JPH02134760A - Recording disk reproducing device - Google Patents

Abstract

PURPOSE:To rationalize the mechanism by using a rack and a pinion in pairs so as to carry a disk tray and to rationalize the mechanism, and using one set of simple mechanism so as to elevate/descend the disk. CONSTITUTION:A disk is placed on a tray 20, which is carried by a rack 22 and a pinion 28. The tray 20 is contained to a reproducing device from a gap between a turntable 4 and a clamper 34. A sub chassis 2 is supported turnably in the Z direction by pins 8, 9 at the rear side of a main body 1 and when an elevating/descending cam 12 is moved in a direction (x), a roller 10 lifts up the chassis 2. A motor 3 provided with the turntable 4 is fitted to the sub chassis 2 and a pickup 5 is moved in a direction of the (y) axis via rails 6, 7. The disk is clipped by the turntable 4 and the clamper 34. In this state, the motor 3 is driven to attain the recording and reproduction. The disk is extracted in the opposite order. Through the constitution above, the disk is loaded/ejected with a simple mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a recording disk reproducing device, and more particularly, to a recording disk reproducing device that optically reads information on an optical disk.

(Prior Art) Examples of conventional recording disk reproducing apparatuses are shown in FIGS. 16 to 24.

In addition to reproducing recorded signals on a disc, a recording disc reproducing apparatus has a function of automatically loading and unloading a disc, and these mechanisms are often complicated. FIG. 16 is a diagram showing the configuration of the main mechanism related to the disk loading and unloading functions of the recording disk reproducing apparatus.

A drive gear 104 a for transporting the disc tray 105 and raising and lowering the disc receiver [ 106 ] with respect to the chassis body 100 .

104b are provided on both sides of the shaft 101, and the motor (
Rotation is transmitted to the gear 103 by driving (not shown). A clamper bridge 109 with a disc clamper 110 above the disc tray 105
is provided with pins 1lla and 1ll on both ends.
b.

112a and 112b are provided, respectively.

The pins 112a and 112b are guided in the vertical direction by guide grooves 114a and 114b of the chassis body 100, and guide the movement of the disk clamper 110. In order to clamp the disc onto the turntable 121, the clamper bridge 109 has lifting cams 10 on the left and right sides.
7a.

An inclined groove cam 108a formed in 107b.

108b is used to perform lifting and lowering operations.

The disk tray 105 is constructed approximately as shown in FIG. The disc tray 105 and the disc holder have a structure in which plates 106 are overlapped. The tips of the pins 115 of the plate 106 of the disc holder are guided so as to be movable in the vertical direction on the left and right sides of the inside of the disc tray 105, and the disc holder is configured such that the plate 106 is attached to the left and right racks 1 on the lower side.
Elevating and lowering operations are performed by inclined groove cams 117 provided on 16a and 116b.

As shown in FIG. 18, the disk 150 is placed in the disk tray 1.
When the disc holder of No. 05 is placed on the plate 106 and stored in the player, the plate 106 and the clamper bridge 109 of the disc holder are lowered as shown in FIG. The disk 150 is pressed against the turntable 121 of the spindle motor 120. The disk holder plate 106 is lowered to a lower position than the disk 150 in this state and is no longer in contact with the disk 150, so when the spindle motor 120 rotates, the disk 150 rotates together with the disk clamper 110, and the playback starts. become possible.

In this conventional example, two operations are performed by moving the racks 116a and 116b using the gear 103 shown in FIG. That is, the movement of conveying the disk tray 105 and the movement of moving the disk 150, the disk clamper 110, and the clamper bridge 109 up and down to move the disk 150
It has the function of loading and unloading information onto and from the turntable 121.

The two operations of transporting the disk tray 105 and raising and lowering the disk 150 are not performed at the same time, and the next operation is performed after one operation is completed. In order to allow these to operate without interfering with each other, the structures and functions shown in FIGS. 20 to 24 are provided.

