KR960007896B1 - Optical disk player - Google Patents

Abstract

The optical disk player comprises a disk chucking device for locating and landing a disk(D) on the exact location, a pick-up spiral moving device for simultaneously moving a pick-up(4) rotationally and linearly to follow the spiral track on the disk(D), a slop compensation device which compensates for slope of the misaligned pick-up, a top cover(61) turned upwardly and downwardly, a bottom case(63) hinged with the top cover(61), a round fixing table(31) on which the disk lands, and a magnetic chuck(32) which presses top surface of the disk interacting with the fixed disc(31).

Description

Optical disc player

1 is a perspective view of a conventional optical disc player.

2 is an exploded perspective view showing the overall configuration of an optical disc player according to the present invention.

Figure 3 is a longitudinal sectional view showing an embodiment of the transmission means in the optical disc player according to the present invention.

4 is a partial perspective view showing the tilt correction means in the optical disc player according to the present invention.

5 is a cross-sectional view of the coupling state of FIG.

Figure 6 is a front sectional view showing another embodiment of the balance weight in the present invention.

7 is a front sectional view showing a state in which the transfer means is added to the balance weight in the present invention.

* Explanation of symbols for main parts of the drawings

D: Disc 41: Pickup

63: lower case 31: fixed table

44: pickup frame 45: straight guide

46: transfer rack 48: pickup motor

50: spindle motor 50a: spindle motor shaft

49,49c: Rotating Support Pin 44k: One End

72: tilt motor 71a: inclined surface

80: counterweight 20: guide rod

24a, 24b; Supporter 26: Chui Song Motor

28: rack gear 51: spindle motor housing

54: ring type rotary commutator 56: fixed brush

82: upper frame 84: door open stopper

The present invention relates to an optical disc player, and more particularly, in a state in which a disc is fixed, an optical pickup reproduces a disc recording motion by simultaneously performing a linear motion for following a track and a rotational motion for reading a pit. An optical disc player is provided.

In general, various optical disc players such as a compact disc player (CDP), a laser disc player (LDP), or a multi disc player (MDP) configured to be used together, have a spindle motor mounted on a turntable directly connected to the spindle motor. The disk is rotated according to the rotation of the disk, and the optical pickup device which moves linearly in the radial direction of the disk while maintaining a constant distance with the disk is installed at the vertically below the disk to detect the desired track position on the disk. At the same time, at the track position detected, a linear tracking optical pickup device is made by reproducing the recorded contents of the disc using the reflected light detected as a signal source by passing the laser light through the optical system to a pit recorded on the disc surface. Is installed.

The optical disc player provided with the optical tracking device of the linear tracking method is typically a spindle motor 14 and a spindle shaft for rotating the disc as shown in FIG. ), And an optical pickup device 12 that linearly moves in the radial direction from the vertically downward direction of the rotating disk and follows the track on the disk. Such a conventional optical disk player has a large size to rotate a rather heavy disk. As the spindle motor 14 of capacity is required, the power consumption of the spindle motor 14 has a lot of problems. When the spindle motor 14 suddenly stops, a separate brake device is installed due to the rotor inertia of the large motor. This also causes the problem that additional power is consumed to operate the brake system, and loading or Loading (Unloading) there is a mechanism configured to be very complex nanhaeham and frequent failures of the production of, there is a problem of production cost increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a new type of optical pickup device itself can reproduce information recorded on a disc while simultaneously performing a linear motion and a rotational motion while the disc is fixed. The purpose is to provide an optical disc player.

In order to achieve the above object, the present invention provides a disk chucking means and a helical track on the disk to fix and position the disk in position, and pickup spiral motion means for simultaneously performing the rotational motion and the linear motion of the pickup; Inclination correcting means for correcting the inclination of the pickup deviated from the recording surface of the disk so that the pickup is parallel to the recording surface of the disk, and during the helical motion of the pickup spiral movement means, Balance means for preventing the vibration, and the pickup spiral movement means is coupled to the upper lid is pivotally opened and closed, and has a feature configured with a lower case hinged to the upper lid.

Hereinafter, the optical disc player according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings.

