JP2789770B2 - Transducer positioning device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for a transducer capable of freely accessing a disk-shaped data recording medium such as a disk drive, and more particularly, to a small, low-inertia, improved rotation device. The present invention relates to a positioning device for a dynamic transducer.

2. Description of the Related Art Conventionally, a rotary type and a linear linear type are typical examples of transducer positioning devices such as small magnetic disk devices. Conventionally, a rotary type positioning device has a problem in mechanical rigidity of an arm, and is inferior in terms of high speed, track followability, etc. as compared with a linear linear type, but in recent years, in a small magnetic disk device, The arm is also compact and the rigidity can be made sufficiently high, the inertia is small, a large acceleration can be obtained with a small amount of power, and the device itself can be downsized. Therefore, in particular, using a disk disk of 3.5 inches or less diameter,
For small magnetic disk devices, for example, a rotary type transducer positioning device as disclosed in US Pat. No. 4,669,004 has become mainstream.

FIG. 4 is a perspective view of a head assembly of such a conventional rotary transducer positioning device,
Reference numeral 100 denotes a transducer, and 101 denotes a slider to which the transducer is attached, which slides on the surface of the disk while maintaining a small gap. 102 is a flexible supporting member (Flexure) for suspending the slider, 10
Reference numeral 3 denotes a rotation arm for mounting the flexure, and reference numeral 104 denotes a shaft hole for a rotation shaft of the rotation arm.

FIG. 5 is a sectional view of a rotary transducer positioning device using such a conventional head assembly. Reference numeral 111 denotes a disk, 112 denotes a spindle motor, and 11 denotes a spindle motor.
3 is a rotating shaft of a rotary transducer positioning device, 114 is a ball bearing, 115 is a rotor coil, 11
Reference numeral 6 denotes a permanent magnet, and 117 denotes a yoke member of a magnetic circuit of the stator. Reference numeral 101 denotes a slider, 102 denotes a flexure, and 103 denotes a rotating arm.

FIG. 6 is a top view of the conventional rotary transducer positioning device shown in FIG. 5, wherein 111 is a disk, 101 is a slider, 102 is a flexure, 103 is a rotating arm, and 113 is a rotating arm. The rotational axis of the positioning device of the type transducer, 117 is a yoke member of the stator magnetic circuit.
As described above, the conventional rotary-type transducer positioning device includes the slider 1 on which the transducer 100 is mounted.
01 is supported and suspended at the tip of a flexure 102, and this is attached to a rotating arm 103, and the surface of the disk disk 111 is turned around a rotation shaft 113 by a rotor, a permanent magnet, and a stator yoke member. The dynamic actuator is configured to freely move in an arc. With such a configuration, the transducer 100 can access or follow a selected recording track on the disk 111.

The advantages of the conventional rotary type transducer positioning device as described above are that the rotary arm can be made compact and highly rigid, and the inertia can be made lower than that of the linear type positioning device. The point is that a large acceleration can be obtained and the access speed can be increased. In addition, it cannot be overlooked that the device itself can be reduced in size and weight.

Problems to be Solved by the Invention As can be understood from FIG. 5, since the rotating arm rotates between the stacked disk disks and the space between the disk disks, a fixed space is formed between the disks. is necessary. The pivot arm needs a minimum thickness to fix the flexure and to maintain its rigidity, which limits the number of stacked disk disks. That is, the number of disk disks that can be stacked on the same housing is limited. Alternatively, even in the case of a single disk, there is a limit to further reducing the thickness of the housing. Furthermore, at the same time, this also causes obstacles when trying to further reduce the inertia.

Disk devices are becoming smaller and thinner year by year, but their storage capacities are steadily increasing. The present invention proposes a new rotary-type transducer positioning device that responds to such contradictory problems, and has a lower inertia than before, and a lamination of more disk disks. Or, in the case of one disk, it is possible to make the disk thinner than before.

Means for Solving the Problems In order to solve such problems, the transducer positioning device of the present invention has the following configuration.

That is, a transducer capable of at least reproducing information on one rotatable disk-shaped recording medium is supported and suspended at one end thereof, and at the same time, a flexible plate-shaped support member provided with a rotation shaft hole is provided. A rotating shaft disposed in the rotating shaft hole, and the flexible plate-shaped support member is configured to be rotatable around the rotating shaft.

Operation With the configuration described above, the transducer positioning device of the present invention has the following operation.

First, since there is substantially no conventional rotating arm, there is an effect that the number of parts is small and the operation is simple, and as a result, there is an advantage that, for example, assembly is easy.

Next, since the inertia can be made lower than before, a large acceleration can be obtained with a small amount of power, and as a result, the access speed can be increased.

Next, the flexure itself tends to be slightly longer, but there is no need to attach the flexure to the rotating arm as before, and there is an effect that the rigidity at the attachment part is not easily reduced, and rather there is no manufacturing variation, Stable quality is obtained.

Furthermore, since there is no rotating arm as in the prior art, it is possible to minimize the gap length of the disk disk, and the number of disk disks that can be stacked in the same housing can be increased by about 1.5 times. As a result, the storage capacity can be increased.

Furthermore, since there is no rotating arm as in the prior art, the thickness can be reduced, and the thickness of the housing of the disk device can be reduced to the utmost even when only one disk is used.

