JP2003338118A - Player for recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the configuration of a tray driving mechanism without enlarging a casing. <P>SOLUTION: An upper tray 2 is moved by pinion 21 or 22 among an attachment/detachment position T1 for attaching/detaching a disk at the outside of the casing 1, a storage position T2 for storing the disk inside the casing 1, and a playing position T3 for playing the disk in the depth part of the casing 1. A lower tray 3 is held by the upper tray 2 by a lock lever 8 between the attachment/detachment position T1 and the storage position T2. When the upper tray 2 is moved from the storage position T2 to the playing position T3, holding by the lock lever 8 is released by a holding release rack which is arranged in the casing 1. Strength of the upper tray 2 is raised since the lower tray 3 is held by the upper tray 2. The holding of the lower tray 3 is released inside the casing 1, so that only the upper tray 2 is moved. Thus, the driving mechanism drives only the upper tray 2, so as to simplify the configuration. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc loading device for loading a disc as an information recording medium such as an optical disc or a magneto-optical disc into a disc device main body.

[0002]

2. Description of the Related Art In recent years, optical discs and magneto-optical discs (hereinafter simply referred to as discs) have rapidly spread as information recording media. Along with this, there is a demand for a disc loading device capable of accommodating a plurality of discs at the same time in order to easily handle the plurality of discs, and various disc loading devices have been created accordingly.

However, with this type of disc loading device, another disc could not be taken in and out or exchanged during reproduction or recording of one disc. Therefore, in order to insert or remove a disc that is not involved in reproduction or recording, it is necessary to interrupt the reproduction or recording of the disc or wait for the end of the reproduction or recording of the disc. Further, this type of disc loading device tends to be large in size because it accommodates a plurality of discs. Therefore, there is a need for a disc loading device that can eliminate such inconvenience.

Patent Document 1 discloses a disk reproducing apparatus which satisfies such a demand. This disc reproducing apparatus has a set of a sub tray and a main tray. The sub tray moves the disc from the disc exchange position outside the housing to the reproduction position. The main tray holds the sub tray movably between the disc exchange position and the standby position inside the housing.

Racks are provided on both the sub-tray and the main tray, and one pinion meshes with one of the racks. Specifically, the pinion moves to a position where it meshes with one of the racks by moving up and down along its own rotation axis by a pinion moving means including a pinion lifting cam. The pinion lifting cam is a cylindrical cam, and has a plurality of cam surfaces corresponding to the position of the pinion.

Further, this disc reproducing apparatus is provided with a reproducing portion elevating cam for moving the swing gear and the reproducing mechanism. The reproducing section lifting cam is a cylindrical cam for moving the reproducing section including the turntable and the optical pickup unit up and down, and has a plurality of cam surfaces according to the position of the reproducing section. The oscillating gear oscillates according to the rotation direction of the motor to rotate either the pinion elevating cam or the reproducing section elevating cam. Thereby, two kinds of cams can be driven by one motor.

[0007]

[Patent Document 1] Japanese Unexamined Patent Publication No. 7-252520

[0008]

However, in the above disc reproducing apparatus, the pinion is used in the reciprocating movement between the disc replacing position of the main tray and the standby position and the reciprocating movement between the standby position of the sub tray and the reproducing position. Is driven up and down so as to mesh with the rack of one tray. For this reason, it is necessary to provide a rack on each of the sub-tray and the main tray, which increases the cost of the disc reproducing apparatus.

In order to eliminate such inconvenience, it is conceivable to change the configuration of the disc reproducing apparatus so that the sub-tray is omitted and the disc is moved only by the main tray. However, in such a configuration, since it is necessary to move the portion of the main tray on which the disc is placed between the disc exchange position and the playback position, the movement distance of the main tray is longer than that in the configuration including the sub-tray. I can't help it. For this reason, the disk reproducing device requires a large housing to secure the moving distance of the main tray.

When both the sub-tray and the main tray are at the standby position, the tray not held by the pinion may move naturally. Therefore, the rack of the moved tray is displaced from the rack of the other tray. As a result, when the pinion is moved up and down to move the displaced tray again, the rack of the tray and the pinion may not mesh with each other.

The deviation of the rack can be eliminated by finely driving the pinion to correct the meshing position with the rack. In this method, the pinion is finely driven until the displaced rack reaches the correct mating position, and then at a preset speed to move the tray. For this reason, there is a possibility that a device for detecting that the displaced rack has reached the meshing position is required, or the control of the tray moving means that drives the pinion becomes complicated.

The shift between the racks disappears even if the pinion is moved in accordance with the shift of the racks. in this way,
The pinion is moved horizontally to the correct meshing position with the displaced rack. Therefore, a mechanism for moving the pinion relative to the sub tray or the main tray is required.

In the above-mentioned disc reproducing apparatus, the pinion raising / lowering cam and the reproducing portion raising / lowering cam are separately provided, and one of them is selectively driven by one motor. This drive mechanism uses a rocking gear that meshes with one of the gears provided on both cams, so that both cams are always rotated in the same direction. Therefore, selection of a plurality of tray pairs (a pair of sub-tray and main tray) and lifting / lowering of the playback section corresponding to each tray pair (collectively referred to as playback preparation operation) are performed in a fixed order. .

Therefore, the reproduction preparation operation for the uppermost stage or the lowermost stage shifts toward the lower stage or the upper stage, respectively. However, since the playback preparation operation for intermediate stages other than the uppermost stage and the lowermost stage shifts to only one of the upper stage and the lower stage, both cams have the highest cam face and the lowest cam face, respectively. Two cam surfaces with the same height are required on both sides. Moreover, each requires a device for detecting the position of the pinion and the position of the reproducing section,
Control of the tray moving means may be complicated.

In the above disc reproducing apparatus, when the main tray moves between the standby position and the disc exchange position, the pinion meshes only with the rack of the main tray and not with the rack of the sub tray. . Therefore, the sub-tray may move during the movement of the main tray, and the position of the sub-tray with respect to the main tray may shift.

Further, at the standby position, the reproduction position, or between these positions, the pinion is not meshed with the rack of the main tray and is held only by the housing. This retention requires an electrically driven retention mechanism,
The main tray must be made thick so as to have the strength to be held by the holding mechanism. In such a holding mechanism, it is necessary to release the holding when the rack of the main tray meshes with the pinion, but if the timing is not correct, the main tray cannot smoothly shift from the holding state to the moving state.

In the above-mentioned disc reproducing apparatus, the sub tray moving to the reproducing position is moved so that the reproducing unit including the turntable and the optical pickup unit does not come into contact with the moving disc due to the rotation of the reproducing unit lifting cam. The reproducing unit is retracted downward, and when the sub-tray reaches the reproducing position, the reproducing unit is moved upward and the disc is scooped up. Then, a clamper rotatably provided in the reproducing unit in the vertical direction is lowered to fix the disc to the turntable. Therefore, a mechanism for vertically rotating the clamper is provided exclusively. Moreover, since the clamper descends in an oblique direction, it may not be possible to securely fix the disc to the turntable.

In the above-mentioned disc reproducing device, a detecting device for detecting a disc exchange position, a standby position and a reproducing position, a detecting device for detecting a pinion position (a rotational position of the pinion lifting cam), and a reproducing portion position (reproducing position) It is necessary to separately provide a detection device for detecting the rotation position of the unit lifting cam). Further, a detection device for detecting the fixation or the release of the disk by the clamper may be required. Therefore, the disc loading control is performed based on the detection signals from the three or four types of detection devices as described above, and thus becomes more complicated.

In view of the above circumstances, the present invention mainly aims to simplify the structure of the drive mechanism of the tray without increasing the size of the housing.

[0020]

According to a first aspect of the present invention, there is provided a disk loading device which is capable of loading and unloading a disk outside a housing, and a housing position for housing the disk inside the housing. And a tray for moving the disc between the three positions while mounting the disc in a disc loading device for reciprocating the disc between the storage position and a reproduction position for reproducing the disc further inside the housing. Driving means for driving the tray, a reproducing mechanism for reproducing information recorded on the disc at the reproducing position, a reproducing mechanism elevating cam for elevating and lowering the reproducing mechanism by rotation, and the tray between the three positions. It is characterized by including a cam provided with a direction defining cam for changing the moving direction.

In the above construction, the rotation of the single cam can change the reciprocating direction of the tray between the three positions, and the playback mechanism can be moved up and down, thus simplifying the apparatus.

According to a second aspect of the present invention, in addition to the structure of the first aspect, a plurality of the trays are arranged and a plurality of the direction defining cams are provided so as to correspond to the plurality of trays, respectively. Each of the direction defining cams is characterized by defining the corresponding tray in a direction independent of the other trays by the rotation of the cam.

In the above arrangement, since a single cam can rotate, different operations can be given to a plurality of trays.
It is possible with a simple device to control a plurality of disks to perform different operations at the same time.

According to a third aspect of the present invention, in addition to the structure of the second aspect, the reproducing mechanism cam is provided with a horizontal portion for keeping the height of the reproducing mechanism constant by rotation, and the height of the reproducing mechanism is increased. The direction defining cam defines the direction of the tray that is not in the reproducing position when the disc placed on one of the trays is reproduced while maintaining a constant height.

With the above arrangement, it is possible to move a disc on one tray while the disc is being reproduced by moving a single tray by rotating a single cam. It is possible to provide a possible simplified device.

