KR950000898B1 - Deviation control apparatus for optical disk player - Google Patents

Abstract

The deviation adjusting device corrects quickly an inclination angle and height deviation caused by the disk slack and improves operation reliability. The device includes a spindle motor assembly in which the spindle motor is joined to a motor base and a turntable is inserted and fixed to a motor shaft; the main base punched for a long hole of vertical direction; a loading cam gear set on a side of the main base; a pair of moving plates assembled on the loading cam gear with a pin and having the spindle motor assembly on its upper part; a pick-up unit having a turning support part, a sliding gear and an object lens; and a cam gear for an inclination angle correction, integraly attached to a side of the pick-up unit.

Description

Deviation adjusting device according to the deflection of the disc of the double-sided optical disc player

1 is a front view showing a conventional optical disc player.

2 is a side view of FIG.

3 is a plan view illustrating in detail a conventional carriage structure.

4 is a schematic illustration of a pickup drive generally in accordance with disc deflection.

5 is a planar view showing an optical disc player structure of the present invention.

6 is a schematic front view of the present invention.

7 is a side view of the present invention showing a spindle motor assembly assembled state.

8 and 9 are examples of deviation correction states according to the operation of the present invention.

* Explanation of symbols for main parts of the drawings

1: Turntable 2: Spindle Motor

2a: spindle motor base 10: disk

20: tray 100: main base

101: vertical long hole 102: support piece

103: washer 104, 105, 143: spring

110: moving plate 111: inclined hole

112: fixing pin 113: guide pin

120: loading cam gear 121: cam curve

122: loading motor 130: turning member

131: U-shaped rack 132: pickup carriage

133: sliding gear 134: guide roller

135: sliding motor 136: objective

137: pickup means 138: tilting bar

139: hinge axis 140: cam gear for tilt angle correction

141: motor 142: upper cam curve

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided performance optical disc player (Laser Disk Player) used to continuously reproduce signals recorded on both the upper and lower sides of a disk. The present invention relates to an apparatus for adjusting a deviation of an optical disc player for double-sided reproduction, which is capable of quickly correcting an inclination angle and height deviation caused by deflection of a disc and thereby improving reliability of operation.

In general, a conventional optical disc player includes a spindle motor 2 for driving an optical disc 10 mounted on a turntable 1 at a constant speed, as shown in FIGS. 1 and 2, and on an optical disc. In order to reproduce the recorded signal, the carriage 5 which moves along the pair of eyepiece members 3 and 4 and the pickup means 6 provided in the carriage, and the carriage can be rotated for reproduction on the opposite side of the disc recording surface. It is provided with a turning means (7) having a circular fixed gear (8) and a moving guide member (9). In addition, the carriage 5 is provided with three motors including pickup means 6 for reproducing the signal recorded on the optical disc, and various parts for driving the motors.

The three motors mounted in the carriage 5 are sliding motors 53 which simultaneously transmit power to the horizontal shifting gear 51 and the turning gear 52 of the carriage 5, as shown in FIG. ), An inclination correcting motor 54 for correcting the degree of inclination of the pickup means 6 according to the deflection when the disc is rotated, and the edge of one side of the disc when the carriage 5 turns to the opposite side of the disc. It is configured as a height adjustment motor 55 for additionally correcting the height that is not sufficiently compensated by the inclination angle correction motor 54 when the inclination angle of the disk is large while preventing the phenomenon of hitting the end, and the inclination angle correction motor ( 54 allows the pickup means 6 fixed to the first case 61 to maintain the left and right inclination angles with the pins 62 and 63 protruding from both ends of the case as hinge points, and the height adjustment motor 55 ) Is picked up by the first moving member 64 The height adjustment of the means 6 is made possible.

Meanwhile, the pickup means 6 installed on the carrier 5 is formed along the horizontal movable gear 51 driven by the power of the sliding motor 53 and the pair of guide members 3 and 4. The drive of the racks 31 and 41 reads the signals recorded on the surface of the disk while moving at a constant speed from the inner circumference to the outer circumference of the disk 10. In order to break the stable signal, the recording surface of the disk 10 is read. As the following optical pickup means 6 moves, the adjustment operation must be promptly performed to obtain orthogonality between the moving track extension line of the irradiation light optical axis and the disk rotation center.

