JPS63164070A - Compatible disk player - Google Patents

Abstract

PURPOSE:To simplify a mechanism and to reduce its cost by providing one of two concentrically fixed turntables with three notched parts having the same pitch between them and allowing a pickup to reach the innermost circumferential position of a disk. CONSTITUTION:A compact disk is mounted on a turntable 12, whereas a concentric secondary turntable 14 to be mounted by an optical video disk is formed with three notched parts 14h in the circular direction with the same pitch between them. A carriage 16 mounting a pickup is guided by a guide shaft 17 and attainable to the innermost circumferential destination position 14h of the disk. Therefore, a disk clamping mechanism is then shared for the two tables, and also a turntable positioning adjuster mechanism is simplified accordingly so that the cost can be cut down.

Description

[Detailed description of the invention] Technical field The present invention relates to compatible disc players.

BACKGROUND ART Compatible disc players are already known that play back a plurality of types of discs, such as optical video discs and compact discs, which have different standards such as center hole size and rotation speed. A conventional example of a compatible disc player shown in FIGS. 11 to 14 is shown.

As shown in FIG. 11, the front surface of the housing 102 of the compatible disc player, that is, the front panel 103, has a rectangular opening extending in the left-right direction so that the disc holding part 105 can protrude outside the housing. A section 103a is provided. However, the left side here refers to the front direction indicated by the arrow Y, and the direction of the arrow X is the left side. Further, arrow Z indicates upward. A door 106 is provided near the opening 103a to close the opening. A group of switches 107 are provided on the front panel 103 to operate the disc player.

A chassis 108 is provided within the housing 102, and a base member 110 shown in FIG. 12 is fixed to a predetermined position on the lower surface of the chassis by screws 111 or the like. A first spindle motor 113 is fixed to one end of the base member 110. This first spindle motor 113 has a diameter of approximately 30CII+ or 20CI1.
It is for rotationally driving the optical video disk 114 of No. 1, and is suitable for high-load, high-speed rotation. A carriage 115 carrying an optical pickup means is arranged behind the first spindle motor 113, and
Disk supporting surface 113a of first spindle motor 113
The base member 110 is guided by a guide shaft 116 provided on the base member 110 so as to move along a plane containing the base member 110 .

Also provided on the base member 110 is a second spindle motor 119 for rotating a compact disc 118 having a diameter of approximately 120,111 mm.

The second spindle motor 119 is swingable (in the direction of arrow U) between a first position shown by a solid line in FIG. 12 and a second position shown by a two-dot chain line. This first
The position refers to the disk supporting surface 1 of the second spindle motor.
19a is on substantially the same plane as the disk supporting surface 113a of the first spindle motor 113, and the distance between the centers of rotation with the first spindle motor 113 is equal to the radius D2/2 of the compact disk 118 to be supported (however, D2 is the diameter of the compact disk 118) and the radius R1 of the disk supporting surface of the first spindle motor 113. That is, the compact disk 118 placed on the second spindle motor 119 in the first position
The outer periphery of the spindle motor 113 does not come into contact with the first spindle motor 113. Moreover, the above-mentioned second position is
Disk supporting surface 113a of first spindle motor 113
This is the position where the carriage 115 departs from the plane containing the plane and the movement locus of the carriage 115.

Although not shown, the second spindle motor 1
A mechanism is provided for swinging 19. Further, the above-mentioned disk holding section 105 carries a disk to be played and conveys it onto each spindle motor, and is provided with a mechanism (not shown) for moving this disk holding section 105. However, the disk holding section 10
5 is the disk supporting surface 11 of the first spindle motor 113
It is moved in two directions: a direction parallel to 3a (arrow Y direction and the opposite direction) and a direction perpendicular to this direction (arrow Z direction and the opposite direction).

As shown in FIG. 11, the disk holder 105 is
a first carrier 132 carrying an optical video disc 114 to be placed on a first spindle motor 113;
A compact disk 118 that is movable in the front-rear direction (direction of arrow Y and the opposite direction) with respect to the first carry 132 and is to be placed on the second spindle motor 119.
It has a second carry 133 that carries a. The upper surface of the first carry 132 has diameters of approximately 30cIn and 20cIn.
Two circular shallow recesses 132a and 132b are concentrically formed into which n optical video discs are respectively inserted. Further, the upper surface of the second carrier 133 has a circular recess 133a into which the compact disc 118 can be inserted, and the first carrier 133 has a circular recess 133a into which the compact disc 118 can be inserted.
A portion 133b that can be continuous with the circular recess 132b provided at 32 is formed.

