Protection lock structure for push-button cutter and push-button cutter

A protection lock structure for a push-button cutter, the push-button cutter comprises a housing, a push button, a blade, and an adapter piece, the blade being arranged inside the housing, the adapter piece being connected to one side of the blade and being located inside the housing, one side of the push button being connected to the adapter piece, and the push button being at least partially exposed outside the housing, wherein

• the protection lock structure comprises a lock button and a limiting portion arranged on the adapter piece, the lock button is provided with a locking portion, the lock button is mounted on the housing, the lock button at least forms a first relative position and a second relative position with the housing, in the first relative position, the locking portion is abutted against the limiting portion, and in the second relative position, the locking portion is separated from the limiting portion.