JPH0363153B2 - - Google Patents

Description

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

BACKGROUND ART Recently, disc players that can play both optical video discs and compact discs have been developed. In order to rotate these disks, a turntable that supports the disk and a spindle motor that rotates the turntable are used, but for optical video disks and compact disks, the center hole diameter, clamping area, and signal start The dimensions specified by the disk standards, such as the diameter, are greatly different, and it has been difficult to create a turntable that can hold both disks in common. In addition, in order to accurately trace the pits (dents) carved in micron order on the disk, it is necessary to have extremely accurate pickup performance and disk rotation control. Since the playback rotation speed of an optical video disk, which has a larger outer diameter and weight than a compact disk, is relatively high, a spindle motor that rotates the disk 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 have a low playback rotation speed.When driving them in rotation, they are susceptible to cogging and torque fluctuations, and extremely high-precision rotation control is required. need to be done.

For the reasons mentioned above, in disc players that have already been developed, the spindle motors are not shared, but dedicated spindle motors are provided for each of the optical video disc and the compact disc. Although optical video discs and compact discs have the above-mentioned differences, both use a transparent resin surface to focus a laser beam onto a pit and read information signals from the reflected light. Therefore, a format is adopted in which information signals from both disks are read by a single pickup.

FIG. 19a schematically shows the main parts of a disc player that has already been developed. As shown, a first turntable 202 carries an optical video disk 201 and is driven to rotate by a spindle motor (not shown), and a first turntable 202 carries an optical video disk 201 and is driven to rotate by a spindle motor (not shown). The second turntables 203 are arranged so that their rotational central axes are located in the same plane, and are capable of reciprocating in the direction of arrow Y and in the opposite direction (for example, in the front-rear direction of the disk player). . Although not shown, moving means for moving the first turntable 202 and the second turntable 203 is provided. Note that the position of the first turntable 202 shown in FIG. 19a is the disk rotation drive position of each turntable, and in this case, the arrow Y The carriage 204 is configured to reciprocate in the direction of the arrow X perpendicular to the direction and in the opposite direction (left-right direction of the disk player). Carriage 20
Reference numeral 4 incorporates an optical pickup means including an objective lens 205.

FIG. 19b shows the state when playing the compact disc 206, in which the second turntable 203 is moved to the disc rotation driving position, and the first turntable 202 is removed from this position. There is.

In a disk player with such a configuration, the first
Housing 202 and second turntable 203
In order to perform the reciprocating motion, a large space must be provided within the player housing, making the entire disc player large. Furthermore, the moving means for reciprocating the two turntables needs to have a large output, which also causes the disk player to become larger. Furthermore, since the relative positional dimension with the optical pickup means needs to be highly accurate, both turntables must be accurately positioned at the disk rotation drive position, and a positioning mechanism for this is required for each turn. Each table was installed individually, making the structure complicated.

Although this is separate from the above discussion, a clamping mechanism is provided within the disc player to clamp the disc placed on the playing position, that is, the turntable. Specifically, the clamp mechanism is
It includes, for example, a disc-shaped pressing member that cooperates with the turntable to perform a disk clamping action, and a detachment mechanism that includes a holding member that rotatably holds the pressing member and allows the pressing member to be attached to and removed from the turntable. In already developed disk players, this pressing member is shared by each of the above-mentioned turntables, and only one is provided. As mentioned above, optical video disc 20
1 and the compact disk 206 are different in diameter, weight, and reproduction rotation speed, the appropriate clamping force for each disk is naturally different. Incidentally, the clamping force required to clamp an optical video disc is approximately five times that of a compact disc. However, the disc players that have already been developed only have one pressing member.
Clamping force is set to suit optical video discs. Therefore, there is a problem in that an appropriate clamping force cannot be applied to the compact disk, and an excessive clamping force is applied to the spindle motor. Therefore, it is necessary to use a spindle motor for compact discs that has the same mechanical strength as the spindle motor for optical video discs and has durability against thrust loads. He was inviting me. Furthermore, the range pressed by the pressing member, that is, the size of the clamp area, is different between optical video discs and compact discs, but it is difficult to fit the clamp area of each disc with a single pressing member. It was hot.

Summary of the Invention The present invention has been made in view of the above points, and its purpose is to provide a device that can be easily miniaturized and cost-reduced, has a simple structure, and is capable of clamping various types of disks with different specifications. To provide a disk player which can optimize the force and adapt the shape of a pressing member forming a disk clamp to the clamping area of various disks.

