KR940000358Y1 - Operating device of optical pick-up slide - Google Patents

Abstract

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Description

Optical pickup slide drive

Figure 1 is a perspective view of the invention optical pickup slide drive device.

2 is a plan view of the optical pickup slide drive device of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a perspective view of a conventional optical pickup driving device.

5 is a plan view of a conventional optical pickup driving device.

6 is a sectional view taken along the line B-B in FIG.

* Explanation of symbols for main parts of the drawings

1: optical pickup 2: pickup base

3: sensing coil 4: driving coil

5, 6: York 7, 8: magnet

The present invention relates to an optical pickup slide driving apparatus for an optical disc player using a linear DC motor, and in particular, a magnet for driving an optical pickup as a driving guide shaft can be designed to reduce the size and weight of a device.

In the conventional optical pickup driving apparatus, as illustrated in FIGS. 4 to 6, the sensing bobbin 22 in which the sensing coil 21 is wound and the driving bobbin 24 in which the driving coil 23 are wound are respectively installed on both sides of the upper part. A pickup base 27 having a pickup module base 25 fixed to a pickup base 27 through which a guide shaft 26 passes through the center of the pickup module base 25, and an optical pickup 28 attached to the pickup base 27; The yokes 29 and 30 penetrating the center of the sensing bobbin 22 and the driving bobbin 24, the magnets 31 and 32 opposed to the sensing and driving coils 21 and 23, and the magnets 31 and 32 The attached plates 33 and 34 form a magnetic circuit, and both ends of the guide shaft 26 and the plates 33 and 34 are screwed to the chassis. Same as

That is, as shown in FIG. 5, when a current is supplied to the driving coil 23, the pickup module base 25 is moved by the electromagnetic force between the driving coil 23 and the magnet 32 (according to Fleming's left-hand rule). The optical pickup 28 slides to the desired data position on the optical disc while the guide shaft 26 slides forward and backward along the current direction, while the pickup module base 25 moves to the sensing coil 21. Back EMF is generated and this back EMF is fed back to the drive coil 23 (not shown in the circuit arrangement) to control the position of the optical pickup 28.

However, such a conventional optical pickup driving apparatus must include a plurality of bobbins 22 and 24 and a pickup base 27 on the pickup module base 25, and also penetrate the bobbins 22 and 24 to form a magnetic circuit. Since the yoke 29 and 30 and the guide shaft 26 are to be provided, the number of parts increases, thereby lowering assembly productivity and increasing the cost, and increasing the volume of the driving device.

The present invention combines the pickup base as a bobbin for driving and sensing, and the driving magnet as a slide guide shaft to reduce the number of parts of the optical pick-up driving device and provides convenience and efficiency in assembly. It is an object of the present invention to provide an optical pickup slide driving apparatus for an optical disk player that can reduce costs and reduce the weight and weight of equipment by reducing the number of parts. .

In the optical pickup slide drive device of the present invention, as shown in FIGS. 1 to 3, an optical pickup 1 is attached, a sensing coil 3 is wound on one side, and a driving coil 4 is wound on the other side. Both ends are attached to the yoke 5 and 6 through the base 2 and the center of the pickup base 2, and drive magnets 7 and 8 coated with plastics for lubrication on the outer circumferential surface thereof are provided. The pickup bases 2 are configured to slide by the driving magnets 7 and 8.

As shown in FIG. 2, the driving effect of the present invention driven as described above is that when current is supplied to the driving coil 4, a pickup module (optical pickup) is generated by an electromagnetic force between the driving coil 4 and the magnets 7 and 8. 1) + pick-up base 2 is slide-guided to magnets 7 and 8 and driven forward and backward along the current direction.

On the other hand, as the pickup module is moved, back electromotive force is generated in the sensing coil 3, and the back electromotive force is fed back to the driving coil 4 to perform optical pickup position control in a normal pickup control circuit.

When the pickup module slides on the magnets 7 and 8, the sliding friction is minimized and the smooth movement is possible because the plastics having good lubricity are coated on the outer circumferential surfaces of the magnets 7 and 8.

In addition, since the pickup base 2 also serves as the bobbin of the sensing coil 3 and the driving coil 4, the use of a separate bobbin is excluded, and the magnets 7 and 8 penetrate the center of the pickup base 2 to guide the shaft. Play a role, simplifying the configuration associated with slide guidance.

As described above, according to the present invention, the configuration of the optical pick-up driving device can be simplified to provide convenience and efficiency in assembly work, to reduce costs, and to make the device compact.

Claims (1)

The optical pickup 1 is attached and the sensing coil 3 is wound on one side thereof, and the pickup base 2 on which the driving coil 4 is wound on the other side thereof, and the yoke 5 penetrates through the center of the pickup base 2. , 6) both ends are attached to the outer circumferential surface is provided with a driving magnet (7, 8) coated with a plastic for lubrication, and the pickup base (2) is configured to slide guide by the driving magnet (7, 8) An optical pickup slide drive.