Patent Application
20070125821
The present invention relates to a nail gun, more particularly to a structure of arresting mechanism for nail guns for preventing users from shooting the nail gun without nails.
Generally speaking, a prior-art nail gun is composed by a magazine and a nailing device. The magazine accommodates nails and the nailing device provides a trigger for the users to cock and shoot the nails. When there are nails loaded in the nail gun, the nailing device typically shoots at least one nail every time the users cock the trigger. However, when there is no nail in the magazine, the users can still cock the trigger and the nailing device reacts to the users' cocking as normal but no nail be shot. Moreover, the users would usually cock several more times to make sure there is no nail in the magazine and that would harm the nailing device. It is expectable that the life of the nail guns would be shorten if such an ineffective shooting is taken frequently.
The primary objective of the present invention is to provide a solution to the problem that the trigger of a prior-art nail gun can be cocked without nails and causes the nailing device to act ineffectively. The purpose and effect of the present invention is to provide a mechanism that restrains the cocking when there is no nail in the magazine.
The technical measures taken by the invention to achieve foregoing purpose and effect are given below:
A structure of arresting mechanism is applied to a nail gun that is composed by a magazine and a nailing device. The nail gun further comprises a trigger, which is fastened between two pin plates of the nailing device and can be cocked to shoot. The arresting mechanism contains a cotter, which is threaded through the two pin plates and has a head that appears on the pin plate; at least one salient axis part and at least one concave axis part disposed on said cotter, wherein the shaft diameter of the concave axis part is smaller than it of the salient axis part; a spring, with its one end stretching to said pin plate, which houses the cotter and its elastic force affects thereupon; at lease one retaining part disposed on the trigger that allows the salient axis part of the cotter being arrested and retained thereon; a swinging sensing component, which is fastened together with the magazine, with its first end in the location corresponding to the magazine and further extending into the magazine to reach the nail and the second end reaching the head of said cotter.
To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use a preferred embodiment together with the attached drawings for the detailed description of the invention.
Please refer to
a sensing component 20 which can be combined outside the magazine 10. The first end 21 of the sensing component is extended into the magazine 10 to reach the nails and the second end 22 is extended toward the side of the trigger 12. As shown in the figures, a space 13 is disposed outside the magazine 10 for accommodating the sensing component 20. The sensing component 20 further comprises an axial hole 23 which is disposed corresponding to the space 13. A fixing component 24 positions the sensing component 20 by threading through the space 13 and axial hole 23 and allows the sensing component 20 pivoting horizontally on the fixing component 24 like a seesaw. A fastening device 25 is disposed at the first end 21 of the sensing component 20 to combine a tenon 26 which is extended into the magazine 10 via a through hole 15. The tenon 26 provides a inclined plane 261 inside the magazine 10 and when passing by the inclined plane 261, the nails push the tenon 26 outward the magazine 10. Therefore, the first end 21 of the sensing component 20 acts correspondingly and the second end 22 of the sensing component 20 goes contrary.
A cotter 30 which is threaded through the pin plates 16 of the nailing device 11 has a head 31 appears on the pin plate 16. A socket 32 is arranged on the top of the head 31 to contain and hold the second end 22 of the sensing component 20. A spring 33 is disposed between the head 31 and the pin plate 16 to coact with the cotter 30; the cotter 30 compresses the spring 33 when being pushed by the second end 22 of the sensing component 20 and when the pressing force disappears, the spring 33 is resilient and pushes the cotter 30 reposited. The cotter 30 located between the pin plates 16 further comprises at least one salient axis part 35 and at least one concave axis part 37 which are arranged coaxially. Further, the shaft diameter of the concave axis part 37 is smaller than it of the salient axis part 35. Please refer to the figures again; according to the present invention, a first and second salient axis parts 35, 36 are disposed on a cotter 30. A first concave axis part 37 is disposed between the first salient axis part 35 and head 31 and a second concave axis part 38 is disposed between the second salient axis part 36 and the first salient axis part 35.
There is at least one pair of retaining parts 41, 42 disposed on said trigger 12 to allow the first and second salient axis parts 35,36 of the cotter 30 arrested and retained thereon so that the trigger 12 is wedged and can not be cocked by the users. As shown in the figures, there are wing sections 121 equipped at each side of said trigger 12 to allow a pin 122 threading through for fastening the trigger 12 between the two pin plates 16. The foregoing retaining parts 41, 42 are respectively disposed on the top surfaces of the wing sections 121 and are presented in the form of sockets.
Accompanied with the description of the foregoing structure, the principle of the movements for this invention is elaborated as follows:
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In summation of the above description, the present invention enhances the performance of the conventional structure, and further complies with the patent application requirements and is submitted to the Patent and Trademark Office for review and granting of the commensurate patent rights.
While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