2 and 5 show an embodiment of the optical disc player according to the present invention, which follows the disc chucking means for fixing and positioning the disc D in place and the helical track on the disc D. Pick-up spiral movement means for simultaneously performing the rotary motion and the linear motion of the pickup 41, and the pickup 41 shifted from the recording surface of the disk D such that the pickup 41 is positioned in parallel with the recording surface of the disk D. The inclination correcting means for correcting the inclination of the < RTI ID = 0.0 >) < / RTI > Spiral movement means are coupled, and has a feature that is provided with an upper lid 61 is swung open and close in the vertical direction and a lower case 63 hinged to the upper lid 61.

The disk chucking means in the present invention as described above, the magnetic chuck for pressing the upper surface of the disk (D) while interacting with the fixed table 31, the fixed table 31 for mounting the disk (D) ( 32, the disc-shaped fixing table 31 is fixedly installed in the center of the lower case 63, the magnetic chuck 32 is installed to be movable in the center of the upper lid 61, While positioned so as to be coaxial with the fixed table 31, the positioning projection 31a of the shape of a tapered cylinder in order to position the disk (D) in the center of the center of the upper surface of the fixed table 31 in the circumferential direction ) Is formed, and on the fixed table 31 corresponding to the periphery of the positioning projection 31a, a disk-shaped disk adsorption pad 3 is attached to the disk D so as to gently adhere.

In addition, while forming the same horizontal plane as the upper surface of the fixed table 31 and arranged corresponding to the position of equal intervals from the center of the fixed table 31, a plurality of auxiliary tables 39 from the bottom surface of the lower case 82 Protruding installation prevents the disk D from sagging.

In the present invention, the pickup spiral movement means is a pickup linear movement means having a pickup 41 which linearly moves in the radial direction of the disc D along a track on the disc D, and the pickup linear movement means is a disc. It consists of a pickup rotational movement means for rotating the movement on the coaxial line of (D), the linear pickup means is a linear guide on the rectangular pickup frame 44 in the same direction as the radial direction of the disk (D) ( A guide bush 41A installed in the pick-up 41 so that the guide bush 41A is fitted into the straight guide 45 so that the pick-up 41 is linearly guided during the linear motion of the pick-up 41, and the pick-up 41 guided to the straight guide 45 is installed. Pinion 47 fixed to the motor shaft 48a of the pick-up motor 48, but fixed to the transfer rack 46 is installed on one side of the pickup 41 in parallel with the linear guide 45 to linearly move On the pick-up frame 44 by engaging the transfer rack 46 The pickup 41 is configured to linearly move according to the driving of the fixed pickup motor 48.

On the other hand, the pick-up rotational movement means is a rotary plate 49, a pickup spiral movement means including a pickup, a spindle motor 50 for rotating the rotation plate 49, and a spindle of the spindle motor 50 It is composed of a cylindrical bracket (49A) is directly connected to the spindle motor shaft (50a) to be coupled to the motor shaft (50a) and coupled to the central portion of the rotation plate (49).

In the present invention as described above the inclination correcting means as shown in Figures 1 and 4 of the accompanying drawings protruding from the rotating plate 49 the central both sides of the pickup frame 44 installed on the rotating plate 49 It is installed on a pair of rotary support plates 49b and 49c, and a tilt motor 72 in which the inclined cam 71 is installed is installed on the rotation plate 49 around the general portion 44k of the pickup frame 44. The one end portion 44k of the pickup frame 44 is in contact with the inclined surface 71a of the inclined cam 71 so that the pick-up frame 44 is moved by the cam motion of the inclined cam 71 by the rotation of the tilt motor 72. The seesaw movement is provided, and an end portion 44k of the pickup frame is provided with elastic means for always keeping close contact with the inclined surface 71a of the inclined cam 71.

In the inclination correcting means, the elastic means is provided with a tension spring (65) by tensioning both ends on the other end of the pickup frame (44) and its surrounding rotating plate (49) as shown in FIGS. 2 and 5 of the accompanying drawings. Such elastic means are configured to be also composed of a set of magnetic bodies, such as compression spring, toespring, leaf spring, mutual repulsion or attraction force.