As shown in FIG. 20, an arm 119 is biased toward the rear of the rack 116 by a spring 120 so as to be rotatable about a support shaft 119a on the disk tray 105 as shown in FIGS. 21(a) to (d). It has been installed. A protrusion 119b is formed on the arm 119, and the protrusion 11
9b acts as a stopper to prevent the rack 116 from moving in the advancing direction of the rack 116 relative to the disk tray 105. As shown in FIG. 21(a), in this state, the rack 116 is connected to the gears 104a and 10
4b, the rack 116 and the disc tray 105 are moved together, and the disc tray 105 and the disc 150 are transported. Figure 21 (
When the disc 150 is transported to the storage position of the playback device main body as shown in b), the protrusion 119b of the arm 119 is moved by the guide stopper 125 provided on the chassis main body 100.
is pushed downward. As a result, Fig. 21(e)
As shown in (d), only the rack 116 is driven while the disk tray 105 remains in the storage position. As a result, the pin 115 of the disk holder plate 106 is
The disk 150 is lowered by the inclined groove cam 117 of the rack 116 and placed on the turntable 121 of the spindle motor 120 .

On the other hand, the back side of the rack 116 has a shape as shown in FIG. 22. This rack 116 and the lifting cam 1 in FIG.
07g and 107b are engaged with the protrusion 113b of the lever 113a, and the lower end of the protrusion 113b is engaged with the fourth part 113c formed on the chassis body 100 as shown in FIG. Figure 21 (a), (b)
), (c), and (d), Figures 24(a), (b), and (C) respectively.

The state shown in (d) is reached.

That is, in the states shown in FIGS. 21 and 24(a) to (d), the rack 116 transports the disk tray 105,
In the state shown in the figure and FIGS. 24(C) to 24(d), the protrusion 11 of the lever 113a remains stationary.
3b moves the elevating cams 107a and 107b in FIG.
can be clamped or unclamped.

The conventional example described above has the following problems.

- The disk tray 105 has a separate structure from the disk holder and the plate 106, and a large hole is formed in the disk tray 105 for the disk 150 to pass up and down, which is undesirable because the structure becomes weak in terms of strength.

・The disc support has separate elevating cams 108a for elevating the plate 106 and the clamper bridge 109, respectively.
, 108b and 117, which requires a large number of parts and many man-hours for assembly, which is uneconomical.

・The rack 116 and disk holder are the lifting mechanism of the plate 106,
There are two pairs of elevating and lowering mechanisms for the disc clamper 110 on the left and right, and one pair on the left and right is omitted, and -
If the functions can be performed as a set, the number of parts and assembly man-hours can be greatly reduced, and by simplifying the structure, it is possible to reduce costs and improve reliability.

- If even one tooth in the engagement between the left and right gears 104a, 104b and the rack 116 for conveying the disk tray 105 is misaligned, the balance between the left and right conveyance strokes will be lost, and the disk tray 105 conveyance will be There was a risk that the operation would malfunction.

(Problems to be Solved by the Invention) As described above, in the conventional recording disc playback device, there are problems such as insufficient strength of the disc tray, a large number of parts and assembly steps for the loading mechanism, and malfunction of the transport of the disc tray. There was a problem.

The present invention has been made in view of the above circumstances, and its purpose is to increase the strength of the disk tray, simplify the loading mechanism, and improve reliability.

[Structure of the Invention] (Means for Solving the Problems) A recording disk reproducing device of the present invention comprises: a main chassis; a sub-chassis supported by the main chassis in a movement means for raising the main chassis; A turntable placed on a sub-chassis and rotationally driven by a spindle motor, a disk tray on which a recording disk is placed and conveyed to the position of the turntable, and a conveyance means for conveying the disk tray to a predetermined position. , a disk clamper rotatably attached to a clamper bridge fixed to the main chassis; and an elevating means for elevating and lowering the sub-chassis so that the recording disc can be clamped between the disk clamper and the turntable. , a drive motor that serves as a drive source for the elevating and lowering means and a drive source for the conveying means, and when loading the recording disk, the driving force of the drive motor is first transmitted to the conveying means to move the disk tray. After transporting the sub-chassis to a predetermined position, the driving force of the drive motor is transmitted to the lifting operation means to raise the sub-chassis, and when unloading, the driving force of the drive motor is first transferred to the lifting operation means. driving force transmission switching means for transmitting the driving force of the drive motor to the conveying means to convey the disk tray and draw out the recording disk after lowering the sub-chassis; It is characterized by comprising: a recording and reproducing means for reproducing information recorded on the disc;

