Rankin, Hill & Clark LLP
Electronic percussion
With an electronic percussion 100, a mesh-shaped head 101 is supported by a shell 103 formed into a cylindrical shape. The shell 103 includes an optical sensor 105 inside and a sensor cover body 110 outside. The optical sensor 105 includes a light emitter 105a that irradiates light to a back surface 101b of the head 101 and a light receiver 105b that receives reflected light from the back surface 101b of the head 101. This optical sensor 105 is supported by a sensor supporting body 104 at a position adjacent to the back surface 101b of the head 101. The sensor cover body 110 is formed so as to have a size with which the sensor cover body 110 covers the optical sensor 105 at the position that is opposed to the optical sensor 105 on a struck surface 101a side, which is opposite to the back surface 101b of the head 101 and which faces the optical sensor 105. 
ATV corporation
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Yoshiaki
Mori