Although not shown, the second carrier 133 is moved to the first carrier 13 in conjunction with the movement of the disk holding section 105.
A carry moving mechanism is provided to move the carry with respect to the 2.

As shown in FIG. 13, a pair of substantially rectangular plate-shaped holding members 161 and 162 are provided within the housing 102, spaced apart from each other in the front and rear, and extending in the left and right directions. Each of the holding members 161 and 162 is arranged in a direction perpendicular to the disk supporting surface 113a of the first spindle motor 113, that is, in an up-down direction (direction of arrow Z and the opposite direction).
It can be moved freely. The lower surface of each holding member 161 and 162 is provided with a first and second spindle motor 11.
A first pressing member 163 and a second suppressing member 164 each having a disk shape are rotatably attached to each of the disks 163 and 119 to perform a disk clamping action.

The above-described first and second suppressing members 163, 164, holding members 161, 162, etc. that hold them constitute a disk clamping mechanism that clamps the disk conveyed to the performance position, that is, each spindle motor. . Note that the first and second spindle motors 113.1
The first and second suppressing members 163 and 164 are attached and detached from each other individually.

Next, the operation of the disc player configured as described above will be briefly explained along with the playing procedure.

First, the case where the optical video disc 114 (see FIG. 12) is played will be described. As shown in FIG. 11, the disc holder 105 is completely projected out of the housing 102, and an optical video disc is placed at a predetermined position on the disc holder. Note that the disk holding section 105
The projecting operation to the outside of the housing is performed by following the completely opposite process to the retracting operation described below, and therefore will not be described in detail.

Place the optical video disc on the disc holder 105 J1
! Once placed, the disk carrier 105 is manually pushed into the housing 102. When the disc holder 105 reaches this position, a predetermined detection switch is activated and the disc holder 105 begins to be retracted. Therefore, the disk holding part 1
05 further moves rearward (in the direction opposite to the arrow Y) and is completely housed within the housing 102. Further, as shown in FIG. 14, the second carry 133 is connected to the second spindle motor 1.
It is moved to the position corresponding to 19. Also, 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 disc being transported is an optical video disc 114, the disc holder 105 is lowered, and the optical video disc 114 is placed on the first spindle motor 113 and clamped. . Also,
The second spindle motor 119 is located at a position indicated by a two-dot chain line in FIG. 12, that is, outside the movement trajectory of the carriage 115.

In this state, the disc can be played.

When the loading of the optical video disc 114 is completed, the first spindle motor 113 rotates, the carriage 115 (see FIG. 12) begins to move, and disc playback begins.

When the performance ends and a detection switch (not shown) detects that the carriage 115 has reached its movement limit position, the carriage 115 and the first spindle motor 113 are stopped, and the disk holding section 105 moves in the exact opposite manner to the above. The optical video disc 114 is then protruded out of the housing 102 and retrieved.

The disc to be played is compact disc 118 (first
(see FIG. 2), the operation is almost the same as in the case of the optical video disc 114 described above. When the aforementioned discrimination means determines that the disc to be played is the compact disc 118, the second spindle motor 119 is swung to the position shown by the solid line in FIG. It is clamped on the second spindle motor. Note that the second spindle motor 119 is oscillated in response to a signal from the above-described determining means.

In the above-mentioned disc player, the two spindle motors 113 and 119 are separately provided separated by a predetermined distance from each other, and therefore, as shown in FIG. 13, two sets of disc clamp mechanisms are provided for each spindle motor. It is provided. Therefore, the number of parts is large, leading to an increase in cost. Furthermore, it is necessary to set the positions of the two spindle motors 113 and 119 individually with high precision with respect to the carriage 115 carrying the optical pickup means, and to set the relative positions between these parts. The position adjustment mechanism has become complicated, which has also increased costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a compatible disc player at low cost.

A compatible disc player according to the present invention provides a first and a second dual drive source for a common rotary drive source including a spindle.
The present invention is characterized in that two turntables are attached concentrically, and the second turntable is provided with a notch that reaches the circumference including the innermost circumference position of the pickup.