Further, in the recording disk reproducing apparatus according to claim 2,
The disk holder is attached to a disk tray that is integrally constructed with a plate so that one rack can be slid thereon. The disc tray and rack are designed so that when the rack is driven by the drive pinion, the disc tray and rack can move together, or the rack can move alone while the disc tray is stopped at the storage position of the playback device. It is equipped with a lock arm that functions to lock and release. In connection with this, the chassis side is provided with a locker that locks a lock arm so that the disc tray is locked in the storage position and does not move. When only the rack is moved while the disk tray is stopped in the storage position,
A lift lever that engages with the rack and rotates by a predetermined angle is provided on the chassis side. The elevating lever moves an elevating cam for elevating the other end of the sub-chassis, which is equipped with a spindle motor, a pickup device, etc. and is supported at one end by the chassis, thereby elevating the sub-chassis and elevating the spindle motor. It is composed of The clamper bridge, which rotatably supports the disc clamper, is fixed to the chassis.

Furthermore, in the recording disk reproducing apparatus according to claim 3,
The lock arm and rocker used in claim 2 have a configuration in which another second rack is used instead of the lift lever, and the second rack is also engaged with the drive pinion in the same way as the first rack. ing. Since the first rack is not structured to be slidable relative to the disc tray, it can also be formed integrally with the disc tray. A first rack transports a disk tray, and a second rack moves an elevating cam that raises and lowers a subchassis on which a spindle motor, a pickup device, etc. are mounted. In order to allow these two operations, the disk tray and transport and the lifting and lowering of the spindle motor, to operate without interfering with each other, each rack is designed to restrict mutual movement and to properly mesh with the drive pinion. Each of the cams is provided with a function to enable the operation to be performed.

(Function) With this configuration, the disk tray has a disk tray that is integrated with the plate and has high strength, and only performs sliding movement and does not move up and down.

Neither the disc clamper nor the clamper bridge moves up or down. This reduces the number of parts and simplifies the mechanism.

In addition, there is only one pinion that drives the rack, so there is no need to align the meshing timing of the left and right gears as in the conventional example.

In addition, since only one set of mechanisms such as a lock arm, rocker, and elevating lever are required to switch between the two operations of transporting the disc tray and elevating and lowering the disc, the number of parts is reduced and a recording disc playback device with a simplified mechanism can be obtained. .

Further, in the configuration of claim 3, the lock arm, the locker,
Lift levers and the like are no longer necessary, and the second rack fulfills these roles instead.

This makes it possible to further simplify the mechanism and improve rationalization and reliability.

(Embodiment) A recording disk reproducing apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing the mechanism of a tenth embodiment of the recording disk reproducing apparatus of the present invention.

A sub-chassis 2 is provided separately from the chassis main body 1,
The sub-chassis 2 is attached to the chassis main body 1 by means of lifting movement, as will be described later. A spindle motor 3 equipped with a turntable 4 is attached to the subchassis 2.

The pickup device 5 is also guided by guide rails 6.7 and attached to the sub-chassis 2 in a movable structure in the y-axis direction. The sub-chassis 2 is supported by pins 8 and 9 at a rear position of the chassis body 1 so as to be rotatable in two directions (lifting operation means), and a roller 10 provided on the front side of the sub-chassis 2 is a lifting cam. The sub-chassis 2 is moved up and down by changing the position in the Z-axis direction by moving the sub-chassis 12.

The cylindrical portion 10b at the base of the roller 10 of the sub-chassis 2 is
The slit 11b provided in the bracket 11 determines or regulates the lateral position of the roller 10, which has the effect of suppressing vibrations in the in-plane direction due to dynamic imbalance of the disk, which occurs particularly when the disk rotates.

As a feed drive means of the pickup device 5, a feed operation is transmitted from a feed drive motor 16 to the rack 13 via a gear 15 and a pinion 14.

The elevating cam 12 is supported slidably in the axial direction of the bracket llx. The bin 17 of the lifting cam 12 is the lifting lever 1
It is engaged with 8.

