JPH07220427A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To easily and positively wire a lead wire connected to a magnetic head when the head arm of a magnetic disk device is made of a metal thin plate. CONSTITUTION:A head arm for moving a magnetic head to the specific position of a magnetic disk by a voice coil motor is constituted by laminating and placing a plurality of arms constituted of sheet metal via a spacer, where a fixing fitment is fixed to one side surface of the bearing part of a head arm and the pad part of a head substrate where a lead wire connected to the magnetic head is applied to the fixing fitment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relatively small magnetic disk device suitable for use in laptops, notebook computers and the like.

[0002]

2. Description of the Related Art Due to the miniaturization of computers, there is a demand for miniaturization of magnetic disk devices used as external storage devices for such computers.

On the other hand, a head arm for moving a magnetic head used in a comparatively small magnetic disk device on the magnetic disk is formed by integrally forging a base arm of a bearing portion of the head arm, and the suspension arm is caulked to the base arm. However, a special device is required for this crimping stop.

Therefore, for example, as disclosed in Japanese Patent Laid-Open No. 5-314685, the head arm is constructed by laminating metal thin plates to improve the assembling workability.

[0005]

However, a so-called flexible substrate is attached to the bearing portion of the head arm for connecting the magnetic head mounted at the tip of the head arm and the head substrate mounted on the base plate constituting the disk device. However, when the head arm is made of a thin metal plate as described above, there is a problem that a space for attaching the flexible substrate cannot be secured.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a head arm for moving a magnetic head to a predetermined position on a magnetic disk by a voice coil motor is formed by stacking a plurality of arms made of sheet metal via a spacer. In this structure, a fixing metal fitting is fixed to one side surface of the bearing portion of the head arm, and a pad portion of the head substrate for connecting the lead wire connected to the magnetic head is attached to the fixing metal fitting.

Further, according to the present invention, a notch groove is formed at a position facing at least one arm of the fixing member, and a lead wire is engaged in the notch groove.

Further, according to the present invention, a part of the arm is engaged in the notch groove of the fixing fitting, and the fixing fitting is fixed to the head arm by screwing one mounting screw into the spacer.

[0009]

After assembling the head arm by arranging a plurality of arms in a stacked manner with the spacer interposed therebetween, the fixing metal fitting is screwed to the spacer, and the pad portion of the head substrate is attached to the fixing metal fitting. By fixing the lead wire connected to the above through the notch groove of the fixing metal fitting and then connecting it to the pad part by soldering etc., it is possible to easily fix the pad part to the head arm and also to attach the lead wire pad. It is possible to quickly solder parts.

When fixing the fixing bracket to the head arm, a part of the arm is engaged and positioned in the notch groove, and then one mounting screw is screwed into the spacer to fix the fixing bracket. By doing so, the fixing bracket can be fixed easily and securely.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described first with reference to FIGS. 1 and 2. (1) is a substantially rectangular base plate formed by molding an aluminum alloy or the like, and a side wall (3) is formed on the outer peripheral edge of the bottom plate (2). ) Is formed, and a mounting hole (5) for mounting the drive motor (4) is drilled at an appropriate position on the bottom plate (2), and the mounting positions of the voice coil motor (6) and the head arm (7) are formed. In addition, a deeper recess (8) is integrally formed.

On the rotating shaft (9) of the drive motor (4), magnetic disks (10) and (10) having a magnetic material adhered to the surface of a glass disk having a diameter of 2.5 inches are attached to a spacer ring. (11), fixing screw (1
It is fixed by 3).

The voice coil motor (6) has a voice coil (14) attached to the rear end of the head arm (7).
The base plate (1) with screws so that it is sandwiched from above and below
The magnetic yokes (15) and (16) fixed to the magnetic yoke (15) and the magnet (17) fixed to the one magnetic yoke (15).

Reference numeral (18) is a head substrate made of a so-called flexible substrate such as a polyester resin film fixed adjacent to the voice coil motor (6) of the base plate (1), and attached to the tip of the head arm (7). A plurality of magnetic heads (19), (19), ..., IC (20) for converting signals to the magnetic heads (19), (19) ,. ) Are integrally formed.

On the other hand, as shown in FIGS. 3 and 4, the head arm 7 is composed of a plurality of thin metal plates.
(22) (22) ... are laminated via spacers (23) (24) made of aluminum alloy etc. by die casting set to a thickness corresponding to the thickness of the magnetic disk (10) (10). Place and
In addition, a bearing (26) such as a ball bearing having a rotating shaft (25) in the center is fixed integrally with a tightening nut (27).

One of the spacers (23) (24) (23) is
The voice coil (14) is integrally connected via a support member (28) made of resin.

Further, suspension arms (29), (29), ... Are connected to the tips of the arms (22), (22), .. by spot welding or the like, and the magnetic heads ( (19) (19) ..., and lead wire (30) connected to this magnetic head at the periphery.
A plurality of locking pieces (31), (31), ... for fixing the (30) ,.

