CN1641778A - Method for reducing tray horizontal deflection and optical drive - Google Patents

Abstract

A method and optical drive for reducing the horizontal deflection of a tray, the method comprising at least the following steps: providing a first direction drive signal to a drive device of the optical drive so that the drive device drives the tray of the optical drive to move from a first position to a second position; when the tray reaches the second position, providing the drive device with a second drive signal opposite to the first direction drive signal to correct the position of the tray.

Description

Method for reducing tray horizontal deflection and optical drive

technical field

The invention relates to a tray-type optical drive, in particular to an optical drive capable of reducing left and right swings when the tray extends out of the body.

Background technique

FIG. 1A is a schematic diagram of a conventional short-tray optical drive, which has an optical drive body 11 and a tray 12 . The difference between it and the standard tray-type optical drive is that the body and tray are shorter. In addition, the tray 12 has a recessed portion 13 for carrying an optical disc; the optical drive body 11 has a loading platform 14 and a driving assembly 17 , and the loading platform 14 is provided with a spindle motor 15 and an optical pickup head 16 . The driving assembly 17 at least includes a motor 171 and a gear set 172 for driving the tray 12. When the driving assembly 17 drives the tray 12 into the optical drive, the loading platform 17 in the optical drive rises, and the spindle motor 15 drives the optical disc to rotate, and can pass through the optical drive. The read head 16 reads data on the optical disc or writes data into the optical disc.

FIG. 1B is a top view of an existing optical drive tray when it is extended. 1A and 1B, the existing optical drive 10 has a rack 121 on one side of the bottom surface of the tray 12, and the motor 171 and the gear set 172 of the drive assembly 17 drive the tray 12 to move from one side of the tray 12 through the rack 121. , the other side of the tray 12 is only driven (driven side), and there needs to be a proper gap between the driven side and the body 11, so that the tray 12 can enter and exit smoothly. But when the drive assembly 17 of the optical drive 10 drives the tray 12 to protrude from the inside of the optical drive 10, the gear set 172 drives the tray 12 through the rack 121 on the left side of the tray 12, so the forward speed of the left side (active side) of the tray 12 is faster. The forward speed of the right side (driven side) is slower, and the tray 12 of the optical drive 10 will deflect to the right at a small angle, and extend out of the optical drive 10 in the manner shown in FIG. 2A. And when the motor 171 reverses and the optical drive 10 retracts the tray 12, the tray 12 will hit the body 11, and then the gear set 172 drives the tray 12 through the rack 121 on the left side of the tray 12, so the backward speed of the left side (active side) of the tray 12 Faster, the retreat speed on the right side (driven side) is slower, the tray 12 of the optical drive 10 will swing a small angle from right to left, and retreat in the optical drive 10 in the manner shown in Figure 2B.

The above-mentioned problems will not occur in the traditional standard optical drive, because the body and the tray of the traditional standard optical drive are longer. When the tray is protruded from the optical drive body to the outside for positioning, the tray still retains an appropriate length inside the optical drive body. , the angle of inclination of the tray to the right (driven side) is very small, so when the motor reverses and the optical drive retracts the tray, the swing of the tray to the left is also small, and it is difficult to be noticed by the user.

However, when the body of the optical drive is shortened, the length of the tray also needs to be shortened. When the tray extends out of the short optical drive body, the distance between the end of the tray and the optical drive body is relatively short, and the gap on the driven side will be greatly enlarged. When the optical drive extends the tray and retracts the tray, the swing range increases, causing the tray to not go in and out smoothly.

Contents of the invention

In view of this, the object of the present invention is to provide an operation method of a short optical drive to reduce the swinging amplitude of the tray when the optical drive retracts the tray.

In order to achieve the above object, the present invention provides a method for reducing the horizontal deflection of the optical drive tray. The method at least includes the following steps: providing the driving device of the optical drive with a first direction driving signal, so that the driving device drives the optical drive tray from the first position to the first position. Moving to the second position; when the tray reaches the second position, a driving signal in the second direction is provided to the driving device within a preset time to correct the position of the tray.

The invention also provides an optical drive capable of reducing the horizontal deflection of the tray. The optical drive at least includes a tray, a driving device and a control assembly. Wherein the driving device can drive the tray to move between a first position and a second position, and the control assembly is used to provide the driving device with a first direction driving signal, so that the driving device drives the tray to move from the first position to the second position, wherein When the tray arrives at the second position, the control component provides a second direction driving signal to the driving device within a predetermined time to correct the position of the tray.

