Sawing height instantly adjustable handsaw

Abstract

The invention discloses an arm saw with its saw cutting height adjusting instantly, which comprises the arm saw frame that is formed by the antecurvature, the bending girder, the handle, the rocking cover and the backwardcurvature. The antecurvature and the backwardcurvature through their pull nails to equip the saw blades; the slot-heads at the two ends of the bending girder can be embedded in the slot holes on the antecurvature and the backwardcurvature; through the circumvolving of the slot-head adjust the height and direction of the saw cutting; as encountering the dead angle and the limitation of the height, the invention can also work. The backwardcurvature is at the inner side of the rocking cover, and the handle, the rocking cover and the backwardcurvature are equipped the active frame to fast load and unload the saw blade; the active node frame comprises the front, the back connecting boards and the active bolt to change the saw blade in time. The rocking cover through the revolving of the main supporting point and the transition of the side supporting point controls the precise displacement of the backwardcurvature.

Description

technical field [0001] The invention relates to a hand saw, in particular to a hand saw that can change the saw blade safely and quickly at any time and anywhere, and can also facilitate sawing when encountering a small dead angle or a position with limited height, and can instantly adjust the sawing height. Background technique [0002] The hand saw is a hand tool that is commonly used in mechanical repairs and assembly when sawing materials. The traditional hand saw is made of steel. There is a screw and nut at one end of the hand saw to tighten and loosen the saw blade. That is, when the saw blade is not sharp or broken and needs to be replaced, the nut needs to be loosened to remove the saw blade Take it off, then install a new saw blade, and tighten the nut. Therefore, when changing the saw blade, it is troublesome and time-consuming to loosen and tighten. [0003] The date of application is that " a kind of saw frame " (notification number is CN2508920Y) of Chinese u...

AI Technical Summary

Problems solved by technology

Its structure is simple, easy to use, and time-saving, but a little carelessness when replacing the saw blade can cause the saw blade to fall off, fall and hurt people, or fall into the equipment to cause mechanical failure, and the shape of the curved beam of the hand saw is an outer arch If there is a small dead angle or a position where the height is limited, the sawing height cannot be adjusted in time and cannot work normally.

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