Patent ID: 9251770
Filing Date: 2016-02-02
CPC Classification: G10D

Claim Text:
1. A multi-staged cam assembly for a drum pedal, comprising: a connecting element of which one end is secured to a tip of a stamping pedal; an arc shaped cam of which a front end is secured to the other end of the connecting element, wherein the connecting element is guided along an outer peripheral surface of the cam; a drive shaft to which a drum beating rod is fixed; and a revolving body comprising a boss and a space keeping plate which restricts the cam from moving forward, wherein a hole through which the drive shaft passes is formed in the center of the boss; wherein: an elongated hole is formed in the middle of the space keeping plate; a screw hole is formed in the front face of the cam at a position corresponding to the elongated hole of the space keeping plate; a bolt is inserted in the elongated hole and screwed in the screw hole in the front face of the cam, such the cam is fixed at a desired position; and a length from the center of the hole of the boss to the back end of the cam is varied in a multi-staged way according to the fixed position of the bolt in the elongated hole.