JPS61129725A - Magnetic head - Google Patents

Abstract

PURPOSE:To adhere closely a head chip onto a floppy disc at all times by mounting a spacer with a prescribed height to a head chip holding face and bonding and fixing an edge of a printed wiring board to the spacer. CONSTITUTION:After a gimbal spring 15 is fixed to a prescribed position of a fixed section or an arm, a head chip 26 is in contact onto a floppy disc for recording and reproduction. In this case, the head chip 26 moves in response to deformation of the floppy disc because of warp of the floppy disc and keeps close contact state. The movement of the head chip 26 in response to the floppy disc means that the head chip holding face 18 is turned around turning shafts 19, 20 and since the flexible printed wiring board 30 is floated from the head chip holding face 18 by a spacer 29, the turning operation is not hindered. Thus, the close contact of the head chip 26 onto the floppy disc is kept in an excellent way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head used in floppy disk drives and the like.

BACKGROUND OF THE INVENTION In general, in this type of magnetic head, the head chip is attached to a gimbal spring so that the head chip always comes into perpendicular contact with the surface of the floppy disk even if the surface is wavy. Electrical connection to the head chip is made by a flexible print 1-wiring board. An example thereof will be explained based on FIGS. 3 to 5.

First, in the square gimbal spring 1, an intermediate frame 4 is connected to a mounting surface 2 located on the outer periphery via a pivot shaft 3, and the pivot shaft 3 and its position are rotated by 90 degrees with respect to the intermediate frame 4. A head chip holding surface 6 is connected via a pivot shaft 5 located at this position. An escape hole 7 is formed in the center of this head chip holding surface 6. A head chip 8 is adhesively fixed to the head chip holding surface 6.
(Nacore 9, slider 10, coil 11 wound around the core 9, and back bar 1 fixed to the end of the core 9)
2 and a lead wire 13 drawn out from the coil 11. An end portion of a flexible printed wiring board 14 is adhesively fixed to the t\rad support surface 6 opposite to the surface on which the core 9 held by the slider 10 is provided. This flexible printed wiring board 1
4 is connected to the lead wire 13.

Problems to be Solved by the Invention The gimbal spring 1 has its mounting surface 2 fixed to a fixed part or a movable part such as an arm.
Since the contact surfaces of the head chip 8 which contact the floppy disk are perpendicular to each other, the contact surface of the head chip 8 that contacts the floppy disk always changes to be perpendicular to the surface of the floppy disk. That is, the head chip holding surface 6 is movable in all directions. However, since the flexible printed wiring board 14 is attached to the head chip holding surface 6, the ends of the flexible printed wiring board 14 must also move integrally with the spatula 1 to chip holding l'riI(3). This flexible printed wiring board 14 is different from the intermediate flannel 14 in the shape of a white fa, but the head chip holding surface 6
The spatula I comes into contact with the intermediate frame 4 and the mounting surface 2 during the fluctuation of the chip holding surface 6, and obstructs the movement of the chip holding surface 6. As a result, the original function of the gimbal spring 1 is not achieved, and the head chip 8 is lifted up from the floppy disk due to the waving of the floppy disk and is no longer in close contact with the floppy disk.
It has the disadvantage of not being able to provide sufficient training.

Means to Solve the Problem By attaching a spacer of a predetermined height to the head chip holding surface and gluing and fixing the end of the printed wiring board to this spacer, the flexible printed wiring board can be attached to the intermediate frame or mounting surface of the gimbal spring. There is no contact, and as a result, the flexible printed wiring board does not obstruct the movement of the head chip holding surface, and the head chip can always be kept in close contact with the floppy disk.

Embodiment An embodiment of the present invention will be explained based on FIG. 1 and FIG. 2. First, the gimbal spring 15 has a mounting surface 16, an intermediate frame 17, and a hent tip holding surface 1, similar to the above-mentioned one.
8 and more. The mounting surface 16 and the intermediate frame 17
A pivot shaft 19 is provided between the intermediate frame 1 and
A pivot shaft 20 is provided between the head chip holding surface 18 and the head chip holding surface 18 in a direction perpendicular to the pivot shaft 19 . A rectangular relief hole 21 is formed in the center of the head chip holding surface 18.

