Abstract: A screwdriver structure may include a tool rod and a rotating head which are adapted to connect together, and the tool rod is configured to be connected with a handle when the rotating head is separated from the tool rod, so as to use the screwdriver for different situations. The tool rod has a hand-holdable main body which has one end connecting to an extending rod, and a connecting column formed at the other end of the main body has the outer diameter smaller than the main body, and at least a flange is formed on the outer periphery of the connecting column. The extending rod comprises a sleeve at the end thereof to connect a tool head or a bolt.

Abstract: An insulating ratchet driver with pivoting head has: a handle, a spring, a pressing knob, a driving head and a pivoting member. The pivoting member is provided with a cover made of an insulating material. All metal portions of the handle, the pressing knob and the driving head are coated with an insulating layer.

Abstract: An insulating ratchet driver with pivoting head has: a handle, a spring, a pressing knob, a driving head and a pivoting member. The pivoting member is provided with a cover made of an insulating material. All metal portions of the handle, the pressing knob and the driving head are coated with an insulating layer.

Abstract: A ratchet screwdriver may include a handle, a shaft and a ratchet switch device. The handle has a passage axially penetrating through a front end thereof, and a mounting member is mounted on an outer periphery of the front end of the handle. Furthermore, a housing slot formed inside a rear portion of the handle is configured to receive the ratchet switch device. The ratchet switch device comprises a base, a switch button, a driving piece, a positioning member, two engaging blocks, two springs, a ratchet and a locating piece, thereby allowing the shaft to independently rotate relative to the handle in a reversed-working direction. Thus, a user has no need to repeatedly detach the ratchet screwdriver from a screw or re-hold the handle when operating, which is more convenient and labor-saving.

Abstract: A ratchet screwdriver may include a handle, a shaft and a ratchet switch device. The handle has a passage axially penetrating through a front end thereof, and a mounting member is mounted on an outer periphery of the front end of the handle. Furthermore, a housing slot formed inside a rear portion of the handle is configured to receive the ratchet switch device. The ratchet switch device comprises a base, a switch button, a driving piece, a positioning member, two engaging blocks, two springs, a ratchet and a locating piece, thereby allowing the shaft to independently rotate relative to the handle in a reversed-working direction. Thus, a user has no need to repeatedly detach the ratchet screwdriver from a screw or re-hold the handle when operating, which is more convenient and labor-saving.

Abstract: A detachable tool assembly for a screwdriver may include a main body, a sleeve, an extending tube, a first controlling piece, a second controlling piece, an operating unit, and at least a tool rod. The extending tube can be rotated round the main body, so the user can hold the extending tube by hand to provide support when screwing process. Also, it is convenient for user to replace the tool head, while the user has no need to use two hands to remove or place the tool heads, but one hand holding the handle rotates the operating unit to achieve the replacing process.

Abstract: A detachable tool assembly for a screwdriver may include a main body, a sleeve, an extending tube, a first controlling piece, a second controlling piece, an operating unit, and at least a tool rod. The extending tube can be rotated round the main body, so the user can hold the extending tube by hand to provide support when screwing process. Also, it is convenient for user to replace the tool head, while the user has no need to use two hands to remove or place the tool heads, but one hand holding the handle rotates the operating unit to achieve the replacing process.

Abstract: A hand tool includes a handle with a shank and a fixing member is connected to the shank. An isolation layer is coated on the outside of the shank and an annular groove is defined between the isolation layer and the fixing member. A socket has a lip having a positioning member to be engaged with a notch of the fixing member. A guide member is located beside the positioning member. A ring-shaped locking member is connected to the socket and has a recess with which the guide member is engaged. The locking member has two flexible blocks. A positioning member has a protrusion inserted into the through hole of the locking member and has a ridge contacting the lip of the socket. The protrusion has two passages, which are engaged with the two blocks. A bit is inserted into the reception hole of the positioning member.

Abstract: A hand tool includes a handle with a shank and a fixing member is connected to the shank. An isolation layer is coated on the outside of the shank and an annular groove is defined between the isolation layer and the fixing member. A socket has a lip which has a positioning member to be engaged with a notch of the fixing member. A guide member is located beside the positioning member. A ring-shaped locking member is connected to the socket and has a recess with which the guide member is engaged. The locking member has two flexible blocks. A positioning member has a protrusion inserted into the through hole of the locking member and has a ridge contacting the lip of the socket. The protrusion has two passages. The two blocks are engaged with the two passages. A bit is inserted into the reception hole of the positioning member.

Abstract: A ratchet screwdriver includes a handle, a shaft and a ratchet switch device. The shaft is connected to the front end of the handle and a mounting member is connected to the handle so as to be connected with the shaft. The ratchet switch device is located in the chamber in the rear end of the handle and includes a base, a frame, two engaging members, a positioning member, a resilient plate, two positioning pieces, and a ratchet member a switch. The shaft can be replaced by operating the mounting member on the handle. The switch on the rear end of the handle can change the direction of the ratchet member to output torque via the shaft.

