KR100282664B1 - Pickup unit feeding device for optical disc player - Google Patents

Abstract

The present invention discloses a pickup unit feeding device of an optical disc player. The present invention includes a base on which a turn table on which an optical disk is mounted is located; A guide shaft fixed at both ends on the base; A pickup unit slidably seated on the base and having an objective lens positioned on an upper surface thereof; It is integrally formed in the pick-up unit and inserted into the guide shaft so as to be slidably inserted therein. A rack is formed on an outer surface thereof, and a first incision groove is formed at a predetermined width at a position corresponding to the spaced portion of the guide shaft. A guider having second and third incision grooves formed on the front and rear surfaces of the first incision groove; A first spring interposed between the first cutout grooves to apply an elastic force to the pickup unit in a direction corresponding to the transfer direction; Second and third springs interposed between the second and third incision grooves to apply elastic force to the pickup unit in a direction perpendicular to the conveying direction; Located in the lower portion of the base, the rack and the pinion which is engaged with the axially supported feeding motor; including, in the transport direction and the direction perpendicular to the pickup unit that can be generated in the process of adjusting the angle of the pickup unit By compensating for the change of the engagement state between the gears due to the displacement of the gear through the springs provided in the plurality of cutout grooves formed in the guider, it is possible to always maintain a stable engagement state between the gears. Therefore, it is possible to achieve a stable feeding operation of the pickup unit, which has the advantage of further improving the reliability of the optical disc player employing it.

Description

Pickup unit feeding device for optical disc player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk player, and more particularly, to a pickup unit feeding device for stably transporting a pickup unit for recording / reproducing from an optical disk. .

In general, an optical disc player includes a loading unit in which a tray is loaded, a pick-up unit that scans a laser beam toward an optical disc, and reads information through a beam reflected therefrom, A feeding unit for slidingly transporting the pickup unit in the radial direction of the optical disk, and a chucking unit for seating and clamping the disk on the turn table.

In the optical disc player having such a configuration, in particular, the feeding of the pickup unit, that is, the sliding conveyance, is one of the very important elements because it is for precise recording and reproduction from the optical disc.

Fig. 1 shows a pickup unit feeding device applied to such a general optical disc player.

This means that an optical disk (not shown) seated on a turn table T shown in phantom is a laser beam scanned from a laser diode (not shown) in the pick-up unit 1. An objective lens 1a is provided for focusing so as to focus on the recording surface.

One side of the pickup unit 1 is slidably supported by the support 2a provided on the base 2, and the other side thereof is supported by the supporter 2b provided on the base 2. Both ends thereof are supported by 2c), and a guider 4 extends to be slidably inserted into a guide shaft 3 separately formed to be spaced a predetermined distance apart.

At this time, the rack (4a) is formed on the outer surface of the guider (4) is engaged with the pinion (5) rotated by the feeding motor (M), the upper surface is formed with a cutting groove (4b) in a predetermined width to make this incision The spring 6 is interposed on the groove 4b.

In the conventional feeding device configured as described above, the pick-up unit 1 is provided in the radial direction of the optical disc through the pinion 5 which is driven by the feeding motor (not shown) and the rack 4a of the guider 4 engaged therewith. The recording is reproduced from the optical disc while being slid and transferred to the optical disc.

At this time, the spring 6 provided on the cutout groove 4b of the guider 4 during the transfer process of the pickup unit 1 regulates the engagement between the pinion 5 and the rack 4a, for example, the pickup unit 1. It prevents the backlash generated during the transfer process, so that the interlocking is made stable.

However, in such a pickup unit feeding device, the gear restraint in the conveying direction of the pickup unit 1 through the spring 6 interposed on the cutting groove 4a of the guider 4, namely, the pinion 5 and Although the regulation between the racks 4a can be performed to a certain degree of stability, a problem arises in that regulation in a direction perpendicular to the conveying direction of the pickup unit 1 cannot be made.

Such a problem arises because it does not properly solve this when the interaxial distance between gears is changed in the process of tilting the pickup unit 1.

That is, the distance between the gear, that is, the pinion 5 and the rack 4a is generated in the process of tilting the pick-up unit 1, and when the distance between them increases, the meshing rate is lowered and stable conveyance is achieved. On the contrary, when the distance between each other becomes narrow, a large load is applied to the drive system, which makes it difficult to accurately position the pickup unit.

The present invention has been made to solve such a conventional problem, and an optical disk capable of stably carrying out the bite ratio and position control between gears in the transfer direction of the pick-up unit and in the direction perpendicular to the transfer direction. It is an object of the present invention to provide a pickup unit feeding device of a player.

1 is a plan view conceptually illustrating a typical optical disc player;

2 is a plan view of main parts of an optical disk player employing a pickup unit feeding device according to the present invention;

3 is a block diagram conceptually showing an operating state of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: base 11: turntable

20: guide shaft 30: pickup unit

31: objective lens 40: guider

41: rack 42, 43, 44: first, second, third incision groove

50,60,70: 1st, 2nd, 3rd spring 80: Feeding motor

81: pinion

In order to achieve the above object, a pickup unit feeding device of an optical disc player according to the present invention includes: a base on which a turn table on which an optical disc is seated is located; A guide shaft fixed at both ends on the base and separated from each other by a predetermined distance; A pickup unit having one end slidably mounted on the base and having an objective lens positioned on an upper surface thereof; It is formed integrally extending to the other side of the pickup unit is inserted into the guide shaft so as to be slidably inserted, the outer surface is formed with a rack, the first incision groove in a predetermined width at a position corresponding to the spaced portion of the guide shaft It is formed, the guider formed with the second and third incision grooves on the front, rear surface around the first incision groove; A first spring interposed between the first cutting grooves of the guider to apply an elastic force to the pickup unit in a direction corresponding to a sliding conveying direction; Second and third springs interposed between the second and third incision grooves of the guider to apply elastic force to the pickup unit in a direction perpendicular to the sliding conveyance direction; Located at the bottom of the base, the rack and the pinion is meshed with the pinned feeding motor; characterized in that it comprises a.

