Heater, fixing device, image-forming device, and heating device

A heater for heating an object to be heated in such a manner that at least one of the object to be heated and the heater is swept with the heater disposed opposite the object to be heated,

• the heater comprising:
• a base having a rectangular shape;
• and
• a plurality of heating cells each independently receiving power supply,
• the heating cells being disposed on the base and arranged in a longitudinal direction of the base,
• wherein
• each of the heating cells includes a plurality of lateral wires extending in substantially parallel with the longitudinal direction of the base, and a plurality of oblique wires tilted relative to the lateral wires,
• the lateral wires and the oblique wires are connected to form a serpentine shape as a whole,
• each of the heating cells further includes a first folded part where a corresponding one of the lateral wires and a corresponding one of the oblique wires are folded at an obtuse angle, and
• in the first folded part, the lateral wire is connected to the oblique wire via an inversely oblique wire forming an acute angle or a right angle with respect to the oblique wire.