Patent ID: 6865799

Claim:
A method of manufacturing strain-detecting devices, comprising the steps of: fixedly placing, in a plurality of through-holes formed at predetermined plural positions of a fixing plate, respectively, a plurality of cylindrical substrates each of which has one end closed by a diaphragm, an elastic member being formed to have a rod-shaped piece having two ends and being arranged in a circumferential direction along a round wall surface of each through-hole, one or both ends of the rod-shaped piece being integrally fixed on the wall surface, wherein a remaining one of both ends of the rod-shaped piece is elastically deformable in a thickness direction of the fixing plate, the remaining end of the rod-shaped piece having a protruding part integrally formed thereon to protrude in the thickness direction of the fixing plate, wherein the protruding part is connected to each substrate inserted through each through-hole, and a positioning marker being previously formed at a given position of the fixing plate; mounting the fixing plate having the substrates to a jig so that the substrates are sustained by the jig to hold an outer surface of the diaphragm of each substrate at the same level higher by a predetermined height from a reference position of the jig; positioning all the substrates so that all the diaphragms thereof are positioned in place in the plane direction of the fixing plate with reference to the positioning marker; and forming a strain gage portion on each of all the diaphragms at the same time.