JPH09219076A - Suspension mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the off-track of a magnetic disk device and also to prevent breackings of wirings, etc. SOLUTION: In this suspension mechanism provided with a flat plate shaped gimbal member 1 holding a magnetic head slider, the gimbal member 1 has a main body part 6 in which two arms 2 are fitted projectingly on the same plane, a slider mounting part 3 arranged between the two arms 2 and provided with the magnetic head slider and a supporting part 5 connected to both tips of the two arms 2 and also supporting tip side parts of the slider mounting part 3. Here, two erect parts 4 almost perpendicular to the flat plane of the gimbal member 1 are fitted to both sides of the supporting part 5, and the lengths of the erect parts 4 in the direction along the arms 2 are set to be longer a little than that of the supporting part 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension mechanism, and more particularly to a suspension mechanism suitable for holding a slider of a magnetic disk device.

[0002]

2. Description of the Related Art A conventional example of a magnetic disk device 100 equipped with a suspension mechanism 50 is shown in FIG. The magnetic disk device 100 includes a magnetic disk mounting portion (not shown) that is equipped with a magnetic disk D and rotates, a magnetic head slider 101 that includes a magnetic head that reads from or writes to the magnetic disk D, and the magnetic disk slider 101. Head slider 1
01 through the suspension mechanism 50, and a rotatable arm 102 for urging the magnetic head slider 101 to move the magnetic disk D substantially in the radial direction, and the rotatable arm 102. And a drive means 103 for urging the rotational movement.

With the above structure, in the conventional magnetic disk device 100, when reading or writing the recorded information from the magnetic disk D, the suspension mechanism is rotated by the rotating arm 102 which is urged to rotate by the driving means 103. The magnetic head slider 101 is urged to move in the radial direction of the magnetic disk D via 50 and accessed.

Here, with the recent increase in the density of the magnetic disk D, highly accurate movement is required for accessing the magnetic head slider 101. For example, the rotating arm 10
There has been a demand for measures to prevent off-track due to minute vibrations derived from the biasing of the rotational movement by 2.

Two arrows shown in FIG. 2 indicate the magnetic head slider 10 which is biased by the rotating arm 102.
The radial direction X and the tangential direction Y of the rotating motion of No. 1 are shown. A magnetic head slider 10 having a structure in which a magnetic disk D that rotates at high speed is floated on the surface of the disk and moved.
The rigidity of the suspension mechanism 50 supporting 1 is
If the magnetic head slider 101 becomes higher in the rotational direction about the radial direction X (rolling direction) and the rotational direction about the tangential direction Y (pitching direction), the followability of the magnetic head slider 101 is lowered, and its rigidity is relaxed to some extent. Is desirable.

On the other hand, in order to prevent the above-mentioned off-track, it is required that the suspension mechanism 50 has rigidity to suppress reciprocal vibration along the tangential direction Y (yaw direction).

The conventional suspension mechanism 50 has a flat gimbal member 6 for holding the magnetic head slider 101.
0, the gimbal member 60 and the magnetic disk device 100
And a load beam 51 disposed between the rotary arm 102 of the positioner mechanism of FIG.

Further, as shown in FIG. 5, the gimbal member 60 is disposed between a main body 66 having two arms 62 projecting on the same plane and the two arms 62, and a magnetic head slider. A slider mounting portion 63 equipped with 101;
It has a support part 65 that is connected to both ends of the two arms 62 and supports the tip end side of the slider mounting part 63.

A wide portion 64 is provided from each end of the support portion 65 to the middle of each arm 62.

The structure in which the magnetic head slider 101 is mounted via the support portion 65 and the slider mounting portion 63 which are connected to both tip portions of the two arms 62 extending toward the above-mentioned tip ends is constructed by these arms 62. And slider mounting portion 63
It is intended to reduce the rigidity in the rolling direction and the pitching direction described above by the elastic effect of the.

Further, the two wide portions 64 increase the rigidity in the yawing direction described above.

[0012]

As described above, in the gimbal member of the conventional suspension mechanism, the wide portion provided from the supporting portion to the arm enhances the rigidity in the yawing direction, and at the same time, it increases the rigidity in the rolling direction. The rigidity in the pitching direction is also increased, and the following capability of the magnetic head slider mounted on this is deteriorated.

