JPH0548256Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a disk player.

Conventional technology In a general compact disc player, a compact disc is clamped to the top of a turntable and rotated, an optical pickup moves on the bottom of the disc to play, and when playback is finished, the disc is unclamped and placed on a tray. It is supported on the top and ejected to the outside of the player.

In this player, the turntable must have a small diameter, and warpage of the disc cannot be corrected during clamping. For this reason, there has been a problem in that the reproduction characteristics may be adversely affected depending on the degree of warpage of the disk itself.

Therefore, in order to solve the above-mentioned problems, the present applicant previously proposed the name "Compact Disc Player" invented in Utility Application No. 62-68947. This means that the turntable has the same diameter as the disk, is placed above the tray facing downward, and the clamper pushes up the disk, pressing the entire surface of the disk against the turntable. , so that it is clamped with the warpage corrected.

In this type of disk player, when the disk is unclamped, the disk is lowered and placed on the tray. At this time, if the optical pickup is located at a position facing the disk, the disk may come into contact with the optical pickup and rub against each other, causing damage to the disk and the optical pickup.

Problems to be Solved by the Invention Therefore, in the above-mentioned type of disk player, it is necessary to move the optical pickup to a position where it does not hit the disk before the disk is unclamped.

The present invention was developed in response to this need, and an object of the present invention is to provide a disk player that returns an optical pickup to a standby position during disk squeezing.

Means for Solving the Problems The present invention arranges a turntable facing downward above a tray on which a disk is placed, and when a clamper moves upward, the disk is pushed up from the tray and clamped to the turntable. , an optical pick-up moves below the disk to play the disk, and a clamper moves downward to unclamp the disk and lower it to be placed on the tray. , a mover movable between a first position corresponding to the standby position of the optical pickup and a second position beyond the inner circumferential position of the disk within the movement range of the optical pickup; a spring member that biases the slider toward the first position; a mechanism that moves the slider to the second position against the spring member prior to playback of the disk; A lock mechanism that releases the lock when the disc is locked in the second position and the disc clamped to the turntable is removed from the disc player or when the power to the disc player is cut off. When the lock is released, the mover returns to the first position by the spring member, and during the return, the mover locks the optical pick-up and pushes the optical pick-up back to the standby position. It is composed of

Operation When the lock is released, the mover moves by the spring force and pushes the optical pick-up back to the standby position, so that the optical pick-up quickly returns to the standby position. This prevents the disk from colliding with the optical pickup even if the disk is unclamped and lowered.

Embodiment FIGS. 1, 2, and 3 each show the state during disk playback, and FIGS. 4, 5, and 6 each show the state when the optical pickup is restored.

In each figure, 1 is a turntable, 2 is a spindle motor, 3 is a disk clamper, 4 is a tray, and 5
is a compact disk.

The turntable 1 has the same diameter as the compact disc, and is provided above the tray 4 so as to face downward.
The clamper 3 is moved in the direction of the arrow by the clamper lifting mechanism 6.
It is lifted and lowered in the Z ₁ and Z ₂ directions.

7 is an optical pickup, one end of which is guided by a guide rod 8, the vicinity of the other end guided by a guide rail 9, and a linear motor 10 moves arrows X ₁ ,
Can be moved in _two directions.

A is a standby position, which is a position outside the outer periphery of the disk 5.

B is the movement range during reproduction, that is, the range facing the disk 5.

C is a position on the inner circumferential side of the disk within the above movement range.

Reference numeral 11 denotes a moving element, which is supported by a guide rod 8 and a guide rod 12 parallel thereto, and can be guided by these and moved in the directions of arrows X ₁ and X ₂ . The mover 11 is moved to a first position P2 shown by a two-dot chain line in FIG. 1, which corresponds to the standby position A of the optical pickup 7, or to a first position _P2 shown by a solid line in FIG. second position shown
Located on _P1 . The mover 11 has a locking portion 13 for locking the optical pickup 7 at its center, and a rack 14 on the side.

15 is a spring member, and the mover 11 is indicated by arrow X ₁
bias in the direction.

16 is a mechanism for moving the above-mentioned mover to the second position _P2 , and a gear 17 meshed with the rack 14;
and a motor 18 that rotates a gear 17.

Reference numeral 19 denotes a lock mechanism, which is integrally formed with the gear 17 and detects a cam 21 having a recess 20, a lock lever 22 having a lock pin 22a at its tip that fits into the recess 20, a plunger 23, and a disk clamp. a circuit 24, a circuit 25 for detecting a disk squeeze operation, and each circuit 2.
The plunger 23 includes a circuit 27 for controlling the drive of the plunger 23 according to the outputs from the plungers 4 and 25.

Next, the operation of the disk player having the above configuration will be explained.

Before the disk is mounted, the disk player is in the state shown in FIGS. 4, 5, and 6, except for the clamper 3.

Optical pickup 7 is in standby position A, mover 11
are respectively located at the first position _P1 . Plunger 23 is in a demagnetized state.

When the disk 5 is placed on the tray 4 and inserted into the player, the clamper elevating mechanism 6 operates,
The clamper 3 moves up and down in the direction of arrow _Z1 and pushes up the disk 5 above the tray 4. If the disk 5 is warped, the warp is corrected and the disc 5 is clamped to the lower surface of the turntable 1 as shown in FIG.

When the disk 5 is clamped, the detection circuit 24
A signal is outputted from the circuit 27, and the plunger 23 is excited via the circuit 27. As a result, the spring 28 is expanded, and the lock lever 22 is urged to rotate in the counterclockwise direction.

Also, when the disk 5 is clamped, the motor 1
8 is started, and the gear 17 rotates in the direction of arrow D.
As a result, the mover 11 drives the rack 14 and stretches the spring member 15 in the direction of arrow _X2 .
Move to second position _P2 .

