JPH02126402A - Magneto-optical bias magnet mechanism - Google Patents

Abstract

PURPOSE:To obtain a simple and reliable mechanism by utilizing the action of a loader mechanism which conveys a cartridge so that a new driving source is not added. CONSTITUTION:When the disk cartridge 1 is inserted in the loader 2, a cartridge shutter 4 is opened by the arm 3 of the loader 2. By inserting the cartridge 1 more, the cartridge 1 butts on the end surface 5 of the loader 2 and the loader 2 starts to move. The loader 2 moves along the L-shaped guiding groove 7 of a loader base 6 and the cartridge 1 gets on loader pins 8 and 8' which are positional reference and stops at the end C of the guiding groove 7. In such a state, the reference surface 12 of an electromagnet 9 comes into contact with the upper end surface 15 of the loader 2 and stops, then the projecting part 14 of a magnet arm 13 becomes in non-contact state with the upper end surface 15 of the loader 2. An optical disk 16 is set on the hub 18 of a spindle motor 17 and starts to rotate. The optical disk 16 and the electromagnet 9 face without contacting with each other and when electricity is applied to the electromagnet 9 a fixed quantity of magnetic field is generated on the recording surface of the optical disk 16 so as to perform the erasion and rewriting of data.

Description

[Detailed Description of the Invention] [Industrial Application Field] This device belongs to the original disk drive device using magneto-optical technology, and is used in rewritable WCDs, video disks, combiator memories,
Suitable for 1dllf image memory, etc.

[Conventional technology]

The conventional optical-air head only shows the basic configuration of magneto-optical recording as disclosed in Japanese Patent Application Laid-Open No. 115256/1982, and describes the specific positional relationship between the optical head and bias magnet, its positioning method, and rope ink. There was no consideration given to the relationship with the organization.

[Problem that the invention seeks to solve]

The objects of the present invention are: (1) To use a conventional drive source for moving the bias magnet without installing a new drive source.

(2) The disc recording surface and the magnet should be set at the same distance when set, using a highly accurate mechanism with little variation.

(3) When ejecting the disc cartridge, the magnet should move away from the cartridge and remain stationary.

The above contents are achieved by a low-cost, high-1Pr reliable mechanism.

[Means for solving problems]

In order to achieve the above objective (1), the operation of the loader mechanism for transporting the cartridge is utilized and no new drive source is added. However, the bias magnet (
In order to support [16 stones], a lever-type arm is attached,
The spring force ensures that it is always in contact with one part of the loader mechanism. In (2), the bias magnet was brought into contact with the frame of the loader mechanism, and the IK frame, in which the cartridge was set and the disk was chucked to the spindle, was used to achieve a certain dimensional accuracy with respect to the tisf recording surface.

(3) is a mechanism in which the bias magnet support arm is pushed away and separated when the loader mechanism is ejected. At that time, the arm had an inclination angle, but the spring was attached so that the bias magnet was parallel to the base. The above method provides a simple mechanism to achieve the goal.

[Effect]

The technical means is a lever type, posture control using MflA and a spring, which uses new technology. t) Since the mechanism is not complicated, malfunctions are rare.

〔Example〕

A magneto-optical disk is an optical disk that can be used to rewrite data. That magneto-optical disk drive! ftK requires a magnet to generate a magnetic field. When the original disk cartridge is installed in the magneto-optical disk drive, an electromagnet is set near the surface of the original disk, and by passing a current, a magnetic field is generated on the recording surface of the magneto-optical disk, and recording is started. Used to erase or rewrite data. This idea is
He devised a mechanism to operate this electromagnet.

Embodiments of the present invention will be described below with reference to FIGS. a41 to 4. FIG. 1 is a plan view of a transport mechanism loader 2 and an 'iIL magnet mechanism for a disk cartridge 1 of a magneto-optical disk device.
FIG. 2 is a side view. When the disk cartridge 1 is inserted into the loader 2, the cartridge shutter 4 is opened by the arm 5 of the loader 2, and the disk cartridge 1 is further inserted and the disk cartridge 1 hits the end surface 5 of the loader 2, and the loader 2 The loader 2 starts moving.
It moves along the L-shaped guide groove 7 of the loader pace 6, and stops at the C end of the guide groove 7 when the disk cartridge 1 rides on the loader bin 8.8', which is the reference position.

