JP3396909B2 - Magnetic disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive device, which can easily and accurately connect a stator coil and a drive circuit for a motor, and can reduce the assembly cost by reducing the number of parts. It is characterized by its unique structure.

[0002]

2. Description of the Related Art In recent years, magnetic disk drive devices have been required to have high performance and low cost. A conventional magnetic disk drive device will be described below.

FIG . 6 is a sectional view of a conventional magnetic disk drive device. In FIG. 6 , reference numeral 1 is a mounting frame, and a fixed shaft 2 is press-fitted in the central portion thereof.
A stator 3 is annularly arranged on the mounting frame 1 around the fixed shaft 2. As shown in FIG. 7 , this stator has a resin coating layer 5 for insulation formed on each salient pole 4 of an iron core 3 having a plurality of salient poles 4 formed of laminated steel plates, and the resin coating layer 5 is formed on the resin coating layer 5. The stator coils 6 are wound around.

Then, the through hole 8 provided in the center of the iron core 3 is connected to the outside of the connecting projection 9 formed in the frame 1 so as to extend linearly in parallel with the fixed shaft 2. It is fixed to the frame 1.

At the free end of the fixed shaft 2, a rotor frame 12 having a magnetic disk 11 fixed to the outer periphery is rotatably supported via a pair of bearings 10.
A permanent magnet 13 serving as a cylindrical rotor magnet is fixed to the inside of the rotor frame 12 at a constant distance from the salient pole 4 of the stator via a back plate 14. Are configured.
In order to obtain electrical continuity of this motor, the stator coil 6
The line end 6a of the printed wiring board 15 is line-processed to be a relay printed circuit board 15.
It is fixed by soldering.

[0006]

However, in the above-described conventional configuration, the wire end 6a of the stator coil 6 and the relay printed circuit board 15 in the wire treatment and the assembling process of the wire end 6a in the winding process of the stator coil 6 are carried out. However, there was a problem that the soldering work could not be mechanized and the number of assembly steps increased. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and intends to provide a low-priced magnetic disk drive device by reducing the number of assembling steps.

[0007]

In order to achieve this object, a magnetic disk drive apparatus of the present invention is formed on the surface of an iron core in order to obtain insulation between an iron core forming a stator and a stator coil. when forming the resin coating layer, the coating resin layer integrally with the pin-shaped body at the same time, the
Extends between the rotor magnet and the mounting frame
, From the outer periphery of the stator to the mounting frame
It is formed so as to project in the horizontal direction, the wire end portion of the stator coil is fixed to this pin-shaped body, and the electric connection between the stator coil and the motor drive circuit is obtained through the fixed wire end portion. It has characteristics.

[0008]

According to this structure, since the pin-shaped body is integrally provided on a part of the resin coating layer formed on the surface of the iron core, when the stator coil is wound around the iron core, The wire end of the stator coil can be wound around and fixed to the pin-shaped body, which facilitates the wire end treatment. Further, since the wire end of the stator coil is fixed to the pin-shaped body formed on the stator even when the wire is connected to the relay printed circuit board, the relative position of the wire end and the printed circuit board can be easily regulated. The soldering work and the like can be mechanized.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of the main part, and FIG. 3 is an enlarged view of the main part.

1 to 3, the same components as those of the conventional example shown in FIGS. 6 and 7 are designated by the same reference numerals.

The difference between this embodiment and the conventional example will be described. In order to obtain insulation between the iron core 3 and the stator coil 6 that form the stator, when the resin coating layer 5 formed on the surface of the iron core 3 is formed, at the same time, the resin coating layer 5 is continuously and integrally pinned. the shaped body 5a, Rotamagune
Extending between the frame 1 mounted with the permanent magnet 13 as a Tsu bets
The stator 4 from the outer circumference of the salient pole
This pin-shaped body 5a is formed by projecting in a direction horizontal to the frame 1.
The wire end 6a of the stator coil is wound around and fixed to the stator coil 6 and the electric connection between the stator coil 6 and the motor drive circuit is obtained through the fixed wire end 6a.

