JPS61104315A - Magnetic head assembly - Google Patents

Abstract

PURPOSE:To reduce the man-hour for assembling by using a flexible printed circuit (FPC) and allowing it to act for a load spring and a signal line. CONSTITUTION:A core slider having a core A provided with a winding is attached to the front end side of an FPC12, and the rear end side of the FPC12 is attached to an arm supporting it through a spacer 4. With respect to this FPC12, a conductor layer 13 having a spring property as the intermediate layer is formed to a prescribed pattern, and layers (organic materials such as plastics) 14 and 15 on upper and lower sides of this layer 13 are formed to prescribed shapes. A stainless steel having 50mum thickness is used as the conductor layer 13 to attain a spring pressure. In case of assembling, the core slider 6 and a gimbals 7, the gimbals 7 and the FCP12, and the FCP12 and the spacer 4 are fixed by an adhesive, and a read/write lamp 17 is soldered to the FCP conductor layer 13, and the conductor layer 13 and a lead wire 9 of the winding are fixed in a front end part 16 of the FCP12 by soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head assembly for recording and reproducing information on a disk-shaped recording medium.

For example, a magnetic disk device using a magnetic head has a second
As shown in the figure, a magnetic disk 1 rotates by a driving bag W (not shown), a head arm 3 attached to a bed driving positioner 2, and a spacer 4 attached to the head arm 3.
A gimbal 7 holding a core slider 6 is attached to a load spring 5 attached via a gimbal 7. Note that the core slider 6 has a winding portion (not shown) wound around the core. The positioner 2 in the figure shows a swing arm type, and 8 is a base.

The core slider 6 floats due to the floating blade generated by the magnetic disk rotating 10 times, and reading/fortune-telling is performed stably on the magnetic disk 1 due to the balance with the pressure of the load spring 5, and the read/write signal is transmitted through the signal line. (not shown) to an amplifier circuit (not shown) mounted on the head arm 3.

In assembling the magnetic disk drive, the core slider 6, gimbal 7, load spring 5, and signal line are assembled into one magnetic head assembly, and the spacer 4 is fixed to it and attached to the head arm 3.

As mentioned above, magnetic head assemblies are complicated and have many component parts, which requires a large number of assembly steps.Therefore, there is a need for a magnetic head assembly that can reduce the number of component parts and simplify and shorten assembly time. There is.

[Conventional technology]

FIG. 3 is a side view showing a conventional magnetic head assembly. In the figure, a core slider 6 having a core A with a wire wound thereon.
is held by a flexible gimbal 7, the gimbal 7 is attached to a load spring 5, and a spacer 4 is attached to the load spring 5. Further, a signal line (lead line 9) for transmitting information is passed through a tube 10 and placed on the load spring 5.

The magnetic head assembly is attached to a head arm 3 attached to a head driving body sinker 2, and information is recorded and reproduced while floating above a rotating disc-shaped medium (magnetic disk 1).

[Problem that the invention seeks to solve]

In assembling the conventional magnetic head assembly shown in FIG.
The core slider 6 and gimbal 7 are fixed with adhesive, the gimbal 7 and load spring 5 are fixed by welding, and the load spring 5 and spacer 4 are fixed by welding.
The fixing work involves welding and is complicated.

Further, the tube IO through which the lead wire 9 is passed is fixed by a tube holding portion 11 which is a bent hook on the load spring 5. The inner diameter of the tube 10 is small, 0.3 ml, and the four lead wires are passed through it, but this work is extremely difficult.Furthermore, since the tube 10 is thin, it is difficult to bend the hook.

As mentioned above, the magnetic head assembly has the problems of requiring a large number of assembly steps due to the large number of complicated components, requiring skill in assembly, and being prone to defects.

[Means for solving problems]

The above problem is that the magnetic head assembly has an internal conductive layer with spring properties instead of the load spring and signal line.
This problem is solved by the magnetic head assembly of the present invention, which is composed of a member sandwiched between upper and lower insulating layers.

