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Rotor having printed wiring commutator member and flat motor having the rotor
| Details |
Inventors: Yamaguchi, Tadao;
Assignee: Tokyo Parts Industrial Co., Ltd. (Isesaki, JP)
Primary Examiner: Waks; Joseph
Assistant Examiner:
Attorney, Agent or Firm: Bushnell, Esq.; Robert E.
In a rotor having a printed wiring commutator member as a printed wiring board in which a shaft installation hole is installed at the center of a printed wiring board, at least six segment patterns separated by slits are formed around the shaft installation hole, and simultaneously, at least three conductive bodies connect every two other segment patterns, terminal connection patterns are arranged at the outer circumference of the printed wiring board, a printed wiring commutator member is formed, not by through hole plating, as a means for forming the at least three conductive bodies for connecting every two other segment patterns, a plurality of air-core armature coils are installed at the side opposite to the segment patterns, and terminals of the air-core armature coils are connected to the terminal connection patterns through notches arranged at the outer circumference. |
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DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide an improved rotor.
It is another object to provide a rotor bearing a plurality of segments of a pattern formed on a printed wiring commutator member that are electrically coupled together without plated through holes.
It is still another object to a rotor bearing a plurality of electrically connected segments of a pattern that is amenable to lower production costs.
To achieve these and other objects, there is provided a rotor having a printed wiring commutator formed on a printed wiring board that has a shaft installation hole located at the center of a printed wiring board.
At least six segment patterns electrically separated by slits are formed around the shaft installation hole, and simultaneously, at least three electrical conductors connect every two segment patterns.
Terminal connection patterns are arranged at the outer circumference of the printed wiring board, and a printed wiring commutator member is formed, not by through hole plating, to provide at least three of the electrical conductors in order to connect pairs of the segmented patterns.
A plurality of air-core armature coils are installed on the side of the wiring board opposite to the segmented patterns, and terminals of the air-core armature coils are connected to the terminal connection patterns through notches disposed along the outer circumference.
It is preferred in embodiments of the present invention that at least one of the three electrical conductors be formed as a terminal of the air-core armature coil.
Also, it is preferred that part of a spark quenching printed resistor be located at part of the conductive body configured as the terminal to cover the conductive body.
Additionally, it is preferred that a plurality of resin passing holes be installed at the outer circumference of any array of the segmented patterns.
A flat motor having a rotor with this structure and a printed wiring commutator is provided wherein vibrations are generated during rotation by constructing the rotor to be non-circular and the motor to be formed of a magnet disposed to face the rotor via an axial gap and a housing accommodates the rotor and magnet, or alternatively a flat motor is constructed to use this rotor with a printed wiring commutator wherein the rotor is formed to be circular and the motor is formed of a magnet disposed to face the rotor via an axial gap, and a housing accommodates the rotor and magnet
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