An air lock and positioning device for the magazine slide and guideway closure of a fastener driving tool, the advantageous features thereof being a substantial reduction in size accompanied by improved locking action and increased safety, whereby readjustment of the magazine slide and guideway closure is continuously affected during operation so as to assure tightness and consequent accurate guideway dimensions, and all of which is accomplished with few and easily formed parts.
This cartridge for riveting guns comprises an elongated body in the shape of an inverted U which forms a channel for accommodating and guiding the fastener elements and a slidable lid closing the accommodating channel. The lid has a beak which defines the expulsion channel of the fastener elements. Proximate to the end of the elongated body which is opposite to the expulsion channel the cartridge defines a lateral seat for retaining an elastic body defining an abutment for a protrusion of the sliding lid, proximate to the beak.
The present invention provides an improved electric stapler structure, structured to include a housing and a staple slot fixing piece. A driving arm is located at one side within a mount corresponding to staple pushing pieces of the staple slot fixing piece. The staple pushing pieces are used to cause a spring piece of a pressure piece to squeeze a staple. Furthermore, a central bearing base is located at another side of the mount, so that when a stop piece of a hook ring separates from an inverted hook portion of the central bearing base, then a groove and buffering of a stop portion is used to block a protruding piece of a blocking piece, thereby preventing the central bearing base from flicking out in a split second due to the elastic force of a pull piece spring, and thus safeguarding safety of the user during use.
