| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the shooting strength cannot be increased or decreased based on an operation angle because the amount of drawing of a coil spring and its shooting strength have a proportionality relation as between displacement and power in Hooke's law in a shooting force adjustment device increasing the shooting strength with the drawing of the coil spring. SOLUTION: A protruding portion is provided on the outside periphery of a first adjustment reel rotating in conjunction with the rotation of a shooting handle so as to significantly increases the urging force after engagement as compared with the urging force before engagement and taking up the coil spring, when the shooting handle is rotated beyond a normal operation range for rightward shooting, the protruding portion engages with the halfway position of the coil spring, regulating the elastic deformation range of the coil spring with the rotation of a cam board. COPYRIGHT: (C)2009,JPO&INPIT
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