A disk loading device according to a fourth aspect is characterized in that, in addition to the configurations according to the first to third aspects, the cam has a cylindrical shape and the reproducing mechanism is provided inside the cam.

In the above structure, since the reproducing mechanism is provided inside the rotating cylindrical cam, the apparatus is further simplified.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] The following will describe one embodiment of the present invention with reference to FIGS. 1 to 16.

As shown in FIG. 2, the disc loading device according to the present embodiment includes a housing 1, and the housing 1 has an upper tray 2, a lower tray 3, a tray drive mechanism 4, and a reproducing mechanism unit 5. , The disk fixing mechanism 6 and the like are incorporated.

The upper tray 2 and the lower tray 3 are attached to the housing 1 so as to be movable in the arrow directions.
The disc 6 or the disc 7 as the information recording medium shown in FIG. 3A or 3B is conveyed from the outside to the reproduction mechanism unit 5 arranged in the inner part of the housing 1, and from the reproduction mechanism unit 5 to the outside. It is designed to be transported.

The upper tray 2 as the first tray is shown in FIG.
As shown in (a), circular recesses 2a and 2b having different diameters
have. The recess 2a is formed so as to accommodate the large-diameter disk 6 shown in FIG. 3 (a), and the recess 2b is formed so as to accommodate the small-diameter disk 7 shown in FIG. 3 (b). .

It should be noted that either the disk 6 or the disk 7 may be used including the second embodiment to be described later, but in the following description, only the disk 6 is used for convenience.

The upper tray 2 is, as shown in FIG.
The disc 6 is transported to the attachment / detachment position T1, the storage position T2, or the reproduction position T3. Detachment position T1
Is a position where the disc 6 is attached to and detached from the upper tray 2 outside the housing 1. The storage position T2 stores the disk 6 in the housing 1
This is a position for accommodating inside, and a position in the vicinity of the opening 1a (shown in FIG. 1 (b)) through which the upper tray 2 comes in and out from the housing 1. The reproduction position T3 is the storage position T2 in the housing 1.
It is a position where the disc 6 can be played further back than the above.

The upper tray 2 has a notch 2c having a substantially U shape. This notch 2c
A later-described pickup 51b (see FIG. 6 or 9) is raised to a position where information can be exchanged with the disc 6, and a later-described turntable 51a is formed so that the disc 6 can be picked up from below (FIG. 9). reference). Further, as shown in FIGS. 4 (a) and 5 (a), the upper tray 2 has guide portions 2d ... And guide rails 2e provided on the lower surface side at both side edge portions along the moving direction. There is.

The guide portion 2d is provided at three places,
Each has an L-shaped structure protruding downward.
The guide rail 2d has the same structure as the guide portion 2d, but is provided over substantially the entire side edge portion of the upper tray 2.

A position detecting cam 2 for detecting the position of the upper tray 2 is provided on the side end surface of the upper tray 2 on the guide portion 2d side.
f * 2g is provided. The position detection cam 2f is an end (front end) of the upper tray 2 on the side closer to the opening 1a.
To about the same length as the diameter of the recess 2a. The position detection cam 2g is formed so as to be recessed below the position detection cam 2f, and is provided from the vicinity of the front end of the upper tray 2 to the rear end thereof.

On the side end surface of the upper tray 2 on the guide rail 2e side, a rack 2h is formed almost all over the front end except for a predetermined portion. Further, at a predetermined position on the rack 2h, a stopper portion 2i protruding downward from the rack 2h is provided. The stopper portion 2i is formed so that a lock claw 36b, which will be described later, hits the stopper portion 2i (FIG.
3). Further, a locking portion 2j is provided near the rack 2h at the front end. The locking portion 2j protrudes in a substantially L-shape on the lower surface side so that a lock lever 8 described later can be locked.

The upper tray 2 is formed with a guide hole 2k vertically penetrating at a position inside the rack 2h. The guide hole 2k is provided for being held by the reproducing mechanism unit 5 as described later.

The lower tray 3 as the second tray is shown in FIG.
As shown in (b) and FIG. 5 (b), it has guide rails 3a and guide portions 3b, which are provided on the upper surface side at both side edge portions along the moving direction.

The guide rail 3a has an L-shape projecting upward and is provided over substantially the entire side edge portion of the lower tray 3. The guide portions 3b ... Are small pieces in the shape of a plate that protrudes inward, and are provided at three positions with appropriate intervals. The guide rails 3a are engaged with the guide portions 2d ... And the guide portions 3b ... Are engaged with the guide rails 2e, so that the upper tray 2 moves above the lower tray 3 in the storage position T2.
Is connected to the lower tray 3 so as to move slidably between the reproduction position T3 and the reproduction position T3.

On the side end surface of the lower tray 3 on the guide groove 3b side, a partial rack 3c is provided at a predetermined distance from the end (front end) of the lower tray 3 on the side close to the opening 1a. The partial rack 3c as the auxiliary rack is formed to be much shorter than the rack 2h.
At the same time, it meshes with pinions 21 and 22 described later. Further, a cutout portion 3d is provided substantially at the center of the side end surface on the rack 2h side. The cutout portion 3d is formed so as to engage with a lock claw 36c described later.

Position detecting cams 3e and 3f for detecting the position of the lower tray 3 are provided on the side end surface of the lower tray 3 on the guide rail 3a side. The position detection cam 3e is formed except for a portion from the front end of the lower tray 3 to a position substantially the same as the rear end of the partial rack 3c. The position detection cam 3f is formed so as to be recessed below the position detection cam 3e, and is provided from a position closer to the rear end to the position detection cam 3e to the rear end.

The upper tray 2 and the lower tray 3 configured as described above, the lock lever 8 serving as a holding member, and the spring 9 constitute a composite tray 10.

The lock lever 8 is an L-shaped flat plate member, and is rotatably supported by a pin 3g provided in the lower tray 3 near the partial rack 3c. A spring 9 is interposed between the lock lever 8 and the pin 3g. As shown in FIG. 5B, the lock lever 8 is urged by a spring 9 so that its tip projects outward. In addition, the lock lever 8 has a protrusion 8a that engages with the engaging portion 2j.
Are provided so as to project upward.

In such a structure, the lock lever 8 is
As shown in FIG. 16A, the lower tray 3 is held by the upper tray 2.

The positions of the upper tray 2 and the lower tray 3 are detected by the tray position detecting mechanism 15 shown in FIG. The tray position detection mechanism 15 is provided on the side wall of the housing 1, and has four switch levers 11 to 14 and a tray position detection switch (hereinafter referred to as a switch) SW1.
˜SW4.

The switch levers 11 to 14 are rotatably attached to the housing 1, and when the composite tray 10 is operated, the corresponding switches SW1 to SW are interlocked with it.
Turn 4 ON or OFF.

The switch lever 11 for operating the switch SW1 includes a support portion 11a, a contact portion 11b, and a lever portion 11c.
And the operation unit 11d. Support part 11
The a is formed in a columnar shape so as to be rotatably supported by the housing 1. The contact portion 11b is provided on the support portion 11a so as to contact the position detection cam 3f. Lever part 1
1c is provided so as to extend from the lower end of the support portion 11a to the switch SW1 arranged inside the housing 1. The operation portion 11d is a flat plate provided at the tip of the lever portion 11c, and is configured to operate the knob of the switch SW1 by rotating the lever portion 11c.

The switch lever 12 for operating the switch SW2 includes a support portion 12a, a contact portion 12b, ..., A lever portion 12
The switch lever 11 has the same structure as the switch lever 11. The contact portion 12b is provided on the support portion 12a so as to contact the position detection cam 3e.

The switch lever 13 for operating the switch SW3 includes a support portion 13a, a contact portion 13b, ..., A lever portion 13.
It is composed of c and the operation unit 13d. Support part 1
3a is formed in a columnar shape so as to be rotatably supported by the housing 1. The contact portions 13b ... Are provided on the support portion 13a so as to contact the position detection cam 2g. The lever portion 13c is provided so as to extend from the lower end of the support portion 13a to the switch SW3 arranged inside the housing 1. The operation portion 13d is a flat plate provided at the tip of the lever portion 13c, and is configured to operate the knob of the switch SW3 by rotating the lever portion 13c.

The switch lever 14 for operating the switch SW4 includes a support portion 14a, a contact portion 14b, and a lever portion 14c.
And the operation portion 14d, and has the same structure as the switch lever 13. The contact portion 14b is provided on the support portion 14a so as to contact the position detection cam 2f.

The above switches SW1 to SW4 are urged by springs (not shown) so as to be in the positions shown in FIG. 6 when they are not in contact with the position detecting cams 2f, 2g, 3e and 3f.

The tray position detecting mechanism 15 having the above-described structure turns on / off the four switches SW1 to SW4.
The positions of the upper tray 2 and the lower tray 3 are detected by the combination of the above. The ON / OFF states of the switches SW1 to SW4 according to the positions of the upper and lower trays 2 and 3 will be described below.

As shown in FIG. 8A, when the lower tray 3 is at the storage position T2, both the switches SW1 and SW2 are turned on. As shown in FIG. 8B, when the lower tray 3 is between the attachment / detachment position T1 and the storage position T2, the switch SW1 is turned on and the switch SW2 is turned off. Figure 8
As shown in (c), when the lower tray 3 is at the attachment / detachment position T1, both the switches SW1 and SW2 are turned off.

