KR100268588B1 - Disc actuating device and method - Google Patents

Abstract

The present invention relates to a disk drive and a drive method that are suitable for slimming.

According to the present invention, after sensing the position of the optical pickup, the optical pickup is moved toward the hinge point of the sled base before the sled base descends.

According to the disk driving apparatus and the driving method according to the present invention, the thickness can be reduced by moving the optical pickup toward the hinge point before lowering the sled base so that the optical pickup does not interfere with the printed circuit board.

Description

Apparatus For Driving Disc And Methods Thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device and a drive method, and more particularly, to a disk drive device and a drive method adapted for slimming.

As information recording and / or reproducing media, optical discs, such as DVD series and magneto-optical discs, as well as CD-type optical discs, which have already been generalized, have been developed and marketed. Various information devices ranging from large to small (or portable), such as a desktop computer and a notebook computer, are provided with a disk drive device for recording information on an optical disk or reproducing the recorded information. The disc drive device is divided into an insertion method in which a user directly pushes an optical disc to a load completion point and a tray load method for transferring an optical disc to a load completion point using a tray on which the disc is mounted. A disc drive device employing a tray load method that has formed a mainstream in recent years will be described with reference to FIGS. 1 and 2.

FIG. 1 shows a state in which the optical pickup 8 and the spindle motor 16 are inclined downward so as not to interfere with the tray 4 during a load or unload operation, and FIG. 2 shows the spindle motor in a rod completed state. The disk 1 is seated at 16, and the disk is accessed by the optical pickup 8.

As can be seen in FIGS. 1 and 2, the disc drive device includes a tray 4 for transferring a bare disc (a blade disc not stored in a cartridge) or a cartridge 2 in which the disc 1 is stored. An optical pickup 8 for irradiating light to the information recording surface of the disk 1 for recording or reproducing information on the disk 1, a spindle motor 16 for rotating the disk 1, and a spindle motor ( 16) a printed circuit board on which a clamper 10 for tightly fixing and fixing the disk 1 to the disk 1, a clamp holder 12 for supporting the clamper 10, and circuits for interfacing with a servo circuit and a peripheral device are mounted. (Printed Circuit Board: hereinafter referred to as "PCB") (7).

