JPH0664871B2 - Optical disk mechanism of optical disk device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an optical head lock mechanism of an optical disk device of a cartridge type, and particularly to operational reliability that makes the optical head movable only when a cartridge is mounted. The present invention relates to an excellent optical head lock mechanism of an optical disk device.

[Conventional technology]

Conventionally, an optical disk drive is provided with an optical head drive mechanism that holds an optical head and is movable in the radial direction of the optical disk in order to record information on or reproduce information from the optical disk.

Therefore, the optical head moves in a movable direction due to vibrations of transportation and transportation of the optical disk device, and the performance of the optical head is deteriorated due to damage of optical components due to collision of the mechanical system and deviation of optical precision.

In order to prevent this, a fixing screw for fixing the optical head in the optical disk device is usually provided to prevent movement of the optical head during transportation. However, if the product is transported with the fixing screw removed, the above problem occurs.

Therefore, there is an optical head drive mechanism that prevents the movement of the optical head by performing power from a drive motor or the like through a worm and a worm wheel. There is a problem that cannot be done.

Therefore, in the optical head drive mechanism of the optical disk device, which uses a linear motor capable of high-speed access operation as a drive source, the load on the drive unit is very small, so that the drive force is exerted during control (when servo is applied). Therefore, there is no problem), and an optical head lock mechanism that fixes the operation of the optical head is indispensable. Especially, a configuration that releases the optical head lock mechanism only during control (when an optical disc is mounted) is optimal. is there.

Incidentally, as an optical head lock mechanism related to this type of optical disk device, there is, for example, Japanese Utility Model Laid-Open No. 56-140902 which adopts a fixing screw system.

[Problems to be solved by the invention]

In the above-mentioned conventional fixing screw method, the optical head is locked at the time of product shipment, and it is possible to prevent the damage of the mechanical system and the precision deviation of the optical parts.

However, once the fixing screw is released, the above problem will occur during re-transportation or transportation between rooms. In addition, there is a problem in handleability because it is fixed and released with screws.

It is also conceivable that a locking mechanism for driving a fixing pin or the like with a solenoid or the like instead of the fixing screw is provided, and the optical head is locked when the power supply to this solenoid is turned off.

However, as the operation of the solenoid, it is necessary to energize the optical disk device at all times while the optical disk device is operating, and there are problems such as an increase in power consumption, an increase in component cost, and an increase in mounting space.

Further, if the worm and the worm wheel are used in the optical head drive mechanism, high-speed access is impossible as described above, and there is a problem in performance.

The present invention has been made to eliminate the above-mentioned problems, and an object of the present invention is to store an optical disk as a locking mechanism of an optical head in an optical disk apparatus equipped with an optical head drive mechanism capable of high-speed access operation in the optical disk apparatus. Another object of the present invention is to provide an optical head lock mechanism having a simple structure that releases the lock mechanism of the optical head only when the cartridge is mounted.

[Means for solving problems]

To achieve the above object, the present invention provides a slider of a loading mechanism for mounting a cartridge accommodating an optical disc at a predetermined position in an optical disc device or ejecting the cartridge to the outside of the optical disc device, and a projection provided on the slider. A lock lever that engages with the optical disk unit to swing by the operation of the slider, a first rack part provided on the lock lever, and an optical head provided on the optical disk device in the radial direction of the optical disk. It is characterized in that the optical head drive mechanism and the second rack portion that engages with and disengages from the first rack provided in the optical head drive mechanism are provided.

[Action]

In the optical head lock mechanism according to the present invention, the first rack portion and the second rack portion are coupled to each other in the first state where the slider allows the cartridge to be inserted into the optical disk device, and the cartridge is the optical disk device. In a second state in which the slider is mounted at a predetermined position, the lock lever is swung by the convex portion of the slider to release the coupling between the first rack portion and the second rack portion. is there.

〔Example〕

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

FIGS. 1 (a) and 1 (b) are operation configuration diagrams of an optical head lock mechanism in an optical disk device according to an embodiment of the present invention, and FIG. FIG. 1B is an operation configuration diagram in the first state in which the cartridge can be inserted, and FIG. 1B is an operation configuration diagram in the second state in which the cartridge is mounted at a predetermined position in the optical disc device.

2 (a) to 2 (c) are explanatory views showing a loading operation method, FIG. 2 (a) is a top view, and FIG. 2 (b).
FIG. 2 is a side view showing a state where the cartridge is inserted into the optical disc device (similar to the case of ejection), and FIG. 2C is a side view showing a state where the cartridge is mounted at a predetermined position inside the optical disc device.

In the figure, 1 is a main chassis having a U-shaped cross section, 2 is a hole provided on the bottom side of the main chassis 1, 3 is guide holes provided on both sides of the main chassis 1, and 10 is a disk motor.
A disk motor drive unit including a turntable 12, a turntable 12, a center adapter 13, and the like.

