JP2003059151A - Optical disc playback device - Google Patents

Abstract

(57) [Problem] To simplify the structure of a disk guide for transporting a disk in cooperation with a feed roller without using a motor having a large output to rotate a feed plate, Reduce costs. SOLUTION: A tension coil spring 1 for rotatingly urging a feed plate 12 is rotated by a rotation shaft 1 of the feed plate 12 in a load direction.
One end is supported by a locking piece 2 provided on the front end side of the feed plate 12, and the other end is supported by a locking piece 3 provided on the bottom surface of the lower chassis 10 so as to pass near the lower portion of 3. Thus, when the feed plate 12 is rotated in a direction away from the disc guide, the feed plate 12 can be rotated with a small force. Also, place a disc guide on the back of the upper chassis.
By integrally forming the protrusions of the book, the number of parts and the number of mounting operations can be reduced as compared with the conventional example using a resin disk guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing apparatus, and more particularly to a vehicle-mounted optical disk reproducing apparatus.

[0002]

2. Description of the Related Art FIG. 4 (a) is a schematic plan view showing a lower chassis and suspension chassis assembly of a conventional vehicle-mounted optical disk device, and FIG. 4 (b) is a schematic side view of the lower chassis assembly. The right side of FIG. 4A is the front part of the device for inserting and ejecting the disc, the left side is the rear part of the device, the upper side is the right side part of the device, and the lower side is the left side part of the device. This on-vehicle optical disk device supports a suspension chassis equipped with a disk reproducing mechanism in a floating state by an oil damper and a coil spring with respect to a lower chassis so that vibrations from the vehicle body are not transmitted to the optical pickup while the device is in use. It is like this. In FIG. 4, the lower chassis 10
A disk transport mechanism 11 is arranged in the front part of the.
The disk transport mechanism 11 includes a feed plate 12 made of sheet metal, and a rotation support shaft 13 provided at the center of both sides of the feed plate 12 so as to project outward is rotatably supported by the lower chassis 10. Feed rollers 14 are rotatably provided at the rear ends of both sides of the feed plate 12. The feed plate 12 is rotationally biased in a clockwise direction by a torsion coil spring 15 provided around the rotation support shaft 13 thereof, and in a normal state, as shown in the front view of FIG. Disc guide 3 attached to the bottom
The disc D inserted from the disc insertion opening 32 is conveyed in the vicinity of 1 so as to be sandwiched between the feed roller 14 and the disc guide 31.

The suspension chassis 20 includes a damper mechanism 21, 22, 23 composed of an oil damper and a coil spring.
Thus, the lower chassis 10 is supported at three points. A turntable mechanism and an optical pickup mechanism are attached to the opening 24 of the suspension chassis 20, and a clamp arm of a disc clamp mechanism that pushes the disc against the turntable is rotated via a suspension lock mechanism 25 provided on the left inner surface. It is movably attached.

In FIG. 4, the suspension lock mechanism 25 is a suspension lock member 2 provided on the left side surface of the suspension chassis 20 so as to be slidable in the front-rear direction.
6, the suspension lock member 26 includes a rack 27 capable of meshing with a pinion 28 provided on the side surface of the suspension chassis 20, and a cam surface 29 is formed on the lower surface of the front end portion of the suspension lock member 26. It is locked to the rotating shaft from above. Therefore, the rack 27
And the suspension lock member 2 by the pinion 28
When 6 moves forward, the feed roller 14 is pushed down by the cam surface 29, and the feed plate 12 rotates in the counterclockwise direction about the rotation support shaft 13, so that the feed roller 14 separates from the disc guide 31, and As shown in FIG. 5, the state is held by the bottom surface of the cam surface 29, the suspension chassis 20 is held in a floating state, and the disc is reproduced.

