Abstract: A reversible adjustable wrench comprises a handle, which has a fixed jaw and a guiding groove at an end thereof. The fixed jaw has a gap and two cover pieces secured at lateral sides of the fixed jaw to form a chamber having an opening. The chamber has a guiding face therein, which has a stop portion at an end thereof closing to the tip end of the fixed jaw. A movable jaw has an end thereof slidable received in the guiding groove of the handle. An adjusting worm is pivoted at the handle for driving the movable jaw moving toward and away from the fixed jaw.

Abstract: A reversible ratchet wrench comprises a handle having a head portion at an end thereof. The head portion has a through hole, a first chamber and a second chamber. An engaging member is received in the through hole of the handle for free rotating. A pawl is received in the first chamber detachably meshed the engaging member. A switching device comprises an axle member and a turning member at an end of the axle member, and a driving device is made from a flexible wire to form a spiral coupling portion and a curved elastic arm projected from an end of the coupling portion. The coupling portion is received in the second chamber and the elastic arm is projected out to rest against the pawl at the driven portion thereof. The axle member of the switching member is inserted into the second chamber via the opening end of the second chamber for driving the elastic arm to turn, and then the pawl is driven to shift by the elastic arm of the driving device.

Abstract: A ratchet wrench comprises a handle having a head portion at an end thereof. The head portion has a through hole and a chamber, wherein the chamber has a side thereof communicated with the through hole and has a sidewall at the other side thereof. An engaging member has a polygonal hole at central thereof and an annular teeth portion at exterior surface thereof. The engaging member is installed in the through hole of the handle for free rotating. A pawl has a teeth portion at a side thereof. The pawl is received in the chamber of the handle at a side thereof resting against the sidewall in the chamber and has the teeth portion thereof detachable meshed with the teeth portion of the engaging member, and a self-positioned elastic member is made from a flexible wire to form a spiral positioning portion and an elastic arm.

Abstract: A ratchet wrench comprises a handle having a head portion, provided with a through hole, a first chamber and a second chamber. A toothed driving device is installed in the through hole for free rotation. A toothed pawl is received in the first chamber to detachably mesh with the driving device. A switching device has an axle member received in the second chamber for free rotation and a turning member. A U-shaped supporting device, has two parallel extending segments inserted into two holes on the axle member of the switching device, and a spring is provided for driving a contacting segment of the supporting device.

Abstract: A reversible adjustable wrench comprises a handle having a fixed jaw and a guiding slot at an end of the handle. The fixed jaw has two slots at lateral sides thereof, each of which defines two stopping potion at lateral sidewalls thereof. A movable jaw has an end thereof slidable received in the guiding slot of the handle. An adjusting worm is to drive the movable jaw moving toward and away from the fixed jaw. A rotatable device has two body potions received in the slots. A pin passes through the body potions and the fixed jaw for pivoting the rotatable device at the fixed jaw.

Abstract: A reversible adjustable wrench comprises a handle, which has a fixed jaw and a guiding groove at an end thereof. The fixed jaw has a gap and two cover pieces secured at lateral sides of the fixed jaw to form a chamber having an opening. The chamber has a guiding face therein, which has a stop portion at an end thereof closing to the tip end of the fixed jaw. A movable jaw has an end thereof slidable received in the guiding groove of the handle. An adjusting worm is pivoted at the handle for driving the movable jaw moving toward and away from the fixed jaw.

Abstract: A reversible adjustable wrench comprises a handle having a fixed jaw and a guiding slot at an end of the handle. The fixed jaw has two slots at lateral sides thereof, each of which defines two stopping potion at lateral sidewalls thereof. A movable jaw has an end thereof slidable received in the guiding slot of the handle. An adjusting worm is to drive the movable jaw moving toward and away from the fixed jaw. A rotatable device has two body potions received in the slots. A pin passes through the body potions and the fixed jaw for pivoting the rotatable device at the fixed jaw.

Abstract: An adjusting worm for a wrench, which has a core with a hole thereof. An outer periphery of the core is provided with a spirally extending tooth. The tooth has two lateral ends respectively having substantially inwardly recessed arcs. Junctures between top ends of the two arcs and top end of the tooth respectively had a fillet such that the two top corners of the tooth are substantially smooth.

