JPH0343707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk elevating device for automatically mounting a disk on a turntable in a disk reproducing apparatus for reproducing signals recorded on a disk.

Automating the loading of discs in a disc playback device not only improves the operability of the device, but also ensures that the discs are always loaded in a prescribed procedure, which protects the disks and equipment and also helps to prevent discs from being placed in a specified manner. It has the advantage that it can always be attached accurately to the desired location. From this point of view, in digital audio disk playback devices, which have been making remarkable progress in recent years, automation of disk loading is being carried out in line with the ability to obtain high electrical performance.

Conventionally, this type of disc playback device has generally been configured as follows. first,
A tray having a disk mounting section is disposed inside the main body of the device. This tray automatically moves between the open position, where the disk rest is outside the device, and the closed position, where the disk rest is located inside the device, where the signal detection section is installed. It is now possible to move. Additionally, a clamper is generally provided within the main body of the device, which chucks the disk placed on the disk placement portion onto the turntable when the tray is placed in the closed position.

To play a disc using the above device,
First, the operation button for opening the tray is operated to bring the tray to the open position, and in this state, the disk is placed on the disk placement section. Next, the operation button for closing the tray is operated to bring the tray to the closed position, and to bring the disk to the position of the signal detection section. At this time, the clamper is operated to check the disc on the turntable. Here, the disc is rotated by operating the play operation button, and the signal from the disc is reproduced by the signal detection section.

By the way, among the above-mentioned disc playback devices, there are two types: one in which the turntable and its drive source are provided in the tray, and the other in which the turntable and its drive source are provided in the main body of the device.

As an example of the former, as shown in FIGS. 1 and 2, for example, a turntable 3 is placed on the top surface of a tray 2 that is arranged so that it can be pulled out and stored in the device main body 1, and It is common to have a structure in which a motor 4 serving as a drive source for the turntable 3 is disposed inside.

However, the above disc playback device has the disadvantage that the tray 2 becomes large because the motor 4 is built into the tray 2, and the weight of the tray 2 portion becomes large, making it difficult to drive the tray 2. There is a drawback that a large-capacity driving source is required.

As an example of the latter, for example, as shown in FIG. 3, a turntable 20 and its drive source (not shown) are provided in the main body of the device, and the turntable 20 is moved by a belt 21 linked to the drive source. When the tray 22 is moved to the closed position, the tray 22 and the disk 23 placed thereon are positioned above the turntable 20. A device has been proposed in which the turntable 20 is raised by a cam 24 driven by the motor 15 to chuck the disc 23.

Since the above-mentioned apparatus does not have a drive source built into the tray, the above-mentioned drawbacks can be eliminated. However, in this device, the power transmission system of the turntable 20 is connected to the turntable 20.
The structure must be constructed so that driving force can be transmitted even when the 0 moves up and down, which has the disadvantage of complicating the structure of the drive system.

Therefore, as a device in which the disk is attached to the turntable using a completely different means from the above-mentioned devices and placed near the signal detection section, the turntable and its drive source are placed at a fixed position within the main body of the device. It is conceivable to raise the disk when moving the disk placed on the tray together with the tray, and to lower the disk and attach it to the turntable when the tray is placed in the closed position within the device body. With such a device, all of the above-mentioned drawbacks can be eliminated.

This invention has been made in view of the above circumstances, and is capable of lifting and lowering a disk in a disk playback device that can reduce the size and weight of the tray portion for transferring the disk, and simplify the configuration of the tray drive system. The device is provided with a lifter that moves from and out of the bottom of the disk placement section of the tray to raise and lower the disk placed on the disk placement section, and this lifter is used to chuck the disk onto the turntable. It is designed to move up and down in conjunction with a clamper.

Embodiments of the present invention will be described below with reference to the drawings.

The drawings show one embodiment of the invention,
Reference numeral 31 in Figures 4 to 6 and Figure 22.
32 is a chassis fixed within the device body 31, 33 is a tray supported on the chassis 32, and 34 is a clamper.

