Shielding cover having cooling fin and optical scanning device
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorTakahiro Kojima
Life of this patent
Estimating the term…
Abstract
The present invention insulates the source of noise efficiently by forming a thick noise insulating portion to the cover to tightly seal a drive unit which generates heat and noise and at the same time, increases the cooling effect of cooling fins by making the surface areas of the cooling fin ends that are away from the noise insulating portion wide by the amount equivalent to the surface area of the cooling fins decreased by the noise insulating portion provided, and obtains the shielding cover that is excellent in both cooling and noise insulation.
Claims21
A shielding cover having cooling fins comprising:
- housing means for supporting a driving means;
- covering means for tightly sealing the driving means in the housing means;
- noise insulating means, provided to the covering means at a portion near a noise source of the driving means, for insulating noise generated from the noise source;
- and
- cooling means for cooling the driving means, the cooling means including plural flat plate shape fins arranged in parallel on the surface of the covering means,
- wherein the noise insulating means is formed by making the covering means thick, and the fins of the cooling means are formed by making the surface area of the portion of the driving means away from the noise source wider than the portion near the noise insulating means, and
- wherein upper ends of the plural cooling fins are formed in a straight line shape and roots of the plural cooling fins are formed in conical shape with the portion near the noise source made as a top of the conical shape.
(canceled)
A shielding cover having cooling fins comprising:
- a housing to support a polygon motor;
- a cover unit to tightly seal the polygon motor in the housing;
- a noise insulating unit provided to the cover unit at a portion near a noise source of the polygon motor;
- and
- plural flat shape cooling fins arranged in parallel on the surface of the cover unit,
- wherein the noise insulating unit is formed by making the cover unit thick and the cooling fins are formed so as to make the surface area of the portion away from the noise source of the polygon mirror wider than the portion near the noise insulating unit, and
- wherein upper ends of plural cooling fins are formed in a straight line shape and roots of the plural cooling fins are formed in conical shape with the portion near the noise source made as a top of the conical shape.
(canceled)
An optical scanner comprising:
- a polygon mirror;
- a polygon motor to rotate the polygon mirror;
- a cover unit to tightly seal the polygon mirror and the polygon motor in the housing;
- a noise insulating unit provided on the cover unit at a portion near the source of noise of the polygon motor;
- and
- plural flat plate shape cooling fins arranged in parallel on the surface of the cover unit,
- wherein the noise insulating unit is made by forming the covering unit thick and the cooling fins are formed so as to make the surface area of the portion away from the noise source of the polygon mirror wider than a portion near the noise insulating unit.
A shielding cover having cooling fins comprising:
- housing means for supporting a driving means;
- covering means for tightly sealing the driving means in the housing means;
- noise insulating means, provided to the covering means at a portion near a noise source of the driving means, for insulating noise generated from the noise source;
- and
- cooling means for cooling the driving means, the cooling means including plural flat plate shape fins arranged in parallel on the surface of the covering means,
- wherein upper ends of the plural cooling fins are formed in a straight line shape and roots of the plural cooling fins are formed in a conical shape with the portion near the noise source made as a top of the conical shape.
A shielding cover having cooling fins comprising:
- a housing to support a polygon motor;
- a cover unit to tightly seal the polygon motor in the housing;
- a noise insulating unit provided to the cover unit at a portion near a noise source of the polygon motor;
- and
- plural flat shape cooling fins arranged in parallel on the surface of the cover unit,
- wherein upper ends of the plural cooling fins are formed in a straight line shape and roots of the plural cooling fins are formed in a conical shape with the portion near the source of noise made as a top of the conical shape.
Dependencies are inferred from the claim text.