provided on the motor block of FIG. 3 and a recess of a tray.

FIG. 5 is a diagram showing a configuration of a turntable in the motor unit of FIG. 3;

FIG. 6 is a plan view illustrating a configuration of a shutter lock mechanism.

FIG. 7 is a plan view illustrating a configuration of a tray lock mechanism.

FIG. 8 is a plan view showing a configuration of a tray lock device in the tray lock mechanism of FIG. 7;

FIG. 9 is a perspective view illustrating a configuration of an electrical connection portion between the tray and the cabinet.

FIG. 10 is a sectional view of the disk reproducing apparatus of FIG. 2 as viewed from the front side.

FIG. 11 is a plan view showing a state of the disc reproducing apparatus during loading.

FIG. 12 is a cross-sectional view of the state of the disc reproducing apparatus during loading as viewed from the front side.

FIG. 13 is a plan view showing the state of the disc reproducing apparatus during the transfer of the motor unit to the mechanical unit.

FIG. 14 is a sectional view of the disc reproducing apparatus of FIG. 13 as viewed from the front side.

FIG. 15 is a plan view showing a state of the disk reproducing device when the transfer of the motor unit to the mechanical unit is completed.

FIG. 16 is a plan view showing a state of the disc reproducing apparatus when loading is completed.

FIG. 17 is a perspective view showing a conventional disk reproducing apparatus.

FIG. 18 is a cross-sectional view for explaining the operation of the conventional disk reproducing device shown in FIG.

[Explanation of symbols]

100: mechanical unit, 100a: chassis, 100b
... Guide shaft support, 101 ... Guide shaft, 102 ...
Pickup 103 Lock lever 103a Rotating shaft 103b Hook 104 Guide protrusion 107 Spring 110 Tray lock device 110a Striker 200 Motor unit 201 Disk motor 202 Motor block 202b: V groove, 2
02c: oval hole, 202d: leg, 203: turntable, 204: magnetic plate, 205: spring, 206:
Pin, 300, tray, 300a, recess, 302, shutter, 302b, lock hole, 305, lock member,
400: cabinet, 600: disk.

Claims (14)

(57) [Claims] 1. A cabinet and a tray for storing a disk to be played,
A tray supported by the cabinet so that it can be taken in and out of the cabinet, a motor unit including a turntable for fixing the disc stored in the tray, and a motor for driving the turntable; and the disc. To read the data recorded in the
The pickup and the pickup along the disc.
A mechanical unit including a mechanism for movably supporting the tray , and when the tray is being ejected from the cabinet,
A first for holding the motor unit on the tray;
And when the tray is stored in the cabinet,
To hold the motor unit on the mechanical unit
A second holding portion, when inserting the tray into the cabinet, the bets
Wherein said motor unit held by the rate Mekayuni'
Transferred to preparative, and, when discharging the tray from within the cabinet, the disk reproducing apparatus characterized by comprising a transfer means for transferring said motor unit held by said mechanical unit to the tray. 2. The disc reproducing apparatus according to claim 1, wherein when the disc is reproduced, the tray and the mechanical unit are reproduced.
Tsu DOO disk reproducing apparatus, characterized in that is in a non-contact state. 3. The disk reproducing apparatus according to claim 1, wherein said mechanical unit is supported by said cabinet via an elastic member. 4. The disk reproducing apparatus according to claim 1, wherein, when reproducing the disk, the motor unit is held by the second holding unit in a non-contact state with the tray. Playback device. 5. The disc reproducing apparatus according to claim 1, wherein a position at which the first holding unit holds the motor unit and a position at which the second holding unit holds the motor unit are the turns. A disc reproducing apparatus characterized in that the discs are different from each other in a thickness direction of the disc held on a table. 6. The disk reproducing apparatus according to claim 5, wherein a distance in a thickness direction of the disk between the motor unit and the pickup held by the first holding unit is L1, and the distance by the second holding unit. A disc reproducing apparatus characterized by satisfying a relationship of L1> L2 when a distance in a thickness direction of the disc between the held motor unit and the pickup is L2. 7. The disc reproducing apparatus according to claim 1, wherein the transfer means comprises: a lever rotatably attached to the mechanical unit; and an elastic force applying means for elastically applying a force in one rotation direction to the lever. Means, a first cam provided on the lever, wherein the tray is inserted into the first holding portion while the tray is inserted from a first position in the cabinet to a second position deeper than the first position. A first cam for rotating the lever in a direction opposite to a direction of rotation by a force applied from the elastic force applying means while being in contact with the held motor unit. Disc playback device. 8. The disc reproducing apparatus according to claim 7, wherein the second cam provided on the lever, wherein the tray is inserted to a third position deeper than the second position. And a second cam for pulling the motor unit to the second holding portion by the force of the elastic force applying means while being in contact with the motor unit. 9. A disc reproducing apparatus according to claim 7 , wherein said transfer means is fixed to said mechanical unit with a guide hole provided in said motor unit along a direction in which said tray is taken in and out. A guide projection, which is inserted into the guide hole of the motor unit held by the first holding portion of the tray when the tray is inserted into the cabinet, and the motor unit is moved to the second position. And a guide projection for guiding to the holding portion. 10. The disc reproducing apparatus according to claim 9, wherein the guide projection sandwiches and holds the motor unit between the lever and the lever while the motor unit is held by the second holding portion. A disc reproducing apparatus characterized in that: 11. The disc reproducing apparatus according to claim 9, wherein the guide projection is configured to contact with an inner surface of the guide hole of the motor unit when the tray is inserted into the cabinet. A disk reproducing apparatus having a first taper for separating the motor unit from the first holding unit and guiding the motor unit to the second holding unit of the mechanical unit. 12. The disc reproducing apparatus according to claim 11, wherein the guide protrusion has a second taper at a distal end for correcting a relative displacement between the guide protrusion and the guide hole. Characteristic disk playback device. 13. The disc reproducing apparatus according to claim 1, wherein the guide shaft is a part of the mechanical unit, and the pickup can be moved in a radial direction of the disc stored in the tray. A guide shaft for supporting, a shaft support portion for supporting one end of the guide shaft, a first surface for forming the second holding portion, and the pickup in one movement direction At the end position of
A disk support device comprising: a shaft support having a second surface in contact with the pickup. 14. The disk reproducing apparatus according to claim 13, wherein when the pickup is in contact with the second surface of the shaft support, the reading position of the pickup is an innermost peripheral portion on the disk. Characterized by being in a TOC area (an area in which index information of data recorded on the disc is recorded) set in the disc reproducing apparatus.