On the other hand, in the present invention, the balance means is a balance weight 80 of a predetermined shape to fit the total weight of the pickup 41 on the rotation plate 49 on the opposite side of the pickup linear movement means included in the pickup spiral movement means The center of gravity (W) shown at point W in the drawing as shown in Figure 5 attached to the boundary of the rotation center of the spindle motor 50 is biased to one side to prevent vibration generated during the pickup rotation.

The counterweight 80 is configured to reduce the internal space occupied by the counterweight 80 by configuring any one material of the metal or lead in the class having a high specific gravity with a high ratio of weight per unit volume.

In addition, or another embodiment of the balancing means according to the present invention, as shown in Figure 6 of the accompanying drawings, the balance weight 80 is formed in a thicker inclined toward the center of rotation of the spindle motor 50 weight balance You can make it more stable.

In addition, in another embodiment of the balance means, the transfer means for proportional movement while balancing the weight in the direction opposite to the movement direction of the pickup 41, starting from the center of rotation of the pickup spiral movement means to the balance weight (80) By precisely adjusting the weight balance to provide a further increase in the reliability of the optical disc player, it will be described in more detail with reference to the accompanying drawings as follows.

The transfer means is a guide rod 20 for guiding the balance weight 80, as shown in Figure 7 of the accompanying drawings, the slide is fitted to the guide rod 20, sliding and embedded in the balance weight 80 A support motor 24a, 24b installed on the rotating plate 49 while supporting the bush 22, both ends of the guide rod 20, and a transfer motor serving as a driving source during linear movement of the counterweight 80 ( And power transmission means for transmitting the power from the transfer motor 26 to the balance weight 80.

At this time, the power transmission means is installed on the counterweight 80 so as to be parallel to the pinion gear 27 and the center line of the guide rod 20, the pinion gear (27) directly connected to the feed motor (26) ) And rack gears 28 engaged with each other.

As shown in FIG. 3 of the accompanying drawings in the present invention, the power source and the control device including the spindle motor housing 51, which is a stator, to the pickup spiral motion means including the spindle motor shaft 50a, which is the rotor, It is composed of a transmission means for transmitting a signal, the transmission means is a plurality of ring-shaped rotation insulated at a predetermined interval in the longitudinal direction on the outer periphery of the cylindrical bracket (49a) directly connected to the spindle motor shaft (50a) that is a rotor It is composed of a commutator 54 and a plurality of fixed brushes 56 installed in the spindle motor housing 51 which is a stator and corresponding to the outer circumference of the ring-shaped rotary commutator 54.

On the other hand, as shown in Figure 2 of the accompanying drawings, the opening angle of the upper lid 61 and the lower case 63 to reduce the opening angle of the upper lid 61 and to stop when opening at a predetermined angle (84) Can be installed and configured.

In the figure, reference numeral 37 is a hinge connecting the upper lid 61 and the lower case 63, 38 is a pin penetrating the hinge 37, 53 is a door open stopper ( When the upper lid 61 is closed when 84 is folded, the door opening stopper 84 is a stopper housing part that is housed therein, and 34 is provided on the rotating plate 49 so that various driver circuits are concentrated. The driver substrate is mounted, and 36 is a spacer for separating the bottom surface of the driver substrate 34 from the attachment surface on the rotation plate 49, and 52 is an end portion of the spindle motor shaft 50a. The magnetic chuck 32 is a washer that serves as a locking jaw to hang.

The operation of the present invention configured as described above is as follows.

As shown in FIG. 5, when the disc D is first loaded on the optical disc player, the upper lid 61 is lifted and rotated upward, and the upper lid 61 is lower case. The hinge 66 of the 63 is opened, and the pick-up spiral movement means and the tilt correction means installed on the upper frame 82 inside the upper lid 61, the magnetic chuck 32 is the upper lid 61 The upper lid 61 is secured by the door open stopper 84 installed on one side, and the user fixes the disk D in this state. When seated in the upper lid 61 is closed in the original state as described above, the upper lid 61 and the lower case 63 are joined so as to be movable to the upper frame 82 inside the upper lid 61. The installed magnetic chuck (32) is made of magnetic sensitive material The table 31 is drawn butge.

