VIBRATION DETECTOR

PROBLEM TO BE SOLVED: To solve the problem that the force of pressing a detection means to a living body is fixed and is not variable in a conventional vibration detector for detecting biological information. SOLUTION: A pressing means for pressing the detection means is provided with a first magnetic force generation means and a second magnetic force generation means so as to superpose planarly. In the first magnetic force generation means and the second magnetic force generation means, the same magnetic poles are provided so as to oppose each other to generate repulsive force. This repulsive force deforms the pressing means 10 composed of elastic material having flexibility such as silicone, elastomer, thereby making the detection means press the living body being a measurement object. The magnetic force generation means can also be constituted of electromagnet, in this case, the pressing force can be made variable. COPYRIGHT: (C)2009,JPO&INPIT