Heater and fixing device

A heater used for a fixing device comprising:

• a substrate having a lengthwise direction and a widthwise direction;
• a heat generation element arranged on the substrate;
• a plurality of temperature detection elements arranged on the substrate;
• a plurality of conductive line groups, each of the plurality of conductive line groups includes two conductive lines for extracting signal corresponding to temperature electrically connected to each of the plurality of temperature detection elements, the plurality of conductive line groups being arranged on the same face of the substrate on which the plurality of temperature detection elements are arranged;
• and
• a protection layer that covers the plurality of temperature detection elements and the plurality of conductive line groups,
• wherein a first conductive line, which is one of the two conductive lines in each of the plurality of the conductive line groups is arranged to extend from one of the plurality of temperature detection elements toward one end portion of the substrate in the lengthwise direction of the substrate, and a second conductive line, which is the other conductive line of the two conductive lines in each of the plurality of the conductive line groups is arranged to extend from the one of temperature detection element toward the other end portion of the substrate in the lengthwise direction of the substrate,
• wherein a first conductive line in each of the plurality of the conductive line groups is arranged in an area extending from a first position where the temperature detection element is arranged in the width direction of the substrate to a second position different from the first position in the width direction of the substrate, and
• wherein the first conductive line in each of the plurality of the conductive line groups has a region inclined with respect to both the lengthwise and widthwise directions of the substrate and does not have a region extending only in a direction parallel to the widthwise direction of the substrate in an area covered by the protection layer.

A heater used for a fixing device comprising:

• a substrate having a lengthwise direction and a widthwise direction;
• a heat generation element arranged on the substrate;
• a temperature detection element arranged on the substrate;
• two conductive lines for extracting signal corresponding to temperature electrically connected to the temperature detection element, the two conductive lines being arranged on the same face of the substrate on which the temperature detection element is arranged;
• and
• a protection layer that covers the temperature detection element and the two conductive lines,
• wherein a first conductive line, which is one of the two conductive lines is arranged to extend from the temperature detection element toward one end portion of the substrate in the lengthwise direction of the substrate, and a second conductive line, which is the other conductive line of the two conductive lines is arranged to extend from the temperature detection element toward the other end portion of the substrate in the lengthwise direction of the substrate and then turns and extends to the one end portion of the substrate,
• wherein the second conductive line is arranged in an area extending from a first position where the temperature detection element is arranged in the width direction of the substrate to a second position different from the first position in the width direction of the substrate, and
• wherein the second conductive line has a region inclined with respect to both the lengthwise and widthwise directions of the substrate and-de does not have a region extending only in a direction parallel to the widthwise direction of the substrate in an area covered by the protection layer.

A heater used for a fixing device comprising:

• a substrate having a lengthwise direction and a widthwise direction;
• a heat generation element arranged on the substrate;
• a plurality of temperature detection elements arranged on the substrate;
• a plurality of conductive line groups, each of the plurality of conductive line groups includes two conductive lines for extracting signal corresponding to temperature electrically connected to each of the plurality of temperature detection elements, the plurality of conductive line groups being arranged on the same face of the substrate on which the plurality of temperature detection elements are arranged;
• and
• a protection layer that covers the plurality of temperature detection elements and the plurality of conductive line groups,
• wherein a first conductive line, which is one of the two conductive lines in each of the plurality of the conductive line groups is arranged to extend from one of the plurality of temperature detection elements toward one end portion of the substrate in the lengthwise direction of the substrate, and a second conductive line, which is the other conductive line of the two conductive lines in each of the plurality of the conductive line groups is arranged to extend from the one of temperature detection element toward the other end portion of the substrate in the lengthwise direction of the substrate and then turns and extends to the one end portion of the substrate,
• wherein the second conductive line in each of the plurality of the conductive line groups is arranged in an area extending from a first position where the temperature detection element is arranged in the width direction of the substrate to a second position different from the first position in the width direction of the substrate, and
• wherein the second conductive line in each of the plurality of the conductive line groups has a region inclined with respect to both the lengthwise and widthwise directions of the substrate and does not have a region extending only in a direction parallel to the widthwise direction of the substrate in an area covered by the protection layer.