JP2002140849A - Disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk player which attains cost reduction, miniaturization and weight saving by reducing the number of installed motors. SOLUTION: A rack part 2a fixed to an optical pickup 2 is disengaged from the thread part 3a of a lead screw 3 when the optical pickup 2 is located at the position of the innermost part of the disk, and engages with thread part 3a when the optical pickup 2 moves in the direction of the outer periphery of the disk. Moreover, a rack plate 8 for triggering which engages with a power gear 7 by the operation of a sensor arm 50 is provided, and a slide lever 9 which moves the optical pickup 2 in the direction of the outer periphery of the disk is disposed in contract with the tapered part 8c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk player for loading and reproducing a disk, and more particularly to a disk player having an improved drive system for supplying a driving force to a loading roller and an optical pickup.

[0002]

2. Description of the Related Art At the present time when digital technology has progressed rapidly, disks such as CDs and CD-ROMs as recording media have become widespread, and various types of disk players have appeared. Above all, disc players for vehicles have been receiving great demand as main devices of navigation systems, beyond being audio players. In order to respond to such demands, cost reduction and reduction in size and weight of the apparatus are more strongly desired. By the way, three motors are usually used in a disc player. That is, a motor for driving a loading mechanism for bringing the disk into the turntable, a spindle motor for rotating the disk on the turntable, and a motor for driving the optical disk pickup feed mechanism for moving the optical pickup for reading signals in the radial direction of the disk. is there.

[0003]

The conventional disk player having the above-mentioned three motors has the following problems. That is, the unit cost of the motor is high, and the ratio of the motor to the cost of the entire disc player is considerably large. This has been an obstacle in reducing the cost of the disc player. In addition, having three motors means that there are also three independent driving force transmission systems, which increases the number of parts, resulting in a heavy and complicated configuration.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a disk player in which the number of motors to be installed is reduced to greatly reduce the cost and size and weight. To provide.

[0005]

To achieve the above object, the present invention provides a turntable on which a disc is placed,
An optical pickup for reading a signal from the disc on the turntable, a lead screw for moving the optical pickup in the radial direction of the disc, and loading the disc on the turntable and separating from the disc when the disc setting on the turntable is completed The disk player provided with the loading roller configured as described above has the following technical features.

According to a first aspect of the present invention, there is provided a first gear train connected to the loading roller, a second gear train connected to the lead screw, and the first and second gear trains.
One drive motor that supplies a driving force to the gear train, a sensor arm that operates upon completion of disk setting on the turntable, a power gear that meshes with the first or second gear train, and an operation of the sensor arm. A trigger rack that meshes with the power gear, a tapered portion formed on the trigger rack, a slide lever that abuts on the tapered portion and slides to move the optical pickup toward an outer peripheral direction of the disk, and the optical pickup When the optical pickup is fixed to the innermost position of the disk and is in a state of being disengaged from the lead screw, and the optical pickup moves in the outer peripheral direction of the disk, a rack portion that meshes with the lead screw is formed. It is characterized by being provided .

According to the first aspect of the present invention, one driving motor supplies driving force to the loading roller and the lead screw for moving the optical pickup via the first and second gear trains. I have. for that reason,
The loading roller rotates to load the disk on the turntable. On the other hand, although the lead screw is rotating, its rotational force is not transmitted to the optical pickup, and the lead screw is idle. This is because the optical pickup is located at the innermost position of the disk before the disk is set on the turntable and is separated from the lead screw.

When the loading of the disk by the loading roller proceeds and the disk setting on the turntable is completed, the loading roller separates from the disk. In addition, the sensor arm operates in accordance with the completion of the disc setting, and the operation of the sensor arm causes the trigger rack to mesh with the power gear. Since the power gear is rotated by receiving the torque from the first or second gear train, the trigger rack is moved by the rotation of the power gear. When the trigger rack moves, the tapered portion comes into contact with the slide lever, and the slide lever slides with the movement of the trigger rack. Then, the slide lever moves the optical pickup in the outer peripheral direction of the disk. Therefore, the rack fixed to the optical pickup is engaged with the lead screw, and the rotational force of the lead screw is transmitted to the optical pickup. Thereby, the optical pickup can move in the outer peripheral direction. When the drive motor rotates in the reverse direction, the first and second gear trains rotate in the reverse direction, the loading roller rotates to eject the disk, and the lead screw rotates to move the optical pickup in the inner circumferential direction. I do.

