The present invention relates to a locking device that prevents the movable plate of the magazine from disengaging from fixed portion of the magazine when the staples are jammed.
A conventional pneumatic stapler is disclosed in
The present invention intends to provide a locking device that is operated by only the hand holding the handle and effectively prevents the movable plate from loosing when the staples are deformed.
The present invention relates to a stapler which comprises a barrel with a nose connected to a front end thereof and a handle connected to the barrel. A trigger is connected to the handle. A magazine is connected between the nose and an connection extension extending from the handle. The magazine 2 includes a fixed portion and a movable plate which is slidbaly engaged with grooves defined in the fixed portion. A port is defined in a side of the second end of the fixed portion of the magazine and the movable plate has a stop which is located in the port. A locking device includes a lever and a biasing member, wherein the lever is a substantially V-shaped member and has an operation end, a contact end and a pivotable end which is located between the operation end and the contact end. The contact end extends through the port and is located beside the stop to stop the movable plate from moving away from the nose. The biasing member is bent to be substantially V-shaped and contacts an inside of a section between the operation end and the pivotable end and an outside of the fixed portion. The contact end is moved away from the stop when pivoting the operation end so that the movable plate can be slidably disengaged from the fixed portion.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to
A magazine 2 has a first end connected to the nose 4 and a second end of the magazine 2 is connected to the connection extension 5 extending from the handle. The magazine 2 includes a fixed portion 20 and a movable plate 21 which is slidbaly engaged with grooves 201 defined in the fixed portion 20. A port 202 is defined in a side of the second end of the fixed portion 20 of the magazine 2. The movable plate 21 has a stop 210 which is located in the port 202.
A locking device 3 includes a substantially V-shaped lever 30 and a biasing member 31. The lever 30 includes an operation end 301, a contact end 303 and a pivotable end 302 which is located between the operation end 301 and the contact end 303. The contact end 303 extends through the port 202 and located beside the stop 210 so as to stop the movable plate 21 from moving away from the nose 4. The biasing member 31 is bent to be substantially V-shaped and contacts an inside of a section between the operation end 301 and the pivotable end 302, and an outside of the fixed portion 20. An extending bar 203 extends laterally from the fixed portion 20 and contacts the inside of the section between the operation end 301 and the pivotable end 302 so as to keep the lever 30 as a V-shaped member. A fulcrum member 204 extends from the fixed portion 20 and contacts against a middle portion of a section between the contact end 303 and the pivotable end 302. Therefore, when the staples are jammed and deformed, the movement of the movable plate 21 is stopped by the contact end 303. The fulcrum member 204 provides a force to push the middle portion of the section between the contact end 303 and the pivotable end 302 to further move the contact end 303 toward the movable plate 21 to ensure that the movement of the movement of the movable plate 21 is stopped.
As shown in
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
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Number | Date | Country | |
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20060273131 A1 | Dec 2006 | US |