JPH0512817A - Mechanism for supporting magnetic head of magnetic disk device - Google Patents

Abstract

PURPOSE:To facilitate exchanging of a magnetic head assembling body stuck on even after completing the assemblage of a device by making an area where a head-arm part comes into contact with a spacer smaller than the area of the spacer, forming the part of the spacer projecting from the head-arm part and drawing the projecting part. CONSTITUTION:The magnetic head 4 is fitted to a gimbal 2 and the gimbal 2 is fitted to a load-arm 3, then the load-arm 3 is fitted into the spacer 1. The spacer 1 is stuck on the head-arm part 15. The area where the head-arm part 15 comes to contact with the spacer 1 is smaller than the area of the spacer 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head supporting mechanism for a magnetic disk device, and more particularly to a method for fixing a head arm portion of a carriage and a magnetic head assembly.

[0002]

2. Description of the Related Art A conventional magnetic disk drive has a carriage and a magnetic head assembly. The carriage has a plurality of head arms that are integrally formed. The magnetic head assembly has a magnetic head, a gimbal, a load arm and a spacer. The magnetic head is bonded to the gimbal. The gimbal is spot welded to the load arm. The load arm is spot welded to the spacer. The spacer is fixed to the tip of the head arm portion. This fixing method includes
For example, there are caulking and screwing.

Conventionally, as disclosed in Japanese Patent Laid-Open No. 2-156489, the spacer is screwed to the arm in the axial direction (direction orthogonal to the stacking direction of the arms) to facilitate replacement of the magnetic head assembly. There was technology.

[0004]

With the increase in capacity of magnetic disk devices in recent years, high density mounting of magnetic disk and magnetic head assemblies is required. The head assembly can be made thinner and the head arm can be made thinner.

It is difficult to use the screwing technique in order to reduce the stacking interval of the magnetic disks. So, as one way to realize this,
It has been attempted to reduce the stacking interval of magnetic disks by replacing the conventional magnetic head assembly with a screw method and replacing it with an adhesive method.

However, when fixed using an adhesive,
In the case of the integral carriage in which a plurality of arms are integrally formed, it is difficult to replace only one magnetic head.

An object of the present invention is to magnetically facilitate the replacement work of an arbitrary magnetic head assembly when the magnetic head assembly is adhered to a magnetic head support mechanism having an integral carriage integrally formed with a plurality of arms. It is to provide a head support mechanism.

[0008]

In order to achieve the above object, in a magnetic head supporting mechanism of a magnetic disk device in which a spacer and a head arm portion are fixed by using an adhesive, the spacer once attached to the head arm portion. It is intended to provide a structure in which members can be easily removed. Specifically, the area of contact between the head arm portion and the spacer is made smaller than the total area of the spacer.
The length of the spacer in the direction perpendicular to the longitudinal direction of the head arm portion is longer than the length of the head arm portion (the same direction as the spacer) in contact with the spacer. Alternatively, the length of the spacer in the longitudinal direction of the head arm portion is longer than the length of the head arm portion (the same direction as the spacer) in contact with the spacer.
By doing so, the spacer portion projects from the head arm portion, so that the spacer and the head arm that have been once bonded can be easily removed by pulling the projecting portion.

[0009]

By making the area of contact between the head arm portion and the spacer smaller than the area of the spacer, the spacer projects from where it is adhered. Therefore, by pulling the protruding portion of this spacer, the spacer is once adhered. The spacer and head arm can be easily removed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a block diagram of a magnetic disk device according to an embodiment of the present invention. FIG. 4 is a configuration diagram of a magnetic head support mechanism of an embodiment of the present invention.

The magnetic head assembly has a magnetic head 4, a gimbal 2, a load arm 3 and a spacer 1. The magnetic head 4 is bonded to the gimbal 2. The gimbal 2 is spot-welded to the load arm 3. The load arm 3
Spot welded to the spacer 1. The spacer 1 is bonded to the arm tip portion 6 of the head arm portion 15. Since the load arm 3 is thin, its strength is weakened when it is directly bonded to the head arm portion 15. Therefore, the spacer 1 reinforces the strength.

The magnetic head support mechanism has a magnetic head assembly and a carriage 5. The carriage 5 is integrally formed with the plurality of head arm portions 15 by die casting. A magnetic head assembly is fixed to the arm tip portion 6 of the head arm portion 15 by adhesion. Carriage 5
Has a coil 7, a bearing 8 and a circuit board 9. The bearing 8 rotatably supports the carriage 5. The circuit board 9 amplifies a signal read by the magnetic head 4, for example.

The magnetic disk device is a magnetic disk 10.
It has a spindle motor 11, a base 12, a shaft 13, a magnet 14, and a magnetic head support mechanism. The shaft 13 is fixed to the base 12 and rotatably supports the magnetic head support mechanism. Magnet 14
Is fixed to the base 12 and drives the magnetic head support mechanism together with the coil 7 to move the magnetic head 4 to the magnetic disk 10
Position at any radial position of. Spindle motor 1
1 rotates the magnetic disk 10.