The disc player according to the present invention includes a playing means;
a clamping mechanism for clamping a disc placed in a playing position, the playing means being fixed on a predetermined support mechanism and carrying a first turntable for rotationally driving, for example, an optical video disc, and a pickup means. and a carriage that moves along a plane including the disk supporting surface of the first turntable, and a second turntable that rotationally drives the compact disk, the second turntable having a disk supporting surface that is parallel to the first turntable. A first turntable which is located substantially on the same plane as the disk supporting surface of the table and whose center-of-rotation distance with the first turntable is larger than the sum of the radius of the disk to be supported and the radius of the disk supporting surface of the first turntable. 1 position and the first
The turntable is movable between a predetermined range of a plane including the disk carrying surface of the turntable and a second position away from the movement locus of the carriage, and further includes a moving means for moving the second turntable, The clamp mechanism includes a support member movably provided to both the first and second turntables, a drive means for moving the support member, and a drive means coupled to the support member to move the support member to the first and second turntables. first and second pressing members that cooperate with each of the tables to clamp the disk; and a stopper that engages only the second pressing member and prohibits the second pressing member from approaching the second turntable. It is characterized by consisting of.

Embodiment Hereinafter, a disk 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 carrying part 5 can protrude to the outside of the housing. ing. However, left and right here refers to arrow Y.
It is directed towards the front as indicated by the arrow
The direction is to the left. Further, arrow Z indicates upward.
A door 6 for closing the opening is provided near the opening 3a. In addition, front panel 3
A group of switches 7 are provided on the top for operating the disc player.

A chassis 8 is provided within the housing 2, and a base member 10 shown in FIG. 2 is fixed to a predetermined position on the lower surface of the chassis by screws 11 or the like. These base members 10 and screws 11
etc. are collectively referred to as the support mechanism. One end of the base member 10 has a first turntable 13a attached to its output shaft.
A first spindle motor 13b fitted with the first spindle motor 13b is fixedly installed. This first spindle motor 13b
is for rotating an optical video disk 14 having a diameter of approximately 30 cm or 20 cm,
Suitable for high-load, high-speed rotation. A carriage 15 carrying an optical pickup means is disposed behind the first spindle motor 13b, and is mounted on the base member 10 in order to move along a plane including the disk carrying surface 13c of the first turntable 13a. It is guided by a guide shaft 16 provided at.

A second turntable 19a is fitted onto the output shaft of the base member 10, and a second turntable 19a is fitted on the output shaft of the base member 10 for rotating a compact disk 18 having a diameter of about 12 cm.
A spindle motor 19b is provided. Second
The turntable 19a 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 refers to the disk carrying surface 1 of the second turntable.
9c is on substantially the same plane as the disk supporting surface 13c of the first turntable 13a, and the distance between the centers of rotation with the first turntable 13a is the radius D ₂ /2 of the compact disk 18 to be supported (however,
D ₂ is the diameter of the compact disk 18) and the first
Disk supporting surface radius R ₁ of turntable 13a
It is a position that is greater than the sum of . That is, the first
The outer periphery of the compact disc 18 placed on the second turntable 19a at this position is prevented from coming into contact with the first turntable 13a. Further, the second position is a position away from the plane including the disk supporting surface 13c of the first turntable 13a and the movement trajectory of the carriage 15. However, although the second position is different from the detached position shown in the figure, the first turntable 1
Even if it is within a plane including the disk supporting surface 13c of the turntable 3a, it is sufficient that it is outside the diameter of the optical video disk 14 placed on the first turntable 13a. As is clear from the figure, the movement of the second turntable 19a is performed by rotational movement that changes the direction of the rotation center axis of the second turntable. The second position is below the plane including the disk supporting surface 13c of the first turntable 13a and on the side of the movement trajectory of the carriage 15. There is no other mechanism at this position, and by setting the second position at this position, the so-called dead space is effectively utilized, which helps reduce the size of the disc player as a whole, especially in the direction of the arrow Z. It is becoming easier to make devices smaller and thinner. Note that it is also possible to set the second position below the plane including the disk supporting surface 13c of the first turntable 13a and the movement trajectory of the carriage 15. In this case, the second position can be set below the plane including the disk supporting surface 13c of the first turntable 13a. It becomes easier to downsize. Furthermore, in the illustrated second position, the direction of the rotation center axis of the second turntable 19a is perpendicular to the direction of movement of the disk carrying surface 13c of the first turntable 13a and the carriage 15, that is, approximately in the direction of arrow X. However, it is also possible to set the second position so that the rotation center axis coincides with the direction of arrow Y, for example.

