JPH03122878A - Loading/unloading mechanism for recording/reproducing head - Google Patents

Abstract

PURPOSE:To move a recording/reproducing head to the outside of the outer circumferential end of a recording medium, to hold it there, to reduce the floating quantity thereof and to urgently retreat it in the case of emergency by making the recording/reproducing head float from the recording medium. CONSTITUTION:Since the lifters 6a and 6b of the recording/reproducing heads 1a and 1b are moved up and down when an actuator arm 5 which moves and positions the heads 1a and 1b is moved to the outside of the outermost circumference of the recording medium 3, they lift the suspensions 2a and 2b of the heads 1a and 1b and make the heads 1a and 1b float from the medium 3. Besides, they move and retreat the heads 1a and 1b to the outside of the area of the medium 3 by sliding them on the lifters 6a and 6b while making them float from the medium 3 and hold them. Thus, the recording/reproducing head can be made to float by as much as a fixed distance from the recording medium within the small area and retreated to the outside of the outer circumference of the disk, besides.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to recording and reproducing in a disk storage device having a recording and reproducing head that can be moved and positioned arbitrarily on a recording medium.
This relates to the loading/unloading mechanism of the playback head.

[Conventional technology]

FIG. 5 is a plan view showing an example of a bed loading/unloading mechanism of a conventional magnetic disk storage device. In the figure, 1 is a recording/reproducing head, and 2 is a suspension supporting this recording/reproducing head l. , 21 is a cam provided on this suspension 2, 3 is a recording medium, 4 is an actuator, 41 is a pot axis as the rotation center of this actuator 4, 6 is a lifter for moving the suspension 2 up and down, 7 is this A link arm that supports the lifter, 71 is a pillar that is the center of rotation of this link arm, 72 is a cam bin provided on link arm 7, 23 is a stopper bin for the lifter 6 in the counterclockwise direction, and 22 is a stopper bin that moves this stopper bin 23 up and down. 24 is a latch cam for holding the lifter 6 near the base of the suspension 2, 24a is a latch cam 24
25 is a latch spring for pulling the latch groove 24a in a certain direction; 26 is a cam release solenoid for releasing the cam bin 72 from the latch 124a; 27
is an unloading spring for pulling the lifter 6 counterclockwise.

Further, FIG. 6 is a perspective view of FIG. 5. Further, FIG. 7 is a diagram showing a conventional contact start/stop method, that is, the CC8 method, in which the recording/reproducing head is not loaded or unloaded. In FIG.

Next, the operation will be explained. In FIG. 5, first, a case will be described in which the recording/reproducing head 1 moves from an unloaded state in which it floats above the recording medium 3 to a loaded state in which the head 1 contacts the medium 3.

The actuator 4 is rotated about the pivot shaft 41 so that the head 1 is positioned at the outermost circumference of the medium 3. Next, the solenoid 22 is energized to project the stopper bin 23, and one of the link arms 7 connected to the lifter 6 is rotated. The actuator 4 is hooked on the bottle 23.
Conversely, rotate it toward the inner circumference. At this time, link arm 7
Since the support column 71 is fixed to the actuator 4,
The link arm 7 is rotated in the opposite direction to the actuator 4, that is, clockwise in FIG. The head l moves in the direction of release, contacts the medium 3, and shifts to the loading state.

On the other hand, a cam bin 72 coupled to a part of the link arm 7
Similarly, the actuator 4 has a rotating support, and the latch 73 (24a) provided on the cam 24, which is preloaded by the cam spring 25, is hooked.Further, the solenoid 22 is released, and the bin 23 is Retract to complete the load operation.

Next, an unloading operation for lifting the head 1 from the medium 3 will be described. When the power of the storage device is turned off, when a current stored in a capacitor (not shown) is applied to the cam release solenoid 26 mounted on the actuator 4, a part of the cam 24 is attracted and the cam 24 is released. By turning clockwise, the cam pin 72 caught in the latch groove 24a is released. Then, the link arm 7 is rotated by the unload spring 27 in a direction in which the lifter 6 approaches the head 1, that is, counterclockwise in FIG. 4, and the head 1 is separated from the recording medium 3, completing the unloading operation. do.

