Fixing Device

A fixing device comprising:

• an endless member;
• a heater that extends inside the endless member and is elongated in a longitudinal direction;
• a nip member extending inside the endless member;
• a backup member, the backup member and the nip member being configured to nip the endless member therebetween to form a nip portion between the endless member and the backup member, wherein a recording sheet is to be conveyed at the nip portion in a conveyance direction;
• a stay extending inside the endless member and configured to support the nip member;
• and
• a reflection member disposed between the heater and the stay and configured to reflect radiant heat from the heater, the reflection member comprising:
• a recessed portion that is recessed toward the stay when viewed from the longitudinal direction and has a downstream end portion in the conveyance direction;
• and
• a downstream flange portion extending from the downstream end portion of the recessed portion to a downstream side relative to the recessed portion in the conveyance direction,
• wherein the stay has:
• a first protrusion protruding toward the downstream flange portion;
• and
• a second protrusion protruding toward the downstream flange portion, the second protrusion being spaced apart from the first protrusion in the longitudinal direction of the heater.

A fixing device comprising:

• an endless member;
• a heater extending inside the endless member;
• a nip member extending inside the endless member;
• a backup member, the backup member and the nip member being configured to nip the endless member therebetween to form a nip portion between the endless member and the backup member, wherein a recording sheet is to be conveyed at the nip portion;
• a reflection member extending inside the endless member and opening toward a portion of the endless member in an opening direction, the reflection member being configured to reflect radiant heat from the heater and including a first flange portion and a second flange portion which are spaced apart from each other in a first direction perpendicular to a longitudinal direction of the heater, a distance between the first flange portion and the second flange portion in the first direction being greater than a dimension of the heater in the first direction;
• and
• a stay having a recessed shape when viewed from the longitudinal direction, the stay comprising:
• a first wall portion having a first surface;
• a second wall portion spaced apart from the first wall portion and having a second surface, the first surface and the second surface defining a space therebetween;
• and
• a third wall portion connecting the first wall portion and the second wall portion,
• wherein a first imaginary extension line, that is defined as an imaginary line extending from the first surface of the first wall portion in the opening direction, intersects the first flange portion of the reflection member.