Patent ID: 7341293

Claim:
A chopstick comprising: an upper body having a penetrating receiving chamber; an upper inner side of the receiving chamber being formed with an annular groove; a lower end of the upper body having two through holes; a lower body having an insertion section at an upper end thereof; a wall surface of the insertion section having a receiving chamber; one end of the receiving chamber having a through hole; a ball, a spring, and a retaining block being sequentially installed in the receiving chamber; the ball being protruded into the through hole; the retaining block being retained in the receiving chamber; and the spring and ball are positioned in the receiving chamber; and wherein a lower end of the lower body has a brush; the brush has brush hairs; when the lower body is inserted into the receiving chamber of the upper body and reciprocally moves therein, the brush hairs of the brush will clean the inner wall of the receiving chamber of the upper body.