JPS63206945A - Disk clamping device for disk player - Google Patents

Abstract

PURPOSE:To surely clamp a disk in a horizontal state with no eccentricity by providing the projections having outer diameters approximately equal to a disk clamping hole on a counter surface between a clamper and a spindle table. CONSTITUTION:Four projections 34a having their top parts formed in the taper shapes at 90 deg. intervals are provided on a counter surface to a clamper 52 of a spindle table 34. At the same time, the recess parts 34b are formed at the parts adjacent to the projections 34a. The outside distance of each opposite projection 34a is approximately equal to the diameter of a clamping hole D1 of a disk D and this disk D is positioned by the projections 34a of the table 34. Thus even if the disk D gets out of one of two opposite projections due to the external vibrations, the other opposite projection is put into the hole D1. As a result, the disk D is surely clamped in a horizontal state with no eccentricity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc player that plays back recording discs such as video discs and compact discs, and includes a spindle member such as a spindle motor that drives the disc;
The present invention relates to a disk clamping device that has an improved clamper that clamps and clamps a disk between the spindle members.

[Conventional technology and problems]

A conventional disk clamp device inserts a protrusion formed on a clamper or a spindle table into a clamping hole formed at the center of the disk, and presses and clamps the disk between the clamper and the spindle table. .

By the way, in the above-mentioned clamping device, since the protrusion that is inserted into the clamping hole of the disk is formed only on either the clamper or the spindle table, some kind of damage may occur while the disk is being transferred and clamped. If external vibrations are applied for some reason (such as when driving on a rough road when used in a vehicle), the disc may become displaced from the protrusion of the clamper or spindle table.
There have been problems such as not being able to clamp the disk in a horizontal state, or being clamped in an eccentric state, and, in the worst case, the disk coming off and falling off, causing damage to the disk.

[Purpose of the invention]

The present invention aims to solve the above-mentioned problems, and the clamper and the spindle table are provided with protrusions having approximately the same outer diameter as the clamping holes of the disk on their opposing surfaces, so that the disk can be moved from one side to the other due to external vibrations, etc. To provide a disk clamping device for a disk player, in which even if the protrusion comes off the protrusion, the other opposing protrusion is inserted into the clamping hole of the disk, so that the disk can be reliably clamped in a horizontal state without eccentricity. The purpose is to

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention forms protrusions with tapered tops on the opposing surfaces of the clamper and the spindle table, and adjusts the outer diameter of one of the protrusions to the clamping hole of the disk. The main idea is to position the disc by making the diameter approximately the same as that of the disc.

[Embodiment of the Invention] An embodiment of the present invention will be described with respect to a multi-disc player shown in FIG. 1 and the following drawings.

This multi-disc player, as shown in Fig. 3, is suitable for being carried in a car.A player body B is mounted in the trunk A1 of a car A, and a magazine C is inserted into the player body B. There is.

In this magazine C, a plurality of disc mounting plates C8 are rotatably supported on an axis CZ, and each disc mounting plate CI is loaded with one disc D, and the required disc mounting Board C
By rotating I around the axis C2, a desired disc D is placed in the player body B.

This player body B is connected by a cable E to a remote control device F installed on a dash board A2 of an automobile A.

The remote control device F selects a desired disc from among the plurality of discs D in the magazine C, transfers the disc D from the magazine C to the player body B, and plays it.

In the case C3 of this magazine C, a hole C3 is bored in one side near the axis C2, and from this hole C3, the disk mounting trFi on which the required disk D is mounted,
Press c+ to rotate it and push it out of the case C3 as shown in the same figure.

Further, the case C1 is provided with a recess C4 for locking the case C1.

Next, the configuration of the player body B will be explained.

■ is a frame that becomes box-shaped by attaching the upper plate 1a, and the left and right side walls have shafts t protruding toward the inner surface.
b, and a vertically elongated guide hole IC.

Horizontally long guide holes 2a of slide plates 2.3 are inserted into the shaft 1b on the left and right sides, respectively, and the slide plates 2.3 can slide back and forth along the side walls of the frame 1.

