JPH03144920A - Optical disk device - Google Patents

Abstract

PURPOSE:To relax the interaction between optical heads, to miniaturize a device and to attain the reduction in weight by arranging each positioner driving each optical head so that the driving directions of the heads are directed at an optional angles not in parallel with each other. CONSTITUTION:An optical disk medium 9 is fixed to a tip of a spindle 8 stood upright in the middle of a base plate 10 and driven. A positioner rail 3 is pro vided on a side of an upper piece of a lateral L-shaped stand 4 fitted to one corner of the base plate 10 opposite to the optical disk medium 9. A positioner 2 is engaged freely slidably to the positioner rail 3, an optical head 1 is mounted to the positioner 2 and accesses a medium face 9a at the upper side of the optical disk medium 9. Moreover, a positioner rail 7 is provided on the base plate 10 so that the movable direction is nearly at a right angle to the optical head 1. A positioner 6 is engaged slidably freely to the positioner rail 7, the optical head 5 is mounted on the positioner 6 and accesses a medium face 9b at the lower side of the optical disk medium 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc device for recording and reproducing information on an optical disc medium.

[Conventional technology]

FIG. 2 shows the configuration of a conventional optical disk device equipped with two independent optical heads, in which la) is a plan view and h) is a front view.

That is, optical heads 1 and 5 face both sides of an optical disc medium 9 from above and below, which is rotated by a spindle 8 installed upright in the center of a base plate 10, and these optical heads L and 5 are moved by a positioner 2.6. It is moved and positioned in the radial direction of the optical disc medium 9, so that information can be recorded and reproduced. Note that the positioner 2 moves along a positioner rail 3 attached to a stand 4 provided on a base plate 10, and the positioner 6 moves along a positioner rail 7 attached to the base plate 10. The directions of movement of both were parallel.

[Problem to be solved by the invention]

As described above, in the conventional optical disk device, the driving directions of the positioners 2.6 that drive the optical heads 1.5 are parallel to each other, and furthermore, the optical heads 1 and 5 are connected to a magnetic disk device, etc. Since the magnetic head is heavier than the other magnetic head, the reaction force when driving the negative optical head acts on the other optical head, which poses a problem in that it adversely affects operating characteristics such as tracking.

In particular, in response to the demand for faster access, the optical head 1,
5 is driven at higher speeds, this problem becomes even more serious.

By the way, in order to improve these operating characteristics in actual optical disk devices, the weight of the fixing part is increased, which increases the weight of the device and has the disadvantage that it is not possible to make the device smaller and lighter. was there.

The present invention has been proposed in view of the above points, and its purpose is to alleviate the interaction between optical hands,
An object of the present invention is to provide an optical disc device that can be made smaller and lighter.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an optical disk device having at least two or more optical heads, each of which is provided with a driving positioner, in which the driving direction of each positioner is set to an arbitrary direction that is not parallel to each other. I try to place it at an angle.

(Function) In the optical disk device of the present invention, each positioner arranged at an arbitrary angle whose driving directions are not parallel to each other drives an optical head, and the influence of reaction force on the driving direction of other optical heads. decrease.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the constituent countries of an embodiment of the optical disk device of the present invention, in which (a) is a plan view, (b) is a view seen from the direction of arrow A of (al), and (C) is a diagram of (arrow of Ml). It is a diagram seen from direction B.

In FIG. 1, a spindle 8 is provided upright in the center of a base plate 10, and a disc-shaped optical disk medium 9 is fixed to the tip of the spindle 8 and is rotated at a predetermined speed.

On the other hand, a horizontally shaped stand 4 is attached to one corner of the base plate 10 so that one end thereof overhangs the optical disk medium 9. A positioner 2 is slidably engaged with the rail 3, and an optical head 1 is mounted on the positioner 2 so that the upper medium surface 9a of the optical disk medium 9 can be accessed.

Further, a positioner rail 7 is provided on the base plate 10 so that the movable direction is approximately perpendicular to the optical head 1. A positioner 6 is slidably engaged with the positioner rail 7, and the optical head is connected to the positioner 6. 5 is mounted so that the lower medium surface 9b of the optical disk medium 9 can be accessed. In this embodiment, the driving directions of the positioner 2 and the positioner 6 are set to be perpendicular to each other, but any angle θ that is not parallel may be used in practice.

Therefore, the optical head 1 and the optical head 5 are driven at appropriate high speeds in order to independently access the upper medium surface 9a and the lower medium surface 9b of the optical disk medium 9, but the reaction that occurs during this driving is Since the directions of the forces are perpendicular to the driving direction of the other optical head, the component forces are theoretically zero, and their influence on tracking is reduced. In addition, if the angle θ of the arrangement is set to an angle other than a right angle,
Although the effect of preventing the adverse effects of the reaction force is reduced to some extent, the component force of the reaction force that acts is the value multiplied by Co3θ, and c
Since the value of osθ does not exceed l, there is a sufficient effect compared to the conventional case of parallel arrangement.

(Effects of the Invention) As explained above, in the optical disc device of the present invention, the driving directions of the plurality of positioners that drive the optical head are arranged at arbitrary angles that are not parallel to each other. The reaction force when driving one optical head no longer acts directly in the driving direction of the other optical head, which has the effect of reducing adverse effects such as disturbing tracking.Therefore, the reaction force when driving the optical head can be reduced. This reduces the need to increase the weight of the device I1 in order to absorb it, making it possible to reduce the size and weight of the device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the optical disc device of the present invention, and FIG. 2 is a block diagram of a conventional example. In the figure, 1...... Optical head 2...
・・・・・・・・・・・・Positioner 3・・・・・・・・・
・・・・・・・・・Bojishi Pu Narail 4・・・・・・・・・
・・・・・・Stand 5・・・・・・・・・・・・・・・
・・Optical head 6・・・・・・・・・・・・・・・Positioner 7・・・・・・・・・・・・・・・Positioner rail 8・・・・・・・・・・・・・・・...Spindle 9...
......Optical disk media 9a, 9b.
・Media side

Claims (1)

[Scope of Claims] An optical disk device having at least two or more optical heads, each of which is provided with a driving positioner, in which the driving directions of each positioner are arranged at arbitrary angles that are not parallel to each other. An optical disc device characterized by: