JP3884984B2 - Disc loading mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk loading mechanism that holds the outer periphery of a disk and transfers the disk onto a turntable.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an optical disc player such as a CD or DVD, a disc loading mechanism is known as a transport mechanism until the disc is mounted on a turntable that rotates the disc.
[0003]
This type is generally provided with a conveyance roller and a disk is conveyed by this conveyance roller.
[0004]
[Problems to be solved by the invention]
However, in the type in which the disk is transported using the transport roller, the transport roller comes into contact with the disk recording surface, which may damage the disk surface.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disc loading mechanism that can solve the above-described problems of the prior art and can transport a disc without damaging the disc surface.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a disk loading mechanism for moving a disk to a turntable while holding the outer periphery of the disk, a stage unit that moves along the chassis, and a disk that is installed and inserted in the stage unit . A pair of disk holders that move in parallel with each other according to the size and hold the outer periphery of the disk, a means for moving the stage unit to reach the position of the turntable with the disk held by the pair of disk holders, In order to transfer the disk that has reached the table position to the turntable, the stage unit or means for moving the turntable and the holding of the disk by the pair of disk holders are released when the transfer of the disk to the turntable is completed And a means for performing.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the pair of disk holders move in parallel according to the size of the disk inserted between the disk holders.
[0008]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the pair of disk holders each include a pair of pins that hold the outer periphery of the disk at a predetermined interval.
[0009]
According to a fourth aspect of the present invention, in the apparatus according to any one of the first to third aspects, when the disc is ejected, the disc held between the pair of disc holders is placed further on the inlet side than the position. Ejecting means for extruding is provided.
[0010]
According to a fifth aspect of the present invention, there is provided the mechanism according to the fourth aspect, further comprising a mechanism for interlocking the ejecting means and the means for moving the stage unit.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0012]
In FIG. 1, reference numeral 1 denotes a chassis. The chassis 1 is formed by bending a plate into a substantially U shape, and includes a top surface portion 1A and a pair of side surface portions 1B. A slide plate 10 that moves along each side surface portion 1B is installed on each side surface portion 1B of the chassis 1, and a stage unit 2 is suspended between the slide plates 10 so as to freely float and sink. A pair of disk holders 3L and 3R are installed to be movable in parallel with each other.
[0013]
That is, one end of the pair of disk holders 3L and 3R is connected by the spring 4, and the other end is connected by the pinion 5 and the racks 6 and 7. The pinion 5 is rotatably connected to the stage unit 2, and the racks 6 and 7 are formed integrally with the other ends of the disk holders 3L and 3R, respectively.
[0014]
In FIG. 2 to FIG. 9 described below, the mechanism of the pinion 5 and the racks 6 and 7 is omitted for convenience of explanation.
[0015]
Two pins 8 for holding discs D1 and D2 having different sizes are fixed to the pair of disc holders 3L and 3R, respectively.
[0016]
For example, as shown in FIG. 2, when an 8 cm disc D1 is inserted, first, this 8 cm disc D1 hits the pin 8 on the entrance side of the disc holders 3L and 3R, and pushes this pin 8 further. When the centimeter disk D1 is inserted, the pair of disk holders 3L and 3R are kept parallel by the spring 4, the pinion 5 and the racks 6 and 7, while being spaced apart from each other to increase the distance between them. accept. After being received here, the 8 cm disc D1 is held by four pins 8 on the outer periphery. On the other hand, when the 12-centimeter disc D2 is inserted, as shown in FIG. 3, the distance between the disc holders 3L and 3R is further increased compared to the case of the 8-centimeter disc D1.
[0017]
The pair of slide plates 10 that support the above-described stage unit 2 are moved along the chassis 1 for each stage unit 2 as shown in FIG. 4 by an actuator (not shown) such as a motor.
[0018]
That is, the stage unit 2 is moved from the entrance side to the back side so that the disk held by the pair of disk holders 3 reaches the position of the turntable 9 fixed to the approximate center of the chassis 1. The turntable 9 has a spindle that rotates the disk.
[0019]
A spring 20 is stretched between an end portion on the entrance side of the chassis 1 and an end portion on the back side of the stage unit 2, and the stage unit 2 and the slide plate 10 are integrated by the spring 20. Yes.
[0020]
Further, the spring 20 serves as a buffer when the stage unit 2 is moved by inserting a disk or the like.
[0021]
Referring to FIGS. 1 to 4, a disk stopper 22 is slidably connected to the flange end of one disk holder 3R via a pin 21, and a pin 23 is fixed to the disk stopper 22. . The pin 23 is fitted into the cam groove 24A of the eject plate 24, and when the eject plate 24 moves from the back side toward the entrance side along the stage unit 2 as will be described later, It is configured to be movable in the groove 24A.
