Patent ID: 7241236

Claim:
A dart, comprising: a dart barrel having a head portion and a shaft channel coaxially extending at said head portion, and defining a head opening at said head portion to communicate with said shaft channel; a shaft having a sliding end portion and a hitting tip; and a dual action arrangement, which comprises: a tubular shaft housing detachably mounted at said head opening of said dart barrel, wherein said shaft housing has a sliding slot coaxially aligning with said shaft channel for said a sliding end portion of said shaft sliding therealong; and at least a tubular elastic element coaxially mounted at said sliding end portion of said shaft for applying an urging force against an inner circumferential wall of said sliding slot so as to minimize a clearance between said sliding slot and said sliding end portion of said shaft while said sliding end portion of said shaft is allowed to linearly slide along said shaft channel, wherein said sliding slot of said tubular shaft housing has an enlarged slot portion and a contracted slot portion having a diameter smaller than a diameter of said enlarged slot portion to define a retention shoulder formed at said inner circumferential wall of said tubular shaft housing as a boundary between said enlarged slot portion and said contracted slot portion for blocking a downward movement of said shaft along said sliding slot when said elastic element biases against said retention shoulder.