KR940004509B1 - Optical disc player & control method - Google Patents

Abstract

The optical disk player comprises a pair of upper and lower frames one end of which is hinged on a bracket, a rack member, first and second guide members and roller guides provided on the frames to guide a pickup carriage to a disk playback position, the pickup carriage having a transmission gear, guide rollers and a pickup having an objective lens thereinside, a pair of left and right turntables coupled to the rotation axis on one side of the bracket, a cam provided along the outer surface of the turntables, and a motor engaging with a worm gear, thereby enabling rapid search.

Description

Optical disc player for double-sided playing and its control method

1 is a side view illustrating a conventional optical disc player.

2 is a front view of FIG. 1.

3 is a front view illustrating in detail a conventional pickup carriage structure.

4 is a planar illustration showing an optical disc player structure of the present invention.

5 is a front view of the present invention.

6 is a side view showing a left side state of the present invention.

7 is a side view showing a state of the right side of the present invention.

8 is an operational state diagram illustrating a turning process of the pickup.

9 is a diagram illustrating a state in which a top surface of a disc is played while turning is completed.

10 is a partial view of the power transmission unit of the present invention.

11 is a flowchart illustrating an operation process and a pickup carriage turning process of the present invention.

* Explanation of symbols for main parts of the drawings

1: turntable 2: spindle motor

10: optical disk 101, 102: bracket

101a, 102a: hinge hole 103: stopper projection

104: Worm 105: combined tilt and turning motor

106: pickup carriage 106a: protruding pin

107: objective lens 108: sliding motor

109: power transmission gear 111, 112: guide roller

113: rotating synchronization shaft 114, 115: turning plate

114a, 115a: Synchronous pickup groove 116: Worm gear

117: stopper pin 118: cam curve

119, 120: guide plate 121, 122: frame

121a, 122a: Hinge shaft 123, 124: Extension piece

125, 126: guide shaft 127, 128: rack member

129: roller guide 130, 131: first and second guide member

132: photo sensor 133: sensing groove

134: pickup detection switch 135: wire escape groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc player for double-sided playing, which is used to continuously reproduce signals recorded on both the upper and lower sides of a disc. In particular, only a sliding motor is mounted in a pickup carriage, and as another function, accurate data detection and response according to the inclination of the disc and The motor having a turning function is provided in a separate kit for zooming, and the present invention relates to an optical disc player for double-sided playing and a control method thereof, which can reduce the weight and size of the pickup carriage and improve the reliability of a quick search and operation.

In general, a conventional optical disc player includes a spindle motor 2 for driving an optical disc 10 mounted on the turntable 1 at a constant speed, as shown in FIGS. 1 and 2, and on an optical disc. A carriage 5 which moves along a pair of guide members 3 and 4 for reproducing the signal recorded in < RTI ID = 0.0 > and < / RTI > Turning means 7 is provided.

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 correction motor 54 for correcting the degree of inclination of the pickup means 6 according to the deflection when the disc is rotated, and 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 while preventing the phenomenon of hitting the end, and the disc is large, 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 movable member 64 To allow for height adjustment of the stage (6).

The carriage 5 configured as described above has racks 31 and 41 formed along the horizontal shift gear 51 driven by the power of the sliding motor 53 and the pair of guide members 3 and 4. By virtue of the engagement driving of the disc), the signal recorded on the surface of the disc is read while moving at a constant speed from the inner periphery of the disc 10 to the outer periphery.

At this time, the carriage (5), which performs the correct horizontal movement along the pair of guide members (3) and (4), first plays the bottom surface of the double-sided optical disk (10), and then turns to play the top surface. Since the turning gear 52 is simultaneously rotating in the sliding motor 53 provided with the 51, the turning gear 52 is engaged with and moved along the inner surface of the circular fixed gear 8. 5) will be a natural twisting motion.

In other words, after reproducing the signal recorded on the bottom surface of the disk 10 while moving along the lower guide member 4, the carriage 5 is displaced from the lower guide member 4, and then speaking to the circular fixed gear 8; Is coupled to the movement guide member 9 is to be followed to the operation to turn to the upper side.

