JP2781448B2 - Actuator lock device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for protecting an actuator such as a drive source of a head seek mechanism of a recording / reproducing device using a medium such as an optical disk or a magnetic disk from external impact.

2. Description of the Related Art As a conventional actuator lock device, a structure is known as shown in FIGS. 3 (a) to 3 (c).
3A is a front view showing a conventional actuator lock device, FIG. 3B is a bottom view of the actuator lock device of FIG. 3A, and FIG. 3C is a view of FIG. 3A. It is a top view of an actuator lock device.

Reference numeral 3 in the figure indicates a rotating shaft, and the rotating shaft 3 is rotatably supported by a bearing (not shown). Reference numeral 1 denotes a lock member for locking the actuator, and reference numeral 2 denotes a lock member.
Denotes an operation lever for operating the lock member 1, and the lock member 1 and the operation lever 2 are integrally fixed to the rotation shaft 3. Actuating lever 2
Has a bifurcated tip.

Reference numeral 8 denotes an electromagnetic solenoid, and a pin 5 is attached to the plunger 4 of the electromagnetic solenoid 8,
The pin 5 is locked to the forked portion of the operating lever 2 so that the operation of the plunger 4 and the rotation of the operating lever 2 are interlocked. The electromagnetic solenoid 8 is set so that the plunger 4 is housed in the solenoid 8 by its operation, and the plunger 4 is urged by the spring 4 in a direction away from the electromagnetic solenoid 8. Reference numeral 7 denotes a spring receiver that receives one end of the spring 6, and reference numeral 2a denotes a stopper that restricts the rotation of the lever 2 at a fixed position.

Reference numeral 9 denotes a part of a voice coil motor as an actuator part.
On the lock member 1 side, an engaged portion 9a as one member of a lock means for locking the motor 9 is formed. The lock member 1 is formed with an engagement portion 1a as the other member of the lock means that locks the motor 9 by fitting to the engaged portion 9a.

In the actuator lock device configured as described above, when releasing the lock of the voice coil motor 9,
Power is supplied to the electromagnetic solenoid 8. As a result, the plunger 4 is pulled into the solenoid 8 against the urging force of the spring 6, and the operating lever 2 is rotated via the pin 5 to rotate the rotary shaft 3. The locking means 1 is rotated by the rotation of the rotating shaft 3, the engaging portion 1 a is disengaged from the engaged portion 9 a, and the lock of the voice coil motor 9 is released.

When the voice coil motor 9 is locked, the energization of the electromagnetic solenoid 8 is stopped. As a result, the force of the electromagnetic solenoid 8 to retract the plunger 4 is eliminated, and the plunger 4 moves in a direction away from the solenoid 8 by the urging force of the spring 6. As a result, the operation lever 2 is rotated in the opposite direction to the above-described case, and the rotation shaft 3 is rotated. The rotation of the rotating shaft 3 causes the locking means 1 to rotate until it comes into contact with the stopper 2a, so that the engaging portion 1a engages with the engaged portion 9a, and the voice coil motor 9 is locked. Thus, when the recording / reproducing apparatus is not operating, the voice coil motor 9
Is protected against external impact.

Problems to be Solved by the Invention However, the above-mentioned conventional actuator lock device has the following problems.

(1) In order to maintain the unlocked state of the voice coil motor 9, it is necessary to continuously energize the electromagnetic solenoid 8, and the power consumption increases.

(2) If the electromagnetic solenoid 8 is continuously energized, the solenoid 8 generates heat, causing the temperature of the entire apparatus to rise, and the trouble due to heat is likely to occur.

(3) Since the plunger 4 of the electromagnetic solenoid 8 is a sliding part, if the number of operations increases, play occurs between the plunger 4 and the main body, making the operation uncertain.

(4) Since the operation monitoring means of the electromagnetic solenoid 8 is not provided, in the worst case, there is a possibility that the voice coil motor 9 and its driving circuit may be burned.

The present invention solves such a conventional problem,
The actuator can be locked or unlocked without using electric power when the recording / reproducing device is operating or not operating,
An object of the present invention is to provide an actuator lock device capable of suppressing heat generation.

Means for Solving the Problems The actuator lock device of the present invention comprises a lock portion and a lock operation mechanism portion, wherein the lock operation mechanism portion is
A first mechanism directly driven by the loading operation of the medium, and a one-way transmission means having a one-way transmission means for directly transmitting the driving force from the first mechanism and unlocking the driving mechanism, and absorbing the driving force from the locking portion side. 2 is provided.

In the actuator lock device having the above structure, when the medium is loaded or unloaded, the first mechanism is directly driven in conjunction with the loading or unloading, and the first mechanism drives the second mechanism to lock the medium. Is locked. The driving force from the second mechanism is absorbed by the one-way transmission means.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 (a) is a front view showing an actuator lock device of the present invention, FIG. 1 (b) is a bottom view of the actuator lock device of FIG. 1 (a), and FIG. 1 (c) is FIG. FIG. 1 (b) is a partial side view of the actuator lock device, and FIG. 1 (d) is a plan view of the actuator lock device of FIG. 1 (a).