The disc tray 20 has guide grooves 21 on its bottom surface and both sides.
is guided by a guide mechanism (not shown) such as a roller provided on the chassis body 1, and is slid in and out of the chassis body 1 (transported) in the y-axis direction. The disk tray 20 is located below the disk tray 20.
A rack 22 having the function of transporting the discs and moving the elevating lever 18 is slidably attached to the disc tray 20 through a long hole 23 formed in the rack 22. A protrusion 22a is formed on the rack 22,
Further, a recess 25 is formed in the bent portion 24 formed in the rack 22. As a means for driving the rack 22, a loading drive motor 26 is installed in the chassis body 1. Reduction gear 27. A drive pinion 28 is provided and meshes with the rack 22.

Furthermore, as shown in FIG.
Two lock arm brackets are attached to the bottom of the. The lock arm bracket 29 rotatably supports a lock arm 31 with a pin 30. lock arm 3
1 is biased by a spring 32 in the direction of arrow A1. A locker 33 having a recess 33b that engages with the lock arm 31 is provided in the chassis body 1. A disk clamper 34 is rotatably attached to a clamper bridge 35 above the turntable 4 placed near the center of the chassis body 1, and the clamper bridge 35 is fixed to the chassis body 1 as shown in FIG. .

The operations of the recording disk reproducing apparatus configured as described above will be explained below in order.

To load a disc, as shown in FIG. 2, the disc 40 is placed on the pulled out disc tray 20, and the disc tray 20 is transported and stored. At this time, since the sub-chassis 2 is in the lowered position by the elevating cam 12, the disc tray 20 on which the disc 40 is placed is
The disc passes through the gap between the turntable 4 and the disc clamper 34 and is stored in the playback device.

Next, as shown in FIG. 3, the elevating cam 12 is moved in the X direction to push up the roller 10 and raise the sub-chassis 2, which causes the turntable 4 to move toward the disk tray 20.
The disc 40 placed on the turntable 4 can be lifted and brought into contact with the disc clamper 34, and the disc 40 can be clamped between the turntable 4 and the disc clamper 34.

In this state, the spindle motor 3 performs a predetermined rotation, and a recording or reproducing state can be achieved.

Next, to unload the disk 40, the above-mentioned operation is reversed. That is, from the state shown in FIG. 3, the elevating cam is moved in the X direction to lower the sub-chassis 2 to the state shown in FIG. 2, and the disc tray 20 is pulled out to take out the disc 40.

The operations of transporting the disk tray 20 and raising and lowering the turntable 40 are performed in this manner, and these operations will be described in further detail with reference to FIGS. 4 and subsequent figures.

The relationship between these operations is shown in FIGS. 4 to 6.

For convenience of explanation, these figures show the drive pinion 28, rack 23, lock arm 31, locker 33, lift lever 18, etc. arranged below the disk tray 20 as seen from the top surface of the disk tray 20. It is. Fourth
The figure shows a state in which the disc tray 20 is being driven by a drive pinion 28 to be stored in the playback device.
FIG. 5 shows a state in which the disc tray 20 has been completely stored in the playback device, and from the state shown in FIG. 5 to the state shown in FIG.
When the driving pinion 28 rotates, the disc tray 20 remains in the storage position within the playback device and is moved to the rack 22 while being stopped.
The figure shows a state in which only one part of the body can be moved.

Explanatory diagrams of this operating principle are shown in FIGS. 7 to 9.

The states shown in FIGS. 7, 8, and 9 correspond to the states shown in FIGS. 4, 5, and 6, respectively.

As shown in FIG. 7(a), the protruding portion 31b of the lock arm 31 provided on the disk tray 20 is depressed into the recess 25 formed in the bent portion 24 of the rack 22, and as shown in FIG. 7(b). Since the lock arm 31 is held down by the stopper 29a of the lock arm bracket 29, the protrusion 31b of the lock arm 31 cannot escape from the recess 25. Sunaichi Disc Tray 20
Since the rack 22 is locked, when the drive pinion 28 rotates, the rack 22 is moved together with the disk tray 20, and the disk tray 20 is transported.