The tray 4 is driven by a driving force of a load motor (not shown) to an access position so that the bare disk or cartridge 2 is housed so that the optical pickup 8 can access the disk 1, and thus the bare disk or cartridge (2) will be transferred. The clamper 10 drives the spindle motor 16 by tightly fixing and fixing the disk 1 to the rotor of the spindle motor 16 by mutually clamping force with the spindle motor 16. The disk 1 does not slip on the rotor portion of the spindle motor 16 when 1) rotates. The spindle motor 16 and the optical pickup 8 are supported by the sled base 16. The sled base 6 pivots about the hinge point 6a so that the spindle motor 16 and the optical pickup 8 do not interfere with the tray 4 in which the linear pickup 8 moves in the period during which the tray 4 is driven and transported. 1 and then lowered to the state as shown in FIG. 1, when the transfer of the tray 4 is completed, the disc 1 is seated on the spindle motor 16 and the hinge point for the optical pickup 8 to access the disc 1. It turns around 6a and it rises as shown in FIG. The PCB 7 includes two circuits for performing a tracking servo and a focusing servo by driving an actuator mounted with an objective lens in the optical pickup 8, a memory for storing data, Encoding / decoding circuits, circuits for controlling the spindle motor 16, circuits for converting analog signals into digital form, interface circuits for interfacing with peripherals, and for controlling all of these circuits. Micro Computer is mounted. The optical pickup 8 is transported from the inner circumference to the outer circumference on the information recording surface of the disk 1 to restrain the disk 1 and must not contact the PCB 7 in any case where the sled base 6 is raised or lowered. Should be. However, as can be seen in the drawing, the thickness of the tray 4 is inevitably thicker when the cartridge 2 is loaded than when the disk 1 having a thin thickness is loaded. In this case, in order to be able to load the cartridge 2 within the limited design space due to the increase in the thickness of the disk drive, the components constituting the disk drive have to be thinned and the arrangement between adjacent parts has to be optimized. . Moreover, in recent years, information devices have been miniaturized, and in order to realize this, thinning of a disk drive device must be preceded. Meanwhile, some manufacturers are proposing a device bay (DB) specification. This method is proposed to make it easy to add, replace, and upgrade without opening a case when adding, replacing, or upgrading a peripheral device in an information device. According to the proposal, the disk drive device should be designed to be slimmer than the current standard size in consideration of the movement of the peripheral device into or removed from the information device. In fact, the current standardized disk drive is designed to be 199 (length) x 146 (width) x 41.6 (height), whereas the proposed standard requires 178 (length) x 146 (width) x 36 (height). . Accordingly, in order to meet the proposed specification, the parts have to be thinned or the layout design is optimized, but this causes an increase in manufacturing cost. Assuming that the optical pickup 8 and the spindle motor 16 currently used are applied to a disk drive designed according to the proposed standard (height: 32 mm), the optical pickup 8 contacts the PCB 7 as shown in FIG. This makes implementation impossible. 1 and 2 show a disk drive device according to the size of a disk drive device currently used, and FIG. 3 shows a disk drive device according to the size of a proposed slim disk drive device. Referring to FIG. 3, the optical pickup 8 must be lowered by the sled base 6 so as not to interfere with the tray 4 in the loading operation or the unloading operation of the tray 4, but the optical pickup 8 has a PCB ( 7) the sled base 6 is not sufficiently lowered so that the optical pickup 8 or the spindle motor 16 interferes with the transfer movement of the tray 4. In addition, while the optical pickup 8 is accessing the disc 1 in the recording mode or the reproduction mode, power is abnormally supplied when the optical pickup 8 is located at an arbitrary point on the information recording surface of the disc 1. Otherwise, the optical pickup 8 stops at the current position. In this case, if the optical pickup 8 is located at the innermost circumference of the disc 1, the optical pickup 8 contacts the PCB 7 and interferes with the lowering of the sled base 6, so that the optical pickup 8 And the spindle motor 16 interfere with the feed movement of the tray 4. In general, an emergency eject device is installed in the disc drive device to manually remove the recording medium in response to an abnormal drive environment such as abnormal power cut-off. However, in the above case, the optical pickup device 8 Since the tray 4 is not ejected to the outside because the sled base 6 is prevented from falling, the emergency ejection device cannot perform its function. To solve this problem, as can be seen in Figure 3, the PCB 7 in the disc drive device causes a problem that a large portion is to be removed or cut in the center.

Accordingly, an object of the present invention is to provide a disk drive device that is made slim.

Another object of the present invention is to provide a disk drive device capable of taking out a recording medium to the outside in an abnormal driving environment.

1 is a longitudinal sectional view showing a conventional disk drive in a state where the sled base is lowered.

Figure 2 is a longitudinal sectional view showing a conventional disk drive in a state where the sled base is raised.

3 is a longitudinal cross-sectional view illustrating a state in which an optical pickup interferes with a printed circuit board when the thickness of the disc drive device shown in FIGS. 1 and 2 is reduced.

4 is a plan view (a) and a longitudinal sectional view (b) of a disk drive device according to an embodiment of the present invention in a state where the sled base is raised;

Fig. 5 is a plan view (a) and a longitudinal sectional view (b) showing a state in which the slider is moved approximately 70% to the left in the disc drive shown in Fig. 4;

FIG. 6 is a plan view (a) and a longitudinal sectional view (b) showing a state in which the slider is moved 100% to the left in the disk drive shown in FIG. 4; FIG.

FIG. 7 is a plan view showing an emergency eject in the disk drive shown in FIG. 4; FIG.

