KR960007893B1 - Pick-up transfer apparatus of optical disk player - Google Patents

Abstract

The pick-up transfer apparatus is designed to eliminate back lash of the engagement between a feeding gear and a feeding rack. The apparatus comprises the feeding rack(18) geared with a feeding gear(24), a bracket(20) separated from the feeding rack, an elastic member(32) having elasticity in the direction perpendicular to the feeding direction of pick-up device(14), a supporting pin(34) which always contacts with the elastic member(32), and a deviation preventing pin(36) protruded on the rear side of the feeding rack(18) to prevent separation from the bracket(20).

Description

Pickup transfer unit of optical disc player

1 is a perspective view showing a pickup transfer mechanism of a conventional optical disc player.

2 is a plan view of FIG.

3 is an overall perspective view of a pickup transport apparatus according to the present invention.

4 is a partial perspective view of FIG.

5 is a plan view of FIG.

* Explanation of symbols for main parts of the drawings

14: pickup device 18: transfer rack

20: Bracket 24: Feeding gear

32: elastic member 34: support pin

36: release prevention pin 38: pin insertion groove

The present invention relates to a pickup transport apparatus of an optical disc player, and more particularly, to improve an installation structure of a transfer rack coupled to one side of a pickup apparatus, thereby eliminating a backlash phenomenon during a pickup operation. The present invention relates to a pickup transport apparatus for an optical disc player.

In general, an optical disc player such as a laser disc player or a compact disc player has a linear movement in a radial direction from the vertical downward of the disc while the disc is rotated at a predetermined speed while the disc is mounted on the turntable according to the loading operation of the tray. A pickup device is provided which reads out information recorded on the disc in such a manner as to irradiate a laser beam on the recording pit and to detect a signal of the laser beam reflected on the recording pit.

As shown in FIG. 1, the transfer mechanism of the pickup device includes a pickup device 14 fitted to the guide rod 16 on a transfer path on the deck 12 installed below the turntable 10. On one side of the pick-up device 14, a bracket 20 having a conveying rack 18 having a length corresponding to the conveying length is coupled by a screw 22, while the conveying rack 18 is installed. On the deck 12, the feed gear 24 meshing with the feed rack 18, a feeding motor 26 for imparting a driving force to the feed gear 24, the feeding motor 26 and the feed gear ( It is formed between the 24 and the feeding means 30 is composed of a motor gear group 28 is provided between the transmission gear 24 to transfer the power of the feeding motor 26.

However, in the pickup mechanism transfer mechanism having such a conventional structure, since the transfer rack 18 is integrally formed at one end of the bracket 20, the disc is radially picked up by the pickup device 14 according to the rotation of the transfer gear 24 in place. When the linear movement in the direction, the backlash phenomenon occurs that the gears on the feed gear 24 and the feed rack 18 is not in engagement with each other, resulting in a poor transfer operation of the pickup device 14 as well as a regeneration operation. There was a problem.

Accordingly, in recent years, when the bracket 20 on which the transfer rack 18 is formed is coupled to one side of the pick-up device 14, the screw 22 of the mounting portion is not firmly tightened, but the screw 20 is loosely tightened to transfer the bracket 20 to the transfer rack 18. When the engagement between the transfer gear 24 occurs, the transfer rack 18 has a slight tension to prevent the backlash phenomenon, in this case there is a difference in the degree of tightening the screw 22 for each worker There was a problem that the quality is not constant.

In addition, since the conventional transfer rack 18 is integrally formed with the bracket 20, there is a problem that the entire bracket 20 needs to be replaced when the transfer rack 18 is damaged by an external impact.

