US 11,981,006 B2
Nail gun punching needle clutch mechanism
Guomin Yan, Hangzhou (CN); and Wenping Liu, Hangzhou (CN)
Assigned to Hangzhou Kelong Electric Devices Co., Ltd., Hangzhou (CN)
Appl. No. 18/255,111
Filed by Hangzhou Kelong Electric Devices Co., Ltd., Hangzhou (CN)
PCT Filed May 12, 2022, PCT No. PCT/CN2022/092394
§ 371(c)(1), (2) Date May 31, 2023,
PCT Pub. No. WO2023/103281, PCT Pub. Date Jun. 15, 2023.
Claims priority of application No. 202210489278.4 (CN), filed on May 7, 2022.
Prior Publication US 2024/0033889 A1, Feb. 1, 2024
Int. Cl. B25C 1/04 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A nail gun punching needle clutch mechanism disposed inside a nail gun shell on which a nail clip, an assembly frame body, and an accumulator are fixed, the nail clip being disposed below the assembly frame body to feed nails into the assembly frame body, and the accumulator being disposed behind the assembly frame body, wherein a clutch mechanism comprises a punching needle driving cam, an inductive optocoupler, a torsion spring, a clutch pawl, and a punching needle; a motor is disposed in the nail gun shell, the motor is triggered to rotate by a trigger on the nail gun shell, the motor is connected to a driving camshaft through a gearbox, and the driving camshaft is used to drive the punching needle driving cam to rotate; a fixed end of the punching needle is fixed on a piston of the accumulator, and a movable end of the punching needle is disposed inside the assembly frame body in a sliding manner to strike a nail inside the assembly frame body, so that the nail is shot out from a nail outlet of the assembly frame body; the punching needle driving cam and the clutch pawl are disposed on two sides of the punching needle separately; punching needle teeth are disposed at an edge of a side, facing the punching needle driving cam, of the punching needle, a plurality of cam pins are disposed on the punching needle driving cam, and the punching needle driving cam engages with the punching needle teeth through the plurality of cam pins to drive the punching needle to slide between an initial position and an energy storage position; an inductive optocoupler blocking edge is disposed at an edge of a side, facing the clutch pawl, of the punching needle to selectively block the inductive optocoupler disposed next to the clutch pawl, and the inductive optocoupler controls start and stop of the motor through electrical signals; the torsion spring is used to twist the clutch pawl, so that the clutch pawl slides along the inductive optocoupler blocking edge; and a notch is formed on the inductive optocoupler blocking edge to fit and clamp the clutch pawl.