However, such a conventional optical disc player is provided with various driving motors 53, 54, 55 in a form in which the carriage 5 is combined, and its structural assembly form is also very complicated. Due to the increase in weight, it is acting as a big obstacle to shorten the moving speed and search time.

In addition, even when the carriage 5 equipped with the pickup means 6 is turned up and down for reproducing both sides of the disc 10, the carriage 5 is completely out of the disc 10. Since turning is performed, it is necessary to secure a separate moving space for turning the carriage in addition to the disk installation space, and thus, a lot of difficulties are involved in miniaturizing the device, and the carriage 5 itself is turned upside down when turning, so it is read from the pickup means 6. The closed end of twisting the flexible wire for transmitting the input signal to the main body occurred.

The present invention has been made to solve such a conventional problem, the weight of the pickup carriage to move along a pair of guide members for reproducing the signal recorded on the optical disk surface, thereby reducing the reliability of the operation with a quick search Its main purpose is to provide an improved single-sided or dual-sided optical disc player.

It is another object of the present invention to provide an optical disc player which is easy to operate such that the height and height correction is simultaneously performed when the tilt angle and turning combined motor are configured as a single motor.

It is still another object of the present invention to provide an optical disc player which minimizes the space caused by pickup carriage turning.

It is still another object of the present invention to provide a control method of an optical disc player that can accurately detect and reproduce a signal recorded on a disc, while allowing the vertical tilt angle adjustment to be simultaneously controlled outside the pickup carriage.

In order to achieve the above object, the present invention provides a pair of upper and lower frames, one end of which is hinged to the bracket to allow tilt angle correction, and a rack provided on the frame to guide the pickup carriage to the disc play position. Pick-up carriage equipped with a member, first and second guide members, a roller guide, a power transmission gear to be engaged with the rack member, a guide roller on both sides thereof, and a pickup including an objective lens on the inside thereof. And a pair of left and right wheels connected to one side of the bracket to rotate the pickup shaft to induce the turning of the pickup carriage and forming a groove for pickup synchronization on the inner surface, and an outer surface of the wheel to allow the guide shaft on the frame to be fitted. The cam curve provided along with the inclination angle and the ground engaged with the worm gear to drive the turning plate It is characterized by comprising a motor with a Ning combined use.

The present invention also provides a process of inserting a disc into a turntable, a process of setting a play position and a play signal of the inserted disc, and a process of playing a surface of the disc by the pickup carriage performing a play mode according to the detected play signal. And the process of accurately setting the position of the turning plate with the photosensor so as to rotate the pickup carriage reaching the turning position after the playback is completed, and the process of preparing the turning by combining the pickup carriage with the pickup synchronization groove of the set turning plate. And, the process of switching the top and bottom by rotating the rotation plate combined with the pickup carriage 180 °, the process of separating the pickup carriage from the turning plate to move quickly to the play position, and the play on the opposite side in the play position A process of performing a mode and a process of performing a continuous playback which is repeated again after the completion of playback. And a gong.

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

4 is a planar illustration of a double-sided playing optical disc player according to the present invention, FIG. 5 is a front view of the present invention, and FIG. 6 and FIG. 7 are side view examples specifically showing left and right sides of the present invention. 10 degrees is a detailed view of the power transmission unit of the present invention, the optical disk player of the present invention combined tilt angle correction and turning to speak the worm 104 along the motor drive shaft to one side of the bracket 101, 102 coupled to the left and right pairs. While the motor 105 is provided, a pair of wheel plates 114 and 115 are installed in the bracket assembly along the rotary synchronization shaft 113 and guided inside the wheel plates 114 and 115. Install the plates 119 and 120 respectively.

In addition, the right turn plate 115 having the worm gear 116 to be driven in engagement with the worm 104 is provided with a cam curve 118 for guiding the height of the upper and lower frames 121 and 122, but the cam curve The stopper pin 117 is formed on the outer circumferential surface of the concentric circle portion and the variable curved portion so that the stopper pin 117 can be regulated by the stopper protrusion 103 extending from the right bracket 102. The left turn plate 114 is attached to the pick-up detection switch 134 to detect the turning position by contact with the protruding pin 106a protruding on one side of the pickup carriage 106, while the peripheral portion thereof The sensing groove 133 is formed so that the sensing position can be detected by the photosensor 132 fixed on the bracket 101.

