Gas cylinder type electric nail gun

Abstract

A gas cylinder-type electric nail gun includes a gun base, a cylinder unit connected to the gun base and storing gas, a movable nail-driving unit passing between the gun base and the cylinder unit, and an electric unit and a nail guide unit mounted on the gun base. The gas pressure of the cylinder unit and the electrodynamic force of the electric unit are used to release the nail-driving unit, causing it to fire an inverted nail and then return to its original position. The nail guide unit includes a pivotally mounted nail guide member on the gun base. The nail guide member can move relative to the gun base to a groove surface to block the nail feet, or move away from the groove surface and define a channel for the nail-driving unit to pass through. This improves the smoothness of nailing by limiting the inverted nail and preventing its deformation.

Claims

1. A gas cylinder type electric nail gun, suitable for firing a shaped nail having two nail feet, the gas cylinder type electric nail gun comprising: a gun base including a middle plate and a panel superimposed on the middle plate along an axis, the middle plate having a groove extending along a nailing direction perpendicular to the axis, and two wall surfaces spaced apart along a radial direction perpendicular to the nailing direction and the axis, the panel, the wall surfaces and the groove defining a nailing channel suitable for receiving the shaped nail; a cylinder unit connected to the gun base, storing gas and not communicating with the outside during a firing cycle; and a nail-firing unit movably disposed between the nail-firing channel and the cylinder unit along the nail-firing direction and a retraction direction opposite to the nail-firing direction. An electric unit, mounted on the gun mount, includes a lifting wheel and an electric motor that drives the lifting wheel to rotate. The lifting wheel is disengaged from the nail-driving unit. A nail-guide unit includes a pivotally mounted nail-guide member on the panel. The nail-guide member has a guide surface facing the groove surface and a stop extending from the guide surface toward the groove surface. The nail-guide member is movable relative to the groove surface between a lower limit position and an upper limit position. At the lower limit position, the stop is adjacent to the groove surface and, together with one of the wall surfaces, is adapted to block the nail feet along the radial direction. At the upper limit position, the stop is away from the groove surface and, together with the groove surface, defines a channel for the nail-driving unit to pass through.

2. The gas cylinder-type electric nail gun as described in claim 1, wherein, The other wall of the gun mount is adapted to be spaced apart from the serrated pin along the radial direction. The stop has a first side facing one of the walls and a second side opposite to the first side and facing the other wall. The first side defines a first distance from the one of the walls along the radial direction, and the second side defines a second distance from the other wall along the radial direction that is smaller than the first distance. When the guide pin is in the lower limit position, the stop is adapted to block one of the pin feet, and the other wall is adapted to block the other pin foot.

3. The gas cylinder type electric nail gun as described in claim 2, wherein, The guide pin also has another stop extending from the guide surface toward the groove surface, and the stop blocks along the radial direction on both sides of one of the pin feet.

4. The gas cylinder-type electric nail gun as described in claim 2, wherein, The nailing unit includes a striker that passes through the nailing channel. The striker has a rod portion and a plurality of teeth that extend from the outer surface of the rod portion along the radial direction and are capable of engaging with the lifting wheel. The first spacing is not less than the maximum width of the shaped nail along the radial direction, and the difference between the first spacing and the maximum width of the shaped nail along the radial direction is not greater than 0.1 mm. The second spacing is not less than the maximum width of each tooth from the rod portion along the radial direction to the end point furthest from the rod portion, and the difference between the second spacing and the maximum width of each tooth from the rod portion to the end point furthest from the rod portion is not greater than 0.1 mm.

5. The gas cylinder-type electric nail gun as described in claim 4, wherein, The nail-firing unit includes a piston that passes through the cylinder unit and is connected to the firing pin. The firing pin also has a protrusion that extends from the rod portion along the axis and is adjacent to the end of the rod portion away from the piston. The guide pin is further pushed by the protrusion during the movement of the firing pin along the nail-firing direction, and swings from the lower limit position to the upper limit position.

6. The gas cylinder-type electric nail gun as described in claim 5, wherein, The protrusion also extends along the recycling direction, and its thickness along the axis gradually increases from the end away from the piston toward the piston.

7. The gas cylinder-type electric nail gun as described in claim 5, wherein, The gun mount also has a lower limit surface adjacent to the groove surface and an upper limit surface that is away from the groove surface and spaced apart from the lower limit surface along the axis. When the guide pin is in the lower limit position, it abuts against the lower limit surface. When the guide pin is in the upper limit position, it is adjacent to or abuts against the upper limit surface. Furthermore, as the firing pin moves along the firing pin direction, the guide pin is pushed by the protrusion and swings from the lower limit position to the upper limit position until it abuts against the upper limit surface.

8. The gas cylinder-type electric nail gun as described in claim 1, wherein, The guide pin unit also includes an elastic element. The guide pin has a pivot portion adjacent to one end and pivotally connected to the gun base, and a swing portion opposite to the pivot portion. The swing portion is capable of swinging along the direction of the axis. The elastic element is installed between the pivot portion and the gun base to generate an elastic force for swinging the guide pin toward the groove surface.

9. The gas cylinder-type electric nail gun as described in claim 8, wherein, The gun mount also has a lower limit surface adjacent to the groove surface and an upper limit surface away from the groove surface and spaced apart from the lower limit surface along the axis. When the swing part is in the lower limit position, the swing part abuts against the lower limit surface. When the swing part is in the upper limit position, the swing part is adjacent to or abuts against the upper limit surface. The guide pin is also subjected to the elastic force of the elastic element and swings from the upper limit position to the lower limit position until it abuts against the lower limit surface.

10. The gas cylinder-type electric nail gun as described in claim 1, wherein, The panel has two ear seats spaced apart along the radial direction and an opening formed between the ear seats. The guide pin unit also includes a pivot that passes through the guide pin and is connected to the ear seats, so that the guide pin can be oscillatingly inserted into the opening.

11. The gas cylinder-type electric nail gun as described in claim 1, wherein, When the guide pin is at the lower limit position, the guide surface slopes upward from the end adjacent to the groove surface toward the other end away from the groove surface.

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