Further, in the conventional C8S system shown in FIG. 7, when starting up the magnetic disk device, the spindle motor 31 is rotated while the recording/reproducing head 1 is kept stationary over the recording medium 3. -Finally, the head 1 is kept stationary on the inner circumference side above the medium 3.At first, the head 1 is rubbing on the medium 3, but when the rotation speed exceeds a certain level, the air bearing effect causes the head to begins to float on medium 3. During steady rotation of the spindle motor, it floats at a constant height of 0.21111Nf&. Furthermore, when the magnetic disk drive is stopped, the head 1 starts to come into contact with the medium 3 when the spindle motor's steady rotation is reduced to a certain constant rotation speed, and the head 1 and the medium 3 remain in a rubbing state until the spindle motor stops. be.

Therefore, in order to shorten the sliding distance, efforts are being made to actively stop the spindle motor.

[Problem to be solved by the invention]

Since the conventional Herad load/unload mechanism is configured as described above, it has a large number of parts, and it is necessary to secure a wide area for the components and the area in which the lifter for unloading the recording/playback head moves. is required, and
Sequence operations are required to move each part in a fixed order, which increases the uncertainty of operation and increases the failure rate. Furthermore, there are other problems such as the assembly is complicated and the device cannot be made at low cost.

On the other hand, in the conventional C8S method, as the height at which the recording/reproducing head flies above the recording medium decreases, the number of times C8S can be performed, that is, the life span, decreases, and the higher the recording density, the more it is necessary to reduce the flying height. This increases the distance that the head and medium must rub against each other, which increases the problem. Furthermore, since the head is in direct contact with the medium, there are limits to vibration and shock resistance during non-operation. Also,
As the number of discs used as recording media increases and the contact resistance with the recording/reproducing head increases, a spindle motor with a correspondingly larger starting torque is required. Furthermore, in this method, when the spindle motor is started, it is not possible to rotate the spindle motor in the opposite direction to the normal rotational direction, so a somewhat accurate angular position detection means is required in the spindle motor drive circuit.

Furthermore, there was also a need for a means to reduce the coasting time of the spindle motor when the power is cut off.

This invention was made to solve the above-mentioned problems, and it is possible to reduce the number of components and also to float the recording/reproducing head a certain distance above the recording medium within a narrow area. A further object of the present invention is to provide a loading/unloading mechanism for a recording/reproducing head that can retract the recording/reproducing head outside the outer periphery of a disk serving as a recording medium.

[Means to solve the problem]

The recording/reproducing head loading/unloading mechanism according to the present invention has a structure in which the suspension of the recording/reproducing head is lifted by moving a lifter up and down, thereby lifting the recording/reproducing head above the recording medium. Furthermore, the suspension of the recording/reproducing head is moved on the lifter to move it out of the recording medium. Furthermore, the above-mentioned lifter is capable of recording and
It is moved by a part of the actuator arm that moves and positions the playback head.

[Effect]

The lifter of the recording/reproducing head in this invention
When the actuator arm that moves and positions the reproducing head moves beyond the outermost periphery of the recording medium, it is moved up and down to lift the suspension of the head and lift the head above the recording medium. Further, the head is slid on a lifter while floating above the recording medium, and the head is moved and retracted out of the area of the recording medium and held.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, la and lb are recording/reproducing heads, 2a,
2b is a suspension supporting the recording/reproducing heads la and lb; 3 is a recording medium; 4 is an actuator;
5 is an arm coupled to this actuator 4, 6
a and 6b are rod-shaped lifters for moving the suspensions 2a and 2b up and down, ? a and 7b are link arms that support lifters 6a and 6b; 8a and 8b are link arms 7a;
9 is a stand that supports the link arms 7a, 7b and the spring 8; 10 is a support for the link arm; and 11 is a stopper for the arm 5.