However, the wire of the pick-up detection switch 134 placed on the inner surface of the left turn plate 114 is drawn out through the escape groove 135 drilled in the turn plate 114 to prevent an obstacle in the operation process. This is preferred.

Subsequently, the upper and lower frames 121 and 122 are assembled so that the hinge shafts 121a and 122a can be hinged to the hinge holes 101a and 102a which are drilled in the brackets 101 and 102. Guide curves 125 and 126 coated on the extension pieces 123 and 124 of the 121 and 122 are fitted to the cam curve 118 of the turning plate 115 so that the variable curved surface of the cam curve 118 is provided. When the guide shafts 125 and 126 move up and down along the unit, the frames 121 and 122 are also controlled to have a constant inclination angle.

The upper and lower frames 121 and 122 are mounted on the frames 121 and 122 by mounting rack members 127 and 128, a roll guide 129, and first and second guide members 130 and 131, respectively. It is to ensure a smooth horizontal movement of the pickup carriage 106 moving along.

In the pick-up carriage 106, which is controlled to be separated by the first and second guide members 130 and 131, and is installed to move along the rack members 127 and 128 and the roller guide 129, an objective lens is provided. Pick-up having a 107 and its own sliding motor 108 is provided, and the outside of the pickup carriage 106 is connected to the sliding motor 108 and the reduction gear again to provide a driving force to the pickup carriage Guide rollers 111 on both sides so that the transmission gear 109 and the picker carriage 106 can be guided by being guided by turning the grooves 114a and 115a of the pickup synchronization plate 114 and 115 during turning. 112 is provided.

Accordingly, the pickup carriage 106 is capable of reproducing the recording signal of the disk 10 mounted on the ten table 1 while the power transmission gear 109 is guided along the rack members 127 and 128 by its own driving force. will be.

According to the present invention configured as described above, the optical disk 10 is first seated on the upper surface of the ten table 1 driven by the spindle motor 2, and then the play is performed by sliding the sliding motor (in the pickup carriage 106). When power is applied to 108, the power transmission gear 109, which is connected to the sliding motor 108 and the reduction gear, meshes with the rack member 128 on the lower frame 122 to rotate the pickup carriage 106 horizontally. In this case, the pickup carriage 106 accurately guided by the second guide member 131 can reproduce the signal while moving from the inner circumference of the disc bottom surface 10a to the outer circumferential direction. The right side of the pick-up carriage 106 is guided by being fitted to the second guide member 131, and a pair of guide rollers 111 and 112 are arranged at the outer foot of the rack member 128 and the roller guide 129. The sag is regulated because it is guided accordingly.

On the other hand, when the disk 10 seated on the turntable 1 shows a slight sag due to its own weight, the pickup carriage 106 also needs to be corrected by the inclination angle. After detecting the inclination direction and the degree of inclination of the disk 10 through the inclination angle sensor (not shown), the guide shafts 125 and 126 may be moved within the “BCDE” section, which is a variable curved portion of the cam curve 118. The tilt angle correction and turning combined motor 105 is rotated forward and backward by the detected distance so that the upper and lower frames 121 and 122 that are hinged and fixed about the hinge axes 121a and 122a are desired. It will be adjusted at the angle of. In this operation, the stopper pin 117 on the right turn plate 115 abuts against the stopper protrusion 103 of the bracket 102 to prevent reverse rotation, and then rotates in one direction by counterclockwise rotation of the turn plate 115. As a result, the rotation is limited to and the desired tilt angle correction can be achieved.

After the reproduction of the lower surface of the disc 10a is completed by adjusting the inclination angle as described above, the pickup carriage 106 stops the sliding motor 108 after completing the movement from the "I" position to the "II" position in FIG. To prepare for turning.

When turning, the upper frame 121, as well as the lower frame 122, on which the pickup carriage 106 is installed, should be in a horizontal state, and the inclination angle correction and the like can be maintained to maintain the horizontal state of the lower frame 122. The turning combined motor 105 performs forward and reverse rotation.

