JPH01211284A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce power consumption and to prevent the rising of a temperature in the title device by composing a rotation regulating mechanism of an actuator, respective locking members provided near the actuator, engaging members to engage to the locking members, and an engaging member driving mechanism. CONSTITUTION:When the rotation of an actuator block 21 is locked, a coil 35a of an engaging arm driving member 33a is conducted and made into a non-magnetic force generating state, an action part 32a of an engaging arm 32 is adsorbed to a permanent magnet 34b of an engaging arm driving member 33b, the engaging arm 32 is rotated, and the engaging part 32a is engaged to a locking piece 29 and made into an engaged state. On the other hand, when the rotation of the block 21 is unlocked, a coil 35b of the member 33b is made into a conductive state and then made into the non-magnetic force generating state, the action part 32a of the arm 32 is adsorbed to a permanent magnet 34a of the member 33a, the arm 32 is rotated, the engaging part 32a is disengaged from the locking piece 29, and a locked state is released.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a magnetic disk device.

(Prior Art) In recent years, magnetic disk devices have been widely used as external storage devices for computers, word processors, and the like.

Examples of such conventional magnetic disk devices include the following.

FIG. 4 is a plan view for explaining a conventional magnetic disk device.

In the figure, reference numeral 1 indicates an actuator block rotatably disposed on a support shaft 2. As shown in FIG. This actuator block 1 is provided with a plurality of arms 3 . There is. Further, the actuator block 1 is provided with a voice coil motor 6 that rotates and displaces the actuator block 1 to move the magnetic head 5 substantially in the radial direction (track direction) of the magnetic disk 4 . A stopper 7 is provided on the outer periphery of the actuator block 1, and this stopper 7 is arranged in a recess 8a of a stopper block 8 disposed near the actuator block 1, so that the rotation range of the actuator block 1 is regulated. It looks like this. Further, a lock piece 9 is provided on the outer periphery of the actuator block 1. A locking mechanism 1 is located near the actuator block 1.
0 is set. This lock mechanism 10 includes a support plate 11, an engagement arm 12 rotatably provided on the support plate 11 and capable of engaging the lock piece 9 described above.
A spring 13 biases the engagement arm 12 in a direction to engage the lock piece 9 of the actuator block 1 when the device is powered off, and a spring 13 urges the engagement arm 12 to engage the lock piece 9 when the device is powered on. 9, and a solenoid 14 for moving it in the direction of removing it.

In the conventional magnetic disk device configured as described above, when the power of the device is OFF, the solenoid 14
becomes a de-energized state, and as shown in FIG. 5, the engaging arm 12 is rotated by the biasing force of the spring 13 and engages with the locking piece 9, so that the actuator block 1 is held in the locked state. Further, when the power of the device is turned on, the solenoid 14 is energized and the engagement arm 12 is disengaged from the lock piece 9 against the biasing force of the spring 13, as shown in FIG.

In this state (with the solenoid 14 still energized!B), the actuator block 1 is rotationally displaced by the voice coil motor 6, and the magnetic head 5 performs data writing and reading operations on the magnetic disk 4. .

However, in the conventional magnetic disk device configured in this way, the solenoid 14 is kept in an excited state while the device is in operation, which has the problem of increased power consumption. Since the magnetic disk device has a sealed structure, there is a problem in that the temperature inside the device increases.

(Problems to be Solved by the Invention) The present invention is intended to solve the above-mentioned problems, and is a magnetic disk that can reduce the power consumption of the device and prevent the temperature rise inside the device. The purpose is to provide equipment.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a rotatably arranged actuator, a magnetic head supported by the actuator, and a magnetic head that moves in the radial direction of a magnetic disk. In a magnetic disk drive including a drive circuit that drives the actuator and a rotation restriction mechanism that restricts rotation of the actuator in a predetermined state, the rotation restriction mechanism is a locking member provided on the actuator. , a rotatable engagement member that is provided near the actuator and has an engagement portion that can engage with the locking member at one end and an action portion at the other end; The engaging member drive mechanism is disposed opposite to each other and is in a non-magnetic force generating state when energized and is in a magnetic force generating state when not energized.

(Function) In the present invention, the rotation regulating mechanism includes a locking member provided on the actuator, an engaging portion provided near the actuator and capable of engaging with the locking member at one end, and an operating portion at the other end. and an engaging member drive mechanism that is disposed opposite to each other across the acting part of the engaging member and is in a non-magnetic force generating state when energized and becomes a magnetic force generating state when not energized. Therefore, the power consumption of the device can be reduced and the temperature inside the device can be prevented from rising.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a plan view for explaining a magnetic disk device according to an embodiment of the present invention.

In the figure, reference numeral 21 indicates an actuator block rotatably disposed on the support shaft 22. .

