JP3536671B2 - Disc changer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc changer device for selectively reproducing a disc such as a compact disc (CD).

[0002]

2. Description of the Related Art FIG. 11 shows a main part of a conventional disk changer device. In FIG. 11, reference numeral 50 denotes a box-shaped casing, and a disc insertion slot is formed in a front plate 50A of the casing 50. Reference numeral 51 denotes a roller disposed near the disk insertion slot in the housing 50, and the disk 52 inserted from the disk insertion slot is transferred into the housing 50 by the roller 51 driven by a motor, and
0 is placed on the tray. One disk 52 of the disks placed on the plurality of trays is pushed out to the center of the housing 50 by the disk take-out mechanism and fixed to the turntable 53. The turntable 53 is rotatably supported on a bottom plate of a housing 50 by a shaft 54.
5 is rotatably held at the tip. Rotating plate 5
A motor is attached to 5 and the turntable 53 is rotated by the driving force of the motor. The rotary plate 55 is provided with an optical pickup 56, and information recorded on the rotationally driven disk 52 is stored in the optical pickup 56.
Is read in.

[0003]

According to the present invention, it is possible to reduce the size of the disk changer compared with the above-described conventional overlap change disk changer, and to easily detect whether or not there is a disk on each tray. It is an object of the present invention to provide a disk changer device having a simple configuration.

[0004]

According to the present invention, in order to solve the above-mentioned conventional problems , a plurality of trays are stacked in a housing.
The tray holding means for holding the tray
A spiral groove is formed, and the tray is driven by rotation.
Are sequentially moved, and formed between the grooves.
To push out the disk stored in the tray
Ray phase means and the disc extruded by the protruding piece
And a switching means for further driving, wherein the presence or absence of a disk on the tray is detected by the switching means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided a tray holding means for stacking and holding a plurality of trays in a housing, and a spiral groove into which an end of the tray is inserted. A tray transfer means which is formed and driven to rotate by the drive means to sequentially move the tray, a protrusion for pushing out the disk moved to a predetermined position with the rotation of the tray transfer means, and a protrusion pushed out by the protrusion Switching means driven by a disk, wherein the presence or absence of the disk on the tray can be easily detected by utilizing the operation of the tray transfer means.

According to a second aspect of the present invention, there is provided a lever for changing a transfer direction of a disk inserted from a disk insertion port toward a tray, and a disk ejected from the tray with rotation of the tray transfer means. A switching means for detecting whether or not the lever has been driven, and by using a lever for changing the transfer direction of the disk, the presence or absence of the disk on the tray can be easily determined. Can be detected. Less than,
An embodiment of the present invention will be described with reference to FIGS. The disc changer device of the first embodiment described below is an example of a vehicle-mounted disc changer device used by being installed in an automobile.

(Embodiment 1) In FIG. 1 to FIG.
Is a box-shaped housing, and a disk insertion slot is formed in the front plate 1A of the housing 1. Reference numeral 2 denotes a disk loading roller disposed in the housing 1 near the disk insertion slot. The roller 2 is rotated by a roller driving mechanism (not shown) to insert and discharge the disk 3. Reference numeral 4 denotes a semi-circular tray for holding the disk 3, and a plurality of trays 4 are stacked and arranged on the corner side of the back plate 1B and the right side plate 1C in the housing 1. Metal plates 5 are arranged on the uppermost surface and the lowermost surface of the plurality of trays 4, respectively. Holes are formed in the tray 4 and the metal plate 5 at three locations. Since three tray guide shafts whose both ends are fixed to the top plate and the bottom plate of the housing 1 are inserted into the holes of the tray 4 and the metal plate 5, the plurality of trays 4 and the metal plate 5 Is guided up and down by a tray guide shaft. Reference numeral 6 denotes a lever rotatably supported in the housing 1.
Is held. The lever 6 is urged clockwise (FIG. 1) by a spring (not shown). The disk 3 inserted from the disk insertion opening formed at the center of the front plate 1A of the housing 1 is transferred into the housing 1 by the rollers 2 toward the back plate 1B. During this transfer, the roller 7 at the tip of the lever 6 comes into contact with the outer peripheral surface of the disk 3.

