JPH05282777A - Stator for motor - Google Patents

Abstract

PURPOSE:To enable soldering with laser light by making the surface of an insulator of the stator almost white color. CONSTITUTION:The insulator 2 integrally formed with a stator core for the purpose of its insulation and press-fitted with a connecting pin 4 for the purpose of connecting a winding 3 to a printed board is made to be almost white color at least on its surface. By this method, since the laser light to be used for soldering with the printed board can be reflected, the insulator 2 can be prevented from melting due to the laser light, and the soldering 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 stator such as a spindle motor used in a floppy disk device or the like.

[0002]

2. Description of the Related Art Conventionally, in this type of stator, the connecting pins of the winding and the printed circuit board are connected by soldering with a soldering iron. Since the heat from the soldering iron is mainly transferred to the connecting pins, the printed circuit board and the solder, the insulator of the stator is filled with carbon or glass and is a brown or black material with high heat resistance. Was used.

[0003]

However, in the above-mentioned conventional stator, a brown or black material is used as an insulator in order to secure heat resistance during soldering work. Therefore, a laser is used instead of a soldering iron. When attempting to automate the soldering work by irradiating heat with light, there is a problem that soldering with laser light cannot be performed because the insulator absorbs laser light and melts.

SUMMARY OF THE INVENTION The present invention is intended to solve such a conventional problem, and an object thereof is to provide an excellent motor stator capable of automatically soldering a connecting pin and a printed circuit board using a laser beam. It is a thing.

[0005]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a connection for connecting a winding to a printed circuit board integrally formed with a stator core to insulate the winding from the stator. An insulator having a pin press-fitted therein is provided, and at least the surface of the insulator is substantially white.

[0006]

Therefore, according to the present invention, by making the insulator of the stator substantially white, it becomes difficult to absorb the laser light even when it is irradiated, and the heat generation of the insulator can be suppressed to a low level. Enables automation of soldering. Further, by using the laser beam, it is possible to solve the problems such as soldering to a narrow space, which cannot be connected by the conventional soldering iron, and the soldering iron coming into contact with the insulator and melting.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram for explaining a soldering work in an embodiment of the present invention. FIG. 2 is a plan view showing the overall structure of the stator in one embodiment of the present invention, and FIG. 3 is a perspective view of the main parts thereof. First, in FIG. 2 and FIG.
Reference numeral 1 denotes a stator core, in which one or a plurality of magnetic materials such as iron and silicon steel plates are laminated, and a magnetic flux generated from facing magnets (not shown) passes through to form a magnetic circuit. Reference numeral 2 is an insulator that has a substantially white surface including white that can reflect laser light, and is integrally formed with the stator core 1 by an insulating material for preventing a short circuit.
The insulator 2 has a white surface by mixing a white pigment with a molding material at the time of molding or by applying a white paint after molding. Reference numeral 3 denotes a winding, which is wound around the stator core 1 via an insulator 2 which is an insulating material. Reference numeral 4 denotes a connecting pin for connecting a soldering land of a printed circuit board (not shown) and the winding wire 3, which is embedded in a part of the insulator 2 by press fitting to expose an end 4a to be soldered. ing. On the other hand, the end 3a of the winding 3
Is wound around the raised end of the connecting pin 4. A current is supplied to the winding 3 by an electric circuit formed on a printed circuit board (not shown), and the stator core 1
A rotating torque is generated between the magnetic flux passing through and according to Fleming's left-hand rule.

FIG. 1 is a conceptual view of soldering with a laser beam using the stator in the above embodiment. Laser light 5 generated from an external laser light generator (not shown) passes through an optical fiber 6 called a light guide and irradiates the solder 7 applied on the end 4a of the connecting pin. As the laser light 5, YAG laser light having a wavelength of approximately 1.06 μm is used. The solder 7 irradiated with the laser light 5 rises in temperature and melts, and the end 4a of the connecting pin 4a.
And the land of the printed circuit board are soldered.

Reflected laser light 5 reflected from the soldering point
Although a is applied to the insulator 2, the surface of the insulator 2 is almost white, so that it is almost not reflected and absorbed, and therefore, the temperature rise of the insulator 2 is suppressed, so that it does not melt. When the irradiation of the laser beam 5 is completed, the soldering place is cooled and the soldering is completed.

[0010]

According to the present invention, as is apparent from the above-mentioned embodiment, at least the surface of the insulator of the stator is made almost white and the absorption of laser light is reduced, so that automatic soldering by laser light becomes possible. This has the effect that the attaching process can be automated.

Further, according to the present invention, it is possible to prevent the melting of the insulator due to the contact of the soldering iron, which contributes to the quality improvement and, finally, it is also useful for reducing the product cost of the floppy disk device and the like. Have an effect.

Furthermore, since it is possible to solder with a laser beam even in a narrow place where a conventional soldering iron cannot be used, there is an effect that the miniaturization of the device can be easily realized.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of laser light soldering of a stator according to an embodiment of the present invention.

FIG. 2 is a plan view showing the overall structure of a stator according to an embodiment of the present invention.

FIG. 3 is a perspective view of a main part of the stator.

[Explanation of symbols] 1 stator core 2 insulator 3 winding 3a winding end 4 connection pin 4a connection pin end 5 laser light 5a reflected laser light 6 optical fiber 7 solder

Claims (1)

[Claims] 1. An insulator is integrally molded with the stator core to insulate the winding from the stator core and has a connecting pin press-fitted therein for connecting the winding to a printed circuit board. At least a surface of the insulator is provided. Motor stator with almost white color.