That is, when the position of the sensing groove 133 is detected using the photosensor 132, the guide shafts 125 and 126 caulked on the upper and lower frames 121 and 122 are right-turned plate 115 and cam curve 118. The upper and lower frames 121 and 122 are both horizontal while being fixed at the concentric circle position on the upper side.

After determining the position of the turning plate 115 required for turning through this process, the sliding motor 108 and the inclination angle correction and turning combined motor 105 in the pickup carriage 106 are rotated at the same time so that the pickup carriage 106 is rotated. Is moved to the "III" position in FIG.

While the pickup carriage 106 moves from the " II " position to the " III " position, the guide rollers 111 and 112 on both sides of the pickup carriage 106 are pick-up grooves 114a on the turning plates 114 and 115. 8), the pickup carriage 106 maintains the fixed mode regulated by the pickup synchronization grooves 114a and 115a. After turning to position "IV" in FIG. 9, the motor is turned to position "V" in FIG. 9.

In other words, the pickup carriage 106 is fitted into the pickup synchronization grooves 114a and 115a of the turning plates 114 and 115 so that the protruding pins 106a of the pickup carriage 106 are picked up and detected on the turning plate 114. When making contact with the switch 134, the sliding motor 108 is stopped and further movement is suppressed while the inclination angle correction and turning combined motor 105 starts to rotate counterclockwise so that the pickup carriage 106 ) Is to rotate 180 °, the right turn plate 115 to prevent the phenomenon that the turning plate 114 further rotates due to the inertia even after detecting the rotation state of 180 ° by the photosensor 132 at this time It is preferable to protrude the stopper pins 117 at intervals of 180 degrees.

Meanwhile, the pickup carriages 106 rotated together with the turning plates 114 and 115 by the guide rollers 111 and 112 at both ends of the turning plates 114 and 115 so as not to be out of the mode. 119) and 120, and the pickup carriage 106, which has been turned, is inside the disk 10 along the first guide member 130 and the rack member 127, which are provided in the upper frame 121 again. Proceeds to the "VI" position in FIG. 9 while detecting the playback position of the upper surface of the disc (10b) and then stops.

Subsequently, the disk upper surface 10b is reproduced in the direction of advancing from the "VI" position inside the disc 10 to the "V" position outside as described above.

However, when the disc top surface is reproduced, the tilt curve 115 maintains the cam curve 118 rotated by 180 ° so that the inclination angle is corrected by using the second variable curved portion “EFGHA” section on the cam curve 118. In this case, the sliding is performed in the same manner as in playback.

The operation of the present invention as described above will be summarized by the flow chart of FIG.

First, when the selected disk 10 to be played is inserted into the turntable 1 (step 201, the sliding motor 108 and the tilt angle correction according to the driving of the sensor detecting that the disk 10 is inserted and The turning combined motor 105 starts to rotate (step 202).

At this time, by the rotation of the sliding motor 108, the pickup carriage 106 waits in the state of moving to the play position of the disk 10, the inclination angle correction and turning combined motor 105 of the left turn plate 114 The sensing groove 133 stops after rotating the worm gear 116 on the turning plate 115 to a position detected by the photosensor 132.

After the initialization is performed by performing the step 202, it is determined whether the photosensor 132 is "On" (step 203).

According to the determination result, play mode execution (step 204) and return to step 202 are selectively performed.

That is, when the photosensor 132 is "On", the play mode is performed. When the play mode is performed, the constant speed rotation of the sliding motor 108, the inclination angle correction and the driving of the combined turning motor 105, By simultaneously driving the spindle motor 2 for rotating the disk 10, the pickup carriage 106 is moved from the inside of the disc to the outside at an appropriate speed for reproducing data. When the inclination angle is achieved, the turning plate 115 may be moved in the forward and reverse directions to correct the inclination angle, thereby completing adjustment in the “BCDE” section of the cam curve 118.

In addition, when the "off" state of the photosensor 132 is detected as a result of the determination of the step 203, the step 202 is returned.