[0005]

However, in the above-described conventional vehicle-mounted optical disk reproducing apparatus, as shown in FIG. 4, the feed plate 12 is rotationally biased by the torsion coil spring 15, and the suspension lock member 26 is provided. When moving forward by the rack 27 and the pinion 28, the torsion coil spring 15 is gradually wound when it is pushed down by the cam surface 29 and shifts to the state of FIG. 5, so that the rack 27 is moved through the pinion 28. There has been a problem that a large load is applied to a driving motor, a motor having a large outer diameter and a large output has to be used.

Further, in the above-mentioned conventional on-vehicle optical disk reproducing apparatus, since the resin-made disk guide for conveying the disk in cooperation with the feed roller is attached to the upper chassis, the apparatus is formed by the thickness thereof. However, not only is it difficult to reduce the thickness of the device, but also the cost is increased due to an increase in the number of parts and man-hours for mounting.

The present invention solves such a conventional problem, and an object of the present invention is to provide a low-load and thin optical disk reproducing apparatus capable of cost reduction.

[0008]

In order to achieve the above object, an optical disk reproducing apparatus of the present invention comprises a feed roller for conveying an optical disk in cooperation with a disk guide provided on an upper chassis, and both ends of the feed roller. A feed plate for rotatably supporting the portion, a lower chassis for rotatably supporting the feed plate in a direction of coming in contact with and separating from the disc guide, a drive means for rotating the feed plate, and the feed plate for the feed plate. A tension coil spring for urging a rotation in a direction approaching the disc guide, and one end of the tension coil spring is arranged so that a load direction passes near a lower portion of a rotation support shaft of the feed plate. Is supported on the front end side and the other end is supported on the lower chassis. With this configuration, when the feed plate is rotated toward and away from the disc guide, since the load direction of the tension coil spring is close to the rotation support shaft of the feed plate, it can be moved with a small force. Since the load on the motor can be reduced, it is possible to use a motor with a small output, and it is possible to realize a thin optical disk reproducing device with low cost and low load.

Further, the optical disk reproducing apparatus of the present invention comprises a disk guide provided on the upper chassis, and a feed roller rotatably provided on the lower chassis and carrying an optical disk in cooperation with the disk guide.
The disk guide is formed integrally with the upper chassis. With this configuration, it is possible to reduce the number of parts and the number of mounting work steps, and it is possible to further reduce the cost.

Further, in the optical disc reproducing apparatus of the present invention, the disc guide has a plurality of protrusions projecting in a mountain shape in parallel to the feed roller side, and each of the protrusions extends from the central portion toward both sides. It is characterized in that it is formed in a tapered shape so as to approach the feed roller. With this configuration, even if the disc guide is integrally formed with the sheet metal feed plate, each protrusion hits the disc at only two points on the left and right sides, so that the disc can be smoothly transported without being damaged.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a schematic plan view showing a lower chassis and a suspension chassis assembly of an in-vehicle optical disk reproducing device according to an embodiment of the present invention,
FIG. 1B is a schematic side view of the lower chassis assembly. 4 is different from the conventional example shown in FIG. 4 only in the spring for biasing the feed plate to rotate and the disk guide provided on the upper chassis. Therefore, other members are used in the description of the conventional example. Reference numerals are used for similar members. In FIG. 1, a disc transport mechanism 11 is arranged at the front of the lower chassis 10. The disc transport mechanism 11 includes a feed plate 12 made of sheet metal, and the feed plate 1
Rotating spindle 1 provided at the center of both sides of 2 to project outward
3 is rotatably supported by the lower chassis 10.
The feed rollers 14 are provided at the rear ends of both sides of the feed plate 12.
Is rotatably provided. The feed plate 12 is urged to rotate clockwise by two tension coil springs 1 provided on the left and right. Each of the tension coil springs 1 has one end supported by a locking piece 2 provided on the rear surface of the feed plate 12 on the front end side so that the direction of the load passes near the lower portion of the rotation support shaft 13 of the feed plate 12, and the other end. The portion is supported by a locking piece 3 provided on the bottom surface of the lower chassis 10.

