Optical read-write head actuator having arranged horizontal magnetic field producing device and coil device

Abstract

The present invention relates to an optical pickup head actuator comprising two magnetic elements and four metal wires; a field lens carrying a platform that is arranged between the two magnetic elements to bear the weight of a lens, and the field lens carrying the platform comprises at least a fixed end to connect with the four metal wires and make the field lens carrying the platform suspended; and a planar coil device which is positioned on the field lens carrying the platform. Two focus coils and two tracking coils form on the planar coil device, and two connection cushions form respectively on the two flat sides of the planar coil device so as to connect individually and electrically with the four metal wires. The two out of four connection cushions can be electrically connected to the two focus coils, and the other two connection cushions are connected to the two tracking coils.

Description

technical field [0001] The present invention relates to an optical read-write head actuator, and in particular to an optical read-write head actuator with a horizontally arranged magnetic field generating device and a coil device. Background technique [0002] In today's information explosion, most multimedia products are distributed in the form of discs. The optical read-write head in the optical disc drive is responsible for reading data from the disc or writing data to the disc, so it naturally plays an indispensable role in today's access technology. [0003] Please also refer to figure 1 , figure 2 and image 3 . figure 1 Shown is a top view of a conventional optical read / write head actuator. figure 2 Shown is a side view of a conventional optical read / write head actuator. image 3 Shown is a perspective view of a conventional optical read / write head actuator. The optical pickup actuator 100 includes an objective lens stage (not shown in the figure), a magnetic...

AI Technical Summary

Problems solved by technology

[0007] However, in order to generate the first force and the second force perpendicular to each other in the traditional optical read-write head actuator to respectively drive the objective lens stage to move along the focusing direction and the tracking direction, the research and development personnel need to make the focusing The planes of the coil and the tracking coil are perpendicular to each other, so that the winding process of the focusing coil and the tracking coil is not only cumbersome and complicated, but also increases the manufacturing time and production cost

Also because of this reason, it is difficult to effectively reduce the volume and thickness of the optical read-write head actuator, which limits the application of the optical read-write head in thin disk drives and small form factor optical disk drives (Small Form Factor Optical Disk Drive, SFFO).

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