JPH0330160A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To prevent the danger of falling-off of a head slider even when a hard disk is driven reversely by supporting a supporting spring to a head supporting member while a magnetic head supporting side is tilted in a direction parted from the recording layer forming face of the hard disk sequentially. CONSTITUTION:The free end of a cuntilever supporting spring 2 is slightly tilted in a direction parted from the surface of the hard disk 3 gradually. When the hard disk 3 is slightly driven reversely at the start of a spindle motor, a head slider 4 is drawn in the direction of arrow B with the friction force. However, when the head slider 4 is energized in the direction of arrow B, the cuntilever supporting spring 2 arranged tiltedly generates a clockwise moment around the mounting end to a head base 1b of the supporting spring 2, the free end is energized in the direction of arrow D. Thus, the falling off of the head slider 4 is surely avoided and the possibility of losing the reliability is precluded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head support device, and particularly to a magnetic head support device suitable for a hard disk opening device that uses a sensorless motor as a spindle motor for rotating and moving a hard disk. Regarding.

[Prior Art] A hard disk drive device used as an external storage device for a computer, etc. consists of a hard disk, a spindle motor that rotates and moves the hard disk, a head transfer mechanism that transfers a magnetic head, and a housing that houses these. Basically configured. In this head transfer mechanism, a support spring is connected in a cantilevered manner to a swing arm that is moved by a stepping motor, and a head slider integrated with a magnetic head is attached to the free end of this support spring. It swings open and opens to transport the magnetic head to a predetermined position.

FIG. 3 is an explanatory view of the main parts of a conventional example of this type of hard disk swinging device. It extends diagonally downward to the left. In other words, the cantilevered support spring 2 is tilted in such a way that its free end gradually approaches the surface of the hard disk 3, and the head slider 4 integrated with the magnetic head is attached to the free end of the support spring 2. The magnetic head is placed opposite the surface of the hard disk 3. and,
Hard disk 3 force ■ When not being moved, the heel slider 4 is in contact with the surface of the hard disk 3 due to the elastic force of the support spring 2 (pressure to the row 1), but the hard disk 3 is moved in the direction of the arrow 8 by a spindle motor (not shown). When rotated in direction l\ high speed, the hesodium slider 4
floats above the surface of the hard disk 3, and recording/reproduction is performed in this state.

[Problem to be solved by the invention] By the way, spin, which rotates the hard disk! - Sensor-equipped motors that are equipped with Hall elements to control rotation are generally used as motors, but in recent years, sensorless motors have also been used that omit sensors to simplify the structure and reduce costs. It is now in use. However, in the case of a sensorless motor, the hard disk may be rotated slightly in the opposite direction at startup due to misalignment between the magnetic poles of the coil and the magnet. When the magnetic head 4 rotates in the opposite direction in this manner, as shown in FIG. A moment 1 is generated, which urges the support spring 2 in the direction of arrow C.

As a result, the head slider 4 is strongly pressed against the hard disk 3, resulting in an increase in frictional force, and the connection point 10 between the support spring 2 and the head slider 4 may be damaged. In other words, when a sensorless motor is used as a spindle motor, with the conventional structure, an excessive force is applied to the free end of the support spring during startup, leading to the risk of a serious accident in which the head slider, that is, the magnetic head, falls off. .

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a hard disk doubting device in which there is no risk of the head slider falling off even if the hard disk is forced to rotate in reverse.

[;! Means for Solving the Problem] In order to achieve the above object, the present invention provides a head slider including a magnetic head, a support spring that supports the head slider at one end, and a support spring that swings the other end of the support spring. In a magnetic head support device that supports a head slider with the gap forming side of the magnetic head facing the recording layer forming surface of the hard disk, the support spring is The head is supported by a head support member while being tilted in a direction that gradually moves away from the recording layer of the hard disk.

[Function] With the structure described in Section 2, even if the hard disk rotates in the opposite direction and the bed slider is dragged, the free end of the support spring is biased toward the side opposite to the hard disk, thereby reducing the friction between the head slider and the hard disk. There is no need to worry about undesired increases in force.

