Patent ID: 9185851
Filing Date: 2015-11-17
Classification: A01G

Abstract:
1. A pole saw comprising a saw blade, a long handle provided with one or more stages of poles, and a connecting bracket for attaching the saw blade to a distal end of the long handle, wherein connection and disconnection between the connecting bracket and the long handle are effected by a combination of pin locking and screw locking, the pin locking being effected by a spring-biased latching pin, the screw locking being effected by a dedicated hand screw having a grip head; wherein the connecting bracket includes a securing flat section for use in screw-fixing the saw blade, and a connecting tube for connecting a tubular pole at a distal end of the long handle, the connecting tube of the connecting bracket has a first connecting hole and a second connecting hole provided at two locations spaced apart from each other in a longitudinal direction, the second connecting hole serving as a through hole with an internally threaded rear-side hole provided at the corresponding position on the opposite side of the tube, the first connecting hole serving as a half-through hole with no rear-side hole provided at the corresponding position on the opposite side of the tube, the tubular pole, as with the connecting tube of the connecting bracket, has a first connecting hole and a second connecting hole provided at two locations spaced apart from each other in a longitudinal direction, the second connecting hole serving as a through hole with a non-threaded rear-side hole provided at the corresponding position on the opposite side of the tube, the first connecting hole serving as a half-through hole with no rear-side hole provided at the corresponding position on the opposite side of the tube, the tubular pole has a biasing spring cantilevered inside the tube, and has the spring-based latching pin attached to the biasing spring and spring-biased in the direction protruding outward through the first connecting hole, the connection between the connecting bracket and the long handle is effected by the combination of pin locking and screw locking, the pin locking being effected, in the state where the connecting bracket and the tubular pole are in communication with each other through the first connecting holes and the second connecting holes, as the spring-biased latching pin is automatically engaged with the two first connecting holes which are in communication with each other, the screw locking being effected, in that state, as the dedicated hand screw is manually inserted into the two second connecting holes which are in communication with each other and screwed into the internally threaded rear-side hole, and the disconnection between the connecting bracket and the long handle is effected, in the state where the connecting bracket and the tubular pole are in communication with each other through the first connecting holes and the second connecting holes, by the combination of unlocking operations of manually unscrewing and pulling the dedicated hand screw out of the second connecting holes, and pushing the latching pin engaged with the first connecting holes into the holes to unlock the pin.