After the step 204 is completed and the reproduction of the disc lower surface 10a is completed (step 205), the position of the turning plate 115 for turning the pickup carriage 106 must be set (step 208). If the reproduction of the lower surface 10a is not finished, the process returns to the step 204 again, performs the play mode corresponding to the remaining section again, and then proceeds to the next step 209.

However, in the case of receiving the turning key to the upper surface of the disk 10b during playback of the lower surface of the disk 10a (step 206), the slide motor 108 is rotated at three times the speed to move the pickup carriage 106 to the turning position of the outer circumference of the disk. The step 208 described above is performed after moving out quickly (step 207).

When the pickup carriage 106 reaches the position where the disc 10 has finished playing and is ready for turning, the sliding motor 108 is "Off" and the tilt angle correction and turning combined motor 105 is "On". The pickup carriage 106 is adjusted to a position where it can be fitted into the pickup synchronization grooves 114a and 115a on the turning plates 114 and 115, while the objective lens in the spindle motor 2 and the pickup carriage 106 is positioned. 107 causes the operation to stop (step 208).

In this state, the pickup carriage 106 is in the " II " position in FIG. When the turning condition is established through the step 208, the position of the turning plates 114 and 115 necessary for turning the pick-up carriage 106 may be set to operate the photosensor 132 (step 209).

As described above, after the photosensor 132 detects the position of the sensing groove 133 of the turning plate 114 and maintains the upper and lower frames 121 and 122 in a parallel state, the turning plate (turning plate) is used to turn the pickup carriage 106. The sliding motor 108 is rotated only until the guide rollers 111 and 112 are inserted into the pickup synchronization grooves 114a and 115a of the 114 and 115 (step 210) and the pickup carriage 106. At the moment when the projecting pin 106a of the pickup carriage 106 touches the pickup detecting switch 134 to form a contact (step 211). It can be.

The pick-up detection switch 134 contacts the protruding pins 106a of the pickup carriage 106 through the staff 211, so that the pickup carriage 106 is correctly installed in the pickup synchronization groove 114a of the turning plate 114. If it is judged whether or not the state is not detected to return to the step 210 to readjust the correct position of the pickup carriage 106, the pickup detection switch 134 is in contact with the protruding pin (106a) turning position When it is confirmed that the exact position in the sliding motor 108 in the state of stopping the tilt angle correction and turning combined motor only counterclockwise by turning the counterclockwise (turning plate mounted pick-up cage 106 ( 114 can be turned (step 212).

The turning is completed when the photosensor 132 detects the position of the sensing groove 133 on the opposite side (step 213).

In addition, when judging whether the photosensor 132 detects the position of the sensing groove 133 through the staff 213, if it is not detected, the sensor returns to the staff 212, and the photosensor 132 detects the position. When the groove 133 is detected to confirm that the turning is made correctly, the sliding motor 108 is rotated quickly in the counterclockwise direction to separate the pickup carriage 106 from the turning plates 114 and 115 (step). 214).

At this time, the tilt angle correction and turning combined motor 105 is stopped. After the pick-up carriage 106 exits from the spin plates 114 and 115, the spin plates 114 and 115 are rotated 180 ° to prepare for inclination angle correction while continuing to move to the inner side of the disc top surface 10b. It will be in a state.

The pickup carriage 106, which has been turned while passing through the staff 212, moves to the inside of the disk 10 to find the play position of the upper surface of the disk 10b (step 215). Play mode is executed (step 216).

That is, if the play signal switch is turned "on", the play mode is performed to play the disc top surface 10b (step 216). In this case, the spindle motor 2 is rotated in the reverse direction while the sliding motor 108 is rotated. ) Rotates in the forward direction to perform the play, using the tilt angle correction and turning motor 105, and the forward and reverse rotation according to the inclination direction due to the deflection of the disk to the upper and lower frames ("EFGHA" section of the cam curve 118) 121) (122) Adjust the height. At this time, the objective lens 107 also starts to operate.

In this way, the pick-up carriage 106 which has regenerated or selectively regenerated the disk lower surface 10a and the upper surface of the disk 10b is rotated 180 ° by the rotation of the turning plate 114 as shown in FIG. When the pickup detecting switch 134 is reached, continuous playback or end of play on the opposite side is selected (step 218).

