JPH06141498A - Magnetic disc drive device - Google Patents

Abstract

PURPOSE:To provide a magnetic disc drive in which the wire processing of a wire end in the winding process of a stator coil and the soldering work between wire end of the stator coil and a printed board in assembling process are easy. CONSTITUTION:A the time of formation of the resin coating layer 5 which is made on the surface of an iron core 3 so as to get the insulation between the iron core 3 constituting the stator of a motor for driving a magnetic disc and a stator coil 6, a terminal pin 16 is planted at the same time at one part of the coating layer 5, and the stator coil 6 and a printed board for a motor driving circuit are connected through this terminal pin 16. By doing it this way, when winding a stator coil 6 around the iron core 3, the end of the wire can be wound and fixed to the terminal pin 16, and also at connection with the printed board 15, the position control can be made easy, so the soldering work, etc., can be automated.

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, and is characterized by a concrete structure that can easily and accurately connect a stator coil and a drive circuit of a motor and reduce assembly cost. is there.

[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. 8 shows a cross-sectional view of a conventional magnetic disk drive device. In FIG. 8, 1 is a mounting frame, and a fixed shaft 2 is press-fitted in the central portion thereof.
On the mounting frame 1, stator elements are arranged and fixed around the fixed shaft 2.

In this stator element, as shown in FIG. 9, a resin coating layer 5 for insulation is 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 The stator coil 6 is wound from above the coating layer 5.

Then, the through hole 8 provided at the center of the iron core 3 is engaged with the outside of an engaging projection 9 formed in the frame 1 extending linearly in parallel with the fixed shaft 2. Is fixed to the frame 1.

A rotor frame 12 having a magnetic disk 11 fixed to the outer periphery is rotatably supported at the free end of the fixed shaft 2 via a pair of bearings 10.
Further, a permanent magnet 13 serving as a cylindrical rotor magnet is fixed to the inside of the rotor frame 12 with a fixed distance from the salient pole 4 of the stator element via a back plate 14, and both of them are fixed. It constitutes a motor. In order to obtain the electrical continuity of the motor, the wire end 6a of the stator coil 6 is line-processed and soldered and fixed to the printed circuit board 15 for relay.

The above-mentioned linearly extending engaging projection 9
A portion 12 of the rotor frame 12 close to the inside of
a are opposed to each other, and the labyrinth effect of both of them abuts the bearing 10 substantially from the outside.

[0008]

However, in the above-mentioned conventional configuration, the wire end 6a of the stator coil 6 and the relay printed circuit board 15 in the wire treatment or the assembling process of the wire end 6a in the winding process of the stator coil 6 are carried out. However, there is a problem that the soldering work cannot be mechanized and the number of assembling steps increases. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a magnetic disk drive device that reduces the number of assembling steps and is price competitive.

[0009]

To achieve this object, a magnetic disk drive device 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. At the time of forming the resin coating layer, at the same time, terminal pins are planted in a part of the coating resin layer, and electrical connection between the stator coil and the motor drive circuit is obtained through the terminal pins.

[0010]

According to this structure, since the terminal pin is provided in 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 of the stator coil is wound. The end can be wound around the terminal pin and fixed, and the wire end treatment can be easily performed. Also, when connecting to a relay printed circuit board, the relative position of the two can be easily regulated by using the terminal pin, and the soldering work or the like can be mechanized.

[0011]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of the same main portion, and FIG. 3 is an enlarged sectional view of the same main portion. 1 to 3, the same components as those of the conventional example shown in FIGS. 8 and 9 are designated by the same reference numerals.

Explaining the difference between this embodiment and the conventional example, formation of a resin coating layer 5 formed on the surface of the iron core 3 in order to obtain insulation between the iron core 3 and the stator coil 6 which constitute the stator. At the same time, at the same time, the terminal pin 16 is planted in the pin holding portion 5a which is formed continuously and integrally with the coating resin layer 5.
The stator coil 6 is electrically connected to the motor drive circuit via the.

