JP2500456B2 - Magnetic disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device having a head positioning mechanism.

[0002]

2. Description of the Related Art A conventional magnetic disk device, as shown in FIG. 3, includes a magnetic disk 51 for recording data and a spindle motor 52 for rotating the magnetic disk 51. Further, a head slider 53 for reading and writing data from and to the magnetic disk, a suspension 54 for pressing the head slider 53 against the magnetic disk 51, a drive coil 55 for urging a moving force on the head slider 53, and a suspension 54 are supported. And a carriage mechanism 56 that operates.

The carriage mechanism 56 is rotatably supported by a shaft 57. Furthermore, the magnetic disk device
A magnetic circuit 58 that supplies magnetic flux to the drive coil 55, and a stopper 5 that stops the carriage mechanism 56 at the initial position when stopped.
9A, 59B, lock mechanism 67, and carriage mechanism 5
And a locking portion 68 on the 6 side. The magnetic circuit 58 is located on the opposite side of the carriage mechanism 56 and is rotatably supported by the shaft 57 together with the carriage mechanism 56. Stoppers 59A and 59B are fixedly installed at the ends of the magnetic circuit 58 in the rotating direction. This stopper 5
9A and 59B have rubber cushioning members 60A,
Equipped with 60B.

In the conventional example shown in FIG. 3, the magnetic disk 51 and the head slider 5 are stopped when stopped.
3 is in contact. Further, it is usually set in advance so as to be located on a contact start / stop zone (hereinafter referred to as CSS zone) 69 having excellent contact durability. Further, the stopper 59 is positioned with high precision so as to be stopped at the initial position where the guard band previously recorded on the magnetic disk 51, which is a standard for head positioning, can be read.

Also, the head slider 53 is moved by an external force at the time of stopping as described above, so that the lock mechanism 67 and the locking portion 68 using a magnetic attraction force or mechanical contact so as not to damage the disk 1 are used for the carriage. The mechanism 56 is locked.

During operation, the head slider 53 floats due to the rotating airflow of the magnetic disk 1. The flying posture of the head slider 53 is controlled by the suspension 54 described above. The lock mechanism 17 is released by a control current or the like.

The magnetic head mounted on the head slider 53 seeks for reading and writing predetermined information, and the driving coil 55 and the magnetic circuit 58 generate the force. Also, in case of runaway such as seek error,
A rubber 60 is installed on the stopper 59 to soften the collision force. Further, in order to stabilize the seek at a high speed, it is necessary to make improvements such as making the fluctuation of the external force received by the carriage mechanism 56 uniform and making the fluctuation of the driving force from the driving coil uniform.

[0008]

However, in this conventional magnetic disk device, since the lock mechanism 67 is of the locking system by the attractive force of the magnet or the mechanical contact, the external force acting on the carriage mechanism is increased more than necessary. However, since the locking portion 68 and the lock mechanism 67 are in contact with each other, dust is likely to be generated. Further, since the locking portion 68 is provided, the carriage mechanism 56 has a problem. The mass becomes large, and there is a problem that it becomes an obstacle to speeding up the operation and downsizing the entire device.

[0009]

It is an object of the present invention to improve the disadvantages of the prior art, particularly to effectively stop the carriage mechanism with an appropriate external force with little fluctuation, and to reduce the mass of the carriage mechanism, thereby seeking operation. It is an object of the present invention to provide a magnetic disk device which is designed to be speeded up.

[0010]

According to the present invention, a magnetic disk for storing predetermined information, a magnetic head portion for writing or reading information on the magnetic disk, and the magnetic head portion are supported via a suspension. A carriage mechanism for positioning the magnetic head portion, a drive coil for urging rotational force to the carriage mechanism, a stopper for restricting the rotation range of the carriage mechanism, and a lock mechanism for the magnetic head portion are also provided. .

Then, the lock mechanism is constituted by a through hole formed in the stopper and an intake means for sucking a part of the drive coil on the equipment side through the through hole. There is. This aims to achieve the above-mentioned object.