The chassis 32 is a rectangular plate,
It is arranged horizontally with its front edge close to an opening 36 formed in a front panel 35 of the main body 31 of the device. A disk drive motor 37 is fixed to the lower surface of this chassis 32. As shown in FIGS. 6, 7, and 12, the motor 37 is fixed to the chassis 32 with its rotating shaft 38 protruding toward the upper surface of the chassis 32.
A turntable 39 is fixed to the rotating shaft 38. The tray 33 holds the disk 40 in the device main body 3.
1, and is supported so as to be movable between the closed position shown by the solid line in the figure and the open position where it is pulled out from the opening 36 to the outside of the device main body 31. There is. This tray 3
3, when transferring the disk 40, the disk is raised and the disk 40 is placed on the turntable 39.
Lifters 41, 41 are attached to lower the disc onto the turntable 39 when it is located above. The clamper 34 chucks the disk 40 placed on the tray 33 onto the turntable 39 when the tray 33 is in the closed position.

The details and arrangement of the tray 33 are shown in FIG.
It is shown in FIGS. 5, 8 to 16, and 22. As shown in these figures, the tray 33 is a rectangular plate-shaped body with a constant thickness and a notch 45 formed at the rear. This tray 33 has a disk mounting portion 46 formed on the upper surface side of its front half, which is a recessed portion having a circular shape in plan view, and notches 47, 47 are formed on both left and right sides of the disk mounting portion 46. ing. In addition, the left and right side wall portions 48, 48
Rail portions 49, 49 projecting outward are formed at the lower end portions, respectively. Furthermore, a rack gear 50 is formed on the outer surface of the right side wall portion 48 from the vicinity of the notch portion 47 to the rear side. Further, on the right side wall portion 48, a protruding portion 51 is formed adjacent to the front of the distal end tooth of the rack gear 50 and protrudes laterally from the tip of the tooth of the rack gear 50. Note that this protrusion 51 will be explained in detail later. Furthermore,
A notch 53 is formed in the bottom wall 52 of the disk mounting portion 46 from the center toward the rear.
This notch 53 penetrates the peripheral wall 54 of the disk mounting portion 46 and opens into the notch 45 . Further, a lifter 4 is provided on the bottom wall portion 52 and the peripheral wall portion 54.
Hole 5 for arranging claws 1 and 41 (lifter claws)
5, 55... are formed.

A decorative plate 57 is fixed to the front surface of the tray 33 formed as described above, and lifters 41, 41 are attached to the back surface thereof. Lifter 4
1 is a lifter main body 58 as shown in FIG.
and claws (lifter claws) 59, 59, which are connected to the front and rear ends of the lifter body so as to protrude laterally. The lifter body 58 has claws 59,
A front wall part 61 and a rear wall part 62 are successively provided at the front and rear ends of a long main wall part 60 on which the main wall part 59 is successively provided, and these wall parts 6
Engagement protrusions 6 are located on the axis passing through the sides of the claws 59 and 59 to form shafts (lifter rotation fulcrums) 63 and 64, and further protrude rearward on the rear wall portion 62.
5 and a pressed projection 66 that projects upward. In the above, the shafts (lifter rotation fulcrums) 63, 64 are shown in FIG. 14 or 23.
As shown in the figure, the claws 59, 59 are provided on the opposite side of the pressed projection 66. Here, the lifters 41 are disposed on the left and right sides of the tray 33, and the structures on the left and right sides are symmetrical.

