Ventilation fan

Patent metadata

Field	Value
Publication number	US-9028223-B2
Application number	US-201113293154-A
Country	US
Kind code	B2
Filing date	Nov 10, 2011
Priority date	Nov 11, 2010
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

In a ventilation fan of inner rotor type in which a shaft is fixed to a motor supporting portion, the shaft is held by a shaft holding portion preferably provided by, for example, a metal member. The shaft holding portion includes a cylindrical portion which is fixed to a resin of the motor supporting portion preferably by being embedded through insert molding and into which the shaft is inserted, and a shaft holding flange portion extending outwards in the radial direction from either one of an upper end or a lower end of the cylindrical portion.

First claim

What is claimed is:

1. A ventilation fan comprising:
a shaft arranged on a center of rotation of the ventilation fan;
a rotor holding portion rotatably supported about the shaft via a bearing;
a rotor magnet held on a radially outer surface of the rotor holding portion;
a stator arranged opposite to the rotor magnet on the radially outer side of the rotor magnet;
an impeller arranged to rotate together with the rotor magnet and the rotor holding portion; and
a motor supp…

Assignees

• Kitamura Jumpei
• Nidec Corp

Inventors

• Kitamura Jumpei

Classifications

• H02K1/187

  Electricity · mapped topic

• F04D19/002

  Mechanical Engineering · mapped topic

• H02K5/08 Primary

  Electricity · mapped topic

• H02K7/14

  Electricity · mapped topic

• H02K1/30

  Electricity · mapped topic