JPH05176485A - Thin type core motor - Google Patents

Abstract

PURPOSE:To form multi-layered coils orderly and regularily by a method wherein the coil winding sections of a core are provided with projections while coils are wound between the projections. CONSTITUTION:A core 22 is provided with a plurality of projections 26 while coils 30 are formed between these projections 26. The projections 26 are preferably projected into the lateral direction with respect to the coil winding sections of the core 22 which are extended radially or circumferentially. The projections 26 can be formed integrally with the core 22 or can be formed by mounting members, constituting the projections, on the core 22 while the height thereof can be set in accordance with the height of the layer of the coil 30. The projections 26 can be provided symmetrically at both sides of the core 22 by a proper number. The coils 30 are formed on the straight parts of the core 22 between the projections 26. According to this method, the coils 30 consisting of multi-layered windings are formed orderly and regularily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin iron core motor suitable for use in, for example, driving a floppy disk spindle.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional example of a thin iron core motor. Such a thin iron core motor has a rotor portion 10 disposed at a central portion and rotatable around an axis and a periphery of the rotor portion 10. It is composed of a base plate (not shown) and a stator part 20 mounted on a stator holder.

The rotor portion 10 includes a shaft 14, a magnet 12 circumferentially arranged at a peripheral portion, and a yoke 16 which supports the magnet 12 with respect to the shaft 14, and may be supported by a thrust bearing (not shown). ..

The stator portion 20 has a radially outer peripheral edge portion and a plurality of winding portions 28 extending inward in the radial direction from the peripheral edge portion, and the peripheral edge portion is provided on a substrate and a stator holder (not shown). The stator portion 20 is supported by being mounted.

As shown in FIG. 3, the stator portion 20 has an iron core 22 made of, for example, a thin silicon steel plate, and a coil 30 formed on a winding portion 28 of the iron core 22.
An insulating material 24 for electrically insulating the coil 30 from the iron core 22 is mounted on both surfaces of the.

An inner end portion extending in the axial direction is formed at the inner end of the iron core 22 in the radial direction, and the inner end portion of the magnet 12 receives the magnetic flux from the magnet 12 of the rotor portion 10. And may have the same axial width as the magnet 12.

The iron core 22 may be formed by sticking two steel plates together. The outer end portion of the iron core 22 is attached to the substrate and the stator holder via a spacer (not shown), so that the stator portion 20 is supported with respect to the substrate and the stator holder.

[0008]

The coil 30 has an iron core 22.
It is preferable that the wire rods that are formed in the winding portion 28 of the coil 30 and that form the coil 30 are aligned in an orderly manner in alignment with the wire rods adjacent to each other.

However, the iron core 22 has a thickness of, for example, 0.
It is constructed by laminating 5 mm silicon steel plates, and it is difficult to orderly wire the iron core 22 with the wire. Due to the manufacturing error of the winding portion 28 of the iron core 22, the variation in the thickness of the wire rod, and the operation error of the winding machine for forming the coil 30, the winding that is not matched with the formed coil 30 is wound. May occur.

Further, when the coil 30 is wound in multiple layers as shown in FIG. 3B, not only the wire rods adjacent to each other and the wire rods are arranged in an orderly manner, but also the wire rods in the lower layer and the upper layer. It is preferable that the wires of the layers are arranged in an orderly manner with each other, but it is difficult to form the coil 30 composed of such multiple layers in an orderly manner.

In view of the above point, the present invention has an object to provide a thin iron core motor having a coil 30 wound in an orderly and regular manner.

[0012]

According to the present invention, in the thin iron core motor, the winding portion 28 of the iron core 22 has the protrusions 26, and the coil 30 is provided between the protrusions 26. It is configured to be wound.

[0013]

According to the present invention, since the winding portion 28 of the iron core 22 of the thin iron core motor has the protrusions 26 and the coil 30 is wound between the protrusions 26, the coil 30 is formed. The wire is wound in an orderly and regular manner.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the thin iron core motor of the present invention will be described below with reference to FIG. 2 to 2 in FIG.
Parts corresponding to those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows details of a winding portion 28 of a thin iron core motor according to this embodiment. The stator portion 20 has an iron core 22 whose both sides are covered with an insulating material 24 and an outside of the iron core 22. And a coil 30 formed on the. The iron core 22 is
For example, it may be formed by stacking silicon steel plates having a thickness of 0.5 mm.

The iron core 22 has a plurality of protrusions 26,
A coil 30 is formed between the protrusions 26. Protrusion 2
6 preferably projects laterally or circumferentially with respect to the winding portion 28 of the radially extending iron core 22.

The protrusion 26 may be formed integrally with the iron core 22 or may be formed by mounting the member forming the protrusion 26 on the iron core 22, the height of which is equal to the height of the layers of the coil 30. It may be set correspondingly.

An appropriate number of protrusions 26 may be symmetrically provided on both sides of the iron core 22, and the straight iron core 2 between the protrusions 26 may be provided.
The coil 30 is formed in the two portions.

As is apparent from a comparison between the conventional example shown in FIG. 3 and the present example shown in FIG. 1, according to the present example, the coil 30 formed in one winding portion 28 is formed by the protrusions 26 into several coils. It is divided into small coils 30. Since each small coil can be easily wound in an aligned manner, the manufacturing process can be made more efficient than when a large coil is wound in an aligned manner as in the conventional example.

Although the embodiments of the present invention have been described in detail above, those skilled in the art will understand that the present invention is not limited to the above-mentioned embodiments and various other configurations can be adopted without departing from the gist of the present invention. Easy to understand.

For example, the present invention may be applied not only when the stator portion 20 shown in FIG. 2 includes the winding portion 28 but also when the rotor portion 10 includes the winding portion 28.

[0022]

According to the present invention, the coil 30 formed on the winding portion 28 of the thin iron core motor can be formed by orderly and regular winding, and the manufacturing process of the coil 30 is simplified. And is streamlined.

According to the present invention, complete alignment winding can be performed even when the coil 30 formed in the winding portion 28 of the thin iron core motor is a multi-layer winding.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a thin iron core motor of the present invention.

FIG. 2 is a diagram showing an example of a thin iron core motor.

FIG. 3 is a diagram showing an example of a conventional thin iron core motor.

[Explanation of symbols]

 10 Rotor Part 12 Magnet 14 Shaft 16 Yoke 20 Stator Part 22 Iron Core 24 Insulating Material 26 Protrusion 28 Winding Part 30 Coil

Claims (1)

[Claims] 1. A thin iron core motor, wherein a winding portion of an iron core is provided with a protrusion, and a coil is wound between the protrusions.