The moving means for moving the second turntable 19a will be explained based on FIGS. 3a to 3c.

As shown, the second spindle motor 19
b has a leg member 19d, which is rotatably attached to the base member 10 via a support pin 20 at the distal end of the leg member. Second
A sector gear 21 is located near the spindle motor 19b.
is provided. The sector gear 21 is a gear body 21
a, an intermediate member 21c which is separate from the gear body and is rotatable about the same axis 21b as the gear body, and is interposed between the gear body and the intermediate member to couple them together. It consists of a coil spring 21d which is a spring member. A lever member 22 is rotatably attached at one end to the rotating end of the intermediate member 21c, which is a component of the sector gear 21, and the other end of the lever member is freely connected to the second spindle motor 19b. It is pivotally attached to the end via a pin 22a. Gear body 21 of sector gear 21
A is a worm wheel 25 with which a gear 23 meshes.
It is integrally molded with. Warm 24 is
It is connected to the output shaft of a motor 30 via a pair of pulleys 27, 28 and a belt 29. These gears 23, worm 24, worm wheel 25,
The pulleys 27 and 28, the belt 29, and the motor 30 constitute a rotational force applying means that applies rotational force to the fan-shaped gear 21. Further, the rotation imparting means, the sector gear 21, the lever member 22, and the like constitute a moving means for rotationally moving the second turntable 19a.

The moving means, the first and second turntables 13a and 19a, a support mechanism including a base member 10 that supports both turntables, a carriage 15 including an optical pickup means, and peripheral small parts related thereto. These members constitute a playing means for performing disk performances.

Next, a description will be given of a disk conveyance mechanism that includes the aforementioned disk carrying section 5 and conveys a disk to be played to a performance position.

As shown in FIGS. 1 and 4, the disk carrying section 5 includes a first carrier 32 carrying the optical video disk 14 to be placed on the first turntable 13a, and a first carrier 32 carrying the optical video disk 14 to be placed on the second turntable 19a. It has a second carrier 33 for carrying the compact disc 18 to be placed thereon. Two circular shallow recesses 32a and 32b are formed concentrically on the upper surface of the first carrier 32, into which optical video disks having diameters of approximately 30 cm and 20 cm are inserted, respectively.
Further, on the upper surface of the second carrier 33, there is a circular recess 33a into which the compact disc 18 can be inserted, and a portion 33b which can be continuous with the circular recess provided in the first carrier 32 for an optical video disc with a diameter of 20 cm. is formed. A pair of left and right guide shafts 34 are provided at the lower part of the first carry 32 and extend in a plane parallel to the disk carrying surface 13c of the first turntable 13a, in this case, in the front-rear direction (direction of arrow Y and the opposite direction). The second carry 33 is slidably attached to both guide shafts. Note that FIGS. 1 and 4 show the state before the second carry 33 moves, and in this state, the circular recess 33a formed in the second carry 33 for fitting the compact disk
are located concentrically with respect to circular recesses 32a and 32b provided in the first carrier 32 for fitting an optical video disk. A pair of protrusions 33d are provided on both left and right sides of the second carry 33, and these protrusions 33d are attached to four locking portions 32d and 32e, two each, protruding from the lower surface of the first carry 32.
3d engages the first carrier 32.
Movement of the first carry 33 relative to the first carry 33 is restricted within a predetermined range.

As is clear from Fig. 4, the first carrier 32
A pair of slide members 35 extend in the front and back direction so as to sandwich the second carry 33 from left and right on the lower surface of the
are provided, and both slide members are capable of reciprocating within a predetermined range in the front-rear direction with respect to the first 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 given a bias force toward the rear (in the direction opposite to the arrow Y) by the coil springs. A rack portion 35a is formed on one side of each slide member 35 along the direction of movement, 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 provided on the same axis.
The small gear 40 has two gears 39 and 40, and is engaged with the rack portion 35a. large gear 39
is another rack part 33e provided on both left and right sides of the second carry 33 corresponding to the rack part 35a.
It meshes with.