Next, when the disc tray 20 reaches a predetermined storage position as shown in FIG. 5, the lock arm 31 is moved by the cam portion 33b of the locker 33 in the direction opposite to the arrow AI (see FIG. 1). As a result, the lock arm 31 is removed from the stopper 29b of the lock arm bracket 29, as shown in FIG. 8(b). Then, the lock arm 31 becomes rotatable around the bin 30, so that the protrusion 31b of the lock arm 31 becomes able to escape from the recess 25 of the rack 22. In this state, the driving pinion 28
As the disc continues to rotate, the lock between the rack 22 and the disc tray 20 is released, and as shown in FIGS. 6 and 9, the disc tray 20 stops and remains stationary, and only the rack 22 is moved.

That is, the protruding portion 31b of the lock arm 31 is shown in FIG.
As shown in a), the disc comes off from the concave part 25 of the rack 22 and rides on the bent part 24 of the rack 22, and then falls into the fourth part 33c of the locker 33 and becomes unrelated to the movement of the rack 22. Tray 20 is thus locked.

In this way, when the isk tray 20 is locked in the storage position and only the rack 22 is driven, the protrusion 23 of the rack 22 is moved to the elevating lever 18 as shown in FIGS. 5 and 6.
The movement of the rack 22 causes the lift lever 18 to rotate. Then, the bin 17 of the elevating cam 12 engaged with the elevating lever 18 is moved as shown in FIGS. 5 and 6, that is, the elevating cam is moved in the X direction. 2 and turntable 4 rotate and rise. Then, the turntable 4 lifts the disc 40 placed on the disc tray 20 and abuts against the disc damper 34,
The disc 40 is clamped by the turntable 4 and the disc clamper 34, and becomes rotatable.

To alleload the disk 40, the above loading operations are performed in reverse order. That is, after the rotation of the disk 40 has stopped, if the drive pinion 28 is reversely rotated from the state shown in FIG. 6 and the rack 22 is moved in the returning direction, the disk tray 20 remains locked in the storage position and returns from the state shown in FIG. The state shown in FIG. 5 is reached, and the lock arm 31 becomes the state shown in FIGS. 9 to 8. As a result, the turntable 4 rotates downward, and the disc 40 separates from the disc scrubber 34 to become a disc! - Placed on Ray 20.

If the driving pinion 28 continues to rotate in the reverse direction, the disk tray 20 will be in the state shown in FIGS. 5 to 4, and the lock arm 31 will be in the state shown in FIGS. 8 to 7. That is, the protrusion 31b of the lock arm 31 escapes from the recess 33c of the locker 33 when it is separated from the locker 33, and the protrusion 31b of the lock arm 31 escapes from the recess 33c of the locker 33.
It falls into the recess 25 of No. 2 and is pulled by the spring 32, and moves to the position held down by the stopper 29b as shown in FIG. 7(b). As a result, the protrusion 31b of the lock arm 31 falls into the recess 25 of the rack 22 and cannot escape, so the rack 22 becomes locked to the disk tray 20, and the rack 22 is locked to the disk tray 20, and the disks are moved together as a body. The tray 20 is transported. This and rack 2
The protrusion 23 of No. 2 is disengaged from the notch 18b of the elevating lever 18, and the elevating lever 18 maintains the state shown in FIG. It is in a rotated and lowered state as shown in Figure 2.

As described above, when the driving pinion 28 moves one rack 22, the transport operation of the disk tray 20,
The movement of raising and lowering the disk 40 can be performed automatically in sequence.

Next, as a second embodiment of the present invention, FIGS.
This will be explained with reference to the figures.

FIG. 10 is an exploded perspective view showing a second embodiment of the recording disk reproducing apparatus of the present invention. Note that the same or corresponding parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted. In this method, as shown in FIGS. 2 and 3, the sub-chassis 2 rotates around the pins 8.9, thereby raising and lowering the disk tray 20 using the turntable 4 of the spindle motor 3. Disk 4 placed on
The method of loading and unloading by raising and lowering the disc tray 20 is the same as in the first embodiment, but the mechanism for switching between the two operations of transporting the disc tray 20 and raising and lowering the disc 40 is different.

