RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a nail gun, and more particularly to a nail gun by which a nail is discharged by the force of an explosive for the purpose of fastening pieces or parts together.
BACKGROUND OF THE INVENTION
As shown in FIGS. 5–8, a prior art nail gun comprises a body 60, which is provided with an upright slot 62 to accommodate an explosive array 61 in such a manner that the explosive array 61 can be caused to move up and down along the upright slot 62 by a cooperative effort of a movable arm 63, a link rod 64 and an actuation rod 65. The movable arm 63 is pivoted at a pivoting point 66 with a barrel 67 and is provided with a nail loading hole 68. As the movable arm 63 is swivelled forward for an angle of 180 degrees, the movable arm 63 is aligned with the barrel 67 so as to enable the nail to be loaded in the barrel 67 by means of a slide seat 69 which is pivoted with the movable arm 63. The link rod 64 and the actuation rod 64 are disposed in a horizontal chamber 70 such that the link rod 64 is pivoted with the movable arm 63, and that an inverted hook 652 of the actuation rod 65 is retained in one of the retaining slots 611 of the explosive array 61. The actuation rod 65 is provided with a V-shaped through hole 653 in which a pin of the link rod 64 is movable received. Each time when a nail is discharged, the movable arm 63 must be swivelled forward and backward, so as to complete the loading of another nail and to position another explosive cavity 612 of the explosive array 61. It is therefore readily apparent that the prior art nail gun is inefficient at best.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a nail gun which is free of the deficiencies of the prior art nail gun described above.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 shows an exploded perspective view of the preferred embodiment of the present invention.
FIG. 2 shows a perspective view of the preferred embodiment of the present invention.
FIG. 3 shows a sectional schematic view of the preferred embodiment of the present invention at work.
FIG. 4 shows another sectional schematic view of the preferred embodiment of the present invention at work.
FIG. 5 shows an exploded perspective view of a prior art nail gun.
FIG. 6 shows a perspective view of the prior art nail gun.
FIG. 7 shows a sectional schematic view of the prior art nail gun at work.
FIG. 8 shows another sectional schematic view of the prior art nail gun at work.
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1–4, a nail gun embodied in the present invention comprises a body 10, which is provided with an upright slot 11 to accommodate an explosive array 20. The explosive array 20 is capable of moving up and down along the upright slot 11 and is formed of a plurality of explosive cavities 21 arranged at intervals, and a plurality of retaining slots 22 arranged at intervals. The body 10 is provided with a nail firing tube 30, and a nail magazine 40 connected to the nail firing tube 30.
The body 10 is further provided with a horizontal slot 12 perpendicular to and in communication with the upright slot 11. The horizontal slot 12 is used to dispose a link rod 51, an actuation rod 52, and a recovery spring 53. The link rod 51 is provided with a contact portion 511, which comes in contact with a contact surface 31 of the nail firing tube 30, thereby enabling the link rod 51 to move along with the nail firing tube 30. The recovery spring 53 is retained between one end of the link rod 51 and a fixation pin 13 of the body 10. The recovery spring 53 serves to provide the link rod 51 with a recovery force. The actuation rod 52 is pivoted at a pivoting point 521 in the horizontal slot 12 such that a retaining hook 522 of the actuation rod 52 is retained in one of the retaining slots 22 of the explosive array 20. The actuation rod 52 is provided in the midsegment with a V-shaped guide hole 54 which has a front end 541, and a rear end 542 located at a higher level than the front end 541. Located between the link rod 51 and the actuation rod 52 is a pin 55, which is movably received in the guide hole 54.
As illustrated in FIG. 3, the nail firing tube 30 is forced to move inward by pressing the nail firing tube 30 against an object or wall. Meanwhile, the link rod 51 is moved inward to stretch the recovery spring 53. The pin 55 moves toward the rear end 542 of the guide hole 54. As a result, the actuation rod 52 swivels on the pivoting point 521 thereof such that the retaining hook 522 of the actuation rod 52 is retained in another one of the retaining slots 22 of the explosive array 20.
As illustrated in FIG. 4, when the nail firing tube 30 is relieved of the pressure, the link rod 51 is caused by the recovery force of the recovery spring 53 to return to its original position. Meanwhile, the pin 55 moves back to the front end 541 of the guide hole 54. The retaining hook 522 of the actuation rod 52 moves upward, thereby resulting in an upward movement of the explosive array 20.
The nail gun of the present invention is provided with a simple and efficient trigger mechanism. In another words, the firing of a nail by the nail gun of the present invention is attained simply by pressing the front end of the nail firing tube 30 against an object or wall, and then by moving the front end of the nail firing tube 30 away from the object or wall.
The embodiment of the present invention described above is to be regarded in all respects as being illustrative and nonrestrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scope of the following claim.