Tokyo Parts Industrial Co., Ltd.

Akihisa Inoue

Tadao Yamaguchi

Naohisa Koyanagi

For the purpose of preventing resin from flowing into a commutator when resin molding a rotor, a rotor for a flat coreless motor comprises a printed wiring board, on one side of which a plurality of air-cored armature coils are provided, and on the other side of which a plurality of segment patterns constituting a commutator and a wiring pattern are provided. These members are molded with resin into a unitary body with the segment patterns exposed. Wiring pattern parts are provided so as to surround the outer periphery of the commutator.

Flat rotor and motor comprising the same

A brushless motor having a transfer device includes a rotor in which a resin transfer device is disposed at one side of a rotor case, and a magnet is disposed at the other side of the case, a support portion integral with the rotor case to prevent the resin transfer device from being separated in an axial direction and sliding in a rotational direction, a shaft supporting the rotor, a stator base where a shaft holder for supporting the shaft is disposed, and a stator having armature coils for driving the rotor. Thus, the transfer device is prevented from being separated and strength in a rotational direction can be secured by the support portion. Also, the cost and the number of installation steps is reduced.

Brushless motor having transfer device

A brushless motor having a resin bearing including a rotor with an integral output device at one side of a rotor case and a magnet at the other side, a shaft supporting the rotor, a resin bearing supporting the shaft for rotating, a stator base incorporating the resin bearing, a stator for driving the rotor, and an oil containing portion in the resin bearing. The oil containing portion includes grooves, a concave portion, and an oil barrier device located at the resin bearing, so the number of parts as well as the cost is reduced and a simple structure prevents the oil from leaking.

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Isesaki, Japan

Akihisa Inoue