To explain the installation state of the lifter 41 disposed on the right side of the tray 33, as shown in FIG.
5, 55, and the shafts 63, 64 are placed in the tray 3.
Groove 6 of support walls 67, 67 formed on the back surface of 3
8, 68 so as to extend in the front-rear direction. The shaft 64 is connected to the tray 33 as shown in FIGS. 14 and 16.
An annular plate 72 is fixed to a post 69 formed on the back side of the frame with a washer 70 and a screw 71. The shaft 63 is also locked in the groove 68 by the same means as described above. The lifter 41 attached to the tray 33 in this way
It is rotatable around holes 55, 64, and
The upper surface of the claws 59, 59 located in the disk mounting section 46 is located inside the disk mounting section 46, and the top surface of the claws 59, 59 located in the disk mounting section 46 is
It is designed to be able to move up and down by going in and out. In this case, when the claw 59 of the lifter 41 is rotated in the direction of raising it, the pressed protrusion (pressed portion) 66 is moved against the upper wall portion 7 of the tray 33, as shown in FIG.
3 into a hole 74 formed in the hole 74. This pressed projection 66 is provided at a position corresponding to the clamper 34, which will be described in detail later, and more specifically, at a position facing a pressing piece 105 (see FIG. 5) formed on the clamper 34. The rotation range of the lifter 41 ranges from a position where the side end of the main wall 60 contacts a wall 76 formed on the tray 33 to a position where the side end of the rear wall 62 contacts the upper wall 73 of the tray 33. limited in scope. The lifter 41 is urged by a leaf spring 77 in the direction in which the claw 59 moves upward. That is, the first
As shown in FIG. 0 and FIG.
One end of 7 is engaged with a rib 78 formed on the tray 33, and the other end is engaged with an engagement protrusion 65 of the lifter 41. Under this configuration,
The claw 59 of the lifter 41 is always urged to the upper limit position. The above is an explanation of the attachment state of the lifter 41 disposed on the right side of the tray 33, but the lifter 41 disposed on the left side is also attached to the tray 33 with the same structure as above, and the leaf spring 7
7.

The tray 33 to which the lifters 41, 41 are attached as described above is placed on the chassis 32 and is movable in the front and back direction (in the directions of arrows A and B in FIG. 4). To explain the support structure of the tray 33, as shown in FIG. 4, FIG. 8, and FIG. Two holes 80 are formed in each case, and a roller support member 81 is provided by outsert molding in the portion where these holes 80 are formed. A roller 83 is rotatably supported by each roller support member 81 via a shaft 82, respectively. The tray 33 has left and right side walls 48,
The lower surface of the rail portion 49 at the bottom of the roller 83
83... is placed on the same roller so as to be in contact with it. Further, on the left and right sides of the chassis 32, a fourth
As shown in FIG. 8 and FIG.
4 are formed, and guide columns 8 are formed in the portions where these holes 84 are formed by outsert molding.
5 is provided. Two guide columns 85, 8
5 is located on the outside of the rail parts 49, 49 so as to restrict the lateral movement of the tray 33. A washer 86 is attached to the screw 8 at the upper end of each guide post 85.
It is fixed by 7. The washer 86 has its peripheral edge located above the tray portion 49 in order to restrict upward movement of the tray 33. Based on this configuration, the tray 33 can move smoothly in the front and rear directions while rolling into contact with the rollers 83, 83, and is placed in the closed position shown in the figure (stored in the device main body 31 and placed in the disk mounting section 46). The disk mounting section 46 can be moved between the position where the center of the turntable 39 coincides with the center of the turntable 39 and the open position (a position where the disk mounting section 46 is exposed to the outside of the device main body 31 when pulled out forward). . In this case, the turntable section 39 protrudes upward from the bottom wall section 52 of the tray 33 as shown in FIG.
3 so that it does not come into contact with the moving tray 33. In addition, when the disk 40 is placed on the disk placement portion 46 of the moving tray 33, the disk 40 is placed in the 11th position.
As shown by the two-dot chain line in the figure, the disc 40 is raised by the lifter 41, and the disc 40 in this case does not come into contact with the turntable 39.