One slide plate 2 is formed with two stepped cam holes 2b, the other slide plate 3 is formed with one similar cam hole 2b, and the same number of disk mounting plates C of the magazine C are formed. A mark plate 4 is provided in which holes are formed in one horizontal row.

5 is a magazine holder that becomes box-shaped by attaching the upper plate 5a to the left and right side plates 5c and 5d attached to the lower plate 5b, and the upper vi5 has two holders on the side plate 5C side and two on the side plate 5d side. One pin 5e is installed in the horizontal direction.

These pins 5e pass through the cam holes 2b of the slide plates 2 and 3 and are inserted into the guide hole IC of the frame 1, so that the magazine holder 5 does not move in the front and back direction (and is supported at three points). It stays level.

A rack 2C is carved on the upper surface of the slide plates 2 and 3, and gears 5a and 5 are connected by a single shaft 6.
b are engaged with the racks 2C of the slide plates 2 and 3, respectively.

A motor 7 is attached to the upper plate 1a, and a plurality of reduction gear mechanisms 8 reduce the rotational speed and transmit it to the gear 6b. When the gears 5a and 5b rotate, the rank 2C meshing therewith moves back and forth. The slide plates 2 and 3 are driven, and the guide hole 2a is guided by the shaft 1b, and the slide plates 2 and 3 slide in the front and rear directions.

Further, a photo sensor P is mounted on the upper plate 1a with the mark plate 4 in between.
1 is installed.

The magazine holder 5 includes an upper plate 5a, a lower plate 5b, a side plate 5c,
A magazine C can be inserted into the upper plate 5d, and an arm 9 is pivotally supported on the upper plate 5a, and a spring 9a is mounted on the arm 9.

When the magazine C is inserted into the magazine holder 5, the tip of the magazine C hits the bent portion 9b of the arm 9 and rotates it.

On the upper plate 5a, when the arm 9 is rotated in this way,
A switch SW1 operated by arm 9 is attached.

Further, a rotary arm 10 is pivotally supported on the lower plate 5b, and its bent piece 10a is inserted through the elongated hole 5f of the lower plate 5b to open the lower Fi5b.
It protrudes from the top surface of the magazine C, and when the magazine C is inserted, the rotating arm 10 is pushed by this and rotates.

A spring 10b is mounted on the rotating arm 10 in a direction to push back the magazine C, and a resistance gear 11 is meshed with the gear 10c of the spring 10b. When the magazine C is pushed out from the magazine holder 5, the resistance gear 11 slows down the rotating arm 10 and weakens the ejection speed of the magazine C.

12 is a locking arm pivotally supported on the side t)i5c;
A spring 12a is mounted on this, and its engaging end 12b
is biased so as to protrude into the magazine holder 5.

The other end 12c of the locking arm 12 is in contact with the recess 2d of the slide plate 2, as shown in FIG. , the locking end 12b of the locking arm 12 is retracted from inside the magazine holder 5.

Reference numeral 13 denotes a second slide plate that slides back and forth along the side wall of the frame 1, with a horizontally long guide hole 13a being guided by a shaft provided on one side wall of the frame 1.

A rack 13b is carved on the side surface of the slide plate 13, and one end of a clamper press-down cam 14 pivotally supported on the lower surface of the frame 1 is pivotally attached to a connecting portion 13C, so that the slide plate 13 can slide. Then, the clamper pressing cam 14 rotates.

Furthermore, a motor 15 is attached to the lower surface of the upper plate 1a,
A worm 15a attached to the rotating shaft meshes with several stages of reduction gear mechanisms 16.

Reference numeral 17 denotes a push-out arm that is rotatably supported on the shaft of the upper plate 1a and rotates the disk mounting plate C5 of the magazine C. Coaxially with this push-out arm, an inner gear 18a and an outer gear 18b are mounted on a cylindrical annular surface. A shaft portion 18c of a double-sided gear 18 formed on both surfaces is rotatably supported.

