| 摘要 |
PURPOSE:To reduce the thickness of a coreless motor by forming the upper surface of a coil flatly, disposing a permanent magnet except the cylinder of the coil and the central projection, and further disposing a commutator or the like in a space produced due to the thickness of the magnet. CONSTITUTION:A rotor is composed of a coil 1, a commutator 2 and a rotor shaft 3. The upper surface of the coil 1 is formed flatly to the center, and disposed to the vicinity of a case 4. Permanent magnets 8, 9 are disposed except a cylinder 1b and a central projection 1c. Accordingly, the size between the flat part of the case 4 and a case cover 5 can be reduced. The commutator 2 and brushes 10, 11 are disposed in the space formed at the center produced due to the thickness of the magnets 8, 9. |