As described above, according to the first aspect of the present invention, the driving force is supplied from one drive motor to the loading roller and the lead screw for moving the optical pickup via the first and second gear trains. it can. Therefore, the motors for the loading roller and the lead screw, which were conventionally separately provided, can be reduced to one motor, and the number of motors used can be reduced by one. Since the unit cost of a motor is high, a significant cost reduction can be realized by reducing one motor. In addition, the drive force transmission system can be easily simplified, and the number of components can be reduced, which contributes to downsizing and weight reduction.

According to a second aspect of the present invention, in the disk player of the first aspect, an urging member for urging the optical pickup in an inner circumferential direction of the disk is attached to the optical pickup. I do.

When the drive motor rotates in the reverse direction and the lead screw rotates to move the optical pickup in the inner peripheral direction, the optical pickup finally returns to the innermost peripheral position of the disk, and the rack section on the optical pickup ends. Is disengaged from the lead screw.
At this time, in the invention according to the second aspect having the above configuration, the urging member urges the optical pickup in the inner circumferential direction of the disk, so that the engagement between the rack portion and the lead screw can be smoothly released. In addition, the biasing member can reliably hold the state where the rack portion has come off from the lead screw, and can prevent a problem that the optical pickup operates during disk loading.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [1. Configuration of the present embodiment] Hereinafter, a typical embodiment of the present invention will be specifically described with reference to the drawings. This embodiment is 8cm and 12c
This is applied to a disc player that calls in while discriminating m CDs and reproduces them. This embodiment includes claims 1 and 2, FIGS. 1 and 2 are plan views showing the configuration of this embodiment, and FIG. 3 shows a part of a driving force transmission system of this embodiment. FIG. 4 is a plan view showing a main part of the disk positioning mechanism according to the present embodiment, and FIGS. 5 to 9 are plan views showing a loading state of the disk according to the present embodiment. In the drawings, the lower part is the front and the upper part is the rear.

[1-1: Configuration of Driving Force Transmission System] First, the configuration of the driving force transmission system in the present embodiment will be described. As shown in FIGS. 1 and 2, a spindle motor 1 for rotating a turntable is provided inside a disc player. An optical pickup 2 for reading a signal from a disk is provided near the spindle motor 1,
A lead screw 3 for moving the optical pickup 2 in the radial direction of the disc is disposed at one end of the optical pickup 2. The lead screw 3 includes a screw portion 3a and a shaft portion 3b. A rack 2a is fixed to the optical pickup 2. When the optical pickup 2 is at the innermost peripheral position of the disk, the rack 2a is disengaged from the thread 3a of the lead screw 3. When the optical pickup 2 moves in the outer peripheral direction of the disk, the rack 2a engages with the screw 3a. Has become. A pickup spring 2b for urging the optical pickup 2 in the inner circumferential direction of the disk is attached to the rack 2a. Further, a slider 2c for guiding the operation of the optical pickup 2 is engaged with an end of the optical pickup 2 opposite to the lead screw 3.

A turntable T, which is rotated by the spindle motor 1, is disposed near the center of the chassis X (shown in FIGS. 5 to 9). A roller A is provided. This loading roller A
Is configured to separate from the disk on the turntable T when the disk setting on the turntable T is completed (during disk chucking). The first gear train 41, 42, 43, 44,
The gears 47 are connected to a motor gear 48 press-fitted into the drive motor 5. The lead screw 3 has a second gear train 61,
The gear 63 is connected to the gear 4.
6 are engaged. That is, these gears 41,
42, 43, 44, 45, 46, 47, 48, 61, 6
A single driving motor 5 supplies a driving force to the loading roller A and the lead screw 3 via the components 2 and 63.