Embodiments Hereinafter, a compatible 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 compatible 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 Z indicates upward. A door 6 is provided near the opening 3a to close the opening. A group of switches 7 are provided on the front panel 3 for operating the disc player.

A chassis 8 is provided within the housing 2, and a base member 1 shown in FIG.
0 is fixed with a screw or the like.

A variable rotation speed motor 11 shown in FIGS. 3 and 4 is provided on the base member 10. As shown in FIGS. As shown in FIG. 3, the motor includes a housing 11b, a core 11C,
a stator section consisting of radial bearings 11d and 11e;
Yoke 11g, spindle 11h, rotor magnet 1
11 and a rotor portion consisting of a boss 11j.

A first turntable 12 is attached to the tip of the spindle llh of the variable rotation speed motor 11. As shown in FIG. 4, the first turntable 12 supports a compact disc 13 (also shown in FIG. 1) having a diameter of 12c+n. A second turntable 14 is also attached to this spindle llh concentrically with the first turntable 12. Ru. Specifically, the second turntable 14 has a ball bearing 11 on the boss llj.
It is rotatably attached via k. A friction plate 14a is provided between the second turntable and the boss llj.
A clutch consisting of a coil spring 14b and a coil spring 14b is interposed, and the second turntable 14 is attached to and detached from the rotor portion including the boss llj by the clutch. As shown in FIG. 3, the second turntable 14
carries an optical video disk 15 (also shown in FIG. 1) having a diameter of 30 cm or 20 cm.

A protrusion 12c is formed on the disk supporting surface 12b of the first turntable 12. The protrusion 12c fits into the center hole of the compact disk 13 (shown in the first figure) to center the compact disk. Further, in the center of the second turntable 14, there is an adapter 14C that fits into the center hole of the optical video disc 15 (shown in the first figure) to center the optical video disc. It is provided separately from 14d. A coil spring 14e is arranged between the adapter 14c and the main body 14d.

As shown in FIGS. 2 to 4, a carriage 16 carrying an optical pickup means is disposed behind the first and second turntables 12. Support surfaces 12b, 14f
The base member 10 is moved back and forth along a plane containing
It is guided by a guide shaft 17 (second illustration) provided above. Also, as shown in Figure 2,
Motor 21. Pulley 22. Belt 23. A drive mechanism consisting of a pulley 24, a worm 25, etc. is provided,
The carriage 16 is moved by the drive mechanism.

As shown in FIG. 2, the disk holding portion of the second turntable 14 has three notches 14h in the circumferential direction that reach the virtual circumference (or cylinder) including the innermost circumferential arrival position of the above-mentioned pickup means. They are formed at equal pitches. Information recorded on the inner peripheral portion of the compact disc 13 placed on the first turntable 12 is read through this notch 14h.

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 5, the disk holding section 5
, circular first disk carrying surfaces 5a and 5b carrying an optical video disk 15 to be placed on the second turntable 14, and carrying a compact disk 13 to be placed on the first turntable 12. A circular second disk supporting surface 5c is provided. Two first disk supporting surfaces 5a and 5b and one second disk supporting surface 5c are formed concentrically at the center of the disk supporting section 5.

As shown in FIGS. 5 and 6, the disk holding section 5
A pair of rectangular plate-shaped support members 4 sandwiching the
4 are provided, and the disc carrier 5 supports each disc carrier surface 12b of the first and second turntables 12.14 by means of the support members.

14 [, in this case, the front-back direction (arrow Y direction and the opposite direction). As is clear from FIGS. 5 and 6, the support member 44
A pair of pins 44 are provided on the outer surface of the
A is provided in a protruding manner, and both bottles are movably inserted into an L-shaped guide hole 8a formed in the chassis 8. In other words, the support member 44 is adapted to move along the L-shaped guide hole. The L-shaped guide hole 8a has a parallel portion 8b extending parallel to the disk supporting surfaces 12b, 14f of the first and second turntables 12.14;
Continuing from the rear end of the parallel portion, there is a vertical portion 8c extending perpendicularly to each of the disk supporting surfaces. 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 4
Reference numeral 5 is attached to the chassis 8 so as to be movable in the front-rear direction (in the direction of arrow Y and the opposite direction). A pin 44a protruding from each support member 44 is slidably engaged with a cam hole 45a formed in each moving member 45 through an L-shaped guide hole 8a of the chassis 8. Cam hole 45
a is the disk supporting surface 12b of the first and second turntables 12.14;

14f, in this case, a parallel portion 45b extending in the front-rear 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 holding part 5 supported by the support member move in the vertical direction, that is, the first and second
Disk carrying surface 12b, 1 of turntable 12.14
The cam hole 45a is formed to move in a direction perpendicular to the cam hole 4f.

