Abstract: A ratchet tool device includes a wrench body, a receiving hole and a receiving space opened at a top end of the wrench body, the receiving space axially opened from an inner wall of the receiving hole toward a bottom end of the wrench body, the receiving space communicating with the receiving hole, a ratchet wheel received in the receiving hole, a pawl set having a first pawl, a second pawl and an abutting elastomer, a switching set having a switching member and a positioning member, the switching member assembled to the wrench body and sealing the receiving space, the switching member having a driving block, the first pawl and the second pawl both assembled to the driving block.

Abstract: A ratchet wrench includes a wrench body, a ratchet assembly and a C-ring. The wrench body has a driving head at one end. The driving head has a cavity therein and a retaining groove defined in an inner periphery of the cavity. The ratchet assembly is mounted in the cavity of the driving head. The C-ring is configured to retain the ratchet assembly in place and defines an outer portion and an inner portion. The C-ring has two free ends, and at least one of the two free ends has an oblique face with a pointed edge towards an inside of the C-ring, which is allowed to pry the C-ring moving inward to be detached.

Abstract: The present invention provides a power-factor converter with nonlinear conversion ratio, wherein the power-factor converter includes a first inductor, a second inductor, a rectifier circuit and a switch circuit. The switch circuit is arranged to be switched to form a circuit equivalent to a parallel connection of the first inductor and the second inductor during an inductor-charging-phase for charging the first inductor and the second inductor in parallel by an AC power source, and form a circuit equivalent to a series connection of the first inductor L1 and the second inductor L2 during an inductor-discharging-phase for discharging the first inductor and the second inductor to the rectifier circuit in series.

Abstract: A ratchet wrench includes a wrench body, a ratchet gear, a pawl and a switch assembly. The wrench body has a cavity, a first compartment and a second compartment at a head thereof. The ratchet gear is disposed in the cavity and defines a plurality of ratchet teeth. The pawl is movably received in the first compartment. The pawl defines a central tooth fully engaged with the ratchet teeth, a plurality of first sub teeth and a plurality of second sub teeth. Each of the first sub teeth and the second sub teeth has an inner side face abutting against opposing tooth face of the ratchet gear and an outer side face spaced apart from opposing tooth face of the ratchet gear. The switch assembly is movably disposed in the second compartment for driving the pawl to engage with the ratchet gear.

Abstract: A driving head with an elastic buckle includes a driving head having an engaging room which has a first limiting slot and a second limiting slot, an elastic buckle being assembled with the engaging room and having a connecting segment, a first abutting segment and a second abutting segment, the first abutting segment and the second abutting segment being received in the first limiting slot and the second abutting slot respectively, the first abutting segment having a first abutting portion slightly bent inwardly. Under this arrangement, the first abutting segment and the second abutting segment abut against an outer periphery of a tool bit, so that the tool bit does not depart from the engaging room easily during operation.

Abstract: A ratchet tool device includes a wrench body, a receiving hole and a receiving space opened at a top end of the wrench body, the receiving space axially opened from an inner wall of the receiving hole toward a bottom end of the wrench body, the receiving space communicating with the receiving hole, a ratchet wheel received in the receiving hole, a pawl set having a first pawl, a second pawl and an abutting elastomer, a switching set having a switching member and a positioning member, the switching member assembled to the wrench body and sealing the receiving space, the switching member having a driving block, the first pawl and the second pawl both assembled to the driving block.

Abstract: A driving head with an elastic buckle includes a driving head having an engaging room which has a first limiting slot and a second limiting slot, an elastic buckle being assembled with the engaging room and having a connecting segment, a first abutting segment and a second abutting segment, the first abutting segment and the second abutting segment being received in the first limiting slot and the second abutting slot respectively, the first abutting segment having a first abutting portion slightly bent inwardly. Under this arrangement, the first abutting segment and the second abutting segment abut against an outer periphery of a tool bit, so that the tool bit does not depart from the engaging room easily during operation.

Abstract: A wrench device includes a first handle and a second handle. The first handle has a pivotal connecting segment and a driving head defined at two ends thereof respectively. The pivotal connecting segment has a groove defined around an outer periphery thereof. The second handle has a pivotal connecting recess and a driving part defined at two ends thereof respectively. The pivotal connecting segment of the first handle is pivotally inserted into the pivotal connecting recess of the second handle. The second handle has a side screwed hole opened on a surface therethrough. The side screwed hole communicates with the pivotal connecting recess and corresponds to the groove. A position member is screwed into the side screwed hole. Therefore, when either the driving head or the driving part is broken, the first handle and the second handle can be separated by unscrewing the position member from the side screwed hole.

Abstract: A ratchet wrench includes a wrench head, a ratchet assembly and a bushing. The wrench head is made of metal and defines a cavity therein. The ratchet assembly is disposed in the cavity of the wrench head and has an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head. The bushing is made of a metal with a hardness greater than that of the wrench head and is fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head. Moreover, the bushing has a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity.

Abstract: A steering device for a ratchet screwdriver includes a base. The base has a receiving hole defined therein. Two receiving grooves are defined in the base. A moving slot is comparted from receiving hole. A ratchet rod is partially received in the base. The ratchet rod includes a spindle and a ratchet wheel disposed on the spindle. Two blockers are respectively received in the two receiving grooves. Each blocker has unidirectional teeth formed on one end thereof for selectively engaging with the ratchet wheel. A housing is sleeved on the base. The housing has a protrusion disposed on an interior thereof for inserting into the moving slot.

