Patent ID: 8667849

Claim:
A pressure sensor comprising: a container; a pressure receiving member which forms a part of the container and is displaced toward the inner side or the outer side of the container in response to force; a pressure sensitive element which has a pressure sensing portion and a pair of base portions connected to both ends of the pressure sensing portion, and which has a detection axis parallel to a line connecting the base portions, and in which the detection axis is parallel to a displacement direction of the pressure receiving member, and which detects pressure based on displacement of the pressure receiving member; and a frame which includes a pair of shock absorbing portions that interposes the pressure sensitive element and is connected to a side of the pressure receiving member close to the peripheral portion or a side of the container close to the pressure receiving member and a beam portion that connects distal ends of the shock absorbing portions, wherein one of the base portions of the pressure sensitive element is connected to the pressure receiving member, and the other base portion on the opposite side of the base portion is connected to a central portion in a longitudinal direction of the beam portion, and wherein when the length of the pressure sensitive element is L A , the Young's modulus of the pressure sensitive element is E A , the cross-sectional area of the pressure sensitive element is S A , the length of the shock absorbing portion is L B , the Young's modulus of the shock absorbing portion is E B , and the cross-sectional area of the shock absorbing portion is S B , the following relation is satisfied E A ⁢ L B ⁢ S A E B ⁢ L A ⁢ S B ≥ 1.