In this case, when the continuous playback is to be prepared, turning is prepared in the same manner as the above-described procedure, and the turning and reproducing process is easily explained by the repeated process after the step 208 described above. .

As described in detail above, an independent driving sliding motor is provided in the pickup carriage, and the turning plate can be controlled by using the other inclination angle correction and turning combined motor as a single unit, so that the turning space or the narrow area of the pickup carriage can be controlled. The present invention is configured to be effectively turned in the present invention, in addition to the unique turning method to lighten the pickup carriage, the convenience of being able to simultaneously control the vertical tilt angle adjustment from the outside of the pickup carriage, the rapid search due to the light weight of the device In addition, the present invention can provide various advantages such as significantly reducing motor power consumption.

Claims (10)

A pair of upper and lower frames, one end of which is hinged to the bracket to enable tilt angle correction; Rack members, first and second guide members and roller guides respectively provided on the frame to guide the pickup carriage to the disc play position; A pickup carriage that speaks a power transmission gear so as to be engaged with the rack member and has guide rollers at both sides thereof and a pickup including an objective lens at an inner side thereof; A pair of left and right turning plates connected to one side of a bracket by a rotating synchronization shaft to induce turning of the pickup carriage; Cam curve provided along the outer surface of the turning plate so that the guide shaft on the frame can be fitted, and an inclination angle and a turning combined motor coupled with the worm gear to drive the turning plate Optical disc player. The optical disc player according to claim 1, wherein the pickup carriage is provided with a sliding motor for driving the power transmission gear, an inclination angle sensor, and a protrusion pin for driving the pickup detecting switch, respectively. The optical disc player according to claim 1, wherein a pickup detecting switch for detecting a turning position of a pickup carriage is provided on an inner surface of one side of the turning plate assembled along the rotating synchronization shaft. According to claim 1, wherein the stopper pin is projected on the other turn plate having a cam curve on the outer surface of the pair of turn plate, and the stopper protrusion is protruded to the bracket to stop the unnecessary rotation of the turn plate An optical disc player for playing on both sides, characterized in that configured to be suppressed. 5. A double-sided performance optical disc player as set forth in claim 4, wherein a stopper pin protruding from said turning plate is formed at an interval of 180 degrees on the outer side of the cam curve to provide an accurate turning position of the turning plate. The double-sided performance optical disc player according to claim 1, wherein the cam curve on the turning plate comprises a concentric circle portion and a variable curved portion to move the guide shaft on the extension piece extending from the frame up and down to correct the inclination angle. According to any one of claims 1 or 3 to 6, wherein the pickup synchronization groove is formed on the inner surface of the turning plate, the outer peripheral plate of the turning plate is provided with a guide plate to prevent the departure of the pickup carriage when turning An optical disc player for playing on both sides. The optical disc player according to claim 7, wherein the turning plate includes a sensing groove indicating a pickup carriage turning position, and a photo sensor is installed on the bracket to detect the sensing groove. A method of continuously playing back signals recorded on both sides of a disc, the method comprising: inserting a disc into a turntable, setting a playback position of the inserted disc and detecting a play signal, and picking up the carriage according to the detected play signal. Process of playing one side of the disc, setting the position of the turning plate accurately as a photosensor to rotate the pickup carriage that has reached the turning position after playing, and picking up the pickup turning groove of the turning plate The process of preparing the turning by combining the carriage, the process of switching the top and bottom by rotating the turning plate combined with the pickup carriage 180 degrees, and the process of separating the pickup carriage after turning is completed from the turning plate and moving to the regeneration position quickly. And, the process of performing the play mode of the opposite side at the play position, and the continuous material to be repeated again after the completion of playback A control method of an optical disc player for playing on both sides, characterized in that the process of performing the life in sequence. 10. The apparatus of claim 9, wherein if a selection mode for reproducing the other side is input while the play mode is performed according to the detected reproducing signal, the pickup carriage is moved to the turning position to stop the reproducing, and the reproducing of the opposite side is performed. Control method of the optical disk player for playing on both sides characterized in that.