Abstract: A ratchet wrench includes a wrench body and a ratchet assembly disposed in the wrench body. The ratchet assembly includes a ratchet wheel, a Y-shaped bar, two pawls, a pawl spring and a switch member. The Y-shaped bar has a pair of prongs splayed laterally apart. Each of the pawls is engageable with the ratchet wheel and defines a bore in a lower corner thereof for reception of the respective prong of the Y-shaped bar. The pawl spring is disposed between the pawls. The switch member is partly positioned on an exterior of the wrench body, and operable to drive the Y-shaped bar to direct either one of the pawls to engage with the ratchet wheel.

Abstract: Apparatuses and methods for scanning channels in a television signal receiver. The apparatuses generally include a first acquisition circuit, a second acquisition circuit, and a controller. The first acquisition circuit is generally configured to determine, during a first time period, whether a selected radio frequency channel has a first format and to produce a first acquisition indicator in response thereto. The second acquisition circuit is generally configured to determine, during a second time period overlapping the first time period, whether the selected radio frequency channel has a second format and to produce a second acquisition indicator in response thereto. The controller is generally configured to scan a plurality of radio frequency channels by operating the first acquisition circuit and the second acquisition circuit for each one of the plurality of radio frequency channels. Embodiments advantageously provides for faster scanning and acquisition of television signals in a mixed-format (e.g.

Abstract: A ratchet wrench having easily assembling structure includes a body, a D-head, a loose ratchet, a heart-shaped spring, a disc and a ring. The body has a head portion. The head portion has a through hole. A plurality of teeth is uniformly defined on the through hole. The D-head is rotatably disposed in the through hole and has a connecting member and a threaded member. The loose ratchet is disposed on the D-head. The heart-shaped spring has a closed tip. The disc is disposed on the head portion. A shouldered hole is opened on the disc. A ring is disposed onto the shouldered hole. The ring is disposed onto the shouldered hole. Under this arrangement, a user engages a tool bit with the connecting member of the present invention to lock a bolt by repeatedly rotating the body of the present invention clockwise/counterclockwise.

Abstract: A wrench device with a plurality of driving holes includes a wrench body having two first through holes, each first through hole having an opening end and a positioning end which having two positioning grooves defined thereon, the two positioning grooves corresponding to each other, two actuating member having two driving holes and a positioning block, each driving hole having a first ratchet ring and a second ratchet ring, each positioning block passing through each corresponding first through hole, each positioning block having a positioning slice, a flexible assembly received into the positioning block. Under this arrangement, a user rotates the actuating member relative to the wrench body so as to change the driving hole, so that the user unlocks the screws with different size rapidly and easily.

Abstract: A hand tool with an adjusting structure includes a handle having an assembling space, an axial hole opened at a bottom of the assembling space, a controlling set having an engaging member, the engaging member received into the axial hole, the engaging member having an engaging notch opened thereon, a head member having a pivoting portion defined at one end thereof, the pivoting portion received in the assembling space, a pivoting rod passing through the assembling space and the pivoting portion at one end of the handle, the pivoting portion having a plurality of ratch teeth defined thereon, the engaging member engages with one ratch tooth of the pivoting portion. Under this arrangement, when the user wants to adjust an angle between the handle and the head member, the user rotates the head member relative the handle.

Abstract: An electronic apparatus and an operation method thereof are provided. The electronic apparatus has a sensor module. A space operation mode is enabled when an operation object is detected in a sensor space by the sensor module. A controlling function corresponding to one of a plurality of using spaces divided from the sensor space in which the operation object is located is enabled. Movement information of the operation object is detected by the sensor module, and an operation action corresponding to the enabled controlling function is executed.

Abstract: A ratchet wrench includes a wrench head, a ratchet assembly and a bushing. The wrench head is made of metal and defines a cavity therein. The ratchet assembly is disposed in the cavity of the wrench head and has an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head. The bushing is made of a metal with a hardness greater than that of the wrench head and is fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head. Moreover, the bushing has a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity.

Abstract: A television signal receiver comprises: a tuner, an optional IF conditioner, an IF distortion canceller, and an IF demodulator. The tuner selects one channel from a radio frequency television signal to generate an intermediate frequency signal. The IF conditioner outputs an IF conditioned signal. The IF distortion canceller cancels a signal distortion in the IF signal or the IF conditioned signal to generate an IF distortion-cancelled signal. The IF demodulator demodulates the IF distortion-cancelled signal to output a baseband signal.

Abstract: A wrench with a ratchet device includes a wrench body, a driving set, a cover member and a controlling member. A hole is opened on the wrench body. A receiving space is defined near the hole. An assembling groove is defined near the receiving space. The controlling member is assembled into the receiving space. The driving set has a ratchet and a driving block. The ratchet is assembled into the hole and the driving block is assembled into the receiving space. The driving block abuts against a bottom of the receiving space. The ratchet is engaged with the driving block. The controlling member has a switching member inserted into the assembling groove to move the driving block. Under this arrangement, when the ratchet engages with the driving block, the driving block is stable because the bottom of the receiving space abuts against the driving block.