That is, the disk 10 placed on the turntable 1 permits changes of +0.9 and -1.2 mm at the end of the disk in the rotating state, and +1.5 and -2.5 mm in the stopped state. As the situation is recognized, the objective lens 6a of the pickup means 6 must always be parallel to the disk, even if the disk 10 is sag.

As shown in FIG. 4, the carriage 5 having the pickup means 6 is fixed to the guide members 3 and 4, so that the pickup means 6 itself is inclined by the inclination angle correction motor 54. As shown in FIG. It should be possible to adjust the height of the pickup means by the height adjustment motor 55 in case there is a considerable amount of deflection.

In other words, the "A" state in FIG. 4 is a position for reproducing the inside of the disc 10, and the object lens 6a of the pickup means 6 can maintain the neutral and can be reproduced without adjusting the inclination angle and height. As the carriage 5 gradually moves outward from the disk, the pick-up means 6 fixed to the carriage 5 by the hinge pins 62 and 63 in the " B " position only corrects the inclination angle without height adjustment. The objective lens 6a is tilted to correspond to the deflection angle of the disk 10 so that the correct focus is detected and reproduced. At this time, the objective lens (6a) is also fine adjustment by moving ± 1.7mm.

Then, when it reaches the "C" position, the objective lens (6a) is the hinge pins 62, 63 of the pickup means 6 is the hinge groove (5a) of the carriage 5 to maintain a constant distance from the disk 10 As the descending angle correction is made at the same time as the descending height adjustment is performed, the signal is not affected by the signal reproduction.If the disc is subjected to the above process (10a), the disc is rotated upward for the disc top surface (10b) after the playback. When the "D" position is reached, the objective lens 6a is completely inserted into the carriage 5 by using the height adjusting motor 55 so that the objective lens 6a does not come into contact with the end of the disc during turning.

However, such a conventional driving device is provided with a combination of various types of driving motors 53, 54, 55 in the carriage 5, and its structural assembly form is also very complicated. Not only does it act as a big obstacle to delay the speed and search time due to the increase in weight, but also the compensation due to the deflection of the disc is being adjusted by the internal compensation means mounted in the carriage, which makes the operation reliable due to its complexity. It was pointed out that a serious problem that greatly lowers the level.

The present invention has been made to solve such a conventional problem, the weight of the pickup means for reproducing the signal recorded on the surface of the optical disk, the height correction of the turntable and the inclination of the turning member according to the horizontal movement of the moving plate The main purpose is to provide an optical disc player that can further improve the operation reliability by making it smooth.

Another object of the present invention is to be able to perform a plurality of functions at the same time as a single motor without having to separately install a motor of various functions to further improve the miniaturization of the device and the reliability according to the operation.

Still another object of the present invention is to provide a deviation adjusting device in which the height adjustment of the turntable and the inclination angle correction of the pickup carriage can be smoothly controlled by independent cam gears, respectively.

The present invention for achieving the above object, the spindle motor assembly is coupled to the motor motor base and the turntable is fixed to the motor shaft, and the support piece having a pair of support pieces on both sides said And a loading cam gear having a main base bored in a vertical long hole so that the spindle motor assembly can be guided up and down, a cam curve installed on one side of the main base and gradually moving away from the center about the fixed shaft; Pinned to the loading cam gear for horizontal movement, the spindle motor assembly is mounted on the upper side, and the inclined long holes are formed on both sides to intersect the vertical long holes of the main base, respectively, and the position of the pins caulked at the intersection of the long holes Main base with a pair of moving plates for guiding the motor assembly and a U-shaped rack on the inner surface A turning member installed on the pick-up member, and having a sliding gear on one side so as to be guided along the U-shaped rack of the turning member, and having an objective lens mounted on the upper surface thereof, and an inclination angle of the pick-up means according to the deflection degree of the disk. Characterized in that it comprises a cam gear for tilt angle correction that is integrally attached to one side of the pickup means to compensate.

Hereinafter, the present invention will be described in detail with reference to the embodiments of the accompanying drawings.