FIG. 3 to FIG. 5 show a tray section according to the first embodiment. 3 to 5, reference numeral 8 denotes a coil spring. The lower end of the coil spring 8 is engaged with the metal plate 5 disposed at the lowermost position, and the upper end of the coil spring 8 is engaged with the metal plate 5 disposed at the uppermost position. Has been stopped. This coil spring 8
The plurality of trays 4 are urged and stacked so as to be sandwiched by the metal plates 5 as shown in FIG. 9 is a first cam gear rotatably supported in the housing 1,
As shown in FIG. 8, the first cam gear 9 has a spiral cam groove 9A into which a protruding piece formed at the center of the tray 4 and the metal plate 5 is inserted. The width of a part 9B of the ridge of the first cam gear 9 is formed to be larger than the width of the other ridge 9C. Reference numeral 10 denotes a protruding piece formed integrally with the peak 9B. Similarly, the second and third cam gears 11 and 12 are rotatably supported in the housing 1. Each of the second and third cam gears 11 and 12 has a cam groove into which a protrusion formed at an end of the tray 4 and the metal plate 5 is inserted.
Some of the peaks of the third cam gears 11 and 12 are formed to be thicker than the other peaks. The cam gears 9, 11,
Reference numeral 12 rotates in synchronization with the rotational driving force of a motor (not shown). Further, the second and third cam gears 11, 1
In the vicinity of the second and third cam gears 11, 12, there are fourth and fifth ridges having a width larger than the width of the ridges.
Cam gears 13 and 14 are rotatably supported. When the cam gears 9, 11 and 12 are rotated by the driving mechanism, the legs between the trays 4 are sequentially opened with this rotation, and when the fourth and fifth cam gears 13 and 14 are rotated by the other driving mechanism, the tray 4 is separated. As shown in FIG. 4, the legs are further widened.

In FIG. 1, reference numeral 15 denotes a shaft 1
6 is a substrate rotatably supported by the
An optical head chassis 18 is supported on 5 via three rubber dampers 17. Reference numeral 19 denotes an optical pickup which is moved to the optical head chassis 18 in the direction of arrow A by a feed screw. The optical pickup 19 has a light emitting element,
An optical system such as a light receiving element is incorporated. Reference numeral 20 denotes an objective lens which forms an optical system. The laser beam emitted from the objective lens 20 is applied to the disk 3,
Is reflected by the light-receiving element via the objective lens 20. The light receiving element converts the received laser light into an electric signal and outputs the electric signal. The information recorded on the disk 3 is reproduced from the output signal.

In FIG. 6 and FIG. 7, reference numeral 21 denotes a turntable rotatably held by the optical head chassis 18. The turntable 21 is directly connected to a rotating shaft of a motor 22 mounted on the lower surface of the optical head chassis 18. Have been. Reference numeral 23 denotes a plurality of claws held at the center of the turntable 21 so as to be openable and closable. When the disc 3 is not placed on the turntable 21, the claws 23 are in a closed state.
When the disc is placed on the turntable 21, the pawl 23 is driven outward by the pawl driving mechanism to hold the disc 3 on the turntable 21.

In FIG. 1, reference numeral 24 denotes a disk pushing lever slidably held at the tip of a shaft 25, and the disk pushing lever 24 is rotated clockwise (FIG. 1) by a driving mechanism (not shown). Then, the disk push lever 2
4 enters between the trays 4, and the disc 3 on the tray 4
And pushes out one disk 3 from the tray 4 toward the center in the housing 1. The disc 3 extruded from the tray 4 is held by a disc guide mechanism and transferred to the turntable 21 to be turned.
And is driven to rotate by being clamped by a claw 23.