Further, a lead wire arranged along the load beam extends from the magnetic head mounted on the magnetic head slider held by the conventional suspension mechanism, and the wide portion of the suspension mechanism is the lead wire. However, there is a problem in that the lead wire is easily broken due to the contact with the wire.

Further, due to the wide portion, there is an inconvenience that the wiring of the lead wire is obstructed during the work of mounting the magnetic head slider and the workability is deteriorated.

[0015]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly reliable suspension mechanism which improves the disadvantages of the prior art, prevents off-track of a magnetic disk device and prevents wiring breakage. To do.

[0016]

According to a first aspect of the present invention, in a suspension mechanism including a flat gimbal member for holding a magnetic head slider, the gimbal member projects two arms on the same plane. Installed main body part, slider mounting part that is installed between two arms and equipped with a magnetic head slider, and is connected to the tips of both arms and supports the tip side of the slider mounting part. And a supporting portion for

Then, two rising portions which are substantially perpendicular to the flat surface of the gimbal member are provided on both sides of the supporting portion, and the length of each of these rising portions in the direction along the arm is more than that of the supporting portion. The configuration is set to be longer for a minute.

In the suspension mechanism having the above structure, the main body of the gimbal member is mounted on the rotary end of the rotary arm of the positioner mechanism of the magnetic disk device via the load beam. At this time, the support part side becomes the turning end,
A magnetic head slider equipped with a magnetic head is mounted on the slider mounting portion supported by the supporting portion. And
The magnetic disk is accessed as the rotary arm rotates.

According to the second aspect of the invention, the length of each rising portion is set to be 15% of the total length of the arm from the supporting portion.

As in the first aspect of the invention, the magnetic disk device is equipped with the same access operation of the magnetic head.

The invention according to claim 3 has the same structure as that of the invention according to claim 2, and adopts a structure in which the gimbal member is formed from a single metal plate.

That is, the rising portion is formed by bending a single metal plate processed into a predetermined shape, and the slider mounting portion is formed by the slits provided along the periphery of the slider mounting portion. Arm members are formed on both ends of the slider mounting portion.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration diagram of a magnetic disk device 20 equipped with a suspension mechanism 10 according to the present invention.

The magnetic disk device 20 includes a magnetic disk D.
Equipped with a magnetic disk mounting part (not shown) that rotates,
A magnetic head slider 21 having a magnetic head for reading from or writing to the magnetic disk D, and the magnetic head slider 21 is mounted on the tip of the magnetic head slider 21 via the suspension mechanism 10, and the magnetic head slider 2 is also provided.
1 is equipped with a rotatable rotary arm 22 for urging the movement of the magnetic disk D in a substantially radial direction, and a drive means 23 for urging the rotary motion of the rotary arm 22.

The above-mentioned suspension mechanism 10 is mainly
It is composed of a flat gimbal member 1 for holding the magnetic head slider 21, and a load beam 11 arranged between the gimbal member 1 and a rotating arm 22 of the magnetic disk device 20. Lead wires are provided along the load beam 11 to connect the magnetic head to a built-in circuit provided in the magnetic disk device 20. Therefore, the load beam 11 is provided with a groove for arranging a lead wire (not shown).

Further, as shown in FIG. 2, the gimbal member 1 includes a body portion 6 in which two arms 2 are projected on the same plane in a direction to be a rotation end, and a space between the two arms 2. A slider mounting portion 3 provided with a magnetic head slider 21 and a support portion that is connected to the tips of both arms 2 and that supports the tip side (rotating end side) of the slider mounting portion 3. 5 and 5. That is, the slider holding portion 3 is arranged such that one end thereof is supported by the supporting portion 5 and the end portion on the side of the free end is directed in the direction opposite to the protruding direction of the arm 2.

Reference numeral 6B is an engaging hole for engaging the tip of the load beam 11. Here, the gimbal member 1
Has a flat plate shape as a whole, and the main body section 6, each arm 2, the support section 5, and the slider mounting section 3 are all flat plate shapes. However, the support portion 5 is provided with a minute step, which allows the vertical swing when the slider mounting portion 3 is equipped with the magnetic head slider 21.