The details and arrangement of the clamper 34 are shown in FIGS. 4 to 7 and 10. As shown in these figures, the main body 90 of the clamper 34 is formed into a plate shape, and has a hole 91 at its tip.
is formed. A chuck plate 92 for chucking the disc 40 to the turntable 39 is inserted into the hole 91. The chuck plate 92 is formed into a disk shape, and a steel ball 93 is integrally fitted into a hole formed in the center of the chuck plate 92. This chuck plate 92 is prevented from falling downward by having an engaging portion 94 formed on its peripheral portion engaging with an engaging portion 95 formed on the main body 90. A cover plate 96 is attached to the upper surface of the main body 90 by screws 97, 97 so as to cover approximately half of the hole 91. With this configuration, the chuck plate 92 cannot escape even upwardly. On the other hand, projecting wall portions 98 are formed at two locations on the left and right on the lower surface of the rear end of the main body 90, and a shaft 99 that projects laterally is formed in the projecting wall portion 98. The shaft 99 is supported by a support member 100 formed on the chassis 32 by outsert molding, and is rotatably supported with a support structure similar to that of the shafts 63 and 64 of the lifter claw 41 described above.
With this configuration, the clamper 34 is rotatable in the directions of arrows C and D shown in FIGS. 5 and 6. In this case, when the clamper 34 is rotated in the direction of arrow C, the center of the chuck plate 92 is aligned with the turntable 3.
It is designed to rotate towards the center of 9. Further, the main body 90 has a cam follower 102 formed on the right side of the distal end thereof and projecting laterally.
A convex portion 103 is formed at a position a predetermined distance forward from 9 and protrudes downward and extends in the left-right direction. The tip of the cam follower 102 protrudes laterally from the outer surface of the side wall 48 of the tray 33, and its vertical position is controlled by a cam body to be described later. The convex portion 103 allows the tray 33 to be placed in the closed position.
It engages with a recess 104 formed in the upper wall portion 73 of the tray 33 to lock the tray 33 in that position. Furthermore, on the bottom surface of the main body 90, FIG.
As shown in FIG. 0, a pressing piece 105 is formed. This pressing piece 105 pushes the pressed projection 66 of the lifter 41 downward to place the claw 59 of the lifter 41 at the lower limit position shown by the solid line in FIG. 11 when the tray 33 is in the closed position. As shown in FIG. 6, the clamper 34 has a coil spring ( It is biased in the direction of arrow C by a biasing device 108.

The tray 33 and clamper 34 described above are driven by a drive mechanism 110 provided on the chassis 32. Details of the drive mechanism 110 are shown in FIGS. 4 and 17 to 20. As shown in the figure, the chassis 32 includes a tray
A motor 111 (drive source) for driving the clamper is attached, and a shaft 11 is mounted so as to protrude further upward.
2 to 114 are fixed. A shaft 114 is located on the side of the cam follower 102, and a cam body 115 is mounted on this shaft 114. The rotational force of the motor 111 is applied to a pinion gear 1 fixed to a motor shaft 116 projecting upward from the chassis 32.
The signal is transmitted from 17 to the cam body 115 via drive gears 118 and 119 which are made up of large and small gears mounted on shafts 112 and 113. As shown in FIGS. 18 and 19, the cam body 115 is attached to a disk-shaped main wall 120 with a mounting wall 1 at its center.
21, and an annular wall portion 122, 1 is formed on the lower surface thereof.
23 and a stopper 124, and a cam portion 125 is formed on the periphery of the upper surface thereof. At this time, the outer peripheral surface of the wall portion 122 is a gear 126, and this gear 126 meshes with a small gear of the drive gear 119 so that rotational force is transmitted. Further, a gear 128 (pinion gear) is formed on the outer peripheral surface of the wall portion 123 in a range indicated by the reference numeral 127. A portion 129 of this wall portion 123 where the gear 128 is not formed (hereinafter, this portion will be referred to as a cutout portion)
is formed to have a rough surface so that the protrusion 51 of the tray 33 abuts with a constant frictional force as described below. Here, the protrusion 51 of the tray 33,
To explain the positional relationship between the rack gear 50, the gear 128 of the cam body 115, and the notch ₁₂₉ , as shown in FIGS. When the tray 33 is in the closed position shown in the figure, the protrusion 51 abuts against the notch 129 with a constant frictional force. and cam body 1
When gear 15 rotates in the direction of arrow E, gear 128
When the rack gear 50 reaches the rack gear 50, these mesh with each other, and as the cam body 115 rotates, the tray 33 is pulled out forward.