Meanwhile, the Xa stone 9 uses the arm shaft 10 as a fulcrum,
The protrusion 1 of the magnet arm 13 is pulled by the spring 11.
4 or in contact with the upper end surface 15 of the loader 2, and the loader 2
It is located higher up and is stationary. Only when the loader 2 moves from the B to the C end of the guide groove 7 does the upper end surface 15 of the loader 2 and the protrusion fs 14 of the magnet arm 13 come into contact with each other and descend. Then, the 'at111 stone 9 attached to the tip of the magnet 7-m 15 lowers (.

The future movements will be explained according to the detailed diagrams in Figures 5 and 4.

When the loader 2 reaches the C end of the L-shaped kite groove 7 and the disk cartridge 1 is placed on the loader bins 8, 8',
The reference surface 12 of the electromagnet 9 comes into contact with the upper end surface 15 of the loader 2 and stops. Then, the protrusion 14 of the magnet arm 16 does not come into contact with the upper end surface 15 of the loader 2. The optical disc 16 in the disc cartridge 1 is set on the hub 18 of the spindle motor 17, and the optical disc 16 starts rotating. The optical disk 16 and the electromagnet 9 face each other with a distance between them so that they never come into contact with each other. When electricity is passed through the electromagnet 9, a certain amount of magnetic field is generated on the recording surface of the original disk 16, and data is erased or rewritten.

Next, when ejecting the disk cartridge 1, the loader 2 is moved from the C end of the guide groove 7 via B to the A end using one of the ejection drive motor mechanisms. . In this case, when the base surface 12 of the 'mti stone 90 is pushed up by the loader 2 and the protrusion 14 of the electromagnet arm 13 begins to contact the upper end surface 15 of the loader 2,
゛IIL that was inside disk cartridge 1
When the m-stone 9 is lifted up and separated from the original disk 16 and the loader 2 passes through B, the electromagnet 9 is located further above the upper end surface 15 of the loader 2. The tIa stone 9 is lifted by the magnet arm 15, and the reason why the tIa stone 9 is kept horizontal without rotating 190 times on the tai stone fulcrums located at both ends of the magnet 90 is due to the protrusion of the base surface 12' of the electromagnet 90. spring 2
0 is wound around it and hooked onto the magnet arm 13. When the KIIti stone 9 is in contact with the upper end surface 15 of the loader 2, the force of the spring 110 is overcome, causing the spring 20 to bend 4 degrees, so that it comes into contact with the electromagnet 9 or the upper end surface 15 of the loader 2. There is.

By installing the spring 20 in this way, the 11L
This has the advantage that the m-stone 9 is not in a free state but is fixed and can be kept horizontally, reducing the mounting space.

The above embodiment does not require any new motion source for moving the p1 electromagnet 9, is mechanically simple, and is effective in terms of performance life, reliability, cost reduction, etc.

〔Effect of the invention〕

Since the present invention is simple without adding a large amount of mechanism, it is considered to be economical, easy to use, less complicated, and more reliable.

[Brief explanation of drawings]

Fig. 1 is a plan view of the loader and electromagnet of the main air drive IIjJ device according to an embodiment of the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a detailed view of the magnet mechanism of Fig. 1. , Detailed view of the vertical movement of the magnet in Figure 2, Figure 5 shows the electromagnet 1... disk cartridge, 2... loader, 3... arm, 4...
・Cartridge shutter, 5... End face, 6... Loader pace, 7... Guide groove, 8.8'... Loader bin, 9... 41 stones, 10... Arm shaft, 11...
...Spring, 12.12'...Reference surface, 15...
- Magnet arm, 14... protrusion, 15... upper end surface,
16... Optical disk, 17... Spindle motor,
18... hub, 19...'11r, rock support, 20
···spring. The worst part

Claims (1)

[Claims] 1. In a magneto-optical disk drive device, a bias magnet is attached to the arm, and the upper part of the loader mechanism is used as a positioning reference.The arm of the bias magnet moves in accordance with the operation of the loader mechanism for transporting the cartridge, and the cartridge is moved. A magneto-optical bias magnet mechanism characterized in that, at the same time as the disk is set on a spindle motor, the bias magnet is set at a position with a constant dimension from the recording surface of the disk.