Next, the operation will be explained. First, the unloading operation will be explained. As shown in FIG. 1, when the actuator 4 is driven clockwise and the recording/reproducing heads la, lb approach the outer peripheral edge of the recording medium 3, the arm 5, which has a cam structure at the tip, moves toward the outer edge of the recording medium 3. two link arms 7a,
7b, both link arms 7a, 7b are rotated around the support column attached to the support base 9 of the link arms, the lifters 6a, 6b are moved up and down, and the suspensions 2a, 2b are lifted. Then, the recording/reproducing heads la and lb lift up a certain distance from the recording medium 3, and the arm 5 hits the stopper 11.
The two link arms 7a and 7b fit into the gap provided at the tip of the arm 5, resulting in a latched state. At this time, the heads la and Ib move in a floating state from the recording medium 3 and retreat further outside the outer peripheral edge of the recording medium 3.
This operation is performed when the magnetic disk storage device is stopped or in an emergency when some kind of abnormality occurs.

Next, the loading operation will be explained. When the actuator 4 is driven counterclockwise from the unloaded state as described above, the link arm 7a.

7b and the arm 5 are released from the latch state, and by performing an operation completely opposite to the unloading operation, the heads la and lb enter the loading state.

In the above embodiment, the case where the actuator 4 for moving and positioning the recording/reproducing head 1 is of a swing type is explained, but it may be a linear drive type.

Further, in the above embodiment, the case where the lifter is rod-shaped has been described, but it may be a plate-shaped lifter.

Furthermore, in the above embodiment, there is a case where there is one recording medium and two recording/reproducing heads (although the explanation is given using two, as shown in FIG. 4, there is a case where there is one or more recording media and two or more heads. In this case, the link arms 7c, 7d, and 7e have the same effect as the above embodiment.

7f into gear mechanism 73c, 73d, 73e, 73f
For example, when moving only the part 73f of the gear mechanism with the actuator 4, the other link arm 7c
, 7d, and 7e can be linked together. In addition, the fourth
In the figure, lc, ld, le, If are recording/reproducing heads, 2c, 2d, 2e, 2f are suspensions, 3a, 3b are recording media, 6c, 6d, 6e
, 6f is a lifter.

〔Effect of the invention〕

As described above, according to the present invention, since the recording/reproducing head is configured to float above the recording medium, the life of the storage device is extended and high reliability can be obtained.

Further, since the head is moved and held outside the outer peripheral edge of the medium, the amount of floating is small, and high impact resistance can be obtained.

In addition, by evacuating immediately in the event of an emergency, the data recorded on the medium will not be destroyed.

Furthermore, the damping distance at the time of runaway is not affected by the margin distance of the medium, so it can be set large and the deceleration can be reduced.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a plan view showing a head loading/unloading mechanism according to an embodiment of the present invention, FIGS. 2 and 3 are sectional views taken along line I-n in FIG. Fig. 4 is a sectional view of a head loading/unloading mechanism showing another embodiment of the present invention, Fig. 5 is a plan view showing a conventional head loading/unloading mechanism, and Fig. 6 is a perspective view of Fig. 5 above. 7 are perspective views showing a conventional contact start/stop method. In the figure, la to 1f are recording/reproducing heads, 2a to 2f are suspensions, 3.3a and 3b are recording media, 4 is an actuator, 5 is a lifter driving arm, 6a to 6f are lifters, ? a to 7f are link arms, 8a and 8b are springs,
9 is the stand of the link arm, lO is the support of the link arm, 1
1 is a stopper for the lifter driving arm. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In a disk storage device having a recording/reproducing head that can be moved and positioned arbitrarily on a recording medium, the suspension of the recording/reproducing head is bent by raising and lowering a rod or plate-shaped lifter, and the above-mentioned recording material held at the tip of the suspension is bent.・Loading of the recording/playback head, which is characterized by raising the playback head a certain distance from the recording medium.
Unloading mechanism.