JPH03201279A - Positioning device for transducer - Google Patents

Abstract

PURPOSE:To make a device easy to assemble and to increase the access speed by laminating plural flexible plate-shaped supporting members directly provided with revolving shaft holes and arranging a revolving shaft in these revolving shaft holes. CONSTITUTION:A slider 2 to which a transducer 1 is attached is supported and suspended at the front end of a flexure 3 and is directly provided with a revolving shaft hole 4 of a positioning device, and the revolving shaft is inserted through the revolving shaft hole. A coil attaching part 6b of a rotor 6 is provided on the side opposite to the slider 2 of the flexure 3 with the revolving shaft hole 4 as the center, and a rotor coil 6a is attached to directly apply the rotation torque to the flexure 3. Thus, the number of parts is small and the device is simple and is easy to assemble because turning arms are not provided, and a high acceleration is obtained with a small power because of a low inertia, and the access speed is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a positioning device for a transducer that is freely accessible to a disk-shaped data storage medium such as a disk drive, and particularly to a compact, low-inertia, and improved rotation device. Conventional technology related to positioning devices for conventional transducers such as small-sized magnetic disk devices. Typical types of conventional transducer positioning devices such as small magnetic disk devices are rotary type and linear linear type. Conventional
There was a problem with the mechanical rigidity of the arm, and it was inferior in terms of high-speed method track following compared to linear linear type. It has become possible to obtain small inertia, large acceleration with little electric power, and the device itself can be made smaller.
In particular, for small magnetic disk devices using disks with a diameter of 3.5 inches or less, USP 4,669,00
4 is a perspective view of the head assembly of such a conventional rotary transducer positioning device,
100 is a transducer, and 101 is a slider (Sl1dar) to which the transducer is attached, which is a member that slides on the surface of the disk while maintaining a small gap.
102 is a flexible support member (Flexure) for suspending the slider; 103 is a rotating arm to which this flexure is attached; and 104 is a shaft hole for the rotation axis of this rotating arm.

FIG. 5 is a cross-sectional view of a rotary type transducer positioning device using such a conventional head assembly, in which 111 is a disk circle, 112 is a spindle shape, and 113 is a rotation of a rotary type transducer positioning device. *IL 114 is Paul Bearin v 11
5 is a rotor coil/kl 16 is a permanent magnet. 117 is a yoke member of the magnetic circuit of the stator. 101 is a slider, 102 is a flexure, and 103 is a rotating arm; FIG. 6 is a top view of the conventional rotating transducer positioning device shown in FIG.
1 is a disk circle a, 101 is a slider, 102 is a flexure, 103 is a rotating arc k, 113 is a rotary type transducer positioning device, and a rotating wheel 117 is a yoke member of a stator magnetic circuit. A slider 101 with a transducer 100 attached thereto is supported and suspended on the tip of a flexure 102. This is attached to a rotating arm 103, and the surface of a disc 111 is rotated on a rotating shaft 113.
It is configured to freely move in an arc around the center using a rotary actuator consisting of a rotor, a permanent magnet, and a stator yoke member. This configuration allows the transducer 100 to access and follow selected recording tracks on the disk 111.

The advantages of the conventional rotary transducer positioning device as described above are that the rotary arm can be made compact and highly rigid, and the inertia can be lower than that of a linear type positioning device, so it can achieve high acceleration with low power consumption. It is also possible to obtain faster access speeds.
In addition, it is important to note that the device itself can be made smaller and lighter, which is a problem that the invention aims to solve.
A certain amount of space is required between the stacked disks to rotate by entering between the gaps between the disks. The rotating arm must have a minimum thickness in order to fix the flexure and maintain its own rigidity.Although this may limit the number of disks that can be stacked, this means that they can be stacked in the same mounting body. The number of disks is limited, and this also poses an obstacle when trying to further reduce the inertia.

Although disk devices are becoming smaller and smaller year by year, and storage capacity is increasing, the present invention proposes a new rotary transducer positioning device that addresses these contradictory issues. more than before
It has low inertia and allows more disks to be stacked.

Means for Solving the Problems In order to solve the above problems, the transducer positioning device of the present invention has the following configuration. A transducer capable of at least reproducing the above information is supported and suspended at one end of the transducer, and at the same time a plurality of flexible plate-shaped support members with direct rotation shaft holes are laminated, and the rotation shafts are placed in these rotation shaft holes. Even if the laminated flexible plate-shaped support members are configured to be rotatable around the rotation axis, the transducer positioning device of the present invention has the following functions. It is something that has.

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

Secondly, it has the effect of being able to obtain a large acceleration with less electric power than the conventional one, and as a result, the access speed can be increased.

Secondly, the strength of the flexure itself tends to be a little long.There is no need to attach the flexure to the rotating arm as in the past, and the installation has the effect of reducing the rigidity of the part, which reduces manufacturing variations. , stable quality can be obtained.