At this time, the disk (D) placed on the fixed table 31 is located in the center of the lower cable (63) in the pressed state by the clamping action of the magnetic chuck 32 is made to load the disk (D).

Then, when the play button is pressed to play the loaded disc D as described above, the pick-up spiral movement means located slightly above the surface of the disc D is operated without being in contact with the top surface of the disc D. At this time, according to the play signal of the play button, the pick-up spiral motion control signal and the driving power of the pickup of the main control unit are transmitted to the ring-shaped rotary commutator 54 through the fixed brush 56 shown in FIG. The driving power and control signals transmitted to the rotary commutator 54 are again picked-up motor driver portions (not shown) and transition motor driver portions (not shown) of the driver substrate 34 provided on the rotation plate 49. Since the pick-up 41 positioning signal from the main control unit and the pick-up 41 positioning signal of the feed motor 26 for balancing the weight of the balance weight 80 are transmitted even while the spindle motor 50 is being rotated. It is to be transmitted to the pickup motor 48 and the transfer motor 26 without being disconnected.

Accordingly, the spindle motor 50 rotates the pick-up 41 and the pick-up motor 48 simultaneously moves the pick-up 41 of the disk D with the pick-up 41 rotational movement of the spindle motor 50. Since the linear movement is made in the radial direction, the pick-up 41 spirals along the spiral track of the disc D.

On the other hand, the center of gravity of the pickup plate rotated by the spindle motor 50 and the pickup 41 is installed on the rotary plate 49 and rotated together, away from or near the center of rotation of the spindle motor 50. In order to compensate for the fluctuation of the movable balance counterweight 80 as shown in FIG. 7 of the accompanying drawings, the direction of movement of the pickup 41 is opposite to the movement direction of the pick-up 41 with respect to the rotational center of the spindle motor 50. With the movement amount to be made is conveyed during the rotation of the spindle motor 50 to compensate for the variation in the center of gravity by the transfer of the pickup 41, it is possible to follow the stable and precise disk (D) recording surface.

In addition, it is seated on the stationary table 31 and adhered to the stationary table 31 by the magnetic chuck 32 to be firmly fixed without rotation or deviation due to a large number of strong external forces or disturbances, and to the auxiliary table 39 When an inclination error occurs between the recording surface on the disk D supported by the objective lens and the objective lens on the pickup 41, a positioning signal corresponding to the correction amount for correcting the error amount is transmitted from the main controller to the tilt motor 72. The tilt motor 72 receives the driving signal and rotates.

At this time, the inclined cam 71 directly connected to the motor shaft of the tilt motor 72 is rotated at the same time as the rotation of the tilt motor 72, the pickup frame always elastically in close contact with the inclined surface (71a) of the inclined cam (71) 44. One end portion 44k of the inclined surface 71a is rotated by the cam motion of the inclined surface 71a. At this time, the seesaw motion of the pickup frame 44 becomes a fine motion.

Applying the present invention as described above does not require a separate disc loading device can simplify the internal structure of the optical disc player, and because the disc does not rotate can reduce the damage of the disc, cost reduction, product It can improve the reliability of the computer and give the user a feeling of being a new type of optical disc player.

Claims (14)

