JP2005149577A - Actuator for disk and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the manufacture cost of an actuator for a hard disk. <P>SOLUTION: The actuator for the hard disk comprises a bearing 11, a spacer 12 adhered to the outer periphery of the bearing 11, two arms 13 and 14 positioned across the spacer 12, a coil 15, a latch plate 16 made of stainless, and a resin 17 for integrally forming the bearing 11, the spacer 12, the arm 13, the arm 14, the coil 15 and the latch plate 16. Since the need of a process of adhering the bearing after resin molding is eliminated, the manufacture cost is reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disk actuator and a manufacturing method thereof, and more particularly to a disk actuator having a structure capable of reducing manufacturing costs and a manufacturing method thereof.

Conventionally, there has been known a hard disk arm in which three arms are stacked with a spacer interposed therebetween, a C ring is inserted into a fitting hole formed in the arm and the spacer, and the arm, spacer, C ring and coil are integrated with resin. (For example, refer to Patent Document 1).
JP-A-9-233799

In the conventional hard disk arm, a bearing is inserted into the C-ring and integrated by bonding to form a disk actuator.
However, there is a problem that the manufacturing cost is increased because the operation of inserting the bearing into the C ring and integrating it by bonding is necessary.
SUMMARY OF THE INVENTION An object of the present invention is to provide a disk actuator having a structure capable of reducing the manufacturing cost and a method for manufacturing the same.

In a first aspect, the present invention relates to a bearing, a spacer bonded to the outer periphery of the bearing, two arms positioned with the spacer interposed therebetween, or one arm positioned in contact with the spacer. A disk actuator comprising: a coil; a latch plate; and a resin or an alloy in which the bearing, spacer, arm, coil, and latch plate are integrated.
In the disk actuator according to the first aspect, since the bearing, spacer, arm, coil, and latch plate are integrated with resin or alloy, it is not necessary to insert the bearing later and integrate it by bonding. For this reason, manufacturing cost can be reduced.

In a second aspect, the present invention provides a bearing, two or more spacers bonded to the outer periphery of the bearing, three or more arms positioned with the spacer interposed therebetween, a coil, the bearing, the spacer, Provided is a disk actuator comprising a resin or an alloy in which an arm and a coil are integrated.
In the disk actuator according to the second aspect, the bearing, the spacer, the arm, and the coil are integrated with resin or alloy, so that it is not necessary to insert the bearing later and integrate it by bonding. For this reason, manufacturing cost can be reduced.
In addition, you may integrate with resin or an alloy including components other than a bearing, a spacer, an arm, and a coil.

In a third aspect, the present invention relates to a method in which a spacer is bonded to the outer periphery of the bearing, and two arms are attached to the bearing with the spacer interposed therebetween, or one arm is attached to the bearing in contact with the spacer. The bearing, the spacer, and the arm are disposed in the mold, the coil and the latch plate are disposed in the mold, and a resin or an alloy is injected into the mold and cured to be integrated. Provided is a method for manufacturing a disc actuator.
In the disk actuator manufacturing method according to the third aspect, the disk actuator according to the first aspect can be preferably manufactured.

In a fourth aspect, the present invention relates to a method in which a spacer is bonded to the outer periphery of a bearing, two arms are attached to the bearing with the spacer interposed therebetween, and another spacer is attached to the bearing so as to abut on the already installed arm. Adhering and abutting the spacer and attaching another arm to the bearing is repeated one or more times, the bearing, the spacer and the arm are disposed in the mold, and the coil is disposed in the mold. A method of manufacturing a disk actuator is provided, in which a resin or an alloy is injected into the mold and cured to be integrated.
In the disk actuator manufacturing method according to the fourth aspect, the disk actuator according to the second aspect can be preferably manufactured.

  According to the disk actuator and the manufacturing method thereof of the present invention, the manufacturing cost can be reduced.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

1 and 2 are perspective views illustrating the hard disk actuator 10 according to the first embodiment. In FIG. 1, the resin 17 is seen through.
The hard disk actuator 10 includes a bearing 11, a spacer 12 bonded to the outer periphery of the bearing 11, two arms 13 and 14 positioned with the spacer 12 interposed therebetween, a coil 15, and a stainless latch plate 16. And a resin 17 in which the bearing 11, the spacer 12, the arm 13, the arm 14, the coil 15, and the latch plate 16 are integrated.

