KR0147663B1 - Optical disk reproducing apparatus - Google Patents

Abstract

According to the present invention, an optical disc reproducing device having a deck member 45, an optical pickup means 38, an optical pickup drive means 40 for advancing and retreating the optical pickup means 38, and a disc drive means 35. An apparatus comprising: a base member (37) on which said disc drive means (35) is held so as to be able to variably fix said disc drive means (35) to said deck member (45); An elastic member (36,52) disposed between the deck member (45,51) and the base member (37); There is provided an optical disc reproducing apparatus, comprising adjustment means (43, 44) capable of deforming the shapes of the elastic members (36, 52). In the optical disc reproducing apparatus according to the present invention, the relative position adjustment between the disc and the optical pickup apparatus is performed by the leaf spring and the adjusting screw, which is very easy.

Description

Optical disc playback device

1 is a state diagram showing a position adjusting mechanism of the optical pickup device according to the prior art.

2 is a plan view of an optical disk reproducing apparatus according to the present invention.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2.

4 is a cross-sectional view taken along the line BB ′ of FIG. 2.

5 is a cross-sectional view taken along the line BB 'of FIG. 2 in another embodiment according to the present invention.

* Explanation of symbols for main parts of the drawings

11: optical pickup device 21: pickup carrier

15: lever 26: cam

24: motor 35: spindle motor

36: leaf spring 38: optical pickup device

43,44: screw 46: bending part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing apparatus, and more particularly, to an optical disk apparatus capable of adjusting the inclination angle of the spindle motor by being formed integrally or by using a separate leaf spring member.

An optical disc reproducing apparatus is a device for reproducing an information signal recorded on a disc using a laser, and includes an optical disc player, a compact disc player, and the like, which have recently been spotlighted as information recording apparatuses. In the operation of the optical disk reproducing apparatus, the disk is loaded and rotated on the spindle motor, and the photodiode as the light receiving element detects that the laser irradiated from the laser diode as the light emitting element installed in the optical pickup device is reflected by the pit formed on the disk. . In such an optical disk recording / reproducing apparatus, the relative position of the disk rotating by the spindle motor and the optical pickup apparatus has a very important meaning in signal reproduction. This is because the signal quality depends on the distance and angle at which the laser is incident on the pit formed on the disk surface. Therefore, there is a need to control the state in which the optical pickup device or spindle motor is installed on the deck.

1 is a perspective view showing the adjustment of the position of the optical pickup device in the prior art. The optical pickup device 11 moves on the surface of the disc in a state where it is installed in the pickup carrier 21, and a lever 15 is provided on the side to control the position of the optical pickup device 11, and on the other side The cam 26 controlled by the motor 24 is provided. The pick-up carrier 21 is advanced or retracted along the guide shaft 22 to the surface of the disc, which is defined as a radial direction since the forward and backward of the pick-up carrier coincides with the radial direction of the disc, and is perpendicular to the radial direction. Can be defined in the tangential direction. The optical pickup device 11 has a moving pin 12, a rotating pin 13, and a sliding pin 14 on the side. The rotary pin 13 of the optical pickup device 11 is coupled to a bearing 29 formed on one side of the upper portion of the pickup carrier 21, the moving pin 12 is in contact with the groove 17 formed in the lever 15 Stays in the state. The lever 15 has a rotating pin 18 formed on the side thereof, which is coupled to the bearing 28 of the pickup carrier 21. The screw 19 is coupled to the screw groove 31 of the pickup carrier 21 via a screw hole 20 formed in the lever 15. The spring 32 also connects between one end of the lever 15 and the latch 23 of the pickup carrier 21. The sliding pin 11 of the optical pickup device 11 is linked to the cam 26 controlled by the motor 24. Cam 26 is a curved groove formed on the surface of the cylinder, the sliding pin 11 is connected to the groove of the cam 26. The rotation of the motor 24 is transmitted to the worm gear 27 of the cam 26 via the worm gear 25.

The adjustment of the optical pickup device in such a device is made in two ways. First, the tangential position of the optical pickup device 11 is adjusted by adjusting the engagement degree of the screw 19 with respect to the pickup carrier 21. This is because the rotating pin 18 of the lever 15 is supported by the bearing 28 and a tension force of the spring 32 is applied to one end, so that the lever 15 is rotated by the screw 15 when the screw 19 is tightened or released. It rotates around the position of the optical pick-up device in which the moving pin 12 is caught in the groove 17 of the lever 15 is changed.