[0022]
A combination of the convex portion 11 and the concave portion 12 is formed on the side surface portion 1 </ b> B of the chassis 1 at two locations with an interval from the entrance side to the back side. On the other hand, two pins 13 that can be engaged with the convex portion 11 are installed at both sides of the stage unit 2 at the same interval as the convex portion 11.
[0023]
When the pair of slide plates 10 are moved by the actuator from the entrance side to the back side of the chassis 1 as shown in FIG. 4 for each stage unit 2, the disk unit D 1 reaches the position of the turntable 9. As shown in FIG. 5A, each pin 13 abuts on each convex portion 11 formed on the side surface portion 1 </ b> B of the chassis 1. The spring 20 is extended.
[0024]
When the pair of slide plates 10 are further moved to the heel side by the actuator, as shown in FIG. 5B, the pins 13 of the stage unit 2 are moved downward in the cam grooves 10A formed in the slide plate 10, As a result, the stage unit 2 sinks, and the disk D1 held here is transferred to the turntable 9 and chucked.
[0025]
When the disk D1 is transferred to the turntable 9, the stage unit 2 is submerged, but the present invention is not limited to this, and the turntable 9 can be raised toward the stage unit 2.
[0026]
When the stage unit 2 sinks, referring to FIG. 4, the inner edges of the pair of disc holders 3L and 3R come into contact with the conical pin 31, and the conical pin 31 expands in diameter downward. In a state where the stage unit 2 is submerged, the pair of disk holders 3L and 3R is pushed and expanded by the difference in diameter.
[0027]
Accordingly, the holding of the disk D1 by the pair of disk holders 3L and 3R is released substantially simultaneously with the completion of chucking of the disk D1 to the turntable 9. After that, the disc playback operation is started.
[0028]
FIG. 6 corresponds to FIG. 4, and FIGS. 7A and 7B correspond to FIGS. 5A and 5B, respectively, and show the inserted state of the 12-centimeter disc D2.
[0029]
In this configuration, as described above, there is a possibility that two types of disks D1 and D2 are inserted. The control of the motor that drives the turntable 9 differs depending on the size of the disc inserted.
[0030]
Therefore, a disk detection switch is provided.
[0031]
This disk detection switch detects the operation of one of the pair of disk holders 3L, 3R to detect which size of the disks D1, D2 has been inserted.
[0032]
For example, as shown in FIG. 10, a plate 41 that operates integrally with one of the disk holders 3L is provided, and the moving distance of the plate 41 is detected by three optical sensors 42, 43, and 44. The first light sensor 42 is installed at a position corresponding to the initial position of the disk holder 3L, and the second light sensor 43 is installed at a position corresponding to the disk holder 3L in a state where the 8-cm disk D1 is held. The sensor 44 is installed at a corresponding position of the disc holder 3L in a state where the 12 cm disc D2 is held. Before the disc is inserted, only the first optical sensor 42 detects the plate 41 as shown in FIG. 10A.
[0033]
When the 8-cm disc D1 is inserted, the disc D1 is held between the pair of disc holders 3L and 3R, and only the second photosensor 43 detects the plate 41 as shown in FIG. 10B. When the chucking of the 8-cm disc D1 to the turntable 9 is completed, the holding of the disc D1 by the pair of disc holders 3L, 3R is released, so that as shown in FIG. 10C, the three optical sensors 42, 43, All 44 do not detect the plate 41.
[0034]
When the 12 cm disc D2 is inserted, the disc D2 is held between the pair of disc holders 3L and 3R, and only the second photosensor 43 detects the plate 41 as shown in FIG. 10D. When the chucking of the 12 cm disc D2 to the turntable 9 is completed, the holding of the disc D2 by the pair of disc holders 3L and 3R is released. Therefore, as shown in FIG. The optical sensor 44 detects the plate 41.
[0035]
According to the above configuration, when all of the three optical sensors 42, 43, 44 do not detect the plate 41, the insertion of the 8-cm disc D 1 is detected, and only the second optical sensor 43 and the third optical sensor 44 are detected by the plate 41. Is detected, insertion of the 12-centimeter disc D2 is detected.
[0036]
Next, disk ejection will be described.
[0037]
When ejecting the disc, the pair of slide plates 10 are moved from the heel side of the chassis 1 to the entrance side by the actuator, as shown in FIG. The spring 20 contracts.
