JPS6286590A - Head support mechanism - Google Patents

Abstract

PURPOSE:To restrict an oscillation and to prevent the contact and damage of a head and a recording medium by providing a resilient member at least the resilient part of a support member for resiliently supporting a floating slider on a recording medium surface. CONSTITUTION:On both side edge parts of a cantilever type resilient support member 7, a leading part 7a by a bending work for reinforcing is formed, a floating slider 3 side is made a load arm 9, a head positioning mechanism arm part 5 side is made to a load spring part (resilient member) 11, and the floating slider 3 applies a fixed load force on a magnetic disk. From the load spring part 11 between arm parts 5 on upper and lower both surfaces of the support member 7 and a floating slider 1 to the approximate central part of the load arm part 9, plate like resilient members 13 and 15 composed of rubber or the like are bonded. According to such a constitution, a correct head position to a recording medium surface is maintained and the damage of the head and the recording medium due to the contact thereof can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a head support mechanism for a rotating disk device such as a magnetic disk or an optical disk.

[Technical Background of the Invention 1] Generally, in a rotating disk device in which a recording medium rotates at high speed, the head and head support system that control the recording and reproduction of information are operated by the undulations of the recording medium and the vibrations from the drive system of the recording medium. Vibration itself is induced by disturbances such as vibration, vibration (flutter) caused by the gas flow accompanying the rotation of the recording medium, or vibration from the head positioning mechanism. In order to stably record and reproduce information, the head support mechanism must sufficiently suppress vibrations caused by these disturbances and support the head at an accurate gap position and accurate track position on the recording medium surface. required.

In order to meet this demand, a head support mechanism as shown in FIG. 11 has conventionally been adopted. This head support mechanism is used in a magnetic disk device, and supports a floating slider 103 on which a head is mounted and floats above a magnetic disk 101 at one end via a gimbal spring section 105, and at the other end is an arm section of a head positioning mechanism. (fixed part) attached to the magnetic disk 107 and the floating slider 103
A cantilever-like elastic support member 1 consisting of a load arm portion 109a and a load spring portion 109b that apply a constant load force to the top.
It is equipped with 09. By interposing a vibration isolating member such as a vibration isolating rubber 111 between the support member 109 and the arm portion 107, a head positioning mechanism and a drive portion for the magnetic disk 101 are transmitted via the arm portion 107. This is intended to achieve stable head support by blocking vibrations from other sources.

[Problems in the Background Art] However, in such a conventional head support mechanism, it is difficult to suppress vibrations transmitted from the magnetic disk 101 via the floating slider 103 or vibrations (flutter) caused by rotating airflow. For example, in the load arm part 109a of the head support mechanism and the load spring part 109b, the support mechanism fixing part (arm part 107) of the head positioning mechanism where the load force point 113 of the floating slider 103 and the vibration isolating rubber 111 are installed. If resonance is induced in the eigencapture mode where the node is the floating slider 1,
The load force point 113 seen from the head 03 is equivalently a very rigid support point, and the vibration of the magnetic disk 101 directly appears as a fluctuation in the gap between the head and the magnetic disk 101. As a result, the recording and reproducing functions of the head are impaired, and this leads to contact between the magnetic disk 101 and the head, increasing the risk of mutual damage (head crash).

FIG. 12 is a simulation showing the deformation mode due to bending vibration of the head support mechanism as described above. This simulation shows that the upper left side in the figure is the load arm part 109b of the arm part 107 side of the head positioning mechanism, and the lower right side is the floating slider 103, and the head support mechanism is drawn by a line parallel to the longitudinal direction. This is a simulation using FEM (numerical analysis using the finite element method), which shows that the deformation is large when the parallel lines are disrupted by finely divided parts due to vibration.

According to this, it can be seen that deformation is observed near the load spring portion 109b (portion A) on the upper left side in the figure.

[Purpose of the Invention] This invention was made by focusing on the problems of the conventional art, such as surface runout of the recording medium, vibrations caused by the gas flow accompanying the rotation of the recording medium, vibrations from the head positioning mechanism, etc. A highly reliable head support mechanism that suppresses resonance of the head support mechanism induced by external disturbances, maintains accurate head position relative to the recording medium surface, and prevents damage to both the head and recording medium due to contact. For the purpose of providing.

