JPH0729140A - Magnetic head assembly - Google Patents

Abstract

PURPOSE:To stabilize a load to be added to a magnetic head core. CONSTITUTION:A suspension 1 is constituted to have two conductive parts electrically insulated each other. A magnetic head core 5 is connected to a front end of the suspension electrically. A rear end of the suspension is electrically connected to a signal line of a flexible printed board 8. Accordingly, a tube to pass the signal line is eliminated, whereby the distance of two suspensions is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head assembly used in a magnetic disk device.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing an example of a conventional magnetic head assembly.

As shown in FIG. 3, a conventional magnetic head assembly used in a magnetic disk drive has a magnetic head core 19 for recording or reproducing information on a recording medium and a gimbal spring 21 for holding the magnetic head core 19. When,
The suspension 14 carries a gimbal spring 21 at its tip and applies a constant load to the magnetic head core 19.

The two suspensions 14 sandwich the head arm 18 from both sides together with a spacer 17 provided on the outer side at the rear end, and the signal line 20 for taking out an electric signal from the magnetic head core 19 has one end. It is connected to the magnetic head core 19 and the other end is connected to the signal line tube 16
The signal line tube 16 is attached to the head arm 18 by being pulled out from the rear surface (the surface opposite to the surface on which the magnetic head core 19 is mounted) of the suspension 14 to the side surface.

[0005]

As described above, in the conventional magnetic head assembly, the signal line tube for passing the signal line is pulled out from the rear surface of the suspension to the side surface and is attached to the head arm. It is impossible to make the interval of the suspension smaller than the outer diameter of the signal line tube, and this has a drawback that it hinders the miniaturization of the magnetic disk device.

Further, since the signal line tube is fixed to the suspension and the spacer on both sides of the leaf spring portion at the rear portion of the suspension for applying a constant load to the magnetic head core, the elasticity of the signal line tube itself and 2 A load is generated by the contact of the individual signal line tubes, and this load is superimposed on the load by the leaf spring portion of the suspension, so that there is a problem that the load applied to the magnetic head core fluctuates.

[0007]

A magnetic head assembly according to the present invention is a magnetic head core for recording or reproducing information on a recording medium, a gimbal spring for holding the magnetic head core, and the gimbal spring at the tip. And two suspensions each having a conductive portion that carries the conductive portion and is insulated from each other, and a signal line connected to the magnetic head core is connected to a tip portion of the conductive portion of the suspension, The rear end portion is connected to a signal line connecting to the outside, and particularly, the rear end portion of the conductive portion of the suspension is connected to a signal line of a flexible printed circuit board connecting to the outside.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention.

In FIG. 1, a magnetic head core 3 for recording or reproducing information on a recording medium is mounted on and held by a gimbal spring 5. The gimbal spring 5 is held at the tip of the conductive suspension 1 via the insulating material 13. The suspension 1 has two electrically conductive portions that are electrically insulated from each other, and each electrically conductive portion has a signal line connecting portion 6 a on the surface holding the gimbal spring 5. The suspension 1 also has a signal line connecting portion 6b at the end of the rear end portion that holds the head arm 7, and the signal line connecting portion 6b is connected to the signal line 9 of the flexible printed board 8. .

The suspension 1 and the spacer 1 on the outside thereof
An insulating material 12 is interposed between the two suspensions 1, and a head arm 7 and an insulating material 11 are interposed between the two suspensions 1.

The signal line 4 electrically connects the magnetic head core 3 and the signal line connecting portion 6a of the suspension 1 and transmits an electric signal from the magnetic head core 3 to the conductive portion of the suspension 1. Therefore, by directly connecting the signal line connecting portion 6b at the rear end of the suspension 1 to the signal line 9 of the flexible printed board 8 by soldering or the like,
An electric signal from the magnetic head core 3 can be transmitted to the outside via the flexible printed board 8.

With the above-mentioned structure, since the signal line tube for passing the signal line is not necessary, the interval between the two suspensions can be narrowed and the load applied to the magnetic head core can be stabilized. .

FIG. 2 is a perspective view showing a second embodiment of the present invention.

The magnetic head core 24, the gimbal spring 27, and the suspension 22 of this embodiment have the same structure as that of the embodiment of FIG. 1, but the method of assembling the suspension 22 and the head arm 37 is different.

That is, the magnetic head core 24 is mounted and held on a gimbal spring 27, and the gimbal spring 27 has a conductive suspension 2 having two conductive portions electrically insulated from each other by an insulating material 28.
It is held at the tip of No. 2. Each conductive portion of the suspension 22 has a signal line connecting portion 26 on the surface holding the gimbal spring 27, and the signal line 25 is a signal line connecting portion 26 of the magnetic head core 24 and the suspension 22.
Are electrically connected to each other, and an electric signal from the magnetic head core 24 is transmitted to the conductive portion of the suspension 22.

The two suspensions 22 are made of an insulating material 30.
It is directly connected via the one suspension 2
A spacer 32 is coupled to the outside of the suspension 2 via an insulating material 29, and an insulating material 3 is attached to the outside of the other suspension 22.
The head arm 37 is connected via 1.

A flexible printed circuit board 35 having a signal line 36 is coupled to the head arm 37, and the signal line connecting portion 33 at the rear end portion of the suspension 22 is soldered or the like to the signal line connecting portion 34 of the signal line 36. The electric signal from the magnetic head core 24 can be transmitted to the outside via the flexible printed board 35 by connecting to the.

The operation and effect of the magnetic head assembly constructed as described above are the same as those of the embodiment of FIG.

[0020]

As described above, in the magnetic head assembly of the present invention, the suspension is constructed to have two electrically conductive parts which are electrically insulated from each other, and the magnetic head core is electrically connected to the tip of the suspension. By electrically connecting the rear end of the suspension to the signal line of the flexible printed circuit board, there is an effect that a signal line tube for passing the signal line can be eliminated.
Therefore, the distance between the two suspensions can be reduced, and
This has the effect of stabilizing the load applied to the magnetic head core.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing an example of a conventional magnetic head assembly.

[Explanation of symbols]

 1 ・ 14 ・ 22 Suspension 2 Leaf spring part 3 ・ 19 ・ 24 Magnetic head core 4.9 ・ 9 ・ 20 ・ 25 ・ 36 Signal line 5 ・ 21 ・ 27 Gimbal spring 6a ・ 6b ・ 26 ・ 33 ・ 34 Signal line connection part 7 ・18/37 Head Arm 8/35 Flexible Printed Circuit Board 10/17/32 Spacer 11/12/13/28/29/30/31 Insulation 16 Signal Line Tube

Claims (2)

[Claims] 1. A magnetic head core that records or reproduces information on a recording medium, a gimbal spring that holds the magnetic head core, and two conductive portions that carry the gimbal spring at their tips and are insulated from each other. Two suspensions are provided, the signal line connected to the magnetic head core is connected to the tip of the conductive part of the suspension, and the rear end of the conductive part of the suspension is connected to a signal line connected to the outside. A magnetic head assembly characterized by the above. 2. The magnetic head assembly according to claim 1, wherein a rear end portion of the conductive portion of the suspension is connected to a signal line of a flexible printed circuit board which is connected to the outside.