Patent ID: 9236038
Filing Date: 2016-01-12
CPC Classification: G10D

Claim Text:
1. A pedal device for a drum, the pedal device comprising: a unit body having a base and a column extending upward from a front end of the base; a pedal rotationally attached to a rear end of the base; a shaft supported on an upper end of the column; a beater provided on the shaft, wherein the beater rotates around an axis of the shaft to beat a drum; a crank arm that rotates around the axis of the shaft together with the beater; a transmission member coupled to a free end of the pedal, wherein the transmission member transmits operating force of the pedal to the beater; a spring with an upper end coupled to the crank arm and a lower end supported on the unit body, wherein the spring has an axis, a bracket provided on the unit body, wherein the bracket supports the spring in a manner allowing the spring to swing, a bolt coupled to the lower end of the spring, wherein the bolt has an upper end located above the bracket and a lower end located below the bracket, and an adjusting nut engaged with the lower end of the bolt, wherein the adjusting nut is operable to adjust the position of the bolt in a direction of an axis of the bolt, wherein the pedal is held in a standby position by the spring while the axis of the spring lies in a common plane with a reference line connecting the lower end of the spring and a rotation center of the crank arm, the operating force of the pedal is transmitted through the transmission member to the beater to rotate the beater, and the crank arm rotating together with the beater causes the spring to swing back and forth about the lower end of the spring, which is a fulcrum, the spring swings together with the bolt and the adjusting nut about a common fulcrum, and the fulcrum of the spring is provided on a lower surface of the bracket.