As shown in FIGS. 1 and 3, when the slider 11 is moved to the second position _P2 , the recess 20 of the cam 21 reaches a position facing the pin 22a, and the pin 22a is placed in the recess 20. When fitted, the gear 17 is locked unrotatably.

As a result, the mover 11 is locked at the second position _P2 while being urged in the direction of arrow _X1 by the spring member 15.

Further, due to the rotation of the lever 22 accompanying the locking operation, the switch 29 is turned off, and the motor 18 is turned off.
stops. Subsequently, the disk 5 is rotated by the motor 2, and the optical pickup 7 is moved by the motor 10 from the standby position A in the direction of arrow _X2 and within the moving range B, and the disk 5 is reproduced.

Next, the operation of returning the optical pickup 7 to the standby position A will be explained.

If you perform a disk squeegee operation after or during playback of a song on disk 5, the detection circuit 2
5 outputs a signal, and the control circuit 27 demagnetizes the plunger 23. As a result, the lever 22
is rotated clockwise by the spring 30, and the pin 22a
is removed by the recess 20 as shown by the two-dot chain line in FIG. 1, and the gear 17 is unlocked.

As a result, the lock of the mover 11 is released,
During the return movement of the mover 11, in which the mover 11 is quickly returned to the first position _P1 in the direction of arrow _X1 by the spring member 15, the locking portion 13 locks the optical pickup 7, Locking part 1
3, moves in the direction of arrow _X1 together with the mover 11, and is quickly pushed back to the standby position A.

Further, by the eject operation described above, the clamper elevating mechanism 6 is operated, the clamper 3 is lowered in the direction of arrow _Z2 , and the disk 5 is unclamped, lowered and placed on the tray 4, and moved out of the player together with the tray 4. be discharged.

When the disk 5 is unclamped and descends, the optical pickup 7 has already returned to the standby position A, and the inconvenience of the disk 5 colliding with the optical pickup 7 does not occur.

Next, we will explain what happens when the power is accidentally turned off during disc playback.

When the power is turned off, the disk 5 is unclamped and the plunger 23 is demagnetized.

When the plunger 23 demagnetizes, the lock is released, the spring member 15 moves the slider 11 to the first position _P1 , and the optical pickup 7 is quickly pushed back to the standby position.

Therefore, even if the disk 5 is unclamped and descends, it will not collide with the optical pickup 7.

Further, even if a power outage occurs during disk playback, the optical pickup 7 is quickly pushed back to the standby position A by the mover 11 in the same way as in the above case. Thereby, even if the disk 5 is unclamped and descends, it will not collide with the optical pickup 7.

Now, regarding the optical pickup 7 located at the standby position A, the optical pickup 7 is pushed by the movable element 11 by the spring force of the spring member 15, is pressed against the bracket 31, and is held by the spring force.

Therefore, even if a shock is applied to the player during transport, the optical pickup 7 will not be moved unnecessarily.

Therefore, the mechanism for pushing the optical pickup 7 back to the standby position A has a mechanism for holding the optical pickup 7 at the position A, and no locking screw or the like is required.

Furthermore, as the mover 11 moves to the first position _P1 , the optical pickup 7 is released from being held and becomes free to move. Therefore, when using the above-mentioned lock screw, the trouble of removing the lock screw can be saved, and misuse of the lock screw without removing it can be avoided.

In order to suppress the impact when the optical pickup 7 is pushed back, buffer pieces 35 are provided on the bracket 31 and the other brackets 32, 33, and 34.

Effects of the invention As explained above, according to the disc player of the invention, the disc is configured such that the disc is clamped to the bottom surface of the turntable, and
When a disc is removed or the power to the player is cut off during playback, the slider is unlocked and moved by the spring force of the spring member, and the optical pickup is pushed back to the standby position by the slider. Therefore, the optical pickup can be quickly pushed back to the standby position, and even if the disk is unclamped and descends, it is possible to prevent the disk from colliding with the optical pickup and damaging it. It has characteristics.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are a plan view, a front view, a side view, and FIGS. 4 and 5, respectively, showing states during disk playback of an embodiment of the disk player of the present invention.
FIG. 6 is a plan view, a front view, and a side view of an embodiment of the disc player of the present invention, respectively, showing the state immediately after a disc ejecting operation. 1... Turntable, 3... Disk clamper, 4... Tray, 5... Compact disk,
6... Clamper lifting mechanism, 7... Optical pickup, 10... Linear motor, 11... Mover, 1
2... Guide rod, 13... Locking part, 14...
Rack, 15... spring member, 16... moving mechanism,
17... Gear, 18... Motor, 19... Lock mechanism, 20... Recess, 21... Cam, 22... Lock lever, 22a... Lock pin, 23... Plunger, 24... Disc clamp detection circuit,
25...Disk squeegee operation detection circuit, 27
...Drive control circuit, 28, 30...Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A turntable is arranged downward above a tray on which a disk is placed, a clamper moves upward, the disk is pushed up from the tray and clamped to the turntable, and an optical pick-up is performed. The disc player is configured such that the disc is moved under the disc to play the disc, a clamper moves down, the disc is unclamped, and the disc is lowered and placed on the tray, the optical pick-up a mover movable between a first position corresponding to the standby position of the optical pickup and a second position beyond the inner circumferential position of the disk within the movement range of the optical pickup; a spring member that biases the slider in the direction of the second position; a mechanism that moves the slider to the second position against the spring member prior to playback of the disk; When the disc is locked in position and the disc clamped to the turntable is removed from the disc player, or when the power to the disc player is cut off, the lock mechanism is activated to release the lock. When released, the mover returns to the first position by the spring member, and during the return, the mover locks the optical pick-up and pushes the optical pick-up back to the standby position. player.