Further, the gimbal member 1 is provided with two rising portions 4 which are perpendicular to the flat surface of the gimbal member 1 at both ends of the supporting portion 5. Each of these rising portions 4 is connected to the support portion 5 along the protruding direction of each arm 2. The length thereof is set to be slightly longer than the side end portion of the support portion 5, and is partly approaching the tip end side of each arm 2.

Assuming that the length of the approaching portion is l and the total length of the arm 2 in the protruding direction is L, l = 0.
The length of each rising portion 4 is set so that 15 × L is satisfied.

The gimbal member 1 is entirely formed of a single metal plate. That is, a substantially rectangular metal plate having a wide portion formed at one end is used in advance,
A U-shaped slit is formed in the vicinity of one end portion where the wide portion of the metal plate is provided, an inner region of the U-shaped portion serves as a slider mounting portion 3, and both side ends of the slit serve as arms 2. Further, the height difference provided on the support portion 5 is formed by rolling or the like.

Furthermore, the rising portions 4 are formed by vertically bending the wide portions by bending. Then, a fixing hole 1C is formed on the other end side by drilling, whereby the entire gimbal member 1 is formed.

By forming the gimbal member 1 from a single metal plate as described above, the number of parts of the suspension mechanism 10 is reduced, and the work of assembling and joining a plurality of parts is omitted. It is designed to improve sex.

Next, the operation of the embodiment of the present invention will be described.

As shown in FIG. 1, a suspension mechanism 1 is provided at the turning end of a turning arm 22 of a magnetic disk device 20 equipped with a magnetic disk D, and a magnetic head is provided through the suspension mechanism 1. A magnetic head slider 21 is provided.

At this time, the gimbal member 1 of the suspension mechanism 10 moves the rotating arm 22 through the load beam 11.
The gimbal member 1 is disposed at the rotating end of the
The slider mounting portion 3 is equipped with the magnetic head slider 21.

When the recording information is read from or written to the magnetic disk D, the driving means 2 is used.
A rotating operation is urged by the rotating arm 22 from 3 and the magnetic head slider 21 is moved substantially perpendicularly to each track of the magnetic disk D via the suspension mechanism 10 in response to the operation. The magnetic head is positioned with respect to the arbitrary track above.

The two arrows shown in FIG. 1 respectively indicate the radial direction x and the tangential direction y of the rotating operation of the rotating arm 22, and the direction of the disk surface of the magnetic disk D rotating at a high speed is shown. Magnetic head slider 2 that floats and moves
Since 1 is held by the slider mounting portion 3 via the two arms 2 and the supporting portion 5, the elastic effect of each arm 2 causes a rotation direction (rolling direction) about the radial direction x and a tangential direction y. The holding force is allowed in the rotation direction (pitching direction) about the magnetic head slider 2
The followability of the magnetic head mounted in No. 1 is good.

Further, with respect to the vibration along the tangential direction y (yaw direction) that occurs during the positioning operation of the magnetic head, the respective rising portions 4 provided on both sides of the support portion 5 of the gimbal member 1 have their respective arms. Since it extends to the region of 15% on the tip side of 2, the rigidity in the yawing direction is increased, that is, the vibration is suppressed and the occurrence of off-track is prevented.

Here, according to a simulation performed on a gimbal member having a shape obtained by removing the two rising portions 4 from the gimbal member 1 shown in FIG. 2, 70% of the central portion of the arm (in the length direction in FIG. 2) The results show that the areas except for 15% of both ends) contribute to the rigidity in the rolling direction and the pitching direction.

Further, the result is obtained that the portion related to the rigidity in the yawing direction is from the support portion of the gimbal member to the tip side of the arm of 15%.

Therefore, as in the gimbal member 1 shown in the above embodiment, in the case of the structure in which the rising portions 4 are provided from the support portion 5 of the gimbal member 1 to the tip side of each arm 2 by 15%, It is possible to increase only the rigidity in the yawing direction without increasing the rigidity in the rolling direction and the pitching direction. That is,
This makes it possible to prevent the occurrence of off-track without impairing the followability of the magnetic head.

Further, in this embodiment, the rising portions 4 which are vertically raised are provided on both sides of the supporting portion 5 of the gimbal member 1 so that the width of the gimbal member 1 is prevented from widening. The contact between the lead wire extending from the magnetic head to the load beam 11 and the gimbal member 1 is prevented, and the maintainability of the entire apparatus is improved.

