Objective lens driving device

Abstract

The subject of the present invention is to provide an objective lens driving device, which can increase the acceleration sensitivity in the focus and tilt directions without unnecessary resonance in the driver of the symmetrical objective lens driving device, and can realize high magnification. A kind of objective lens driving device has: objective lens frame; Vibration damping seat elastically supporting above-mentioned objective lens frame by the first suspending wire; Have the coil part (16) of tilting coil (6) and focusing coil (7); Be respectively arranged on above-mentioned objective lens The tracking coil (4) near both ends of the first direction of the frame; in the first direction, at least the above-mentioned coil component (16) is clamped, and it is arranged to connect with the two ends of the above-mentioned first direction of the above-mentioned objective lens frame 2 pairs of four main magnets (2); 2 auxiliary magnets (1) that are respectively sandwiched by the pair of coil components (16) in the first direction.

Description

technical field [0001] The invention relates to an objective lens drive device for an optical pick-up head of an optical disk drive, in particular to an objective lens frame. Background technique [0002] Optical disc drive is used to read the disc (CD, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD+R, DVD-R, DVD-RAM, DVD+RW, DVD-RW, Blu- ray, AOD, etc.), or a device that writes information, etc. This type of optical disc drive has an optical pickup that irradiates laser light onto the optical disc and detects the reflected light in order to read information from the optical disc or write information on the optical disc. [0003] In general, an optical pickup has a laser light source that emits a laser beam, an optical system that guides the emitted laser light to an optical disc, and guides the reflected light to a photodetector. Therefore, the optical system includes an objective lens disposed facing the optical disc. [0004] In order to accurately focus laser light on a rotational...

AI Technical Summary

Problems solved by technology

Although this asymmetric type can improve the acceleration sensitivity, it is very difficult to avoid unnecessary resonance such as roll, pitch, or yaw of the objective lens.

[0028] On the other hand, if it is formed into a symmetric (Synmetry) formula, although unnecessary resonance will not easily occur, the acceleration sensitivity in the focus and tilt directions will decrease, and it will be difficult to achieve high speed.

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