Seat heater

Patent metadata

Field	Value
Publication number	US-9497801-B2
Application number	US-201213984611-A
Country	US
Kind code	B2
Filing date	Apr 18, 2012
Priority date	Apr 27, 2011
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The seat heater of the present invention comprises: a warming heater provided in a seat section of a seat; a warming heater provided in a back section; an overheating-prevention unit; and a heating unit that heats the overheating-prevention unit, the overheating-prevention unit being configured by a non-return type temperature switch. This configuration allows activating the non-return type overheating-prevention unit prior to reaching an unsafe event, and turns the warming heaters OFF reliably, whereby a seat heater with an aim of implementing both high output and safety can be provided.

First claim

The invention claimed is:

1. A seat heater for use in a seat having a seat section and a back section, comprising:
a first warming heater that warms the seat section of a seat;
a second warming heater that warms the back section of the seat;
a single overheating-prevention unit that prevents overheating of the first warming heater and the second warming heater;
a heating unit that heats the single overheating-prevention unit;
a parallel circuit that connects the first warming heater and the second warming heater in parallel with each other, and having a branch point; and
wherein the single overheating-prevention unit comprises both a return type overheating-prevention unit and a non-return type temperature switch, wherein the non-return type temperature switch is heated by the heating unit and the non-return type temperature switch having an activation temperature higher than the return type overheating-prevention unit, and the single overheating-prevention unit is connected to the parallel circuit via the branch point of the parallel circuit;
the heating unit includes:
a first heating heater installed in the seat section, and electrically connected to the first warming heater, and
a second heating heater installed in the back section, and electrically connected to the second warming heater,
the second heating heater having a caloric value higher than that of the first heating heater.

2. The seat heater according to claim 1 , wherein the overheating-prevention unit has a mechanical part which is mechanically secured to the seat.

Assignees

• Nishikawa Masanori
• Abe Norio
• Hioki Kazuaki
• Fujiwara Yoshimitsu
• Nagayama Kazumi
• Panasonic Ip Man Co Ltd

Inventors

• Nishikawa Masanori
• Abe Norio
• Hioki Kazuaki
• Fujiwara Yoshimitsu
• Nagayama Kazumi

Classifications

• H05B2203/029

  Heaters specially adapted for seat warmers · CPC title

• H05B3/34

  flexible, e.g. heating nets or webs · CPC title

• H05B1/0238 Primary

  For seats · CPC title

• A47C7/748

  for heating · CPC title

• B60N2/5685

  Resistance · CPC title