Since the first rack 50 for transporting the disk tray 20 does not slide relative to the disk tray 20, the first rack 50 may be fixedly attached to the disk tray 20, or the first rack 50 may be fixedly attached to the disk tray 20, or as shown in FIG. It can also be formed in one piece as shown. Further, as shown in FIG. 10, the second rack 51 is configured to engage with the pin 17 of the elevating cam and mesh with the driving pinion 28. Disc tray 2
A first rack 50 and a second rack 51 provided in
A cam 52, 53 is formed on each of the racks, and when these racks mesh with the drive pinion 28, they have the function of regulating the movement of the rack so that the rack of the rack does not interfere with the rack.

12 to 14 show the relationship between these operations. For convenience of explanation, these figures show the driving pinion 28 and the first rack 50 disposed below the disk tray 20.
, the second rack 51, cams 52, 53, etc. are shown transparently from the top surface of the disk tray 20.

FIG. 12 shows the disk tray 20 being driven and transported by the driving pinion 28, FIG. 13 shows the disk tray 20 having been transported to its storage position, and FIG. 14 shows the disk tray 20 being transported by the drive pinion 28. 20 remains locked at the storage position, the second rack 51 is moved by the driving pinion 28, and the pin 17 of the elevating cam 12 is moved. A pin 17 of the elevating cam 12 is engaged with a long hole 54 provided in the second rack 51, and a spring 55 is inserted between the tip of the pin 17 and the second rack 51.
is being strung up. As a result, in the state shown in FIG. 12, the second rack 51 is pushed in the direction of arrow B1 by the spring 55. Further, a spring 57 is provided in the chassis body 1 at the rear position of the first rack 50, and when the disk tray 20 is in the storage position as shown in FIGS. 13 and 14, the first It functions to push the rack 50.

FIGS. 15(a) to 15(e) show the mutual operational relationship of the first rack 50, the second rack 51, the cams 52, 53 provided thereon, the driving pinion 28, etc.

In these figures, when the drive pinion 28 rotates clockwise in the figures, the rotation from FIG. 15(a) to FIG.
), (C), (d), and (e), and when rotating counterclockwise, it moves in the opposite direction to Fig. 15 (e).
) to Figure 15 (d), (c), (b),
It operates in the order of (a).

As shown in FIG. 12, the disc tray 20 is transported and the second
FIG. 15(a) shows a state in which the rack 51 is not in operation. The cam 53 is in contact with the cam 52, and the second rack 51 cannot contact the driving pinion 28. As a result, the rotation of the driving pinion 28 is not transmitted to the second rack 51, and the driving force is transmitted only to the first rack 50.
is transported.

When the disc tray 20 approaches its storage position and reaches the state shown in FIG. 15(b), the slope 52b of the cam 52 is
15(c) and 15(d), and the disc tray 20 is conveyed to the storage position. When transitioning from FIG. 15(b) to (e),
The second rack 51 that had been away from the drive pinion 28 approaches and begins to mesh with it, but at this time the second rack 51
The first tooth 51b of the drive pinion 28 meshes with the valley at the correct timing without hitting the peak of the gear. This is because the cam 53 is attached to the slope 52b of the cam 52.
This is an important point because the slopes 53b of the racks 50 and 51 are guided and the relative positions of the racks 50 and 51 are regulated to maintain correct timing.

In other words, the shapes of the cams 52 and 53 are such that, in the states shown in FIGS. It has become.

When the state changes from FIG. 15(b) to FIG. 15(C), the second rack 51 is not engaged with the driving pinion 28 at first, but the second rack 51 is moved from the first rack by a distance equal to the distance traveled by the second rack 151. As the rack 50 also advances and changes from the state shown in FIG. 15(c) to FIG.
Even after b leaves the drive pinion 28, the first rack 50 also advances by a distance equal to the distance traveled by the second rack 51, resulting in the state shown in FIG. 15(d). In this way, the cam 52
The first rack 50 and the second rack 5 are separated by the action of ゜53.
1 can be continuously switched between meshing with the drive pinion 28, and before and after these switchings, when one rack is meshing with the drive pinion 28, the other rack is not meshing. It can be made completely separate and unrelated.

