A two-way ratchet screwdriver includes a handle, a main shaft acting on a working end, a ratchet seat, and a reversing seat. Two ends of the ratchet seat are provided with an upper ratchet head and a lower ratchet head, respectively. The upper ratchet head has the same structure as the lower ratchet head and is fixedly connected to the handle. The upper ratchet head is provided with a circle of wheel facing teeth and a circle of ratchet teeth. The wheel facing teeth of the upper and lower ratchet heads are connected by pinions. A periphery of the reversing seat is mounted with at least one set of a forward pawl and an inverse pawl passing through the ratchet seat. The reversing seat is switched to rotate to drive the forward pawl or inverse pawl to act on the ratchet teeth of the upper and lower ratchet heads.

In a bi-directional screwdriver, the screwdriver may include a handle, a main housing, and a gearing assembly, which is mounted on the idle gear axle on the transmission seat and is fitted between the driving gear and the driven gear for transferring motion. When the grip ring is gripped and the handle is rotated to rotate the driving gear, the driving gear may rotate the driven gear in a reverse direction through the idle gear. The screwdriver may include a reversing means which can include a reversing member, a pawl, and a direction collar, in which the driving gear, the driven gear, and the transmission seat are all sleeved on the main housing. The reversing member may be sleeved into the main housing and able to rotate the main housing. The direction collar may engage with and rotate the reversing member, causing a change of output direction.

In a bi-directional screwdriver, the screwdriver may include a handle, a main housing, and a gearing assembly, which is mounted on the idle gear axle on the transmission seat and is fitted between the driving gear and the driven gear for transferring motion. When the grip ring is gripped and the handle is rotated to rotate the driving gear, the driving gear may rotate the driven gear in a reverse direction through the idle gear. The screwdriver may include a reversing means which can include a reversing member, a pawl, and a direction collar, in which the driving gear, the driven gear, and the transmission seat are all sleeved on the main housing. The reversing member may be sleeved into the main housing and able to rotate the main housing. The direction collar may engage with and rotate the reversing member, causing a change of output direction.

A ratchet screw driver includes a holder, a toothed wheel, two pawls, a direction switch and a ring. The toothed wheel, the pawls and the ring are inserted in the holder. The pawls are biased from each other. Each of the pawls includes a boss and a toothed face. The direction switch is connected to the holder, movable between two positions relative to the holder, and formed with two bosses. The ring includes two cutouts and two hooks. The cutouts receive the bosses so that the ring is rotatable with the direction switch. One of the hooks is engaged with the boss of one of the pawls to firmly engage the toothed face of the remaining one of the pawls with the toothed wheel when the ring is moved to one of the positions by the direction switch.

A ratchet screw driver includes a holder, a toothed wheel, two pawls, a direction switch and a ring. The toothed wheel, the pawls and the ring are inserted in the holder. The pawls are biased from each other. Each of the pawls includes a boss and a toothed face. The direction switch is connected to the holder, movable between two positions relative to the holder, and formed with two bosses. The ring includes two cutouts and two hooks. The cutouts receive the bosses so that the ring is rotatable with the direction switch. One of the hooks is engaged with the boss of one of the pawls to firmly engage the toothed face of the remaining one of the pawls with the toothed wheel when the ring is moved to one of the positions by the direction switch.

A screwdriver rotation structure includes a main body, a control member, a driving member, multiple first rolls, and multiple second rolls. The main body has multiple first recesses and multiple first pillars. Each of the first recesses has a first face. Each of the first pillars has two second faces, two third faces, and a first pivot portion. The main body has multiple second pivot portions. The control member has multiple third pivot portions and multiple second pillars. Each of the second pillars has a fourth face, a fifth face, and a fourth pivot portion. The control member has a fifth pivot portion and a mounting portion. Each of the first rolls is received in one of the first recesses. Each of the second rolls is received in one of the first recesses.

A screwdriver rotation structure includes a main body, a control member, a driving member, multiple first rolls, and multiple second rolls. The main body has multiple first recesses and multiple first pillars. Each of the first recesses has a first face. Each of the first pillars has two second faces, two third faces, and a first pivot portion. The main body has multiple second pivot portions. The control member has multiple third pivot portions and multiple second pillars. Each of the second pillars has a fourth face, a fifth face, and a fourth pivot portion. The control member has a fifth pivot portion and a mounting portion. Each of the first rolls is received in one of the first recesses. Each of the second rolls is received in one of the first recesses.

A screwdriver rotation structure includes a main body, a control member, a driving member, multiple first rolls, and multiple second rolls. The main body has multiple first recesses and multiple first pillars. Each of the first recesses has a first face. Each of the first pillars has two second faces, two third faces, and a first pivot portion. The main body has multiple second pivot portions. The control member has multiple third pivot portions and multiple second pillars. Each of the second pillars has a fourth face, a fifth face, and a fourth pivot portion. The control member has a fifth pivot portion and a mounting portion. Each of the first rolls is received in one of the first recesses. Each of the second rolls is received in one of the first recesses.

A screwdriver rotation structure includes a main body, a control member, a driving member, multiple first rolls, and multiple second rolls. The main body has multiple first recesses and multiple first pillars. Each of the first recesses has a first face. Each of the first pillars has two second faces, two third faces, and a first pivot portion. The main body has multiple second pivot portions. The control member has multiple third pivot portions and multiple second pillars. Each of the second pillars has a fourth face, a fifth face, and a fourth pivot portion. The control member has a fifth pivot portion and a mounting portion. Each of the first rolls is received in one of the first recesses. Each of the second rolls is received in one of the first recesses.

An external tooth type ratchet screwdriver includes a handle and a ratchet head, the handle is provided with a ratchet seat, a first pawl and a second pawl; the ratchet head is of a round-bar shape and passes through the center of the ratchet seat; the middle part of the outer surface of the ratchet head is provided with teeth; one end of the inner circle of the first pawl is provided with a ratchet teeth structure; the second pawl has the same structure with the first pawl; the end surface of the ratchet seat is eccentrically provided with a circle of annular groove, and one end of the annular groove is cut off, and arc-shaped barrier strips are oppositely arranged on a cutoff; installation seats are formed between the wall of the ratchet seat and the arc-shaped barrier strips; a reversing cover is clamped outside the ratchet seat.