This actuator block 21 includes a plurality of arms 2.
3.23 is provided, and at the tip of each arm 23,
A magnetic head 25 for writing and reading data on and from the recording surface of each magnetic disk 24 is provided. Further, the actuator block 21 is provided with a voice coil motor 26 that rotationally displaces the actuator block 21 and moves the magnetic head 25 substantially in the radial direction of the magnetic disk 24 (track direction of the recording surface). A stopper 27 is provided on the outer periphery of the actuator block 21. This stopper 27 is arranged in a recess 28a of a stopper block 28 disposed near the actuator block 21, and the rotation range of the actuator block 21 is regulated. It has become so.

Further, a lock piece 29 is provided on the outer periphery of the actuator block 1. A locking mechanism 30, which is a rotation regulating mechanism, is provided near the actuator block 21. An engagement arm 32 is rotatably provided on the support plate 31 of the lock mechanism 30. One end of this engagement arm 32 is provided with an engagement portion 32a that can be engaged with the lock piece 29 described above, and the other end is provided with an action portion 32b. Further, on the support plate 31, engagement arm drive members 33a and 33b are arranged with the action portion 32b of the engagement arm 32 sandwiched therebetween at a predetermined interval. The engagement arm drive members 33a, 33b are
As shown in FIGS. 2 and 3, permanent magnets 34a and 34b formed in a haboko shape, and these permanent magnets 34
Coils 35a and 35 provided on each end side of a and 34b
It consists of b. When the coils 35a, 35b are energized, these engagement arm drive members 33a, 33b interact with the magnetic fields of the permanent magnets 34a, 34b and the coils 35a, 35b.
The magnetic field generated by the permanent magnets 34a and 34b cancel each other out, resulting in a non-magnetic force generation state, and the permanent magnets 34a and 34b generate magnetic force when the coil 35a135b is not energized.

Therefore, when locking the rotation of the actuator block 21, the coil 35 of the engagement arm drive member 33a
a is energized to be in a non-magnetic force generating state, and as shown in FIG.
2 rotates, its engaging portion 32a engages the lock piece 29, and the locked state is maintained. Note that at this time, the coil 35a
energization has been stopped. Further, when the rotation of the actuator block 21 is unlocked, the coil 35b of the engagement arm drive member 33b is energized to be in a non-magnetic force generating state, and as shown in FIG. 32a is a permanent magnet 34a of the engagement arm drive member 33a
The engaging arm 32 rotates as the engaging portion 32
a comes off from the lock piece 29 and the locked state is released. Note that, at this time, the energization of the coil 35b is stopped.

Therefore, in this embodiment, only when locking or unlocking the rotation of the actuator block 21,
Coil 35a of engagement arm drive member 33a or 33b
or 35b, so that the engagement arm 32 is engaged with the lock piece 29 or detached from the two lock pieces, so there is no need to constantly consume power while the device is operating like in the past. , it is possible to reduce the power consumption of the device, and thereby it is possible to prevent a temperature rise inside the device.

In addition, in the embodiment described above, the actuator block 2
Although an example has been described in which the present invention is applied to a rotary type magnetic disk device in which the actuator block 1 rotates, the present invention may also be applied to a linear type magnetic disk device in which the actuator block reciprocates linearly.

[Effects of the Invention] As explained above, in the magnetic disk drive of the present invention, the rotation regulating mechanism includes a locking member provided on the actuator,
A rotatable engagement member that is provided near the actuator and has an engagement part that can engage with the locking member at one end and an action part at the other end, and is arranged to face each other with the action part of the engagement member in between. The mechanism includes an engaging member drive mechanism that generates a non-magnetic force when energized and generates a magnetic force when not energized, which reduces the power consumption of the device and also reduces the temperature rise inside the device. It can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view for explaining a magnetic disk device according to an embodiment of the present invention, and FIGS. 2 and 3 are enlarged plan views of essential parts for explaining the operation of the magnetic disk device shown in FIG. 1, respectively. , FIG. 4 is a plan view for explaining a conventional magnetic disk device, and FIGS. 5 and 6 are enlarged plan views of main parts for explaining the operation of the conventional magnetic disk device shown in FIG. 4, respectively. . 21... Actuator block, 24... Magnetic disk, 25... Magnetic head, 26... Voice coil motor, 29... Lock piece, 30... Lock mechanism, 32... Engagement arm , 32a... engaging portion, 32b
...Action portion, 33a, 33b...Engagement arm drive member. Applicant Toshiba Corporation Toshiba Computer Engineering Co., Ltd. Agent Patent Attorney Sa Suyama - Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A rotatably arranged actuator, a magnetic head supported by the actuator, a drive circuit that drives the actuator to move the magnetic head in the radial direction of the magnetic disk, and In a magnetic disk drive including a rotation regulating mechanism that regulates rotation of the actuator, the rotation regulating mechanism includes a locking member provided on the actuator, and a locking member provided near the actuator and having one end connected to the locking member. A rotatable engagement member having an engageable engagement portion and an action portion at the other end, and a rotatable engagement member that is disposed opposite to each other with the action portion of the engagement member interposed therebetween, and is in a non-magnetic state when energized, and is not energized. What is claimed is: 1. A magnetic disk device comprising: an engaging member drive mechanism that sometimes enters a magnetic force generating state.