JPS61236086A - Disc player - Google Patents

Abstract

PURPOSE:To attain thin profile of a disc player by moving the 2nd spindle motor in parallel while the direction of the turning center of the 2nd spindle motor is unchanged. CONSTITUTION:A support pin 20 prolonged vertically to a disc carrying face of the 1st spindle motor 13 on a base member 10, a rocking member 21 is supported freely rockably and the 2nd spindle motor 19 is fitted to the free end of the rocking member 21. A worm wheel 22 is fixed to the rocking support end of the member 21 and the worm wheel is connected to an output shaft of a motor 27 via a worm 23, a pulley 24, a belt 25 and a pulley 26. Thus, a drive torque provision means giving a torque to the member 21 consists of them. Further, the moving means moving the 2nd spindle motor 19 consists of the drive torque providing means, the member 21 and the support pin 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a disc player, and more particularly to a disc player capable of playing a plurality of types of discs having different outer diameters.

Recently, disc players that can play both optical video discs and compact discs have been developed. Spindle motors are used to rotate these discs, but optical video discs and compact discs differ greatly in the dimensions stipulated by the disc standards, such as center hole diameter, clamping area, and signal start diameter. Therefore, it has been difficult to create a spindle motor that can hold both disks in common.

In addition, in order to accurately trace the bits (dents) carved in micron order on the disk, it is necessary to have extremely accurate pickup performance and to control the rotation of the disk. Since the playback rotation speed of an optical video disc, which has a larger outer diameter and weight than a compact disc, is relatively high, a spindle motor that rotates the disc is required to be suitable for high-load, high-speed rotation.

On the other hand, compact discs are small and lightweight, weighing approximately 1/10 of optical video discs, and their playback speed is low.When driving them in rotation, they are easily affected by cogging and torque fluctuations, and extremely high-precision rotation is required. It is necessary to take control.

For the above-mentioned reasons, disc players that have already been developed do not share a common spindle motor, but have dedicated spindle motors for each of the optical video disc and compact disc. Although optical disc players and compact discs have the above-mentioned differences, they both focus a laser beam on the bit through a transparent resin surface and read information signals by the reflected light. , a format is adopted in which information signals from both discs are read by a single pickup.

FIG. 18 shows a schematic diagram of the main parts of a disc player that has already been developed. As shown in the figure, a first spindle motor 202 rotates an optical video disc 201 and a compact disc (described later). The second spindle motors 203 to be driven are arranged so that their respective rotation center axes are located in the same plane, and each can freely reciprocate in the direction of arrow Y and the opposite direction (for example, the front-rear direction of the disc player). Although not shown, a moving means for moving the first spindle motor 202 and the second spindle motor 203 is provided. The position is the disk rotation drive position of each spindle motor, and along the plane containing the disk carrying surface of the spindle motor at this position, in this case, in the arrow X direction perpendicular to the arrow Y direction and in the opposite direction (the disk The carriage 204
is designed to move back and forth. The carriage 204 is equipped with an optical pickup means including an objective lens 205.

FIG. 18(b) shows the state when playing the compact disc 206, in which the second spindle motor 203 moves to the disc rotation drive position, and the first spindle motor 202 is removed from this position. It is being

In a disc player having such a configuration, a large space must be provided within the player housing in order to allow the first spindle motor 202 and the second spindle motor 203 to reciprocate, making the entire disc player large. Further, the moving means for reciprocating the two spindle motors needs to have a large output, which also causes the disc player to become larger.

Furthermore, since the relative positional dimension with the optical pickup means needs to be highly accurate, it is necessary to accurately position both spindle motors at the above-mentioned disk rotation drive position, and a positioning mechanism for this purpose is provided for each spindle motor. Each motor is provided separately, making the structure complicated.