A small gear 19 is rotatably fitted to this shaft portion 18c,
The small gear 19 and the inner teeth mesh with I 18 a, and
A planetary gear 20 is pivotally supported on the shaft portion 17a of the extrusion arm 17 and can be shifted around the small gear weight 9 as the extrusion arm 17 rotates.

Then, the pinion 19 meshes with the reduction gear mechanism 16, and the rotation of the motor 15 is transmitted thereto.
When the rotation of the planetary gear 20 is blocked, the planetary gear 20 becomes
When the pushing arm 17 is prevented from rotating, the double-sided gear 18 rotates.

The external gear 18b meshes with an intermediate gear 22 that meshes with a rack 21b of a third slide plate 21 in which a horizontally elongated guide hole 21a is inserted into the shaft of the upper plate 1a.

Further, an elongated guide hole 23a is inserted into the shaft of the upper plate 1a, and a projecting pin 21c of the slide plate 21 is slidably inserted into an L-shaped guide hole 23b of the regulating plate 23, which is slidable left and right. has been done.

Further, the push-out arm 17 includes a rotating arm 17b that pushes the disk mounting plate C out of the case C1, a push-back arm 17c that pushes the disk back into the case C3, and a position parallel to the axis of the push-back arm 17c. A protruding pin 17d is provided at , and this protruding pin 17d is inserted into a guide hole 23c of the regulating plate 23, which is perpendicular to the guide hole 23a.

Initially, the protruding pin 21c of the slide plate 21 is inserted into the guide hole 21.
It is located at the far end of the portion parallel to the guide hole 23a of b, and prevents the slide plate 21 from sliding. Therefore, the external gear 18b is prevented from rotating via the rack 21b and the intermediate gear 22.

At this time, when the motor 15 rotates, the planetary gear 20 rolls around the pinion 19 due to the rotation of the pinion 19, so that the push-out arm 17 is rotated by the shaft 17a.

Then, the protrusion pin 17d slides the guide hole 23C, and the regulating plate 23 is slid along the guide hole 23a.

Then, when the extrusion arm 17 rotates 90 degrees, the regulating plate 2
3, the L-shaped corner of the guide hole 23b reaches the position of the pin 21c, allowing the slide plate 21 to slide.

At the same time, the projecting pin 17d reaches the end of the guide hole 23c, and the rotation of the push-out arm 17 is blocked, making it impossible for the planetary gear 20 to shift, allowing the internal gear 18a to rotate, and the intermediate gear 22, rack 21b to slide the slide plate 21.

Reference numeral 25 denotes a carriage plate holder which is suspended by two hanging arms 24 so as to be able to move in an arc with respect to the upper plate 1a.
A fixing arm 26 is rotatably supported on the shaft 25b of a.

When the slide plate 21 slides on the side of the fixing arm 26 and the horizontal plate part 24a as described above, the tip 21
A tension spring 26a is mounted between the fixing arm 26 and the holder 25, and a tension spring 25c is also mounted between the holder 25 and the upper plate la.
is mounted.

Bins 25d are erected on the left and right sides of the holder 25, into which slide holes 27a of fixing plates 27.28 are slidably inserted, and these fixing plates 27.28 are attached to both ends of the fixing arm 26. connected.

Therefore, when the fixing arm 26 is pushed by the slide plate 21, the fixing plates 27 and 28 slide through the guide hole 27a.

On the left and right inner surfaces of the holder 25, one support arm 29 for supporting the disk D is rotatably supported on a shaft 25e, and is supported by a spring 29a wound around the shaft 25d. The tip 29b of the arm 29 is urged downward.

This support arm 29 is provided with a cam surface 29c, and the projecting piece 27b of the fixing plate 27, 28 comes into contact with this, so that when the fixing arm 26 is rotated as described above, the projecting piece 27b pushes the cam surface 29C to raise the tip 29b against the spring 29a.

Furthermore, one side of the fixing plate 27 and two horizontal V-shaped fixing grooves 27c are formed on the fixing plate 28.

Furthermore, mounting holes 2 are provided on both sides of the holder 25.
5f is drilled, and the support 31 of the damper 30 is attached to this.