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 of the slide member 35 comes into contact with the abutting part 2a during the rearward movement of the disk carrier 5, and as the disk carrier 5 moves further rearward from this state, the second carrier 33 is moved. It is configured to move rearward with respect to the first carry 32.

7 to 9 show the slide member 35 and the second
Components of the gear 38 interposed between the gear 33 and the carrier 33 are individually shown. 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. In some cases, the small gear 40 is the large gear 3.
9, it can be rotated within a predetermined range.
Further, a flange portion 39c is provided on the inner line of the fan-shaped opening 39b, and the hook portion 40a engages with the flange portion, thereby preventing the small gear 40 from falling off from the large gear 39. ing. large gear 39
A ring spring 41 shown in FIG. 9 is interposed between the small gear 40 and the small gear 40. One end of the ring spring 41 is locked 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 locked to a hook 40a of the small gear 40. has been done. That is, the large gear 39 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 Both gears rotate relative to each other. Note that, as is clear from the above-described configuration, when the disk supporting portion 5 protrudes outside the housing 2, the bias force of the coil spring 36 is applied to the second carrier 3 via the slide member 35 and the gear 38.
3, and the second carry is returned to the position shown in FIG.

The slide member 35 described above, the gear 38, and the rack portion 33e formed on the second carry 33,
The movement of the second carry 33 relative to the first carry 32 is controlled by the coil spring 36 serving as a bias force applying means.
A carry movement mechanism is configured to perform the projecting and retracting operation.

Here, by appropriately determining the position of the contact portion 2a protruding inside the housing 2 so that the rear end portion of the slide member 35 comes into contact with the first carrier 32,
The rearward movement of the second carry 33 relative to the disk carrier 33 is set to begin after the rearward movement of the disk carrier 5 is started. Disk holding part 5
is manually pushed into the housing 2 from the protruding position shown in FIG. 1 to the position shown in FIG. Yes, but
By determining 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, the second carry 33 and other members will not be adversely affected. .

In this embodiment, when the disk carrying part 5 protrudes outside the housing 2, that is, when the disk carrying part is made to carry a disk, the position of the second carrier 33 is approximately at the center of the disk carrying part. However, it is also possible to position the second carry 33 in this state near the end in the protruding direction of the disk holder. With this configuration, compact disk 1
8 on the second carry 33, there is no need to draw out the carrying part 5 to the outside of the housing 2, and operability is improved.

As shown in FIGS. 4 and 5, a pair of rectangular plate-shaped support members 44 are provided so as to sandwich the disk holder 5 on both the left and right sides, and the disk holder 5 is held between the two support members. in a direction parallel to the disk supporting surface 13c of the first turntable 13a,
In this case, it is supported so as to be movable in the front-rear direction (in the direction of arrow Y and the opposite direction). As is clear from FIG. 5, a pair of pins 44a are protruded from the outer surface of the support member 44 and are spaced apart in the front-rear direction. It is fitted so that it can be moved freely. That is, the support member 44 is adapted to move along the L-shaped guide hole.
The L-shaped guide hole 8a is connected to the first turntable 13a.
It consists of a parallel portion 8b extending parallel to the disk carrying surface 13c, and a vertical portion 8c continuing from the rear end of the parallel portion and extending perpendicularly to the disk carrying surface 13c. A pair of left and right rectangular plate-shaped moving members 45 are provided so as to sandwich the L-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-back direction (in the direction of arrow Y and the opposite direction). The pins 44a protruding from each support member 44 are
Through the L-shaped guide hole 8a of the chassis 8, it is slidably engaged with a cam hole 45a formed in each moving member 45. The cam hole 45a is arranged in a direction parallel to the disk supporting surface 13c of the first turntable 13a,
In this case, the parallel portion 45b extending in the front-rear direction
and an inclined portion 45c that is continuous with the rear end of the parallel portion and slopes upward (in the direction of arrow Z) toward the rear (in the direction opposite to arrow Y). 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 13c of the first turntable 13a. The cam hole 45a is formed to move in a direction perpendicular to the cam hole 45a.

As is clear from FIG. 5, the pair of moving members 4
A rack portion 45e is formed at the lower end of the moving member 5, and a gear 47 meshes with the rack portion of one of the moving members. This gear 47 includes another gear 48 that meshes with the gear 47, and a gear portion 49a that meshes with the gear 48.
is connected to the output shaft of a motor 52 via a pulley 49, a belt 50, and a small pulley 51 that are integrally formed. Although not shown, the gear 4
The other end of the shaft 53 fitted to one end of the shaft 53 reaches near the other moving member 45, and a gear that meshes with a rack formed on the moving member is fitted to the other end. It is worn. That is, gear 4
7 rotates, the pair of left and right moving members 45 move together.