Reference numeral 20 denotes an optical head drive mechanism that is configured by a base 23 or the like that holds an optical unit 21, an actuator 22, and the like, and that has a second rack portion 24. Reference numeral 25 denotes the optical head drive mechanism 20 along the hole and the optical disc ( (Not shown) is a drive unit that drives in the radial direction.

30 is a swing pin 31, a lock pin 32, and a guide hole as a convex portion
A slider provided with 33 and the like, and a reference numeral 35 is a lock lever which is held on the bottom side of the main chassis 1 by a rotating pin 38 and in which a guide hole 36 which engages with the first rack portion 37 and the swing pin 31 is formed. .

Reference numeral 40 denotes a slider lock lever which is held on the bottom side of the main chassis 1 by a rotating pin 43 and which has a lock portion 41 and a pressing pin 42.

In FIG. 2, 50 is a cartridge holder for holding the cartridge 60, 51 is a guide pin, 5 is a positioning pin, 6 is a spring, and 70 is an optical disk device.

Next, the operation will be described. First, the loading operation will be described with reference to FIG.

As shown in FIG. 2B, when the cartridge 60 is inserted into the optical disk device 70, the cartridge holder 50 holding the cartridge 60 is provided with the guide pin 51 fixed to the cartridge holder 50 on the slider 30. Guide hole
It is located in the horizontal portion of 33 and is also engaged with the guide holes 3 provided on both sides of the main chassis 1.

Therefore, the vertical direction is held by the guide hole 33 of the slider 30, and the horizontal direction is held by the guide hole 3 of the main chassis 1, which is regulated at a predetermined position, and the cartridge 60 can be inserted.

The slider 30 is constantly tensioned by the spring 6 in the direction of arrow A in the figure, but in the slider 30, the lock portion 41 of the slider lock lever 40 is connected to the lock pin 32 provided on the slider. Therefore, the slider 30 has a predetermined position (the lock pin 32 and the lock portion 41 shown in FIG. 2A).
Is in the position where it was joined).

By the way, in the state of FIG. 2B, the cartridge
Insert the 60 along the cartridge holder 50 into place and the cartridge 60
The pressing pin 42 provided on 40 is operated.

Therefore, the pressing pin 42 is operated, and the slider lock lever 40 rotates about the rotation pin 43.
The state shown by the dotted line in FIG.

That is, the connection between the lock pin 32 fixed to the slider 30 and the lock portion 41 of the slider lock lever 40 is released, so that the slider 30 moves in the direction of arrow A by the tension of the spring 6.

Therefore, the operation of the slider 30 causes the guide pin 51 fixed to the cartridge holder 50 to receive a downward operation force by the inclined portion of the guide hole 33 of the slider 30, and
Since the guide pin 51 is engaged with the guide hole 3 of the main chassis 1, the cartridge holder 50 moves downward along the guide hole 3.
The cartridge 60 held by 50 also loads downward.

By the loading operation of the cartridge 60, the second
As shown in FIG. 2C, the cartridge 60 is formed by engaging the positioning pin 5 provided in the main chassis 1 with the positioning hole 61 provided in the cartridge 60.
Is to be positioned.

The ejecting operation for taking out the cartridge 60 from the loaded state to the outside of the optical disk device 70 is the operation in the opposite direction to the loading operation described above, that is, the slider 30 is operated in the direction opposite to the arrow A direction in the figure, and the slider lock lever 40 is moved. It is possible to set it in a state of being locked by.

That is, in order to mount or eject the cartridge at a predetermined position in the optical disk device, the slider 30 is simply used.
Is operated in the direction of arrow A in the figure (reverse direction at the time of discharging).

Next, the optical head lock mechanism of the present invention will be described with reference to FIG.

That is, in FIG. 1A, as described above, the slider 30 is in the stopped state at the position where the lock portion 41 of the slider lock lever 40 and the lock pin 32 provided on the slider 30 are coupled, and the cartridge 60 ( (Not shown) can be inserted (state of FIG. 2 (b)).

At this time, the lock lever 35 is positioned by the guide hole 33 that engages with the swing pin 31 provided on the slider 30.

Here, in the first state in which the cartridge 60 of FIG. 1A can be inserted, the operation as the optical disk device 70 is not performed (the optical disk device is not installed because the cartridge 60 is not installed). Therefore, the optical head drive mechanism 20 needs to be in a locked state.

Therefore, in FIG. 1 (a), the guide hole 36 of the lock lever 35 is
The swing pin 31 as a convex portion provided on the slider 30 that engages with the
At the position of the lock lever 35 determined by the configuration of
Since the first rack portion 37 provided on the lock lever 35 and the second rack portion 24 provided on the optical head drive mechanism 20 are combined (engaged with each other), the optical head drive mechanism 20 Is a locked state.

