JPS5839247A - Rotor for motor - Google Patents

Abstract

PURPOSE:To enable simple and sure connection of foil coils to terminals by a method wherein the end parts of the coils prepared by coiling foil wires are inserted into the slits of a commutator, crushed flat and soldered for connection. CONSTITUTION:When coils 1 prepared by coiling foil wires each having a rectangular section are connected to a commutator, the end parts of the coils 1 are inserted into slits which are formed beforehand in the terminals 3a of the commutator, respectively. Then, these end parts of the coils 1 are crushed by pressing the same from above and below, and then are soldered for connection.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a commutator having terminals provided with slits;
This relates to a motor rotor consisting of a coil wound with foil wire, and its purpose is to easily connect the foil wire to a terminal.

Traditionally, coil wires have often been round wires, and since round wires are easy to bend, it is easy to connect them to the commutator terminals. In order to increase the space factor of the coil, foil wire with a rectangular surface came to be used. However, since foil wire is difficult to bend, it cannot be wrapped around a terminal, making it difficult to connect to the terminal. be.

The present invention (1) has been made in view of the above background, and will be described below according to embodiments of a rotor in a flat motor shown in FIGS. 1 to 4.

In the figure, (1), (11, m are coils that are wound approximately in a bird's eye shape using foil wire with a rectangular cross section, each having a winding window (1a), and are arranged symmetrically about the center point at 120 degree intervals and adjacent to each other. The coil plate (2) is arranged in such a manner that the overall shape is a substantially square disk.(3) has three terminals (3a
), (3a), and (3a), the shaft (4) is press-fitted in the center and the terminal (3
a) It has one slit (5) in the radial direction. Then, overlap the foil wire ends of two adjacent coils (1) and simultaneously insert them into the slits (5) in a cross shape as shown in Figure 2, and temporarily hold the foil wire ends by crushing them as shown in Figure 3. This is done, and then soldering is done at that point to mechanically and electrically connect the wires.

Then, the terminals (3a) of the commutator (3) connected to the coil (1) are placed in the molding die (St) as shown in Fig. 4(a).
.

(S2) and the gate (G) of the molding die (Sl)
A molded resin material (6) is injected from the coil to generate fixing forces between each coil (1) and between each coil (1) and commutator (3). In addition, Goo 1- (Gl molding resin (6)
After injection, as shown in FIG.
) When the molded resin (6) layer formed by the molded resin (6) is pressed and cured, the molded resin (6) hardens with the molded resin (6) protruding as much as the gate fG1, and the thickness of the coil plate (2) is substantially reduced. This prevents the film from becoming thicker.

Although the rotor having such a configuration is not shown, its coil plate (2)
A flat motor is constituted which rotates with a shaft (4) supported by a bearing under the magnetic force of magnets disposed facing each other.

As described above, the rotor of the motor according to the present invention is characterized in that the ends of the foil wires are inserted into slits, crushed and soldered, and the foil wires are connected to the terminals. terminal wiring can now be done reliably and easily.

[Brief explanation of drawings]

Figures W11 to 4 show the rotor in a flat motor that is an embodiment of the present invention. Figure 1 is a perspective view of the rotor before soldering, and Figure 2 is an enlarged view of the main parts of the same. 3 and 3 are cross-sectional views showing the state in which the foil wire is crushed, and FIG. 4 is a cross-sectional view showing the state of rotor molding within the molding die. Special “r” Applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others) Arithmetic 1 Figure Hiroshi I4 Figure (a) (b)

Claims (1)

[Claims] l) Consisting of a commutator with a terminal provided with a slit and a coil made of a foil wire wound, the foil wire is connected to the terminal by inserting the end of the foil wire into the slit, crushing it, and attaching it to the terminal. A motor rotor characterized by: