Ratchet screwdriver

A ratchet screwdriver comprising:

• a mounting seat having a receiving space defined in a front side thereof, a first slot and a second slot defined in an inside of the receiving space, the first and second slots located symmetrically in opposite directions to each other, a passage defined through the mounting seat, a reception hole defined in a wall of the mounting seat, a block extending from an outside of the mounting seat and located in opposite to the reception hole;
• wherein a first limit portion with an inclined face being defined on a lateral side of the first slot, a second limit portion with an inclined face being defined on a lateral side of the second slot, the first and second limit portions being located symmetrically in opposite directions to each other;
• a driving shaft having a ratchet portion which is located in the receiving space, the ratchet portion having multiple teeth, a section extending from a rear end of the driving shaft and rotatably inserted through the passage, a groove defined in an outer periphery of the rear end of the driving shaft and located beyond the mounting seat, a working end formed on a front end of the driving shaft and adapted to be connected with a driving member, an annular slot defined in the outer periphery of the driving shaft;
• two pawls respectively located in the first and second slots, wherein each pawl having a first lateral portion and a second lateral portion, and having opposite a left lateral side and a right lateral side, a middle portion of a right lateral side of each pawl having an engaging portion with multiple teeth for engaging with the teeth of the ratchet portion;
• the second lateral portion of each pawl having a contact portion, the contact portions of the pawls contacting with the first and second limit portions respectively;
• two springs respectively located in the first and second slots and providing a force to pivot the two pawls to engage with the ratchet portion by their teeth respectively;
• a control member rotatably mounted to the mounting seat and having a mounting hole defined therethrough and the driving shaft rotatably extending through the mounting hole, two control plates extending from an inner periphery of the mounting hole;
• an inner side of the control member having multiple positioning slots;
• wherein when the control member is rotated clockwise, one control plate drives one pawl in the second slot to depart from the ratchet portion, so that the driving shaft is freely rotated counter clockwise relative to the mounting seat;
• wherein when the control member is rotated counter clockwise, the other control plate drives the other pawl in the first slot to depart from the ratchet portion, so that the driving shaft is freely rotated clockwise relative to the mounting seat;
• the control member having a restriction slot defined therein, the block being movable in the restriction slot, wherein when the block contacts one end of the restriction slot, one control plate remove one pawl in the first slot from the ratchet portion, wherein when the block contacts the other end of the restriction slot, the other control plate remove the other pawl in the second slot from the ratchet portion;
• a bead axially and movably located in the reception hole;
• a positioning spring located in the reception hole and biasing the bead outward to be engaged with one of the multiple positioning slots respectively, so as to position the control member at a first position where the driving shaft is freely rotated counter clockwise relative to the mounting seat, a second position where the driving shaft cannot rotate freely relative to the mounting seat, and a third position where the driving shaft is freely rotated clockwise relative to the mounting seat;
• a C-clip engaged with the groove of the driving shaft and restricting the driving shaft from being separated from the front side of the mounting seat, and
• a clipping member engaged with the annular slot of the driving shaft to restrict the control member from being separated from the front side of the mounting seat.