The
scriber comprises an outer shell, a mounting groove with an upward opening is formed in the top of the outer shell, a
handle seat is fixed to the front end of the mounting groove, the
handle seat is rotationally connected with the cranking
handle, the rear end of the cranking handle is rotationally connected with a handle knob seat, and the handle knob is fixed to the front end of the handle knob seat. The
crank handle, the handle knob base and the handle knob are all placed in the installation groove, the middle-rear section of the
crank handle is provided with a vertically-through U-shaped groove, the rear end of the U-shaped groove is open, the U-shaped groove allows the handle knob to be placed in, the bottom of the rear end of the
crank handle is provided with a limiting block, the rear end of the installation groove is provided with a limiting groove allowing the limiting block to be clamped in, the rear end of the handle knob base is provided with a first check block, and the front end of the crank handle is provided with an abutting block. When the jiggle bar is in the storage state, the front end of the abutting block makes contact with the rear end face of the first check block. According to the utility model, the purpose of effectively saving space can be achieved.