Hereinafter, a preferred embodiment of a pickup unit feeding apparatus of an optical disc player according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a plan view of a pickup unit feeding device according to the present invention, Figure 3 is a configuration diagram conceptually showing the engagement state between the rack and the pinion of the guide unit in the pickup unit feeding device according to the present invention.

As shown therein, the pickup unit feeding apparatus of the optical disc player according to the present invention has a base 10 on which a turn table 11 on which an optical disc (not shown) is seated is located. do.

Both ends of the guide shaft 20 are fixed on one side of the base 10, and in particular, intermediate portions of the guide shaft 20 are separated from each other by a predetermined distance.

On the other hand, a pickup unit 30 having an objective lens 31 is provided on one side surface as recording and reproduction is performed from the optical disk seated on the turn table 11, and the pickup unit 30 is provided. One side of the support is slidably seated on the base 10, the other side is formed with a guider (guider; 40) is extended.

The guider 40 has a rack 41 formed on an outer surface thereof, and a first cut groove 42 in the conveying direction of the pickup unit 30 is formed on an upper surface thereof.

In addition, second and third cutting grooves 43 and 44 are formed at the front and rear sides of the first cutting groove 42 in a direction perpendicular to the transfer direction of the pickup unit 30.

The first cutting groove 42 is interposed with a first spring 50 to impart an elastic force to the pickup unit 30 in a direction corresponding to the sliding transfer direction thereof, and the second and third cutting grooves 43 and 44. The second and third springs 60 and 70 for imparting an elastic force to the pickup unit 30 in a direction perpendicular to the transfer direction thereof are interposed therebetween.

On the other hand, the feeding motor 80 is positioned as a driving source for the transfer of the pickup unit 30 in the lower portion of the base 10 described above, and the feeding motor 80 is engaged with the rack 41 of the guider 40. The pinion 81 is axially supported.

Referring to the operation of the pickup unit feeding device of the optical disk player according to the present invention having such a configuration as follows.

The pickup unit 30 slides in the radial direction of the optical disc through the rack 41 of the pinion 81 rotated by the feeding motor 80 and the guider 40 engaged therewith while recording from the optical disc. Will play.

At this time, the first spring 50 provided on the first cutting groove 42 of the guider 40 in the transfer process of the pickup unit 30, the pinion 81 in the same direction as the sliding transfer direction of the pickup unit 30. ) And the engagement between the rack (41).

That is, to prevent backlash between the gears that may occur in the transfer process of the pickup unit 30 to achieve a stable transfer.

Meanwhile, through the second and third springs 60 and 70 interposed on the second and third incision grooves 43 and 44 formed in a direction perpendicular to the first incision groove 42, the pickup unit 30 This engagement between the pinion 81 and the rack 41 in the direction perpendicular to the conveying direction is regulated.

That is, the pickup unit 30 is to adjust the angle appropriately according to the eccentricity between the turntable 11 and the optical disk seated thereon, as shown in FIG. The unit 30 and the guider 40 integrally formed therewith are variable in the direction indicated by the arrow.

In this way, the engagement state between the pinion 81 and the rack 41 is variable, but through the second and third springs 60 and 70 interposed in the second and third incision grooves 43 and 44 to properly compensate for this. By optimizing the interlocking state of each other.

More specifically, as shown by arrow A in FIG. 3, when the pickup unit 30 is changed upwardly perpendicular to the conveying direction, the second and third springs 60 and 70 are racked by a variable amount. The force for pressing the 41 to the pinion 81 is exerted, thereby maintaining the initial interaxial distance to maintain the same engagement.

In addition, as shown by the arrow B, when the pickup unit 30 is changed downwardly perpendicular to the conveying direction, the second and third springs 60 and 70 are compressed, and as a result, the rack 41 and the pinion ( The engagement state of the 81 is maintained as the initial state, and as a result, a stable sliding conveyance of the pickup unit 30 is achieved.

As described above, according to the pickup unit feeding apparatus of the optical disc player according to the present invention, the gap between the gears due to the transfer direction and the displacement in the direction perpendicular to the pickup unit that may occur in the process of adjusting the angle of the pickup unit; By compensating for the change of the engagement state through the springs provided in the plurality of cutout grooves formed in the guider, it is possible to always maintain a stable engagement between the gears.

Therefore, it is possible to achieve a stable feeding operation of the pickup unit, which has the advantage of further improving the reliability of the optical disc player employing it.

Claims (1)

A base on which a turn table on which an optical disk is mounted is located; A guide shaft fixed at both ends on the base and separated from each other by a predetermined distance; A pickup unit having one end slidably mounted on the base and having an objective lens positioned on an upper surface thereof; It is formed integrally extending to the other side of the pickup unit is inserted into the guide shaft so as to be slidably inserted, the outer surface is formed with a rack, the first incision groove in a predetermined width at a position corresponding to the spaced portion of the guide shaft It is formed, the guider formed with the second and third incision grooves on the front, rear surface around the first incision groove; A first spring interposed between the first cutting grooves of the guider to apply an elastic force to the pickup unit in a direction corresponding to a sliding conveying direction; Second and third springs interposed between the second and third incision grooves of the guider to apply elastic force to the pickup unit in a direction perpendicular to the sliding conveyance direction; Located at the bottom of the base, the rack and the pinion is meshed with the pinning feeding shaft motor; pickup unit feeding apparatus of the optical disc player, characterized in that it comprises a.