JPS5916150A - Optical recording device - Google Patents

Abstract

PURPOSE:To simplify the assembly of a barrel where a lens system which irradiates a recording disc with laser light is stored, by using a honeycomb supporting material as this barrel. CONSTITUTION:The lens system which irradiates the recording disc with laser light is stored in a barrel, and this barrel is attached to a box body by a honeycomb supporting material 12. It is necessary that parts which hold a lens barrel, which holds a lens group, and a winding bobbin in air have shapes as if they not exist or have such shapes that a uniform function is possible, and it is desirable that their shapes have no directivity in the angular direction at the view from a plane on the assembling work. The supporting material 12 is constituted into a hexagonal reticulate shape, namely, a honeycomb shape. A butyl rubber is used as a material of the supporting material 12; and when the thickness of the rubber is set to 1.0mm. and the width of each partition of the honeycomb is set to 1.5-1.0mm., the supporting material 12 is moved smoothly in three, X, Y, and Z directions under good proportion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical recording device using a recording disk recorded using a laser beam.

Conventional Structure and Problems First, the general structure of laser beam recording will be explained with reference to FIG. In FIG. 1, 1 is a rotating recording disk. The recorded content is an audio signal, an image signal, or the like. Recording can be done by using a laser beam to change the reflectance of the recording surface material depending on the form of the signal, or by using a thin Aβ
Depending on the form of the signal, there is a method of punching the evaporation surface to create irregularities or holes depending on the form of the signal. During playback, the recording disk 1 is rotated, irradiated and traced with laser light in the same way as an audio record disk, and the reflected light at this time is received.

This change is converted into an electrical signal.

Reference numeral 11 denotes a laser beam, which is focused by a lens 2 on the recording surface of the recording disk 1 so as to obtain maximum efficiency during the recording/reproducing image mode. To that end, there are 9 circumferential height positions in the focal direction.

It is necessary to control the diametrical position. The height position in this control is performed by the five windings 5 and the hollow magnet 10, and the horizontal X and Y control is performed by the windings 4 and magnet 9.

In other words, by passing a control signal through the windings, a repulsive force is generated with respect to the polarity of each magnet 9, 10, driving it in the desired direction.In principle, it is the same as the voice coil of a speaker. It is.

6 and 7 are the parts targeted by the present invention, and at the same time the lens barrel that holds the lens group 2 holds the aforementioned winding bobbin 3 in the air, allowing for smooth movement based on the aforementioned principle. It supports without distortion, and often uses a leaf spring, and sometimes a rubber membrane. At present, no definitively effective shape has been obtained.

This is because the holders 6 and 7 themselves act as brakes that allow the lens system to move up and down, left and right, and back and forth according to the signals. In the case of a leaf spring, it is necessary to have a shape that allows the spring to function as if it were non-existent or evenly; however, the shape does not have any angular direction when viewed from a plane during the assembly process. It is preferable.

For example, the one shown in FIG. 2 clearly has a distinct angular orientation and requires additional assembly man-hours.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an optical recording device in which a cylinder holding an optical system can be attached without requiring extra assembly man-hours.

Structure of the Invention The present invention is an optical recording device in which a lens system for irradiating a recording disk with a laser beam is housed in a cylindrical body, and this cylindrical body is attached to a housing by a honeycomb-shaped support. Since there is no directionality in terms of appearance, the number of man-hours required to confirm the direction when assembling the device is wasted.Description of an Embodiment An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 3, the support body 12 for holding the lens system is structured in a tortoiseshell-like mesh shape. The material used is butyl rubber, the rubber thickness is 1.0 mm, and the width of each honeycomb-shaped partition is 1.5 to 1. When set to Omm, x-y-z
The result is something that moves smoothly and in a well-balanced manner in three directions. The other structures are the same as those in FIG. 1 and will therefore be omitted.

Effects of the Invention As described above, according to the present invention, the structure of the support body is honeycomb-shaped when viewed from above, so there is no need to check the directionality when supporting a cylindrical body housing a lens system. This is useful for reducing man-hours.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a conventional optical recording device, FIG. 2 is a plan view of a portion of the same device, and FIG. 3 is a plan view of a portion of the optical recording device according to an embodiment of the present invention. 2...Lens, 3...Cylinder, 12...
...Supporter - Name of agent Patent attorney Satoshi Nakao
Male and 1 other person Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] An optical recording device in which a lens system for irradiating a recording disk with laser light is housed in a cylinder, and this cylinder is attached to a housing with a honeycomb-shaped support.