The pair of moving members 4 are operated by the gears 47, 48, the pulley 49, the belt 50, the small pulley 51, the motor 52, the shaft 53, etc.
A driving means is configured to drive 5 in synchronization. Further, the drive means, each support member 44, both transfer members 45, and the L-shaped guide hole 8a of the chassis 8
A drive mechanism for driving the disk carrying section 5 is constituted by these and related peripheral small members.

Although not shown, when the disk holder 5 is moved in the storage direction (rearward) into the housing 2 and reaches the limit position of movement 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 disk carrier, the pin 44a of the support member reaches the intersection of the parallel portion 8b and the vertical portion 8c of the L-shaped guide hole 8a. A locking/releasing means is provided which locks the supporting member to the movable member 45, releases the locked state when the pin 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 lock/release means, the disk carrying part 5, the carry moving mechanism (described above) consisting of the slide member 35, etc., the drive mechanism for driving the disk carrying part (described above) including the chassis 8, the moving member 45, etc. ) and related peripheral small members constitute a disk conveyance mechanism that conveys the disk to be played to the performance position, that is, each turntable.

As shown in FIG. 5, another rack portion 45f is formed at the lower end of the moving member 45 behind the rack portion 45e. This rack part 45
A gear 56 for operating a rotary potentiometer 55 is meshed with f. The potentiometer 55 and the gear 56 are attached to a bracket portion 8e projecting from the lower end of the chassis 8. Although not shown, a comparator for comparing the terminal voltage of the potentiometer 55 with a reference voltage is incorporated in the control circuit that controls the operation of the disc player. As also shown in FIG. 5, near both front and rear ends of the chassis 8,
A pair of detection switches 57 and 58 are installed, which detect the movement start position and movement end position of the movement member 45, and therefore the disk carrier 5, by engagement of the front and rear ends of the movement member 45, respectively. ing. The potentiometer 55, the comparator (described above), the detection switches 57, 58, and the like constitute a position detection means for detecting the position of the disk holding section 5.

It should be noted that the moving member 45, and hence the disk holding section 5
It is possible to detect the position using only the potentiometer 55, but as mentioned above, the detection switch 5
By using 7 and 58 in combination, the accuracy of detecting the position of the disk holder 5 can be improved, and the configuration of the above-mentioned control circuit can also be simplified. Also, a gear 56 for operating the potentiometer 55
is meshed with the rack portion 45f of the moving member 45, but 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 a clamping mechanism that clamps the disc transported to the performance position.

As shown in FIGS. 4 and 5, inside the housing 2 are a pair of substantially rectangular plate-shaped holding members 6 that are spaced apart from each other in the front and back and extend in the left and right directions.
1 and 62 are provided. Each holding member 61,
62 is swingably attached to the support member 44 via a pin 44c at each front end. Further, the rocking direction of each holding member is approximately perpendicular to the disk supporting surface 13c of the first turntable 13a. However, each holding member 61, 6
2. Arc-shaped notches 61a and 62 formed at each rear end.
a is another pin 44d protruding from the support member 45;
The holding members 61 and 62 are fitted with a slight gap therebetween, thereby restricting the downward swinging of the holding members 61 and 62 within a predetermined range, and are configured to be able to swing around the pin 44c as a fulcrum. ing. As shown in FIG. 6, the lower surfaces of each holding member 61 and 62 are provided with first and second turntables 13a and 19a.
A disc-shaped first pressing member 63 and a second disc-shaped pressing member 64 are rotatably attached to each of the disc-shaped disc-shaped pressing members 63 and 64, which perform a disc-clamping action to clamp the disc. As shown in FIG.
Coil springs 65 at the rear ends of 1 and 62,
66 are connected to each other. Each of the coil springs has a first and a second pressing member 63, 64, respectively.
It acts to bias both the holding members 61, 62 in the direction toward the first and second turntables 13a, 19a.

