JPS63193319A - Magnetic head - Google Patents

Abstract

PURPOSE:To reduce cost by constituting a magnetic head by directly sticking a core slider to a printed circuit board and connecting coil terminals of its conductive pattern. CONSTITUTION:A core slider 10 in which a head core 12 is incorporated is directly stuck to a printed circuit board 18 on which a conductive pattern 20 for relay of coil terminals is formed, and terminals of coils 22 and 24 wound around the leg part of the head core 12 are connected to the conductive pattern 20 so that they can be mounted on the front end part of a carriage arm as they are. By this constitution, a common module is used in side 0 and side 1 of a magnetic head and coil terminals are arranged and held on the printed circuit board. Thus, the cost of materials and the man-hour for assembling are reduced or the cost of management is reduced by the common use of members.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a digital magnetic head used in a magnetic disk device, and more specifically, a core slider is directly mounted on a printed wiring board, and a coil terminal is attached to the printed wiring board. The present invention relates to a magnetic head that is modularized by connecting it to a conductive pattern provided on the magnetic head.

[Prior Art] In flexible magnetic disk drive devices, a core slider having a structure in which, for example, a tunnel erase type head core is sandwiched between nonmagnetic outriggers from both sides is often used. Such a core slider is usually positioned and bonded onto a gimbal plate made of a thin metal plate as a reference.

Coils for reading/writing and erasing are mounted on the legs of the head core, and the back core is attached. A printed wiring board on which conductive patterns for relaying coil terminals are formed in advance is adhered to the ends of the gimbal plate, and coil terminals are soldered to each conductive pattern to assemble the magnetic head.

[Problem to be solved by the invention J] In the case of the currently mainstream double-sided recording system, in order to realize a head posture that is even more difficult to off-track, for example, side 0 is supported with a double pivot, and side 1 is supported with a single pivot. The support structure has been changed by making it a support.
Along with this, the shape of the gimbal plate is often different between side 0 and side 1, which results in diversification of the configuration of the magnetic head to be assembled, which has the drawback of requiring a large amount of material costs and assembly man-hours.

Additionally, the gimbal plate to which the core slider is attached is made of metal and has a good conductor, so placing the end of a thin coil wire along it will prevent a short circuit or grounding in the event that the coating is peeled off or damaged. There are problems with continuity etc.
Assembly work such as routing and holding the wire rods was cumbersome, and there were also problems in terms of reliability.

The purpose of the present invention is to eliminate the drawbacks of the prior art as described above, simplify the structure, and make side O and side L common.
It is an object of the present invention to provide a magnetic head having an improved structure, which can reduce material costs and assembly man-hours, and also prevent the drawn-out part of a coil terminal from coming into contact with a metal part, thereby increasing reliability.

[Means for Solving the Problems] The present invention, which can achieve the above objects, directly fixes a core slider incorporating a head core to a printed wiring board on which a conductive pattern for relaying coil terminals is formed. , is a magnetic head configured such that the end of a coil wound around the leg of the head core is connected to the conductive pattern, and can be mounted as is on the tip of a carriage arm.

Here, as the printed wiring board, in addition to a glass-based epoxy resin board, a ceramic board or the like may be used.The mounting of the magnetic head on the carriage arm is carried out in advance by attaching a predetermined shape to the carriage arm according to the required specifications. The gimbal section may be integrally formed with a mold or the like and attached thereto, or it may be mounted directly on the carriage arm without intervening the gimbal section.

[Function] If the core slider is not fixed to the gimbal plate but fixed to the printed wiring board and the coil terminal is connected to the conductive pattern, the magnetic head can be integrated into a common module between side O and side 1. can. For this reason, the assembly of the magnetic head is greatly simplified. In addition, the coil terminal is arranged and held along the printed wiring board,
Since the terminal can be soldered as is, even if the wire coating is damaged, there is no risk of short circuiting or conduction with the ground, and reliability is improved.

Since the magnetic head assembled in this manner can be mounted as is on the tip of the carriage arm, it is possible to reduce material costs and assembly man-hours, or to reduce management costs by standardizing parts.

[Example] Fig. 1 shows an embodiment of the magnetic head according to the present invention, in which Fig. 1A is an explanatory diagram seen from the sliding surface side, and Fig. 1B is an explanatory diagram seen from the coil side on the opposite side. It is an explanatory diagram.