The cam portion 125 is an annular wall portion having different heights, and controls the height of the tip of the clamper 34 by driving the cam follower 102.
The height of the cam portion 125 will be explained with reference to FIGS. 18 and 19. The area indicated by the reference numeral 131 is a flat portion having the same height as the upper surface of the main wall portion 120, and the area 132 adjacent to this is a flat portion having the same height as the upper surface of the main wall portion 120. is a slope portion that gradually becomes higher in the direction of arrow G, and a region 133 that is continuous with this slope portion is a flat portion that is higher than the flat portion 131 by a dimension l ₂ . Here, the cam follower 102 is pressed against the cam portion 125 from above by the clamper 34 being urged by the coil spring 108 . Therefore,
When the cam body 115 rotates, the cam portion 125
As a result, the cam follower 102 moves up and down, and the front end of the clamper 34 moves up and down. Here, when the cam follower 102 comes into contact with the flat part 131 of the cam part 125, the chuck plate 92 of the clamper 34 is placed in a position where it chucks the disk 40 against the turntable 39, as shown by the solid line in FIG. When abutting against the portion 133, the tip of the clamper 34 is placed at the upper limit position shown by the two-dot chain line. The shape of the cam portion 125 and the gear 12 described above
8. The formation position of the notch 129 is determined so that the tray 33 and the clamper 34 are driven at a constant timing. What is particularly taken into consideration at this time is that the notch 129 is at least the inclined part 13.
2 is formed so as to cover the area in which it is formed. This allows the protrusion 51 to come into contact with the notch 129 when the tip of the clamper 34 moves up and down.

Further, pins 135 and 136 are formed on the lower surface of the wall portion 124 of the cam body 115, and these pins 135 and 136 are used to activate a limit switch mounted on the chassis 32 when the cam body 115 is rotated. 137 and comes into contact with actuator 138 . Limit switch 137
constitutes part of a control circuit that controls the drive of the motor 111, and generates a trigger signal for stopping the motor 111. The above control circuit is controlled by arrows E and F on the cam body 115.
The movement of the pins 135 and 136 with the rotation in the direction causes the actuator 138 to close to the contact point 139 or 1.
40, the motor 111 is controlled so that the cam body 115 is reversely rotated to bring the actuator 138 to the center position, and then the rotation of the cam body 115 is stopped. This control circuit is
A control circuit for controlling the disk drive motor 37 is provided on a printed circuit board 141 disposed on the lower surface of the motors 37 and 111. The rotation range of the cam body 115 is mechanically limited by the stopper 124 of the cam body 115 coming into contact with a stop pin 142 fixed to the chassis 32.

In the above configuration, the control circuit that controls the motors 37 and 111 is activated by operating various buttons (not shown) such as a tray open button, a tray close button, a play button, and a stop button. ing.

Next, the operation of the disc playback device configured as described above will be explained.

Figures 4 to 13, Figure 17, Figure 19,
The positions of the various parts indicated by solid lines in FIG. 20 show a state in which the tray 33 is housed in the device main body 31, that is, a state in which the tray 33 is in the closed position. In this state, the center of the disk mounting portion 46 of the tray 33 is positioned to coincide with the center of the turntable 39. And clamper 34
, the cam follower 102 is in a state where its tip is lowered by contacting the flat portion 131 of the cam portion 125, the chuck plate 92 is contacting the turntable 39, and the pressing piece 105 is pressed by the lifter 41. The protrusion 66 is pushed down, and the convex portion 103 is in a state engaged with the concave portion 104 of the tray 33.
Here, the disk 4 has already been placed in the disk mounting section 46.
0 is inserted, the chuck plate 92 chucks the disc 40 onto the turntable 39. Also, at this time, the lifter 41 is moved by the claw 5 due to the pressed projection 66 being pushed down.
9 is placed at the lower limit position below the disk 40. Furthermore, the tray 33 is locked in that position by the projection 103 engaging with the recess 104. Furthermore, the actuator 138 of the limit switch 137 is located at the center between the contacts 139 and 140, as shown by the solid line in FIG. 21a.