Further, the gear 63 has gears 71, 7
The power gear 7 is engaged via the gears 2 and 73 (see FIG. 3). A trigger rack plate 8 is disposed in the vicinity of the power gear 7 so as to be movable back and forth. The trigger rack plate 8 is pressed forward by an urging portion 50c of the sensor arm 50 described later. A rack spring 8a is attached to the trigger rack plate 8. The rack spring 8a moves the trigger rack plate 8 backward when the trigger rack plate 8 is in the retracted position.
In the forward position, this is urged forward.
Further, a notch 8b and a tapered portion 8c are formed on the left and right edges of the trigger rack plate 8, respectively, and a rack 8d is provided continuously from the tapered portion 8c to the rear. The rack 8d is connected to the power gear 7
It is designed to mesh with.

A slide lever 9 which is long in the left-right direction is slidably provided in the left-right direction so as to abut on the tapered portion 8c of the trigger rack plate 8. The right end of the slide lever 9 comes into contact with the optical pickup 2. Guide hole 9a in slide lever 9
Are formed, and the chassis guide S is engaged here. The slide lever 9 has a slide lever 9.
Is mounted on the slide lever spring 9b for urging the left side.

Further, a shift lever 11 is arranged so as to overlap the trigger rack plate 8. An engagement portion 11a is provided at a rear portion of the shift lever 11, and the engagement portion 11a is engaged with a notch portion 8b of the trigger rack plate 8. The shift lever 11 separates the loading roller A from the disk on the turntable T during disk chucking by the disk chucking mechanism (not shown), and when the disk chucking mechanism (not shown) performs an operation of releasing disk chucking. , So as to perform a retreat operation. The shift lever 11 is provided with a shift spring 11b. The shift spring 11b is a shift lever 11
Is urged backward in the retracted position and forward in the advanced position.

[1-2: Configuration of Disk Positioning Mechanism]
Subsequently, the configuration of the disk positioning mechanism will be described with reference to FIGS. 4 to 9 are plan views viewed from the upper surface of the disk upward, and FIGS.
FIG. 2 is a plan view seen from the lower surface of the disk and downward. In other words, the positional relationship between the two is opposite left and right, and the sensor arm 50 shown in FIGS.
The shift lever 9 shown in FIG. 2 is overlapped. As shown in FIGS. 4 to 9, a clamper arm 10 is supported in the chassis X so as to be rotatable in a vertical direction. A linear slide groove 10a is formed in the center of the clamper arm 10 in the front-rear direction.
A guide hole 10b having a substantially arc shape is provided on the right side of a. A regulating portion S1 that is notched rightward is formed at the front end of the guide hole 10b. Also, clamper arm 1
In the vicinity of the right rear corner of 0, a stopper link shaft hole 10c long in the left-right direction is formed. Further, in the vicinity of the front right corner of the clamper arm 10, a sensor arm shaft hole 10d long in the front-rear direction is formed.

The clamper arm 10 includes a disc stopper 20, a stopper link 30, and a sensor arm 50 for positioning the disc when inserting and ejecting the disc.
Are arranged. The disk stopper 20 is a plate that is long in the left-right direction, and a slider 20a is attached to the center of the plate. The slider 20a is provided in the slide groove 10a of the clamper arm 10 so as to be slidable back and forth. Near the left and right end portions of the disc stopper 20, there are formed contact portions 20b which contact the edges of the inserted disc to position the disc.

The stopper link 30 is provided rotatably in the stopper link shaft hole 10c of the clamper arm 10 via a shaft 30a and slidably to the left and right. Since one end of the stopper link 30 is rotatably attached to the slider 20a with a certain margin, the stopper link 30 is configured to rotate with the movement of the disk stopper 20. The stopper link 30 has a guide hole 10 of the clamper arm 10.
b is provided with a dowel 30b inserted therethrough. further,
A cam hole 30c is provided near the other end of the stopper link 30. A substantially L-shaped restricting portion S2 is formed at the front end of the cam hole 30c.

