JPH0765485A - Changer type disk reproducing device - Google Patents

Abstract

PURPOSE:To particularly miniaturize a changer type disk reproducing device capable of selectively reproducing plural disks to such an extent that the device can be fitted to a dashboard of an automobile. CONSTITUTION:The device is composed of carriages 1-6 rotatably mounting disks, a stocker 50 for supporting these carriages movably in the forward and backward direction of the device, an optical head 30, an up-and-down mechanism 51 for moving vertically the stocker 50 and a moving mechanism 7 for moving a selected carriage in the forward and backward direction of the device. Then, the selected carriage 1 is moved to the rear of the device in response to a reproducing operation, and is brought into a reproducing starting position, and then the carriage 1 is gradually moved to the front of the device in accordance with reproducing the disk, so that a light beam is made to follow-up an information track.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a changer type disk reproducing apparatus capable of selectively reproducing a plurality of disks, and more particularly to a changer type disk reproducing apparatus which can be miniaturized so that it can be mounted on a dashboard of an automobile. The present invention relates to a disc reproducing device.

[0002]

2. Description of the Related Art At present, many automobiles are provided with an audio equipment mounting opening of a size (width 182 mm, height 53 mm) standardized by DIN (ISO7736) in the dashboard. The CD) changer has a large outer shape and is arranged in the trunk room. Therefore, there is a strong demand for a so-called in-dash type CD changer that is inconvenient for disc replacement and can be attached to the opening of the dash board.

In order to miniaturize the CD changer, in addition to the positional relationship between the disc at the reproducing position and the disc at the standby position, the arrangement position of the optical mechanism is an important point. JP-A-2-
Japanese Patent No. 143942 discloses that the disc at the reproducing position and the disc at the standby position are overlapped in a diagonal direction of the device, and Japanese Patent Laid-Open No. 3-201259 discloses that the disc at the reproducing position and the disc at the standby position are overlapped in the front-back direction of the device. -It discloses to wrap. Further, the apparatus described in any of the publications is configured so that the optical head moves in a direction inclined with respect to the side surface of the apparatus, as described in detail in Japanese Patent Publication No. 2-6151 and Japanese Patent Publication No. 4-62157. There is.

[0004]

However, the mechanism still occupies a large part in any of the devices, and it is impossible to increase the number of disks to be stored in order to obtain the space of the circuit board, and the depth dimension of the device. There was a problem that became longer.

[0005]

The apparatus of the present invention provides a changer type disk reproducing apparatus which is most suitable for further miniaturization, and comprises a stocker means capable of coaxially accommodating a plurality of disks and an optical beam. An optical head for reading information recorded on a disc and a stocker means are moved relative to the optical head to select one reproduction disc from a plurality of discs, and a reproduction disc in the stocker. By moving from the storage position to the playback position, and by moving the playback disc when playing the disc,
This is achieved by a disc moving means for moving the position of the optical beam with respect to the reproducing disc in the disc radial direction.

[0006]

According to the above-mentioned apparatus of the present invention, the disc moving means moves the reproduction disc from the storage position in the stocker to the reproduction position, and gradually moves the reproduction disc as the disc is reproduced, and the optical disc for the reproduction disc is moved. -Move the position of the frame in the radial direction of the disc.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the device of the present invention will be described below with reference to the drawings. The apparatus of this embodiment constitutes an in-dash CD changer capable of continuously reproducing six compact discs (CDs), and its housing is DIN.
The width W is 180 so that it can be attached to the audio equipment mounting opening in the dashboard standardized by (ISO7736).
mm, height T is 50 mm, and the rear part 165 mm is inserted and fixed in the opening except the front panel part 40 having a thickness of 15 mm.

1 and 5, the first carriage 1 housed in the uppermost stage of the stocker is at the reproduction start position (the position where the optical axis 31 of the optical head 30 coincides with the innermost circumference 20 of the disc).
2 and 7 show the top and side surfaces of the device when it is brought to the
Shows the upper and side surfaces of the apparatus when the carriage 1 is brought to the reproduction end position (the position where the optical axis 31 of the optical head 30 coincides with the outermost circumference 21 of the disc). 3 and 8 show the upper and side surfaces of the apparatus when stopped, and FIGS. 4 and 9 show the upper and side surfaces of the apparatus when the carriage 1 is brought to the eject position where the disk can be attached and detached.
Further, FIG. 6 shows a side surface of the apparatus when the No. 6 carriage 6 stored in the lowermost stage of the stocker is brought to the reproduction start position.

