HEATER, AND FIXATION DEVICE, IMAGE FORMATION DEVICE, AND HEATING DEVICE EQUIPPED WITH SAME

• Main Authors: SUZUKI FUMIKATSU, KATO SHOHEI, MORITA TOMOHIRO, UMEMURA YUJI
• Format: Patent
• Language: English; Korean
• Published: 07.05.2015
• Subjects: CINEMATOGRAPHY; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

본 발명의 목적은, 저항 발열 배선으로 이루어지는 복수의 셀 패턴을 병렬 접속해서 구비한 히터에 있어서, 셀 패턴의 단선을 검지할 수 있는 히터와 그것을 구비하는 정착 장치, 화상 형성 장치 및 가열 장치를 제공하는 것이다. 본 히터(1)는, 기체(11)와, 기체(11)에 배치된 저항 발열 배선(12)과, 저항 발열 배선(12)으로부터 절연되어 기체(11)에 배치된 단선 검지 배선(13)을 구비하고, 저항 발열 배선(12)은, 실질적으로 동일한 발열 특성을 갖고, 또한, 서로 전기적으로 병렬로 접속된, 복수의 셀 패턴(121)을 갖고, 단선 검지 배선(13)은, 온도에 의존하여 저항값이 변화되는 감응부(131)를, 셀 패턴(121)의 각각에 대응해서 가짐과 함께, 감응부(131)끼리가 전기적으로 접속되어 일체로 된 배선이며, 단선 검지 배선(13)은, 어느 하나의 셀 패턴(121)이 단선된 경우에, 단선에 의한 온도 변화에 기인해서 저항 변화를 발생시킨다. The purpose of the present invention is to provide a heater which is equipped with a plurality of cell patterns comprising resistive heating wiring connected in parallel and is capable of detecting burn-out of cell patterns, and to provide a fixation device, an image formation device, and a heating device equipped with the heater. This heater (1) is equipped with a base (11), resistive heating wiring (12) that is provided on the base (11), and burn-out detection wiring (13) that is provided on the base (11) while insulated from the resistive heating wiring (12). The resistive heating wiring (12) has multiple cell patterns (121) that have substantially the same heat-generating characteristics and are electrically connected in parallel to one another. The burn-out detection wiring (13) has a sensing section (131) with a temperature-dependent resistance value for each of the cell patterns (121) and is formed as a single body by electrically connecting the sensing sections (131) together. In the event of any one of the cell patterns (121) burning out, the resistance of the burn-out detection wiring (13) changes due to the change in temperature caused by the burn-out.