FIG. 19 schematically shows the main parts of another disc player. In this disc player, a first spindle motor 202 and a second spindle motor 203 are each fixed, and a carriage 204 reciprocates between both spindle motors. The disc player with this configuration does not require the above-mentioned drive mechanism or positioning mechanism, and has a simple structure. However, even if the dimensions of the internal structure in the moving direction of the carriage 204 are at least the diameter of the optical video disc 201 = D
I, the radius of the second spindle motor 203: R2, and the radius of the compact disk 206 = D2 /2 (However,
(D2 is the diameter of the compact disc 206). Therefore, it was inevitable that disk players would become larger.

To 11 11 The present invention has been made in view of the above-mentioned points, and its purpose is to provide a disc player that is easy to downsize and has a simple structure.

A disc player according to the present invention includes a first spindle motor fixed on a predetermined support mechanism for rotationally driving, for example, an optical video disc, and a first spindle motor carrying a pickup means and extending along a plane including a disc carrying surface of the first spindle motor. and a second spindle motor that rotationally drives a compact disc, the second spindle motor having a disc supporting surface located on substantially the same plane as the disc supporting surface of the first spindle motor, and a second spindle motor that rotates the compact disc. A plane including a first position where the distance between the centers of rotation with the first spindle motor is greater than the sum of the radius of the disk to be supported and the radius of the disk support surface of the first spindle motor and the disk support surface of the first spindle motor. The carriage is movable between a predetermined range of It is characterized by parallel movement without changing the direction of the rotation center axis of the spindle motor.

JLJL Hereinafter, a disc player as an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates the entire disc player.

As shown in FIG. 1, the front surface of the housing 2, that is, the front panel 3, is provided with a rectangular opening 3a extending in the left-right direction so that the disk supporting portion 5 can protrude outside the housing. ing. However, the term "left and right" as used herein refers to the front direction indicated by the arrow Y, and the direction of the arrow X is the left direction. Further, arrow 2 indicates upward. A door 6 is provided near the opening 3a to close the opening. Furthermore, on the front panel 3 there is a group of switches 7 for operating the disc player.
is provided.

A chassis 8 is provided within the housing 2, and a base member 10 shown as a second factor is fixed to a predetermined position on the lower surface of the chassis by screws 11 or the like. These base member 10, screws 11, etc. are collectively referred to as a support mechanism.

A first spindle motor 13 is provided at one end of the base member 10.
is permanently installed. This first spindle motor 13 is
It is for rotating an optical video disk 14 having a diameter of approximately 30 cv+ or 20 cm, and is suitable for high-load, high-speed rotation. Behind the first spindle motor 13 is a carriage 1 carrying an optical pickup means.
5 is arranged, and the first spindle motor 13
The base member 10 is guided by a guide shaft 16 provided on the base member 10 so as to move along a plane including the disk supporting surface 13a of the base member 10.

Also provided on the base member 10 is a second spindle motor 19 for rotating a compact disc 18 having a diameter of approximately 12C1l. 2nd spindle motor 1
9 is movable between a first position shown by a solid line in FIG. 2 and a second position shown by a two-dot chain line. This first position means that the disk supporting surface 19a of the second spindle motor is on substantially the same plane as the disk supporting surface 13a of the first spindle motor 13, and the distance between the rotation centers of the first spindle motor 13 is The radius 02/2 of the compact disc 18 to be supported (where D2 is the diameter of the compact disc 18) and the first spindle motor 1
This position is larger than the sum of the radius R+ of the disk supporting surface of 3. That is, the outer periphery of the compact disc 18 placed on the second spindle motor 19 in the first position is
This is done so that it does not come into contact with the first spindle motor 13. Further, the second position is a position away from the plane including the disk supporting surface 13a of the first spindle motor 13 and the movement locus of the carriage 15. However, although the second position is different from the detached position shown in the figure, the second position is the disk supporting surface 13a of the first spindle motor 13.
Even if it is within a plane including the diameter of the optical video disk 14 placed on the first spindle motor 13, it is sufficient. As is clear from the figure, the second spindle motor 19 is moved in parallel without changing the direction of the rotation center axis of the second spindle motor.