In addition, since there is no rotating arm like in the past, it is possible to minimize the gap length between the disks, and the number of disks that can be stacked on the same stack can be increased by about 1.5 times. As a result, storage capacity can be increased.

Furthermore, disk devices are becoming smaller year by year, especially the disk diameter.The Tsumegi device, which has a thinner mounting body, not only has the effect of being suitable for thinning, but also this device with an integrated flexure has become smaller. The disk disk can be made smaller in diameter, and as a result, the disk device can be further downsized.

EXAMPLE A transducer positioning device according to an embodiment of the present invention will be described below with reference to the drawings. Figure 14 = I, 1
2 is a transducer, and 2 is a slider to which the transducer is attached, which is a member that slides on the surface of the disk while maintaining a small gap (for example, 0.1 μm). 3 is a flexible plate-shaped support member (Flexure) that suspends the slider 2 at one end thereof.
, 4 (Yo) This is the rotary shaft hole provided in this flexure 3. 5 G& Similarly, in the flexure 3, the coil of the rotor provided on the opposite side of the slider with the rotation shaft hole as the center is installed. 6 is a rotor, 6a is a coil (winding) of the rotor, and 6b is a coil frame.

FIG. 2 (above) is a cross-sectional view of a direct-acting type transducer positioning device using the head assembly of one embodiment of the present invention shown in FIG. The rotation of the dynamic transducer positioning device 1dl14 is a ball bearing, 6a
is rotor coil) I<16 is permanent magnetism; 5. 17 is a yoke member of the magnetic circuit of the stator. 2 is a slider, and 3 is a flexible.

3C-L is a top view of the rotary transducer positioning device of the present invention shown in FIG. 2, in which 11 is a disk circle a, 2 is a slider, 3 is a flexure, 13
Rotation 11 of the rotary transducer positioning device
&17j The rotary type transducer positioning device of the present invention is also used for the yoke member of the stator magnetic circuit (the slider 2 to which the transducer 1 is attached is supported and suspended on the tip of the flexure 3, and at the same time, the yoke member of the stator magnetic circuit is rotated directly). The rotary shaft hole of the positioning device of the dynamic transducer is provided, and the rotary shaft is passed through this hole, so even if the device does not use a rotary arm like the conventional example, there is still a rotary shaft hole in the flexure 3. The rotor coil installation is done by installing the rotor coil on the opposite side of the slider.
Even if the configuration is such that direct rotational torque is applied to the flexure 3, the rotor 6, the permanent magnet 16,
A rotary actuator constituted by the yoke member 17 of the stator allows the flexure itself to move freely in an arc, allowing the transducer 1 to access or follow a selected recording track on the disk 11. Effects of the Invention The transducer positioning device of the present invention has the following excellent effects by virtue of the configuration described above.

First of all, since there is virtually no rotating arm like in the past, the number of parts is small and simple, making it easy to assemble. Although it can be done quickly, the flexure itself tends to be a little long.There is no need to attach the flexure to the rotating arm as in the past, and the problem of lowering the rigidity at the attachment part is less likely to occur, and it is easier to manufacture. There is no variation and stable quality can be obtained.

In addition, unlike conventional models, there is no rotating arm.It is possible to minimize the gap length of the disks, and the number of disks that can be stacked on the same giant body is +L.1. The storage capacity can be increased by about 5 times, and as a result, the storage capacity can be increased.

Furthermore, disk devices are becoming smaller and smaller year by year (L), especially the disk diameter is small (T). This device has a flexure that integrates the rotor coil mounting section and the rotor coil attachment section, and has a structure that is ideal for downsizing.The diameter of the disk disk can be reduced, and as a result, the disk device can be further downsized. I can do it.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the head assembly of an embodiment of the rotary transducer positioning device of the present invention.
Figures (see Figure 1) A cross section of a positioning device for a rotary transducer using the head assembly of an embodiment of the present invention shown in Figure 1; Figure 3 (Figure 2) The top surface of the positioning device is shown in Figure 4 (
The perspective view of the head assembly of the conventional rotary transducer positioning device is shown in Figure 5C, and the cross section of the rotary transducer positioning device using the conventional head assembly is shown in Figure 6ζ. FIG. 2 is a top view of a rotary transducer positioning device. 1...Transducer, 2...Slider, 3...
...Flexier, 4. -Rotating shaft hole 6..Rotor,
6a...Rotor carp/kll...Disc rotor
13... Rotation [14. Ball bearing, 16.
・Permanent magnet 17...Stator yoke stock

Claims (1)

[Claims] A transducer capable of reproducing at least information on a plurality of rotatable stacked disc-shaped recording media is supported and suspended at one end thereof, and at the same time, a plurality of flexible plate-shaped support members each having a rotary shaft hole are provided. The laminated flexible plate-shaped support members are laminated, and the rotating shafts are disposed in the rotating shaft holes, so that the laminated flexible plate-like support members can freely rotate around the rotating shafts. Transducer positioning device.