Patent ID: 7355391

Claim:
An electromechanical conversion device comprising: a magnetic field generation unit for generating a magnetic field; an electromechanical conversion unit which performs one of a first conversion and a second conversion based on the magnetic field, the first conversion being a conversion from a relative movement of the electromechanical conversion unit with respect to the magnetic field generation unit, to electrical signals, the second conversion being a conversion from electrical signals inputted to the electromechanical conversion unit, to a relative movement of the electromechanical conversion unit with respect to the magnetic field generation unit; and a cable which is connected with the electromechanical conversion unit, wherein the cable includes a ground wire for connecting the electromechanical conversion unit with ground; and at least one signal wire which is connected with the electromechanical conversion unit to transfer the electrical signals, the signal wire having a first branch portion and a second branch portion, which extend substantially parallel to the ground wire and are respectively arranged at two opposite sides of the ground wire to interpose the ground wire therebetween, two ends of the second branch portion being respectively connected with two ends of the first branch portion.