As shown in FIG. 7A, when the upper tray 2 is at the storage position T2 or outside thereof, the switch S
Both W3 and SW4 turn on. As shown in FIG. 7B, when the upper tray 2 is between the storage position T2 and the reproduction position T3, the switch SW3 is turned on and the switch SW4 is turned off. As shown in FIG. 7C, when the upper tray 2 is at the reproduction position T3, both the switches SW3 and SW4 are turned off.

As shown in FIG. 6, the tray drive mechanism 4 as the tray drive means includes two pinions 21 and 22, a pinion pulley 23, a pinion drive belt 24, pressing rollers 25 and 26, gears 27 to 30 and a drive mechanism. It includes a pulley 31, a drive belt 32, a pinion rotation motor 33, and a pinion rotation mechanism 35. The pinion rotating mechanism 35 as the pinion rotating means includes a base 36, a joint lever 37, a pinion rotating cam 41a ...
(See FIG. 12).

Although the tray drive mechanism 4 uses the pinion drive belt 24, a gear pair 39, 39 may be used instead of the pinion drive belt 24 as shown in FIG.

Pinions 21 and 22, pinion pulley 23
The pressing rollers 25 and 26 are rotatably mounted on the base 36. The pinions 21 and 22 are moved by the pinion rotating mechanism 35 to a position where they mesh with the rack 2h of the upper tray 2. The pinion pulley 23 is arranged between the pinions 21 and 22 and rotates the pinions 21 and 22 via the pinion drive belt 24. The pressing rollers 25 and 26 are the pinion pulley 2
Pinion drive belt 2 to pinion pulley 23 on both sides of 3
Press 4.

The gear 27 is arranged below the pinion pulley 23, and is coaxially connected to the pinion pulley 23 by a shaft 38 (see FIG. 11). Gear 27
Meshes with the gear 28, the gear 28 meshes with the gear 29, and the gear 29 meshes with the gear 30. Gear 30
Are coaxially coupled to the drive pulley 31 by a shaft. The drive belt 32 includes a motor pulley 33 a and a drive pulley 31 that are provided coaxially with the pinion rotation motor 33.
It has been handed over to. The pinions 21 and 22 and the pinion pulley 23 are driven by the driving force of the pinion rotation motor 33 being transmitted by such a driving force transmission mechanism.

The base 36 is supported by a shaft 38 so as to be rotatable about the rotation center of the pinion pulley 23. The base 36 has a rotating end portion 36a and lock claws 36b and 36c. The rotating end portion 36a is provided at the end on the pinion 22 side. Lock claw 36b
Is provided between the pressing roller 25 and the pinion 21,
The lock claw 36c is provided between the pressing roller 26 and the pinion 22. The lock claws 36b and 36c are shown in FIG.
As shown in FIG. 3, both project toward the rack 2h.

The joint lever 37 includes a main body 37a,
It is composed of a claw portion 37b. The main body 37a has a forked end, and holds the rotary end 36a so as to sandwich it. As shown in FIG. 6, the claw portion 37b has two claws at both ends, is fixed to the main body 37a, and is rotatably supported by the housing 1.

The joint lever 3 constructed in this way
7, the main body 37a swings by coming into contact with the pinion rotating cams 41a ... Base 36
Rotates with the swing of the main body 37a. By this operation, one of the pinions 21 and 22 is moved to the rack 2h.
It is possible to obtain a state in which the pinions 21 and 22 do not mesh with the rack 2h.

A main cam 41 having a substantially cylindrical shape is arranged in the inner portion of the housing 1. The main cam 41 is a member that rotates to cause the reproducing mechanism unit 5, the disc fixing mechanism 6, and the pinion rotating mechanism 35 to perform a predetermined motion. The reproducing mechanism unit 5 and the disc fixing mechanism 6 are arranged inside the main cam 41.

As shown in FIG. 9, the reproducing mechanism unit 5
Is composed of a reproducing mechanism 51, a holder 52, and a damper 53. The holder 52 is a reproduction mechanism 5
1, which is a member that covers the playback mechanism 5 via the damper 53.
Combined with 1. On the side wall of the holder 52, the driven pin 5 that is engaged with a playback mechanism elevating cam 41b ...
2a ... are provided at three locations. This driven pin 52a
Is moved up and down with the rotation of the main cam 41 to move the playback mechanism unit 5 up and down.

A holding projection 52b is formed on the upper surface of the holder 52 so as to project upward. The holding protrusions 52b are inserted into the guide holes 2k while the upper tray 2 is at the reproducing position T3 and the reproducing mechanism unit 5 is at a position where the disc 6 on the upper tray 2 can be reproduced, so that the holding protrusions 52b can move the upper tray 2 upward. Hold.

The reproducing mechanism 51 comprises a turntable 51a for rotating the disc 6, a spindle motor (not shown) for rotating the turntable 51a, a pickup 51b for optically exchanging information with the disc 6. . The pickup 51b is provided so as to be linearly movable in the direction of arrow AA.

The reproducing mechanism 51 may have a recording function as well as a reproducing function.

As shown in FIG. 10, the disk fixing mechanism 6 is composed of a stabilizer 54 and a stabilizer holder 55. The stabilizer 54 is
It is rotatably held by the stabilizer holder 55, and fixes the disk 6 placed on the turntable 51a.

The stabilizer holder 55 includes a horizontal plate 55a for holding the stabilizer 54 and the horizontal plate 55a.
It has a vertical plate 55b that is provided perpendicular to. The vertical plate 55b is provided with lifting guide pins 55c ... at five locations, an upper portion and a lower portion, and a driven pin 55d at one lower portion.
Is provided. The lifting guide pins 55c ... are the housing 1
It is fitted in a guide groove (not shown) provided in the above, and moves up and down with the rotation of the main cam 41 to move the stabilizer holder 55 up and down together with the stabilizer 54. The driven pin 55d is adapted to fit into a fixing mechanism elevating cam 41c, which will be described later, so as to elevate and lower as the main cam 41 rotates.

As shown in FIGS. 11 and 12, the main cam 41 has a pinion rotating cam 41a, a reproducing mechanism elevating cam 41b, a fixing mechanism elevating cam 41c, and a rotational position detecting cam 41d. And the cam drive mechanism 61
It is designed to be driven by rotation. A gear surface 41e is provided on the lower end of the outer peripheral surface of the main cam 41 over the entire circumference.

As shown in FIG. 6, the cam rotation drive mechanism 61 comprises gears 62 and 63, a cam rotation pulley 64, a cam rotation belt 65 and a cam rotation motor 66. The gear 62 meshes with the gear surface 41e and the gear 63. The gear 63 is coaxially connected to the cam rotating pulley 64 by the shaft 67. Cam rotation belt 65
Is spanned between a motor pulley 66 a and a cam rotation pulley 64 which are provided coaxially with the cam rotation motor 66.
The main cam 41 is driven by the driving force of the cam rotation motor 66 transmitted by such a driving force transmission mechanism.

The pinion rotating cams 41a are constituted by a pair of concave and convex portions formed on the outer periphery of the upper side of the main cam 41 (see FIGS. 22 (a) and 22 (b)), and the rotational position is detected. The cams 41d ... Are formed in a convex shape on the lower outer circumference of the main cam 41. Pinion rotation cam 41a ...
Are formed at predetermined intervals so that the joint lever 37 can move in accordance with the positions of the upper tray 2 and the lower tray 3. The rotational position detection cams 41d are provided at two positions above and below, and the cam position detection switches (hereinafter referred to as switches) SW11 and SW12 are turned on and off.
It is supposed to FF. Rotational position detection cam 41d
, Are arranged differently depending on the position along the horizontal direction, such as two positions above and below, one position only above and one position only below.

The switches SW11 and SW12 are attached to the housing 1 as shown in FIGS. The switches SW11 and SW12 are provided with a leaf spring having a contact portion for contacting the rotational position detection cams 41d, ...
It is turned on when it comes into contact with, and turned off when it does not come into contact with. Therefore, the switches SW11 and S
The W12 detects the rotational position of the main cam 41 by four combinations of ON / OFF of the switches SW11 and SW12 according to the arrangement of the rotational position detection cams 41d.

As shown in FIG. 11, the reproducing mechanism raising / lowering cams 41b ... Are formed in a groove shape so that the three driven pins 52a. In the reproducing mechanism elevating cams 41b, a portion for raising and lowering the reproducing mechanism unit 5 is formed obliquely, and a portion for not raising and lowering the reproducing mechanism unit 5 is formed horizontally. Further, the reproduction mechanism lift cams 41b are provided at intervals according to the intervals of the driven pins 52a so that the posture of the reproduction mechanism 51 is always kept horizontal.

The fixing mechanism elevating cam 41c has a driven pin 55.
One is formed in a groove shape so that d can be moved in a fitted state. Also in this fixing mechanism elevating cam 41c, a portion for elevating the stabilizer holder 55 is formed obliquely,
A portion that does not move the stabilizer holder 55 up and down is formed horizontally.

The arrangement positions of the pinion rotating cams 41a ... And the shapes of the reproducing mechanism elevating cams 41b ... and the fixing mechanism elevating cams 41c are associated with the arrangement positions of the rotational position detecting cams 41d. As a result, the positions of the upper and lower trays 2 and 3, the position of the reproduction mechanism unit 5 and the position of the stabilizer 55 are detected by the ON / OFF states of the switches SW11 and SW12. In addition, the main cam 41
Since the above-mentioned four types of cams are provided, the rotation of the main cam 41 causes the upper and lower trays 2 and 3, the reproducing mechanism 51, and the stabilizer 54 to move in association with each other.

