The ratchet screwdriver is a manual screwdriver. The front end of the handle has a pawl seat and two reverse swingable pawls are arranged on the pawl seat and a shifting member used to control the position and state of the two pawls. The shifting member has two There are two shifting blocks respectively corresponding to two pawls; the rear part of the knife bar is provided with a ratchet sleeve which is sleeved on the pawl seat and engages with at least one of the two pawls.
The ratchet screwdriver uses the effect of the ratchet wheel. The function of the ratchet wheel is to make the screwdriver only rotate in one direction, so that when the screw is screwed, the screw can be tightened by rotating it in the forward direction; when the direction is turned, the screw does not follow the rotation, but the handle rotates in the reverse direction Therefore, it is very convenient to operate, and it is particularly labor-saving. When in use, the screw can be tightened or loosened only by turning the handle at a small angle. This greatly improves work efficiency, reduces labor intensity, shortens working time, and is widely used.