Patent ID: 6913542
Filing Date: 2005-07-05
Classification: A63B

Abstract:
1. A golf club for showing a swing condition, the golf club having a shaft and a head connecting to the shaft, the head having a striking face, and the golf club comprising: a visible illuminant exposed outside a surface of the head with an upward angle; a battery for providing electrical power to the illuminant; and a centrifugal switch actuated by centrifugal force and mounted on a surface of the head opposite the striking face for controlling a circuit between the battery and the illuminant, the centrifugal switch having an elastic control pole and a fixed pole fixed on the head, the control pole being movable along a direction of centrifugal force during swinging the golf club to contact with the fixed pole, the control pole having a first fixed portion fixed on the head, an elastic portion extending upwardly from the first fixed portion, and a movable first contact portion connecting with the elastic portion; the fixed pole having a second fixed portion fixed on the head and a second contact portion connecting with the second fixed portion and positioned on a moving path of the first contact portion; whereby the illuminant being lit by a predetermined centrifugal force during swinging the golf club for demonstrating a golfer's body harmony and strength-exerting condition.