A moving means for moving the second spindle motor 19 will be explained based on FIG. 3.

As shown in the figure, a support bin 20 is provided on the base member 10 and extends perpendicularly to the disk supporting surface of the first spindle motor 13, and the swinging member 21 is swingably supported by the support bin. has been done. A second spindle motor 19 is attached to the free end of this swinging member 21. A worm wheel 22 is fixed to the swing support end of the swing member 21, and the worm wheel is connected to the output shaft of a motor 27 via a worm 23, a pulley 24, a belt 25, and a pulley 26. There is. These worm wheel 22, worm 23, pulley 24.2
6. The swinging member 21 is rotated by the belt 25 and the motor 27.
A driving force applying means is configured to apply a driving force to. Further, the driving force applying means, the swinging member 21, and the support bin 20 constitute a moving means for moving the second spindle motor 19. In this way, by the extremely simple movement of the swinging member 21, the second
By configuring the spindle motor 19 to move, the structure of the moving means is extremely simple, making it easy to reduce costs.

Note that the moving means and the first and second spindle motors 1
3.19, a support mechanism including a base member 10 that supports both spindle motors, a carriage 15 including an optical pickup means, and peripheral small members related thereto constitute a playing means for playing a disc. There is.

Next, a description will be given of a disc transport mechanism that includes the disc carrying section 5 described above and transports a disc to be played to a playing position.

As shown in FIGS. 1 and 4, the disk holding section 5
has a first carrier 32 carrying an optical video disc 14 to be placed on the first spindle motor 13 and a second carrier 33 carrying a compact disc 18 to be placed on the second spindle motor 19. ing.

The upper surface of the first carry 32 has a diameter of approximately 30 cm and a diameter of 20σ.
Two circular shallow recesses 32a and 32b are formed concentrically, into which optical video discs are respectively inserted.

Further, the upper surface of the second carrier 33 has a circular recess 33a into which the compact disc 18 can be inserted, and a circular recess 33a with a diameter of 20 cyn.
A portion 33b is formed which can be continuous with the circular recess provided in the first carrier 32 for an optical video disc. A pair of left and right guide shafts 34 are provided at the bottom of the first carry 32 and extend in a plane parallel to the disk supporting surface 13a of the first spindle motor 13, in this case, in the front-rear direction (direction of arrow Y and the opposite direction). has been
The second carry 33 is movably attached to both guide shafts. Note that FIGS. 1 and 4 show the state before the second carrier 33 moves, and in this state, the circular recess 33a formed in the second carrier 33 for inserting a compact disc is inserted into the first carrier. 32, a circular recess 32a for inserting an optical video disc;
32b. 2nd carry 3
A pair of protrusions 33d are provided on both left and right sides of the first carrier 32, and when these protrusions 33d engage with a total of four locking parts 32d and 32e, two each protruding from the lower surface of the first carry 32, , the movement of the first carry 33 relative to the first carry 32 is restricted within a predetermined range.

As is clear from FIG. 4, a pair of slide members 35 extending in the front-rear direction are provided on the lower surface of the first carry 32 so as to sandwich the second carry 33 from the left and right, and both slide members It is capable of reciprocating within a predetermined range in the front-rear direction with respect to the carry 32. The other end of a coil spring 36 attached to the first carry 32 at one end is connected to both slide members 35,
Both slide members are moved rearward (
A bias bias is applied in the opposite direction (direction of arrow Y). Each slide member 35 has a rack portion 35a formed along the movement direction on one side with respect to the movement direction, and a gear 38 provided on the lower surface of the first carrier 32 meshes with the rack portion. This gear 38 has two large and small gears 39 and 40 provided coaxially, and has a rack portion 35a.
It is the small gear 40 that is meshed with. The large gear 39 is
It meshes with another rack part 33e provided on both left and right sides of the second carry 33 corresponding to the rack part 35a.

