A kind of structural improvement of sinker,Comprising plummet and rotor,The plummet system what one end, which is equipped with one and sets, holds space,And what this set hold space in connection the rotor,And the rotor system includes ring body and hollow cylindrical body,And the ring system and the cylindrical body are connected with each other； Accordingly,When setline is tied up in the ring body of the what rotor,This creation is put into water again,Even if the plummet leads to rotation by water currents,The rotor because the gravity by the plummet pulls downwards,It withstands,Even the rotor system not will receive water currents and rotate in water,Also the influence that not will receive the plummet and then rotates,Make setline not become the tight tension for causing setline because of rotation to reduce,And then when making reversal interlocking relay of the setline by fish,Having enough tension whats, this contends with.一種沉子之結構改良，包含鉛錘及轉子，該鉛錘係於一端設有一置容空間，並於該置容空間內連接該轉子，而該轉子係包含環體及中空的圓柱體，且該環體係與該圓柱體相互連接；據此，當釣魚線綁於該轉子之環體上時，再將本創作投入水中，即使該鉛錘遭受到水流影響導致旋轉時，該轉子因受到該鉛錘之重力向下拉扯、頂住，即便是在水中該轉子係不會受到水流影響而旋轉，亦不會受到該鉛錘的影響跟著旋轉，使釣魚線不會因為旋轉而變得緊繃造成釣魚線之張力縮減，進而使釣魚線受到魚的反向拉力時，具備有足夠的張力於此抗衡。