The damper 30 is made of a viscoelastic material such as rubber, and exhibits a vibration absorbing effect. A protruding shaft 32a protruding left and right from the carriage plate 32 is inserted into its center hole 30a, and vibrations from the outside are absorbed into the holder. 25 to the carriage plate 32, so this is prevented.

In addition, from the carriage plate 32, there is one wire on one side and two wires on the other side.
A book fixing shaft 32b is provided to protrude, and this fixing shaft 32b passes through the hole 25g of the holder 25, projects outward, and is inserted into the V-shaped fixing groove 27c by sliding the fixing plate 27.28. In this case, the carriage plate 32 is fixed to the holder 25.

32c is a spring that suspends the carriage plate 32 from the holder 25, balances the weight of the carriage plate 32 and various parts attached to it, prevents the weight from being applied to the damper 30, and reduces the vibration absorption of the damper 30. Improving abilities.

A spindle motor 33 is attached to the carriage plate 32, and as shown in FIG. 18, a spindle table 34 is attached to this in advance. It can be attached by inserting the screw from the side and tightening the screw to the carriage plate 32 through the hole 34a of the spindle table 34.

By doing this, the spindle table 34 can be attached to the spindle motor 33 in advance.
The work is easy, the spindle table 34 can be prevented from tilting, and there is no need to use any mounting parts.

Two guide rails 35 for guiding the pickup member 36 are attached to the carriage plate 32.

As shown in FIG. 19, this pink-up member 36 has a pickup main body 37 that fits and slides on one guide rail 35, sandwiching the other guide rail 35 from above and below, and has a magnet 38 on its negative side. It is composed of a buried slide piece 39, a screw 40 screwed into the slide piece 39, and a connecting piece 42 through which the screw 40 is inserted and a spring 41 is mounted between the slide piece 39 and the slide piece 39.

One end of the connecting piece 42 is fixed to the big amplifier main body 37.

The magnet 38 attracts the guide rail 35 and the two pieces sandwiching it by its adsorption force to the guide rail 35.
The play in between is shifted to one side to prevent play in the pickup member 36.

The levelness of the pickup main body 37 is adjusted depending on the degree of tightening of the screw 40.

A sub-plate 44 is attached to the carriage plate 32, as shown in FIG. 20, to which a motor 43 for moving the pickup member 36 in the tracking direction is attached, and a protruding shaft 32a to one side of the holder 25 and two fixing shafts are attached to this sub-plate 44. A shaft 32b is attached.

The feed screw 46 is supported by shaft bearings 45a and 45b attached to this sub-plate 44, and the pulley 47 of the feed screw 46 is
A belt 48 is placed between the a1 motor 43 and the pulley 47b, and the rotation of the motor 43 is transmitted to the feed screw 46.

On the other hand, a rack 49 that engages with a feed screw 46 is attached to the pickup member 36, and the big amplifier member 36 is sent in the tracking direction as the motor 43 rotates.

In this way, by using the sub-plate 44, the number of holes drilled in the carriage plate 32 can be reduced, and the number of holes drilled in the carriage plate 32 can be reduced.
This increases the strength of the material and eliminates problems such as warpage.

A support piece 50 is attached to the carriage plate 32, and a fulcrum 51a of the clamper support plate 51 is pivotally supported on the support piece 50 by a shaft 50a.
The clamper support plate 51 and the support piece 50
A spring 51b is installed between the two.

53 is a leaf spring that is attached to the frame 1 and pushes the clamper 52 toward the spindle table 34; 54 is the upper plate 1;
This is a guide body that is attached to the case C1 of the magazine C and guides the disk mounting plate CI when it is pushed out from the case C1 of the magazine C.

A photocoupler Pt is attached to this guide body 54 in the direction in which the disk at plate C8 passes, and when the disk D passes over this, the reflected light causes the passage of the disk to be f+1.
! It is something to do.

[Operation of the embodiment]

The operation of this player body B will be explained next.

