JPH06176517A - Core slider supporting mechanism - Google Patents

Abstract

PURPOSE:To shorten the distance against the surface of a magnetic disk by fitting a tip part of a suspension to a bottom part of a groove provided on a core slider and absorbing the thickness of the suspension into the thickness of the core slider. CONSTITUTION:The tip part of the suspension 12 is fitted to the bottom part 14 of the groove 13 formed on a floating surface 11a of the core slider 11, so that the thickness of the suspension 12 is absorbed into the thickness of the core slider 11. By this method, the distance to the surface of the magnetic disk can be shortened. Then, the bottom 14 of the groove of the core slider 11 is positioned in the vicinity of a mass center of the core slider 11, so that the core slider 11 can stably be supported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support mechanism for a core slider, which is provided at the tip of a suspension, floats above a rotating magnetic disk with a minute interval, and reads / writes data from / to the magnetic disk. Regarding

In recent years, magnetic recording devices have tended to have higher densities, larger capacities, and smaller sizes. In particular, with regard to miniaturization, spindle motors and printed boards are being miniaturized, and mounting of magnetic disks and core sliders is being made thinner.

[0003]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings.
FIG. 7 is a plan view of an example of a conventional core slider support mechanism, and FIG. 8 is a side view of FIG.

In these figures, 1 is a magnetic disk 2
The carriage is driven in the direction crossing the track. The base end of the spring arm 4 is attached to the tip of the carriage 1. The base end of the gimbal spring 5 is attached to the tip end of the spring arm 4, and the tip end of the gimbal spring 5 is a magnetic conversion unit (for example, a thin film head) that reads / writes data from / to the magnetic disk 2. It is attached to the back surface of the core slider 6 on which 6a is formed. Rails 6b are formed on both sides of the air bearing surface of the core slider 6, and the tips of the rails 6b are formed.
A taper portion 6c is formed (in the vicinity of the end surface of the core slider 6 facing the air flow generated by the rotation of the magnetic disk).

A spring portion 4a is formed in the vicinity of the base end portion of the spring arm 4, and a bent portion 6b is formed on both side portions other than the spring portion 4a so as to ensure rigidity. Has been done. A suspension 9 is formed by the spring arm 4 and the gimbal spring 5.

Reference numeral 7 is an electromagnetic conversion portion 6a of the core slider 6.
Is a lead wire for transmitting and receiving a signal to and from the electromagnetic conversion portion 6a, and 8 is a tube for protecting the lead wire 7.
Next, the operation of the above configuration will be described. When the magnetic disk device is off, the biasing force of the spring arm 4 causes
The core slider 6 is pressed against the magnetic disk 2.

When the magnetic disk device is turned on, the magnetic disk 2 is rotationally driven at high speed by a spindle motor (not shown) (for example, 3600 rpm). Magnetic disk 2
Due to the air flow generated by the rotation of the core slider 6, the core slider 6 floats above the magnetic disk 2 with a minute gap against the biasing force of the spring arm 4.

When the carriage 1 is driven in the direction traversing the track of the magnetic disk 2 and the core slider 6 moves on the target track, the magnetic disk 2 is moved to the magnetic disk 2 via the electromagnetic conversion section 6a of the core slider 6. Data is read / written.

The gimbal spring 5 has an action (damper action) of softening the vibration of the core slider 6 generated by the turbulent flow of air.

[0010]

However, the support mechanism of the core slider having the above structure has the following problems.

The face-to-face distance between magnetic disks (the distance between magnetic disks) is determined by the sum L of the thickness of the core slider 6 and the thickness of the suspension 9 in FIG.

That is, since the upper and lower core sliders 6 are disposed between the two magnetic disks, at least:
The face-to-face distance of the magnetic disk must be 2L or more. The tip of the gimbal spring 5 is attached to the back surface of the core slider 6. Therefore, since the support portion of the core slider 6 is located far away from the mass center of the core slider 6, the vibration generated in the device is amplified, the core slider 6 vibrates greatly, and the stability is poor.

The present invention has been made in view of the above problems, and an object thereof is to provide a core slider support mechanism capable of shortening the surface distance of a magnetic disk and stably supporting a core slider.

