Commutator and electric rotary device having the same

A commutator,

• comprising:
• a plurality of commutating pieces having outer faces;
• and
• a plurality of sliding members being fixed on the outer faces of said commutating pieces, said sliding members including carbon nano tubes whose outermost layers have electric conductivity.

A commutator,

• comprising:
• a plurality of commutating pieces having outer faces;
• and
• a plurality of combined sliding sections being fixed on the outerface of said commutating pieces, each of said combined sliding section including a first sliding member and a second sliding member,
• wherein the first sliding members include carbon nano fibers whose outermost layers have electric conductivity, and
• the second sliding members include no carbon nano fibers, the second sliding members are respectively integrated with the first sliding members, the second sliding members are fixed on the outer faces of said commutating pieces.

A commutator,

• comprising:
• a plurality of commutating pieces having outer faces;
• and
• a plurality of combined sliding sections being fixed on the outerface of said commutating pieces, each of said combined sliding section including a first sliding member and a second sliding member,
• wherein the first sliding members include carbon nano tubes whose outermost layers have electric conductivity, and
• the second sliding members include no carbon nano tubes, the second sliding members are respectively integrated with the first sliding members, the second sliding members are fixed on the outer faces of said commutating pieces.

A commutator,

• comprising:
• a plurality of commutating pieces including electric conductive parts, which have sliding faces on which a brush slides;
• and
• a plurality of sliding members including an electric conductive metal and carbon nano fibers whose outermost layers have electric conductivity, said sliding members being fixed on the sliding faces of the electric conductive parts.

A commutator,

• comprising:
• a plurality of commutating pieces including electric conductive parts, which have sliding faces on which a brush slides;
• and
• a plurality of sliding members including an electric conductive metal and carbon nano tubes whose outermost layers have electric conductivity, said sliding members being fixed on the sliding faces of the electric conductive parts.

An electric rotary device,

• having a commutator, which comprises:
• a plurality of commutating pieces having outer faces;
• and
• a plurality of sliding members being fixed on the outer faces of said commutating pieces, said sliding members including carbon nano fibers whose outermost layers have electric conductivity.

An electric rotary device,

• having a commutator, which comprises:
• a plurality of commutating pieces having outer faces;
• and
• a plurality of sliding members being fixed on the outer faces of said commutating pieces, said sliding members including carbon nano tubes whose outermost layers have electric conductivity.

An electric rotary device,

• having a commutator, which comprises:
• a plurality of commutating pieces including electric conductive parts, which have sliding faces on which a brush slides;
• and
• a plurality of sliding members including an electric conductive metal and carbon nano fibers whose outermost layers have electric conductivity, said sliding members being fixed on the sliding faces of the electric conductive parts.

An electric rotary device,

• having a commutator, which comprises:
• a plurality of commutating pieces including electric conductive parts, which have sliding faces on which a brush slides;
• and
• a plurality of sliding members including an electric conductive metal and carbon nano tubes whose outermost layers have electric conductivity, said sliding members being fixed on the sliding faces of the electric conductive parts.