First, a disc D is placed on each disc mounting plate C1 of the magazine C, and then inserted through the magazine insertion slot B+ of the player main body B.

The magazine C inserted in this way enters the magazine holder 5, presses the bent part 9b of the arm 9 to rotate it, and when the magazine C is completely stored in the magazine holder 5, the switch SWl is closed. .

Then, the motor 7 rotates and the slide plates 2 and 3 are moved forward by the gears 5a and 5b.

As a result of this movement, the locking arm 12 moves from the other end 12C to the recess 2d, so the locking arm 12 rotates under pressure from the spring 12a, and its locking end 12b protrudes into the magazine holder 5, causing the magazine C into the recess C4 and fix the magazine C in that position. - At the same time, the bin 5e of the magazine holder 5 is pushed by the cam hole 2b of the slide plates 2 and 3 and reaches the end of the cam hole 2b, that is, the lowest position, so the magazine holder 5 remains horizontal. Descend to the lowest position.

In this lowering, the switch S W z is activated upon completion of the movement of the slide plate 3, and when it is detected that the lowermost position has been reached, the motor 7 is stopped and the magazine holder 5 is maintained at that position.

Next, when a command to play the desired disc D is received from the remote control device F, the motor 7 reads the mark plate 4 of the slide plate 3 with the photosensor P1 and moves the disc on which the desired disc D is mounted. The placing plate CI rises until it reaches the height of the rotating arm 17a of the extrusion arm 17, and in response to a command related to the photosensor P that detects this, the motor 7 is stopped and the motor 15 is rotated at the same time.

At this time, since the projecting pin 21C of the slide plate 21 is prevented from sliding by the guide hole 23b of the regulating plate 23, the double-sided gear 18 cannot rotate.

When the rotation of the motor 15 is transmitted to the small gear 19,
Since the double-sided gear 18 cannot rotate, the planetary gear 20 rolls around the small gear 19, so the push-out arm 17 rotates, and the rotating arm 17b is inserted into the hole C1 on the side surface of the magazine C.
Press the side of the disk mounting plate C from the

As a result, the disc mounting plate C1 on which the desired disc D is mounted slides on the guide plate 54 and
It rotates 0 degrees and is pushed out of the case C3.

At this time, photocoupler P2 connects disk D to this.
A check is made to see if disc D is loaded.
When no one is placed, the motor 15 is immediately rotated in the opposite direction, and the push-out arm 17 is rotated in the opposite direction.

Then, the push-back arm 17c pushes the disk mounting plate C1 to the opposite side and pushes it back into the case C2, and at the same time, this is displayed on the remote control device F to inform that the disk D is missing.

If the passage of the disk D is detected by the photocoupler P2, the rotation of the motor 15 continues and the disk mounting plate C
I is pushed out to 90 degrees by the rotating arm 17b.

In this way, when the extrusion arm 17 rotates 90 degrees, the protrusion pin 17d is prevented from rotating by the guide hole 23c, and while the extrusion arm 17 is rotating, the protrusion pin 17d prevents the regulation plate 3 from rotating.
2 moves in the direction of the guide hole 23a, and the protruding pin 21C is positioned at the corner of the guide hole 23b.

As a result, the internal gear 18a can rotate, and the rotation is transmitted to the rack 21b, and the slide plate 2
The tip of 1 is the horizontal plate part 25a of the holder 25 and the fixing arm 2
Hit the side of 6 and press it.

Therefore, the holder 25 is at the point where the arm 24 is rotated and the holder 25 is stopped, and the arm 24 is unable to swing the holder 25.

Also, the fixing arm 26 is held at the tip 21e against the spring 26a.
When pushed and rotated, the fixing plates 27 and 28 move, and their 7-shaped fixing groove 27c separates from the protruding shaft 32b, making it free, so the carriage plate 32 is supported by the spring 32c and the damper 30. The damper 30 absorbs external vibrations.

The completion of the above operation by the slide plate 21 is completed by the switch S operated by the protrusion 21d of the slide plate 21.
Detected by W3.