While the above adjustment is made at the time of manufacture of the optical disc reproducing apparatus, the adjustment in the radial direction is made during the operation of the optical pickup apparatus. That is, when the detection means detects that the optical pickup device is inclined in the radial direction, a signal for compensating the detection signal is input to the motor 24, and the worm gear 25 and the worm gear ( 27 is followed by rotation of the cam 26. Rotation of the cam 26 moves the sliding pin 14 of the optical pickup apparatus 11, and the optical pickup apparatus 11 can be adjusted in the radial direction.

Such an optical pickup apparatus has some problems, although the tangential direction adjustment of the optical pickup apparatus performed at the time of manufacture of the optical disk reproducing apparatus and the servo control performed during the operation of the apparatus are performed in parallel.

The biggest problem is the complexity of the device structure. That is, the number of parts required only for the position control of the optical pickup device is about 50 or more, and in particular, since the pickup carrier is required, the weight of the device increases in volume. If the weight of the optical pickup device increases, it is difficult to convey it at high speed. In addition, there is a risk of failure due to the complexity of the structure, there is a disadvantage that the repair is not easy in case of failure.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical disk reproducing apparatus that can adjust the relative position between the optical pickup device and the disk by adjusting the installation angle of the spindle motor to which the optical disk is loaded. do.

It is another object of the present invention to provide an optical disk reproducing apparatus which can be formed integrally or adjust the installation angle of the spindle motor through a separate leaf spring member.

In order to achieve the above object, according to the present invention, a deck member, an optical pickup means provided in the deck member, an optical pickup drive means for advancing or reversing the optical pickup means, and the deck member so as to rotationally drive the disc. An optical disc reproducing apparatus having a disc drive means provided below the base, comprising: a base member on which the disc drive means is held so as to variably fix the disc drive means to the deck member; An elastic member disposed between the deck member and the base member; An optical disc reproducing apparatus is provided, comprising adjustment means capable of deforming the shape of the elastic member.

According to another feature of the invention, the bending member is formed in the elastic member.

According to another feature of the invention, the position of the bent portion is three positions rotated 90 degrees and 180 degrees from the circumferential position of the optical pickup means forward and backward in the virtual circle around the rotation axis of the disk drive means Is placed in position.

According to another feature of the invention, the elastic member is formed integrally with the deck member in a state extending in parallel with a predetermined height spaced apart from the deck member.

According to another feature of the invention, the position of forming the elastic member is three places rotated 90 degrees and 180 degrees from the circumferential position of the optical pickup means forward and backward in a virtual circle around the rotation axis of the disk drive means Is placed in the position of.

According to another feature of the invention, the adjusting means is a screw that can be screwed into the deck member through a hole formed in the bent portion of the base member and the elastic member.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the drawings.

2 shows a schematic plan view of the optical disc reproducing apparatus according to the present invention. In operation of the device, the disk (not shown) is rotated at high speed with the spindle motor 35 loaded, and the optical pickup device 38 is advanced and retracted in the radial direction of the disk along the guide shaft 39. . The forward and backward of the optical pickup device 38 is made by driving the rack gear 42 with the motor 40.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2. As shown in FIG. 2 and FIG. 3, the spindle motor 35 is installed under the deck base 45. As shown in FIG. The spindle motor 35 is fixed to the deck base 45 by the adjusting screws 43 and 44 with the motor base 37 and the leaf spring 36 interposed therebetween. Two screws 43 are provided for adjusting the installation angle of the spindle motor 35 in the tangential direction (the direction perpendicular to the forward and backward direction of the optical pickup device 38). The screw 43 is fixed to the deck base through the hole in the bend formed in the leaf spring as will be described later. The position of the bending part to which the screw 43 is coupled is 90 in a clockwise and counterclockwise direction from the circumferential position where the optical pickup device 38 moves forward and backward in a imaginary circle about the axis of rotation of the spindle motor 35. It is preferred to be in the rotated position. On the other hand, the screw 44 is for adjusting the installation angle of the spindle motor 35 in the radial direction, one is installed. The screw 44 is also fixed to the deck base 45 through a hole formed in the bent formation of the leaf spring 36 as will be described later. The position of the bending part to which the screw 44 is coupled is a place which rotated 180 degrees from the circumferential position to which the optical pickup apparatus 38 advances back and forth in the imaginary circle centered on the rotating shaft of the spindle motor 35. As shown in FIG. 2, the area of the leaf spring 36 is smaller than that of the motor base 37, but is preferably wide enough to adjust the position of the spindle motor 35. As shown in FIG.

