KR20070120233A - Structure for preventing scratch in optical disk drive - Google Patents

Abstract

A structure for preventing scratch in an optical disc device is provided to guarantee safety against a collision and assembling reliability in high temperature and high humidity condition. In a structure for preventing scratch in an optical disc device reading or recording a signal on an optical disc by using an optical pickup actuator with a lens holder(102) having an objective lens(101) at a center portion, a protector(104) is installed on the top surface of the lens holder to buffer a collision between the optical disc inserted into the optical disc device and the objective lens of the lens holder. The protector prevents scratch on the surface of the objective lens or the optical disc, caused by the collision between the inserted optical disc and the objective lens. The protector is supported at an edge portion of the top surface of the lens holder by a thermal binding tape(103).

Description

 Structure for preventing scratch in optical disk drive

1a and 1b are a plan view and a front view schematically showing the appearance of a typical optical pickup actuator.

2 is a schematic plan view of an optical pickup actuator installed with a scratch prevention function according to the present invention;

Figure 3 is a schematic front view of the optical pickup actuator installed with a scratch prevention function according to the present invention.

※ Explanation of code for main part of drawing

11,101: objective lens 12,102: lens holder

13: focusing coil 14: tracking coil

15 wire suspension 16 fixed substrate

17 damper holder 103 heat-sealed tape

104: Protector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scratch prevention structure in an optical disk device, and for example, in an optical disk device for preventing scratches on the surface of an optical disk or an objective lens caused by a collision between an optical disk inserted and seated in an optical disk device and an objective lens of an optical pickup. The scratch prevention structure of this invention is related.

In general, an optical disk apparatus includes an optical pickup actuator in which an objective lens is configured to follow a center of a signal track of an optical disk with respect to the surface vibration and eccentricity of the optical disk according to the rotation of the optical disk. And an optical pickup actuator (hereinafter referred to as an optical pickup) to drive an objective lens to perform focusing and tracking operations.

The focusing operation is to drive the objective lens up and down so that the light spot of the light beam from the objective lens falls within the depth of focus in the signal track of the optical disc, and the tracking operation is that the light spot of the light beam from the objective lens is a signal of the optical disc. The track is driven left and right to follow the center.

1A and 1B are a plan view and a front view schematically illustrating the appearance of a general optical pickup actuator. As shown in FIGS. 1A and 1B, an objective lens 11 is mounted at a central portion, and focusing and tracking is performed on an outer circumferential surface thereof. A lens holder 12 to which the coils 13 and 14 are coupled, and an upper end of which is fixed to the upper and lower fixing substrates 16 of the lens holder 12 to support the lens holder 12. , A plurality of wire suspensions 15 and a damper holder 17 provided on one side of the lens holder 12 to support a damper having the other end of the wire suspension 15 fixed thereto.

The objective lens 11 of the optical pickup is mounted on the lens holder 12, the focusing coil 13 is wound around the lens holder 12 for focusing on the circumferential surface, and in the forward direction to each corner surface for tracking. The wound tracking coil 14 is attached.

Fixing substrates 16 are coupled to upper and lower side centers of the lens holder 12, and one end of a plurality of parallel wire suspensions 15 is soldered to each of the fixing substrates 16, and the wire suspension 15 is soldered. The other end of) is fixed to the main board through a damper holder 17 provided on one side of the lens holder 12.

Here, a damper (not shown) is coupled to the damper holder 17 so as to have a rigid damping characteristic of the wire suspension 15, and a main substrate (not shown) is coupled to the outside so that the wire suspension is coupled to the damper holder 17. Let the other end of (15) be soldered and fixed. In addition, the wire suspension 15 floats the lens holder 12 and serves as a relay line for supplying current.

On the other hand, in order to prevent a collision between the objective lens of the conventional optical pickup and the optical disk, a mechanical stopper is formed between the objective lens 11 and the optical disk to prevent direct collision between the optical disk and the objective lens 11 of the optical pickup. Although this is effective in products with a working distance (hereinafter referred to as WD) such as CD / DVD, the risk of scratching the optical disk surface due to the collision between the stopper and the optical disk surface It is not a fundamental alternative because it contains.

In addition, WD is inevitably reduced in product development and product thinning with high numerical aperture (e.g. Blu-ray, etc.) for high density data recording, and optical disk surface and recording in Blu-ray. The distance between the layers is reduced to 1/6 of the DVD, which indicates a significant vulnerability in reliability when scratches occur.

Accordingly, the present invention was created to solve the above problems, and for example, prevents surface scratches of an optical disk or an objective lens due to a collision between an optical disk inserted into an optical disk device and an objective lens mounted at the center of the lens holder. It is an object of the present invention to provide a scratch prevention structure in an optical disk apparatus in which a protector is attached to the upper edge of the lens holder in a heat fusion manner through a heat fusion tape.

