An impact device includes a drive assembly, a cam having a ramp and a fall-off, and a follower associated with the cam. During rotation of the cam, one of the cam or the follower axially displaces as the follower traverses the cam and falls off the fall-off to transform the rotary motion of the drive assembly to a reciprocating motion having a saw-tooth shape that includes a gradual retraction and a quick extension. The quick extension creates an impact loading, which can be used, for example, for driving a fastener into a work piece.

A composite staple magazine for tackers includes a guide member, a receiving body, a support member, a push member, a resilient member and an end member. The receiving body is fixed to the guide member. The support member is made of plastic material and snapped to the receiving body. The support member includes two respective positioning portions which are engaged with the engaging portion of the receiving body. The resilient member is wrapped to the roller of the support member and connected to the push member which is slidably mounted to the receiving body. The resilient member pushes the staples forward. The end member is fixed by a bolt. The composite staple magazine is simple, easily assembled and saves cost.

An impact device includes a drive assembly, a cam having a ramp and a fall-off, and a follower associated with the cam. During rotation of the cam, one of the cam or the follower axially displaces as the follower traverses the cam and falls off the fall-off to transform the rotary motion of the drive assembly to a reciprocating motion having a saw-tooth shape that includes a gradual retraction and a quick extension. The quick extension creates an impact loading, which can be used, for example, for driving a fastener into a work piece.

A fastener, such as a staple, includes a body having a bridge portion, a first leg, and a second leg. The body extends along an axial direction. Each of the first and second legs has an inner surface and an outer surface. The inner surfaces of the first and second legs are disposed in facing relation to define a distance therebetween. In one embodiment, the distance decreases along the axial direction in a direction towards the bridge portion.

In one aspect of the invention, a floor nailing gun includes a nail magazine; a sleeve component; a nail ejecting component; an elastic component; and a base, where an end face of one end of the nail magazine is provided with at least one threaded hole for fixedly connecting the nail magazine to the base, and the sleeve component, the nail ejecting component, and the elastic component are mounted on the nail magazine, wherein the nail magazine is provided with an L-shaped groove having an L-shaped cross section or a T-shaped groove having a T-shaped cross section, and a boss for preventing nails from jumping up and down is formed at the top of the L-shaped groove or the T-shaped groove.

A composite staple magazine for tackers includes a guide member, a receiving body, a support member, a push member, a resilient member and an end member. The receiving body is fixed to the guide member. The support member is made of plastic material and snapped to the receiving body. The support member includes two respective positioning portions which are engaged with the engaging portion of the receiving body. The resilient member is wrapped to the roller of the support member and connected to the push member which is slidably mounted to the receiving body. The resilient member pushes the staples forward. The end member is fixed by a bolt. The composite staple magazine is simple, easily assembled and saves cost.