| 摘要 |
A chain saw includes a housing, an oil supply system disposed in the housing, a trigger linkage assembly, and a switch controlled by the trigger linkage assembly. The oil supply system includes an oil can and an oil pump assembly connected with the oil can via an oil inlet tube. The trigger linkage assembly includes a switch trigger. The chain saw further includes a pressing member driven by the trigger linkage assembly. When the switch trigger is not activated, the pressing member is located at a first position and can press the oil inlet tube tightly to isolate an oil circuit of the oil supply system. When the switch trigger is pressed down, the pressing member can be driven by the trigger linkage assembly to a second position to release the pressing for the oil inlet tube so that the oil circuit of the oil supply system is allowed to flow. |
| 主权项 |
1. A chain saw, comprising:
a housing; a saw chain; an oil supply system disposed in the housing, the oil supply system comprising an oil can and an oil pump assembly for supplying oil to the saw chain connected with the oil can via an oil inlet tube; a switch for turning on and off the chain saw; a trigger linkage assembly mounted in the housing for controlling the switch, the trigger linkage assembly comprising a switch trigger, a trigger linkage rod driven by the switch trigger, and a torsion spring disposed on a pivot point of the trigger linkage rod, wherein the trigger linkage rod is rotatable relative to the housing, the switch trigger is capable of triggering the switch via the trigger linkage rod, and the trigger linkage rod is biased by the torsion spring in a direction away from a direction of triggering the switch; and a pressing member having a pressing surface positioned on the trigger linkage rod wherein the pressing member faces towards the oil inlet tube and wherein the pressing member is located at a first position to isolate an oil circuit of the oil supply system when the switch trigger is not activated and, when the switch trigger is activated, the pressing member is driven by the trigger linkage assembly to a second position, so that the oil circuit of the oil supply system is allowed to flow therethough. |
