JP2730250B2 - 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 device, and more particularly to a small, low-inertia, high-rigidity and simple positioning device. , An improved rotary transducer positioning device.

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 small magnetic disk devices have The arm is also compact and the rigidity can be made sufficiently high, the inertia is small, a large acceleration can be obtained with little electric power, and the device itself can be downsized. Therefore, in particular, using a disk disk of 3.5 inches or less diameter,
In small magnetic disk devices, for example, a rotary transducer positioning mechanism as disclosed in US Pat. No. 4,669,004 has become mainstream.

FIG. 6 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 turning arm for mounting the flexure, and 104 denotes a shaft hole for a turning shaft of the turning arm.

FIG. 7 is a sectional view of a rotary transducer positioning device using such a conventional head assembly, wherein 111 is a disk, 112 is a spindle motor, and 11 is a spindle motor.
3 is a rotating shaft of a rotary type 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. 8 is a top view of the conventional rotary type transducer positioning device shown in FIG. 7, wherein 111 is a disk, 101 is a slider, 102 is a flexure, 103 is a rotating arm, and 113 is a rotating arm. Reference numeral 117 denotes a yoke member of the magnetic circuit of the stator. As described above, the conventional rotary-type transducer positioning device supports and suspends the slider 101 to which the transducer 100 is attached at the tip of the flexure 102, attaches the slider 101 to the rotary arm 103, and cleans the surface of the disk disk 111. Around the rotating shaft 113, a rotor, a permanent magnet, and a rotating actuator constituted by a stator yoke member,
It is configured to freely move in an arc. With such a configuration, the transducer 100 is connected to the disk 111
To access the selected recording track above,
And follow them.

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 mechanism, so that even less power is required. 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. 7, the rotating arm rotates between the stacked disk disks and the space between the disk disks, so that 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. In other words, there is a limit to the number of disk disks that can be stacked on a case having the same thickness. At the same time, this is an obstacle to further reducing inertia.

Although disk devices have been reduced in size year by year, storage capacity has continued to increase. The present invention proposes a new rotary type transducer positioning device that can cope with such contradictory problems.
It is intended to realize compactness, low inertia, and the ability to stack more disk disks, and at the same time, higher rigidity, fewer parts, and simplicity. .

Means for Solving the Problems In order to solve such problems, the transducer positioning device of the present invention has the following configuration. A transducer capable of reproducing at least information on at least one rotatable disk-shaped recording medium; a transducer supporting and suspending the transducer at one end thereof; A flexible plate-shaped support member having a rotor attached and fixed to another end thereof, a stator capable of applying a rotating power to the rotor, and a rotating shaft arranged in the rotating shaft hole, The flexible plate-shaped support member is configured to be rotatable around the rotation axis by the rotor and the stator.

Operation With the configuration described above, the transducer positioning mechanism 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.

Also, the flexure alone tends to be slightly longer,
There is no need to attach the flexure to the rotating arm as in the past, and there is an effect that the rigidity at the mounting part is not easily reduced, and rather high rigidity is obtained as a whole, and there is no manufacturing variation and stable quality is obtained. .

Next, since the rotor coil is directly attached to the flexure as an integral structure, not only the number of parts is reduced and the system is simplified, but also the inertia is further reduced and the rigidity as a whole is increased.

Furthermore, since there is no rotating arm as in the conventional case, not only can the device with a single disk be used to make the housing thinner than in the past, but when laminating, the gap length between the disk disks can be minimized. is there. That is, the number of disks that can be stacked on the same housing can be increased by about 1.5 times, and as a result, the storage capacity can be increased.

In addition, disk drives are becoming smaller and smaller, and the disk diameter is becoming smaller and the housing is becoming thinner year by year, but this mechanism not only has the function of being suitable for thinning, but this mechanism with an integrated flexure There is an advantage that the disk has a structure optimal for miniaturization and 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 slider 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 pivot shaft hole. Reference numeral 6 denotes a rotor, 6a denotes a coil (winding) of the rotor, and 6b denotes a coil frame. A mounting hole 5a for mounting the rotor 6 is provided in the coil mounting portion 5, and a fitting hole 6c is provided in the coil frame 6b of the rotor. Reference numeral 7 denotes a mounting fixing screw which fixes and assembles the flexure 3 and the rotor 6 using the mounting holes 5a and the fitting holes 6c. In the embodiment of FIG. 1, as shown in FIG.
The rotor is assembled so as to sandwich the rotor between two flexures in order to increase rigidity. However,
This is not necessarily a requirement, and it is possible to assemble with only one flexure or, conversely, to assemble with two or more, more flexures to be laminated.

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. Reference numeral 11 denotes at least one laminated disk, 12 denotes a spindle motor, 13 denotes a rotating shaft of a rotary transducer positioning device, 14 denotes a ball bearing, 6 denotes a rotor, 6a denotes a rotor coil, and 7 denotes a rotor coil. A fixing screw 16 is a permanent magnet of the stator, and 17 is a yoke member of a magnetic circuit of the stator. 2 is a slider, 3 is
Is at least one or more laminated flexures.
In FIG. 2, since the assembly shown in FIG. 1 is used as it is, the rotor 6 is assembled by only two opposing flexures, but the number of flexures may be any number as long as it is one or more. Needless to say.

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 14 denotes a ball bearing for allowing the transducer to freely rotate around the rotation shaft 13, reference numeral 16 denotes a permanent magnet of a stator, and reference numeral 17 denotes a yoke member of a magnetic circuit of the stator.