The core slider 10 is a tunnel erase type head core 1
2 and non-magnetic outriggers 14.1 glued on both sides.
Consists of 6. Such a core slider 10 is adhesively fixed to a printed wiring board 18 on its rear surface (the surface opposite to the sliding surface). The printed wiring board 18 is
It has a structure in which a large number of conductive patterns 20 of a predetermined shape are formed on the back surface, and holes are formed into which the head core 12 and coils are inserted, and is made of a glass-based epoxy resin substrate, a ceramic substrate, or the like.

A read/write coil 22 is attached to the leg of the head core 12.
An erase coil 24 is wound thereon, and a bank core 26 is attached to the read/write core side. The four terminals of the read/write coil 22 (two of which are grouped together) and the two terminals of the erase coil 24 are each connected to a predetermined conductive pattern 20. line 28
is connected between the head core 12 and one of the conductive patterns.

The printed wiring board 18 is designed to be slightly larger than the sliding surface of the core slider 10, and the coil terminal is connected to the conductive pattern 2.
0, assembly of the magnetic head is completed. Such a magnetic head may have a structure common to both sides of the magnetic recording medium, ie, side 0 and side l.

Such a magnetic head can be mounted on the carriage arm as is. Figure 2 shows an example of the carriage arm on side 0, and Figure 3 shows an example of the carriage arm on side l.The shape of the gimbal part is different, but in either case, it is made of a thin metal plate formed into a predetermined shape. It has a structure in which a gimbal portion 30° 32 is integrally molded into the carriage body 34. The gimbal portions 30 and 32 are provided with grooves 36 around the periphery to provide appropriate flexibility and achieve a good head posture.
and the printed wiring board 18 in the center.
A slightly smaller attachment has a hole 38.

And the gimbal part 30 of such a carriage arm.
A magnetic head as shown in FIG. 1 is fixed to 32.

Figures 4 and 5 show the state in which the magnetic head is fixed and wired to the gimbal part 30, 32. Figure 4 shows side 0, Figure A is an explanatory diagram as seen from the coil side, and Figure B is an explanatory diagram. It is an explanatory view seen from the slider side. Figure 5 shows side l;
Figure A is an explanatory diagram seen from the coil side, and Figure B is an explanatory diagram seen from the slider side. In any case, multi-core shielded wire 4
0, fix it to the carriage body 34, and connect each lead! 42 is connected to a corresponding conductive pattern 20 formed on the printed wiring board 18. Since the orientation of the core slider lO is 180 degrees different between side 0 and side 1, for side 0, the lead wire 42 is connected by passing through the tip of the middle ridge, and for side l, the lead wire 42 is connected to the base end. It has a structure that allows it to be pulled out directly from the side in the shortest distance.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to such a structure. In the above embodiment, the magnetic head is mounted on a flexible gimbal portion on both side 0 and side l. However, in some cases, it may be possible to combine side 0 without providing a gimbal part and to mount it directly on the carriage body, and side 1 to be mounted on the gimbal part.

[Effects of the Invention] As described above, the present invention has a structure in which a magnetic head is assembled by directly fixing the core slider to the printed wiring board and connecting the coil terminal to the conductive pattern, so the core slider is bonded onto the gimbal plate. Unlike the conventional technology, side 0 and side 1 can be made common, which reduces assembly man-hours and component management costs, leading to cost reduction.

Furthermore, in the present invention, the path from which the end of the thin coil wire is pulled out and connected to the conductive pattern is on the electrically insulating material, so even if the wire coating is damaged, there is no risk of short circuit or continuity to the ground. This has the effect of increasing reliability as it can be held firmly by resin etc.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1A and B are explanatory diagrams showing an example of the magnetic head according to the present invention, and FIG. 2 is an explanatory diagram of a side O carriage arm suitable for incorporating the magnetic head according to the present invention. 3 are explanatory diagrams of the carriage arm of side 1, FIGS. 4A and 4B are explanatory diagrams of assembly of side O, and FIGS. 5A and B are explanatory diagrams of assembly of side 1. 10...Core slider, 12...Head core, ■8
... Printed wiring & 1 board, 20... Conductive pattern,
22... Read/write coil, 24... Erase coil, 30. 32... Gimbal section, 34...
- Carriage body. Patent Applicant: Fuji Electrochemical Co., Ltd. Agent: Minoru Shigemi Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. The core slider incorporating the head core is directly fixed to a printed wiring board on which a conductive pattern for relaying the coil terminals is formed, and the terminals of the coil wound around the legs of the head core are connected to the conductive pattern. A magnetic head characterized by being able to be mounted on the tip of a carriage arm.