On the other hand, as also shown in FIG. 4, an L-shaped contact portion 2a is provided at a predetermined position within the housing 2, with which the rear end portion of the slide member 35 can come into contact. That is, the rear end portion of the slide member 35 contacts the contact portion 2a during the rearward movement of the disk holder 5, and as the disk holder 5 further moves rearward from this state, the second carrier 3
3 moves rearward with respect to the first carry 32.

7 to 9 individually show the constituent members of the gear 38 interposed between the slide member 35 and the second carry 33. As illustrated, a large gear 39, which is a component of the gear 38, is provided with a boss portion 39a, and the small gear 40 is rotatably fitted into the boss portion. A pair of hook portions 40a are formed on one main surface of the small gear 40, and the hook portions are fitted into a pair of fan-shaped openings 39b formed in the large gear corresponding to the hook portions. This allows the small gear 40 to rotate relative to the large gear 39 within a predetermined range.

Further, a flange portion 39c is provided on the inner edge of the fan-shaped opening 39b, and the hook portion 408 engages with the flange portion, thereby preventing the small gear 40 from falling off from the large gear 39. . A ring spring 41 shown in FIG. 9 is interposed between the large gear 39 and the small gear 40. One end of the ring spring 41 is engaged between two protrusions 39d and 39e protruding from the main surface of the large gear 39, and the other end of the ring spring 41 is engaged with a hook 40a of the small gear 40. It has been stopped. That is, the large gear 39
The small gear 40 and the small gear 40 are connected through the elastic force of the ring spring 41, so that when a rotational force of more than a predetermined value is applied between the two gears, the two gears rotate relative to each other. move.

Note that, as is clear from the above-described configuration, when the disk supporting portion 5 protrudes outside the housing 2, the bias of the coil spring 36 is transmitted to the second carry 33 via the slide member 35 and the gear 38. The second carry is returned to the position shown in FIG.

The movement of the second carry 33 with respect to the first carry 32 is controlled by the slide member 35, the gear 38, the rack part 33e formed on the second carry 33, and the coil spring 36 serving as a bias applying means. A carry movement mechanism is configured in response to the protruding and retracting operation with respect to the housing 2.

Here, the rearward movement of the second carry 33 with respect to the first carry 32 is performed by appropriately adjusting the position of the abutment part 2a protruding into the housing 2 so that the rear end of the slide member 35 comes into contact with it. is set to start after the rearward drive of the disk holder 5 has started. The disk support portion 5 is manually pushed into the housing 2 from the protruding position shown in FIG. 1 to the position shown in FIG. However, by setting the timing at which the rearward movement of the second carry 33 starts as described above, even if excessive force is applied during manual pushing, it will not have an adverse effect on the second carry 33 and other members. will disappear.

In this embodiment, when the disk holding part 5 protrudes outside the housing 2, that is, when the disk holding part is made to carry a disk, the second carrier 33
Although the position of the second carry 33 in this state is approximately at the center of the disc holder, it is also possible to position the second carry 33 near the end of the disc holder in the protruding direction.

With this configuration, compact disc 1
8 on the second carry 33, it is no longer necessary to draw out the disk holding part 5 to the outside of the housing 2, and the operability is improved.

As shown in FIGS. 4 and 5, the disk holding section 5
A pair of rectangular plate-shaped support members 4 sandwich the
4, and the disk supporting portion 5 supports the disk supporting surface 1 of the first spindle motor 13 by means of both supporting members.
It is supported so as to be movable in a direction parallel to 3a, in this case, in the front-back direction (arrow Y direction and the opposite direction).

As is clear from FIG. 5, a pair of bins 44a are protruded from the outer surface of the support member 44 and are spaced apart in the front-rear direction, and both bins are formed on the chassis 8.

The guide hole 8a is movably inserted into the guide hole 8a. That is, the support member 44 is adapted to move along the L-shaped interior hole.