Reference numeral 12 in the drawing indicates a rotation axis, and this rotation axis 12
A slit 12a is formed at the upper end in FIG. 1 (a) and is rotatably supported by a bearing (not shown). Reference numeral 11 denotes a lock member serving as a lock portion of the actuator, and reference numeral 13 denotes a first operating lever for operating the lock member 11. The lock member 11 and the first operating lever 13 are integrated with the rotating shaft 12, respectively. Is fixed.

As shown in FIG. 1 (b),
A spring 14 for urging in a clockwise direction inside is attached. Reference numeral 15 denotes a stopper that restricts rotation of the lever 13 by the spring 14 at a fixed position, and reference numeral 16 denotes a first sensor that detects rotation of the first lever 13.

As shown in FIG. 1C, a second lever 17 is connected to the first lever 13 via a connecting rod 21. The second lever 17 has a rotating shaft 17 a orthogonal to the rotating shaft 12 of the first lever 13.
And is rotatably supported. The connecting rod 21 has one end thereof rotatably attached to the first lever 13,
The other end is formed in the second lever 17 and is engaged with an arc-shaped long hole 17b centered on the rotation shaft 17a.

Below the second lever 17, a drive plate 23 is provided which is linked to a loading operation for inserting a medium such as an optical disk or a floppy disk into the recording / reproducing apparatus or an unloading operation for discharging the medium. The lower portion of the second lever 17 is pushed on the driving plate 23 to move the lever 17 in the counterclockwise direction in the drawing.
Is formed.

When the medium is loaded, the driving force is transmitted from the driving plate 23 to the locking member 11 by the first lever 13, the second lever 17, the connecting rod 21, the driving plate 23, and the like. Is unlocked, and the driving force in the locking direction disappears during unloading, and the lock operation mechanism is configured to lock the lock portion. Further, the first lever 17 and the driving plate 23
The first lever 13 constitutes a second mechanism, and the long hole 17b and the connecting rod 21 constitute one-way transmission means.

Reference numeral 18 denotes a spring for urging the second lever 17 in a clockwise direction in FIG. 1C, reference numeral 19 denotes a stopper for regulating the rotation of the second lever 17 at a fixed position, and reference numeral 20 denotes the second lever. A second sensor for detecting rotation of 17 is shown.

In FIG. 1 (d), reference numeral 22 denotes a part of a voice coil motor as an actuator.
An engaged portion 22a is formed as one member of the lock means for locking the 22. The lock member 11 is formed with an engagement portion 11a as the other member of the lock means that locks the motor 22 by fitting to the engaged portion 22a. That is, the engaging portion 11a of the lock member 11 and the voice coil motor 22
And the engaged portion 22a constitute a lock portion.

In the actuator lock device configured as described above, when a medium is inserted into the recording / reproducing device, FIG.
As shown in the figure, the driving plate 23 is moved in the direction of the arrow 23b by the force of the loading drive source or the like, and the projection 23a is
Press 17 to rotate to the position shown by the phantom line. Connecting rod 21
Is in contact with the lower end of the long hole 17b of the second lever 17, and the rotation of the second lever 17 pushes the connecting rod 21 to rotate the first lever 13. The rotation of the first lever 13 causes the lock member 11 to move through the rotation shaft 12 as indicated by an arrow in FIG.
It is rotated in the direction of 11b. Then, the rotation of the lock member 11 causes the engagement portion 11a to be disengaged from the engaged portion 22a, so that the lock of the voice coil motor 22 is released, and the voice coil motor 22 is unlocked.
22 performs normal operation. At this time, the first sensor 16 and the second sensor 20 detect that the levers 13 and 17 have rotated.

When the medium is ejected from the recording / reproducing apparatus, the driving plate 23 moves in the opposite direction to the case where the medium is inserted, and the projection 23
The second lever 17 is released from the restraint by a, and the second lever 1 is released.
7 is rotated clockwise in FIG. 1C to the position of the stopper 19 by the spring 18. Then, the restraint of the first lever 13 by the connecting rod 21 is released, and the lever 13 is stopped by the spring 14 in the clockwise direction in FIG.
Rotated to 15 positions. The rotation of the first lever 13 causes the engaging portion 11a to engage with the engaged portion 22a, and the voice coil motor
22 is locked. At this time, the first sensor 16 and the second sensor 20 detect that the levers 13 and 17 have rotated.

When the actuator locking device is manually locked or unlocked, the slot 12a of the rotating shaft 12 is turned with a screwdriver (not shown) to engage the engaging portion 11a with the engaged portion 22a, or Remove from 22a. At this time, the first lever 13 also rotates, but the connecting rod 21 moves only in the elongated hole 17a of the second lever 17, and the second lever 17 does not rotate. As a result, the first sensor 16 detects the rotation of the first lever 13, but the second sensor 20 does not detect the rotation of the second lever 17. You can know that it is manual.