The scratch prevention structure in the optical disk apparatus according to the present invention for achieving the above object is an optical disk for reading or recording a signal recorded on the optical disk using an optical pickup actuator having a lens holder with an objective lens mounted in the center In the apparatus, a protector for cushioning the collision between the optical disk inserted into the optical disk device and the objective lens mounted in the center of the lens holder is attached to the upper surface of the lens holder.

The protector of the present invention is characterized in that to prevent the surface scratch of the optical disk or the objective lens due to the collision between the inserted optical disk and the objective lens, the protector is attached to the upper edge of the lens holder through the heat sealing tape It is characterized in that it is supported.

Hereinafter, a preferred embodiment of the scratch prevention structure in the optical disk apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic plan view of an optical pickup actuator provided with a scratch prevention function according to the present invention, and FIG. 3 is a schematic front view of an optical pickup actuator installed with a scratch prevention function according to the present invention.

First, in the optical pickup actuator to which the scratch prevention structure of the optical disk apparatus according to the present invention is applied, as shown in FIG. 2, for example, the objective lens 101, the lens holder 102, the focusing coil 13, the tracking, and the like. The coil 13 and 14, the plurality of wire suspensions 15, the fixed substrate 16, and the damper holder 17 are included, and the optical disk and the lens holder 102 inserted and seated in the optical disk device. A protector 104 is further installed to cushion the collision between the objective lenses 101 mounted at the center of the lens.

In addition, the protector 104 prevents surface scratches of the optical disk or the objective lens due to the collision between the optical disk inserted into the optical disk device and the objective lens 101, and is opened on the edge of the upper surface of the lens holder 102. The adhesive tape 103 is installed to be attached and supported in a thermal fusion manner.

The optical pickup actuator includes a lens holder 102 including the objective lens 101 and coils 13 and 14 for focusing and tracking to an outer surface of the lens holder 102. In order to support the lens holder 102, a fixing substrate 16 is installed on upper and lower sides of the lens holder 102, and one end of the fixing substrate 16 is installed on the upper and lower sides of the lens holder 102. A plurality of fixed upper and lower wire suspensions 15 and a damper holder 17 are provided at one side of the lens holder 12 to support a damper to which the other end of the wire suspension 15 is fixed.

In addition, as shown in FIG. 3, the optical pickup actuator receives a signal recorded on an optical disc Disc mounted and mounted on an optical disc device through a protector 104 attached to and supported by an upper edge of the lens holder 102. The surface scratch of the optical disk or the objective lens 101 caused by the collision between the optical disk and the objective lens 101 is prevented during the read or write operation.

The protector 104 generates a stress concentration on the surface of the optical disk due to friction during collisional contact with the surface of the protector 104 attached to the lens holder 102 that is relatively stationary with the optical disk that rotates at a high speed. ) Attaches the protector 104 to the lens holder 102 in a heat-sealed manner by using a heat-sealing tape 103 to prevent the falling from the mounting surface of the lens holder 102, so that the The assembly reliability can be improved as well as the safety by collision.

As described above, the scratch prevention structure of the optical disk apparatus of the present invention is formed by attaching a protector, which serves as a shock absorber between the objective lens and the optical disk, to the upper edge of the lens holder in a heat-sealed manner by using a heat-sealed tape. By improving the adhesive strength, it is possible to significantly improve the assembly reliability and collision safety under environmental conditions such as high temperature and high humidity.

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The scratch prevention structure in the optical disk device according to the present invention made as described above, for example, the present invention relates to the scratch prevention structure in the optical disk device, for example, an optical light having a lens holder with an objective lens mounted in the center thereof. An optical disk apparatus for reading or recording a signal recorded on an optical disk by using a pickup actuator, wherein the surface of the optical disk or the objective lens is scratched due to a collision between the optical disk inserted in the optical disk apparatus and the objective lens mounted at the center of the lens holder. By attaching and installing a protector to prevent the damage to the upper edge of the lens holder by using a heat-sealed tape, an optical disk or an object caused by the collision between the optical disk inserted into the optical disk device and the objective lens of the optical pickup Lens hole scratches the surface of the lens Since the anti-through the protector attached to the heat-sealing method, there is an effect capable of ensuring the safety of the protector assembly and reliability in high temperature and high humidity, such as a collision environment.

Claims (3)

 An optical disc apparatus for reading or recording a signal recorded on an optical disc by using an optical pickup actuator having a lens holder with an objective lens mounted at the center thereof. And a protector attached to an upper surface of the lens holder to cushion a collision between the optical disk inserted into the optical disk device and the objective lens mounted at the center of the lens holder. The method of claim 1, The protector prevents scratches on the surface of the optical disk or the objective lens due to the collision between the inserted optical disk and the objective lens. The method of claim 1, The protector is a scratch prevention structure in the optical disk device, characterized in that attached to the upper surface of the lens holder by a heat-sealed tape.

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