[0043]

FIG. 3 shows an embodiment of the present invention. The example shown here has the same shape and structure as the gimbal member of the suspension mechanism disclosed in the above-described embodiment. A load beam is shown by a chain double-dashed line in FIG.

Specific dimensions of this gimbal member are shown below.
That is, the plate thickness P of each part of the gimbal member is 30 [μ
m], the overall width W of the gimbal member is 1.6 [mm],
The width G of the arm only is 0.35 [mm], and the arm length M
Is 2 [mm], the side end length K of the gimbal member is 0.35 [mm], and the height H of the rising portion is 0.3 [m].
m], the length Q of the rising portion is 0.65 [mm] (K + M
(Calculated by × 0.15) and the material is SUS3
04 is used. In this gimbal member, only the rigidity in the yawing direction (without increasing the rigidity in the rolling direction and the pitching direction) is about 30.
% Can be increased.

[0045]

According to the first aspect of the present invention, the gimbal member is provided with the rising portions on both sides of the supporting portion of the gimbal member, which are somewhat longer than the supporting portion. It is possible to increase the rigidity in the yawing direction while suppressing the increase in the rigidity in the rolling direction and the pitching direction of the member.

Therefore, by equipping the magnetic disk device with the suspension mechanism of the present invention, off-track at the time of reading or writing information can be effectively prevented without impairing the followability of the magnetic head to the magnetic disk. be able to.

Further, in the present invention, since the rising portion is provided instead of the conventional wide portion, the occurrence of the disconnection accident of the lead wire of the magnetic head due to the contact with the wide portion like the conventional gimbal member. Therefore, it is possible to improve the reliability of the entire device. Further, since the width of the magnetic disk device is smaller than that of the conventional one, it does not hinder the work of disposing the lead wire of the magnetic head during the assembling work of the magnetic disk device, and the workability can be improved. Has become.

According to the second aspect of the present invention, the gimbal member has the same effects as the first aspect of the present invention, and the gimbal member is provided with a rising member individually up to 15% of the total length of each arm. Therefore, it is possible to increase the rigidity in the yawing direction while further suppressing the increase in the rigidity in the rolling direction and the pitching direction of the gimbal member.

Therefore, by equipping the magnetic disk device with the present invention, it is possible to effectively prevent off-track when reading or writing information without impairing the followability of the magnetic head to the magnetic disk. .

According to the third aspect of the present invention, the same effect as that of the second aspect of the invention is obtained, and since the gimbal member is formed of a single metal plate, the number of parts constituting the suspension mechanism is reduced. Further, since the work of assembling and joining the plural parts is omitted, it is possible to improve the productivity of the entire apparatus.

As described above, according to the present invention, it is possible to provide an excellent suspension mechanism which has never been obtained.

[Brief description of drawings]

FIG. 1 is a partially omitted schematic diagram showing a magnetic disk device equipped with the present invention.

FIG. 2 is a perspective view showing the gimbal member disclosed in FIG.

FIG. 3 is a perspective view showing an embodiment.

FIG. 4 is a partially omitted schematic view showing a magnetic disk device equipped with a conventional suspension mechanism.

5 is a perspective view of the conventional gimbal member disclosed in FIG. 4. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gimbal member 2 Arm 3 Slider mounting part 4 Start-up part 5 Support part 6 Main body part 10 Suspension mechanism 21 Magnetic head slider D Magnetic disk

Claims (3)

[Claims] 1. A suspension mechanism including a flat plate-shaped gimbal member for holding a magnetic head slider, wherein the gimbal member includes a main body portion having two arms projecting from the same plane, and the two arm portions. A slider mounting portion which is provided between the slider mounting portions and is equipped with the magnetic head slider; and a support portion which is connected to both ends of the two arms and supports the tip end side of the slider mounting portion. Two rising portions that are substantially perpendicular to the flat surface of the gimbal member are provided on both sides of the supporting portion, and the length of each of these rising portions in the direction along the arm is slightly larger than that of the supporting portion. A suspension mechanism characterized by being set long. 2. The suspension mechanism according to claim 1, wherein the length of each rising portion is set to be 15% of the entire length of the arm from the supporting portion. 3. The suspension mechanism according to claim 2, wherein the gimbal member is formed of a single metal plate.