Next, a specific operation centered on the tray drive mechanism 4 of the disc loading apparatus will be described.

As shown in FIGS. 13A and 13B,
When the upper tray 2 is at the storage position T2, the claw portions 37b do not contact the pinion rotation cams 41a ... Of the main cam 41, and the joint lever 37 is in the neutral state. At this time, the straight line connecting the centers of the pinions 21 and 22 is the rack 2h.
The pinions 21 and 22 do not mesh with the rack 2h because they are substantially parallel to.

The upper tray 2 is moved from the storage position T2 to the attachment / detachment position T.
14A and 14B, the claw portion 37b contacts the concave and convex pinion rotation cams 41a and 41a, so that the main body 37a moves in the direction of arrow B2 (counterclockwise). Turn clockwise). Along with this, the base 36 rotates in the direction of arrow C1 (clockwise). As a result, the pinion 21 meshes with the rack 2h, and the pinion 21 is driven from the pinion rotation motor 33 via the drive force transmission mechanism and the pinion pulley 23.
The driving force is transmitted to. As a result, the pinion 21 rotates and the upper tray 2 moves.

The upper tray 2 moves from the storage position T2 to the reproduction position T.
15 (a) and 15 (b), the claw portion 37b is arranged opposite to the case shown in FIG.
41a. Then, the main body 37a rotates in the direction of arrow B1 (clockwise), and along with this, the base 36 is
It rotates in the direction of arrow C2 (counterclockwise). As a result, the pinion 22 is meshed with the rack 2h, and the pinion rotation motor 33 is used in the same manner as when the pinion 21 rotates.
The driving force is transmitted from the pinion 22 to the pinion 22. As a result, the pinion 22 rotates and the upper tray 2 moves.

When the upper tray 2 moves from the storage position T2 to the reproduction position T3, the lower tray 3 is not held by the upper tray 2, that is, in a state in which it can move freely. Therefore, as shown in FIGS. 15A and 15B, the lock claw 36c engages with the cutout portion 3d as the base 36 rotates in the arrow C2 direction. As a result, the lower tray 3 is held at the storage position T2 so that it cannot move.

When the upper tray 2 in the storage position T2 moves, it moves to either the attachment / detachment position T1 or the reproduction position T3. At this time, as shown in FIGS. 13A and 13B, there is a state in which none of the pinions 21 and 22 on the base 36 mesh with the rack 2h. When the upper tray 2 is moved to the attachment / detachment position T1 from this state, contrary to the above case, the lower tray 3 is moved to the position shown in FIGS. Base 3
6 is rotated to release the holding by the lock claw 36c.

When none of the pinions 21 and 22 meshes with the rack 2h when the upper tray 2 is at the storage position T2, the upper tray 2 is in a state where it can move freely. As shown in FIGS. 13 (a) and 13 (b), the lock claw 36b hits the stopper 2i. As a result, the upper tray 2 is held so as not to move to the reproduction position T3 without permission. Further, at this time, the upper tray 2 has the partial rack 3c.
Strikes against the stopper 2i, so that the attachment / detachment position T1
It is also held so as not to move to.

As shown in FIGS. 16 (a) and 16 (b),
At the storage position T2, the lower tray 3 is held by the upper tray 2 by the protrusion 8a being locked by the locking portion 2j. Therefore, when the upper tray 2 is moved toward the reproduction position T3, the lower tray 3 also tries to move. On the other hand, the holding release cam 1b (holding release means) that releases the holding by the lock lever 8 is the rack 2h in the housing 1.
It is provided on the lower side of.

As a result, the lock lever 8 causes the lower tray 3 to hold its holding release cam at the release start position immediately before reaching the storage position T2 from the attachment / detachment position T1 as shown in FIGS. 16 (c) and 16 (d). Start contacting 1b. When both trays 2 and 3 reach the storage position T2, the lock lever 8 moves to the storage position T2, as shown in FIGS. 16 (e) and 16 (f).
As the upper tray 2 moves, it is pushed into the holding release cam 1b and rotates in the direction of arrow D1 against the biasing force of the spring 9 described above. As a result, the holding by the lock lever 8 is completely released.

In order to completely release the holding at the storage position T2, when the trays 2 and 3 reach the storage position T2, the protrusion 8a can be released from the engagement portion 2j.
The next operation cannot be performed smoothly. Therefore, FIG.
In the intermediate state between the state shown in (c) and the state shown in FIG. 16 (e), the engagement of the protrusion 8a with the engagement portion 2j can be released. However, by doing this, the lower tray 3
Just before reaching the storage position T2, the holding is released and left behind.

In contrast to this inconvenience, the present disk loading device is constructed so that the partial rack 3c and the rack 2h both mesh with the pinion 21 only between the release start position and the storage position T2. in this way,
The inconvenience as described above is avoided by driving the lower tray 3 by the pinion 21 in the section in which the holding by the lock lever 8 is incomplete.

With this structure, it is possible to easily release the holding of the lower tray 3 by the operation of the lock lever 8 and surely execute the operations required for the upper tray 2 and the lower tray 3. Further, as described above, by mechanically operating the upper tray 2 and the lower tray 3 between the positions T1 to T3, both trays 2 and 3 can be moved as desired.

When the lower tray 3 is held, the lock lever 8 is moved by the urging force of the spring 9 so that the arrow D
Rotate in two directions.

By the way, when the upper tray 2 moves between the storage position T2 and the reproducing position T3, it is necessary to avoid the disc 6 placed on the upper tray 2 from contacting the turntable 51a. Therefore, until the upper tray 2 reaches the reproducing position T3, the reproducing mechanism unit 5 is arranged at a position vertically separated from the moving area of the upper tray 2 by the reproducing mechanism lifting cams 41b. And the upper tray 2
When the reproducing mechanism unit 5 is lifted by the rotation of the reproducing mechanism elevating cam 41b after reaching the reproducing position T3, the turntable 51a scoops the disc 6 from the upper tray 2. In this way, reproduction can be performed with the disc 6 placed on the turntable 51a.

When the upper tray 2 is located at a position other than the reproduction position T3, the stabilizer 54 turns the turntable 51a.
Is located apart from above. Then, after the upper tray 2 reaches the reproduction position T3 and the turntable 51a scoops up the disc 6, the stabilizer 54 is moved to the turntable 51a side by the fixing mechanism elevating cam 41c. As a result, the disk 6 is pressed against the turntable 51a by the stabilizer 54 and fixed so as to be rotatable.

With the above structure, the upper tray 2 is held on the lower tray 3 by the lock lever 8 between the attachment / detachment position T1 shown in FIG. 1 (b) and the storage position T2 shown in FIG. 1 (c). Therefore, the composite tray 10 can have sufficient strength to mount and move the disk 6 outside the housing 1. At the reproduction position T2, the holding by the lock lever 8 is released, so that only the upper tray 2 moves to the reproduction position T3 shown in FIG. 1 (d).

In this disc loading apparatus, the composite tray 10, the reproducing mechanism unit 5 and the stabilizer 5 are used.
4 is moved by the rotation of the main cam 41. Thereby, for example, the switching operation for moving only the upper tray 2 and the movement of the reproducing mechanism unit 5 can be easily linked. In addition, the number of parts can be reduced and the control can be simplified. Moreover, by holding the upper tray 2 and the lower tray 3 by the lock claws 36a and 36b as needed, both trays 2 and 3 can be operated reliably.

[Second Embodiment] The following will describe another embodiment of the present invention with reference to FIGS. 7, 8, and 17 to 25. In the present embodiment, constituent elements having the same functions as those of the constituent elements in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In this embodiment, a plurality of disks 6 ... Can be stored at the same time by using the mechanism of the first embodiment,
Further, a disc loading device that can replace another disc 6 while reproducing one disc 6 will be described.

In the following, in order to simplify the explanation,
An example using three sets of composite trays 10 will be described. Further, the disks 6 and 7 may be mixed and stored in the composite tray 10.

As shown in FIGS. 17 and 18, the disc loading device according to this embodiment includes a drive unit 71 in which the tray drive mechanism 4 is stacked in three stages. The drive unit 71 operates so as to independently move the upper trays 2 of the composite trays 10 ...

The tray drive mechanism 4 in this drive unit 71 is composed of the pinion pulley 23 to the pinions 21 and 22.
Power is transmitted to the gears via two pairs of gears 39. The tray drive mechanism 4 includes a gear pair 39
Instead of including the pinion drive belt 24 (see FIG. 6), as in the tray drive mechanism 4 described in the first embodiment.
May be provided.

In the drive unit 71, as shown in FIG. 19, the main body 37a of each joint lever 37 is connected to the corresponding base 36 so that each base 3
It is located at the same height as 6. On the other hand, the upper body 37a
The claw portion 37b that is interlocked with the
The claw portion 37b interlocking with a is arranged in the middle stage, and the main body 3 in the lower stage
The claw portion 37b interlocking with 7a is arranged in the upper stage. As described above, the joint levers 37 have different shapes but have the same function.