As is clear from FIG. 6, 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. A pulley 49 with an integrally molded gear portion 49a that meshes with the gear 48. It is connected to the output shaft of a motor 52 via a belt 50 and a small pulley 51. Although not shown, the gear 47
The other end of the shaft 53 fitted to one end reaches the vicinity of the other moving member 45, and a gear that meshes with a rack formed on the moving member is fitted to the other end. has been done. That is, by rotating the gear 47,
The pair of left and right moving members 45 are designed to 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.

In addition, the drive means, each support member 44, and both pillar moving members 4
5, the L-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 L-shaped guide hole 8a. The support member is locked to the moving member 45, and when the pin 44a reaches the intersection, the locked state is released and the support member 4
A locking/unlocking means is provided for locking the housing 4 to the chassis 8 only in the storing direction.

These locking means, locking/releasing means, the disk holding part 5, the chassis 8, the drive mechanism for moving the disk holding part laterally (described above) including the moving member 45, etc., and the peripheral small parts related to these, allow the performance to be performed. A disc transport mechanism is constructed to transport a disc to be played to a position, that is, on each turntable.

As shown in FIG. 6, 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 shown in FIG. 6, 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 therefore 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. comparator(
(described above), the detection switches 57 and 58, etc., constitute a position detection means for detecting the position of the disk holder 5.

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

As shown in FIGS. 5 and 6, a substantially rectangular plate-shaped holding member 61 extending in the left-right direction is provided in the housing 2.
is provided. The holding member 61 is swingably attached to the support member 44 via a pin 44c at its front end. Further, the direction in which the holding member swings is substantially perpendicular to the disk supporting surface of each of the turntables described above. However, the arcuate notch 61a formed at the rear end of the holding member 61 fits into the other pin 44d protruding from the support member 45 with a small gap, so that
The downward swinging of the holding member 61 is regulated within a predetermined range,
It is configured to be able to swing around the pin 44c as a fulcrum. As shown in FIG. 7, on the lower surface of the holding member 61, there is a disc-shaped suppressing member 6 that cooperates with the first and second turntables 12, 14 to perform a disc clamping action.
3 is rotatably attached.

Note that the pressing member 63 is also shown in FIGS. 3 and 4.

The above-mentioned suppressing member 63 and the holding member 61 that holds it
The disc clamping mechanism which clamps the disc conveyed to the performance position, that is, each turntable, is constituted by these and related peripheral small members.

8 and 9 show means for controlling the rotation stop position of the second turntable 14 described above. As shown in FIGS. 3, 4, and 8, three slits 14j are formed in the second turntable 14, corresponding to the three notches 14h formed in the disk holder. The optical sensor 70 is for detecting each of these slits 14j. As shown in FIG. 9, the detection signal emitted from the optical sensor 70 is transmitted to the motor control circuit 71, which controls the equalizer amplifier 7.
2 and the driver 73, the rotation stop position of the variable rotation speed motor 11 is controlled.

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 Figure 0.

First, the case where the optical video disc 15 (see FIG. 1) is played will be described. As shown in FIG. 1, the disc holder 5 is completely projected out of the housing 2, and the optical video disc 1 is placed in a predetermined position on the disc holder.
Place 5. It should be noted that the operation of protruding the disk holder 5 out of the housing is performed by following a process completely opposite to the retracting operation described below, and therefore will not be described in detail.

The optical video disc 15 is placed on the disc holder 5.
Then, manually push the disk carrier 5 into the housing 2 to the position shown in FIGS. 5 to 47.

