| 摘要 |
Provided is a compound bow comprising: a bow main body; upper and lower pulley assemblies; a bowstring; and first and second cam cables, wherein at least one of the first and second cam cables is coupled to the fixing projection that moves along as a cam module moves, is wound on a cam cable winding portion via a compensation projection, and then extends toward the other side pulley assembly, and a front portion of the cam module is in contact with the one cam cable and thus the one cam cable is bent when the cam module is moved, to thus release the one cam cable from the cam cable winding portion via the compensating projection from the fixing projection that the one cam cable is coupled, to thereby maintain constant tension of the cam cable and keep the power of the bow. |
| 主权项 |
1. A compound bow comprising:
a bow main body including a handle at a central portion of which a grip portion is formed and a pair of limbs that are respectively coupled to both ends of the handle; upper and lower pulley assemblies each including a pulley that is rotatably coupled to a rotating shaft formed on the rear end of each limb, and a cam that is coupled to the pulley and is rotated with the pulley; a bowstring whose either end is wound on and coupled to the pulley of each of the upper and lower pulley assemblies; and first and second cam cables that are wound around the cam of each of the upper and lower pulley assemblies as the bowstring is pulled, in which one end of each of the first and second cam cables is coupled to one of the upper and lower pulley assemblies, and the other end thereof is coupled to the other of the upper and lower pulley assemblies or the rotating shaft of the other of the upper and lower pulley assemblies, wherein the respective cams of each of the pulley assemblies comprise: a cam cable support portion supporting, the cam cable; a cam module that is movably coupled in an arc trajectory on the pulley to which the cams are coupled; and a fixing unit that fixes the cam module at a desired position on the pulley in order to adjust a draw length of a let-off state, in which the cam cable is supported on the cam cable support portion and then is wound on the outer circumferential surface of the cam module, when the bowstring is pulled, at least one of the first and second cam cables is coupled to a fixing projection that is formed in the cam module and moves along as the cam module moves, is wound on a cam cable winding portion that is penetrated by the rotating shaft via a compensation projection, and then extends toward the other side pulley assembly, and a front portion of the cam module is in contact with the one cam cable and thus the one cam cable is bent when the cam module is moved in which one end of the one cam cable is coupled to the fixing projection of the cam module in order to adjust the draw length of the let-off state, to thus release the one cam cable from the cam cable winding portion via the compensating projection from the fixing projection that the one cam cable is coupled, to thereby maintain constant tension of the cam cable and keep the power of the bow. |
