Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Shigeo Itou

Tetsuji Kawazu

Hiroyuki Kuramochi

Kiminobu Yamamoto

Kiyohiko Iwamoto

Kazuyuki Kobayashi

Hitoshi Nakamichi

Tatsuya Yamashita

A fan blade includes a blade body blowing air and a root portion secured to a support part. A first end part of a fall prevention member is attached to a first mount portion provided in the support part, and a second end part of the fall prevention member is attached to a second mount portion provided in the blade body. A controller controls electric energization to a DC motor to cause the fan blade to stop rotating when the fan blade breaks, the blade body is retained by the fall prevention member, the blade body is tilted, and at least one of a current value or a rotation speed measured by a measurer changes from a predetermined value.

Ceiling fan

A ceiling fan includes a suspension part, a pipe, and a main body, the main body has a coupling part, an upper portion of the coupling part has a coupling hole, a lower portion of the pipe has a pipe hole, the coupling part is inserted into the pipe, a bolt inserted into the coupling hole and the pipe hole, and a nut. The bolt includes a threaded portion and a head having a curved surface that conforms to the shape of the outer surface of the pipe. The curved surface has a head direction guide part that guides the direction of the curved surface such that the curved surface is fixed in contact with the outer surface with the nut.

A ceiling fan includes a connecting portion fixed to a ceiling, an electric motor having a rotation shaft disposed on a lower portion of the connecting portion, a temperature detector provided on a lower portion of the electric motor for detecting a peripheral temperature, and a controller for estimating a room temperature based on the temperature detected by the temperature detector and driving the electric motor according to the estimated room temperature.

A configuration including outer-rotation motor portion () including stator () with a center through which fixed axis () passes, and rotor () pivotally supported capable of rotating around stator (); a plurality of blade plates () radially arranged on rotor (); support base () having fixed axis () in a center thereof and located in a lower part of stator (); angle changing unit () provided on support base (); and a plurality of stationary blade plates () being detachably placed on stationary blade holders provided on angle changing unit (). With the configuration in which an elevation/depression angle of stationary blade plates () is adjustable by at least one stationary blade driving motor () that drives angle changing unit (), a structure is simplified.

A ceiling fan comprising a disc-like stator provided with a fixed shaft at the center, an annular rotor disposed in proximity to the periphery of the stator, a supporting frame fixed to the rotor and rotatably supported by the fixed shaft; a fan blade fixed to the supporting frame; and a retaining member having one end fixed to the supporting frame together with the fan blade and the other end coupled to the fan blade, wherein the fan blade comprises a root portion fixed to the supporting frame, a blade portion coupled with the retaining member, and an offset portion formed by bending between the root portion and the blade portion, thereby preventing the fan blade from being damaged easily even when it is impressed with a load and ensuring the safety even if the fan blade is broken since the blade portion is held coupled to the rotor side.

Growing community of inventors

Osaka, Japan

Shigeo Itou