Abstract: A rotatable fastening device disclosed in the present disclosure includes a rotating seat and an impact element. The impact element is one-way pivoted at the rotating seat. The rotating seat is rotated along a rotation axis and detachably connected between a driving tool and an element to be rotated. The weight and kinetic energy of the impact element will provide a one-way tangential impact force around the rotation axis with of rotation.

Abstract: A rotatable fastening device includes a rotatable base and an impact member. The rotatable base rotates along a pivoting axis, and the rotatable base is removably connected with and driving a rotatable member. The impact member is removably connected to an outside of the rotatable base, and the impact member has at least one gravity unit projected outwardly therefrom. The gravity unit is driven by the rotatable base to rotate around the pivoting axis for generating a tangent impact force.

Abstract: A torque socket is provided. The torque socket includes a release mechanism that can be released when a torque thereof reaches a pre-determined value. The torque socket also includes a transmission module. The transmission module includes transmission members and a transmission shaft that are coupled with the release mechanism. The transmission members are cooperated with the release mechanism to determine the transmission shaft transfer torque or not to automatically release the torque.

Abstract: An impact spinning hand tool includes a hollow body, a first lever and a first elastic member. The hollow body includes a first position-limiting structure. The first lever includes a driving end exposed outside the hollow body, a spinning structure and a forcing end contained in the hollow body. The forcing end has a second position-limiting structure that is detachably limited by the first position-limiting structure. The first elastic member is pushed against the forcing end and the first position-limiting structure through two ends thereof. The first lever is located at a first position and presses the first elastic member to store an elastic restoring force when being connected with the hollow body. When the second position-limiting structure is released, the elastic restoring force drives the first lever to move to a second position so as to allow the spinning structure to perform an impact spinning action.

Abstract: A hand tool includes a handle, a press member, a shank body and multiple latch assemblies. The handle is formed with a receiving cavity and a locating hole in communication with the receiving cavity. The press member is movably disposed in the locating hole. The shank body is fitted in the receiving cavity and movable relative to the handle. The shank body is formed with multiple sockets. The latch assemblies are respectively mounted in the sockets. When the shank body is moved, (for example, slid or rotated) relative to the handle to make one of the sockets aligned with the locating hole, the latch assembly latches the shank body with the handle. When pressing the press member, the latch assembly unlatches the shank body from the handle, the shank body is movable relative to the handle.

Abstract: A collapsible torque wrench includes: a shank having a drive head at a front end and two pivoted ends at a rear end; a connection rod, a front end of which being pivotally connected with the first pivoted end; a housing having a tubular body and a casing fixedly disposed on one side of the tubular body, the connection rod being relatively slidably fitted in the tubular body; a torque adjustment mechanism being mounted in the tubular body and including a fixing block, the fixing block being mounted in the tubular body by a plurality of pins; and a stop member received in the casing. A front end of the stop member is pivotally connected with the second pivoted end. The fixing block is easily demounted from the tubular body for replacement.

Abstract: A torque wrench includes a mechanical structure and an electronic structure. The mechanical structure includes a tubular body, a flexible rod, an abutment member, an elastic member, a trip mechanism, an adjustment mechanism and a mechanical scale indication mounted in the tubular body for indicating the set torque of the wrench. The electronic structure includes at least one torque sensor and a display unit. When correcting the torque value of the mechanical structure, a force is applied to the wrench and the torque sensor detects the trip torque value of the wrench. The torque value of the mechanical structure is adjusted to match the torque value detected by the torque sensor so as to eliminate the error of the torque value of the mechanical structure.

Abstract: A wrench with multiple display windows includes a body, two side display window lighting modules and a main display window lighting module. The two side display window lighting modules are illuminated synchronously with each other. The two side display window lighting modules are corresponding to each other. The two side display window lighting modules, are illuminated toward a first optical axis and a second optical axis. The side display window lighting module includes side display window lighting elements configured to generate side display window colors which are turned on or turned off according to the torque. The main display window lighting module is connected to the body and illuminated toward the first optical axis. The main display window lighting module includes main display window lighting elements configured to generate main display window colors which are turned on or turned off according to the torque.

Abstract: An electronic torque wrench with early-warning function includes a main body, a setting unit, a detecting unit, an operation unit, a warning unit and an early-warning program. A working head is disposed at one end of the main body for wrenching a work piece. The early-warning program is set with multiple early-warning times with different warning ranges. The value of the early-warning time is in direct proportion to the set torque value of the wrench. When the operation torque of the wrench reaches the early-warning time, the operation unit urges the warning unit to give a warning.