On the other hand, the rack 13b of the second slide plate 13 is also meshed with the external gear 18b, and when the external gear 18b cannot rotate, the push-down cam 14a of the clamper push-down cam 14 connected to the slide plate 13 It contacts the clamper support plate 51 and pushes it down against the spring 51b.

Therefore, the clamper 52 is separated from the spindle table 34.

However, when the external gear 38 rotates, the slide plate 13 also slides, rotating the clamper push-down cam 14, so that the lower part of the push-down cam 14a contacts the clamper support plate 51.
The clamper 52 moves toward the spindle table 34 by the biasing force of the spring 51b.

At this time, the temporary spring 53 helps the clamper 52 approach the spindle table 34 horizontally.

Before the fixed plates 27 and 28 move, the fixed plates 2
7 and 28, the support arm 29 has its tip 29b lowered, and its tip 29b is in contact with the upper surface of the disk D fed in by the rotation of the disk mounting plate C3.

However, as described above, at the same time as the clamper 52 rises, the tip 29b of the support arm 29 also retreats upward due to the sliding of the fixed plates 27 and 28, so the disk D is pushed up by the clamper 52 and set on the spindle table 34. be done.

When the completion of this operation is detected by the switch SW as described above, the spindle motor 33 rotates to drive the disk D, and the motor 43 drives the feed screw 4.
6 and attach the big amplifier member 36 to the guide rail 3.
5 in the tracking direction, and the disc D is played back.

When the playback of the disc D is finished, or when a command is issued from the remote control device F to stop the playback or to return the disc D to the magazine C, the operation opposite to the above is performed, and the disc D is placed on the disc mounting plate CI! After being placed, the disk mounting plate C1 is returned into the case C5.

Then, the magazine C descends again to the lowest position and waits.

Next, when there is an eject command for magazine C, motor 7
By the reverse rotation of , the slide plates 2 and 3 slide in the opposite direction, raising the magazine holder 5 to the highest position, and at the same time, the other end of the locking arm 12 comes into contact with the text other than the recess 2d,
The locking end 12b is held against the spring 12a by the magazine holder 5.
pull it outward from the

As a result, magazine C is unlocked, so
The magazine C is pushed by the bending part 10a of the rotating arm IO,
It is ejected from the player body B.

The carriage plate 32 is provided with an opening 32d at least within the movement range of the big amplifier body 37 so that the pink-up body 37 can read the signal from the disk D set on the spindle table 34.

Therefore, in order to prevent oil applied to various parts of the carriage plate 32 or other parts from flying off and adhering to the pickup body 37, a partition wall 61a is provided to support the wiring to the spindle motor 33 and the pickup member 36. A cover plate 61 is attached to the carriage plate 32. This cover plate 61 also serves to increase the strength of the carriage plate 320.

[Configuration and operation of clamp device]

In the above-mentioned embodiment, details of the clamp device for rotationally driving the disk will be explained with reference to FIGS. 21 to 23.

The disk clamping device is composed of a spindle table 34 and a clamper 52. spindle table 34
is fixed to the rotating shaft of the spindle motor 33, and the clamper 5'2 is rotatably attached to the clamper support plate 51, which is the same as in the conventional case. The point is that improvements have been made to the facing surfaces of each.

That is, in the present invention, on the surface of the spindle table 34 facing the clamper 52, four projections 34a having tapered tops are formed at 90 degree intervals as shown in FIG. A recess 34b into which a protrusion 52c of a clamper 52 (to be described later) is inserted is formed in a portion adjacent to the protrusion 34a.A distance α between the outer portions of the protrusion 34a facing each other is determined by the distance α between the clamps formed on the disk D. It is formed to have approximately the same length as the diameter β of the hole D1, and the disk D is positioned by the protrusion 34a of the spindle table 34.

On the other hand, the clamper 52 is attached to a ring-shaped leaf spring 52b that is pivotally supported with a certain margin to a mounting member 52a fixed to the clamper support plate 51, and has a tapered top on the surface facing the spindle table 34. Four shaped projections 52C are formed at 90 degree intervals, and a recess 52d into which the projection 34a of the spindle table 34 is inserted is formed.