[0038]
When this movement is started, first, the pin 13 of the stage unit 2 moves upward in the cam groove 10A formed in the slide plate 10, whereby the stage unit 2 is lifted and the disk D1 held here is held. However, at the same time as being separated from the turntable 9, the inner edges of the pair of disc holders 3L and 3R are separated from the outer peripheral portion of the conical pin 31, and the disc D1 is held by the pair of disc holders 3L and 3R.
[0039]
In this state, when the pair of slide plates 10 move to the entrance side of the chassis 1, the stage unit 2 moves integrally therewith, and the disk is ejected to the position of the broken line held by the disk holders 3L and 3R. . At the position of the broken line, there are too few disk portions protruding outside the chassis 1, and it is difficult to eject the disk by grasping this disk portion.
[0040]
In the above configuration, when the pair of slide plates 10 further move to the entrance side of the chassis 1, the claw portion 10B of the slide plate 10 pushes the protruding piece 24B of the eject plate 24, and the eject plate 24 moves to the entrance side. To do. That is, long holes 24C are formed in the eject plate 24 at three locations, and the pins 33 of the stage unit 2 are fitted into the long holes 24C, and the eject plate 24 moves to the entrance side as guided by the pins 33. To do.
[0041]
When the eject plate 24 moves, the pin 23 moves in the cam groove 24A of the eject plate 24, and the disk stopper 22 swings around the pin 21 according to the cam profile of the cam groove 24A.
[0042]
The disc stopper 22 pushes the disc held between the disc holders 3L and 3R to the final ejection position indicated by the solid line. At the solid line ejection position, the disk portion protruding outside the chassis 1 is large, and the disk ejection operation by grasping this disk portion becomes extremely easy. FIG. 9 corresponds to FIG. 8 and shows the inserted state of the 12 cm disc D2.
[0043]
In this embodiment, the disk holders 3L and 3R convey the disk while holding the outer periphery of the disk, so that the conveyance roller does not contact the disk recording surface and the disk surface is not damaged as in the prior art.
[0044]
Further, since the disc holders 3L and 3R move in parallel with each other, they can follow discs of different sizes and can easily hold them.
[0045]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0046]
【The invention's effect】
In the present invention, the disk holder holds and conveys the outer periphery of the disk, so that the conveyance roller does not come into contact with the disk recording surface and the disk surface is not damaged.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams illustrating an embodiment of a disk loading mechanism.
FIGS. 2A, 2B, and 2C are views showing a state in which an 8-cm disc is inserted.
FIGS. 3A and 3B are views showing a state in which a 12 cm disc is inserted.
FIGS. 4A and 4B are diagrams illustrating a process from insertion of an 8-cm disc to chucking. FIGS.
FIGS. 5A and 5B are diagrams illustrating movement of a stage unit that conveys an 8 cm disc. FIGS.
FIGS. 6A and 6B are diagrams illustrating a process from insertion of a 12 cm disc to chucking. FIGS.
FIGS. 7A and 7B are views for explaining the movement of a stage unit that conveys a 12-centimeter disc. FIGS.
FIGS. 8A and 8B are diagrams illustrating an operation for ejecting an 8-cm disc. FIGS.
FIGS. 9A and 9B are diagrams for explaining a discharging operation of a 12 cm disc.
FIGS. 10A to 10E are diagrams illustrating a detection procedure by a disk detection switch. FIGS.
[Explanation of symbols]
1 Chassis 2 Stage unit 3L, 3R Disc holder 8 Pin 9 Turntable 10 Slide plate 22 Disc stopper 24 Eject plate

Claims (4)

In the disc loading mechanism that holds the outer periphery of the disc and transfers the disc to the turntable,
A stage unit that moves along the chassis;
A pair of disc holders installed in this stage unit, which move in parallel according to the size of the disc to be inserted, and hold the outer periphery of the disc,
Means for moving the stage unit to reach the position of the turntable with the disc held by the pair of disc holders;
Means for moving the stage unit or the turntable to transfer the disk that has reached the position of the turntable to the turntable;
And a means for releasing the holding of the disk by a pair of disk holders when the transfer of the disk to the turntable is completed.   2. The disk loading mechanism according to claim 1, wherein the pair of disk holders each include a pair of pins for holding the outer periphery of the disk at a predetermined interval.   3. The disc loading mechanism according to claim 1, further comprising ejecting means for pushing the disc held between the pair of disc holders further toward the entrance side than the position when the disc is ejected.   4. The disk loading mechanism according to claim 3, further comprising a mechanism for interlocking the ejecting means and the means for moving the stage unit.

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