5 is a planar view of the present invention in which the height adjustment of the turntable and the inclination correction of the pickup carriage are sequentially performed, and FIG. 6 is a front view of the present invention as described above, and the deviation adjusting device of the present invention is a turntable. With a height correction device installed on the main base to smoothly move the position of the disk mounted up and down, and an inclination angle correction device provided at one end of the pickup carriage to adjust the inclination angle of the pickup means moving up and down along the turning member It is made, the height correction device is configured to be sequentially operated by the moving plate.

In other words, the spindle motor 2 is coupled to the spindle motor base 2a and the turntable 1 is inserted into the motor shaft to fix the spindle motor assembly, thereby completing the spindle motor assembly. The long holes 101 in the direction are assembled to both support pieces 102 of the main base 100, each of which is perforated, and at the same time, the inclined long holes 111 are intersected with the vertical holes 101 outside the support pieces 102. Assembling the perforated moving plate 110, and then fastened to the motor assembly using the fixing pin 112 so that both the vertical long hole 101 and the inclined long hole 111 passes. At this time, the washer 103 and the compression spring 104 are interposed between the spindle motor base 2a and the support piece 102 of the main base 100 so that friction reduction and gap compensation due to the transfer can be made. The bottom transient spring 105 of the base 100 is extended so that the spindle motor assembly can always be returned to a fixed position.

And a guide pin which protrudes from the moving plate 110 in the cam curve 121 of the loading cam gear 120 while laying a loading cam gear 120 having a desired cam curve 121 on one side of the motor assembly ( 113 is inserted so that the moving plate 110 equipped with the motor assembly according to the rotation of the loading cam gear 120 performs a linear reciprocating motion.

In other words, when the moving plate 110 moves horizontally according to the operation of the loading cam gear 120, the fixing pin 112 guided along the inclined long hole 111 is formed of the support base 102 of the main base 100. Lifting and moving the motor assembly to the height overlapping the vertical hole 101 it is possible to prevent the separation of the disk 10 and height adjustment.

On the other hand, the pickup carriage is inserted into the inner surface of the U-shaped rack 131 is fixed to the main base 100, so as to move along the guide bar (not shown) installed in parallel with the U-shaped rack 131. A sliding gear 133 and a guide roller 134 are installed at one side of the pickup carriage 132. The pickup carriage 132 also includes a pickup means 137 including a sliding motor 135 and an objective lens 136 and an inclination of the pickup means 137 at a predetermined angle so as to sag onto the disc 10. In order to compensate the degree of inclination, the inclination angle correction cam gear 140 is retained on one side of the pickup carriage 132, respectively, due to the driving of the motor 141 is installed inclination angle correction cam gear 140 is When the rotation of the pick-up means 137 by the tilting bar 138 of the pick-up means 137 that is supported by the spring 143 to be regulated by the upper cam curve 142 of the inclination angle correction cam gear 140 The rotational motion about the hinge axis 139 is shown, thereby inclination angle correction.

According to the present invention configured as described above, when the disk 10 is mounted in the tray 20 in the same manner as the drive using the conventional mechanism, the tray 20 has completed the horizontal movement by the loading mechanism. After the vertical movement, as shown in FIG. 6, the disk 10 is seated on the turntable 1 and moved further in the vertical direction to separate the disk 10 from the tray 20.

Then, when driving the loading cam gear 120 by transmitting power to the loading motor 122, the guide pin 113 of the moving plate 100 assembled in the cam curve 121 of the loading cam gear 120 is The moving plate 110 starts to move gradually away from the fixed shaft along the cam curve 121 so that the moving plate 110 can be changed from side to side and is caulked to the inclined long hole 111 of the moving plate 110 by this operation. In accordance with the movement of the fixing pin 11 penetrating the vertical slot 101 of the support main body 100 of the sieve main base 100, the spindle motor 2 in which the turntable 1 is mounted on the motor shaft is vertically oriented. It is to exercise.

Subsequently, the spindle motor 2 is rotated at a constant speed by setting the play selection mode to play the songs recorded on the disc 10. That is, when the spindle motor 2 rotates, the turntable 1 rotates together with the spindle motor 2, and the pickup means 137 on which the object land 136 is mounted is mounted inside. By the operation of the sliding motor 135, the U-shaped rack 131 provided on one side of the main base 100 and the sliding gear 133, while proceeding to engage the sequential from the inner side to the outer side of the lower surface of the disk 10 The playback signal is read out. However, if the disk 10 sags due to its own weight during reproduction, the accurate focus detection between the object lens 136 and the disk 10 of the pickup means cannot be achieved by the normal horizontal movement of the pickup means 137. This ultimately prevents the signal from being read.

