An acceleration sensitive switch arrangement includes an acceleration sensitive variable capacitor, a detection circuit for detecting a capacitance value of the variable capacitor, and a switching circuit responsive to a comparison between the detected capacitance and a threshold value. This allows for ease in expanding functions. The inner mold surface includes at least one transfer surface portion against which the at least one mirror surface of the molded product is formed, and at least one non-transfer surface portion against which the sink surface portion of the molded product is formed.