As shown in FIG. 5, a roller 62b is provided at the side end of the holding member 62 disposed at the rear, and the roller 62b is attached to a timing cam portion 45h formed at the upper end of the moving member 45. engaged. The shape of this timing cam portion 45h, the shape of the cam hole 45a provided in the moving member 45,
By appropriately determining the amount of movement of the moving member, the first and second turntables 13a, 19a
The timing for attaching and detaching the first and second pressing members 63 and 64 relative to each other is set. That is, the first
The first and second pressing members are individually attached to and detached from the second turntables 13a and 19a. Note that, as is clear from the above explanation, no special drive source is provided for moving the first and second pressing members 63, 64 together with the holding members 61, 62, and this moving operation is performed as described above. This is done by applying driving force from the disk transport mechanism.

The first and second pressing members 63 and 64 described above,
The holding members 61 and 62 that hold these and the coil springs 65 and 66 as biasing means constitute a clamping mechanism that clamps the disks transported to the performance position, that is, each turntable.

Next, the operation of the disk player having the above-mentioned structure will be briefly explained along with the playing procedure with reference to FIGS. 10 to 16.

First, the case where the optical video disc 14 (see FIG. 2) is played will be explained. As shown in FIG.
The optical video disc is fully protruded to the outside and placed in a predetermined position on the disc holder. In addition,
The operation of protruding the disk carrier 5 out of the housing is performed by following the reversal of the retracting 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, whereby the motor 52 shown in FIG. 5 begins to rotate. At this time, the disk holding section 5 is attached to the support member 44.
The locking means causes the locking member to enter a locked state and begin to be pulled in integrally. Therefore, as shown in FIG.
direction) and is completely housed within the housing 2. Further, as shown in FIGS. 10 and 11, the second carrier 33 is connected to the second turntable 19.
It is moved to the position corresponding to a. Further, at this time, the diameter of the disc to be played is determined by a determining means (not shown).

The disk being transported is an optical video disk 14
When it is determined that this is the case, the moving member 45 is further driven backward by a predetermined distance, as shown in FIG. Therefore, the disc carrier 5 descends together with the support member 44, and the optical video disc 14
is placed on the first turntable 13a and clamped as shown in FIG. In this state, the motor 52 stops and disc performance becomes possible.

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

When the performance ends and a detection switch (not shown) detects that the carriage 15 has reached its travel limit position, the carriage 15 and the first spindle motor 13b are stopped, and at the same time the motor 52 is stopped.
starts reversing operation. Therefore, as mentioned before, the disk support part 5 protrudes to the outside of the housing 2 through a process completely opposite to that described above, the lock is released, and the disk support part 5 moves forward and backward with respect to the support member 44. It becomes free and becomes the state shown in FIGS. 4 to 6. After this, the disk holding section 5
Manually pull out the optical video disc 14
Collect.

The disc being played is Compact Disc 18.
(See FIG. 2) will be explained. The operation of the disk transport mechanism is exactly the same as that for the optical video disk 14 up to the state shown in FIG. When the above-mentioned determining means determines that the disc to be played is the compact disc 18, the moving member 45 is driven further rearward from the state shown in FIG. 13 to reach the state shown in FIG. 15. Thus, compact disk 18 is the 16th disk.
As shown in the figure, the second turntable 19a
It is clamped at the top. In addition, Fig. 14 and 1
The movement of the second turntable 19a shown in FIG. 6 is performed in response to a signal from the discrimination means.

In this disc player, the movement of the second carry 33 carrying the compact disc 18 with respect to the first carry 32 is performed by linear reciprocating motion; As shown in a and b, the second carry 33 may be a member that swings around the support shaft 70, and a gear 71 and a rack member 72 may be added to drive the second carry. .

In addition, in the disc player, when the optical video disc 14 is clamped, the second pressing member 64 for the compact disc 18 is prohibited from lowering by the timing cam portion 45h of the moving member 45 as a stopper, and is brought to the clamp release position. , and when the second pressing member 64 is in the clamp position, the first pressing member 64 for the optical video disc 14 is
Although the pressing member 63 is also set at the clamp position, the configuration is not limited to this, and the movable member 4
5 is provided with a timing cam portion corresponding to the first pressing member (a timing cam portion 45h is provided for the second pressing member 64). It is also possible to configure the member 63 to be moved to the unclamped position.

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

Therefore, compared to a disk player in which all of the turntables provided are movable,
The space provided within the player housing for moving the turntable is small, making it easier to downsize the entire disc player.

Further, the moving means for moving the second turntable can be of low power and small size, and further,
Since it is only necessary to provide one positioning mechanism for positioning the second turntable at the first position, that is, the disk rotation drive position, the overall size of the disk player can be further reduced, and the structure can be simplified. It's getting easier.