As described above, the rotary transducer positioning device of the present invention supports and suspends the slider 2 to which the transducer 1 is attached at the tip of the flexure 3,
A rotary shaft hole of a rotary type transducer positioning device is directly provided in the rotary shaft, and the rotary shaft is passed through the rotary shaft hole. This is a mechanism that does not use a rotary 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 the rotation shaft hole as the center, and by attaching the rotor coil, the rotational torque is directly applied to the flexure 3. It is composed. In this manner, the flexure itself is freely arc-moved by the rotary actuator constituted by the rotor 6, the permanent magnet 16, and the yoke member 17 of the magnetic circuit of the stator, and the transducer 1 is placed on the disk disk 11. is there,
This allows the selected recording track to be accessed or followed.

FIG. 4 is a perspective view of a head assembly of another embodiment of the 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 slider 2 at one end thereof, and reference numeral 4 denotes a rotation shaft hole provided in the flexure 3. Reference numeral 5 denotes a coil mounting portion of the rotor, which is provided on the flexure 3 at an end different from the end of the slider about the rotation shaft hole. 6
Is a rotor, 6a is a coil (winding) of the rotor, and 6b is a coil frame. A mounting hole 5a for mounting the rotor 6 in the coil mounting portion 5, and a fitting hole 6c in the coil frame 6b of the rotor.
Is provided. Reference numeral 7 denotes a mounting fixing screw.
a, The flexure 3 and the rotor 6 are fixed and assembled using the fitting holes 6c. In the embodiment of FIG. 4, the rotor is assembled so as to sandwich the flexure between the two flexures as shown in the drawing, but this is also to increase the rigidity. However, this is not necessarily a requirement, and it is possible to assemble with only one flexure, or conversely, to assemble with two or more, more flexures to be laminated. .

FIG. 5 is a cross-sectional view of a rotary transducer positioning device using the head assembly of another embodiment of the present invention shown in FIG. Numeral 11 is a disk disk, 2 is a slider, 3 is a flexure, 6 is a rotor, 13 is a rotation axis of a rotary type transducer positioning device, and 14 is a freely rotatable transducer about a rotation axis 13. Ball bearings, 16 are permanent magnets of a stator, and 17 is a yoke member of a magnetic circuit of the stator.

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.

Also, the flexure alone tends to be slightly longer,
It is not necessary to attach the flexure to the rotating arm as in the prior art, and the problem of reduced rigidity at the attachment portion is unlikely to occur. On the contrary, there is no manufacturing variation and stable high-rigidity quality can be obtained.

Next, since the rotor coil is integrally mounted directly on the flexure, not only the number of components is reduced and the system is simplified, but also the inertia is further reduced, and the rigidity as a whole is also increased.

Furthermore, since there is no rotating arm as in the conventional case, not only can the device with a single disk be used to make the housing thinner than in the past, but when laminating, the gap length between the disk disks can be minimized. is there. That is, the number of disks that can be stacked on the same housing can be increased by about 1.5 times, and as a result, the storage capacity can be increased.

Furthermore, disk devices have been miniaturized year by year, and in particular, the disk diameter has been reduced, and the housing has become thinner. This mechanism, which has a flexure that integrates the shaft hole and the coil mounting part of the rotor, has an optimal structure for miniaturization, and allows the disk disk to be reduced in diameter.
As a result, the size of the disk device can be further reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a head assembly according to one embodiment of the rotary transducer positioning device of the present invention, and FIG. 2 is a perspective view of the head assembly using the head assembly of one embodiment of the present invention shown in FIG. FIG. 3 is a top view of the rotary transducer positioning device of the present invention shown in FIG. 2, and FIG. 4 is a cross-sectional view of the rotary transducer positioning device of the present invention. FIG. 5 is a perspective view of a head assembly of another embodiment of the positioning device. FIG. 5 is a cross-sectional view of a rotary transducer positioning device using the head assembly of another embodiment of the present invention shown in FIG. FIG. 6 is a perspective view of a head assembly of a conventional rotary transducer positioning device. FIG. 7 is a sectional view of a rotary transducer positioning device using the conventional head assembly. Figure is a top view of a conventional rotation-type transducer positioner of FIG. 5. 1 ... Transducer, 2 ... Slider, 3 ... Flexure, 4 ... Rotating shaft hole, 5 ... Rotator coil mounting part, 6 ... Rotor, 6a ... Rotor coil, 7 ... Mounting fixing screw, 11… Disc disk, 13… Rotating shaft, 14…
Ball bearing, 16: permanent magnet, 17: yoke member of the magnetic circuit of the stator.

Claims (3)

(57) [Claims] 1. A transducer capable of reproducing at least information on at least one rotatable disk-shaped recording medium, a transducer supported and suspended at one end thereof, a rotating shaft hole, and a rotating shaft hole. A flexible plate-like support member having a rotor mounted and fixed at another end to the driving shaft hole, a stator capable of applying a rotating power to the rotor, and a rotation disposed in the rotation shaft hole A positioning device for a transducer, wherein the flexible plate-shaped support member is rotatable about an axis and the rotation axis by the function of the rotor and the stator. 2. The transducer positioning device according to claim 1, wherein the rotor is mounted and fixed by at least two or more flexible plate-shaped support members. 3. A plurality of disk-shaped recording media are stacked,
And a plurality of flexible plate-shaped support members are arranged so as to correspond to these laminated disks, and are arranged so that their rotation shaft holes are aligned. The transducer positioning device according to claim 1.