Abstract: An adjustable wrench comprises a frame having a handle, a fixed jaw and a guiding slot. An adjusting jaw has a neck at bottom side thereof. The neck receiving in the guiding slot of said frame whereby the adjusting jaw could slide along said guiding slot. An adjusting worm mounts at the frame for driving the adjusting jaw sliding, and a substantially U-shaped elastic piece mounting at one lateral end of the neck of the adjusting jaw. The U-shaped elastic piece has two suspended against portions respectively locating at two sides of the neck of the adjusting jaw whereby the against portions of the U-shaped elastic piece being against on the sidewalls of the guiding slot respectively.

Abstract: A tool handle includes a tool member disposed on one end and a stem extended from the other end and having a width or a height smaller than that of the handle and having an orifice. A sleeve is engaged onto the stem and includes an aperture aligned with the orifice of the stem. A fastener includes a barrel extended from one end of a blade and engaged into the aperture of the sleeve and the orifice of the stem, and includes a pin extended from the other end of the blade and engaged into the barrel for detachably securing the barrel to the stem of the handle.

Abstract: An adjustable wrench includes a frame, having a handle, a fixed jaw and a track at one end of the handle. An adjusting worm pivoted to the frame for free rotation. An adjustable jaw, having one end received in the track and meshed with the adjusting worm for moving relative to the fixed jaw upon rotating the adjusting worm. Two spaces defined at the two sides of the adjustable jaw within the track. At least one packing device provided in each of the two spaces, having one end fastened to the adjustable jaw and the other end being against the frame.

Abstract: A tool includes a handgrip having a chamber for rotatably receiving a handle and having one or more stop surfaces for engaging with the handle and for limiting the rotational movement of the handle relative to the handgrip. One or more blocks are secured to the handle and rotatably received in the handgrip. A fastener is secured in the handgrip and engaged through an oblong hole of the handle. One or more springs may recover the handle relative to the handgrip. A knob may selectively lock the handle to the handgrip.

Abstract: An adjustable wrench includes a handle having a fixed jaw and a movable jaw disposed on one end and having a shank extended from the fixed jaw and a beam extended from the shank. The shank and the beam each includes one or more weight reducing depressions or apertures or orifices or notches. A sleeve is engaged on the beam and includes one or more studs and projections engaged into the orifices and notches of the beam for allowing the sleeve to be solidly secured to the beam. The beam includes a tapered structure for further securing the sleeve to the beam.

Abstract: A computer joystick having a sliding member for measuring rotations of the joystick's control handle is disclosed. The computer joystick comprises a housing having an upper opening, a vertical control handle having a hand holding part and a ball-shaped knob having a vertical groove installed in it, a knob holding means installed under the upper opening of the housing for rotatably holding the knob of the control handle, a sliding member having an inner end, a supporting means installed in the housing for slidingly supporting the sliding member, and a measuring means for measuring movements of the sliding member wherein the inner end of the sliding member is slidably positioned within the vertical groove of the knob and the sliding member is slidably moved within the supporting means by using the vertical groove of the knob when the control handle is rotated.

Abstract: The present invention is related to a mouse housing structure which includes a main body for providing a firm housing structure of a mouse, a held portion located over the main body for facilitating the mouse to be held with hand, and an angle-adjusting device installed in the main body and coupled to the held portion for conforming an angle of the held portion relative to a surface the mouse is rested on to the holding manner of a user.

Abstract: A wrench includes a handle having a driving head secured on one end and having a handgrip rotatably engaged on the other end for engaging with the hand of the user and for allowing the handgrip to be rotated relative to the handle and for allowing the wrench to be easily rotated and driven by the user. The wrench may include two handgrips rotatably engaged on the end portion of the handle and may include an end cap for retaining the handgrip in place.

Abstract: A mouse structure is provided. The mouse structure includes a shell adapted to receive therein a ball, a receiving device for receiving a photo interrupting device in the shell, and an urging device for urging the photo interrupting device to contact against the ball properly. The probability of shift-detection missing is then reduced.

Abstract: The present invention is related to a cursor control device which includes a ball housing for accommodating therein a ball, a grid wheel device driven by the ball for intermittently passing therethrough a light to control a movement of a cursor, a wheel shaft device engaged with the grid wheel device and driven by the ball for transmitting the grid wheel, and an urging device engaged with the wheel shaft device for urging the wheel shaft device against the ball to assure that the grid wheel device can rotate synchronously with the ball. The present invention utilizes the urging device to exert a force on the wheel shaft device so that the transmission roller device can be urged against the ball to facilitate the close contact between the transmission roller device and the ball rather than be passively contacted by the ball.