If you want to install a new disk from outside the device main body 31 and play it, first,
Press the tray release button to start the motor 111. Motor 111 rotates cam body 115 in the direction of arrow E via pinion gear 117 and drive gears 118 and 119. When the cam body 115 rotates in the same direction, the cam follower 102, which had been in contact with the flat part 131, rides on the inclined part 132 as shown in FIG. 21b, and the inclined part 132 raises the cam follower 102. Note that at this time, the notch 129 comes into sliding contact with the protrusion 51 of the tray 33 with a constant frictional force. The cam portion 125 of the cam body 115 connects the cam follower 102 to the flat portion 13.
Let it reach 3. In this way, the cam follower 10
2 is raised, the clamper 34 rotates in the direction of arrow D and the disc 40 is moved by the chuck plate 92.
The chuck is released, the pressing piece 105 rises, and the engagement between the convex portion 103 and the concave portion 104 is released. As the pressing piece 105 rises, the lifter 41 rotates around the shafts 63 and 64 due to the force of the leaf spring 77, and the pawl 59 rises, causing the disc 40 to move as shown by the two-dot chain line in FIG. Raise as shown.

When the disk 40 is raised to the upper limit position as described above, the gear 128 of the cam body 115 meshes with the rack gear 50 of the tray 33 at this point. Here, the tray 33 is the gear 12 of the cam body 115.
8 moves forward as the rack gear 50 is pushed forward, and finally the disk mounting portion 4
6 is moved to a position where it is exposed to the outside of the device main body 31. When moving this tray 33, the disk 4
0 is supported at the upper limit position by the claw 59 of the lifter 41 and is moved without contacting the turntable 39. When the tray 33 moves to the above position, the pin 135 of the cam body 115 comes into contact with the actuator 138 of the limit switch 137, and this pin 135 connects the actuator 138 to the contact point 139 as shown by the two-dot chain line in FIG.
bring it into contact with. Actuator 138 is contact point 13
9, these actuators 138,
The control circuit, which includes contact 139 as part of its circuit, reverses motor 111, rotates cam body 115 slightly in the direction of arrow F, returns actuator 138 to the neutral position, and then stops motor 111 and rotates cam body 115. stop the movement of In addition, in this case, when the tray 33 is pulled out the most forward,
The stopper 124 of the cam body 115 is the stop pin 1
42 and mechanically prevents excessive rotation of the cam body 115.

Thus, after the tray 33 is pulled out forward as described above, the disk in the tray placement section 46 is replaced with a new disk. Then, push the tray closing button to move the tray 33 to the closing position in the reverse order of the above. Immediately after the tray 33 reaches the closed position, the center of the tray placement portion 40 coincides with the center of the turntable 39, and the tray placement portion 4
The center of the disk 40 that is being raised by the lifter 41 in the center of the turntable 39 also coincides with the center of the turntable 39. From this point on, the cam follower 102 of the clamper 34 moves to the inclined portion 132 of the cam portion 125 and begins to descend. At this time, the protrusion 51 formed on the tray 33 contacts the notch 129 of the cam body 115 with a constant frictional force, and prevents the cam body 115 from being rotated at high speed by the cam follower 102, thereby causing impact noise. This prevents damage to the disk 40 and clamper 34 from occurring.