The sensor arm 50 is a member which is long in the front-rear direction, and is provided rotatably in the sensor arm shaft hole 10d of the clamper arm 10 via a shaft 50a and slidably in the front-rear direction. Sensor arm 50
The rear portion is provided with a cam pin 50b inserted into the cam hole 30c of the stopper link 30. At the front end of the sensor arm 50, a contact portion 50d that contacts the edge of the 12 cm disk is provided. A tension coil spring 60 is provided between the stopper link 30 and the sensor arm 50.

Further, a biasing portion 50c is provided at the rear end of the sensor arm 50. The urging unit 50c serves as a trigger unit for starting the operation of the disc chucking mechanism and the feeding operation of the optical pickup 2. That is, when the urging portion 50c of the sensor arm 50 moves forward,
A disc chucking mechanism (not shown) is operated, and the trigger rack plate 8 is pressed. During disc chucking, the shift lever 11 presses the urging portion 50c of the sensor arm 50, so that contact between the disc stopper 20 and the disc is avoided.

[2. Operation of the present embodiment] The operation of the present embodiment having the above-described configuration will be described separately for a disc insertion operation, an optical pickup feeding operation, a disk ejection operation, and an optical pickup initial position return operation. I do. [2-1: 8 cm Disc Insertion Operation] When an 8 cm disc D1 is inserted from the disc insertion slot, the driving force from the drive motor 5 is transmitted from the motor gear 48 to the first gear train 47,4.
6, 45, 44, 43, 42, 41, and the loading roller A rotates to draw the disk D1 into the chassis X. (FIG. 5).

Then, the trailing edge of the disk D1 comes into contact with the contact portion 20b of the disk stopper 20, and the disk stopper 20 moves rearward. For this reason, the stopper link 3
The stopper link 30 rotates clockwise in the drawing until the dowel 30b at 0 contacts the rear end of the regulating portion S1 of the guide hole 10b (from FIG. 5 to FIG. 6). At the same time, the regulating portion S2 of the cam hole 30c in the stopper link 30 urges the pin 50b of the sensor arm 50 forward, so that the sensor arm 50 slides forward. Therefore, the urging portion 50c of the sensor arm 50 moves forward, and the operation of the disk chucking mechanism starts. At the same time, the urging unit 5
0c pushes the trigger rack plate 8 forward, and the forward movement of the trigger rack plate 8 also starts the feeding operation of the optical pickup 2.

[2-2: Insertion operation of 12 cm disc] On the other hand, when a 12 cm disc D2 is inserted from the disc insertion slot, when the loading roller A pulls the disc D2 into the chassis X, the disc D2 has a large diameter. It comes into contact with the contact portion 50d of the sensor arm 50. Then, as the loading of the disk D2 proceeds, the sensor arm 50 rotates counterclockwise (from FIG. 7 to FIG. 8). Then, the cam pin 50b of the sensor arm 50 is moved to the cam hole 30c of the stopper link 30.
, And urges the cam hole 30c to the left. Therefore, the stopper link 30 moves to the left, and the dowel 30b is disengaged from the restriction S1 of the guide hole 10b.

As a result, the stopper link 30 can be pivoted rearward of the restricting portion S1, and the disk D2 moving rearward urges the disk stopper 20, so that the slider 2a moves behind the slide groove 1a. Until the end is reached, the stopper link 30 rotates clockwise in the figure against the urging force of the extension coil spring 60 (FIGS. 8 to 9).
What). At the same time, the cam hole 30 in the stopper link 30
c, the cam pin 50b of the sensor arm 50
Is urged forward, so that the sensor arm 50 slides forward. Therefore, as in the case of the insertion operation of the 8 cm disk D1, the urging portion 50 of the sensor arm 50 is used.
c moves forward, the operation of the disc chucking mechanism,
The feed operation of the optical pickup 2 by the advance of the trigger rack plate 8 starts.