The single-shaped guide hole 8a includes a parallel portion 8b extending parallel to the disk supporting surface 13a of the first spindle motor 13, and a parallel portion 8b extending parallel to the disk supporting surface 13a continuous to the rear end of the parallel portion.
and a vertical portion 8C extending perpendicularly to the vertical direction. A pair of left and right rectangular plate-shaped moving members 45 are provided so as to sandwich the single-shaped guide hole 8a together with the support member 44. Each moving member 45 is attached to the chassis 8 so as to be movable in the front-rear direction (the direction of arrow Y and the opposite direction).

A bottle 44a protruding from each support member 44 is attached to the chassis 8.
It is slidably engaged with a cam hole 45a formed in each moving member 45 through a single-shaped guide hole 8a. Cam hole 4
5a is the disk supporting surface 13 of the first spindle motor 13;
A parallel portion 45b extending in the direction parallel to a, in this case, the front-back direction, and a slope that is continuous with the rear end of the parallel portion and slopes upward (in the direction of arrow Z) toward the rear (counter to the direction of arrow Y). It consists of a portion 45c. That is, when each movable member 45 moves in the front-rear direction with respect to the support member 44, the support member and the disk support portion 5 supported by the support member move in the vertical direction, that is, the disk support surface 13a of the first spindle motor 13. The cam hole 45a is formed to move in a direction perpendicular to the cam hole 45a.

As is clear from FIG. 5, a rack portion 45e is formed at the lower end portions of the pair of moving members 45, and a gear 47 meshes with the rack portion of one of the moving members. This gear 4
7 is another gear 48 that meshes with the gear 48, and a pulley 49 and a belt 5 that are integrally formed with a gear portion 49a that meshes with the gear 48.
0 and a small pulley 51, the output shaft of a motor 52 is connected to the output shaft of the motor 52. Although not shown, a gear 47 is located at one end of the l1ll! The other end of the attached shaft 53 reaches near the other moving member 45, and a gear that meshes with a rack formed on the moving member is fitted onto the other end. That is, as the gear 47 rotates, the pair of left and right moving members 45 move together.

The above gears 47, 48, pulley 49, and belt 50
The small pulley 51, motor 52, shaft 53, etc. constitute a driving means for driving the pair of moving members 45 in synchronization.

Further, the drive means, each support member 44, and the image movement member 4
5, the single-shaped guide hole 8a of the chassis 8, and peripheral small members related thereto constitute a drive mechanism for driving the disk holding section 5.

Although not shown, when the disk holder 5 is moved in the storage direction (rearward) into the housing 2 and reaches the movement limit position relative to the support member 44, the disk holder 5 is locked relative to the support member. Locking means are provided. Further, so that the support member 44 is moved together with the movable member 45 in the storage direction of the disc holder, the pin 44a of the support member reaches the intersection of the parallel portion 8b and the vertical portion 8C of the single-shaped guide hole 8a. A locking/releasing means locks the supporting member to the moving member 45, releases the locked state when the bin 44a reaches the intersection, and locks the supporting member 44 to the chassis 8 only in the storing direction. It is provided.

These locking means and locking/releasing means, the disk carrying part 5, the carry moving mechanism (described above) comprising the slide member 35, etc., the chassis 8, the drive mechanism for lateral movement of the disk carrying part including the moving member 45, etc. (described above); ) and related peripheral small members constitute a disc transport mechanism that transports the disc to be played to the performance position, that is, onto each spindle motor.