[Embodiments] Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is a diagram illustrating the main parts of a magnetic head support device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the internal structure of a hard disk opening device equipped with this magnetic head support device. Portions corresponding to those in FIG. 3 are given the same reference numerals.

In Figures 1 and 2, a hard disk 3 is fixed to a rotating shaft 5 of a spindle motor using a sensorless motor.
The magnetic head is rotated at high speed in the eight directions indicated by the arrow, and the magnetic head disposed facing the surface of the hard disk 3 is transferred to a predetermined position by a head transfer mechanism.

This head transfer mechanism is connected to a stepping motor 6, a swing arm 1 which is oscillated by the stepping motor 6 via a steel belt 7, and a head base of the swing arm 1, and is connected to the upper left diagonally in FIG. A cantilever-shaped support spring 2 extending toward the head and a head slider 4 that integrates a magnetic head and are attached to the free end of the support spring 2.
It is mainly composed of. In this case, the magnetic head support device includes a head slider 4 including a magnetic head and a support spring 2.
When the swing arm 1 is opened about a support shaft 18, the head slider 4 is moved along the surface of the hard disk 3 via the support spring 2. As is clear from FIG. 1, the inclination of the support spring 2 with respect to the hard disk 3 is different from that of the conventional structure, and the free end side of the cantilevered support spring 2 is oriented so as to gradually move away from the surface of the hard disk 3. It is slightly tilted. The reference numeral 8 in FIG. 2 indicates a base plate to which a spindle motor and a head transfer mechanism are attached, and a housing is constituted by this base plate 8 and a lub cover (not shown).

The hard disk fighting device constructed as described above is
When the hard disk 3 is not being moved, the head slider 4 is in contact with the surface of the hard disk 3 under a predetermined load pressure due to the elastic force of the support spring 4. Then, when the hard disk 3 is rotated at high speed in the direction of arrow A by the spindle motor, the hend slider 4 flies up from the surface of the hard disk 3 and recording/reproduction is performed. At this time, if the hard disk 3 is rotated slightly in the reverse direction when the spindle motor (sensorless motor) is started, the hend slider 4 is dragged in the direction of arrow B in FIG. J due to frictional force. However, when the slider 4 is biased in the direction of arrow B, the cantilevered support spring 2, which is tilted as shown in FIG. Since a clockwise moment is generated at the center, the free end side is urged in the direction of arrow D. Thereby, there is no fear that the frictional force between the head slider 4 and the hard disk 3 will increase undesirably. In other words, even if the hard disk 3 is rotated in the reverse direction, the support spring 2 is tilted so that the head slider 4 escapes from the hard disk 3, so that no unreasonable force is applied to the joint between the support spring 2 and the head slider 4. First, a serious accident such as the head slide 4 falling off is reliably avoided.

[Effects of the Invention] As explained above, according to the present invention, even if the hard disk is rotated in reverse, the support spring is tilted so that the head slider escapes from the hard disk. There is no need to worry about undesirably increasing frictional force, and therefore, it is possible to reliably avoid the head slider falling off accident at startup, which was a concern when using a sensorless motor as a spindle motor, and there is no risk of impairing reliability. do not have.

[Brief explanation of drawings]

Fig. 1 is an explanatory view of the main parts of a hard disk movement device according to an embodiment of the present invention, Fig. 2 is a perspective view of the entire hard disk movement device with the top force bar removed, and Fig. 3 is a conventional example. FIG. 2 is an explanatory diagram of main parts of a hard disk opening device. 1...Swing arm, 2...Support spring, 3...Hard disk, 4...Head slider. Figure l Figure 3 A B 3

Claims (1)

[Claims] Consisting of a head slider including a magnetic head, a support spring that supports the head slider at one end, and a head support member that swingably supports the other end of the support spring, the gap forming side of the magnetic head is used for hard disk recording. In a magnetic head support device that supports a head slider facing a layer formation surface, the support spring is supported by the head support member in a state in which the head slider support side is inclined in a direction that gradually separates the head slider support side from the recording layer formation surface of the hard disk. A magnetic head support device characterized by: