Abstract: A printer and its blade withdrawal mechanism, comprising: a fixing board, used for fixing a down cutter, the lower end of the fixing board can be pivotally installed on an installing support; a balance unit; a locking unit; and a manipulation unit, which is installed on the installing support, located at one side of the combination of the fixing board and the down-cut blade, and can move downward by two segment travels under the effect of external force, at the first segment travel, it can act on the balance unit, while at the second segment travel, it can act on the locking unit. The invention can simplify the handling of the faults such as paper jam, and improve the handling efficiency.

Abstract: A printer and its blade withdrawal mechanism, comprising: a fixing board, used for fixing a down cutter, the lower end of the fixing board can be pivotally installed on an installing support, and lower end of the installing support can be pivotally installed on a main body; a balance unit, which is installed on the installing support, and can act on the combination of the fixing board and the down-cut blade from front and rear, so as to enable the combination to be at non-pivotal state or at blade withdrawal state of pivoting by certain angle backward; a locking unit, for enabling the installing support to be at the locking state of being connected to the main body non-pivotally or at the open state of pivoting by certain angle forward; and a manipulation unit, which is installed on the installing support, located at one side of the combination of the fixing board and the down-cut blade, and can move downward by two segment travels under the effect of external force, at the first segment travel, it can act on