JPH07296480A - Disc pickup device - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the structure by simplifying the structure of the disc pick-up device that picks up a disc from the tray of the disc carrier and then returns it to the same tray in the disc autochanger. [Structure] A disc (15) picked up from a disc carrier of a disc pickup device is sandwiched between a disc clamper (19) and a disc hook (24), and the disc hook (24) is mounted on the disc carrier (1).
The disk is held by the holding portion formed in 3) and only the pickup unit (17) is driven up and down to pick up and return the disc (15).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk pick-up device for picking up a disk on a tray pulled out on a disk carrier of an automatic disk changer, and particularly to a mechanical simplification of a conventional device. .

[0002]

2. Description of the Related Art The following is a pickup mechanism of a disc pickup device which is currently in practical use. A carrier table for slidably holding the tray in a horizontal direction, a pickup base vertically slidably mounted on the disk carrier table, a drive mechanism for driving the pickup base, and a pickup base held by the pickup base. A permanent magnet located directly above the center of the disk, an iron core that forms a magnetic path via the yoke with the permanent magnet, and a position coaxial with the iron core, and cancels the magnetic field of the permanent magnet when energized. A coil that works, a disc hook holder that is located directly below the center hole of the disc and moves in the opposite direction in conjunction with the pickup base, an interlocking mechanism that interlocks the disc hook holder with the movement of the pickup base, and a disc hook holder. The disc hook made of a ferromagnetic material that is held on the iron core and is attracted to the iron core when the disc hook holder rises. It is composed of a click.

Now, referring to FIGS. 2 and 3, a pickup having a permanent magnet 3 and a coil 4 built-in for a disk 2 placed on a tray 1 which is pulled out from a tray housing and held on a disk carrier. At the same time when the base 5 is lowered by the drive mechanism 6, the disc hook holder 8 is raised through the interlocking mechanism 7, and the disc hook 11 is attracted to the iron core 10 forming a magnetic field through the yoke 9 so that the disc 2
After holding the disc, the drive mechanism 6 raises the pickup base 5 holding the disc 2 and at the same time lowers the disc hook holder 8, so that the empty tray 1
Is ready for transfer.

On the contrary, when the disc 2 picked up by the pickup base 5 is to be placed on the tray 1, the pickup base 5 is lowered and at the same time the disc hook holder 8 is raised so that the disc 2 is removed. When placed on the tray 1, the coil 4 is energized,
The magnetic field of the permanent magnet 3 is canceled, the attraction force of the disc hook 11 is released, and the disc hook 11 is dropped into the disc hook holder 8 to release the holding of the disc 2.

The pickup base 5 is raised and the disc hook holder 8 is lowered to make the tray 1 movable.

[0006]

The above-mentioned pickup mechanism has a problem in that it requires a mechanism for moving the disc hook 11 up and down in conjunction with the vertical movement of the pickup base 5, which makes the mechanism complicated.

[0007]

SUMMARY OF THE INVENTION Therefore, the present invention is conceived as a result of various improvements and contrivances in order to solve the above-mentioned problems, and the present invention is a disk hook for holding a disk hook. The holder has a fixed structure, the interlocking mechanism for moving it up and down is eliminated, and the iron core that forms the magnetic field is lowered to the position of the disk hook holder to be adsorbed and held by the disk clamper from above.

That is, according to the present invention, a disc carrier for holding a tray on which a disc is placed slidably in a horizontal direction, and a pickup base vertically slidably attached to the disc carrier. A driving device for driving the pickup base up and down, a magnet element held by the pickup base and located right above the center of the disc, and an iron core connected to the magnet element via a yoke to form a magnetic path. A coil that is coaxial with the iron core and that cancels the magnetic field of the magnet element when energized; a disk clamper slidably held by the iron core and urged downward by a spring; A disk pickup device is provided, which is configured to include a disk hook that is attracted to an iron core by an element.

In the above structure, it is preferable that the magnet element is a permanent magnet. Further, the disc hook is housed in a recess formed in the disc carrier, and at the time of pickup, the disc hook is attracted from the recess by the iron core moved to the bottom dead center, and the disc is clamped with the disc clamper. It is preferable.