Note that the diameter γ of the outer portion of the opposing protrusion 5.2c
is the clamping hole of disk D, which is formed smaller.

Then, as shown by the solid line in FIG. 22, the clamper support plate 5
1 is rotated counterclockwise and the protrusion 52c of the club member 52
is inserted into the clamping hole D1 of the disk D, and in a state where the disk D is lifted above the disk mounting plate c1,
The gap g formed between the tip of the protrusion 34a of the spindle table 34 and the protrusion 52c of the clamper 52 is the disk D.
The thickness of the protrusions 34a, 52 is smaller than the thickness of
Determine the height of c.

When the disk mounting plate CI is pulled out from the magazine C and the disk D is clamped, the clamper support plate 51 is rotated from the imaginary line in FIG. 22 as shown by the solid line, and the projection 52C of the clamper 52 is rotated. While being inserted into the clamping hole of the disk D, the clamper 52 changes from an inclined state to a horizontal state to lift the disk D above the disk mounting plate C2. In this state, the gap g between the respective protrusions 34a and 52c is smaller than the thickness of the disk D, so even if the disk D is lifted up from the disk mounting plate C8 and is unstable, the clamping hole of the disk D will not close to the protrusion 34a. , 52c, and therefore clamping can be performed reliably.

Then, when the clamper support plate 51 further rotates, the second
As shown in FIG.
are respectively inserted into the recesses 34b, and the clamper 52 is pressed against the spindle table 34 with the disk D sandwiched therebetween.

At this time, even if the protrusion 34a of the spindle table 34 and the protrusion 52c of the clamper 52 come into contact with each other, each protrusion 34a,
Since the tip of the clamper 52c has an acute angle, the clamper 52 is rotatable, so it rotates a little and the protrusions 34a, 5
2c are shifted from each other, and the protrusions 34a and 52c are in the recess 34.
b, 52d to clamp the disc.

Note that in the clamped state, the disk D is supported by the protrusion 34a of the spindle table 34, so even if there is a misalignment due to a dimensional error between the clamper 52 and the spindle table 34, the disk D will not move. Since the disk D is supported and rotated by the spindle table 34 on the drive side, the disk D does not rotate eccentrically and tracking becomes difficult.

Further, in the above-described embodiment, the gap g between the protrusion 34a of the spindle table 34 and the protrusion 52c of the clamper 52 was made smaller than the thickness of the disk D. Alternatively, even if the size is slightly larger, even if external vibration occurs during clamping of the disk D and the disk D shifts or comes off from one protrusion (52c in the example), the opposite protrusion (52c in the example) ) is inserted into the clamping hole of the disk D, so the disk D can be clamped horizontally and without eccentricity.

〔Effect of the invention〕

In the present invention, projections are formed like ridges on the opposing surfaces of the clamper and the spindle table, and the top of each projection is tapered, so that when external vibrations are applied for some reason, the disk can be moved from one projection to the other. Even if the disc shifts or comes off, the other opposing protrusion is inserted into the clamping hole of the disc, so the disc can be clamped horizontally and without eccentricity. This has the effect of not only making it possible to perform accurate tracking, but also solving problems such as difficulty in tracking.

[Brief explanation of the drawing]