Reference numeral (34) is a fixing metal fitting in which the mounting screw (35) is screwed into the other spacer (24) and fixed to the side surface of the bearing (26) of the head arm (7). As shown also in the above, the pad portion (36) (36) at the tip of the lead portion (21) of the head substrate (18)
Is attached with double-sided tape, adhesive, etc., and notch grooves (37) (37) into which a part of the arms (22) (22)
(37) is formed, and the lead wire (30) (3
0) ・ ・ are fixed in place.

The lead wires (30), (30), ... Are connected to the terminals (38), (38), ... Of the pad portions (36), (36) by soldering.

Reference numeral (39) is a resin protector for fixing the head substrate (18) to the base plate (1).
It is composed of a storage chamber (40) for storing C (20) and the like, and a crimping portion (41) for sandwiching and fixing the peripheral portion of the head substrate (18) between the base plate (1).

Reference numeral (42) is a stopper made of nylon resin, ABS resin or the like fixed between the voice coil motor (6) of the base plate (1) and the head substrate (18), and the head arm (7) is rotated. A pair of abutment portions (43) (44) are integrally formed at intervals corresponding to the range, while the support portion (28) is formed.
A metal fitting (45) made of a magnetic metal such as a steel plate that reciprocates between the abutting portions is fixed to the appropriate position of the head arm (7) by the metal fitting and the abutting portions (43) and (44). The rotation range of) is regulated.

When assembling the head arm (7), the arms (22), (22), ... Are laid on top of each other with the spacers (23) and (24) arranged, and then the bearings (26) and the tightening nuts. (27)
, And then fix the metal fitting (34) in its notch groove.
(37) (37) (37) is fixed to the head arm (7) by screwing the mounting screw (35) into the spacer (24) while engaging a part of the arm (22) (22). To do.

Next, after attaching the pad portions (36) (36) of the head substrate (18) to the fixing metal fitting (34), the magnetic heads (19) (19) ...
The lead wires (30) (30) ··· connected to the suspension arm (29) (29) · · are fixed by the locking pieces (31) (31) · · and the notch groove of the fixing bracket (34) (37) (37) (37) Engage and fix in the lead wire (30) (30) ・ ・ Pat part (36) (3)
It can be assembled by soldering and connecting to terminals (38), (38) ... of 6).

In the above embodiment, the fixing metal fitting (34) is fixed to the head arm (7) with one mounting screw (35).
This is the arm (22) in the notch (37) (37) (37) of the fixing bracket (34).
(22) Since the fixing bracket (34) is securely positioned by engaging a part of (22), the fixing bracket (34) is not limited to this.
May be fixed by a plurality of mounting screws.

In the above embodiment, the magnetic disks (10) (10)
However, the present invention is not limited to this, but is also applicable to one or three or more used. In this case, notches are provided depending on the number of arms (22) (22). Groove (37) (37)
..Increase / decrease, and use this notch groove for all arms (22) (22)
.., but may be formed so as to face at least one arm.

[0026]

According to the structure of the present invention, in a head arm made of sheet metal, a fixing metal fitting is fixed to one side surface of a bearing portion of the head arm, and a head substrate for connecting the lead wire of the magnetic head to the fixing metal fitting. Even if the head arm is made of sheet metal, the pad part can be easily and reliably fixed to the head arm by attaching the pad part.

Further, according to the present invention, a notch groove is formed in the fixing member, and the lead wire is inserted into and fixed to the notch groove.
It is possible to improve workability when soldering the lead wire to the pad part.

Further, since a part of the arm is engaged in the notch groove of the fixing metal fitting, the fixing metal fitting can be surely positioned, and the fixing metal fitting can be surely fixed by, for example, one mounting screw. Can be done.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment according to the present invention.

FIG. 2 is a plan view showing an embodiment according to the present invention.

FIG. 3 is a side view showing an embodiment of a head arm portion according to the present invention.

FIG. 4 is a plan view showing an embodiment of a head arm portion of the same.

FIG. 5 is a side view showing the operation of the head arm portion.

FIG. 6 is a side view showing an embodiment of the main part of the head arm portion.

[Explanation of symbols]

 6 Voice coil motor 7 Head arm 10 Magnetic disk 18 Head substrate 19 Magnetic head 22 Arm 23 Spacer 24 Spacer 26 Bearing 30 Lead wire 34 Fixing bracket 35 Mounting screw 36 Pad part 37 Notch groove

Claims (3)

[Claims] 1. A head arm for moving a magnetic head to a predetermined position on a magnetic disk by a voice coil motor, wherein a plurality of arms made of sheet metal are stacked and arranged with a spacer interposed therebetween. A magnetic disk device characterized in that a fixing metal fitting is fixed to one side surface of the bearing portion, and a pad portion of a head substrate for connecting a lead wire connected to the magnetic head is attached to the fixing metal fitting. 2. The cutout groove is formed at a position facing at least one arm of the fixing bracket, and the lead wire is engaged in the cutout groove.
The magnetic disk device according to 1. 3. A part of the arm is engaged in a notch groove of the fixing metal fitting, and one fixing screw is screwed into the spacer to fix the fixing metal fitting to the head arm. The magnetic disk device according to claim 1.