ADJUSTABLE VALVE MECHANISM

A variable valve mechanism includes: a cam that rotates about a rotating shaft in association with rotation of a crank shaft of an engine; a swinging arm that is disposed between the cam and a valve and is pushed by the rotating cam to swing and push the valve by a first end portion of the swinging arm; a moving device that moves a second end portion of the swinging arm; a regulating member that is coupled to the first end portion of the swinging arm so as to be rotatable about a swinging shaft parallel to the rotating shaft and regulates displacement of the first end portion of the swinging arm relative to the valve when the second end portion of the swinging arm is moved by the moving device; and a connection member that connects the second end portion of the swinging arm to the moving device such that when the second end portion of the swinging arm is moved by the moving device, movement of the second end portion of the swinging arm about the swinging shaft is allowed.