As described above, since the locking or unlocking of the actuator locking device and the holding of the locked state are performed in conjunction with the loading operation of the medium, no special power source is required for the locking operation and the like, and the power consumption is reduced. In addition, the amount of heat generated can be reduced.

In addition, the signals from the first and second sensors 16 and 20 can be used to efficiently control the voice coil motor 22 and its driving circuit to achieve appropriate protection.

 Next, a second embodiment of the present invention will be described.

In this second embodiment, FIGS. 2 (a), (b), (c)
As shown in FIG. 7, the second lever 37 is cut off from the first lever 13 to be a direct acting type. Engaging part 11 in second embodiment
a, the structure of the engaged portion 22a or the first lever 13 is the first
It is the same as the structure of the embodiment.

In the second embodiment, the second lever 37 has a rod shape and is slidably supported in the axial direction by the device side wall 37a. Reference numeral 39a denotes the second lever 37 in FIG. 2 (b).
The flange part for restricting the downward movement in the center at the set position is shown. A spring 38 for urging the second lever 37 downward in the drawing is provided on the opposite side of the flange portion 39a across the wall 37a. Reference numeral 39b indicates a spring receiver.

On the first lever 13 side of the second lever 37, a sensor projection 37 is provided.
The second sensor 40 is provided so as to sandwich the sensor projection 37b. The first lever 13 and the second lever 37 are not connected, and as one-way transmission means, the driving force is transmitted only when the first lever 13 is pressed by the second lever 37 by being brought into contact with each other by the springs 14 and 38. It is configured to be. The first mechanism is constituted by the second lever 37, and the second mechanism is constituted by the first lever 13.

Reference numeral 41 denotes a medium, and when the medium 41 is inserted and ejected, the second lever 37 is directly moved and the first lever 37 is moved.
13 is pushed up, the voice coil motor 22 is locked, and the contact portions are separated from each other with respect to the transmission of the driving force in the unlocking direction accompanying the unlocking performed by manually rotating the rotating shaft 12. The transmission of the driving force in the unlock direction is configured to be absorbed.

As a result, the same operation and effect as those of the first embodiment can be obtained, and the recording / reproducing apparatus can be adapted to both the front loading method and the top loading method, so that the degree of freedom in designing the recording / reproducing apparatus is increased. .

Further, the connecting rod is not required, and the reliability is improved, for example, the mechanism is simplified and the life of the apparatus is extended.

Effects of the Invention As described above, according to the actuator lock device of the present invention, the locking or unlocking of the actuator locking device and the holding of the locked state of the actuator locking device are linked with the operation of inserting and discharging the medium. Therefore, there is an advantage that a power source is not specially required for a lock operation or the like, and power consumption can be reduced and a heat generation amount can be reduced.

[Brief description of the drawings]

1 (a) is a front view showing an actuator lock device of the present invention, FIG. 1 (b) is a bottom view of the actuator lock device of FIG. 1 (a), and FIG. 1 (c) is FIG. FIG. 1 (d) is a partial side view of the actuator locking device of FIG.
Is a plan view of the actuator lock device of FIG.
FIG. 2 (a) is a front view showing a second embodiment of the actuator lock device of the present invention, FIG. 2 (b) is a bottom view of the actuator lock device of FIG. 2 (a), and FIG. 2 (c). Is a plan view of the actuator lock device shown in FIG.
3A is a front view showing a conventional actuator lock device, FIG. 3B is a bottom view of the actuator lock device of FIG. 3A, and FIG. 3C is a view of FIG. 3A. It is a top view of an actuator lock device. 11 lock member, 12 rotary shaft, 13 first lever,
17 ... second lever, 17b ... long hole, 21 ... connecting rod, 23 ...
... Drive plate.

Claims (3)

(57) [Claims] A locking portion for engaging with an actuator and testing a locking action; a driving force transmitted in a locking direction during loading of a medium to unlock the locking portion; and a driving force in a locking direction during unloading. And a lock operating mechanism that causes the lock unit to be in a locked state by disappearing, wherein the lock operating mechanism is directly driven by a medium loading operation, and
A second mechanism for unlocking the lock portion by receiving a driving force in the locking direction from the second mechanism; and a driving force in the locking direction from the first mechanism is directly transmitted to the second mechanism to lock the locking portion. A second mechanism having a one-way transmission means for releasing the driving force from the locking portion side to the unlocking direction and absorbing the driving force. 2. The one-way transmission means comprises a connecting rod and an elongated hole to which one end of the connecting rod is movably attached, and the connecting rod moves in the elongated hole to move in the locking direction. 2. The actuator locking device according to claim 1, wherein the driving force is transmitted and the driving force in an unlocking direction is absorbed. 3. The one-way transmission means includes a first mechanism and a second mechanism.
When the first mechanism is moved in the locking direction, the second mechanism is pushed to transmit the driving force in the locking direction, and the second mechanism is moved. 2. The actuator lock device according to claim 1, wherein the abutting portions are separated from each other with respect to the movement in the unlock direction, so that the driving force in the unlock direction is absorbed.