The transmission of the driving force to the loading roller A during the above-described disk insertion operation is performed by the driving motor 5 through the motor gear 48 and the first gear trains 41 and 4.
2, 43, 44, 45, 46, 47, the driving force is also transmitted to the lead screw 3 via the first gear trains 46, 47 and the second gear trains 61, 62, 63. ing. However, before the disk is chucked on the turntable T, the rack 2a of the optical pickup 2 and the screw 3a of the lead screw 3 are in a disengaged state, and the rotational force of the lead screw 3 is transmitted to the optical pickup 2. Is in an idle state without transmission. At this time, the pickup spring 2b is
Is biased toward the inner circumferential direction of the disk, so that the rack portion 2a can be kept detached from the lead screw 3, and the optical pickup 2 can be held during the loading of the disk.
Will not work.

Further, the slide lever 9 receives a leftward biasing force from the slide lever spring 9b, so that the right end of the slide lever 9 and the optical pickup 2 are surely separated from each other. Further, the power gear 7, which receives a rotational force from the gear 63 via the gears 71, 72, 73, is also rotating. However, since the power gear 7 does not mesh with the rack portion 8d of the trigger rack plate 8, the power gear 7 also enters the idle state. continuing. At this time, the trigger rack plate 8 is at the retracted position and the rack spring 8a urges the trigger rack plate 8 rearward, so that the rack portion 8d of the trigger rack plate 8 and the power gear 7 are also surely separated. ing.

[2-3: Feeding Operation of Optical Pickup]
With the disk chucking mechanism chucking the disk, the trigger rack plate 8 moves forward, and the rack portion 8 d of the trigger rack plate 8 moves to the power gear 7.
Mesh with. At this time, the power gear 7 is
Since the trigger rack plate 8 is rotated by receiving the rotational force from the drive motor 5 via the gears 1, 72, 73, the trigger rack plate 8 moves forward by the rotation of the power gear 7. When the trigger rack plate 8 moves forward, the tapered portion 8c contacts the left end of the slide lever 9. The slide lever 9 slides rightward while being guided by the chassis guide S as the trigger rack plate 8 advances, and pushes the optical pickup 2 rightward at the right end. Thereby, the optical pickup 2 moves in the outer peripheral direction of the disk (from FIG. 1 to FIG. 2).

When the optical pickup 2 moves in the outer peripheral direction of the disk, the rack 2a fixed to the optical pickup 2 meshes with the thread 3a of the lead screw 3, and
The rotational force of the lead screw 3 is transmitted to the optical pickup 2. Thus, the optical pickup 2 can move in the outer peripheral direction while receiving the elastic force of the pickup spring 2b, and can perform the feeding operation. During playback of the disc, the shift lever 11 moves the urging portion 5 of the sensor arm 50.
Since 0c is pressed, the disk stopper 20 does not hit the disk, and there is no hindrance to the rotation operation of the disk on the turntable T. If the drive motor 5 rotates in the reverse direction and the motor gear 48 rotates in the reverse direction,
First and second gear trains 41, 42, 43, 44, 45,
Since 46, 47, 61, 62 and 63 also rotate in the reverse direction, the lead screw 3 rotates so as to move the optical pickup 2 in the inner circumferential direction. At this time, the loading roller A rotates so as to eject the disk. However, the operation of the shift lever 11 causes the loading roller A to be separated from the disk on the turntable T at the time of disk chucking. Has no effect.

When the trigger rack plate 8 starts to move forward, the front end of the notch 8b is in contact with the engaging portion 11a of the shift lever 11. Therefore, while the notch 8b is in contact with the engaging portion 11a, the trigger rack plate 8
Keeps moving forward, but when the rear end of the notch 8b starts pushing the engaging portion 11a, the shift lever 11 also moves forward. Then, the rack part 8 of the trigger rack plate 8
The trigger rack plate 8 stops in a state where d is separated from the power gear 7. In this state, the trigger rack plate 8 and the shift lever 11 are in the forward position, the rack spring 8a biases the trigger rack plate 8 forward, and the shift spring 11b biases the shift lever 11 forward. Therefore, the rack portion 8d of the trigger rack plate 8 does not mesh with the power gear 7, and the trigger rack plate 8 does not move carelessly.