The present invention is to solve such a conventional problem, is installed on one side of the pick-up device, meshed with the feed gear constituting the feeding means and the linear movement in the radial direction of the disk in accordance with the rotation operation of the feed gear The rack is separated from the bracket, but an elastic member acting in a direction orthogonal to the conveying direction is installed at a predetermined position on the upper surface of the bracket, and a support pin supported by the elastic member is attached to the rear end of the conveying rack, and is coupled to the bracket. By forming a release preventing pin that prevents from falling off, it is possible to effectively eliminate the backlash phenomenon generated at the engagement portion when the transfer gear and the transfer rack are engaged with each other, and improve the repairability of the transfer rack. An object of the present invention is to provide a pickup transport apparatus for a new type of optical disc player. Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 3 and FIG. 4, the present invention is installed on one side of the pickup device 14 applied to the optical disc player, and the transfer gear constituting the feeding means 30 on the deck 12 ( 24 is separated from the bracket 20 by a transfer rack 18 which is linearly moved back and forth in the radial direction of the disk according to the rotational direction of the transfer gear 24 while being engaged with the bracket 20, but at a predetermined position on the upper surface of the bracket 20. An elastic member 32 which is elastically acting in a direction orthogonal to the conveying direction of the pick-up device 14, and an elastic member 32 provided on the bracket 20 at a predetermined position at the rear end of the conveying rack 18; It is characterized in that the support pin 34 is always in contact with the release prevention pin 36 to prevent the departure from being coupled on the bracket 20.

In the present invention as described above, the bracket 20 is a pin insertion groove that can be inserted from the top in the position corresponding to the support pin 34 and the escape prevention pin 36 protruding from the rear end of the transfer rack 18 ( 38) has a formed structure.

In the present invention as described above, the elastic member 32 installed on the upper surface of the bracket 20 may be a rubber having a leaf spring or coil spring or elasticity.

Such action of the present invention is as follows.

As shown in FIG. 5, when the feed gear 24 constituting the feeding means 30 is rotated in place under the driving force of the feeding motor 26, the feed rack 18 is rotated by the feed gear 24. In this case, the support pins 34, which protrude from the rear end of the conveying rack 18 and are inserted into the upper surface of the bracket 20 and are in contact with the elastic member 32, are pressed toward the pickup device. Accordingly, the backlash phenomenon of the engagement portion between the transfer gear 24 and the transfer rack 18 does not occur.

At this time, when the transfer rack 18 is pushed out by the elasticity of the elastic member 32, the release preventing pin 36 installed at the rear end of the transfer rack 18 is caught by the rear end of the pin insertion groove 38 on the bracket 20. While the separation of the transfer rack 18 is prevented.

When the present invention is applied, the backlash phenomenon is eliminated at the portion where the transfer gear and the transfer rack are engaged by the action of the elastic member mounted on the bracket 20 on which the transfer rack is fitted, so that the transfer operation of the pickup is stabilized. Therefore, when the bracket is installed on the pick-up device, the product can be uniformly tightened without loosely tightening the screw, so that the product becomes uniform. Since it can be replaced by the repair work efficiency and economic efficiency is significantly improved.

Claims (5)

It is installed on one side of the pick-up device 14 applied to the optical disc player, and in the rotational direction of the feed gear 24 in engagement with the feed gear 24 constituting the feeding means 30 on the deck 12. Accordingly, the transfer rack 18, which is linearly moved forward and backward in the radial direction of the disk, is separated from the bracket 20, and is elastic in a direction orthogonal to the transfer direction of the pickup device 14 at a predetermined position on the upper surface of the bracket 20. An actuating elastic member 32 is installed, and at the rear end predetermined position of the transfer rack 18, a support pin 34 which is always in contact with the elastic member 32 installed on the bracket 20, and on the bracket 20 Pick-up transfer device of the optical disc player, characterized in that the protrusion is prevented from the separation from the state coupled to the pin (36). The method of claim 1, wherein the bracket 20 is a pin insertion groove 38 is formed in a position corresponding to the support pin 34 and the escape prevention pin 36 protruding from the rear end of the transfer rack 18, respectively. Pick-up and transfer device for an optical disc player. The pickup and transfer device of an optical disc player according to claim 1, wherein the elastic member is a leaf spring. The pickup and transfer device of an optical disc player according to claim 1, wherein the elastic member is a coil spring. The pickup and transfer device of an optical disc player according to claim 1, wherein said elastic member is made of rubber.