FIG. 3A is a partial plan view of the upper chassis of the optical disk reproducing apparatus, and FIG. 3B is a front view thereof.
FIG. 3C is a sectional view of the left side surface thereof, showing a state in which FIG. 1 is rotated 90 degrees. Sheet metal upper chassis 4
Is the same shape as the disc guide on the back side of its front end.
Book ridges 5, 6, 7 are formed. 3 ridges 5,
Reference numerals 6 and 7 are formed so as to project in a mountain shape on the feed roller 14 side and to be parallel to the feed roller 14, and are formed in a tapered shape so as to be higher from the central portion toward both sides. .

In FIG. 1, a suspension chassis 2
0 is a damper mechanism 2 including an oil damper and a coil spring
The lower chassis 10 is supported by 1, 22, and 23 at three points. Opening 24 of suspension chassis 20
A turntable mechanism and an optical pickup mechanism are attached to the disk, and a clamp arm of a disk clamp mechanism that presses the disk against the turntable is rotatably attached via a suspension lock mechanism 25 provided on one inner surface. There is.

Next, the operation of the optical disk reproducing apparatus according to this embodiment will be described. When the user inserts the disc into the apparatus through the disc insertion opening, the disc conveying motor 16 is rotated by the signal from the photo sensor that detects the insertion of the disc, and the feed roller 14 is rotated. Four
The three taper-shaped projections 5, 6, and 7 serving as the disk guides formed on the disk are drawn into the apparatus while being centered in the central portion. When the disc is pulled into the apparatus, the suspension lock mechanism 25 operates by the rear end of the disc, the suspension lock member 26 provided on one side surface of the suspension chassis 20 slides forward, and the rack 27 thereof is By engaging with the pinion 28, the rack 27 slides in the forward direction by the pinion 28 driven by the disc transport motor 16, and the feed roller 14 is pushed down by the cam surface 29 formed on the lower surface of the front end portion of the rack 27. 12 rotates counterclockwise around the rotation support shaft 13. This allows
The feed roller 14 is separated from the upper chassis 4,
As shown in, the state is held by the bottom surface of the cam surface 29, and the suspension chassis 20 is held in a floating state. At the same time, the clamp arm descends, the disc clamp positions the disc on the turntable, and the disc is reproduced by the optical pickup mechanism.

When the eject button is pressed after the reproduction of the disk is completed, the disk carrying motor 16 is rotated in the reverse direction, and the reverse operation is performed. First, the clamp arm rises and the disc clamp separates from the disc, the pinion 28 slides backward on the rack 27 and the suspension lock member 26, and the cam plate 29 raises the feed plate 12 to move the feed roller 14 to the disc. Eject it to the position where it makes contact and the disc can be grasped from the outside.

As described above, according to the present embodiment, the tension coil spring 1 that urges the feed plate 12 to rotate is urged so that the load direction passes near the lower portion of the rotation support shaft 13 of the feed plate 12. Since one end is supported by the locking piece 2 provided on the front end side of the feed plate 12, and the other end is supported by the locking piece 3 provided on the bottom surface of the lower chassis 10, the feed plate 12 is separated from the disc guide. It is possible to use a motor with a small output because the motor can be rotated with a small force when it is rotated in the rotating direction.

Further, since the disk guides for transporting the disks in cooperation with the feed rollers 14 are formed on the back surface of the upper chassis 4 as three protrusions 5, 6, and 7, the conventional disk guides made of resin are used. The number of parts and man-hours for mounting can be reduced as compared with the example.

[0018]

As described above, the optical disc reproducing apparatus of the present invention cooperates with the disc guide provided on the upper chassis to support the feed roller that conveys the optical disc, and rotatably supports both ends of the feed roller. Feed plate, a lower chassis that rotatably supports the feed plate in a direction in which the feed plate moves toward and away from the disc guide, drive means that rotates the feed plate, and a rotation mechanism that rotates the feed plate in a direction that approaches the disc guide. A tension coil spring for urging the tension coil spring, one end of which is supported on the front end side of the feed plate and the other end of which is lower chassis so that the direction of the load passes near the lower part of the rotation support shaft of the feed plate. Since it is supported on the side, when the feed plate is rotated in the direction away from the disc guide, the load direction of the tension coil spring approaches the rotation support shaft of the feed plate. And for that, it is possible to rotate a small force, it is possible to reduce the load on the motor, it is possible to use a small motor output, it is possible to reduce the cost.