As shown in FIG. 5, another rack section 45f is formed at the lower end of the moving member 45 behind the rack section 45e. A gear 56 for operating a rotary potentiometer 55 is meshed with this rack portion 45f. Note that the potentiometer 55 and the gear 56 are attached to a bracket portion 8e that projects from the lower end of the chassis 8. Although not shown, the control circuit that controls the operation of the disc player includes a potentiometer 5.
A comparator is built in to compare the terminal voltage of No. 5 with the reference voltage. As also shown in FIG. 5, the front and rear ends of the movable member 45 are engaged with the front and rear ends of the chassis 8, respectively, so that the movable member, and hence the disk carrier 5, can move to its starting position. A pair of detection switches 57 and 58 are attached to detect the movement end position. These potentiometers 55, comparators (
(described above), the detection switches 57 and 58, etc., constitute a position detection means for detecting the position of the disk holder 5.

Although it is possible to detect the position of the moving member 45, and hence the disk holder 5, using only the potentiometer 55, the position detection accuracy of the disk holder 5 can be improved by using the detection switches 57 and 58 together as described above. In addition to improving the performance, the configuration of the above-mentioned dividing circuit can also be simplified. Further, although the gear 56 for operating the potentiometer 55 is meshed with the rack portion 45f of the moving member 45, the gear may be configured to mesh with the gear 47 or the gear 48. Furthermore, although a rotary type potentiometer is used in the disc player, it is also possible to use a linear displacement type so-called slide volume.

Next, a description will be given of the clamp mechanism that clamps the disc transported to the performance position.

As shown in FIGS. 4 and 5, a pair of substantially rectangular plate-shaped holding members 61 and 62 are provided within the housing 2, spaced apart from each other in the front and rear, and extending in the left and right directions. Each of the holding members 61 and 62 is swingably attached to the support member 44 via a pin 44C at each front end. Further, the swing direction of each holding member is substantially perpendicular to the disk supporting surface 13a of the first spindle motor 13. However, the arcuate notches 61a and 62a formed at the rear end of each holding member 61 and 62 cause a slight WIIlI
This allows the downward swinging of the holding members 61 and 62 to be restricted within a predetermined range.
The structure is such that a swinging operation can be performed using the fulcrum as the fulcrum. As shown in FIG. 6, on the lower surface of each of the holding members 61 and 62, a disk-shaped first restraint member is provided which cooperates with one of the first and second spindle motors 13 and 19, respectively, to perform a disk clamping action. The member 63 and the second pressing member 64 are each rotatably attached. As shown in FIG. 5, coil springs 65 and 66 are connected to the rear ends of each of the holding members 61 and 62, respectively. Each of the coil springs has a first and a second pressing member 63,64, respectively.
The holding members 61 and 62 are biased toward the second spindle motors 13 and 19.

As shown in FIG. 5, the holding member 6 located at the rear
A roller 62b is provided at the side end of the moving member 45, and the roller 62b engages with a timing cam portion 45h formed at the upper end of the moving member 45. The shape of the timing cam portion 45h and the cam hole 45 provided in the moving member 45
The timing of attachment and detachment of the first and second pressing members 63.64 to the first and second spindle motors 13.19 is set by appropriately adjusting the shape of a and the amount of movement of the moving member. There is. That is, the first and second suppressing members are individually attached to and detached from the first and second spindle motors 13 and 19, respectively. Note that, as is clear from the above description, the first and second suppressing members 63.
No special driving source is provided for moving the holding members 61 and 64 together with the holding members 61 and 62, and this moving operation is performed by applying driving force from the disk transport mechanism described above.

The above-mentioned first and second pressing members 63, 64, holding members 61, 62 that hold these members, coil springs 65, 66 as biasing means, etc., are carried to the playing position, that is, onto each spindle motor. A clamp mechanism is configured to clamp the disk.

Next, the operation of the disc player configured as described above will be explained in the first
The performance procedure will be briefly explained with reference to FIGS. 0 to 16.

First, the case where the optical video disc 14 (see FIG. 2) is played will be explained. As shown in FIG. 1, the disc holder 5 is completely projected out of the housing 2, and an optical video disc is placed at a predetermined position on the disc holder. It should be noted that the operation of protruding the disk holder 5 out of the housing is performed by following the completely opposite process of the storage operation described below, and therefore will not be described in detail.