[Structure of the Invention] In order to achieve this object, the present invention provides a floating slider having a head that floats with a predetermined gap with respect to a recording medium and controls recording and reproducing information, and a floating slider having one end on the side of the floating slider and the other end on the side of the floating slider. are respectively fixed to fixed parts on the head positioning mechanism side, and a support member elastically supporting the floating slider side on the recording medium surface, the support member between the fixed part and the floating slider side; The structure is such that an elastic member is provided at least at an elastic portion of the member.

[Example] Hereinafter, the present invention will be described in detail based on FIGS. 1 to 10.

1 to 3 show a first embodiment of the invention. In this embodiment, substantially similar to the conventional example, a floating slider 1 equipped with a head and floating above a magnetic disk (not shown) is supported at one end via a cymbal spring 3, and the other end is an arm of the head positioning mechanism. A cantilever-shaped elastic support member (hereinafter simply referred to as a support member) 7 is provided which is attached to the (fixed part) 5. This support member 7 has rising parts 7a formed by bending on both side edges for reinforcement, and the floating slider 3 side serves as a load arm part, and the arm part 5 side of the head positioning mechanism serves as a load spring part ( Elastic part) 1
1, and a constant load force is applied to the floating slider 3 on a magnetic disk (not shown). Then, plate-shaped elastic members 13 and 15 made of rubber or the like are joined from the load spring section 11 between the arm section 5 and the floating slider 1 on both upper and lower surfaces of the support member 7 to the approximate center of the load arm section 9. .

With this configuration, vibrations from the head positioning mechanism, magnetic disk drive unit, etc. transmitted via the arm portion 5 of the head positioning mechanism are blocked by the elastic member 13.15, and the floating slider 1 is removed from the magnetic disk. Vibrations transmitted through or due to the rotating air flow cause the load force point of the floating slider 1 and the fixing part of the head positioning mechanism arm part 5 to the support member 7 to become nodes in the load arm part 9 and the load spring part 11. When resonance is induced in the natural vibration mode, the elastic members 13 and 15 absorb this and suppress the resonance. In particular, this configuration is effective in suppressing bending vibration mainly caused by the load spring portion 11, which is the lowest order (-order) natural vibration mode of the head support mechanism, which was deformed in the conventional example.

FIG. 3 shows that in the head support mechanism having the above configuration, the arm part 5, which is the part that fixes the support member 7 to the head positioning mechanism, is forcibly vibrated, and the variation in the gap between the floating slider 1 and the magnetic disk at that time is detected. These are the results of measuring the vibration transmission characteristics of the head support mechanism. In this figure, the horizontal axis represents the frequency of forced excitation, and the vertical axis represents the ratio of the gap variation between the floating slider 1 and the magnetic disk to the excitation amplitude, and the solid line represents the frequency according to this embodiment. The one-dot chain line shows the conventional one in which the elastic members 13 and 15 are not joined.

According to this, the primary resonance point of the support mechanism is the same as the conventional 1.
Although it has decreased from 8 Kf (z to 1.25 Kl-12 in this embodiment), the level of vibration transmission characteristics that affect the gap variation between the floating slider 1 and the magnetic disk is about 40 ( It can be seen that fB (1/100) is also suppressed, and in addition, the second-order and higher resonance points almost disappear.Also, in the high band of 7 to 9 KH2, the support mechanism of this example reduces the The level of the transfer characteristic has been reduced by more than /10), indicating that the vibration damping effect of the head support mechanism according to this embodiment is extremely large.

4 and 5 show a second embodiment. In this embodiment, the elastic members 13 , 15 are joined such that they are thicker in the load spring section 11 and thinner in the load arm section 9 . In this way, the elastic member 1 in the load spring section 11
By increasing the thickness of 3.15, -order resonance is further suppressed. In general, it is known that by sufficiently suppressing the −-order resonance, higher-order vibration modes can also be essentially suppressed, and that the higher-order natural vibration modes are more likely to occur at the load arm than the first-order natural vibration modes. The deformation (distortion) at 9 is small.

Therefore, since almost no first-order resonance occurs in the load arm portion 9 and only a slight high-order resonance occurs, the thickness of the elastic members 13 and 15 in this portion is made equal to that of the load spring portion 11. It can be made much thinner.

At the same time, the increase in mass of the head support mechanism due to the joining of the elastic members 13 and 15 can be concentrated in a portion relatively close to the arm portion 5, which is the fixed portion of the support mechanism, so that the natural frequency There is also the advantage that the decrease in can be suppressed slightly. Note that in FIG. 4, reference numeral 17 indicates a magnetic disk.