[2-4: Ejecting Operation of 8 cm Disc] When the loading roller A is in contact with the disc, the loading roller A receives the driving force of the driving motor 5 which rotates in the reverse direction.
When is rotated in the reverse direction, the 8 cm disc D1 is ejected. At this time, the contact portion 20b of the disc stopper 20 is released from the urging force applied by the trailing edge of the disc D1. Then, until the dowel 30b of the stopper link 30 comes into contact with the front end of the regulating portion S1 of the guide hole 10b, the stopper link 40 rotates counterclockwise in the drawing by the urging force of the extension coil spring 60 (from FIG. 2 to FIG. 1). What). At the same time, the disc stopper 20 moves forward and returns to the initial position, and the restricting portion S2 of the cam hole 30c in the stopper link 30 urges the pin 50b of the sensor arm 50 rearward, so that the sensor arm 50 moves rearward. Slide to move. Thus, the urging portion 50 of the sensor arm 50
c moves away from the trigger rack plate 8.

[2-5: 12 cm disc ejection operation] 1
When ejecting the 2 cm disc D2, the disc stopper 2
The zero contact portion 20b is released from the urging force applied by the trailing edge of the disk D1. Then, the stopper link 30
The stopper link 30 rotates counterclockwise by the urging force of the tension coil spring 60 until the dowel 30b in (1) contacts the front end of the regulating portion S1 of the guide hole 10b (from FIG. 9 to FIG. 8). At the same time, the disk stopper 20 moves forward to return to the initial position, and the stopper link 3
0, the sensor arm 5
Since the zero pin 50b enters and urges rearward, the sensor arm 50 slides rearward. Then, the urging portion 50c of the sensor arm 50 is separated from the trigger rack plate 8.

[2-6: Operation of Returning Initial Position of Optical Pickup 2] When the sensor arm 50 slides backward, the disk chucking mechanism performs the operation of releasing the disk chucking, and the shift lever 11 performs the backward operation. Do. During the feeding operation of the optical pickup 2,
The trigger rack plate 8 and the shift lever 11 are in the forward position, and the shift lever 1 is located at the rear end of the notch 8b.
One engaging portion 11a is engaged. Therefore, the engaging portion 11a of the shift lever 11 is
Is pressed, and the trigger rack plate 8 also retreats. Therefore, the rack portion 8d of the trigger rack plate 8 meshes with the power gear 7. At this time, the drive motor 5 is rotating in the reverse direction, and its rotational force is transmitted to the power gear 7 via the gears 63, 71, 72, 73, and the power gear 7 is also rotating in the reverse direction. As a result, the trigger rack plate 8 receives the rotational force of the power gear 7 and further retracts to return to the initial position.

At the stage where the trigger rack plate 8 receives the rotational force of the power gear 7, the front end of the notch 8b of the trigger rack plate 8 hits the engaging portion 11a of the shift lever 11, and the trigger rack plate 8 retreats. At the same time, the notch 8b pushes the engaging portion 11a of the shift lever 11, and the shift lever 11 also moves backward. Then, the trigger rack plate 8 stops in a state where the rack portion 8d of the trigger rack plate 8 is separated from the power gear 7. The rack spring 8a and the shift spring 11b also return to the initial positions with the retreating operation of the trigger rack plate 8 and the shift lever 11. When the trigger rack plate 8 retreats, the tapered portion 8c moves away from the left end of the slide lever 9, and
The slide lever 9 receives a leftward biasing force from the slide lever spring 9b and slides leftward while being guided by the chassis guide S (FIGS. 2 to 1).
What).

The right end of the slide lever 9 is separated from the optical pickup 2 by the slide operation of the slide lever 9 to the left. In this state, when the optical pickup 2 returns to the innermost position of the disk due to the reverse rotation of the lead screw 3, the rack 2 a of the optical pickup 2 is disengaged from the thread 3 a of the lead screw 3. At this time, since the pickup spring 2b urges the optical pickup 2 in the inner circumferential direction of the disk, the engagement between the rack 2a and the screw 3a of the lead screw 3 can be smoothly released. Therefore, the optical pickup 2 can surely return to the initial position.