FIG. 1 shows a spacer 1 according to an embodiment of the present invention.
2 is a diagram showing a part of a magnetic head support mechanism in which a lateral width (a direction perpendicular to a longitudinal direction of the head arm portion 15) of an adhesion surface of an arm tip portion 6 of a head arm portion 15 for adhering and fixing the head arm portion 15 is smaller than a lateral width of a spacer 1. FIG. is there. In the figure, the thickness of the spacer is emphasized for clarity.
In reality, it is very thin (the same applies to other drawings below). What is indicated by an arrow is the width of the bonding surface of the arm tip portion 6. On the right side, a top view is shown on the upper side, and on the lower side, a side view is shown. On the left side, a cross-sectional view of the spacer 1 and the arm tip portion 6 when cut along the arrow is shown. In the magnetic disk device having the above-described structure, the outer side of the spacer 1 is held when the head assembly is exchanged by making the lateral width of the adhesive surface of the arm tip portion 6 for adhesively fixing the spacer 1 smaller than the lateral width of the spacer 1. It is possible to peel off the adhesive part easily.

FIG. 2 is a view showing a part of a magnetic head support mechanism according to another embodiment of the present invention in which a C chamfer 16 is provided on the arm tip 6 of the head arm 15. What is indicated by an arrow is the lateral width of the bonding surface of the arm tip portion 6 (direction perpendicular to the longitudinal direction of the head arm portion 15). A top view and a side view are shown on the right side, and a cross-sectional view of the spacer 1 and the arm tip portion 6 when cut along the arrow is shown on the left side. The C chamfered portion 16 of the arm tip 6 forms a wedge-shaped cavity when the spacer 1 is adhesively fixed. When exchanging the head assembly, use the gap of this wedge-shaped recess and insert a tool whose tip fits into this gap, for example, insert a wedge-shaped tool and apply force to press it from both sides. This makes it easier to separate the magnetic head assembly from the arm tip 6.

FIG. 5 is a view showing a part of a magnetic head support mechanism in a case where the corner portion of the arm tip portion 6 has a recess according to another embodiment of the present invention. A top view and a side view are shown on the right side, and a cross-sectional view of the spacer 1 and the arm tip portion 6 when cut along the arrow is shown on the left side. The arrow points in a direction perpendicular to the longitudinal direction of the head arm portion 15. What is indicated by a dotted line in the top view is the recess of the arm tip portion 6. In the side view, the front side is shown by a solid line and the opposite side is shown by a dotted line. Arm tip 6
It is possible to separate the magnetic head assembly from the arm tip 6 by using the depressions at the corners of the.

FIG. 6 shows a magnetic head support according to another embodiment of the present invention in which the width of the bonding surface of the arm tip portion 6 in the vertical direction (longitudinal direction of the head arm portion 15) is smaller than the width of the spacer in the vertical direction. It is a figure which shows a mechanism. The arrow indicates the arm tip 6 of the head arm 15 and the spacer 1.
It is the vertical width of the adhesive surface with. Since the vertical width of the bonding surface of the arm tip portion 6 is made smaller than the vertical width of the spacer, it becomes possible to hold the outer side of the spacer 1 when replacing the head assembly, and peeling off the bonding portion. Easy to do.

[0019]

According to the present invention, the contact area between the head arm portion and the spacer is made smaller than the area of the spacer, so that the magnetic head assembly can be easily replaced even after the assembly of the apparatus is completed.

[0020]

[Brief description of drawings]

FIG. 1 is a diagram showing a magnetic head support mechanism according to an embodiment of the present invention in which a lateral width of an adhesive surface of an arm tip portion of a head arm portion for adhesively fixing a spacer is smaller than a lateral width of a spacer.

FIG. 2 is a diagram showing a magnetic head support mechanism according to another embodiment of the present invention, in which a C chamfered portion is provided at the arm tip portion of the head arm portion.

FIG. 3 is a configuration diagram of a magnetic disk device according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a magnetic head support mechanism according to an embodiment of the present invention.

FIG. 5 is a diagram showing a part of a magnetic head support mechanism according to another embodiment of the present invention when a corner portion of an arm tip portion has a recess.

FIG. 6 is a view showing a magnetic head support mechanism according to another embodiment of the present invention in which a vertical width of an adhesive surface of an arm tip portion of a head arm portion is smaller than a vertical width of a spacer.

[Explanation of symbols]

1 ... Spacer, 2 ... Gimbal, 3 ... Road arm, 4 ...
Magnetic head, 5 ... Carriage, 6 ... Arm tip, 7 ...
Coil, 8 ... Bearing, 9 ... Circuit board, 10 ... Magnetic disk, 11 ... Spindle motor, 12 ... Base, 13
... shaft, 14 ... magnet, 15 ... head arm part, 16 ... C chamfer part.

Claims (2)

[Claims] 1. In a magnetic head supporting mechanism of a magnetic disk device, wherein a load arm supporting a magnetic head is bonded to a head arm via a spacer, a part of the spacer is bonded to the head arm, and the spacer is the head arm. A magnetic head support mechanism for a magnetic disk drive, characterized in that it has a protruding portion. 2. In a magnetic head supporting mechanism of a magnetic disk device, wherein a load arm supporting a magnetic head is bonded to a head arm via a spacer, an area where the head arm and the spacer contact each other is larger than an area of the spacer. A magnetic head support mechanism for a magnetic disk device, which is characterized by being made smaller.