Patent ID: 8764287

Claim:
A thermal detector comprising: a thermal detecting element; a support member supporting the thermal detecting element, the support member having a mounting member on which the thermal detecting element is mounted and a first arm member connected to the mounting member with the first arm member having an arm base end section extending outwardly from the mounting member toward a first direction, the arm base section having a first width measured along a direction perpendicular to the first direction, and an arm body section having a proximal end portion extending from the arm base end section generally along an outer contour of the mounting member with the proximal end portion being spaced apart from an edge of the mounting member in the first direction, the proximal end portion of the arm body section having a second width measured along a direction perpendicular to a lengthwise direction of the arm body section with the second width being narrower than the first width of the arm base end section; and a wiring layer formed on the mounting member and the first arm member and connected to the thermal detecting element, the wiring layer including a wider width portion connected to the thermal detecting element and arranged on the arm base end section, and a narrower width portion connected to the wider width portion, arranged on the arm body section, and having a width narrower than a width of the wider width portion.