[3. Effects of the present embodiment] According to the present embodiment as described above, when the disk is chucked, the rack portion 2a of the optical pickup 2 and the lead are operated by the operation of the trigger rack plate 8 and the slide lever 9. By connecting the screw portion 3 a of the screw 3, a driving force can be supplied from one drive motor 5 to the loading roller A and the lead screw 3 for moving the optical pickup 2. Therefore, it is possible to reduce the number of motors whose component parts are expensive by one, thereby realizing cost reduction. In addition, since the driving force transmission system can be simplified and the number of parts can be reduced, it is possible to contribute to the reduction in size and weight of the disc player.

[4. Other Embodiments] The present invention is not limited to the above-described embodiments.
As a configuration for detaching the rack 2a of the optical pickup 2 and the screw 3a of the lead screw 3, as shown in FIG. 10, a rotary lever 12 is attached to the optical pickup 2 instead of the pickup spring 2b. May be provided with a torsion spring 13. The torsion spring 13 is configured to move the optical pickup 2 in the inner circumferential direction of the disk. Similar effects can be obtained by attaching a magnet that moves the optical pickup 2 in the inner circumferential direction of the disk. It should be noted that the disc player not only discriminates and reproduces between 8 cm and 12 cm CDs, but also
It is also applicable as an OM playback device.

[0039]

As described above, according to the disk player of the present invention, the optical pickup is moved in the outer peripheral direction of the disk and engaged with the lead screw when the disk setting on the turntable is completed. Thus, the number of motors to be installed can be reduced, and the cost and the size and weight can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a typical embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a plan view showing a part of the driving force transmission system of the embodiment.

FIG. 4 is a plan view of a main part of the disk positioning mechanism according to the embodiment.

FIG. 5 is a plan view showing a loading state of the disk in the embodiment.

FIG. 6 is a plan view showing a loading state of the disk in the embodiment.

FIG. 7 is a plan view showing a loading state of the disk in the embodiment.

FIG. 8 is a plan view showing a loading state of the disk in the embodiment.

FIG. 9 is a plan view showing a loading state of the disk in the embodiment.

FIG. 10 is a plan view of another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spindle motor 2 ... Optical pickup 2a ... Rack part 2b ... Pickup spring 2c ... Slider 3 ... Lead screw 3a ... Screw part 3b ... Shaft part 5 ... Drive motor 7 ... Power gear 8 ... Trigger rack plate 8a ... Rack spring 8b ... Notch 8c Tapered portion 8d Rack 9 Slide lever 9a Guide hole 9b Slide lever spring 10 Clamper arm 11 Shift lever 11a Engagement portion 11b Shift spring 12 Rotary lever 13 Torsion spring 41 , 42, 43, 44, 45, 46, 47 ... first gear train 48 ... motor gear 50 ... sensor arm 61, 62, 63 ... second gear train A ... loading roller D1 ... 8 cm disc D2 ... 12 cm disc T ... Turntable X Chassis

Claims (2)

[Claims] A turntable on which a disc is placed;
An optical pickup for reading a signal from the disc on the turntable, a lead screw for moving the optical pickup in the radial direction of the disc, and loading the disc on the turntable and separating from the disc when the disc setting on the turntable is completed A first gear train connected to the loading roller, a second gear train connected to the lead screw, and a first and a second gear train connected to the loading roller. One drive motor that supplies a driving force to the gear train, a sensor arm that operates upon completion of disc setting on the turntable, a power gear that meshes with the first or second gear train, and an operation of the sensor arm The power gi A trigger rack meshing with the trigger rack; a tapered portion formed in the trigger rack; a slide lever that abuts on the tapered portion and slides to move the optical pickup in an outer peripheral direction of the disk; and fixed to the optical pickup. When the optical pickup is at the innermost peripheral position of the disk, the optical pickup is in a state of being disengaged from the lead screw, and the optical pickup moves in the outer peripheral direction of the disk, and a rack portion that meshes with the lead screw is provided. A disc player, characterized in that: 2. The disc player according to claim 1, wherein an elastic member for urging the optical pickup in an inner circumferential direction of the disc is attached to the optical pickup.