Thus, a head chip 26 is formed which includes a core 22, a slider 23, a coil 24, and a banker 25. In this head chip 26, the slider 23 is adhesively fixed to one surface of the helad chip holding surface 18, and a part of the coil 24 thereof is made to protrude upward from the escape hole 21. A bobbin 28 having terminals 27 connected to the coils 24 is attached to the ends of the coils 24. Further, a spacer 29 which also serves as a reinforcing plate is adhesively fixed to the head chip holding surface 18. An end portion of a flexible printed wiring board 3o is adhesively fixed to the upper surface of this spacer 29. The flexible printed wiring board 30 and the terminals 27 have the same height and are electrically connected by automatic soldering. Further, 31 is a connection portion of the flexible printed wiring board 30.

In such a configuration, after the gimbal spring 15 is fixed at a predetermined position such as a fixed part or an arm, the head chip 26 is joined to a floppy disk (not shown) to perform recording and reproduction. At this time, the head chip 26 moves according to the shape of the floppy disk due to the undulation of the floppy disk, and maintains a state in which it is in complete contact with the floppy disk. The fact that the head chip 26 moves in response to the floppy disk in this way is that the head chip holding surface 18 rotates around the pivot axis 19,20, and such rotation! FIJ operation is performed by flexible printed wiring board 30
Since the head is moved from the head chip holding surface 18 seven times faster by the spacer 29, its movement is not hindered. Therefore, the head chip 26 for the floppy disk
Adhesion is maintained well.

In actual practice, the height of the terminal 27 of the bobbin 28 will vary depending on the product specifications, but even in that case, the height of the terminal 27 and the flexible printed wiring board 30 can be adjusted by appropriately changing the height of the spacer 29. This makes it easier to perform automatic soldering.

Effects of the Invention In the present invention, a spacer of a predetermined height is attached to the head chip holding surface on which the head chip is attached as described above, and the end of the flexible printed wiring board is adhesively fixed to this spacer. This prevents the flexible print 1 to the wiring board from becoming a hindrance to fluctuations.

The head chip can be brought into close contact with the floppy disk, and by using a bobbin with a terminal, the end 1'' of the bobbin can be automatically soldered to the flexible printed circuit board.

[Brief explanation of the drawing]

Figure 2 is a perspective view showing an embodiment of the present invention, Figure 2 is a side view thereof, Figure 3 is a perspective view of a conventional example, Figure 4 is a side view, and Figure 5 is a plan view. . 15...Gimbal spring, 16...Mounting surface, 18...Head chip holding surface, 19.20...Swivel axis, 26...Hent tip, 27...Terminal, 28...Bobbin, 2...
Spacer, 30...Flexible printed wiring board Applicant: Tokyo Electric Co., Ltd. Engraving of drawings (no changes in content). Procedure details (formula) April 23, 1985 Patent Application No. 59-250712 2 Name of the invention Magnetic head 4 Agent 107 Address 5-9-15 Minami-Aoyama, Minato-ku, Tokyo 1986 Year 3
May 26th (shipment date) Drawings subject to 6° correction

Claims (1)

[Claims] 1. A gimbal spring having a head chip holding surface connected to a mounting surface located on the outer periphery via a pivot shaft is provided, and a predetermined height is provided on the head chip holding surface to which the head chip is fixed. 1. A magnetic head, wherein a spacer having a diameter is attached, and an end portion of a flexible printed wiring board connected to the head chip is adhesively fixed to the spacer. 2. A gimbal spring having a head chip holding surface connected to the mounting surface located on the outer periphery via a pivot axis is provided, and a spacer having a predetermined height is attached to the head chip holding surface to which the head chip is fixed. . A magnetic head, wherein a bobbin with a terminal is connected to the head chip, and an end portion of a flexible printed wiring board connected to the terminal of the bobbin is adhesively fixed to the spacer.