Once the optical video disc is placed on the disc holder 5, the disc holder 5 is manually pushed into the housing 2 to the position shown in FIGS. 4-6. When the disk carrier 5 reaches this position, a predetermined detection switch is activated, and the motor 52 shown in FIG. 5 starts rotating. At this time, the disk holding section 5 is attached to the support member 44.
The locking means puts the locking state into a locked state and begins to be pulled in integrally. Therefore, as shown in Figure 12,
The disk carrier 5 moves rearward (in the direction opposite to the arrow Y) and is completely housed within the housing 2. Further, as shown in FIGS. 10 and 11, the second carry 33 is moved to a position corresponding to the second spindle motor 19.

Further, at this time, the diameter of the disc to be played is determined by a determining means (not shown).

When it is determined that the disk being conveyed is the optical video disk 14, the moving member 45 is further driven backward by a predetermined distance, as shown in FIG. Therefore,
The disc carrier 5 is lowered together with the support member 44, and the optical video disc 14 is placed on the first spindle motor 13 and clamped as shown in FIG.

In this state, the motor 52 stops, and the disc can be played.

When the loading of the optical video disc 14 is completed, the first spindle motor 13 rotates to move the carriage 15.
(See FIG. 2) begins to operate and disc performance begins.

When a detection switch (not shown) detects that the performance has ended and the carriage 15 has reached its movement limit position,
The carriage 15 and the first spindle motor 13 are stopped, and at the same time, the motor 52 starts its reverse operation. Therefore,
As mentioned before, the disc support part 5 protrudes to the outside of the housing 2 by following the process completely opposite to the above, the lock is released, and the disc support part 5 becomes free in the front and back direction with respect to the support member 44. , the state shown in FIGS. 4 to 6 is reached. Thereafter, the optical video disc 14 is recovered by manually pulling out the disc holder 5.

The case where the disc to be played is the compact disc 18 (see FIG. 2) will be explained. The operation of the disc transport mechanism is exactly the same as that for the optical video disc 14 up to the state shown in FIG. The above-mentioned discrimination means determines that the disc to be played is Compact Disc 1.
8, the moving member 45 is driven further backward than the state shown in FIG. 13, and reaches the state shown in FIG. 15. The compact disc 18 is thus clamped on the second spindle motor 19, as shown in FIG. Note that the second
Movement of the spindle motor 19 is performed in response to a signal from the above-mentioned determining means.

In this disc player, the second spindle motor 19 is moved in parallel by the swinging of the swinging member 21, but as shown in FIG. A rack portion 70a is formed to mesh with the cough small gear portion, and the disk supporting surface 1 of the first spindle motor 13 is formed as a gear.
A configuration may also be adopted in which a moving member 70 capable of linearly reciprocating in a direction parallel to 3a is provided, and the second spindle motor 19 is attached to this moving member 70. This configuration is also extremely simple, making it easier to reduce the cost of the entire disc player.

As described in detail above, the disc player according to the present invention includes a first spindle motor fixed on a predetermined support mechanism for rotationally driving, for example, an optical video disc; a carriage that moves along a plane including a disk carrying surface of the first spindle motor, and a second spindle motor that rotationally drives the compact disk, the second spindle motor having a disk carrying surface that is the same as the disk carrying surface of the first spindle motor. a first position located on substantially the same plane and in which the distance between the centers of rotation with the first spindle motor is greater than the sum of the radius of the disk to be supported and the radius of the disk supporting surface of the first spindle motor; The second spindle motor is movable between a predetermined range of a plane including the disk supporting surface of the spindle motor and a second position away from the movement locus of the carriage, and includes a moving means for moving the second spindle motor.

Therefore, compared to a disc player in which all of the spindle motors are moved, the space provided within the player housing for the movement of the spindle motors is smaller, making it easier to downsize the disc player as a whole. It has become.