4 is a cross-sectional view taken along the line BB ′ of FIG. 2. As can be seen in FIG. 4, the leaf spring 36 has a bent portion 46 at the portion at which the adjustment screw 44 is engaged. The bending part 46 bends the flat leaf spring 46 as shown in the figure so that a predetermined distance is formed between the deck base 45 and the motor base 37. The adjusting screw 44 is screwed to the deck base 45 through holes formed in the bend forming portion 46 of the motor base 37 and the leaf spring 36. The same bending molded part is the same in the engaging portion of the screw 43 for adjusting the position of the spindle motor 35 in the tangential direction.

The relative angle adjustment between the optical pickup device and the disc in the optical disc reproducing apparatus according to the present invention is performed by adjusting the installation angle of the spindle motor 35 for loading the disc. Adjusting the angle of the spindle motor 35 in the tangential direction is made by the adjusting screw 43, and adjusting the angle of the spindle motor 35 in the radial direction (the direction in which the optical pickup device moves forward and backward). By means of a screw 44. This is accomplished by tightening or loosening the screw 44 coupled to the deck base 45 through the threaded hole formed in the bent formation 46 of the leaf spring 36, as shown in FIG. ) Causes elastic deformation in the bending molded part 46, and thus the position of the motor base 37 relative to the deck base 45 may be changed. An adhesive may be applied so that the leaf spring 36 is changed to an appropriate position so that when the installation angle of the motor is adjusted, it can be held in a fixed position. It is also possible to replace the leaf spring 36 with a plastic having sufficient elasticity.

5 shows another embodiment of the present invention. This is to use the elastic part 52 formed integrally with the deck base 45 instead of the separate leaf spring 36 shown in FIG. The elastic portion 52 is spaced apart from the plane of the deck base 45 by a predetermined height and extends parallel to the deck base 45. The elastic portion 52 is preferably formed thinner than the deck base 45, so that the elastic portion 52 has a sufficient elasticity. The installation angle of the motor can be adjusted by tightening or loosening the screw 44 coupled to the deck base 51 through the motor base 37 and the elastic portion 52. Since the installation angle adjustment of the motor is made only in the direction in which the elastic portion 52 approaches the deck base 51, the elastic portion 52 needs to be formed in a state spaced apart from the deck base 51 at a sufficient height. As described above, after the angle adjustment of the motor is completed, the installation angle is fixed and reinforced using an adhesive.

In the optical disc reproducing apparatus according to the present invention, the relative position adjustment between the disc and the optical pickup device is performed by the elastic portion and the adjusting screw which are integrally formed with the leaf spring or the deck base of the simple configuration. There is an advantage that the increase in volume and weight is eliminated. In addition, even in the event of a failure can be expected a side effect of easy repair.

Claims (6)

A deck member 45, an optical pickup means 38 provided on the deck member, an optical pickup drive means 40 for advancing or reversing the optical pickup means 38, and the deck member so as to rotationally drive the disc ( In the optical disk reproducing apparatus provided with the disk driving means 35 provided below the 45, the disk driving means so that the disk driving means 35 can be fixed to the deck member 45 in a positionally variable manner. A base member 37 on which 35 is held; An elastic member (36,52) disposed between the deck member (45,51) and the base member (37); And an adjusting means (43, 44) capable of deforming the shape of the elastic member (36, 52). An optical disc reproducing apparatus according to claim 1, wherein a bending molded part (46) is formed in said elastic member (36). The position of the bent portion 46 is 90 degrees from the circumferential position at which the optical pickup means 38 advances back and forth in an imaginary circle about the rotation axis of the disc drive means 35. And three positions rotated by 180 degrees. The optical disc reproducing apparatus according to claim 1, wherein the elastic member (52) is integrally formed with the deck member (51) in a state in which the elastic member (52) is spaced apart from the deck member (51) and extends in parallel. Device. 5. A position according to claim 4, wherein the position at which the elastic member (52) is formed is 90 degrees from the circumferential position at which the optical pickup means (38) advances back and forth in an imaginary circle about a rotation axis of the disk drive means (35). And three positions rotated by 180 degrees. The method of claim 1, wherein the adjusting means (43, 44) is screwed to the deck member 45 through a hole formed in the base member 37 and the bending portion 46 of the elastic member 36 Optical disk reproducing apparatus, characterized in that the screw (43,44).