JPS6346664B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor structure for a flat motor.

Due to the unique shape of the rotor of a conventional flat motor, and to avoid damaging the outer circumferential surface of the coil wire, the position of the rotor of a conventional flat motor is controlled using a jig, etc., rather than regulating the position between the parts. There was a lot to do.

For example, as shown in Fig. 1, a pin hole is protruded from the top surface of the jig A, and the jig is used to determine and regulate the position of the commutator in the rotational direction while inserting it into the shaft penetrating part at the center of the coil A. After mutual positioning in the axial direction, the wires were connected and simultaneously molded with a resin such as nylon, so that the coil, commutator, and shaft were solidified into one body.

However, in this conventional method, a slight angular error or wobbling between the jigs 1 and 2 results in a large angular misalignment between the coil and the commutator, resulting in large variations in the commutation angle. This has caused large variations in motor characteristics such as rotational speed, current, and torque, and has also had an adverse effect on noise, brush life, etc.

In addition, the coils and commutators must be assembled after being positioned in a jig, and if the assembly is completely manual, it takes time to assemble, resulting in poor productivity.

In view of these conventional points, the flat motor rotor of the present invention is intended to improve the drawbacks thereof.

It is an object of the present invention to provide a method for positioning a coil in a motor.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 2 is a partially cutaway sectional view of an embodiment of the rotor of the flat motor of the present invention, Fig. 3 is an exploded perspective view of the parts, and Figs. 4 and 5 are perspective views of the coil after pressurization. , FIG. 6 is a perspective view showing the pressurized state of the coil.

In the figure, 1 is a thin plate-shaped case with an opening on one side, 2 is a bearing stand buried in the center of the bottom of the case, and 3
4 is a self-aligning bearing, 4 is a yoke, and 5 is a terminal block having magnetic plate stoppers 5a, 5a protruding from both upper and lower ends.
6 is an opposing bearing, 7 is a terminal plate, and 8 is a brush. Further, numeral 9 indicates a substantially semicircular plate-shaped magnet, and both of the magnets are of the same shape. 10 is a rotor, 10a is a shaft, and 10b is a commutator. 10c is a coil formed in an annular shape, and is housed in a recess 11a in the molding table 11, and is inserted into the punch 1.
Press with 2. Both the recess 11a and the punch 12 have the same fan shape.

Thus, both the recess 11a and the punch 12 have a protrusion 10d formed at their apex. Here, each coil is wound with a specified number of turns, pressurized and heated with a punch 12 to form the coil, cooled and temporarily fixed with a self-fusing agent (alcohol), and removed from the molding table 11 so as not to come apart.

Furthermore, the same number of positioning recesses 13a as the number of coils are formed on the outer peripheral surface of the commutator 13 at equal intervals.

Therefore, in order to configure these plurality of coil rings 10c as a rotor, as shown in FIG. Arrange at equal intervals.

After it is placed, it is molded using resin using a circular molding machine.

As described above, the rotor of the flat motor of the present invention is constructed by housing an annular coil in a substantially fan-shaped recess of a molding table, pressing and heating the top surface of the coil with a die, and temporarily fixing it with a self-fusing agent. to form a substantially fan-shaped coil ring having a convex portion at the apex, and the convex portion is fitted into a correspondingly formed concave portion on the outer circumferential surface of the commutator to form a plurality of coil rings around the outer circumferential surface of the commutator. Since they are arranged close to each other at equal intervals, the relative positioning of the commutator and the coil ring can be easily performed, and the assembly can be performed accurately.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the rotor of a conventional motor, Fig. 2 is a sectional view of a motor of an embodiment of the rotor of the flat motor of the present invention, Fig. 3 is an exploded perspective view of parts, and Fig. 4. , FIG. 5 is a perspective view of the coil after being pressurized, FIG. 6 is a perspective view of the coil being compressed and molded on a molding table, and FIG. 7 is a perspective view of the rotor constructed from a plurality of coils. . 1... Case, 2... Bearing stand, 3... Self-aligning bearing, 4... Yoke, 5... Terminal block, 5a... Temporary magnet piece, 6... Opposed bearing, 7... Terminal plate, 8...
...Brush, 9...Magnet, 10...Rotor, 10a...
...shaft, 10b... commutator, 10c... coil ring,
11... Molding table, 11a... Recess, 12... Punch, 13... Commutator.

Claims (1)

[Claims] 1. A circular coil is housed in a substantially fan-shaped concave portion of a molding table, and the upper surface of the coil is pressed and heated with a die and temporarily fixed with a self-fusing agent to form a substantially fan-shaped coil ring having a convex portion at the apex. A plurality of coil rings are disposed at equal intervals near the outer circumference of the commutator by fitting the convex portion into a correspondingly formed concave portion on the outer circumferential surface of the commutator. rotor of a flat motor.