Patent ID: 7708922

Claim:
A method of insert molding a device comprising a first synthetic resin structure, a second synthetic resin structure, and a plurality of metal elastic holding members which link the first synthetic resin structure and the second synthetic resin structure, the device being formed by injecting, from injection ports, synthetic resin into a mold with the elastic holding members placed in the mold, wherein the at least one of the first synthetic resin structure and the second synthetic resin structure includes at least one concave cut-off portion, to prevent shrinkage, located in a vicinity of a junction area between one of the elastic holding members and the first or the second synthetic resin structures; the method comprising: adjusting a size of the concave cut-off portion to correct a strain of the respective one of the elastic holding members which is directly pressed by fluidized synthetic resin during the injecting; and injecting the synthetic resin to mold the device.