A hammer tacker is provided, including a grip portion and a body portion; a magazine, including a rail, at least partially received in the housing, being movable relative to the hosing between a stapling position and a staple-installing position, including an outlet disposed at a front end of the body portion; a biasing mechanism, including a push member movably mounted to the rail and a constant force spring which is rollable, the constant force spring being positionally attached to the rail through a connection portion and located at a front end of the magazine, and the constant force spring being attached to an inner face of the push member, the push member being movable to be correspondingly above or beyond the connection portion; a striking mechanism, mounted to the main body and configured to strike at least one staple installed in the magazine.

A stapler includes a main body, a magazine, a striker, and a driving portion. The main body encloses a receiving space and has an opening at the bottom of the front end thereof. The opening communicates with the receiving space. The magazine is arranged in the main body for receiving staples. The striker is arranged at the front end of the main body and is linearly slidable above the opening vertically. The driving portion is disposed on the main body and is connected to the striker to drive it to move downward to strike the staple out. The striker has a bottom face oriented frontward and downward so that an angle ranged from 3-15 degrees is defined between the bottom face and the horizontal plane.

A powered fastening device is capable of driving a fastener into a work piece and automatically preventing the device from firing until a fastener is located in an appropriate position within the device.

A desktop stapler includes a base portion. A lever is pivotally coupled to the base portion at a pivot point. A gap is defined between the base portion and a distal end of the lever opposite the pivot point. A biasing member is coupled to the lever and biases the lever away from the base portion. A solenoid is operable with a first actuation to move the lever relative to the base portion to decrease the gap and with a second actuation to drive a staple from the lever. A controller is programmed to sequentially initiate the first actuation and the second actuation.

A reload assembly includes a shell housing, a knife carrier, and a one-way collar. The knife carrier is movably positioned about an inner housing portion of the shell housing between retracted and advanced positions and supports a snap-ring. The one-way collar is movably supported about the inner housing portion of the shell housing from a retracted position to an advanced position in response to movement of the knife carrier from its retracted position to its advanced position. The snap-ring is movable with the knife carrier to a position proximally of the one-way collar when the one-way collar is in its advanced position to obstruct movement of the knife carrier back towards its advanced position.

A nailing unit and a nail gun comprising said nailing unit comprises a guide plate, a nail box to mount U nails or T nails, and a nail feeding plate slidably connected to said nail compartment; said nail box is fixedly connected to said guide plate at one end, and forms a nail outlet at the position of connection; said nail feeding plate can push U nails or T nails to the nail outlet; bumps are fixedly provided inboard of said guide plate lengthwise; said bumps and the nail outlet form a nail discharge groove for matching the nailing plate, and suit to different specifications of T nails or U nails.

A staple gun is provided, including: a main body, including a bottom side, and a staple outlet and a notch disposed on the bottom side; a staple magazine, being withdrawably received within the main body, including a track portion and an abutting portion out of the track portion; a lock mechanism, being located at the bottom side, including a pressed member disposed on the main body and located within the notch, the pressed member having a blocking portion movable between a blocking position and a releasing position; wherein when the blocking portion is in the blocking position, the blocking portion is blockably connected with the abutting portion and the staple magazine is non-withdrawable from the main body; when the blocking portion is in the releasing position, the blocking portion is unlocked by the abutting portion and the staple magazine is withdrawable from the main body.

A magazine assembly and a stapler including the same are provided. The magazine assembly includes a main body and a staple-pushing mechanism. The main body has a seat body and at least one rail, the seat body has a first end portion and a second end portion, a connection of the first and second end portions is defined as a moving path, and the at least one rail is disposed on the seat body. The staple-pushing mechanism is arranged on the main body, the staple-pushing mechanism includes a staple-pushing member and a constant force spring, and the staple-pushing member is driven to move toward the first end portion via the constant force spring.

A cap hammer for driving a staple through a cap into a work surface. The cap hammer includes a staple magazine configured to hold a plurality of staples, a cap magazine disposed beneath the staple magazine and configured to hold a horizontal stack of caps, an internal guide body disposed at a forward end of the cap hammer, a cap driver blade disposed within the internal guide body configured to shear a cap from the stack of caps, a staple driver blade disposed within the internal guide body configured to shear a staple from the plurality of staples, and a work contact element disposed at the forward end of the cap hammer and configured to activate the cap driver blade and the staple driver blade when depressed against a work surface.

A stapler is provided, including: a main body, having a front end and a rear end; a magazine, disposed in the main body having an outlet end; a striker, disposed in the main body and located between the front end and the outlet end along the longitudinal direction; a driving mechanism, connected to the striker to optionally drive the striker to strike the staple; a pressing element, located in the main body and between the striker and the outlet end along the longitudinal direction, the pressing element being movable between an original position and a pressed position, the original position being higher than the pressed position, the pressing element having a tendency to stay on the original position, when the pressing element is located on the pressed position, the pressing element presses the staples which are exposed outside the outlet end of the magazine.