Panasonic Corporation

Hiroshi Yoshikawa

Tetsuji Kawazu

Kiyohiko Iwamoto

Kiminobu Yamamoto

Yoshiki Tanimura

A ceiling fan includes a motor which rotates a plurality of blades, a shaft projecting from the motor, a pipe connected to an upper end of the shaft and which hangs from a ceiling surface, and a connecting rod for connecting the pipe and the shaft with each other via through holes formed in the pipe and the shaft, respectively. The ceiling fan also includes a displacement-correspondence tool which is displaced or which detects a displacement amount in correspondence with a relative positional displacement amount between the shaft and the pipe, and a power source control tool which controls energization to the motor in accordance with the displacement of the displacement-correspondence tool or the detected displacement amount.

Ceiling fan

A ceiling fan includes a motor for rotating multiple blades. This motor includes a hollow shaft that is disposed upright on the center of a disc-like stator, and a rotor around an outer periphery of the stator. The rotor integrally rotates with the blades. This motor further includes a cylindrical bearing housing, and a pair of ball bearings including an upper ball bearing and a lower ball bearing housed in this bearing housing. This bearing housing has a base in its center. The upper ball bearing is disposed over the base, and the lower ball bearing is disposed under the base in this bearing housing. Both bearings are fixed onto the hollow shaft.

Growing community of inventors

Aichi, Japan

Hiroshi Yoshikawa