8 is a flowchart showing a processing procedure of a pickup drive program;

<Description of the code | symbol about the principal part of drawing>

1: disc 2: cartridge

4: tray 6: sled base

6a: hinge point 6b: protrusion

7: printed circuit board 8: optical pickup

10: clamper 12: clamp holder

16: spindle motor 16a: turntable

22: first lever 22a: first lever hinge point

24: second lever 24a: second lever hinge point

26: compression spring 28: slider

28a: Cam 28b: Arm

30: load motor 32: rod gear system

34: switch

In order to achieve the above object, the disk drive apparatus of the present invention includes a sensing means for sensing the position of the optical pickup, and the optical pickup driving means for moving the optical pickup toward the hinge point before the sled base descends.

The disk drive apparatus of the present invention includes driving means for driving the sled base and emergency driving means for driving the optical pickup toward the hinge point before the sled base is lowered in conjunction with the driving means.

The disk driving method of the present invention includes sensing the position of the optical pickup and moving the optical pickup toward the hinge point of the sled base before the sled base descends.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 4 to 7.

4 shows a disc drive device according to an embodiment of the present invention, which shows a plan view (a) and a longitudinal sectional view (b) of the disc drive device when the sled base is raised, respectively.

In the configuration of Fig. 4, the disc drive device according to the present invention comprises an optical pickup 8 for optically accessing the disc 1, a switch 34 for sensing a current position of the optical pickup 8, A sled base 6 for supporting the pickup 8, a slider 28 for driving the sled base 6, and a rod gear system for sequentially driving the tray 4 and the slider 28. (32), first and second levers (22, 24) for manually driving the optical pickup (8), and a compression spring (26) for applying a restoring force to the first lever (22). The optical pickup 8 is driven by a pickup drive motor (not shown) according to the command of the recording mode or the reproducing mode when the sled base 6 is raised to equilibrium, so that the disk along the radial direction of the disk 1 is carried out. The information recording surface (1) is accessed. In a normal driving environment, the switch 34 serves to sense the current position of the optical pickup 8 before the sled base 6 descends to expose the tray 4 to the outside. Thus, the switch 34 may be any sensor for sensing the current position of the optical pickup 8. The slider 28 is commonly coupled to the rod gear system 32 and the sled base 6 to serve to raise / lower the sled base 6 by driving the rod gear system 32. A cam 28a is formed on the side wall of the slider 28. And the sled base 6 is provided with the projection 6b which fits in the cam 28a. Accordingly, when the slider 28 is driven in the left direction in the drawing, the protrusion 6b is lowered along the cam 28a so that the sled base 6 is lowered about the hinge point. The rod gear system 32 is commonly fastened to the tray 4 and the slider 28 so that the driving force generated from the load motor 30 at the start of the load or unload operation of the tray 4 is transferred to the tray 4. The slider 28 is sequentially transmitted. The first and second levers 22 and 24 are installed for an abnormal driving environment (i.e., emergency ejection), and are installed between the slider 28 and the optical pickup 8 as the slider 28 is driven. It interlocks and forcibly drives the optical pickup 8. The first and second levers 22 and 24 are configured such that the driving direction of the slider 28 and the optical pickup 28 can be driven in the same direction. To this end, the first and second levers 22 and 24 are opposed to each other about the first lever hinge point 22a and the second lever hinge point 22b, respectively, so that one side is in contact with each other and staggered from each other. Is driven in the direction. Here, the second lever 24 is in contact with the slider 28 in contact with the arm 28b protruding from one side of the slider 28 as the slider 28 is driven. The compression spring 26 is in a free state with a fixed point on only one side when the optical pickup 8 is located on the innermost circumferential side (the rightmost side in the drawing) with respect to the disc 1 and artificially in the case of emergency ejection. After the slider 28 is compressed by the first lever 24 when the slider 28 is driven to the left, the emergency eject state is released and then the first lever 22 is applied by applying a restoring force to the first lever 22 in the normal driving state. One side of 22) is placed on the optical pickup movement path.