It should be noted that, in the state where the first rack portion 37 and the second rack portion 24 are connected, the first rack portion 37 does not apply pressure (pressure in the connecting direction) to the second rack portion 24. By configuring the guide hole 36 of the lock lever 35 and the swing pin 31 provided in the slider 30, the optical head drive mechanism 20 is configured with high precision without applying unnecessary stress to the optical head drive mechanism 20. The reliability of the mechanism 20 can be improved.

Further, in order to enable the locked state within the operating range of the optical head drive mechanism 20, the second rack section 24 is always set to a length that can be combined with the first rack section 37 even within the operating range.

Next, in the second state in which the cartridge 60 shown in FIG. 1 (b) is mounted in a predetermined position of the optical disk device 70, it is necessary to perform a predetermined operation as the optical disk device 70. The locked state of the mechanism 20 must be released.

That is, as described above, when the cartridge 60 is mounted in the predetermined position of the optical disk device 70, the slider 30
Is operating in the direction of arrow A in the figure, the swing pin 31 provided on the slider 30 also moves in the direction of A.

At this time, since the guide hole 36 of the lock lever 35 that engages with the swing pin 31 has a shape having a slightly inclined portion as shown in the figure, the operation of the swing pin 31 causes the lock lever 35 to rotate. As the pin 38 is swung in the direction of arrow B, the first rack portion 37 of the lock lever 35 is also swung in the direction B, and is separated from the second rack portion 24 to release the locked state and The head drive mechanism 20 can be moved to a predetermined position by the drive unit 25.

That is, the lock lever 35 that is swung by the operation of the swing pin 31 provided on the slider 30 that performs the loading operation.
Only by providing the cartridge 60 in the optical disk device 70
The optical head drive mechanism 20 is released from the locked state only when the (optical disc housed inside) is mounted at a predetermined position,
In other states, the optical head drive mechanism 20 is reliably locked even when the optical disk device 70 is powered on.

〔The invention's effect〕

As is apparent from the above description, according to the optical head lock mechanism of the optical disk device of the present invention, the operation of the slider for performing the loading operation of the optical disk device is effectively utilized, and the swing pin provided on the slider is engaged. By constructing a rock lever having a guide hole for fitting and having a first rack portion swingable, and providing a second rack portion in an optical head drive mechanism having an optical head, etc. In the first state in which the optical disc, the cartridge, etc. are inserted, the optical head drive mechanism is always in the locked state, and the optical head drive mechanism is unlocked only when the cartridge, that is, the optical disc is mounted at a predetermined position in the optical disc device. Since it is configured like this, an optical device with an optical head lock mechanism that is excellent in operation reliability and is compact, lightweight, and low cost Effect of providing a click device is achieved.

[Brief description of drawings]

1 (a) and 1 (b) are operation block diagrams of an optical head lock mechanism in an optical disc device showing an embodiment of the present invention.
FIG. 1 (a) is an operation configuration diagram of the cartridge in a first state in which the cartridge can be inserted into the optical disc device during the loading operation, and FIG. 2A to 2C are explanatory views showing a loading operation system, FIG. 2A is a top view, and FIG. 2B is a cartridge optical disk device. FIG. 2 (c) is a side view showing a state where the cartridge is inserted into the optical disc device, and FIG. Explanation of reference numerals 1: Main chassis, 20: Optical head drive mechanism, 24: Second rack part, 30: Slider, 31: Swing pin, 35: Lock lever, 36: Guide hole, 37: First rack part , 38: Rotating pin, 6
0: Cartridge, 70: Optical disk device

Claims (2)

[Claims] 1. An optical disc device having an optical head for mounting a cartridge containing an optical disc at a predetermined position in the optical disc device and recording or reproducing an information signal on the optical disc in the cartridge holder for holding the cartridge. A slider that drives the lock lever, a lock lever that engages with a convex portion provided on the slider to swing by the operation of the slider, a first rack portion provided on the lock lever, and the optical head. The optical head drive mechanism for driving the optical disc in the radial direction includes the first rack and the second rack portion that is engaged and disengaged, and the slider enables the cartridge to be inserted into the optical disc device. In the first state, the first rack portion and the second rack portion are combined, and the cartridge In a second state in which the optical disc device is mounted at a predetermined position, the protrusion of the slider causes the lock lever to swing to release the coupling between the first rack portion and the second rack portion. An optical head lock mechanism for an optical disk device, which is configured as described above. 2. The first rack part and the second rack part are configured to have a length such that they can be combined within the operating range of the optical head drive mechanism.
An optical head lock mechanism of the optical disk device described in the paragraph. 3. In the first state in which the first rack portion and the second rack portion are joined together, pressure should not be applied to the second rack portion by the first rack portion in the joining direction. The optical head lock mechanism of the optical disk device according to claim (1), characterized in that the convex portion of the slider and the lock lever are configured.