Abstract: A torsion adjusting structure of a screwdriver includes an inner tube, a front micro-adjusting rod, a spring, an upper toothed block, a lower toothed block, a stop member, a compressive member, a regulating knob and an interacting member combined together, and the torsion adjusting structure is assembled in the handle of a screwdriver. To adjust the torsion of the screwdriver, an auxiliary tool is inserted in the polygonal recessed groove of the regulating knob to rotate the regulating knob having the graduation and number of a torsion value to be set by the regulating knob aligned to the position of an indication mark on the handle. Thus, the value of the torsion of a screwdriver can conveniently be regulated via the graduations and numbers on the regulating knob. Furthermore, the front micro-adjusting rod can carry out micro-adjustment of torsion.

Abstract: A torque adjustment device for a screwdriver includes a tube located in the handle of the screwdriver and has an adjusting member connected to the first end thereof, a cap is connected to the second end of the tube. A first block and a second block are connected with each other by engagement of the teeth on the two blocks. A spring is biased between the first block and the adjusting member. A link is connected to the cap which pushes a pushing member to move the second block toward the first block when using an assistance tool to rotate the cap. The first block is able to move toward the second block by rotating the adjusting member so as to change the matching force between the teeth of the blocks. The cap has digits and marks to acknowledge the user the setting value of the torque.

Abstract: A torque adjustment device for a screwdriver includes a tube located in the handle of the screwdriver and has an adjusting member connected to the first end thereof, a cap is connected to the second end of the tube. A first block and a second block are connected with each other by engagement of the teeth on the two blocks. A spring is biased between the first block and the adjusting member. A link is connected to the cap which pushes a pushing member to move the second block toward the first block when using an assistance tool to rotate the cap. The first block is able to move toward the second block by rotating the adjusting member so as to change the matching force between the teeth of the blocks. The cap has digits and marks to acknowledge the user the setting value of the torque.

Abstract: A torsion adjusting structure of a screwdriver includes an inner tube, a front micro-adjusting rod, a spring, an upper toothed block, a lower toothed block, a stop member, a compressive member, a regulating knob and an interacting member combined together, and the torsion adjusting structure is assembled in the handle of a screwdriver. To adjust the torsion of the screwdriver, an auxiliary tool is inserted in the polygonal recessed groove of the regulating knob to rotate the regulating knob having the graduation and number of a torsion value to be set by the regulating knob aligned to the position of an indication mark on the handle. Thus, the value of the torsion of a screwdriver can conveniently be regulated via the graduations and numbers on the regulating knob. Furthermore, the front micro-adjusting rod can carry out micro-adjustment of torsion.

Abstract: A ratchet screwdriver includes a handle, a shaft and a ratchet switch device. The shaft is connected to the front end of the handle and a mounting member is connected to the handle so as to be connected with the shaft. The ratchet switch device is located in the chamber in the rear end of the handle and includes a base, a frame, two engaging members, a positioning member, a resilient plate, two positioning pieces, and a ratchet member a switch. The shaft can be replaced by operating the mounting member on the handle. The switch on the rear end of the handle can change the direction of the ratchet member to output torque via the shaft.

Abstract: A hand tool torsion adjustment structure includes a main mechanism, a torsion release mechanism and a micro-adjustment mechanism. The main mechanism is composed of a working rod and a tool handle while the torsion release mechanism is provided with a first engage tooth, a second engage tooth and a spring, and the micro-adjustment mechanism consists of a resisting member, an interacting member and at least one adjusting pinion. The torsion value of the hand tool can quickly be adjusted through the main mechanism and the torsion release mechanism, and the torsion preset value of the hand tool can precisely be fine-adjusted via the micro-adjustment mechanism.

Abstract: A quick-release mechanism for a hand tool includes a center rod, a first sleeve, a second sleeve, and an engaging member. The first sleeve is sleeved on the center rod. The second sleeve is sleeved on the center rod and the first sleeve for moving with the first sleeve. The second sleeve has a recess, a first pushing portion, and a second pushing portion. The engaging member has a protruding portion and an engaging end. The first pushing portion or the second pushing portion abuts against the protruding portion to push the engaging end such that the engaging end engages with a tool bit. When pulling or pushing the first sleeve, the second sleeve moves such that the protruding portion is received in the recess. Simultaneously the engaging end disengages with tool bit.

Abstract: A hand tool torsion adjustment structure includes a main mechanism, a torsion release mechanism and a micro-adjustment mechanism. The main mechanism is composed of a working rod and a tool handle while the torsion release mechanism is provided with a first engage tooth, a second engage tooth and a spring, and the micro-adjustment mechanism consists of a resisting member, an interacting member and at least one adjusting pinion. The torsion value of the hand tool can quickly be adjusted through the main mechanism and the torsion release mechanism, and the torsion preset value of the hand tool can precisely be fine-adjusted via the micro-adjustment mechanism.