The operation procedure of the disk drive apparatus and method of the present invention will be described with reference to Figs. After the bare disk or the cartridge 2 is accommodated in the tray 4, the tray 4 is linearly driven to the disk access position by the load gear system 32. In addition, the driving force of the rod gear system 32 sequentially drives the slider 28, and the sled base 6 pivots around the hinge point 6a to ascend and thus becomes as shown in FIG. 4 (b). At this time, the disk 1 is seated on the turntable 16a of the spindle motor 16, and the clamper 10 fixes the disk 1 to the turntable 16a. When a command of the reproducing or recording mode is supplied by a microcomputer (not shown), the spindle motor 16 rotates and the optical pickup 8 transfers the radial direction on the information recording surface of the disc 1 to read data on the information recording surface. Or record. At this time, the first and second levers 22 and 24 are in a free state, and are enclosed by the optical pickup 8 on the optical pickup path to center the first and second lever hinge points 22a and 24a, respectively. Rotate in opposite directions. In Fig. 4, if the optical pickup 8 is currently accessing the outermost circumferential side (leftmost side in the drawing) of the disc 1, then the first and second levers 22, 24 are placed in a hatched state. do. When the optical pickup 8 starts to be transferred to the inner circumferential side of the disc (right side in the drawing), the first lever 22 whose one side is entrusted to the optical pickup 8 is counterclockwise around the first lever hinge point 22a. And the second lever 22 is rotated clockwise about the second lever hinge point 24a. Under normal driving conditions, the compression spring 26 is fixed to only one side to maintain a free state.

5 and 6 show that the slave base 6 and the tray 4 are sequentially driven in order for the tray 4 to be transported outward. Under normal driving conditions, the microcomputer loads the pickup drive program from the system memory before the sled base 6 descends. The pickup drive program is programmed as shown in FIG. 8 and executed by the microcomputer as follows. When the user presses the eject key to eject the tray 4 (step S1), the microcomputer drives the pickup drive motor until the optical pickup 8 contacts the switch 34. The optical pickup 8 is transferred to the left side as shown in FIG. 5. (Step S2) When the microcomputer determines that the switch 34 is turned on (Step S3), the microcomputer drives the rod gear system 32. Step S4) Here, when the switch 34 is installed on the outer circumferential side of the disk 1 in the drawing, but the switch 34 is installed on the inner circumferential side, the microcomputer moves the optical pickup 8 to the inner circumferential side of the disk so that the switch ( When the switch 34 is determined to be turned on after the 34 is turned on, the optical pickup 8 is moved to the outer peripheral side of the disk by a predetermined amount, and then the rod gear system 32 is driven. When execution of the pick-up drive program is finished and the rod gear system 32 is driven, the slider 28 starts to move to the left side by transmitting the driving force of the rod motor 30. Then, the second lever 24 is pushed by the arm 28b of the slider to rotate counterclockwise around the second lever hinge point 24a and the first lever 22 is interlocked with the second lever 24. It rotates clockwise about the 1st lever hinge point 22a. At the same time, the sled base 6 follows the cam 28a of the slider 28 and is rotated about the hinge point 6a and lowered. FIG. 5 shows the slider 28 approximately 70% moved to the left and FIG. 6 shows the slider 28 100% moved to the left. At this time, the sled base 6 remains lowered after the slider 28 is moved approximately 70% to the left side, and the optical pickup 8 is moved to the outer peripheral side of the disk, thus contacting the PCB 7. Will not be. Referring to FIG. 5, when the slider 28 is moved approximately 70% to the left, the first lever 22 is entrusted to the optical pickup 8 at the left end on the optical pickup movement path. Referring to FIG. 6, when the slider 20 is moved 100% to the left, the first lever 24 may be freed from the optical pickup 8 to move out of the optical pickup movement path and to compress the compression spring 26. When the slider 20 is moved 100% to the left, the tray 4 receives the driving force of the load motor 30 and starts to be transferred to the outside.