Further, the disc loading apparatus is provided with three sets of composite trays 10 ... For accommodating three discs 6 as shown in FIG. 20 (c). When the upper and lower composite trays 10 are moved from the attachment / detachment position T1 to the reproduction position T3 via the storage position T2 in order to attach / detach or replace the disc 6, as shown in FIGS. , Middle and lower composite tray 10
Are placed in the storage position T2.

FIGS. 21 (a) and 21 (b) are views showing the outer peripheral surface and the inner peripheral surface of the main cam 41, respectively, developed in a band shape with the point O as the center. As shown in FIGS. 21 (a) and 21 (b) and FIG. 19, the main cam 41 in the present disk loading device is a pinion rotation cam 41a so as to correspond to the three sets of composite trays 10.
..., playback mechanism elevating cam 41b ..., fixing mechanism elevating cam 41
c and rotational position detection cams 41d ...

Specifically, the pinion rotating cams 41a ... Are arranged in three rows, and the rotational position detecting cams 41d ... Are arranged in four rows. The pinion rotation cams 41a ... Are rotational positions P1 to P13 (see FIG. 25) of the main cam 41 which will be described later.
It is provided so as to select the meshing state of the pinions 21 and 22 in accordance with (see). As shown in FIGS. 22 (a) and 22 (b), the pinion rotation cams 41a, 41a are paired and arranged in two upper and lower stages, one of which is formed in a concave shape and the other of which is formed in a convex shape. ing.

The pinion rotation cams 41a and the rotational position detection cams 41d are arranged in order from the left side in FIG.
It corresponds to. Further, the cam located at the right end in FIG. 21 (a) is an auxiliary cam 41f ... For detecting that the main cam 41 has rotated once. Main cam 41
When it is detected that these auxiliary cams 41f have made one round, they are driven to rotate in the opposite direction.

On the other hand, the reproducing mechanism raising / lowering cams 41b ... and the fixing mechanism raising / lowering cams 41c are located at positions corresponding to the states of the upper tray 2 and the lower tray 3 in each composite tray 10 (FIG. 2).
4 and FIG. 25), the turntable 51a and the stabilizer 54 are formed so as to move up and down.

Further, the reproducing mechanism elevating cam 41b includes an inclined portion 41b1 which is inclined to raise and lower the reproducing mechanism unit 5 and a horizontal portion 41b2 which is horizontally formed so as not to raise and lower the reproducing mechanism unit 5. have.
The fixing mechanism raising / lowering cams 41c ...
It has a horizontal portion 41c2 formed horizontally so as not to move the disc fixing mechanism 6 up and down. As shown in FIG. 21C, the respective parts of the reproducing mechanism elevating cam 41b ... And the fixing mechanism elevating cam 41c described above correspond to the rotational positions P1 to P13 of the main cam 41, respectively.

As shown in FIG. 19, the present disc loading device has a cam position detection switch (hereinafter referred to as a switch) S operated by the rotational position detection cams 41d.
It is provided with W11 to SW14. This switch SW11
.. to SW14 are turned on / off depending on whether or not there is contact with the rotational position detection cams 41d ... Of each row. Therefore, it is possible to identify 14 different rotational positions of the main cam 41 described later by the ON / OFF combinations of the switches SW11 to SW14.

As shown in FIG. 23, this disc loading device is provided with a tray position detecting mechanism 15 for detecting the operating position of the composite tray 10, as in the disc loading device of the first embodiment. The tray position detection mechanism 15 includes tray position detection switches (hereinafter, referred to as switches) SW1 to SW4 mounted on the substrate 72.
Are operated by the switch levers 11 to 14, respectively. The switch levers 11 to 14 according to the present embodiment are the switch lever 1 according to the first embodiment.
Although the basic structure is the same as that of Nos. 1 to 14, each of the three sets of composite trays 10 is operated individually.

Specifically, the switch lever 11 has three abutting portions 11b ... Abutting on each of the three sets of composite trays 10. Switch lever 12 ・ 13 ・ 1
Similarly, 4 has three contact portions 12b ..., 13b ..., 14b.
…have.

The switch SW1 is turned off when any one of the lower trays 3 is at the attaching / detaching position T1. The switch SW2 is turned ON only when all the three lower trays 3 are in the storage position T2. The switch SW3 is turned on only when all the three upper trays 2 are in the storage position T2. For the switch SW4, one of the upper trays 2 is at the storage position T2.
Turns off when moving from to inside.

As described in the first embodiment, the switches SW3 and SW4 and the switch levers 13 and 14 are the upper trays at the storage position T2, between the storage position T2 and the reproduction position T3, and at the reproduction position T3. Different operations are performed with respect to the position 2 (see FIGS. 7A to 7C). Furthermore, the switches SW1 and SW2 and the switch levers 11 and 12 are, as described in the first embodiment,
Different operations are performed between the storage position T2 and between the storage position T2 and the attachment / detachment position T1 with respect to the respective positions of the lower tray 3 at the attachment / detachment position T1 (see FIGS. 8A to 8C).

The three sets of composite trays 10 operate in 16 tray operation modes (hereinafter, referred to as modes) M1 to M16 shown in Table 1 based on combinations of ON or OFF of the four switches SW1 to SW2. To do.

[0112]

[Table 1] The modes M1 to M16 will be described in detail below.

Mode M1: All the switches SW1 to SW4 are turned on. At this time (see FIG. 7A and FIG. 8A)
As shown in FIG. 3, the upper trays 2 ... And the lower trays 3 ... Are all at the storage position T2.

Mode M2: Only switch SW4 is OFF
Then, the other switches SW1 to SW3 are turned on. At this time, as shown in FIGS. 7B and 8A, one upper tray 2 is between the storage position T2 and the reproduction position T3, and all the lower trays 3 ... Are in the storage position T2. is there.

Mode M3: Switches SW3 and SW4 are O
FF is performed, and the switches SW1 and SW2 are turned on. At this time, as shown in FIG. 8A, all the lower trays 3 are in the storage position T2, and as shown in FIG. 7C, one upper tray 2 is in the reproduction position T3.

Mode M4: Only switch SW2 is OFF
Then, the other switches SW1, SW3 and SW4 are turned on.
At this time, as shown in FIG. 8B, one lower tray 3
Between the storage tray T2 and the attachment / detachment position T1 together with the upper tray 2 which is paired with each other, and as shown in FIG. 7A, the other trays 2 and 2 are in the storage tray T2. That is, in this state, one set of the composite trays 1
0 moves between the storage position T2 and the attachment / detachment position T1 in order to attach / detach the disc 6.

Mode M5: Switches SW1 and SW2 are O
FF is performed, and the switches SW3 and SW4 are turned on. At this time, as shown in FIG. 8C, one lower tray 3 is in the attachment / detachment position T1 together with the paired upper trays 2, and FIG.
As shown in (a), the other upper tray 2.2 is stored at the storage position T.
In 2.

Mode M6: Only switch SW1 is ON
Then, the switches SW2 to SW4 are turned to 0FF. At this time,
As shown in FIG. 8 (b), the lower trays 3 ... Are located between the attachment / detachment position T1 and the storage position T2 together with the paired upper trays 2, and as shown in FIG. Tray 2 is in the playback position. That is, in this state, the disc 6
2 sets of composite trays that are not involved in playback during playback
Either one of the ten moves between the storage position T2 and the attachment / detachment position T1 in order to attach / detach the disc 6.

Mode M7: All the switches SW1 to SW4 are turned off. At this time, as shown in FIG.
The lower tray 3 of the two sheets is in the attachment / detachment position T1 together with the upper tray 2 which is a pair, and as shown in FIG. 7C, one of the upper trays 2.2 of the other two sheets is in the reproduction position T3. Exists. In this state, while the disc 6 is being reproduced, one of the two sets of composite trays 10 not involved in the reproduction is in the attachment / detachment position T1 for attaching / detaching the disc 6.

Mode M8: Switches SW2 and SW4 are O
FF is performed, and the switches SW1 and SW3 are turned on. At this time, as shown in FIG. 8B, one lower tray 3 exists between the attachment / detachment position T1 and the storage position T2, and
As shown in (b), one upper tray 2 is stored at the storage position T2.
And the reproduction position T3. However, when the lower tray 3 is between the attachment / detachment position T1 and the storage position T2, the upper tray 2 must be in the state shown in FIG. 7A or 7C, so the above state is mechanical. Is impossible.

Mode M9: Only switch SW3 is ON
Then, the switches SW1, SW2, and SW4 are turned off. At this time, as shown in FIGS. 8 (c) and 7 (b), 1
The lower tray 3 of the sheet is at the attachment / detachment position T1 together with the upper tray 2 serving as a pair, and one of the other two upper trays 2 and 2 is between the storage position T2 and the reproduction position T3.
In this disc loading device, in principle, one disc 6 is attached or detached in a standby state of three discs 6 or a reproduction state of one disc 6. Therefore, the mode M9 which does not correspond to these,
It is treated as a mechanically impossible state.

When a combination of ON and OFF of the switches SW1 to SW4 in the above modes M8 and M9 is detected, a control unit (not shown) processes these modes as an error mode.

As shown in FIGS. 7C and 8C, when the switch SW1 is OFF, the switch SW2 is always OFF, and when the switch SW3 is OFF, the switch SW4 is always OFF. It is off. Therefore, the combination of ON / OFF of the switches SW1 to SW4 in the subsequent modes M10 to M16 is mechanically impossible (contradictory state). Therefore, when such a combination is detected, a control unit (not shown) processes these modes as error modes.