Further, in the disk player according to the present invention, a clamp mechanism for clamping the disk placed on the playing position, that is, the first and second turntables, cooperates with each of the first and second turntables to clamp the disk. The first one that acts as a clamp.
and a second pressing member, and the first and second pressing members are individually attached to and detached from the first and second turntables.

Therefore, the clamping force can be optimally set for various disks having different specifications, and the shape of the pressing member can be adapted to the clamping area of the various disks. Further, when one of the pressing members is pressing the disk placed on the second turntable, the other pressing member is pressed against the disk supporting surface of the first turntable. It is possible to suppress resonance of the other pressing member due to vibrations generated by the rotation of the second turntable.

Furthermore, in the disc player according to the present invention, the first and second pressing members are provided on a single support member that is moved relative to the first and second turntables by a driving means, and When the pressing member approaches the first turntable, the second pressing member is prohibited from approaching the second turntable by the stopper.

That is, the first and second pressing members are configured to be driven by the same driving means. Because of this configuration, the number of drive means is reduced compared to a structure in which each of the first and second pressing members is driven by an individual drive means, and the player is made smaller and costs are reduced. .

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the entire disc player according to the present invention, FIG. 2 is a perspective view of each turntable and its surrounding members, and FIGS. 3 a to 3 are plan views of the second turntable and its surrounding members. , a front view, a left side view, FIGS. 4 and 5 are respectively a plan view and a side view of the internal structure of the disc player, FIG. 6 is a diagram for explaining the clamp mechanism, and FIGS. FIG. 9 is a partial detailed view of the internal structure, FIGS. 10 to 16 are diagrams for explaining the operation of the disc player, and FIGS. 17 a, b and 18 a, b are diagrams of the disc player. Figures 19a and 19b, which show a partially modified example, are diagrams for explaining the main parts of an already developed disk player. Explanation of symbols of main parts, 2...Housing, 2a
...Abutting portion, 3...Front panel, 3a...Opening, 5...Disk supporting portion, 6...Door, 8...
... Chassis, 8a ... L-shaped guide hole, 8b ... Parallel part, 8c ... Vertical part, 8e ... Bracket part, 10 ... Base member, 13a ... First turntable, 13b ... First spindle motor, 1
3c... Disk supporting surface, 14... Optical video disc, 15... Carriage, 16, 34...
Guide shaft, 18...compact disk,
19a...Second turntable, 19b...Second turntable
Spindle motor, 19c...disc support surface,
20...Support pin, 21...Sector gear, 21a...
...Gear body, 21c...Intermediate member, 21a, 3
6, 65, 66...Coil spring, 22...
Lever members, 22a, 44a, 44c, 44d...
...Pin, 23, 38, 47, 48, 56, 71...
Gear, 24...Worm, 25...Worm wheel, 27,28,49...Pulley, 29,50
... Belt, 30, 52 ... Motor, 32 ... First carry, 33 ... Second carry, 33e, 3
5a, 45a, 45f...Rack part, 35...Slide member, 39...Large gear, 40...Small gear,
41...Ring spring, 44...Supporting member,
45...Moving member, 45a...Cam hole, 45h...
...Timing cam section, 51...Small pulley, 53...
...shaft, 55...potentiometer, 57,5
8...detection switch, 61, 62...holding member,
63...first pressing member, 64...second pressing member.

Claims (1)

[Claims] 1 A housing, a playing means provided in the housing, and a clamp mechanism for clamping a disc placed at a playing position, the playing means including a support mechanism and a second member fixedly mounted on the support mechanism. a carriage carrying a pick-up means and moving along a plane including the first turntable and a disk carrying surface, the disk carrying surface being substantially coplanar with the disk carrying surface of the first turntable; a first position in which the distance between rotation centers of the first turntable and the first turntable 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 turntable; a second turntable that is movable between a predetermined range of a plane including the plane and a second position away from a movement trajectory of the carriage; and a moving means for moving the second turntable, the clamping mechanism a support member movably provided with respect to both the first and second turntables; a drive means for moving the support member; and a drive means coupled to the support member and the first turntable.
and first and second pressing members that cooperate with each of the second turntables to clamp the disk, and that engage only the second pressing member to prevent it from approaching the second turntable. A disk player characterized by comprising a stopper.