Nidec Copal Electronics Corporation

Toshiya Uchida

Yusuke Saito

Masatoshi Obayashi

Akiyoshi Takahashi

Kyosuke Saso

Takeshi Hijiya

Tadashi Okabe

Takahiro Kikuchi

An air blower capable of preventing a deformation of the vane wheel is provided. A cylindrical holder is provided on rotatable shaft. A vane wheel is provided on the outer circumference of the holder. The holder includes a top section including a plurality of first openings at one end thereof in the axial direction, and includes a flange including a plurality of second openings at the other end thereof, and the vane wheel includes first protrusions to be inserted into the first openings of the holder and fixed to the top section by deformed sections protruding from the first openings, and second protrusions to be inserted into the second openings of the holder and fixed to flange by deformed sections protruding from the second openings.

Air blower

Provided are a fluid dynamic bearing, a motor, and an optical deflector, for which a fixed shaft can be attached with little axial eccentricity. The bearing () is equipped with a fixed shaft (), a sleeve () provided so as to be capable of rotating around the fixed shaft (), dynamic pressure generating sections () provided in the sleeve (), and a lower case () for securing the lower end () of the fixed shaft (). In addition, the bearing is equipped with a retaining case (), which has a chuck () that retains the upper end () of the fixed shaft () secured by the lower case (), and which can be secured to the lower case () in a state that does not generate pressure causing the axial center of the fixed shaft () to move.

Fluid dynamic bearing, motor, and optical deflector

In a gas dynamic pressure bearing mechanism () for smoothing rotary motion of a shaft () by feeding gas to the bearing clearance between the shaft () and a fixed sleeve () for supporting the shaft () through a herring bone groove (), the herring bone groove () is provided in the shaft () such that pressure distribution generated in the bearing clearance moves at a high speed. The herring bone groove () consists of N grooves such that N minimal pressure values appearing alternately with maximal pressure values at the positions where the maximal pressure values of dynamic pressure variation appear in the bearing clearance when the shaft () rotates have such an interval as it becomes lower than the condensation pressure value.

Motor with aerodynamic pressure bearing mechanism

Growing community of inventors

Iruma, Japan

Toshiya Uchida