Therefore, when the inclination angle is to be corrected according to the deformation degree of the disc 10, the inclination angle correction cam gear 140 is rotated to the left and right to adjust the pickup means 137 installed around the hinge axis 139 to the left and right. In order to correct the height between the pickup unit 137 and the pick-up unit 137, the moving plate 110 interlocked with the loading cam gear 120 allows the entire motor assembly to be vertically moved to smoothly adjust the height. To ensure that

6 shows a state in which the adjusting device of the present invention is in a neutral position.

In such a state that the deformation is not applied to the disk 10, the turntable 1 is rotating the disk 10 at a desired neutral position, and the pick-up means 137 also tilts at the neutral position of the cam gear 140 for tilt angle correction. The bar 138 is located, so that the most ideal correction position is secured so that the objective lens 136 and the disk 10 can maintain a right angle. 8 and 9 show a state in which the disk 10 is bent downwardly or upwardly by bending deformation, respectively.

In other words, when the disk 10 is struck downward, the curved end of the disk 10 does not maintain a proper distance from the object lens 136 of the pickup means 137, so that it is difficult to detect the focus. In order to maintain the desired spacing, the turntable 1 is upwardly adjusted, and the pick-up means 137 is tilted outward to correct the height and the inclination angle according to the sag. This deviation correction is performed by the U-shaped rack of the turning member 130. The objective lens 136 of the pickup means 137, which slides along 131, is made at the same time as the signal recorded on the disk 10 is reproduced.

This method of correction is no exception even when the disk 10 is bent upwards. At this time, the loading cam gear 120 and the inclination angle correction cam gear are made by reproducing the planar section of the disk 10 as shown in FIG. 9 and detecting a curved state of a sensor (not shown) provided in the pickup means 137. By driving the 140, respectively, it is possible to smoothly adjust the turntable 1 and the pickup means 137 to the desired height and inclination angle, respectively.

As described in detail above, a tilt angle correction device is provided in a motor assembly having a turntable to compensate for deviation caused by deflection of the disk, and each tilt angle compensation means is provided in the pickup carriage to compensate the tilt angle of the disk. The present invention is configured to effectively prevent the malfunction during regeneration caused by the inclination angle and the height deviation, and in addition to the unique turning method with a lighter pick-up carriage, a reliable operation is achieved even by relatively small movement due to the self-lift of the turntable. It can be expected and further reduce the weight of the device, which can significantly reduce the speed of search and motor power consumption, which can provide a number of advantages, such as beneficial to the low-cost configuration of the whole mechanism.

Claims (2)

Spindle motor assembly in which the spindle motor is coupled to the motor base and the turntable is fixed to the motor shaft, and on the support piece having a pair of support pieces on both sides, the spindle motor assembly can be vertically guided up and down. The main base punched the long hole, the loading cam gear which is installed on one side of the main base and has a cam curve gradually moving away from the center around the fixed shaft, and is assembled by the pin to the loading cam gear for horizontal movement. A pair of moving plates mounted on the upper part of the spindle motor assembly and guiding the motor assembly to the position of pins caulked at the intersections of the long holes by forming inclined long holes on both sides thereof so as to intersect the vertical long holes of the main base; Turning member is installed on the main body having a U-shaped rack on the inner surface, and the U-shaped of the turning member The pickup means has a sliding gear on one side so as to be guided along the rack, and is mounted on one side of the pickup means to compensate the inclination angle of the pickup means according to the deflection of the disk. Discharging device according to the deflection of the disc of the optical disc player for double-sided play, characterized in that the cam gear for tilt angle correction. According to claim 1, wherein the pickup means connected to the hinge shaft to the pickup carriage, both sides characterized in that the inclination adjustment of the sieve pickup is regulated by the upper cam curve of the cam angle correction cam gear installed on one side Deviation adjusting device according to the deflection of a disc of a reproducing optical disc player.