[0012]

[Operation] When the power is turned off from the time of operation, the carriage mechanism 6 stops at the position where the head slider 3 is on the CSS zone 19 due to wind, self-weight and the like. At this time, the carriage mechanism 6 is in contact with the buffer member 10A. In this state, the self-holding solenoid 13 is fixed to the holding side. This operation is controlled from the main package by the conductor 14. By this operation, the air pressure in the tube 11 is lowered, and a force for sucking the carriage mechanism 6 is generated. The lock can be maintained by improving the sealing performance of the tube 11, the piston 12, the cushioning member 10A, and the carriage mechanism 6. At startup,
By fixing the self-preserving solenoid 13 to the operating side during operation, the air pressure inside the tube 11 rises and the lock is released.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiment shown in FIGS. 1 and 2, a magnetic disk 1 for storing predetermined information, a head slider 3 as a magnetic head unit for writing or reading information on the magnetic disk 1, and a head slider 3 are provided. A carriage mechanism 6 that supports the head slider 3 through the suspension 4 and positions the head slider 3, a drive coil 5 that applies rotational force to the carriage mechanism 6, and stoppers 9A and 9B that limit the movement range of the carriage mechanism 6.
And a lock mechanism 11 for stopping the head slider 3 at the initial position when the operation of the head slider 3 is stopped. The stoppers 9A and 9B are individually provided in the turning direction ahead of the portion of the drive coil 5 located on the opposite side of the carriage mechanism 6, as in the case of the above-described conventional example.

The lock mechanism 11 comprises a through hole 9a formed in the stopper 9A, and an intake means 11 for sucking a part of the drive coil 5 on the side of the equipment through the through hole 9a.

The intake means 11 includes a tube 11A connected to the through hole 9a of the stopper 9A and the tube 1A.
A piston 12 provided in 1A and a self-holding solenoid 13 that reciprocally drives the piston 12 according to an external command.
It is composed of

Further, the stoppers 9A, 9B are equipped with cushioning members 10A, 10B. The through hole 9a described above is provided through the one buffer member 10A. Reference numeral 15 indicates a base plate.

The other structure is the same as that of the conventional example described above.

Next, the operation will be described. When the power is turned off during operation, the carriage mechanism 6 is affected by wind, its own weight, etc.
Stops the head slider 3 at a position above the CSS zone 19. At this time, the carriage mechanism 6 is in contact with the buffer member 10a. In this state, the self-holding solenoid 13 is fixed to the holding side. This operation is controlled from the main package by the conductor 14. By this operation, the air pressure in the tube 11 is lowered, and a force for sucking the carriage mechanism 6 is generated. The lock can be maintained by improving the sealing performance of the tube 11, the piston 12, the rubber 10, and the carriage mechanism 6. By fixing the self-preserving solenoid 13 to the operating side during startup and operation, the air pressure inside the tube 11 rises and the lock is released.

For this reason, in the above-described embodiment, compared to the non-contact type magnet attraction force type, external force fluctuation is not received from the lock mechanism, so that stable head positioning can be performed at high speed, and the buffer member 10A acts. Carriage mechanism 6
The collision force can be effectively mitigated even when the vehicle is suddenly stopped, and at the same time, dust generation at the time of locking can be significantly reduced.

[0020]

Since the present invention is constructed and functions as described above, according to the present invention, the carriage mechanism can be smoothly stopped or started by the action of the intake means in the lock mechanism without imposing an excessive load on the drive coil. Unlike the case of the conventional example described above, it is not necessary to additionally install a member for the carriage mechanism for the lock mechanism, and accordingly, the mass of the carriage mechanism can be effectively reduced by that amount. As a result, the carriage mechanism can be made smaller and lighter, and the seek operation can be performed more quickly, thereby providing an excellent magnetic disk device that has never been used.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory view seen from the direction of arrow A in FIG.

FIG. 3 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

 1 Magnetic Disk 2 Spindle Motor 3 Head Slider as a Magnetic Head 4 Suspension 5 Drive Coil 6 Carriage Mechanism 9A, 9B Stopper 9a Through Holes 10A, 10B Buffer Member 11 Lock Mechanism 11A Tube 12 Piston 13 Self-Hold Solenoid 19 CSS Zone

Claims (3)

(57) [Claims] 1. A magnetic disk for storing predetermined information,
A magnetic head portion for writing or reading information to and from the magnetic disk, a carriage mechanism for supporting the magnetic head portion via a suspension and positioning the magnetic head portion, and a rotational force for urging the carriage mechanism. A magnetic disk device comprising: a drive coil; a stopper that restricts a rotation range of the carriage mechanism; and a lock mechanism that stops the magnetic head unit at an initial position when the operation of the magnetic head unit is stopped. A magnetic disk device comprising: a through hole formed in the stopper; and an intake means for sucking a part of the drive coil on the side of the equipment through the through hole. 2. The intake means comprises a tube connected to a through hole of the stopper, a piston mounted in the tube, and a solenoid for reciprocally driving the piston in response to an external command. The magnetic disk drive according to claim 1. 3. The magnetic disk drive according to claim 1, wherein the stopper is equipped with a cushioning member, and the through hole is formed through the cushioning member.