Mode M10: Only switch SW3 is 0F
Then, the other switches SW1, SW2, and SW4 are turned on.

Mode M11: Only the switch SW1 is OF
Then, the other switches SW2 to SW4 are turned on.

Mode M12: The switches SW2 and SW3 are turned off, and the switches SW1 and SW4 are turned on.

Mode M13: The switches SW1 and SW4 are turned off, and the switches SW2 and SW3 are turned on.

Mode M14: The switches SW1 and SW3 are turned off, and the switches SW2 and SW4 are turned on.

Mode M15: Only switch SW2 is ON
Then, the switches SW1, SW3, and SW4 are turned off.

Mode M16: Only switch SW4 is ON
Then, the switches SW1 to SW3 are turned off.

Next, the operation of the three upper trays 2 by the main cam 41 and the operation of the reproducing mechanism unit 5 in the disc loading apparatus will be described.

Here, as shown in FIG. 24, the vertical positions of the reproducing mechanism unit 5 and the stabilizer 54 are the turntable 51a and the stabilizer 5 respectively.
It is simply represented by 4. That is, the position of the turntable 51a is represented by E1 to E6, and the position of the stabilizer 54 is represented by F1 to F3.

Specifically, E1 shows the position of the disc 6 arranged in the upper stage when reproducing, and E2 shows the position when the disc 6 is moved by the upper tray 2. E3 indicates the position of the disc 6 arranged in the middle stage during reproduction, and E4 indicates the position of the disc 6 during movement by the upper tray 2. E5 indicates a position when the disc arranged in the lower stage is reproduced, and E6 indicates a position when the disc 6 is moved by the upper tray 2.

Further, F1 indicates the position of the disc 6 arranged in the upper stage during reproduction and the position of the disc 6 during movement by the upper tray 2. F2 is a disk 6 arranged in the middle stage
2 shows the position when the disc is reproduced and the position when the disc 6 is moved by the upper tray 2. F3 shows the position of the disc 6 arranged in the lower stage during reproduction and the position of the disc 6 during movement by the upper tray 2.

The playback cam unit 5 and the disc fixing mechanism 6 are moved up and down in the main cam 41, respectively.
It depends on the rotation position of. The relationship between the re-turntable 51a and the respective lifting positions of the stabilizer 54 with respect to each rotation position will be described below with reference to FIG.

In FIG. 25, in the disc reproduction / disc ejection, the operation of ejecting the disc from the disc reproduction state of each stage is represented by a solid line, a broken line, and a dashed-dotted arrow for the upper stage, the middle stage, and the lower stage, respectively. . The disc playing / disc ejection (α) shows the action of ejecting the disc of the other stage from the disc playing state of each stage, and the upper, middle, and lower discs are reproduced by the arrows of solid line, broken line, and dashed line. It shows the transition from the state to the disc ejection state to the middle, lower, and upper stages, respectively. During disc playback /
Disc ejection (β) also shows the operation of ejecting the disc in the other stage from the disc playing state in each stage. The solid line, the broken line, and the one-dot chain arrow indicate the lower stage from the disc playing state in the upper, middle and lower stages , Shows the transition to the upper and middle stages of the disc ejection state.

Further, in FIG. 25, the pinion 21.
The meshed state of 22 is represented as ON, and the non-meshed state is represented as OFF. Further, the holding state of the upper and lower trays 2 and 3 by the lock claws 36b and 36c is represented as ON, and the non-holding state is represented as OFF.

The rotational position P of the main cam 41 described below.
1 to P13 are, as shown in Table 2, switches SW11 to SW13.
It corresponds to the combination of ON / OFF of SW14 and each mode.

[0139]

[Table 2] Rotational position P1: Only the switch SW14 is turned on, and the switches SW11 to SW13 are turned off. At this time, the lower upper tray 2 is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M4, M5). The turntable 51a is at the position E6 and the stabilizer 54 is at the position F3. Further, only the lower pinion 21 meshes with the rack 2h of the lower upper tray 2. Then, the upper and middle upper trays 2 except the lower upper tray 2 are held by the lock claws 36b,
The upper and middle lower trays 3 except the lower tray 3 are held by the lock claws 36c.

Rotation position P2: Only switch SW12 is ON
Then, the switches SW11, SW13, and SW14 are turned off. At this time, the upper tray 2 in the lower stage is in a movable state between the storage position T2 and the reproduction position T3 (mode M1).
・ M2 ・ M3). The turntable 51a is at the position E6 and the stabilizer 54 is at the position F3.
Further, only the lower pinion 22 meshes with the rack 2h of the lower upper tray 2. And the upper tray 2 in the lower row
The upper and middle trays 2 except the upper tray 2 are the lock claws 36.
and the lower tray 3 ... is all locked by the lock claw 3
It is held by 6c.

Rotational position P3: switches SW12 and SW1
4 turns on, and switches SW11 and SW13 turn off. At this time, since the turntable 51a is at the position E5 and the stabilizer 54 is at the position F3, the disc 6 can be reproduced in the lower stage (mode M3). Further, the three sets of pinions 21 and 22 are not meshed with the racks 2h of all the upper trays 2 ... Further, the upper and middle upper trays 2 ... Excluding the lower upper tray 2 are held by the lock claws 36b, and all the lower trays 3 are held by the lock claws 36c.

Rotation position P4: Only switch SW11 is O
FF is performed, and the switches SW12 to SW14 are turned on. At this time, since the turntable 51a is at the position E5 and the stabilizer 54 is at the position F3, if the upper tray 2 in the lower stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the lower stage. is there. Further, the upper tray 2 on the upper stage is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4, M5, M6.
M7). Further, only the upper pinion 21 meshes with the rack 2h of the upper tray 2 on the upper stage. And mode M
In the case of 1, M4, M5, the middle upper and lower trays 2 and 2 excluding the upper tray 2 are the lock claws 36b and 36b.
Or in the modes M3, M6, and M7, the upper tray 2 of only the middle stage is held by the lock claw 36b, and in any mode, the lower tray 3 of the upper stage is held.
The lower and lower trays 3 and 3 except for the lock claw 3
It is held by 6c and 36c.

Rotational position P5: switches SW12 and SW1
3 is turned on, and the switches SW11 and SW14 are turned off. At this time, since the turntable 51a is at the position E5 and the stabilizer 54 is at the position F3, if the upper tray 2 in the lower stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the lower stage. is there. Further, the upper tray 2 in the middle stage is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4, M).
5 ・ M6 ・ M7). Further, only the middle-stage pinion 21 meshes with the rack 2h of the middle-stage upper tray 2. In the case of modes M1, M4 and M5, the upper tray 2 in the middle stage
The upper and lower trays 2 and 2 excluding the
6b / 36b, or mode M3 / M6
-In case of M7, the upper tray 2 of the upper stage only has the lock claw 36b.
And in each mode, the upper and lower lower trays 3 and 3 except the middle lower tray 3 are held by the lock claws 36c and 36c.

Rotation position P6: Only switch SW11 is O
Then, the switches SW12 to SW14 are turned off. At this time, the upper tray 2 in the middle tier has the storage position T2 and the reproduction position T.
It is possible to move between 3 and 3 (modes M1, M2,
M3). The turntable 51a is at the position E4 and the stabilizer 54 is at the position F2. further,
Only the middle pinion 22 is the rack 2 of the upper tray 2 in the middle stage.
It meshes with h. The upper and lower upper trays 2 ... Excluding the middle upper tray 2 are held by the lock claws 36b, and all the lower trays 3 are held by the lock claws 36c.

Rotational position P7: switches SW11 and SW1
3 is turned on, and the switches SW12 and SW14 are turned off. At this time, since the turntable 51a is at the position E3 and the stabilizer 54 is at the position F2, the disc 6 can be reproduced in the middle stage (mode M3). Further, the three sets of pinions 21 and 22 are not meshed with the racks 2h of all the upper trays 2, respectively. Further, the upper and lower upper trays 2 ... Excluding the middle upper tray 2 are held by the lock claws 36b, and all the lower trays 3 are held by the lock claws 36c.

Rotational position P8: switches SW11 and SW1
4 is turned on and the switches SW12 and SW13 are turned off. At this time, since the turntable 51a is at the position E3 and the stabilizer 54 is at the position F2, if the upper tray 2 in the middle stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the middle stage. is there. Further, the upper tray 2 in the lower stage is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4, M).
5 ・ M6 ・ M7). Further, only the lower pinion 21 meshes with the rack 2h of the lower upper tray 2. And in the case of modes M1, M4, and M5, the upper tray 2 in the lower stage
The upper and lower trays 2 and 2 except for the lock claw 3
6b / 36b, or mode M3 / M6
-In case of M7, the upper tray 2 of the upper stage only has the lock claw 36b.
And in each mode, the upper and middle lower trays 3 and 3 except the lower lower tray 3 are held by the lock claws 36c and 36c.

Rotation position P9: Only switch SW12 is O
FF is turned on, and switches SW11, SW13, and SW14 are turned on.
To do. At this time, since the turntable 51a is at the position E3 and the stabilizer 54 is at the position F2, if the upper tray 2 in the middle stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the middle stage. is there. Further, the upper tray 2 on the upper stage is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4, M).
5 ・ M6 ・ M7). Further, only the upper pinion 21 meshes with the rack 2h of the upper tray 2 on the upper stage. And in the case of modes M1, M4, and M5, the upper tray 2 on the upper stage
The upper and lower trays 2 and 2 excluding the
6b / 36b, or mode M3 / M6
・ In case of M7, the upper tray 2 of the lower stage only has the lock claw 36b.
And the lower trays 3 and 3 in the middle and lower stages except the lower tray 3 in the upper stage are held by the lock claws 36c and 36c in any mode.