[0010]

According to the above-mentioned structure, the disk hook holder conventionally provided as an element for holding the disk hook is unnecessary, and the interlocking mechanism for driving the disk hook holder can be omitted. At the same time as the number of parts in the carrier is reduced, the workability of assembling in the disk carrier is improved, and as a result, the cost can be reduced.

[0011]

1 is a sectional view showing the structure of a disk pickup device according to the present invention. A disc pickup device according to the present invention includes a carrier table that holds a tray slidably in a horizontal direction, a pickup base that is vertically slidably attached to the carrier table, and a vertically driven pickup base. Drive mechanism, a permanent magnet that is held by the pickup base and is located directly above the center of the disc, an iron core that is connected to the permanent magnet through a yoke to form a magnetic field, and a position that is coaxial with the iron core. A coil (electromagnet) that is provided to act to cancel the magnetic field of the permanent magnet when energized, a disk clamper that is slidable along the iron core and held by the lower end of the iron core that is retained, and the disk clamper And a disk hook that is held in a recess provided in the upper portion of the carrier table directly below the iron core. Here, a more detailed description will be given with reference to the drawings.

The transfer table 13 is pulled out from the tray storage section.
A disk 15 placed on a tray 14 held above
On the other hand, the pickup driving mechanism 16 lowers the pickup unit 17. At this time, the disc 15 is pressed by the disc clamper 19 which is urged downward by the spring 18. When the iron core 23 slides in the hole of the disk clamper 19 and comes near the bottom dead center, the yoke 2
The disk hook 24 is attracted by the iron core 23 that transmits the magnetic field of the permanent magnet 21 via 0.

When the pickup unit 17 is raised, the disk clamper 19 is urged downward by the spring 18, so that the iron core 23 is slid and the disk 1 is moved.
5 is kept pressed, and when the disk hook 24 reaches the lower surface of the disk 15, the disk 15 is held, and as the pickup unit 17 rises, the disk 15
After being picked up, the empty tray 14 can be transferred.

On the contrary, when the disc 15 in the picked-up state is lowered and placed on the tray 14, the pickup driving mechanism 16 is lowered so that the disc 15 is placed on the tray 14. The clamper 19 crimps the disk 15. At this time, the disc hook 24
The iron core 23 that has adsorbed is slid in the disk clamper 19, and when reaching the vicinity of the bottom dead center, the coil 22 is energized,
When the magnetic field of the permanent magnet 21 is canceled, the disc hook 24
Loses its magnetic attraction force and is dropped, and is stored in a recess in the carrier. At this point, when the pickup unit 17 is raised, the tray 14 on which the disk 15 is placed can be transferred to the tray storage section. .

By adopting the above-mentioned pickup mechanism as the mechanism of the disc pickup device at the time of disc exchange of the disc autochanger, simplification of the mechanism and improvement of assembling workability can be realized.

[0016]

When the disc pickup mechanism according to the present invention is applied to the disc pickup and holding means in the disc transfer mechanism of the disc reproducing apparatus or the disc manufacturing apparatus, the simplification of the mechanism can be realized, and the cost can be reduced. It is possible to plan.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a conventional disc pickup device.

FIG. 2 is a perspective view of the above apparatus.

FIG. 3 is a cross-sectional view showing a configuration of an electromagnetic disk pickup device according to the present invention.

[Explanation of symbols]

 13 ... Transport base 14 ... Tray 15 ... Disc 16 ... Drive mechanism 17 ... Pickup 18 ... Spring 19 ... Disc clamper 20 ... Yoke 21 ... Permanent magnet 22 ... Coil (electromagnet) 23 ... Iron core 24 ... Disc hook

Claims (1)

[Claims] 1. A disc carrier for holding a tray on which a disc is placed slidably in a horizontal direction, a pickup base vertically slidably attached to the disc carrier, and a pickup base for vertical movement. A drive device that is driven by the magnet, a magnet element that is held by the pickup base and is located directly above the center of the disk, an iron core that is connected to the magnet element via a yoke to form a magnetic path, and a coaxial with the iron core. A coil that acts to cancel the magnetic field of the magnet element when energized, a disc clamper slidably held by the iron core and urged downward by a spring, and the magnetic element attracts the iron core. And a disc hook that is formed.