Figures 1 to 23 show one embodiment of the present invention, Figures 1 and 2 are perspective views in an exploded state, Figure 3 is an overall perspective view when mounted on a vehicle, and Figure 4. is a plan view, Fig. 5 is a plan view with most of the upper plate cut away, Fig. 6 is a plan view showing the magazine holder and carriage plate, Fig. 7 is a plan view of the clamper pressing mechanism and carriage plate holder locking mechanism, Figure 8 is a plan view of the arm for pushing out the disc in Figure 7 when it has rotated to the extrusion state, Figure 9 is a plan view of the carriage plate holder in the locked state of Figure 7, and Figure 10 is the magazine and spindle. A plan view showing the relationship between the tables, FIG. 11 is a plan view of the disk mounting plate in FIG. 10 rotated to the play position, FIG. 12 is a plan view of the carriage plate holder, and FIG. 13 is an example of the frame. Fig. 14 is a side view showing the main parts when the magazine holder is at its lowest position, Fig. 15 is a side view showing the position of the magazine holder and the relationship of the disk to the spindle table, Fig. 16 is a side view of the carriage plate holder, FIG. 17 is a side view of the disk guide plate and photosensor, FIG. 18 is an oblique view showing the mounting means for the spindle table, and FIG. 19 is a front view showing the state in which the pickup member is supported. Fig. 20 is a plan view of the feed screw portion, Fig. 21 is a plan view of the facing surface between the spindle table and the clamper, Fig. 22 is a sectional view taken along the I-r line of the same as above showing the disk before clamping, Fig. 23 is the same sectional view as the above, showing a state in which the disk is clamped. B...Player body, C...Magazine, C3...
Disc mounting plate, C! ...Shaft, C3...Case, C
4... hollow, l... frame, 1b... shaft, IC
...Guide hole, 2.3...Slide plate, 2a...
Guide hole, 2b...cam hole, 2C...rack, 2d
... recess, 4 ... mark plate, 5 ... magazine holder, 5e ... pin, 6 ... shaft, 6at6b ... gear, 7 ... motor, 8 ... reduction gear mechanism ,9...
Arm, 9a... Spring, 9b... Bent part, 10...
・Rotating arm, 10a...Bending part, 10b...Spring, 10C...Gear part, 11...Resistance gear, 12...
- Locking arm, 12a... Spring, 12b... Locking end, 12c... Other end, 13... Slide plate, 13a
...Guide hole, 13b...Rack, 13C...Connection part, 14...Clamper push-down cam, 15...Motor, 15a...Worm, 16...Reduction gear mechanism,
17... Push-out arm, 17a... Shaft, 17b...
・Rotating arm, 17c... Push back arm, 17d...
- Projection pin, 18...Double-sided gear, 18a...Internal gear, 18b...External gear, 18c...Shaft portion, 19...
- Small gear, 20... Planetary gear, 21... Slide plate, 21a... Guide hole, 21b... Rack, 21c
...Protrusion pin, 21d...Protrusion piece, 21e...Tip,
22... Intermediate gear, 23-... Regulating plate, 23 a,
23 b, 23 c...-guide hole, 24...
- Hanging arm, 25... Carriage plate holder, 25
a...Horizontal plate part, 25b...Shaft, 25c...Spring,
25d, 25e...shaft, 26...fixing arm, 2
6a...Spring, 27.28...Fixing plate, 27a...
・Guide hole, 27b...projection piece, 27c...fixing groove,
29...Support arm, 29a...Spring, 30...
Damper, 30a... Center hole, 31... Damper support, 32... Carriage plate, 32a... Protruding shaft, 32b
... Fixing shaft, 32C... Spring, 32d... Opening, 33... Spindle motor, 34... Spindle table, 34a... Hole, 35... Guide rail,
36...Pickup member, 37...Pink up, 38...Magnet, 39...Slide piece, 40
... Screw, 41 ... Spring, 42 ... Connection piece, 43
...Motor, 44...Sub board, 45a, 45b...
・Shaft bearing body, 46...Feed screw, 47a, 47b...
・Pulley, 48...Belt, 49...Rank, 50
...Support piece, 50a...Shaft, 51...Clamper support plate, 51a...Fully point, 51b...Spring, 52...
・Clamper, 53,...plate spring, 54...guide body, sw,, sw! , sW3, SWa... switch, P,... photo sensor, P... photo coupler, 34a... protrusion, 34b... recess, 52c...
Projection, 52d... recess. Figure 17 32c Figure 18

Claims (1)

[Claims] In a disk clamping device for a disk player that clamps a disk between a clamper and a spindle table, a top portion is tapered at a position having an outer diameter approximately the same as the clamping hole of the disk, on each opposing surface of the clamper and spindle table. 1. A disc clamping device for a disc player, comprising a projection having a shape and a recess into which the projection is inserted.