When the disc holder 5 reaches this position, a predetermined detection switch is activated, and the motor 52b shown in FIG. The disk holder 5 enters a locked state and begins to be pulled in in one direction.Thus, the disk holder 5 moves rearward (in the direction opposite to the arrow Y direction) and is completely housed within the housing 2, and then moves downward as shown in FIG. Therefore, the optical video disc 15 is moved to m3.
As shown in the figure, ltA[
and clamped. At this time, the diameter of the disc to be played is determined by a determining means (not shown). In this state, the motor 52 stops, and the disc can be played. Furthermore, the friction plate 1 shown in FIG.
4a and a coil spring 14b, the second turntable 14 is connected to the rotor portion including the boss 113.

When the loading of the optical video disc 15 is completed, the second turntable 14 is rotated together with the tAl turntable 12, and the carriage 16 (Fig.
(see figure) begins to operate and disc playback begins. However, the rotation speed of each turntable is adapted to the second turntable 14.

When a detection switch (not shown) detects that the performance has ended and the carriage 16 has reached its movement limit position,
The carriage 16 and the second turntable 14 (as well as the first turntable 12) are stopped, and at the same time the motor 52 starts a reversing operation.

Therefore, as mentioned before, the disk supporting part 5 protrudes to the outside of the housing 2 by following a process completely opposite to that described above.
The state shown in FIGS. 5 to 7 is reached. Thereafter, the optical video disc 15 is recovered by manually pulling out the disc holder 5.

When the disc to be played is the compact disc 13 (see FIG. 1), the disc transport operation is almost the same as that for the optical video disc 15 described above. After the compact disc 13 is placed on the first turntable 12, the first turntable is moved to the '! The disc is driven to rotate at a rotation speed suitable for the J1 turntable, and disc performance begins.

However, the second turntable 14 does not rotate because the clutch is released. The recovery of the disc is the same as in the case of the optical video disc 15 described above.

Incidentally, the rotation speed of the aforementioned variable rotation speed motor 11 is set by a control circuit (not shown).

In addition, as shown in FIG. 2, the compact disc 1
3, the second turntable is stopped so that one of the three notches 14h formed in the disc holding portion of the second turntable 14 is aligned with the movement path of the pickup means. ing.

Effects of the Invention As detailed above, in the compatible disc player according to the present invention, two types of turntables, 'N41 and second, are attached concentrically to a common rotational drive source including a spindle, and the tJ2 turntable is attached to the tJ2 turntable. A notch (14h) that reaches the circumference including the inner circumference arrival position during pickup
) has been established.

Therefore, it is sufficient to provide only one set of disk clamp mechanisms for both turntables, reducing the number of parts and reducing costs. Moreover, since both turntables are provided concentrically, setting the position of one turntable with respect to the carriage carrying the pickup means necessarily sets the position of the other turntable. Therefore, the position adjustment mechanism for setting the relative positions between the respective parts is simplified, and the cost can be further reduced.

Furthermore, since both turntables are provided concentrically in this way, the carry (1B2) for carrying an optical video disc and the carry (133) for carrying a compact disc are separate, as in conventional disc players. There is no need to provide a structure in which the compact disc holding carry (133) is moved relative to the other carry (132). This also makes it easier to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire compatible disc player according to the present invention, FIG. 2 is a plan view of a part of the internal structure of the disc player, and FIG. 3 is a sectional view taken along Figure 4 is a diagram showing a compact disc clamped, Figures 5 and 6 are a plan view and side view of the disc transport mechanism, and Figure 7 is a disc clamp. FIG. 8 and FIG. 9 are diagrams for explaining the mechanism, FIG. 8 and FIG. 9 are diagrams for explaining the means for controlling the rotation stop position of the second turntable, and FIG. 10 is a diagram for explaining the operation of the disc player. , FIGS. 11 to 14 are diagrams for explaining a conventional compatible disc player. Explanation of symbols of main parts 5...Disc support section 11...Variable rotation speed motor 11h...Spindle 12...First turntable 13... ... Compact disc 14 ... Second turntable 14h ... Notch 15 ... Optical video disc 16 ...
・Carriage 63...Press member

Claims (1)

[Claims] a rotational drive source including a spindle; a first turntable attached to the spindle; a carriage carrying a pickup means and moving along a plane including a disk carrying surface of the first turntable; The second turntable is fixed concentrically with the first turntable, and the second turntable is provided with a notch that reaches the circumference including the innermost position of the pickup means. Features: Compatible disc player.