Patent ID: 8409037

Claim:
A training instrument, comprising: a shaft; a grip being attached to the shaft; a rigid holder-attaching pipe in which the shaft is inserted; a first, second, and third wing holders having tubular shapes, in which the holder-attaching pipe is inserted; leaf-shaped wings being attached to the first, second, and third wing holders, respectively; a first stopper of a tubular shape being fixed to the shaft to prevent the holder-attaching pipe from moving to the grip side; a second stopper of a tubular shape in which the shaft is inserted to be concentric on the first stopper and attachable to and detachable from the first stopper; a third stopper of a tubular shape being fixed to the shaft and preventing the second stopper from moving to the grip side; and a fourth stopper being attached to an end of the shaft, wherein when the second stopper is fixed to the first stopper, the first and second wing holders are prevented from moving to the grip side, and when the second stopper is released from the first stopper, the second stopper is moved to the third stopper, and then, the first and second wing holders are moved from the holder-attaching pipe on a surface of the first stopper, followed by folding the wings.