That is, when the stator coil 6 is wound around the iron core 3, since the pin-shaped body 5a is formed continuously with the resin coating layer 5 formed on the preformed iron core 3. The wire end 6a of the stator coil 6 can be wound around and fixed to the pin-shaped body 5a, which facilitates the wire end treatment. Further, since the wire end 6a is fixed to the rigid pin-shaped body 5a integrated with the stator even when the wire end 6a is connected to the relay printed circuit board 15, as shown in FIG. The relative position between the 15 can be easily regulated, and the soldering work and the like can be mechanized .

Further, FIG . 4 shows that the outer peripheral portion 4a of the plurality of salient poles 4 of the iron core 3 is integrally formed with the resin coating layer 5 and the rust preventive coating layer 5b.
FIG. 6 is a partially cutaway perspective view of the object provided with, and FIG. 5 is an enlarged cross-sectional view of the relevant part. The anticorrosive coating layer can be applied to all the stators of the above-mentioned embodiments.

[0014]

As described above, according to the present invention, since the pin state is integrally provided in a part of the resin coating layer formed on the surface of the iron core, the stator coil is wound around the iron core. At this time, the wire end of the stator coil can be wound around and fixed to the pin-shaped body, which facilitates the wire end treatment. In addition, since the wire end of the stator coil is fixed to the stator when connecting to the printed circuit board for relaying, the relative position between the wire end and the printed circuit board can be easily regulated and the soldering work can be mechanized. Is something that can be done. Also, if necessary, it is possible to form an anticorrosion coating layer integrally with the insulating coating layer on the outer periphery of the salient poles of the iron core, so there is no need to provide the anticorrosion coating layer as a separate process. It will be.

[Brief description of drawings]

FIG. 1 is a sectional view of a magnetic disk drive device according to an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part of the embodiment.

FIG. 3 is an enlarged sectional view of a main part of the same embodiment.

FIG. 4 is a partially cutaway perspective view of another embodiment of the present invention.

FIG. 5 is an enlarged sectional view of an essential part of the embodiment.

FIG. 6 is a sectional view of a conventional magnetic disk drive device.

FIG. 7 is a perspective view of a main part of the conventional example.

[Explanation of symbols]

1 Mounting Frame 2 Fixed Shaft 3 Stator 4 Plural Stator Pole 4a of Stator Outer Part of Convex Pole 5 Resin Coating Layer 5a Pins 5b Rust Preventive Coating Layer 6 Stator Coil 6a Stator Coil Wire End 8 Through Hole 9 Coupling Part 10 Bearing 11 Magnetic disk 12 Rotor frame 13 Permanent magnet 14 Back plate 15 Printed circuit board

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Claims (2)

(57) [Claims] 1. A stator in which a stator coil is wound through an insulating layer formed by resin coating on each of the projecting poles of an iron core having a through hole formed in the center and having a plurality of projecting poles around the stator. , The shaft mounted on the mounting frame is fixed to the mounting frame so that the shaft is centered, and the shaft is mounted on the shaft.
Rotatably supports a rotor frame having a magnetic disk supported on the outer peripheral portion at one end thereof and faces the inside of the rotor frame with a predetermined distance from the salient pole of the stator .
The rotor magnet is fixed to so that, in a magnetic disk drive device to form a motor between its rotor magnet wherein the stator, winding the said rotor magnet
The outer circumference of the stator to extend between the attachment frame
Formed by projecting in the horizontal direction from the above-mentioned mounting frame
A pin-shaped body to be continuously formed integrally with the insulating layer
And a wire end of the stator coil is fixed to the pin-shaped body, and the stator coil and the motor drive circuit are electrically connected via the fixed wire end. apparatus. 2. An insulating layer formed by resin coating is formed also on the outer peripheral portions of the salient poles of the plurality of stators facing the rotor magnet, and the pin-shaped body is formed continuously on the insulating layer. The magnetic disk drive device according to claim 1.