[Effect]

In other words, there is something commonly called FPC (flexible printed circuit), and the middle layer of that FPC (
The metal layer) is formed in a predetermined pattern, and both side layers (organic material) are formed in a predetermined pattern.

A core slider having a core wound with a wire is attached to the tip side of the FPC, and a lead wire of the winding is arranged. The FP
The rear end of the CO was attached to an arm that supports the FPC.

The metal layer of the FPC functions in the same way as a load spring, balances the floating blade of the magnetic head, and allows the FPC to float above the rotating disc-shaped medium, and information can be recorded and reproduced in the floating state.

〔Example〕

Hereinafter, the gist of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a side view illustrating an embodiment of the present invention. Note that the same reference numerals throughout the figures indicate the same objects.

The magnetic head assembly shown in FIG. 1 has a core slider 6 having a core A with a winding attached to the tip side of what is commonly called an FPC 12, and a lead wire 9 of the winding wire is arranged, and the rear end side of the FPC 12 is It is attached to an arm 3 that supports it via a spacer 4.

Above FPC, (Flexible Printed Circuit)
12 is a conductor layer 13 having spring properties (for example, stainless steel material, phosphor bronze material, etc.) as an intermediate layer formed in a predetermined pattern, and the upper and lower both sides of the conductor layer 13 (made of organic material such as plastic).
14.15 into a predetermined shape. Note that the conductor layer 13 has the same thickness as the conventional load spring 5, 50μI.
It uses stainless steel and produces the same spring pressure as load spring 5.

In addition, during assembly, the core slider 6 and the gimbal 7, the gimbal 7 and the FPC 12, the FPC 12 and the spacer 4 are fixed with adhesive, and the read/write amplifier 17 is fixed to the FPC conductor layer 13.
Further, the conductor layer 13 and the lead wire 9 of the winding are fixed by soldering using the tip part 6 of the FPC 12.

Fixing during assembly is easy with adhesive and soldering as described above, and it is convenient that the lead wires can be soldered at the same time as the read/write amplifier 17 attached to the FPC 12.

As described above, since the conductor layer 13 of the FPC 12 is used instead of the lead wire, the lead wire is unnecessary and there is no need to pass the conventional chi nib 10 with a narrow inner diameter, making the work simple and reducing the number of assembly steps.

In addition, the chinib lO and the tube holding part 11 are not required, and since the read/write amplifier 17 is mounted on the FPC 12 made slightly longer, the conventional printed board on which the read/write amplifier 17 is mounted is not required. Therefore, the number of components can be reduced, simplifying assembly,
It can save time and reduce costs.

Furthermore, since the conductor layer 13 of the FPC 12 is a spring, it is sandwiched between the upper and lower parts of plastic, which is fi material.
Since minute vibrations of the conductor layer 13, which is a spring, can be absorbed, stable flying of the magnetic head can be expected.

〔Effect of the invention〕

As explained above, according to the present invention, by using FPC to replace the functions of load springs and signal lines, the number of components is reduced, and assembly is simplified and time is shortened.
It is possible to further reduce the price. Furthermore, since the conductor layer of the FPC is used as a spring and its vibration can be absorbed by the upper and lower plastic layers, it is expected that the flying of the magnetic head will be stabilized.

[Brief explanation of drawings]

FIG. 1 is a side view illustrating an embodiment of the present invention, FIG. 2 is a side view illustrating a magnetic disk device, and FIG. 3 is a side view illustrating a conventional magnetic head assembly. In the figure, 3 is a helad arm, 4 is a spacer, 6 is a core slider, 9 is a lead wire, and 12 is an FPC. 13 is a conductor layer, 14 and 15 are upper and lower layers, 16 is the tip of the FPC 12, and 17 is a read/write amplifier.

Claims (1)

[Claims] In a magnetic head assembly that has a gimbal/load spring for stably floating the magnetic head and a signal line for recording/reproducing information, an internal gimbal/load spring is used instead of the load spring and the signal line. 1. A magnetic head assembly comprising a member having a conductive layer having spring properties and sandwiched between upper and lower insulating layers.