FIG. 6 shows a third embodiment. In this embodiment, the elastic members 13 and 15 are made into thin plate shapes, and the load spring portion 11 is mainly
These elastic members 13 and 15 are laminated and bonded in layers. As a result, in addition to the damping effect of the elastic member 13.15 itself, it is also possible to have a damping effect due to solid friction between the surfaces of the elastic members 13.15 in each layer, further improving the damping effect. can be achieved.

FIGS. 7 and 8 show a fourth embodiment. In this embodiment, like the embodiment shown in FIG. 6, fine irregularities 19 that fit into each other are formed on the joint surfaces of the elastic members 13 and 15 stacked in layers. The damping effect due to the solid friction between the surfaces of the elastic members 13 and 15 shown in 13 and 15 is further enhanced.

FIG. 9 shows a fifth embodiment. In this embodiment, a wavy bent portion 11a is formed on the load spring portion 11, and
In accordance with this load spring part 11, the elastic member 13.15 is also formed with a wavy bent part 138°15a, which allows the spring constant of the load spring part 11 to be adjusted and the fixing surface of the head support mechanism ( This reduces changes in the load applied to the floating slider 1 due to setting errors between the arm portion 5) and the magnetic disk, and increases the torsional rigidity of the load spring portion 11.

FIG. 10 shows a sixth embodiment. This is because a drawn portion 11b is formed on the upper surface side of the load spring portion 11 in the figure so that a groove is formed along the width direction of the load burr portion 11, and the elastic members 13 and 15 are also formed with this drawn portion 11b. In addition, a concave portion (not shown) and a convex portion 15, respectively.
b is provided. The operations and effects resulting from this are similar to those of the embodiment shown in FIG.

In the second to sixth embodiments, the same components as in the first embodiment are given the same reference numerals, and the parts not explained are the same as in the first embodiment.

Further, although the present invention has been described in each of the above embodiments as a magnetic disk device as a rotating disk device, the present invention is not limited to this and can be applied to optical disk devices and the like. Further, the elastic member may not be provided on both sides of the load spring section but only on one side, and the conventional vibration isolating rubber shown in FIG. 1 may be extended to the load spring section or the load arm section.

[Effects of the Invention] As described above, according to the present invention, since the elastic member is provided at least in the elastic portion of the support member that elastically supports the floating slider on the surface of the recording medium, the mechanism is simple, and the increase in mass of the support mechanism is achieved. without increasing the resonant frequency.
Not only vibrations from the fixed side of the head support mechanism,
Since vibrations induced from the floating slider side can also be suppressed, contact and damage between the head and the recording medium can be prevented, and the floating slider can be stably supported on the surface of the recording medium.

[Brief explanation of drawings]

1 to 3 relate to a first embodiment of the present invention, in which FIG. 1 is a side view of the head support mechanism with the head side omitted, FIG. 2 is a perspective view of the same as seen from the back, and FIG. 3 is an explanatory diagram showing the transmission characteristics of vibrations transmitted to the support mechanism together with those of the conventional one, FIG. 4 is a side view of the head support mechanism of the second embodiment, and FIG. 5 is a perspective view seen from the rear side of FIG. 4. , FIGS. 6 and 7 are side views corresponding to FIG. 1 of the third and fourth embodiments, respectively, FIG. 8 is a perspective view of the main part of FIG. 7, and FIGS. 9 and 10 are side views corresponding to FIG. FIG. 11 is a side view of a conventional head support mechanism, and FIG.
The figure is a simulation diagram showing a deformation mode due to bending vibration of a conventional head support mechanism. 5... Arm part (fixed part) of the head positioning mechanism 7.
... Support member 11 ... Load spring part (elastic part) 13
．． 15...Elastic member Fig. 1 Fig. 8 Fig. 9

Claims (1)

[Claims] Floating with a predetermined gap to the recording medium to record and record information.
a floating slider equipped with a head that controls reproduction; and a support member having one end fixed to the floating slider side and the other end fixed to a fixed part of the head positioning mechanism side, and elastically supporting the floating slider side on the recording medium surface. A head support mechanism comprising: an elastic member provided at least at an elastic portion of the support member between the fixed portion and the floating slider side.