| CPC B25C 1/06 (2013.01) | 10 Claims |
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1. A fastener driver, comprising:
a housing, limiting a head portion and a handle portion;
a driving mechanism, located in the housing;
an emission mechanism, comprising:
a piston;
a driver firing pin, attached to the piston;
a bias mechanism, provided with a first end portion supported in the piston and a second end portion supported by the head portion, and configured to enable the piston and the driver firing pin to move from a first position to a second position;
a jack assembly, driven by the driving mechanism to enable the piston and the driver firing pin to move from the second position to the first position against a bias force of the bias mechanism;
a first guide member, movably supporting the piston; and
second guide members, movably supporting a support frame connected with the piston and moving together with the piston, located between the first guide member and a jack, and disposed in parallel to the first guide member, wherein
cylindrical protruding shafts are disposed on the support frame in a protruding manner towards the jack assembly, convex arc-shaped protruding portions are disposed on the jack assembly in a protruding manner towards the support frame, and the protruding portions and the protruding shafts cooperate with each other to transmit torsion output by the driving mechanism to the emission mechanism; and
due to convex arc shapes of the protruding portions, acting forces received by the protruding portions and the protruding shafts in the relative motion process of the protruding portions and the protruding shafts is always in an arc and cylindrical surface contact state.
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