JPS61262060A - Flat motor - Google Patents

Abstract

PURPOSE:To facilitate the preparation of a device and enhance the precision and heat resistance, by organizing a main retaining disc body for rotor coils with a ceramic calcined member, and by forming armature coils to be fixed on the member. CONSTITUTION:A pole 10 made of doughnut-shaped ferritic permanent magnet substance is fitted on the inner peripheral surface of a frame 8 with epoxy resin bonding agent or the like. A disc 14 is organized with calcined soft ferritic magnetic powder, and on the wall surface, the armature coils 15 of printed coils are fixed. Otherwise, so far as the component of the disc 14 is concerned, a normal ceramic disk is acceptable, and so far as the printed coils are concerned, the upper and lower coils 15a, 15b may be connected to through-hole plating 19 formed on the disc 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The invention relates to improvement of heat resistance and magnetic properties of a flat motor.

[Conventional technology]

Conventionally, as this type of product, there have been published Utility Model Application No. 58-108769, Utility Model Application No. 58-124081, and Utility Model Application No. 58-1249.
No. 18 or Japanese Unexamined Patent Publication No. 58-8408. Here, the method disclosed in Japanese Utility Model Application Publication No. 58-145085 is shown in FIGS. 3 and 4, and will be summarized and explained. In the figure, 1 is the rotor of a small electric motor, 2 is its rotating shaft,
3 is a permanent magnet placed oppositely on the plate surface of the rotor 1;
4 is a brush, 5 is a commutator, and 6 is a coil. Note that the rotor 1 is made of an amorphous non-crystalline alloy magnetic material, thereby improving the magnetic properties, heat resistance, etc. of the device.

[Problem that the invention seeks to solve]

Although the rotor of a conventional flat motor is constructed as described above, there are problems such as the manufacturing of the device being complicated and expensive.

This invention was made to solve the above-mentioned problems, and aims to provide a flat motor that is easy to manufacture and has high characteristics and reliability.

[Means for solving problems]

In the flat motor according to the present invention, a disk serving as a mechanical strength member of the rotor is made of fired ceramic material, and a printed coil is fixed on the surface of the disk.

[Effect]

In the rotor of the flat motor according to the present invention, the rotary disk, which is a mechanical structural material, is easy to manufacture, has high heat resistance, can reduce magnetic circuit resistance, and improves the characteristics of the device.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 7 is a flat motor, 8° 9 is a frame made of pressed material of a mild steel plate, and a donut-shaped pole 10 made of a ferrite permanent magnet is attached to the inner peripheral surface of the frame 8 with an epoxy resin adhesive or the like. It is attached by.

11 is a flat rotor, 12 is a shaft rotatably supported by the frames 8 and 9 via bearings 13, and 14 is a disc made of fired soft ferrite magnetic powder; An armature coil 15 made of a printed coil is fixed to the board surface. The above-mentioned printed coil is formed by a method similar to that used for printed circuit boards used in electronic circuit devices (etching method), and a segment 17 on which a brush 16 is slidably contacted is attached to the center portion.
Its surface is plated (gold plating, chain plating, chrome plating, etc.). Reference numeral 18 denotes a boss made of a thermosetting synthetic resin molding material that molds and fixes the disk 14 onto the shaft 12.

According to the above configuration, the magnetic flux of the pole lO flows to the disk 14, the magnetic resistance is reduced, and the device characteristics are improved. Note that the magnetic flux of the pole 10 also flows to the frame 9,
Magnetic saturation of the disk 14 is suppressed.

Further, the constituent members of the disk 14 may be ordinary ceramic (fine ceramics) disks, and the printed coil is formed by providing through-hole plating 19 on the disk 14 as shown in FIG. 15b may be connected.

〔Effect of the invention〕

As described above, according to the present invention, the main body of the holding disk of the rotor of the flat motor is made of fired ceramics, and the armature coil is fixed to this, which facilitates manufacturing of the device and improves accuracy and It has the effect of being able to obtain a product that has high heat resistance and can reduce magnetic circuit resistance at a low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is an enlarged sectional view of main parts of a rotor according to another embodiment of the invention, FIG. 3 is a schematic configuration diagram of a conventional small electric motor, and FIG. FIG. 4 is a perspective view of the main components of FIG. 3. In the figure, 8.9 is a frame, 10 is a pole, II is a rotor, 12 is a shaft, 14 is a disk, 15, and 15&, 1
5b1.121m child coil, 19 is through hole plating. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) A flat motor having a rotor in which a rotor coil is wound around a disk, characterized in that the main body of the holding disk of the rotor coil is made of a fired ceramic member. (2) A flat motor according to claim 1, wherein printed coils are wired on a disk by an etching method. (3) The flat motor according to claim 1 or 2, wherein the fired ceramic member is made of a fired material of ferrite magnetic powder. (4) Claim 1, in which through-hole plating is provided on a disc and upper and lower coils wired on both sides of the disc are connected.
The flat motor according to any one of items 1 to 3.