JPS6241585Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of a thin plate-like coil plate formed by arranging a plurality of coils of each pole adjacent to each other without using a winding iron core, and a shaft fixed through the center of the coil plate. This invention relates to a flat motor whose main components are a rotor and magnets arranged opposite to each other on the plane of the coil plate, and its purpose is to keep the rotation of the rotor constant.

Although such a flat motor is thin, the rotor has a small mass, so it has the disadvantage that the number of revolutions easily changes due to changes in load.

This invention was created in view of these drawbacks.
The aim is to provide a motor with small rotational speed fluctuations while maintaining a thin profile. Figures 1 and 2 below
Embodiments will be described according to the drawings shown in the figures.

In the figure, 1, 1, 1 are coils that are wound approximately in an elliptical shape and each has a winding window 1a, and are arranged symmetrically about the center point at 120 degree intervals and adjacent to each other, and have an approximately thin circular shape as a whole. A coil plate 2 having a shape is formed. Reference numeral 3 denotes a shaft, which is fixed through a resin material 4 buried in a central space formed between the coils 1.
(Other reinforcing bushes may be interposed.)
Reference numeral 5 denotes a three-segment cylindrical commutator, which is press-fitted and fixed onto the shaft 3, and its commutator terminal portion is connected to the coil 1. Reference numerals 6 and 6 denote governors connected in series to the coil 1, and are composed of, for example, a contact plate having a fixed base and a contact point at the tip, and a conductive wire plate spring having a fixed base and a weight at the tip. A weight is disposed within the winding window 1a of the coil plate 2 so as to face toward the outer circumference of the coil plate 2. A ring-shaped flywheel 7 has an outer diameter approximately equal to the outer diameter of the coil plate 2, and is attached to the periphery of the coil plate 2. With the above configuration, rotor A is completed. B and B are substantially semicircular magnets fixed to the yoke plate C, and are arranged so as to be housed in the ring-shaped flywheel 7, respectively. D is a cylindrical case, and the yoke plate C is attached to close the opening. E and E are fixed at their bases to yoke plate C,
This is a brush whose free end slides into contact with the commutator 5, and is arranged in the space between the pair of magnets B. F and F are bearings attached to the yoke plate C and the case D, respectively, and support the shaft 3 of the rotor A.

In a flat motor with such a configuration, the magnetism generated from magnet B is transferred from the coil of rotor A to case D.
A closed magnetic path is formed via →yoke plate C→magnet B. Also, when rotor A rotates at low speed,
The contact point of the governor contacts the tip of the conductive wire plate spring to turn on the coil 1, and the rotational energy is stored in the flywheel 7, and when the rotor A becomes too high speed, the centrifugal force acting on the weight of the governor 6 causes conduction. The coil 1 is turned off by bending the wire plate spring to separate the tip of the conductive wire plate spring from the contact point, and the flywheel 7 continues to rotate with the energy of the flywheel 7, so that a constant rotor rotation speed can be obtained.

As described above, in the rotor of the flat motor of the present invention, a ring-shaped flywheel is attached to the periphery of the coil plate, a magnet is arranged within the flywheel, and a governor for controlling the rotor rotational speed is placed within the winding window of the coil. The governor is located in the winding window of the coil, which has a low contribution to the generation of drive torque of the rotor, so there is no problem with torque generation and the motor can be kept thin. Since the flywheel is provided so as to surround the outside of the magnet, it is possible to maintain the thin profile of the motor and provide a flat motor with little variation in rotational speed.

[Brief explanation of the drawing]

1 and 2 show a flat motor according to an embodiment of the present invention, with FIG. 1 being an exploded perspective view of the main parts, and FIG. 2 being a sectional view of the motor taken along cutting line AA.

Claims (1)

[Scope of utility model registration request] A rotor is formed by arranging multiple coils of each pole adjacent to each other without intervening a winding iron core to form a thin disc-shaped coil plate, and a shaft is fixed through the center of the rotor, and the rotor faces the plane of the coil plate. In a flat motor whose main component is a magnet, a ring-shaped flywheel is attached to the periphery of a coil plate, and the magnet is housed within the flywheel, and a governor for controlling the rotor rotational speed is attached to the winding of the coil. A flat motor characterized by being housed inside a window.