Rotational position P10: switches SW11 and SW
12 is turned on, and switches SW13 and SW14 are turned off. At this time, the upper tray 2 in the upper stage is in a movable state between the storage position T2 and the reproduction position T3 (mode M1).
・ M2 ・ M3). The turntable 51a is at the position E2, and the stabilizer 54 is at the position F1.
Further, only the upper pinion 22 meshes with the rack 2h of the upper tray 2 on the upper stage. And the upper tray 2 on the upper level
The upper tray 2 ...
and the lower tray 3 ... is all locked by the lock claw 3
It is held by 6c.

Rotational position P11: switches SW11 to SW
All 14 turn on. At this time, turntable 51a
Is at the position of E1 and the stabilizer 54 is at the position of F1, so that the disc 6 can be reproduced in the upper stage (mode M3). In addition, there are three sets of pinions 21 and 22 each.
Are not meshed with the racks 2h of all the upper trays 2. Further, the middle and lower upper trays 2 ... Excluding the upper upper tray 2 are held by the lock claws 36b, and all the lower trays 3 are held by the lock claws 36c.

Rotational position P12: Only the switch SW14 is turned off, and the switches SW11 to SW13 are turned on. At this time, since the turntable 51a is at the position E1 and the stabilizer 54 is at the position F1, if the upper tray 2 in the upper stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the upper stage. is there. Further, the upper tray 2 in the middle stage is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4, M5, M6).
・ M7). Further, only the middle-stage pinion 21 meshes with the rack 2h of the middle-stage upper tray 2. In the modes M1, M4, and M5, the upper and lower upper trays 2 except for the middle upper tray 2 are held by the lock claws 36b, or in the modes M3, M6, and M7, only the lower upper tray. 2 is held by the lock claws 36b, and in any mode, the upper and lower lower trays 3.3 except for the middle lower tray 3 are locked by the lock claws 36c, 36.
It is held by c.

Rotational position P13: Only the switch SW13 is turned off and the switches SW11, SW12 and SW14 are turned on.
N At this time, since the turntable 51a is at the E1 position and the stabilizer 54 is at the F1 position,
If the upper tray 2 in the upper stage conveys the disc 6 to the reproducing position T3, the disc 6 can be reproduced in the upper stage. Also,
The lower upper tray 2 is in a state of being movable between the attachment / detachment position T1 and the storage position T2 (modes M1, M3, M4.
M5, M6, M7). Further, only the lower pinion 21 meshes with the rack 2h of the lower upper tray 2. And in the case of modes M1, M4, and M5, the upper tray 2 in the lower stage
The upper and lower trays 2 and 2 except for the lock claw 3
6b / 36b, or mode M3 / M6
・ In the case of M7, the upper tray 2 of only the middle tier has the lock claw 36b.
And in each mode, the upper and middle lower trays 3 and 3 except the lower lower tray 3 are held by the lock claws 36c and 36c.

Note that all the four switches SW11 to SW14 are turned off between the respective rotational positions. The upper tray 2 is provided between the rotation position P3 and the rotation position P4 or P5.
Remains at the playback position T3. The same is true between the rotational position P7 and the rotational position P8 or P9 and between the rotational position P11 and the rotational position P12 or P13.

Subsequently, changes in the rotational position and mode in the actual operation will be described with reference to FIG.

First, the transition from each reproduction state to another reproduction state in the three stages will be described.

In the transition from the upper stage to the middle stage in the reproducing state, first, the main cam 41 is rotated from the rotational position P11 and the mode M3 to the rotational position P10, whereby the turntable 51a is moved to E2. , The upper tray 2 from the reproduction position T3 to the storage position T
Move to 2. As a result, the tray operation mode is changed from the mode M3 to the mode M2 to the mode M1.

Next, the main cam 41 moves to the rotational position P10.
From the rotation position P6 to the rotation position P6, the turntable 51a moves to E4 and the stabilizer 54 moves to F2.
Then, the upper tray 2 in the middle stage moves from the storage position T2 to the reproduction position T3. As a result, the tray operation mode changes from the mode M1 to the mode M2 through the mode M2. Then, when the main cam 41 rotates from the rotation position P6 to the rotation position P7, the turntable 5
1a moves to E3.

When the reproduction state is changed from the middle stage to the upper stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition of the reproduction state from the middle stage to the lower stage, first, the main cam 41 rotates from the state of the rotational position P7 and the mode M3 to the rotational position P6, whereby the turntable 51a moves to E4, and
The upper tray 2 in the middle stage moves from the reproduction position T3 to the storage position T2. As a result, the tray operation mode changes from M3 to M2.
And changes to M1.

Next, when the main cam 41 rotates from the rotation position P6 to the rotation position P2, the turntable 51a moves to E6 in the lower stage, the stabilizer 54 moves to F3, and then the upper tray 2 in the lower stage is stored. The reproduction position T3 is moved from the position T2. As a result, the tray operation mode changes from the mode M1 to the mode M2 and then to the mode M3. Then, when the main cam 41 rotates from the rotation position P2 to the rotation position P3, the turntable 51a moves to E5.

When the reproduction state is changed from the lower stage to the middle stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition of the reproduction position from the lower stage to the upper stage, the main cam 41 moves the rotational position P3 and the mode M3.
When the turntable 51a is moved to E6 by rotating from the state to the rotation position P2, the lower upper tray 2 is moved from the reproduction position T3 to the storage position T2. As a result, the tray operation mode is changed from the mode M3 to the mode M2 to the mode M1.

Next, the main cam 41 rotates from the rotational position P2 to the rotational position P10, whereby the turntable 51a moves to E2 and the stabilizer 54 moves to F1.
Then, the upper tray 2 on the upper stage moves from the storage position T2 to the reproduction position T3. As a result, the tray operation mode changes from the mode M1 to the mode M2 and then to the mode M3. Then, as the main cam 41 rotates from the rotation position P10 to the rotation position P11, the turntable 51a moves to E1.

When the reproduction state is changed from the upper stage to the lower stage, the main cam 41 operates in the reverse order of the above procedure.

The transition from the reproduction state to the attachment / detachment state in the three stages will be described.

In the transition from the reproduction state to the attachment / detachment state in the upper stage, the main cam 41 rotates from the rotational position P11 and the mode M3 to the rotational position P10, whereby the turntable 51a moves to E2 and The upper tray 2 on the upper stage moves from the reproduction position T3 to the storage position T2.
Move to. As a result, the tray operation mode is changed from the mode M3 to the mode M2 to the mode M1.

Then, the main cam 41 moves to the rotational position P10.
From the rotation position P9, the turntable 51a moves to E3, and the stabilizer 54 moves to F2.
Then, the upper tray 2 on the upper stage moves from the storage position T2 to the attachment / detachment position T1. As a result, the tray operation mode changes from the mode M1 to the mode M4 to the mode M5.

Incidentally, in the transition from the attachment / detachment state to the reproduction state in the upper stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition from the reproduction state in the middle stage to the attachment / detachment state, the main cam 41 rotates from the rotational position P7 and the mode M3 to the rotational position P6, whereby the turntable 51a moves to E4 and
The upper tray 2 in the middle stage moves from the reproduction position T3 to the storage position T2. As a result, the tray operation mode is changed to the mode M3.
Changes to M1 through mode M2.

Then, the main cam 41 moves to the rotational position P6.
From the rotation position P5 to the rotation position P5, the turntable 51a moves to E5, and the stabilizer 54 moves to F3.
Then, the upper tray 2 in the middle stage moves from the storage position T2 to the attachment / detachment position T1. As a result, the tray operation mode changes from the mode M1 to the mode M4 to the mode M5.

Incidentally, in the transition from the attachment / detachment state to the reproduction state in the middle stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition from the reproduction state to the attachment / detachment state in the lower stage, the main cam 41 rotates from the rotational position P3 and the mode M3 to the rotational position P2, whereby the turntable 51a moves to E6 and
The upper tray 2 in the lower stage moves from the reproduction position T3 to the storage position T2. As a result, the tray operation mode is changed to the mode M3.
Changes to the mode M1 through the mode M2.

Then, the main cam 41 moves to the rotational position P2.
From the rotation position P1 to the rotation position P1, the turntable 51a moves to E6, the stabilizer 54 moves to the state of F3, and then the upper tray 2 of the lower stage moves while the stabilizer 54 maintains the position of F3. The storage position T2 is moved to the attachment / detachment position T1. As a result, the tray operation mode changes from the mode M1 to the mode M4 to the mode M5.

Incidentally, in the transition from the attachment / detachment state to the reproduction state in the lower stage, the main cam 41 operates in a procedure reverse to the above procedure.

Further, the transition to the loading / unloading state in the other stages, which is performed in parallel with the respective playback states in the three stages, will be described.

In the transition to the attachment / detachment state in the middle stage or the lower stage in parallel with the reproduction state in the upper stage, the main cam 41
By rotating from the state of the rotational position P11 and the mode M3 to the rotational position P12 (middle stage) or the rotational position P13 (lower stage), the turntable 51a and the stabilizer 54 are maintained in the horizontal state, and The upper tray 2 moves from the storage position T2 to the attachment / detachment position T
Move to 1. As a result, the tray operation mode changes from the mode M3 to the mode M6 to the mode M7.