A disk chucking means for fixing and positioning the disk D in position, a pickup spiral motion means for simultaneously following the helical track on the disk D, and simultaneously performing a rotational motion and a linear motion of the pickup 41; Inclination correction means for correcting the inclination of the pickup 41 shifted from the recording surface of the disk D such that the pickup 41 is positioned parallel to the recording surface of the disk D, and during the spiral motion of the pickup spiral movement means. Balance means for preventing the vibration of the pickup 41 is generated according to the center of gravity that changes from the center of rotation, and the pickup spiral movement means is coupled, the upper lid 61 and the upper lid 61 is opened and closed upward and the upper lid ( 61) and an optical disc player characterized in that it comprises a lower case (63) hinged. The disk chucking means according to claim 1, wherein the disk chucking means has a disk-shaped fixing table 31 for seating the disk D, and a magnetic chuck for pressing the upper surface of the disk D while interacting with the fixing table 31. 32) optical disk player, characterized in that consisting of. 2. The pickup spiral motion means according to claim 1, wherein the pickup spiral motion means comprises a pickup linear motion means provided with a pickup 41 that linearly moves in the radial direction of the disk D along a track on the disk D, and the pickup linear motion means. An optical disc player, characterized in that consisting of a pick-up rotational movement means for rotational movement on the coaxial line of the disk (D). 4. The guide bush (41a) according to claim 3, wherein the pick-up linear movement means is provided with a linear guide (45) in the same direction as the radial direction of the disk (D) on the rectangular pick-up frame (44). ) Is inserted into the linear guide 45 so that the guide 41 is linearly guided during the linear motion of the pickup 41, and the straight line is connected to one side of the pickup 41 to linearly move the pickup 41 guided by the linear guide 45. The transfer rack 46 is fixedly installed so as to be parallel to the guide 45, and the pinion 47 installed on the motor shaft 48a of the pickup motor 48 is engaged with the transfer rack 46 so that the pick-up frame 44 is fixed. The optical disc player, characterized in that the pickup 41 is configured to linearly move in accordance with the driving of the pickup motor (48) fixed on the. The method of claim 3, wherein the pick-up rotational movement means is a rotary plate 49, which is provided with a pickup spiral movement means including a pickup 41, a spindle motor 50 for rotating the rotation plate 49, In order to couple the rotating plate 49 to the spindle motor shaft 50a of the spindle motor 50, it is composed of a cylindrical bracket 49a that is directly connected to the spindle motor shaft 50a and fastened to the center of the rotating plate 49. An optical disc player characterized by the above-mentioned. According to claim 1, wherein the inclination correction means is a pair of rotary support pins (49b) (49c) protruding from the rotary plate 49, the central both sides of the pickup frame 44 is installed on the rotary plate (49) On the rotating plate 49 around the one end 44k of the pick-up frame 44, a tilt motor 72 in which the inclined cam 71 is installed is installed, but the inclined surface 71a of the inclined cam 71 is installed. One end 44k of the pickup frame 44 is brought into contact with the pick-up frame 44 so that the pick-up frame 44 is seesawed by the cam motion of the inclined cam 71 by the rotation of the tilt motor 72. An optical disc player, characterized in that one end portion (44k) is provided with an elastic means for always in close contact with the inclined surface (71a) of the inclined cam (71). 7. The optical disc player as set forth in claim 6, wherein said elastic means is composed of a set of magnetic bodies acting by compression springs, torsion springs, tension springs (65), leaf springs, mutual repulsion or attraction. The balance weight (8) according to claim 1, wherein the balance means is formed in a predetermined shape in accordance with the total weight of the pickup (41) on a rotation plate (49) opposite to the pickup linear motion means included in the pickup spiral motion means. Optical disc player, characterized in that configured by installing. 9. The optical disc player as set forth in claim 8, wherein the counterweight (80) is made of any one material of metal or lead, which is a material belonging to a relatively high specific weight class having a high ratio of weight per unit volume. 9. The optical disc player as set forth in claim 8, wherein the counterweight (80) is formed to be thickened to face the center of rotation of the spindle motor (50). According to claim 8, The counterweight 80 is characterized in that the transfer means for proportional movement while balancing the weight in the direction opposite to the movement direction of the pickup 41 from the center of rotation of the pickup spiral movement means is installed Optical Disc Player. According to claim 11, The transfer means is a guide rod 20 for guiding the balance weight 80, the slide bush 22 is inserted into the guide rod 20, sliding and embedded in the balance weight (80) and The support rods 24a and 24b which are supported on both ends of the guide rod 20 and installed on the rotating plate 49 and the transfer motor 26 serving as a driving source during the linear movement of the counterweight 80, and the transition Optical disc player, characterized in that composed of a power transmission means for transmitting the power from the motor 26 to the balance weight (80). The pinion gear 27 directly connected to the transfer motor 26 and the balance weight 80 are installed on the balance weight 80 so as to be parallel to the axis center line of the guide rod 20. An optical disc player, characterized in that consisting of a rack gear (28) meshing with the on gear (27). The method according to claim 1, wherein the opening angle of the upper lid 61 is limited between the upper lid 61 and the lower case 63, and a door open sputter 84 is installed to prevent excessive opening. Optical disc player.