In a preferred embodiment, when the tray is at the first position, the tray is accommodated in the optical drive, and when the tray is at the second position, the tray is protruded from the optical drive. In addition, the drive device at least includes a motor and a gear set, and the control component is a control chip.

In a preferred embodiment, the first direction driving signal is between 4-6V, the second direction driving signal is between 3-5V, and the predetermined time is between 0.1-0.5 seconds.

In order to further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

FIG. 1A is a combined diagram of an existing optical drive.

FIG. 1B is a top view of an existing optical drive tray when it is extended.

FIG. 2A is a schematic diagram of an existing optical drive tray when it is extended.

FIG. 2B is a schematic diagram of an existing optical drive tray when it moves backwards.

FIG. 3A is an assembly diagram of the short optical drive of the present invention.

Fig. 3B is a top view of the tray in Fig. 3A.

Figures 4A-4D are schematic views of the switcher in various operating states when the tray of the short optical drive of the present invention is extended.

Detailed ways

FIG. 3A is a combination diagram of the short optical drive of the present invention. The short tray type optical drive of the present invention has an optical drive body 21 and a tray 22. The length of the main body is between 160 mm and 190 mm. The standard optical drive (for example, the body length is between 190mm and 200mm) is short to save manufacturing cost. As shown in Figure 3A, the tray 22 of the short optical drive 20 has a recessed portion 23 for carrying the optical disc; the optical drive body 21 has a loading platform 24 and a driving assembly 27, and the loading platform 24 is provided with a spindle motor 25 and a The optical pickup head 26; the drive assembly 27 is used to drive the tray 22, at least including a motor 271, a gear set 272 and a belt 273. When the drive assembly 27 drives the tray 22 into the optical drive 20, the loading platform 27 in the optical drive 20 rises, and the main shaft The motor 25 drives the optical disc to rotate, and the optical pickup 26 can read data on the optical disc or write data into the optical disc.

Fig. 3B is a top view of the tray in Fig. 3A. As shown in FIGS. 3A and 3B , the short optical drive 20 has a rack 221 on the left side of the bottom surface of the tray 22 , and the motor 271 and the gear set 272 of the drive assembly 27 drive the tray 22 through the rack 221 . In addition, the front end of the main body 21 of the short optical drive 20 has a switch 28 for detecting the position of the tray 22 relative to the main body 21, and the bottom surface of the tray 22 has a track 222 relative to the position of the switch 28, when the tray 22 is extended Or when retracted, the track 222 can pull the switch 28 to switch to different operating states, so the control unit (not shown) inside the short optical drive 20 can control the motor 271 according to the operating state returned by the switch 28. The tray 22 moves, and it is determined that the tray 22 moves between the first position and the second position or between the first position and the second position.

4A-4D are schematic diagrams of the switching device in various operating states when the tray of the short-type optical drive is extended according to the present invention. The short optical drive 20 of the present invention further includes at least one control assembly 29, the control assembly 29 at least includes a printed circuit board and a control chip 291 arranged on the printed circuit board, wherein the control assembly 29 can be passed through a flexible printed circuit board or The cable is electrically connected to the motor 271 and the switcher 28 respectively, and judges the state of the tray 22 according to the operating state returned by the switcher 28, and then controls the driving direction, driving signal and driving time of the motor 271 accordingly.

As shown in FIGS. 3A and 4A, when the tray 22 of the optical drive 20 is located inside the optical drive 20 (a first position), and the tray 22 is to be stretched out, the bump 281 of the switch 28 is limited by the track 222 on the bottom surface of the tray 22. The right position (the first operating state), and the control chip 291 of the control assembly 29 provides an initial first direction driving signal (such as a forward voltage) for the motor 271 according to the first operating state of the switcher 28, so that The motor 271 rotates in a first direction, and then drives the tray 22 forward through the gear set 272 and the rack 221 . As shown in Figure 4B, along with tray 22 advances, bump 281 of switcher 28 enters the middle section position (second operating state) of track 222, and the control chip 291 of control assembly 29 just according to the first position that switcher 28 is in at this moment The second operating state provides the motor 271 with another relatively large driving signal in the first direction, so that the motor 271 continues to drive the tray 22 forward. But the short optical drive 20 of the present invention is driven by one side, so the forward speed of the left side of the tray 22 (the side with the rack; the active side) is faster, and the one on the right side (the side without the rack; the driven side) The forward speed is relatively slow, so that the tray 22 of the optical drive 20 will rotate a small angle to the right when it is extended, until the tray 22 reaches the second position as shown in FIG. 4C .