As shown in FIGS. 1 and 5, a stocker 50 is arranged on the front side of the apparatus so as to be movable in the vertical direction of the apparatus, and six carriages 1 to 6 are provided so as to be movable in the longitudinal direction of the apparatus. . The carriages 1 to 6 respectively support a turntable 100 (FIG. 10), and disks 10 to 15 are press-fitted and fixed onto each turntable. The stocker 50 moves up and down at six positions by driving the vertical drive mechanism 51 in order to select one carriage driven by the carriage moving mechanism 7. FIG. 5 shows the stocker position when the uppermost No. 1 carriage 1 is selected, and FIG. 6 shows the stocker height position when the lowermost No. 6 carriage 6 is selected. The selected carriage is driven by the carriage moving mechanism 7 and moves between the eject position (FIG. 4) and the reproduction start position (FIG. 1) where the disc can be attached / detached.

On the other hand, on the rear side of the apparatus, the optical head 30 is fixed at a position close to the disk housed in the stocker 50 via a damper (not shown). The optical axis 31 of the optical head 30 is directed on a center line 80 extending in the carriage movement direction passing through the center of the disk so that the track direction of the optical beam projected on the detector does not change depending on the access position. .

Further, four rollers 60 to 60 are provided on the rear side of the apparatus.
63 is arranged so as to sandwich the optical head 30 from the lateral direction of the apparatus. As will be described later, when the disc is reproduced, the rollers 60 and 61 engage with the disc upper surface (level surface), and the rotation shafts 70 and 71 of the rollers 60 and 61 coincide with the center point C1 of the disc upper surface. Reference numerals 62 and 63 engage with the lower surface of the disk (information reading surface), and rotation axes 72 and 73 coincide with the center point C2 (FIG. 10) of the lower surface of the disk. By thus directing the roller rotation axis to the center point of the disk, the roller rotates without rubbing against the disk and does not damage the level coating or the protective layer on the upper surface of the disk. Further, one roller 62 that engages with the information reading surface (lower surface)
Is connected to a rotation drive mechanism 90, and smoothly drives the disk without affecting the unevenness of the level coating.

Further, the rollers 60 and 61 on the upper surface of the disk are arranged at symmetrical positions with respect to the center line 80 so that the arrangement angle of the rotating shafts 70 and 71 when viewed from the upper surface of the device is 90 degrees. Further, these rollers are supported so as to move slightly up and down, and are biased in the disc pressing direction by a spring (not shown). On the other hand, the rollers 62, 6 on the bottom surface of the disk
3 is such that the arrangement angle of the rotating shafts 72 and 73 is 80 degrees,
It is arranged symmetrically with respect to the center line 80, and is supported at substantially the same height as the lower surface of the disk without vertically moving. By arranging the rollers on the lower surface of the disk slightly inward of the rollers on the upper surface, the disk contact points of the rollers 60 and 61 are more than the line connecting the disk contact points of the rollers 62 and 63. Located on the center side, the rollers 60 and 61 can urge the turntable 100 without bending the disk by its urging force. Further, these rollers 60 to 63 are effective in causing surface wobbling and resonance of the disk in a fan-shaped range formed by lines 70 and 71 connecting the disk center point and the disk engagement points of the rollers 60 and 61. As a result, the focus servo signal to the optical head 30 is reduced, and the sound quality is improved.

Further, the above-mentioned rollers 60 to 63 are guided with respect to the main body of the apparatus so as to move integrally in the front-rear direction of the apparatus, and as shown in FIGS. While moving between the reproduction start position and the reproduction end position, moves with the carriage to maintain the above-mentioned positional relationship. When the carriage deviates from the above section, the rollers 60 to 63 are held at the same positions as those at the reproduction end position as shown in FIGS.