The bearing 11 is a deep groove ball bearing or a roller bearing.
The spacer 12 is a disk-shaped member having a hole with an inner diameter slightly larger than that of the bearing 11 and is made of stainless steel.
The arms 13 and 14 are plate-like members that hold the magnetic head, and are formed by punching a stainless steel plate.
The coil 15 is a voice coil for moving the magnetic head.
The latch plate 16 is a member for positioning the magnetic head, and is made of stainless steel.
The resin 17 is a liquid crystal resin.

FIG. 3 is a flowchart showing a manufacturing process of the hard disk actuator 10.
In step S1, as shown in FIG. 4, the bearing 11 is fitted into the hole of the spacer 12 and fixed with an adhesive.

  In step S2, the arms 13 and 14 are attached to the bearing 11 so as to sandwich the spacer 12, as shown in FIG.

  In step S3, as shown in FIG. 6, the bearing 11, the spacer 12, the arms 13, 14, the coil 15, and the latch plate 16 are arranged in a mold (not shown).

In step S4, the mold is closed and a fluid resin is injected.
In step S5, when the resin (17 in FIG. 2) is cured, the hard disk actuator 10 is removed from the mold.

  One of the arms 13 and 14 may be omitted.

As shown in FIG. 7, similarly to the first embodiment, the arms 13 and 14 are attached to the bearing 21 so as to sandwich the spacer 12. Then, another spacer 22 is bonded to the bearing 21 so as to contact the arm 14.
Next, as shown in FIGS. 8 and 9, another arm 24 is attached to the bearing 21 in contact with the spacer 22.
As described above, the three arms 13, 14, and 24 may be attached to the bearing 21.
Further, the same operation as described above may be repeated to attach the four arms to the bearing 21.

  Instead of the resin 17, for example, an aluminum alloy may be used.

  The disk actuator of the present invention can be used as a hard disk actuator, an optical disk actuator, or a magneto-optical disk actuator.

1 is a partially transparent perspective view showing a hard disk actuator according to Embodiment 1. FIG. 1 is a perspective view showing a hard disk actuator according to Embodiment 1. FIG. FIG. 5 is a flowchart showing manufacturing steps of the hard disk actuator according to the first embodiment. It is a perspective view which shows a bearing and a spacer. It is a perspective view which shows a bearing, a spacer, and an arm. It is a perspective view which shows the state which has arrange | positioned the bearing, the spacer, the arm, the coil, and the latch plate in the metal mold | die. It is a perspective view which shows another spacer. It is a perspective view which shows another arm. It is a perspective view which shows a bearing, a spacer, and an arm.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hard disk actuator 11, 21 Bearing 12, 22 Spacer 13, 14, 24 Arm 15 Coil 16 Latch plate 17 Resin

Claims (4)

  The bearing (11), the spacer (12) bonded to the outer periphery of the bearing (11), and the two arms (13, 14) or the spacer (12) positioned with the spacer (12) interposed therebetween One arm positioned in contact with the coil, a coil (15), a latch plate (16), the bearing (11), a spacer (12), an arm (13, 14), a coil (15), and a latch plate A hard disk actuator (10) comprising a resin (17) or an alloy integrated with (16).   Bearing, two or more spacers bonded to the outer periphery of the bearing, three or more arms positioned with the spacer interposed therebetween, a coil, and a resin or alloy in which the bearing, the spacer, the arm and the coil are integrated A hard disk actuator characterized by comprising:   A spacer (12) is bonded to the outer periphery of the bearing (11), and two arms (13, 14) are attached to the bearing (11) with the spacer (12) interposed therebetween, or abut against the spacer (12). One arm is attached to the bearing (11), the bearing (11), the spacer (12), and the arms (13, 14) are arranged in the mold, and the coil (15) and the latch plate (16 ) Is placed in the mold, and a resin (17) or alloy is injected into the mold and cured to be integrated.   A spacer is bonded to the outer periphery of the bearing, and two arms are attached to the bearing with the spacer interposed therebetween. Another spacer is bonded to the bearing so as to contact the already installed arm, and the spacer is in contact with the spacer. The mounting of the arm to the bearing is repeated one or more times, the bearing, the spacer, and the arm are disposed in the mold, the coil is disposed in the mold, and a resin or alloy is injected into the mold. And curing and integrating them, a method for manufacturing an actuator for a hard disk.

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