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US 5,671,193 AGranted
Rotary polygonal mirror and method of manufacturing the same
AssigneeCanon Kabushiki Kaisha
InventorMasaaki Kuroda
Life of this patent
Estimating the term…
Abstract
A rotary polygonal mirror for a deflection scanning device includes a regular prism-shaped main body portion consisting of a resin material, a projecting portion which projects from an upper surface of a central portion of the main body portion, and a reflection film formed on side surfaces of the main body portion. The projecting portion consists of the same resin material as the resin material of the main body portion. The main body portion and the projecting portion are integrally molded by injection molding or injection compression molding. A gate portion in the molding is provided to the projecting portion.
Claims17
A rotary polygonal mirror comprising:
- a regular prism-shaped main body portion including a resin material;
- a projecting portion which projects from an upper surface of a central portion of said main body portion, said projecting portion having the same resin material as the resin material of said main body portion;
- and
- a reflection film formed on side surfaces of said main body portion,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion in the molding is provided to said projecting portion.
2 more elements
A rotary polygonal mirror comprising:
- a regular prism-shaped main body portion including a resin material, with a shaft hole formed in a central portion of said main body portion;
- a projecting portion formed in the vicinity of the shaft hole and projecting from an upper surface of said main body portion, said projecting portion having the same resin material as the resin material of said main body portion;
- and
- a reflection film formed on side surfaces of said main body portion,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
2 more elements
A method of manufacturing a rotary polygonal mirror, comprising the steps of:
- integrally molding a rotary polygonal mirror main body, which comprises a regular prism-shaped main body portion and a projecting portion projecting from an upper surface of a central portion of the main body portion by injection molding or injection compression molding using a resin material by providing a gate portion to be used in molding to the projecting portion;
- removing the gate portion at the projecting portion after molding the main body;
- and
- forming a reflection film on side surfaces of the rotary polygonal mirror main body after the gate portion is removed.
1 more element
A light deflection device comprising:
- a rotary polygonal mirror for deflecting a light beam, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of a central portion of said main body and (III) a reflection film formed on side surfaces of said main body portion;
- and
- driving means for rotating said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
1 more element
A light deflection device comprising:
- a rotary polygonal mirror for deflecting a light beam, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a shaft hole formed in a central portion of said main body portion, (III) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of said main body portion in the vicinity of the shaft hole, and (IV) a reflection film formed on side surfaces of said main body portion;
- and
- driving means for rotating said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
1 more element
A deflection scanning device comprising:
- a light source;
- a rotary polygonal mirror for deflecting a light beam from said light source, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of a central portion of said main body portion, and (III) a reflection film formed on side surfaces of said main body portion;
- and
- driving means for rotating said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
2 more elements
A deflection scanning device comprising:
- a light source;
- a rotary polygonal mirror for deflecting a light beam from said light source, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a shaft hole formed in a central portion of said main body portion, (III) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of said main body portion in the vicinity of the shaft hole, and (IV) a reflection film formed on side surfaces of said main body portion;
- and
- driving means for rotating said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
2 more elements
A laser beam printer apparatus comprising:
- a light source;
- a rotary polygonal mirror for deflecting a light beam from said light source, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of a central portion of said main body portion, and (III) a reflection film formed on side surfaces of said main body portion;
- driving means for rotating said rotary polygonal mirror;
- and
- a photosensitive body for receiving the light beam deflected by said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
3 more elements
A laser beam printer apparatus comprising:
- a light source;
- a rotary polygonal mirror for deflecting a light beam from said light source, said rotary polygonal mirror comprising (I) a regular prism-shaped main body portion including a resin material, (II) a shaft hole formed in a central portion of said main body portion, (III) a projecting portion which has the same resin material as the resin material of said main body portion, and projects from an upper surface of said main body portion in the vicinity of the shaft hole, and (IV) a reflection film formed on side surfaces of said main body portion;
- driving means for rotating said rotary polygonal mirror;
- and
- a photosensitive body for receiving the light beam deflected by said rotary polygonal mirror,
- wherein said main body portion and said projecting portion are integrally molded by injection molding or injection compression molding, and a gate portion to be used in the molding is provided to said projecting portion.
3 more elements
Dependencies are inferred from the claim text.