That is, since the terminal pin 16 is provided in the pin holding portion 5a formed continuously with the resin coating layer 5 formed on the iron core 3, the stator coil 6 is wound around the iron core 3. When the stator coil 6
The wire end 6a can be wound around the terminal pin 16 and fixed, which facilitates the wire end treatment. Also, when connecting to the printed circuit board 15 for relay, the position can be easily regulated by using the terminal pin 16, and the soldering work and the like can be mechanized. In the above embodiment, the terminal pin 16 is used as the relay printed circuit board 1
5 shows the case in which it is configured to extend in the vertical direction, but it may be configured to extend in parallel to the relay printed circuit board 15 as shown in FIG.

(Embodiment 2) FIG. 5 is a sectional view of another embodiment of the present invention, FIG. 6 is a perspective view of the essential portion, and FIG. 7 is an enlarged sectional view of the essential portion. 5 to 7, the same components as those of the embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals.

Explaining the difference between this embodiment and the previous embodiment, a resin coating layer 5 formed on the surface of the iron core 3 in order to obtain insulation between the iron core 3 and the stator coil 6 which constitute the stator. At the time of forming, the terminal pin 16 is planted in the pin holding portion 5a continuously formed on the coating resin layer 5 at the same time, and the stator coil 6 and the motor drive circuit are electrically connected through the terminal pin 16. In this embodiment, the coating resin layer 5 is formed inside the through hole 8 of the iron core 3, and this portion 5a and the portion 12a of the rotor frame 12 are the same. A gap is formed between and to obtain a labyrinth effect.

According to this structure, it is not necessary to form the protrusion 9 having a predetermined length on the mounting frame in order to obtain the labyrinth effect as in the first embodiment and the conventional example. This means that in order to make the device more compact, especially in order to reduce the radial size,
It is also necessary to reduce the thickness of the protrusions 9, and forming such a thin protrusion on a mounting frame made of metal has poor workability. However, according to this embodiment, resin molding is performed. This is easy because it is configured.

[0017]

As described above, according to the present invention, since the terminal pin is provided in 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. Since the wire end of the stator coil can be wound around the terminal pin and fixed, the wire end treatment becomes easy. Also, when connecting to a printed circuit board for relay, by using the terminal pin, the position can be easily regulated and the soldering work can be mechanized.

[Brief description of drawings]

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

FIG. 5 is a sectional view of a magnetic disk drive according to still another embodiment of the present invention.

FIG. 6 is a perspective view of an essential part of the embodiment.

FIG. 7 is an enlarged cross-sectional view of a main part of the same embodiment.

FIG. 8 is a sectional view of a conventional magnetic disk drive device.

FIG. 9 is a perspective view of a main part of the conventional example.

[Explanation of symbols]

 1 Mounting Frame 2 Fixed Shaft 3 Iron Core 4 Convex Pole 5 Coating Resin Layer 5a Pin Holding Part 6 Stator Coil 6a Coil Wire End 8 Engagement Hole 9 Engaging Protrusion 11 Magnetic Disk 12 Rotor Frame 13 Rotor Magnet 15 Printed Board 16 Terminal Pin

Claims (2)

[Claims] 1. A mounting frame for mounting a stator element in which a stator coil is wound through an insulating layer on each of the salient poles of an iron core having a through hole formed in the center and a plurality of salient poles formed on the periphery thereof. Is fixed to the mounting frame so that the fixed shaft fixed to the center of the fixed shaft is rotatably supported on the free end of the fixed shaft. In a magnetic disk drive device, a cylindrical rotor magnet is fixed so as to face a salient pole of the stator element with a predetermined gap, and a motor is formed between the rotor magnet and the stator element. The layer is formed by resin coating, and the terminal pin is planted in the pin holding portion which is integrally formed continuously with the insulating layer,
The magnetic disk drive device is characterized in that a wire end of the stator coil is fixed to the terminal pin, and an electrical connection with a drive circuit of the motor is obtained through the terminal pin. 2. A coating layer is formed continuously with the insulating layer even inside the through hole, and a gap is formed between the coating layer and a part of the rotor frame to obtain a labyrinth effect. The magnetic disk drive device according to claim 1.