The drive pinion 28 continues to rotate, and as shown in FIGS.
When changing to the state shown in the figure, the position of the pin 17 is on the left in the figure (the right end of the elongated hole 54), and the position of the pin 17 remains unchanged from the state shown in FIG. 12 until the state shown in FIG. 13 is reached. Second
This rack 51 is moved by the elongated hole 54.
When the rack 51 moves further and the left end of the elongated hole 54 begins to push the pin 17 to the right, the pin 17 begins to move. In other words, in this state, both racks 50 and 51 are moved as shown in FIG. When changing to the state e), that is, when changing from the state shown in FIG. 13 to the state shown in FIG. perform an action to raise the

When unloading the disk 40, the reverse operation is performed. That is, the state shifts from FIG. 15(c) to FIG. 15(a) in order.

Details regarding this unloading operation will be omitted.

As described above, by driving the drive pinion 28,
Two operations, elevating and lowering the disk 40 and transporting the disk tray 20, can be performed freely from one power source (motor 26) without mutual interference.

The method of the second embodiment simplifies the structure because the first rack 50 does not need to be slidably attached to the disk tray 20 and is fixed.

Furthermore, compared to the first embodiment, by providing a second rack 51 and cams 52 and 53, the lock arm 31
Mechanisms such as the locker 33 and the lifting lever 18 are no longer required, and the mechanism can be simplified.

Note that, as in the present invention, the sub-chassis 2 is rotatably supported with respect to the main chassis 1 at two points, pins 8 and 9, and one point of the roller 10 of the sub-chassis 2 is pushed upward or downward. It becomes. This roller 10
is guided by a lifting cam 12 slidably attached to the main chassis 1.

That is, the sub-chassis 2 is supported with respect to the main chassis 1 at three points: the pins 8 and 9 and the rollers 10. On the other hand, the main chassis 1 may be subject to twisting depending on where the recording/reproducing device is placed. That is, when the device is installed on a sloped or uneven surface, the main chassis 1 may be slightly twisted. In such a case, if the turntable is attached to the main chassis 1 as in the past, and the pickup means is also attached to the main chassis 1, both will be directly affected by the torsion of the main chassis 1. Stable recording and playback cannot be performed.

However, in the present invention, as described above, the sub-chassis 2 is supported by the main chassis 1 at three points, and is not affected by the torsion of the main chassis 1 at all. Since the turntable 4 and the pickup 15 are attached to the sub-chassis 2, stable recording and reproduction can be performed regardless of the influence of torsion of the main chassis 1.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be modified and used in various ways without departing from the gist thereof.

[Effects of the Invention] As detailed above, according to the recording disk reproducing apparatus of the present invention, the disk tray is conveyed by a set of racks and pinions, and the meshing timing of the left and right gears is different from that of the conventional example. There is no need to maintain this, and the mechanism can be greatly simplified. Furthermore, when loading or unloading a disc, there is no lifting or lowering of the disc clamper or disc tray, which greatly simplifies the mechanism. Furthermore, the means for switching between the two operations of transporting the disk tray and lifting and lowering the disk can be performed with a single set of simplified mechanisms, instead of having two sets on the left and right as in the conventional example. The effects of streamlining the mechanism and improving reliability are significant.

[Brief explanation of the drawing]

FIG. 1 is a structural exploded perspective view of a recording disk reproducing apparatus according to a first embodiment of the present invention, FIGS. 2 and 3 are sectional views of the recording disk reproducing apparatus of the present invention, and FIGS. 4 to 6 7 to 9 are partial operation explanatory diagrams relating to the recording disc reproducing apparatus of the present invention. FIG. 10 is a diagram explaining the operation of the recording disc reproducing apparatus of the present invention. FIG. 11 is a structural perspective view of the back side of the disk tray of the second embodiment of the present invention, and FIGS. 12 to 14 are recording disc playback of the second embodiment of the present invention. FIG. 15 is an explanatory diagram of the operation of the apparatus, FIG. 15 is a partial operation explanatory diagram of the recording disc reproducing apparatus according to the second embodiment of the present invention, FIG. 16 is an exploded perspective view of a partial structure of the conventional recording disc reproducing apparatus, and FIG. 18 and 19 are cross-sectional views explaining the operation of the conventional example, FIG. 20 is a partial structural perspective view of the conventional example, and FIG. 21 is a portion explaining the operation of the conventional example. FIG. 22 is a partial perspective view of the back side of a conventional rack, FIG. 23 is an exploded perspective view of a partial structure of the conventional example, and FIG. 24 is a partial structural perspective view for explaining the operation of the conventional example. 1...Chassis body 2...Sub-chassis 3...Spindle motor 4...Turntable 5...Pickup device 12... ... Lifting cam 18 ... Lifting lever 20 ... Disk tray 22 ... Rack 28 ... Drive pinion 31 ... Lock arm 33 ...Rocker 50 ...First rack 51 ...Second rack 52 ...Cam 53 ...Cam