That is, when the cam follower 102 descends, the cam body 115
The gear 128 is disengaged from the rack gear 50. On the other hand, the cam follower 102 of the clamper 34
is strongly abutted against the inclined portion 132 by being biased by the coil spring 108 . Here, the cam body 115 is in a state in which the direction of rotation of the cam body 115 urged by the cam follower 102 and the direction of rotation of the cam body 115 by the motor 111 match, so the cam follower 102 is rotated by the force of the coil spring 108. Therefore, there is a concern that the cam body 115 is forcibly rotated faster than the rotation by the motor 111 while the inclined portion 132 is lowered at a high speed. Here, the drive gears 118 and 119, the pinion gear 117, and the motor 111 act as loads on the cam body 115, but since the reverse biasing force of the cam follower 102 and the rotating direction of the motor 111 match as described above, these loads are It is not possible to completely suppress the above phenomenon alone. When the cam follower 102 descends at high speed, the chuck plate 92 of the clamper 34 collides with the disk 40 at high speed, impacting the disk into the turntable 3.
9, and press piece 1
05 collides with the pressed projection 66, and the convex portion 103 engages with the concave portion 104 in an impactful manner. Therefore, when such a phenomenon occurs, impact noise is generated and the disk 40 and clamper 34 may be damaged. In this device, the above-mentioned inconvenience is prevented by bringing the protrusion 51 formed on the tray 33 into contact with the notch 129.

Thus, the cam follower 102 descends smoothly, and the chuck plate 92 slowly descends to chuck the disk 40 onto the turntable 39. At this time, the pressing piece 105 presses the pressed projection 66, rotates the lifter 41, lowers the pawl 59, and brings the pawl 59 to the lower limit position. At this time, lifter 4
The shafts (lifter rotation fulcrums) 63 and 64 are provided on the opposite side of the claws (lifter claws) 59 and 59 with respect to the pressed protrusion (pressed portion) 66, as described above. The amount of movement (rotation amount) of the claws 59, 59 can be ensured with a small amount of pressure from the pressing protrusion 66. Therefore, as in this embodiment, the clamper 34 is of a rotating type, and the pressed protrusion 66 is positioned in front of the claws 59, 59 (at the rotation axis 99 of the clamper).
Even when the pressing stroke is made small as shown in FIG. The disk 40 is transferred from the claw 59 to the turntable 39 and is chucked by the chuck plate 92. Also, at this time, the convex portion 103 is the concave portion 1
04, and the tray 33 is locked so that it cannot be moved. At this point, the cam follower 102 is connected to the cam portion 1.
It is located on the flat part 131 of 25. The pin 136 of the cam body 115 is the limit switch 137.
The actuator 138 contacts the contact point 14 as shown in FIG. 21a.
Touch 0. This allows the control circuit to control motor 1.
11 is reversely rotated to slightly rotate the cam body 115 in the direction of arrow E, and when the actuator 138 is returned to the neutral position, the motor 111 is stopped. In this way, the mounting of the disk 40 is completed.

If you press the play button in this state, the motor 37 rotates, the disk 40 that is chucked to the turntable 39 rotates, and the signal recorded on this disk 40 is reproduced by a signal reproducing device (not shown). will be played.