Further, the moving means for moving the second spindle motor can be of low output and small size, and furthermore, the positioning mechanism for positioning the second spindle motor at the first position, that is, the disk rotation drive position is also required. Since it is only necessary to provide one disc player, it is easier to reduce the size of the entire disc player, and the structure is simple.

Further, in the disc player according to the present invention, the second spindle motor is moved in parallel without changing the direction of the rotation center axis of the second spindle motor.

Therefore, the direction of movement of the second spindle motor is particularly set in the first direction.
When parallel to the disk supporting surface of the spindle motor,
The dimensions of the player in the direction perpendicular to the disk holding surface can be made comparable to the dimensions of a player having only the first spindle motor, making it possible to make the disk player thinner. Moreover, since positioning in the direction perpendicular to the moving direction of the second spindle motor is not necessary for the above-described positioning mechanism, the configuration can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire disc player according to the present invention, Fig. 2 is a perspective view of each spindle motor and its surrounding members, and Fig. 3 is a plan view of the first and second spindle motors and their surrounding members. 4 and 5 are a plan view and a side view of the internal structure of the disc player, respectively. Partial detailed drawings of the structure, Figures 10 to 1
Figure 6 is a diagram for explaining the operation of the disc player, Figure 17 is a diagram showing a partial modification of the disc player, and Figures 18 and 19 are for explaining the main parts of the disc player that has already been developed. This is a diagram for Explanation of symbols of main parts 2...Housing 2a...Contact portion 3...Front panel 3a...Opening 5...Disc Carrying part 6...Door 8...Chassis 8a...Single-shaped guide hole 8b...Parallel portion 8C...Vertical portion 8e. ...Bracket portion 10...Base member 13...First spindle motor 13a...
... Disc holding surface 14 ... Optical video disc 15 ...
・Carriage 16.34...Guide shaft 18...
・Compact disk 19...Second spindle motor 19a...
... Disk supporting surface 20 ... Support bin 21 ... Swinging member 22 ... Worm wheel 23 ... Worm 24.26.49 ... ...Pulley 25.50...Belt 27.52...Motor 32...First carry 33...Second carry 33e, 35a, 45e, 45f ...Rack portion 35...Slide member 36.65.66...Coil spring 38.
47.48.56.71...Gear 39...
...Large gear 40...Small gear 41...
...Ring spring 44...Supporting members 44a, 44c, 44d--Bin 45...
...Moving member 45a...Cam hole 45h...Timing cam portion 51...Small pulley 53...Shaft 55...Potentiometer 57.58...Detection switch 61.62...Holding member 63...First pressing member 64...Second pressing member

Claims (3)

[Claims] (1) A support mechanism, a first spindle motor fixedly installed on the support mechanism, a carriage that carries a pickup means and moves along a plane including a disk support surface of the first spindle motor, and a disk support. The surface is located substantially on the same plane as the disk supporting surface of the first spindle motor, and the distance between the centers of rotation with the first spindle motor is equal to the radius of the disk to be supported and the radius of the disk supporting surface of the first spindle motor. a second spindle motor that is movable between a first position that is larger than the sum of the two spindle motors and a second position that is separated from a predetermined range of a plane including a disk carrying surface of the first spindle motor and a movement locus of the carriage; a moving means for moving a second spindle motor, wherein the movement of the second spindle motor is performed by parallel movement without changing the direction of the central axis of rotation of the second spindle motor. (2) The moving means includes a swinging member that is swingably provided in a plane parallel to the disk supporting surface of the first spindle motor and holds the second spindle motor at its free end; and a driving force applying means for applying a driving force to the member.
Disc player as described in section. (3) The moving means includes a moving member that is provided to be capable of reciprocating linearly in a direction parallel to the disk supporting surface of the first spindle motor and that holds the second spindle motor, and a moving member that applies a driving force to the moving member. 2. The disc player according to claim 1, further comprising driving force applying means for applying a driving force.