Details of the roller 62 described above are shown in the cross-sectional view of FIG. The other rollers 60, 61,
63 also has the same structure as the roller 62. On the left side surface of the rubber roller 620, a fitting convex portion that also functions as a rotation stopper is formed, and the pulley 621 is fitted into this convex portion. The roller 62 serving as a driving roller has a belt hung between the pulley 621 and the driving source 90. On the other hand, the lock portion 623 is inserted from the right side of the rubber roller 620 so as to compress the elastic material 622, and the lock portion 623 has three hooks 6 projectingly formed on the left side surface at intervals of 120 degrees.
24 (only one hook 624 can be seen due to the sectional view) is fitted into the pulley 621 and fixed to the pulley 621. A relatively hard ring 625 is fitted to the edge of the rubber roller 620 to prevent the rubber roller 620 from being deformed by rotation.

Hereinafter, an operation example of the above-described embodiment apparatus will be described. As shown in FIGS. 3 and 8, when an eject key (not shown) is operated in a stopped state where the carriage 1 is selected, the carriage 1 moves toward the front of the apparatus and is shown in FIGS. It is brought to the eject position. At this eject position, the carriage 1
The upper disc can be attached and detached. In this eject state, a disc select key (not shown) for selecting a disc on another carriage, for example, a disc 6 key.
When is operated, the carriage 1 is returned to the storage position in the stocker 50, and during this loading operation, the presence or absence of a disk on the carriage is detected by an optical sensor (not shown) and stored. Subsequently, the stocker 50 is brought to the position for selecting the carriage 6, the selected carriage 6 is brought to the eject position, and the disk presence / absence data on the carriage 6 is cleared.

On the other hand, when the reproduction key is operated in the stopped state shown in FIGS. 3 and 8, the carriage 1 starts moving toward the rear of the apparatus. When the disc 10 is engaged with the roller 62 by the movement of the carriage 1, the disc 10 starts rotating in the counterclockwise direction, and when the disc rotates, the other driven rolls are started.
The rollers 60, 61, 63 also start rotating at substantially the same time. In addition,
The roller 62 is controlled to rotate at a predetermined rotation speed except when the disc is reproduced. Therefore, the disk 10 is the carriage 1
It is inserted between the rollers while rotating in the counterclockwise direction. Then, when the carriage 1 moves to the reproduction end position shown in FIG. 2, the rotation axis of each roller coincides with the disk center point as described above. After that, the rollers 60-6
In order to maintain this positional relationship, 3 moves toward the rear of the apparatus together with the carriage 1 and is brought to the reproduction start position shown in FIG.

When it is detected that the carriage 1 has been brought to the reproduction start position, servo control such as focus servo and tracking servo required for disk reproduction is started. A feeder error signal is supplied to a drive motor (not shown) of the carriage moving mechanism 7, and the carriage 1 gradually moves toward the front of the apparatus along with the rollers 60 to 63 in accordance with the disk reproduction, and the optical signal is transmitted. -Make Mumu the information track. Further, a CLV servo signal is supplied to the drive source 90, and the rotation speed of the roller 62 is controlled so that the disk linear velocity at the optical beam reading point is always constant.

When the disk reproduction is completed or the stop key is operated, the servo control is stopped and the drive roller 62 is returned to the predetermined rotation speed again. The carriage 1 is a roller 60-
It moves to the reproduction end position shown in FIG. 2 together with 63, and thereafter only the carriage 1 moves to the storage position shown in FIG. Subsequently, the continuous reproduction operation of the disks placed below the carriage 2 is performed. When it is confirmed that the disc is placed on the carriage 2 based on the disc presence / absence data stored in the memory, the stocker 50 moves to a position for selecting the carriage 2, and the same procedure as described above is performed. Disc playback starts.

On the other hand, when the reproduction key is operated in the eject state shown in FIGS. 4 and 9, the carriage 1
Moves toward the rear of the apparatus, and when it is detected that there is a disc, the disc exceeds the storage position in the stocker, and disc reproduction is started in the same manner as described above. On the other hand, if the disc is not detected, the carriage 1 stops when brought to the storage position, and thereafter, the carriage on which the disc is placed is selected based on the disc presence information, and the disc reproduction on the selected carriage is performed. Is started.

It should be noted that the present invention is not limited to the apparatus of the above-described embodiment, and various aspects can be obtained.
For example, the stocker 50 may be fixedly arranged, and the loading mechanism 7, the optical head 30, and the rollers 60 to 63 may be integrally moved up and down to select the carriage. In this case, the stocker can be easily attached to and detached from the apparatus like a magazine type CD changer. Further, the driving roller or the belt may be brought into contact with the outer circumference of the disk to rotate the disk.