As explained above, according to the present invention, a movable tray for transferring a disk and a clamper for the disk chuck are provided, and the disk placed on the tray in the open position is moved to the turntable by the clamper in the closed position. In a disc playback device configured to chuck, a lifter is disposed on the tray to move up and down the disc placed on the disc mounting part by moving in and out from the bottom of the disc mounting part, and this lifter is used as a clamper. Since it is configured to move up and down in conjunction with each other, even if the tray on which the disc is placed is moved horizontally relative to the turntable that is set in a fixed position, the disc will rise during the movement and will be mounted on the turntable. By lowering the disc at the same time, the disc can be installed smoothly. Moreover, in this case, since the vertical movement of the lifter is directly performed by the clamper (the vertical movement of the lifter), it is only necessary to determine the timing of the movement of the clamper in conjunction with the movement of the tray, and the timing of the clamper and lifter can be adjusted. That is, the operation of checking the lifter (disc) with the clamper after lowering and raising the lifter (disk) after releasing the chuck with the clamper can be reliably executed without complicated timing adjustments. In this invention, since the tray portion is configured simply by disposing a lifter on the tray, there is an advantage that this portion can be made smaller and lighter. Furthermore, unlike in the prior art, there is no need to build the drive source of the turntable into the tray or to move the turntable itself up and down, so the configuration of the tray drive system can be simplified and downsized. Furthermore, since the lifter is configured to be operated directly by the clamper as described above, there is no need to provide any mechanism for operating the lifter between the chassis and the lifter, which reduces the overall efficiency of the device. The drive system can be simplified and space can be saved, and the operation timings of the lifter and clamper can be well matched, and there is no risk of damaging the disk. Furthermore, since the rotation fulcrum of the lifter is provided on the opposite side of the lifter pawl to the pressed part, a large amount of rotation of the lifter pawl can be secured with a small amount of pressure on the pressed protrusion, so the clamper can be rotated. Even in the case of the type, for example, the pressed portion can be provided closer to the rotation axis of the clamper than the lifter claw, so that interference between the tray that moves back and forth and the pressing portion can be avoided as much as possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a conventional disc playback device, FIG. 2 is a side sectional view of the tray portion of the device shown in FIG. 1, and FIG. 3 is a schematic diagram showing another example of the conventional disk playback device. side sectional view of the section, Figures 4 to 2
0 is a diagram showing an embodiment of the present invention, FIG. 4 is a plan view of the main parts of a disc playback device to which the present invention is applied, FIG. 5 is a diagram illustrating FIG.
The figures are Fig. 4 - line sectional view, Fig. 7 is an enlarged view of the main part of Fig. 6, Fig. 8 is Fig. 4 - line sectional view, and Fig. 9 is a partially cut away tray section. Figure 4 - Linear view, Figure 10 is a partially cutaway Figure 4 - Linear view, Figure 11 is Figure 4 - Linear enlarged sectional view, Figure 12 is Figure 4 - Linear enlarged view. 13 is an enlarged sectional view taken from the line of FIG. 4, FIG. 14 is a bottom view of the tray portion, and FIG.
Fig. 16 is an explanatory diagram showing the lifter installation state, Fig. 17 is a sectional view taken from Fig. 4 - Fig. 18 is an enlarged view of the main part of Fig. 17, Fig. 19 The figure is an enlarged view of the cam body part in Figure 4, Figure 20 is an explanatory diagram showing the positional relationship between the cam body, the rack gear, and the protruding part, Figure 21 is an explanatory diagram of the operation of the disc playback device, and Figure 22 is an explanatory diagram of the tray. FIG. 23 is a top perspective view of the lifter, and FIG. 24 is a bottom perspective view of the lifter. 31...Device body, 33...Tray, 34...Clamper, 39...Turntable, 40...Disk, 4
DESCRIPTION OF SYMBOLS 1...Lifter, 46...Disk mounting part, 46a...Bottom surface, 50...Rack gear, 59...Claw (lifter claw),
63, 64... Axis (lifter rotation fulcrum), 66... Pressed projection (pressed part), 102... Cam follower, 1
08... Coil spring (biasing device), 111... Drive source (motor), 115... Cam body, 125... Cam portion, 128... Pinion gear.

Claims (1)

[Scope of Claims] 1. It has a disk mounting section, and has an open position where a disk is taken in and out of the disk mounting section, and a disk placed on the disk mounting section is rotationally driven by a turntable. a tray that is supported so as to be movable between a closed position and a closed position; a clamper that moves in a direction close to the turntable and chucks the disk placed on the disk mounting section to the turntable; a lifter claw for raising and lowering the disk placed on the disk placement part; and a pressed part facing the clamper on the upper surface side of the tray at a position other than the disk placement part of the tray; a lifter configured such that the lifter claw rotates around a lifter rotation fulcrum formed on the tray and located on the opposite side of the lifter claw with respect to the pressed part; a biasing device that biases the lifter in a direction to protrude from the bottom surface of the disk mounting portion; when the clamper approaches the turntable to chuck the disk onto the turntable, The pressing part provided on the clamper presses the pressed part of the lifter against the biasing force of the biasing tool, thereby causing the lifter claw to retract from the bottom surface of the disk mounting part, and The disc playback device is characterized in that the lifter is rotated so that the distance traveled by the lifter claw is greater than the distance traveled by the pressing part, and the lifter claw is retracted from the bottom surface of the disc mounting part. Disc lifting device.