Claims (1)

[Scope of Claims] (1) A main chassis, a sub-chassis supported by the main chassis so as to be movable up and down with respect to the main chassis, and a turntable placed on the sub-chassis and rotationally driven by a spindle motor. a disc tray on which a recording disc is placed and transported to the position of the turntable; a transport means for transporting the disc tray to a predetermined position; and a disc tray rotatably attached to a clamper bridge fixed to the main chassis. a disc clamper, a lifting means for raising and lowering the sub-chassis so that the recording disc can be clamped between the disc clamper and the turntable, a drive source for the raising and lowering means, and a drive source for the conveying means. a drive motor that also serves as a drive motor; and when loading the recording disc, the drive force of the drive motor is transmitted to the transport means to transport the disc tray to a predetermined position; The driving force of the drive motor is transmitted to the lifting operation means to raise the sub-chassis, and when unloading, the driving force of the drive motor is transmitted to the lifting operation means to lower the sub-chassis. a driving force transmission switching means for transmitting a driving force to the transporting means to transport the disc tray and pull out the recording disk; and a recording and reproducing means for reproducing information recorded on the recording disk. A recording disk reproducing device comprising: (2) The driving force transmission switching means includes: a rack slidably attached to the disk tray; a rack attached to the main chassis and locked so that the rack and the disk tray move together; a lock arm that releases the lock so that the rack can slide relative to the disk tray; and a lock arm that is attached to the main chassis and locks the rack and the disk tray until the disk tray is transported to the predetermined position. and a locker that releases the lock after the disk tray has been transported to the predetermined position and controls so that only the rack moves, and the lifting/lowering means is attached to the main chassis and controls only the rack. an elevating lever that engages with the rack and rotates by a predetermined angle when moving; and an elevating cam that is attached to the main chassis and movable by rotation of the elevating lever, and is provided on the sub-chassis. 2. The recording disk reproducing apparatus according to claim 1, wherein the raised/lowered protrusion is engaged with the lifting cam, and the sub-chassis is raised/lowered by movement of the lifting cam. (3) The driving force transmission switching means includes: a first rack fixed to the disk tray; a first inclined cam formed on the first rack; and the disk tray is transported near the predetermined position. The movement of the rack is restricted by the first rack until it is transported to the predetermined position, and when it is transported near the predetermined position, it engages with the first inclined cam, and after it is transported to the predetermined position, the first rack a second inclined cam that becomes movable when the engagement with the inclined cam is released; a second rack that is movably attached to the main chassis and includes the second inclined cam; and the first rack until the disk tray is conveyed to the predetermined position by a second inclined cam,
after the disk tray is transported near the predetermined position or to the predetermined position, a pinion means transmits the driving force from the drive motor to the second rack, and the elevating operation means comprises: It consists of an elevating cam attached to the chassis and movable by the movement of the second rack, the elevating cam is engaged with a protrusion provided on the sub-chassis, and the sub-chassis is raised and lowered by the movement of the elevating cam. 2. The recording disc reproducing apparatus according to claim 1, wherein: (4) The recording disk reproducing apparatus according to claim 1, wherein the sub-chassis is supported at three points relative to the main chassis. (5) The recording disc reproducing apparatus according to claim 1, wherein the recording/reproducing means is supported by the sub-chassis so as to be movable in a radial direction of the recording disc.