FIGS. 9A to 9F show that the tray is raised,
The state of the tray by the elevator mechanism to be lowered is shown. As described above, when the motor that operates the elevator mechanism rotates, the rotational driving force of the motor is transmitted to the cam gears 9, 11, and 12 via the gear reduction mechanism, and the cam gear 9,
11 and 12 rotate. By the rotation of the cam gears 9, 11, and 12, the tray 4 becomes (A) → (B) → (C) →
It descends as shown in (D) → (E) → (F). Further, as the tray 4 descends, a part of each tray 4 is sequentially driven downward by the spiral cam grooves of the cam gears 11 and 12, so that the positions where the legs are opened sequentially change as the tray 4 descends. . Note that the broken line in FIG. 9 indicates the position where the disc 3 on the tray 4 is pushed out. Further, since the projection 10 is formed on the peak 9B of the cam gear 9, the projection 10 enters between the trays 4 with the rotation of the cam gear 9, and the projection 1
0 pushes the disk on the tray 4 toward the center of the housing 1.
The disc 3, which has been pushed by the projection 10 and moved toward the center of the housing 1, pushes the roller 7 at the tip of the lever 6 as shown in FIG. 1). In FIG. 10, reference numeral 6A denotes a projecting piece integrally formed on the upper surface of the lever 6;
This is a photocoupler in which a light emitting element and a light receiving element are arranged to face each other across A. When the roller 7 is pushed by the disk 3 pushed toward the center of the housing 1 by the projecting piece 10 of the cam gear 9 and the lever 6 rotates counterclockwise, the projecting piece 6A comes off the photocoupler 27, and the photocoupler 27 Turns off to on. As described above, in the process of lowering the six trays 4 by the tray elevator mechanism, the projecting pieces 10
Are sequentially inserted between the trays, and the presence or absence of the disc 3 on each tray 4 is detected by detecting with the photocoupler 27 whether or not the lever 6 has rotated at the insertion timing.

[0013]

According to the first aspect of the present invention, there is provided a simple configuration utilizing the operation of the tray transfer means.
Thus, the presence or absence of a disc on the tray can be easily detected. According to the second aspect of the present invention, the presence or absence of a disk on the tray can be easily detected by using the lever for changing the direction of transport of the disk.

[Brief description of the drawings]

FIG. 1 is a top view of a disc changer device according to a first embodiment of the present invention.

FIG. 2 is a top view at the time of a reproducing operation according to the first embodiment;

FIG. 3 is a side view of the tray mechanism according to the first embodiment.

FIG. 4 is a side view of a tray mechanism during reproduction according to the first embodiment of the embodiment.

FIG. 5 is a side view of the tray mechanism during reproduction according to the first embodiment;

FIG. 6 is a top view of the optical head chassis according to the first embodiment;

FIG. 7 is a side view of the optical head chassis according to the first embodiment;

FIG. 8 is a side view of the cam gear according to the first embodiment.

FIG. 9 is a diagram illustrating the operation of the tray elevator mechanism according to the first embodiment.

FIG. 10 is a side view of the lever according to the first embodiment.

FIG. 11 is a top view showing an outline of a conventional disc changer device.

[Explanation of symbols]

3 disks 4 trays 6 lever 6A projection 9 cam gear 10 prongs 11 Cam gear 12 cam gear 13 Cam gear 14 cam gear 15 Substrate 16 axes 17 Damper 18 Optical head chassis 19 Optical pickup 21 Turntable 22 motor 24 Disc push lever 27 Photocoupler

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Doi 2-45, Hikosancho, Kanazawa-shi, Ishikawa Pref. Matsushita Communication Kanazawa Research Laboratories (56) References JP-A-10-106113 JP-A 8-249779 (JP, A) JP-A 8-96479 (JP, A) JP-A 63-214963 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 17/26

Claims (2)

(57) [Claims] And 1. A tray holding means for holding a stack a plurality of trays in the enclosure, together with the sequentially moving the front Symbol tray by spiral grooves to form rotary drive end of the tray is inserted, The projecting piece formed between these grooves
And extruding tray phase means the disc to more housed in the tray, driven by extruded disc by pre Symbol protrusion
A disc changer device comprising: 2. A has a lever for changing the transport direction of the inserted disc from the disc insertion opening in the tray direction, whether before Symbol lever is driven by the tray transferring means rotates in with extruded disk from the tray of 2. The disc changer device according to claim 1, further comprising switching means for detecting the change.