[0014]

FIG. 1 is a principle view of the invention described in claim 1. In the figure, reference numeral 11 denotes a core slider which is provided at the tip of the suspension 12 and which floats above the rotating magnetic disk with a minute interval and reads / writes data from / to the magnetic disk. Grooves 13 are formed on the air bearing surface 11a of the core slider 11,
The tip of the suspension 12 is attached to the bottom 14 of the groove 13.

According to a second aspect of the present invention, the bottom of the groove in the first aspect is near the mass center of the core slider.

[0016]

In the core slider support mechanism according to the present invention, the tip of the suspension 12 has the core slider 1
Since it is attached to the bottom portion 14 of the groove 13 formed on the air bearing surface 11a of No. 1, the thickness of the suspension 12 is absorbed within the thickness of the core slider 11, and the inter-plane distance of the magnetic disk can be shortened.

Further, in the core slider supporting mechanism according to the second aspect of the invention, since the bottom portion 14 of the groove 13 of the core slider 11 is near the mass center of the core slider 11,
The core slider 11 is stably supported.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. First, the overall configuration of a magnetic disk device using the core slider support mechanism of this embodiment will be described with reference to FIGS. FIG. 5 is a partial plan view of a plane, and FIG.
It is an AA sectional view.

In these figures, 21 is an enclosure. The enclosure 21 is composed of a base portion 22 whose top and corners are open, and a lid 23 which covers the top. A spindle hub 24, which is rotationally driven (for example, 3600 rpm) by an inner hub motor (not shown), is provided on the base portion 22. A plurality of magnetic disks 26 (six in this embodiment) are attached to the outer cylindrical surface of the spindle hub 24 via a spacer 25.

Further, a shaft 30 is provided on the base portion 22.
Is erected. The shaft 30 has a bearing 31
The carriage 32 is rotatably provided via the.
A head arm 33 that extends in the recording surface direction of each magnetic disk 26 and that rotates in a direction traversing the track of the magnetic disk 26 is formed at one rotation end of the carriage 32.

A magnetic circuit 34 is provided at the corner of the enclosure 21. The magnetic circuit 34 covers the corners of the base portion 22 and the lid 23 and forms an outer shell of the magnetic disk device, an inner yoke 36 connected to the outer yoke 35, and the outer yoke 35. And a magnet 37 provided on the surface facing the inner yoke 36, and a magnetic gap 38 is formed between the outer yoke 35 and the inner yoke 36.

A coil 39 disposed in the magnetic gap 38 of the magnetic circuit 34 is provided at the other rotating end of the carriage 32.
Is installed. A core slider 41 for reading / writing data from / to the recording surface of the magnetic disk 26 via a core slider support mechanism 40 is provided at the tip of a head arm 33 formed at one rotating end of the carriage 32.
Is provided.

2 which is a plan view showing the core slider support mechanism of the present embodiment, and FIG. 3 which is a front view in FIG.
The core slider support mechanism 40 will be described with reference to FIG. 4 which is a perspective view of the core slider in FIG. In these figures, 50 is the end of the head arm 33 which is caulked,
It is a spacer that can be attached with screws. Spacer 5
At 0, a base end of a spring arm 51 for urging the core slider 41 toward the recording surface of the magnetic disk 26 is attached by a technique such as spot welding. A spring portion 51a is formed near the base end portion of the spring arm 51, and both side portions other than the spring portion 51a are bent portions 51b bent in a direction orthogonal to the recording surface of the magnetic disk 26 to ensure rigidity. Are formed.

The base end of a gimbal spring 52 is attached to the tip of the spring arm 51.
A core slider 41 is attached to the tip of the. Next, the core slider 41 will be described with reference to FIG. Two thin film magnetic heads 55 are formed on one end surface of the core slider 41 as an electromagnetic conversion portion, but only one of them is actually used. In the thin film magnetic head 55, 56 is a magnetic gap, 57 is a coil,
Reference numeral 58 is a magnetic circuit, and 62 is a pad of the coil 57.

