FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: SEO HIROSHI, YOSHINAGA HIROSHI, HASE TAKAMASA, SAWADA KAZUNARI, ISHII KENJI, TAKAGI HIROTADA, KOBASHIGAWA SHOTA, KISHI KAZUTO, FUJIMOTO IPPEI, MATSUZAKA SUSUMU, SETO TAKASHI, OGINO YASUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 01.12.2016
• Subjects: BEARINGS; BLASTING; CINEMATOGRAPHY; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; LIGHTING; MAGNETOGRAPHY; MECHANICAL ENGINEERING; PHOTOGRAPHY; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a fixing device including a heat source that can maintain temperature uniformity and prevent the occurrence of current leakage.SOLUTION: There is provided a fixing device 150 comprising: an endless belt member 80 that has flexibility; a pressure member 84 that is arranged opposite to the belt member 80; a nip forming member 88 that is pressed by the pressure member 84 with the belt member 80 therebetween to form a nip; first heat sources 82a, 82b that heat an area smaller than the maximum sheet size in an axial direction of the belt member 80; and a second heat source 112 that heats an area corresponding to the maximum sheet size in the axial direction of the belt member 80, wherein the nip forming member 88 includes a heat uniformizing member 110 that uniforms heat from the second heat source 112, and an insulating member 115 that is disposed between the second heat source 112 and the heat uniformizing member 110.SELECTED DRAWING: Figure 7 【課題】温度均一性を保つことができると共に電流リークの発生を防止することが可能な熱源を有する定着装置を提供する。【解決手段】可撓性を有する無端状のベルト部材８０と、ベルト部材８０と対向配置された加圧部材８４と、ベルト部材８０を介して加圧部材８４に加圧されることでニップを形成するニップ形成部材８８と、ベルト部材８０の軸方向において最大用紙サイズよりも狭い領域を加熱する第１の熱源８２ａ，８２ｂと、ベルト部材８０の軸方向において最大用紙サイズに対応した領域を加熱する第２の熱源１１２とを有し、ニップ形成部材８８は、第２の熱源１１２からの熱を均一化させる均熱部材１１０と、第２の熱源１１２と均熱部材１１０との間に配設された絶縁部材１１５とを有する定着装置１５０。【選択図】図７