[0021]

As described above, according to the apparatus of the present invention, the mechanism for moving the optical head in the disk radial direction is not required, so that the apparatus can be further downsized.

[Brief description of drawings]

FIG. 1 is a top view of the apparatus when a carriage 1 is brought to a reproduction start position.

FIG. 2 is a top view of the apparatus when the carriage 1 is brought to a reproduction end position.

FIG. 3 is a top view of the apparatus when the carriage 1 is brought to a storage position.

FIG. 4 is a top view of the apparatus when the carriage 1 is brought to the eject position.

FIG. 5 is a side view of the apparatus when the carriage 1 is brought to the reproduction start position.

FIG. 6 is a side view of the apparatus when the carriage 6 is brought to the reproduction start position.

FIG. 7 is a side view of the apparatus when the carriage 1 is brought to the reproduction end position.

FIG. 8 is a side view of the apparatus when the carriage 1 is brought to the storage position.

FIG. 9 is a side view of the apparatus when the carriage 1 is brought to the eject position.

10 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 1st Carriage 2 2nd Carriage 3 3rd Carriage 4 4th Carriage 5 5th Carriage 6 6th Carriage 7 Carriage Moving Mechanism 10 Disc 11 Disc 12 Disc 13 Disc 14 Disc 15 Disc 30 Optical Head 50 Stocker 51 Vertical Drive Mechanism 60 Driven roller 61 Driven roller 62 Driven roller 63 Driven roller 90 Rotational drive mechanism 100 Turntable

Claims (9)

[Claims] 1. A stocker means capable of accommodating a plurality of disks coaxially, an optical head for reading information recorded on the disks by an optical beam, and a relative movement of the stocker means with respect to the optical head. Disc selecting means for selecting one reproduction disc from the plurality of discs, and moving the reproduction disc from the storage position in the stocker to the reproduction position, and moving the reproduction disc when reproducing the disc. Accordingly, the changer type disc reproducing apparatus is provided with a disc moving means for moving the position of the optical beam with respect to the reproducing disc in the disc radial direction. 2. A changer type disk reproducing apparatus according to claim 1, wherein said plurality of disks are rotatably supported by a plurality of carriages movably supported by said stocker means, respectively. 3. A rotary drive means is provided for engaging the playback disk when the playback disk is moved to the playback position and driving the playback disk to rotate. When the disk is played back, the disk moving means includes the rotation driving means. 3. The changer type disc reproducing apparatus according to claim 2, wherein the changer type disc reproducing device is moved together with the reproducing disc. 4. The optical head is disposed in the vicinity of a disc in the stocker, and the center of the disc in the stocker and the center of the reproducing disc are overlapped with each other. Changer type disc player. 5. The changer according to claim 1, wherein the disc moving means moves the reproducing disc between the storage position and the eject position where the disc can be attached / detached in response to an eject instruction. -Type disc player. 6. A plurality of carriages for rotatably supporting the discs, a stocker means for accommodating the plurality of carriages so that the discs supported by the plurality of carriages are coaxial, and an optical beer. An optical head for reading information recorded on the disc by a recording medium, a carriage selecting means for moving the stocker means relative to the optical head, and selecting one carriage among the plurality of carriages, By moving the selected carriage from the storage position in the stocker to the reproducing position, and by moving the selected carriage during disk reproduction, the position of the optical beam with respect to the reproducing disk is moved in the disk radial direction. A changer-type disk reproducing device, comprising: 7. A rotation driving means for engaging the disc on the selected carriage by the movement of the selected carriage to a reproduction position and rotating the disc.
7. The changer type disk reproducing apparatus according to claim 6, wherein when the disk is reproduced, the rotation driving means is moved together with the selected carriage when the disk movement is constant. 8. The optical head according to claim 7, wherein the optical head is arranged close to the disc in the stocker, and the center of the disc in the stocker and the center of the reproducing disc are overlapped. Changer type disc player. 9. The carriage moving means, in response to an eject instruction, moves the selected carriage between the storage position and an eject position at which a disc can be attached and detached. Changer
Type disc player.