SU1674237A1 - Data disk carrier optical pickup drive unit - Google Patents

Abstract

The invention relates to the field of instrumentation and can be used in equipment for recording and reproducing information from an optical disk medium. The aim of the invention is to increase the stability of the apparatus to external mechanical effects. The proposed device consists of two double-arm levers mounted on one axis rotatably, two pairs of bars, one of which is kinematically connected with the optical head and arms of the levers, the other with a counterweight and other free arms of levers. The head is mounted on a guide, the axis of which is perpendicular to the axis of rotation of the disk carrier. The gi with arms of levers form two kinematic balanced polygons (in the particular case 4 gons). Due to this, the device is highly resistant to external mechanical influences of any direction. In addition, the alignment of the axis of rotation of the levers with the axis of rotation of the disk carrier reduces the mutual displacements of the head and disk under external mechanical effects, which leads to a further increase in the stability of the device to shocks, jolts, etc. 1 hp f-ly, 3 ill.

Description

The invention relates to instrument engineering and can be used in recording equipment - reproduction of information on a disk medium.

The aim of the invention is to increase the resistance of the device to external mechanical effects and the possibility of using an optical head with a three-beam tracking system.

FIG. 1 shows a diagram of the device; in fig. 2 - the same, option; in fig. 3 - the same, in a perspective view.

The displacement device comprises a double-arm lever (shoulders 1 and 12) mounted — rotatably on axis 2; optical head 3, counterweight 4, axis 5;

disk carrier 6, double-arm lever (shoulders 71 and 72) mounted on an axis 20 ti 8 and 9, movably connected to one ends with a counterweight 4, and the other ends to the arms of levers 12 and 7, ti 10 and 11, one ends connected to the optical head 3, and the other ends to the free arms of the double-arm levers, guide 12, on which the optical head is mounted

4 with the possibility of linear movement, the axis of the guide 12 perpendicular to the axis

5back drive rotation 6.

The movement device operates as follows.

The disk carrier 6 rotates on axis 5, and the optical head 3 progressively neOs

2

GO

with VJ

moving along the guide 12 from the center of the disk carrier to its periphery, with the action of a linear motor, the optical information recorded on the carrier is read. In this case, heads 3 carry with them 10 and 11, movably connected to the head with two shoulders levers, levers turn and carry with them 8 and 9 and counterweight 4. When the direction of the linear motor changes, all elements of the kinematic scheme move in the opposite direction. The optical head then moves progressively, which makes it possible to use a three-beam head.

Since the entire kinematic system is made symmetrically about the axis 13, when moving the head there are no forces displacing the head 3 perpendicular to the axis 13, therefore the forces of the head-to-rail guide are insignificant.

When impact is applied to the case of the apparatus, the load is transmitted to the axis 2 fixed on the optical head housing, and the entire kinematic movement scheme remains stationary, the alignment of the axis 2 with the axis 5 additionally increases the resistance of the device to shocks, and their mutual displacement during cutting decreases The impact forces in this case act equally on the attachment points of both the disk carrier 6 and the optical head 3.

Claims (2)

1. A device for moving an optical head of a disk information carrier comprising a double-arm lever mounted for rotation about an axis, an optical head mounted for movement, and a counterweight, due to the fact that, in order to increase resistance to external mechanical effects, an additional double-arm lever mounted for rotation around the same axis was inserted into it, two pairs of tons and a guide for the optical head, each of the connectors is connected at one end to the arm of one of two shoulders, the free ends of one pair of tg are movably connected to the counterweight, and the other pair of tg with an optical head, the guide of the optical head is perpendicular to the axis of rotation of the disk carrier, and the product of the mass of the optical head by the sum of the lengths of one of the two-arm levers connected to it and the arm of the two shoulders connected to this pull is equal to the product of the mass of the counterweight by the sum of the lengths of the other arm of this two shoulders of the lever and connected with him ti gi. 2. Pop-1 device, characterized in that the axis of rotation of the double-arm levers is aligned with the axis of rotation of the disk carrier. 12 FIG. 2 1 FIG.