Incidentally, in the transition to the attachment / detachment state in the middle stage or the lower stage in parallel with the reproduction state in the upper stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition to the detached state at the upper or lower stage in parallel with the reproduced state at the middle stage, the main cam 41
By rotating from the state of the rotational position P11 and the mode M3 to the rotational position P9 (upper stage) or the rotational position P8 (lower stage), the turntable 51a and the stabilizer 54 are maintained in the horizontal state, and The upper tray 2 moves from the storage position T2 to the attachment / detachment position T1. As a result, the tray operation mode is changed to the mode M.
It changes from 3 to mode M7 through mode M6.

Incidentally, in the transition to the detached state in the upper stage or the lower stage in parallel with the reproduction state in the middle stage, the main cam 41 operates in the reverse order of the above procedure.

In the transition to the attachment / detachment state in the upper or middle stage in parallel with the reproduction state in the lower stage, the main cam 41
From the state of the rotation position P3 and the mode M3 to the rotation position P4 (upper stage) or the rotation position P5 (middle stage), so that the turntable 51a stabilizer 5
4 is maintained in a horizontal state, and the upper tray 2 of the upper stage or the middle stage is moved from the storage position T2 to the attachment / detachment position T1. As a result, the tray operation mode changes from the mode M3 to the mode M6 to the mode M7.

Incidentally, in the transition to the attachment / detachment state in the upper or middle stage in parallel with the reproduction state in the lower stage, the main cam 41 operates in the reverse order of the above procedure.

As described above, in the present disc loading device, the main cam 41 collectively has the function of controlling the operations of the composite tray 10, the reproducing mechanism 5 and the disc fixing mechanism 6, so that the upper tray 2 ... The above operation can be similarly performed regardless of the number of upper trays 2. Therefore, if the present disc loading device has a structure capable of accommodating more than three discs 6 ..., The size reduction effect becomes more remarkable as compared with the conventional disc loading device.

[0182]

As described above, the disk loading device according to the first aspect of the present invention has a loading / unloading position at which the disk can be loaded / unloaded outside the housing and a storage position for housing the disk inside the housing. And a tray for moving the disc between the three positions while mounting the disc in a disc loading device for reciprocating the disc between the storage position and a reproduction position for reproducing the disc further inside the housing. Driving means for driving the tray, a reproducing mechanism for reproducing information recorded on the disc at the reproducing position, a reproducing mechanism elevating cam for elevating and lowering the reproducing mechanism by rotation, and the tray between the three positions. This is a configuration including a cam provided with a direction defining cam for changing the moving direction.

As a result, the rotation of the single cam can change the reciprocating direction of the tray between the three positions, and the playback mechanism can be moved up and down, thus simplifying the apparatus.

According to a second aspect of the present invention, in addition to the structure of the first aspect, a plurality of the trays are arranged and a plurality of the direction defining cams are provided so as to correspond to the plurality of trays, respectively. Each of the direction defining cams is configured to define the corresponding tray independently of the other trays by the rotation of the cam.

With this, since a plurality of trays can be given different operations by the rotation of a single cam, it is possible to control a plurality of disks to perform different operations simultaneously with a simple device.

According to a third aspect of the present invention, in addition to the structure of the second aspect, the reproducing mechanism cam is provided with a horizontal portion for keeping the height of the reproducing mechanism constant by rotation, and the height of the reproducing mechanism is increased. The direction defining cam defines the direction of the tray that is not in the reproducing position when the disc placed on one of the trays is reproduced while maintaining the constant height.

This makes it possible to perform an operation such as moving the other tray to the loading / unloading position while the disk on one tray is being played back by the rotation of the single cam, so that the disk can be changed during playback. It is possible to provide a simplified device.

According to the disk loading device of a fourth aspect, in addition to the configurations of the first to third aspects, the cam has a cylindrical shape, and the reproducing mechanism is provided inside the cam.

As a result, since the reproducing mechanism is provided inside the rotating cylindrical cam, the apparatus is further simplified.

[Brief description of drawings]

FIG. 1 is a plan view and a side view showing movement of an upper tray and a lower tray among three positions in a disc loading device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the disc loading device.

FIG. 3 is a view showing a disc loading device mounted on the disc loading device 2;
It is a top view which shows a disc of a kind.

FIG. 4 is a plan view showing a configuration of the upper tray and the lower tray.

FIG. 5 is a perspective view showing configurations of the upper tray, the lower tray, and the composite tray.

FIG. 6 is a plan view showing the internal structure of the disc loading device.

FIG. 7 is a plan view showing an ON / OFF state of a tray position detection switch according to a position of an upper tray in a disc loading device according to an embodiment and another embodiment of the present invention.

FIG. 8 is a plan view showing an ON / OFF state of the tray position detection switch according to the position of the lower tray in the disc loading device according to the embodiment and the other embodiment of the present invention.

FIG. 9 is a perspective view showing an appearance of a reproduction mechanism unit.

FIG. 10 is a perspective view showing the outer appearance of a disk fixing unit.

FIG. 11 is a side view showing a configuration of a main cam and a portion related to the main cam.

FIG. 12 is a perspective view showing an appearance of a main cam.

FIG. 13 is a plan view showing an arrangement position of two pinions when the upper tray is in a storage position.

FIG. 14 is a plan view showing an arrangement position of two pinions when the upper tray moves from the storage position to the attachment / detachment position.

15A and 15B are a plan view and a side view showing an arrangement position of two pinions when the upper tray moves from the storage position to the reproduction position.

16A and 16B are a plan view and a side view showing a state in which the lower tray is held by the lock lever at the storage position, the position immediately before reaching the storage position from the attachment / detachment position, and the storage position T2.

FIG. 17 is a perspective view showing the outer appearance of a disc loading device according to an embodiment of the present invention.

18 is a perspective view showing the outer appearance of a drive unit in the disc loading apparatus of FIG.

19 is a side view showing a configuration of a main cam and a portion related to the main cam in the disc loading device of FIG.

20A and 20B are a plan view and a side view showing the movement of the upper tray and the lower tray among the three positions in the disc loading device of FIG.

FIG. 21 is a development view showing the outer peripheral surface and the inner peripheral surface of the main cam of FIG.

22A and 22B are a plan view and a front view showing the structure of a pinion rotating cam in the main cam of the disc loading device of FIG.

23 is a perspective view showing the configuration of a tray position detection mechanism in the disc loading device of FIG.

24 is an explanatory diagram showing positions of a turntable and a stabilizer in the disc loading device of FIG.

25 is a state transition diagram showing transition of operation states of respective parts corresponding to respective rotational positions of the main cam in the disc loading device of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Housing 1a Holding release rack (holding release means) 2 Upper tray (1st tray) 2i Stop portion 2j Locking portion 3 Lower tray (2nd tray) 3c Partial rack (auxiliary rack) 3d Cutout portion 4 Tray drive mechanism (Tray drive means) 5 Disk fixing mechanism (fixing mechanism) 6/7 Disk 8 Lock lever (holding member) 21/22 Pinion 35 Pinion rotating mechanism (pinion rotating means) 36b / 36c Lock claw 41 Main cam 41a Pinion rotating Cam 41b Playback mechanism Lifting cam 41b2 Horizontal part 41c Fixing mechanism Lifting cam 41c2 Horizontal part 41d Rotation position detection cam (rotational position detection mechanism) 51 Playback mechanism 52a Driven pin 54 Stabilizer 55 Stabilizer holder 55c Guide pin 55d Driven pin 61 Cam rotation mechanism

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hidehito Takeuchi             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Yoshifusa Fujioka             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Masayuki Isobe             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company (72) Inventor Kimihiko Suezawa             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company F term (reference) 5D072 AB17 BE02 BE03 BG02 BH05                       CC05 EB02 EB18

Claims (4)

[Claims] 1. A loading / unloading position for enabling the loading / unloading of a disc outside the housing, a storage position for housing the disc inside the housing, and a playback for playing the disk further inside the housing than the storage position. In a disc loading device for moving the disc back and forth between a position and a position, a tray for moving the disc between the three positions while placing the disc, a driving means for driving the tray, and recording on the disc at the reproducing position. A reproducing mechanism for reproducing the recorded information, a reproducing mechanism elevating cam for elevating and lowering the reproducing mechanism by rotation, and a cam for providing a direction defining cam for changing the moving direction of the tray between the three positions. And the disc loading device. 2. A plurality of the trays are arranged, and a plurality of the direction defining cams are provided so as to correspond to the plurality of trays, respectively. By the rotation of the cams, the direction defining cams cause the corresponding trays to move to other trays. 2. The disc loading device according to claim 1, wherein the disc loading device defines a direction independent of the tray. 3. The reproducing mechanism cam comprises a horizontal portion for keeping the height of the reproducing mechanism constant by rotation, and the disc mounted on one of the trays while keeping the height of the reproducing mechanism constant. 3. The disc loading apparatus according to claim 2, wherein the direction defining cam defines the direction of the tray not in the reproducing position when the disc is being reproduced. 4. The disk loading device according to claim 1, wherein the cam has a cylindrical shape, and the reproducing mechanism is provided inside the cam.