At this time, although the control chip 291 has suspended the first direction driving signal, the motor 271 will drive the tray 22 forward again due to inertia, so that the bump 281 of the switch 28 will enter the rear position of the track 222 (the second position) three operating states). Next, the control chip 291 of the control unit 29 will provide a correction signal to the motor 271 according to the third operating state of the switcher 28, such as a driving signal in a second direction opposite to the first direction, so that the motor 271 can operate within a predetermined time. Reversing, the left side of the tray 22 is driven back for a short distance, so the tray 22 will swing to the left at a small angle, so as to correct the position of the tray 22 (as shown in Figure 4D).

In a preferred embodiment, the above-mentioned initial first direction driving signal is between 2~3V, the first direction driving signal is between 4~6V, the second direction driving signal is between 3~5V, and The predetermined time is between 0.1 and 0.5 seconds.

Since the short optical drive of the present invention extends the tray to the second position, the control unit will provide a correction signal again, for example, the drive signal in the second direction causes the motor to reverse to correct the angle of the tray 12 left and right. The invention is to correct the deflection of the pallet while the pallet is moving, so it is not easy to be noticed by the user. In addition, when the optical drive 10 retracts the tray 12, the deflection of the tray 12 has been corrected, so the leftward swing of the tray 12 is also relatively small, and is less likely to be noticed by the user.

Although the present invention has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and other modifications can be made without departing from the spirit of the present invention. Various equivalent changes and modifications, therefore, as long as the changes and modifications to the above embodiments are within the spirit of the present invention, they will all fall within the scope of the claims of the present invention.

Claims (10)

1. method that can reduce the CD ROM support tray horizontal nutation, this CD-ROM drive has a drive unit, can drive this pallet and move between a primary importance and a second place, and this method comprises the following steps: at least

This drive unit one first direction drive signal is provided, makes this drive unit drive this pallet and move to this second place by this primary importance;

When this pallet arrives this second place, provide this drive unit one second direction drive signal, to revise the position of this pallet.

2. the method that reduces the CD ROM support tray horizontal nutation as claimed in claim 1 is characterized in that when this pallet is positioned at this primary importance this pallet is to be accommodated in this CD-ROM drive.

3. the method that reduces the CD ROM support tray horizontal nutation as claimed in claim 1 is characterized in that when this pallet is positioned at this second place this pallet is to be stretched out by this CD-ROM drive.

4. CD-ROM drive that can reduce the pallet horizontal nutation comprises at least:

One body;

One pallet is arranged on this body in the mode that can move between a primary importance and a second place;

One driven unit is arranged on this body, moves between this primary importance and this second place to drive this pallet; And

One Control Component, be used to provide this drive unit one first direction drive signal, making this drive unit drive this pallet is moved to this second place by this primary importance, wherein when this pallet arrives this second place, this Control Component provides this drive unit one second direction drive signal, to revise the position of this pallet.

5. the CD-ROM drive that reduces the pallet horizontal nutation as claimed in claim 4 is characterized in that also comprising a switch, in order to detect the position of described pallet with respect to described body.

6. the CD-ROM drive that reduces the pallet horizontal nutation as claimed in claim 4 is characterized in that when this pallet is positioned at this primary importance this pallet is to be accommodated in this CD-ROM drive.

7. the CD-ROM drive that reduces the pallet horizontal nutation as claimed in claim 4 is characterized in that when this pallet is positioned at this second place this pallet is to be stretched out by this CD-ROM drive.

8. the CD-ROM drive that reduces the pallet horizontal nutation as claimed in claim 4 is characterized in that this time that this second direction drive signal is provided is between 0.1～0.5 second.

9. method that can reduce the CD ROM support tray horizontal nutation, this CD-ROM drive has a drive unit, can drive this pallet and move between a primary importance and a second place, and this method comprises the following steps: at least

This drive unit one first direction drive signal is provided, makes this drive unit drive this pallet and move to this second place by this primary importance;

When this pallet arrives this second place, provide this drive unit one correction signal, to revise the position of this pallet.

10. method as claimed in claim 9, it is characterized in that this drive unit is corresponding to the direction of this first direction drive signal and rotate towards first direction, and this drive unit rotates corresponding to this correction signal second direction, and this first direction is opposite with this second direction.

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