Abstract: A wrench with quickly angularly adjustable handle includes ahead section and a handle. The head section and the handle are pivotally connected with each other via a first and a second pivoted ends, whereby the handle can be up and down swung relative to the head section. The first and second pivoted ends respectively have a first and a second end faces facing each other. The first end face is formed with an upper and a lower contact sections. The second end face is formed with an upper and a lower abutment sections. The lower abutment section abuts against the lower contact section as a lower dead end of angular displacement of the handle. The upper abutment section abuts against the upper contact section as an upper dead end of angular displacement of the handle.

Abstract: A torque-adjustable torque wrench includes: a tubular body; a flexible bar, an abutment member and a compression spring disposed in the tubular body, a front end of the compression spring abutting against the abutment member; a head section connected with a front end of the flexible bar; an adjustment rod disposed in the tubular body; and an adjustment switch rotatably fitted on a rear end of the tubular body and connected with a rear end of the adjustment rod. The elastic force of the compression spring against the abutment member is adjustable by rotating the adjustment switch. The adjustment switch is only rotatable within a rotational range of one circle, in such rotational range, the ratio of the maximum adjustable torque value to the minimum adjustable torque value of the wrench ranges from 1.2 to 10 times.

Abstract: A bolt tension gauging device is provided. The bolt tension gauging device includes a sensing bolt, a head and a displayer. The sensing bolt is for transmitting a stress signal. The head is for fitting with the sensing bolt. The displayer is connected to the head for displaying the stress signal.

Abstract: A bidirectional ratchet structure includes a base, a first pawl element, a second pawl element, two reset elements, a direction controller and a driving element. The first pawl element, the second pawl element, the direction controller and the driving element are pivotally disposed at the base. The first pawl element includes a first engaging portion. The second pawl element includes a second engaging portion. The first engaging portion and the second engaging portion are pushed to protrude from the base alternatively. The two reset elements are for pushing the first engaging portion and the second engaging portion to protrude from the base respectively. The first pawl element and the second pawl element are surrounded by the direction controller and the driving element. The direction controller is for pressing the first pawl element or the second pawl element toward the base.

Abstract: A wrench with multiple display windows includes a body, two side display window lighting modules and a main display window lighting module. The two side display window lighting modules are illuminated synchronously with each other. The two side display window lighting modules are corresponding to each other. The two side display window lighting modules, are illuminated toward a first optical axis and a second optical axis. The side display window lighting module includes side display window lighting elements configured to generate side display window colors which are turned on or turned off according to the torque. The main display window lighting module is connected to the body and illuminated toward the first optical axis. The main display window lighting module includes main display window lighting elements configured to generate main display window colors which are turned on or turned off according to the torque.

Abstract: A bolt tension gauging apparatus is provided with a bolt assembly including a bolt having a top cavity on a head and a recess on a surface of a threaded shank, and a covering element fitted onto the recess; an electrical resonant transformer on a bottom of the covering member; and a force transducer and transmitter assembly in the recess and electrically connected to the transformer. An electrical resonant transformation device causes the transformer to harvest power from radio frequency electromagnetic waves if a distance between the transformation device and the transformer is sufficiently short. The force transducer and transmitter assembly gauges tension of the bolt and converts same into a signal. The signal is transmitted to a controller and display device for calculating a difference between a predetermined tension and the gauged tension. An alert is generated if the gauged tension is greater than the predetermined tension.

Abstract: A spring compensation structure for a torque wrench includes a body, a compensation component and an engaging head. The body has a first connecting portion, The compensation component is installed on the body and has a compensation distance, wherein one end of the compensation component is abutted on the first connecting portion of the body. The engaging head has a second connecting portion; the second connecting portion is detachably disposed on the body and is abutted on the other end of the compensation component, wherein a distance between the second connecting portion and the first connecting portion is equal to the compensation distance.

Abstract: An electronic torque wrench includes: a shank body, a drive head being connected with a front end of the shank body; a handle having a front handle section and a rear handle section, the front handle section being connected with a rear end of the shank body, a cell room being formed in the front handle section for placing cells therein, a front end of the rear handle section being detachably connected with the rear end of the front handle section; an electronic operation/control device disposed on the shank body; and at least one torque sensor mounted on the shank body. The front and rear handle sections together form the handle for a user to hold. The rear handle section of the handle serves as a cell cap for closing the cell room so as to shorten the length of the wrench.

Abstract: A torque screwdriver includes: a main body having a transverse handle section and a vertical tubular section, the handle section being formed with an internal passage having two cavities respectively formed on two sides of the tubular section; the tubular section being formed with an internal axial space; an operation stem, several ratchets and several recesses being disposed at a top end of the operation stem, each ratchet having a long tooth face and a short tooth face, the long tooth face having a slope smaller than a slope of the short tooth face; the operation stem being mounted in the main body; two elastic abutment assemblies respectively mounted in the two cavities to elastically press two abutment members to elastically contact the operation stem; and at least two support rings disposed between the operation stem and the main body.