The load operation from the unloaded state where the tray 4 is completely transferred to the outside to the load completion position is as follows. When the user stores the bare disk or the cartridge 2 in the tray 4 and pushes the tray 4, the load motor 30 is driven to move the tray 4 to the left so that the tray 4 is placed at the load completion point. As soon as the driving force of the load motor 30 is transmitted to the slider 28. The slider 28 is then driven to the right and the second lever 24 is released from the arm 28b. At this time, the restoring force by the compression spring 26 is applied to the first lever 22 to rotate in the counterclockwise direction about the first lever hinge point 22a, thereby being positioned on the optical pickup movement path. The sled base 6 then rises along the cam 28a of the slider 28. When the sled base 6 is positioned horizontally, the optical pickup 8 is accessed in the radial direction of the disc 1 in the recording mode or the reproduction mode. At this time, since the first and second levers 22 and 24 are not restrained by the arm 28b and the compression spring 26 of the slider 28, they are placed in a free state.

If power is abnormally supplied, the recording medium should be artificially taken out using emergency ejection. Referring to FIG. 7, when power is not abnormally supplied, the optical pickup 8 stops at an arbitrary position on the optical pickup movement path. At this time, the first and second levers 22 and 24 are in a free state. In order for the user to withdraw the cartridge 2 to the outside, the sled base 6 must be lowered so as not to interfere with driving of the tray 4. To this end, the user artificially drives the slider 28 in the direction of the arrow using a pin. The arm 28b then pushes the second lever 24 so that the second lever 24 rotates counterclockwise around the second lever hinge point 24a and the first lever 22 is the first lever. The optical pickup 8 is pushed to the left by rotating clockwise around the hinge point 22a. At this time, when the slider 28 moves approximately 70% on the movement path of the slider 28, the optical pickup 8 is positioned at the leftmost end on the optical pickup movement path, and when the slider 28 is moved 100%, The first lever 22 is out of the optical pickup movement path. At this time, the first lever 22 compresses the compression spring 26. And as the slider 28 is driven to the left side, the sled base 6 is lowered, and as the rod gear system 32 meshed with the slider 28 is driven in a minute section, the tray 4 is loaded with the rod gear system 32. ) Is projected outward as much as it is driven. Finally, the user can pull out the cartridge 2 by pulling out the tray 4. When the power is supplied again to the normal driving environment, the tray 4 is driven to reach the load completion point, and the slider 28 is driven in the direction opposite to the arrow so that the second lever 22 is freed from the arm 28b. By the restoring force of the compression spring 26, the first lever 22 is rotated counterclockwise to be positioned on the optical pickup movement path.

As described above, the disk drive apparatus according to the present invention can reduce the thickness by moving the optical pickup toward the hinge point before lowering the sled base so that the optical pickup does not interfere with the printed circuit board. Furthermore, in the disc drive device according to the present invention, when the slider is pushed by staggering the two levers between the slider and the optical pickup, the optical pickup is moved toward the hinge point, and then the sled base is lowered so that the optical pickup is a printed circuit board. Not only does it interfere with the thickness of the disk drive, but also the stable ejection device capable of taking the recording medium to the outside even in an abnormal driving environment can be realized.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (5)

A disk drive apparatus having a sled base for raising and lowering optical pickup by pivoting about a hinge point, Sensing means for sensing a position of the optical pickup; And optical pickup driving means for moving the optical pickup toward the hinge point before the sled base descends. The method of claim 1, A tray in which the recording medium is stored and installed linearly, A slider for driving the sled base; And a rod driving means for sequentially driving the tray and the slider. A disk drive apparatus having a sled base for raising and lowering optical pickup by pivoting about a hinge point, Driving means for driving the sled base; And an emergency driving means interlocked with the driving means to drive the optical pickup toward the hinge point before the sled base descends. The method of claim 3, wherein The emergency driving means includes a first lever interlocked with the driving means; And a second lever linked to the first lever to push the optical pickup toward the hinge point. Detecting the position of the optical pickup; Moving the optical pickup toward a hinge point of the sled base before the sled base descends.