Further, the optical disk reproducing apparatus of the present invention comprises a disk guide provided on the upper chassis and a feed roller rotatably provided on the lower chassis and carrying the optical disk in cooperation with the disk guide. Since the guide is formed integrally with the upper chassis, the device can be made thin, the number of parts and the number of man-hours for mounting work can be reduced, and the cost can be reduced.

[Brief description of drawings]

1A is a schematic plan view showing a lower chassis and a suspension chassis assembly of an optical disk reproducing apparatus according to an embodiment of the present invention, in a state where a feed roller is located at a disk transport position, and FIG. 1B is an embodiment of the present invention. FIG. 3 is a schematic side view showing the lower chassis assembly of the optical disc reproducing apparatus in FIG.

FIG. 2 (a) is a schematic plan view of the feed roller according to the embodiment of the present invention in a disc separation position. FIG. 2 (b) is a schematic plan view of the feed roller according to the embodiment of the present invention in a disc separation position. Side view

3A is a partial plan view of an upper chassis according to an embodiment of the present invention, FIG. 3B is a front view of an upper chassis according to an embodiment of the present invention, and FIG. 3C is a left side view of an upper chassis according to an embodiment of the present invention. Figure

FIG. 4A is a schematic plan view showing a lower chassis and a suspension chassis assembly of an optical disc reproducing apparatus in a conventional example, and a state in which a feed roller is located at a disc transport position. FIG. 4B is a lower chassis assembly of the optical disc reproducing apparatus in a conventional example. FIG. 6 is a schematic side view showing a state where the feed roller is located at the disc transport position.

FIG. 5A is a schematic plan view of a conventional feed roller located at a disc separation position. FIG. 5B is a schematic side view of a conventional feed roller located at a disc separation position.

FIG. 6 is a schematic front view of an upper chassis in a conventional example.

[Explanation of symbols]

1 tension coil spring A few locking protrusions 4 upper chassis Protrusions that serve as 5, 6, and 7 disk guide 10 lower chassis 11 Disc transport mechanism 12 Feed plate 13 rotation spindle 14 Feed roller 15 torsion coil spring 16 disk transport motor 20 suspension chassis 21, 22, 23 Damper mechanism 24 opening 25 Suspension lock mechanism 26 Suspension lock member 27 racks 28 Pinion 29 Cam surface 30 upper chassis 31 disk guide 32 Disc insertion slot

Claims (3)

[Claims] 1. A feed roller that conveys an optical disc in cooperation with a disc guide provided on an upper chassis, a feed plate that rotatably supports both ends of the feed roller, and the feed plate as the disc guide. A lower chassis that rotatably supports the feed plate in a direction toward and away from the drive plate; drive means that rotates the feed plate; and a tension coil spring that urges the feed plate to rotate in a direction approaching the disc guide. The tension coil spring,
The one end is supported on the front end side of the feed plate so that the direction of the load passes near the lower part of the rotation support shaft of the feed plate,
An optical disk reproducing device, wherein the other end is supported on the lower chassis side. 2. A disc guide provided on the upper chassis, and a feed roller rotatably provided on the lower chassis to convey an optical disc in cooperation with the disc guide. The disc guide is provided on the upper chassis. An optical disk reproducing device characterized by being integrally formed. 3. The disc guide has a plurality of protrusions projecting in a mountain shape in parallel to the feed roller side, and each of the protrusions is tapered so as to approach the feed roller from the central portion toward both sides. 3. The optical disk reproducing apparatus according to claim 2, wherein the optical disk reproducing apparatus is formed in.