In addition, disk drives are becoming smaller year by year, especially with smaller disk diameters and thinner housings.This mechanism not only has the function of being suitable for thinning, but this mechanism with an integrated flexure It has an optimal structure for miniaturization,
There is an effect that the diameter of the disk can be reduced, and as a result, the disk device can be further reduced in size.

Embodiment A transducer positioning device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a head assembly of an embodiment of a rotary transducer positioning device according to the present invention. In the figure, reference numeral 1 denotes a transducer, and 2 denotes a slider to which the transducer is attached, which slides on the surface of the disk while maintaining a small gap (for example, 0.1 μm). Reference numeral 3 denotes a flexible plate-shaped support member (flexure) for suspending the disk 2 at one end thereof, and reference numeral 4 denotes a rotation shaft hole provided in the flexure 3. Numeral 5 is a coil mounting portion of the rotor provided on the flexure 3 on the opposite side of the slider about the rotation shaft hole. Reference numeral 6 denotes a rotor, 6a denotes a coil (winding) of the rotor, and 6b denotes a coil frame.

FIG. 2 is a sectional view of a rotary transducer positioning device using the head assembly according to the embodiment of the present invention shown in FIG. 11 is a disk disk, 12 is a spindle motor, 13 is a rotating shaft of a rotary transducer positioning device, 14 is a ball bearing, 6a is a rotor coil, 16 is a permanent magnet, and 17 is a yoke of a magnetic circuit of a stator. It is a member. Reference numeral 2 denotes a slider, and 2 denotes a flexure.
Here, a configuration is shown in which a plurality of disk disks are stacked and rotated, but one disk may be used. Also, one flexure may be used.

FIG. 3 is a top view of the rotary transducer positioning device of the present invention shown in FIG. 2, wherein 11 is a disk, 2 is a slider, 3 is a flexure, and 13 is a rotary transducer positioning device. Reference numeral 17 denotes a yoke member of the stator magnetic circuit.

As described above, the rotary type transducer positioning apparatus of the present invention supports and suspends the slider 2 to which the transducer 1 is attached at the tip of the flexure 3 and at the same time, directly connects the slider 2 with the rotary type transducer positioning apparatus. A rotating shaft hole is provided, and the rotating shaft is passed through the hole. This is a mechanism that does not use a rotating arm as in the conventional example. Further, the flexure 3 is provided with a coil mounting portion for the rotor at a portion opposite to the slider with respect to the rotation shaft hole as a center, and by attaching the rotor coil, the rotational torque is directly applied to the flexure 3. Make up. In this manner, the flexure itself is freely moved in an arc by the rotary actuator constituted by the rotor 6, the permanent magnet 16, and the yoke member 17 of the stator, and the transducer 1 is placed on the disk disk 11, To be able to access or follow the recorded recording track.

Effects of the Invention The transducer positioning device of the present invention has the following excellent effects by the configuration described above.

First, since there is substantially no conventional rotating arm, the number of parts is small and simple, and assembly is easy.

Next, since the inertia can be made lower than before, a large acceleration can be obtained with a small amount of power, and the access speed can be increased.

Next, the flexure itself tends to be slightly longer, but there is no need to attach the flexure to the rotating arm as in the past, and the problem of reduced rigidity at the attachment part does not easily occur. Quality is obtained.

Furthermore, since there is no rotating arm as before, the gap length of the disk can be reduced to the limit, and the number of disks that can be stacked in the same housing can be increased by about 1.5 times. As a result, the storage capacity can be increased.

Furthermore, since there is no rotating arm as in the prior art, the thickness can be reduced, and the thickness of the housing of the disk device can be reduced to the utmost even when only one disk is used.

Furthermore, disk devices are becoming smaller year by year, and in particular, the disk diameter is becoming smaller and the housing is becoming thinner. However, this mechanism is not only suitable for thinning, but also the slider support suspension part, rotating shaft This mechanism, which has a flexure that integrates the holes and the coil mounting part of the rotor, has an optimal structure for miniaturization, and allows the disk disk to be reduced in diameter, resulting in a further reduction in the size of the disk drive. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a head assembly according to an embodiment of a rotary type transducer positioning apparatus of the present invention, and FIG. 2 is a rotary type transducer positioning apparatus using the head assembly of the embodiment. 3 is a sectional view of FIG.
FIG. 4 is a top view of a rotary transducer positioning device of the present invention shown in FIG. 4; FIG. 4 is a perspective view of a head assembly of a conventional rotary transducer positioning device;
FIG. 1 is a sectional view of a conventional rotary transducer positioning device using a head assembly, and FIG. 6 is a top view of the conventional rotary transducer positioning device shown in FIG. 1 ... Transducer, 2 ... Slider, 3 ... Flexure, 4 ... Rotating shaft hole, 6 ... Rotor, 6a ... Rotor coil, 11 ... Disc disk, 13 ... Rotating shaft, 14 ... …
Ball bearing, 16 permanent magnet, 17 stator yoke member.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 21/02

Claims (1)

(57) [Claims] 1. A flexible plate-shaped support member, which supports and suspends at one end a transducer capable of at least reproducing information on one rotatable disk-shaped recording medium, and at the same time, has a rotary shaft hole. And a rotary shaft disposed in the rotary shaft hole, wherein the flexible plate-shaped support member is rotatable about the rotary shaft.