Further, the magnetic disk 26 of the core slider 41
Rails 59 projecting toward the recording surface of the magnetic disk 26 are formed on both sides of the air bearing surface. A groove 60 acting as a negative pressure generating portion is formed between the rails 59, and a taper portion 61 is formed on the other end surface side.

The bottom portion 70 of the groove 60 of this embodiment is located in the vicinity of the mass center (center of gravity) of the core slider 41, and the tip portion of the gimbal spring 52 is attached to this bottom portion 70 by means such as bonding.

Further, in FIG. 3, 63 is the core slider 4
A lead wire connected to the pad 62 of No. 1 for transmitting and receiving signals to and from the thin film magnetic head 55, and a tube 64 for protecting the lead wire 63.

Next, the operation of the above configuration will be described. When the magnetic disk device is off, the core slider 41 is pressed against the magnetic disk 26 by the urging force of the spring arm 51.

When the magnetic disk device is turned on, the magnetic disk 26 is rotationally driven at high speed by an inner hub motor (not shown) (for example, 3600 rpm). A negative pressure is generated in the groove 60 of the core slider 41 due to the air flow generated by the rotation of the magnetic disk 26, and the core slider 41 floats above the magnetic disk 26 with a minute gap against the biasing force of the spring arm 51. To do.

The control unit (not shown) is a magnetic circuit 34.
When an electric current is applied to the coil 39, a thrust force for rotating the carriage 32 is generated in the coil 39, and the head arm 33 is rotated.
Rotates across the tracks on the magnetic disk 26,
The core slider 41 moves onto the target track. still,
The gimbal spring 52 has a damper action and softly supports the core slider 41 with respect to the spring arm 51.

When writing data to the magnetic disk 26, the thin film magnetic head 55 of the core slider 41 is used.
A write signal corresponding to the write information is passed through the coil 57, and the write signal is converted into a magnetic flux by the magnetic circuit 58, and data is written on the magnetic disk 26 via the magnetic gap 56.

When data is read from the magnetic disk 26, a current is generated in the coil by the residual magnetic flux corresponding to the data recorded on the magnetic disk 26 via the magnetic gap 56 of the core slider 41. The current is used as the read signal.

According to the above construction, the tip end portion of the gimbal spring 52 has the groove 60 formed on the air bearing surface of the core slider 41.
Attached to the bottom portion 70 of the core slider 41.
Gimbal spring 52, which is a suspension, within the thickness of
The thickness of the spring arm 51 is absorbed, and as shown in FIG. 3, the sum L'of the thickness of the core slider and the thickness of the suspension, which determines the inter-plane distance of the magnetic disk, can be made much shorter than before.

Further, the bottom portion 7 of the groove 60 of the core slider 41 is
Since 0 is near the mass center of the core slider 41, the core slider 41 is stably supported.

[0035]

As described above, according to the first aspect of the invention, the inter-surface distance of the magnetic disk can be shortened by attaching the tip of the suspension to the groove formed on the air bearing surface of the core slider. .

According to the second aspect of the invention, since the bottom of the groove is located near the mass center of the core slider,
The core slider can be stably supported.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a plan view illustrating an embodiment of the present invention.

FIG. 3 is a front view of FIG.

FIG. 4 is a perspective view of the core slider in FIG.

5 is a plan partial cross-sectional view of a magnetic disk device having the core slider support mechanism shown in FIG.

6 is a sectional view taken along line AA in FIG.

FIG. 7 is a plan view of an example of a conventional core slider support mechanism.

FIG. 8 is a side view of FIG.

[Explanation of symbols]

 11 core slider 11a air bearing surface 12 suspension 13 groove 14 bottom portion

Claims (2)

[Claims] 1. A support mechanism for a core slider, which is provided at the tip of a suspension (12), floats above a rotating magnetic disk with a minute interval, and reads / writes data from / to the magnetic disk. Grooves (1) on the air bearing surface (11a) of the core slider (11)
3) is formed, and the suspension (12) is formed on the bottom (14) of the groove (13).
A core slider support mechanism, characterized in that the tip of the is attached. 2. The core slider support mechanism according to claim 1, wherein a bottom portion of the groove is in the vicinity of a mass center of the core slider.