Abstract: A power tool, which includes a handle portion and a housing; a chuck disposed in front of the housing, and the chuck that is selectively operated in one of a working mode and a chucking mode. The power tool further includes a driving device which drives the chuck to axially move between a first position and a second position.

Abstract: A nailer device has a housing containing a motor and a striking device arranged in a compact manner. A transmission mechanism is mounted in the housing for translating the rotating motions of the motor into the periodic impact motions upon the striking device. The transmission mechanism includes an impact assembly which imparts the periodic impact motions upon the striking device.

Abstract: A blade clamping device comprises a main body which includes two opposited sidewalls and a base plate connected therebetween for defining a cavity for receiving a blade therein. A fixing device mounted between the two sidewalls. A pivot lever is pivotly mounted on the main body about an axis for driving the fixing device to fix or release the blade. A spring is biased between the main body and the pivot lever, which can hold the pivot lever in a predetermined position at which the fixing device clamps the blade tightly. The blade clamping device of the present invention can be kept in the position where the blade is released such that the blade can be easily detached or inserted as required. Furthermore, the operation becomes convenient and easy because of the short moving distance of the operation handle when an operator turns round the pivot lever to fix or release blade.

Abstract: A nailer device has a housing containing a motor and a striking device arranged in a compact manner. A transmission mechanism is mounted in the housing for translating the rotating motions of the motor into the periodic impact motions upon the striking device. The transmission mechanism includes an impact assembly which imparts the periodic impact motions upon the striking device.

Abstract: An optoelectronic distance measuring device includes a frequency modulator generating a high-frequency modulation signal, an emitter emitting a high-frequency modulated measuring beam to an object to be measured, an avalanche photodiode receiving a reflected measuring beam from the object and generating a corresponding high-frequency reflected measuring signal, and a signal generating device generating a high-frequency mixer signal connected with the avalanche photodiode. The high-frequency mixer signal is applied to the avalanche photodiode and mixed with the high-frequency reflected measuring signal to provide a low-frequency measuring signal which contains phase information for calculating a distance to be measured. In this manner, measuring error due to phase drift is eliminated without the need for an extra internal reference optical path and an mechanical switching device so that the structure of the device is simplified significantly and manufacturing costs are reduced.

Abstract: An electric sanding machine has a housing with a drive device disposed therein, a base plate disposed under the housing, and a driven shaft for driving the base plate. A sanding device is attached to the base plate. The housing has a drive device housing part substantially perpendicular to the base plate and a grip housing part substantially parallel to the base plate. A cross section of the housing in a vertical direction is substantially L-shaped. The drive device is disposed in the drive device housing part while the driven shaft is located in the grip housing part so that the drive device is departed from the driven shaft in a radius direction of the driven shaft. With this arrangement, the sanding machine is provided with stronger power and has a smaller contour size which may be controlled more effectively.

Abstract: A nailer device has a housing containing a motor, a gear box, a transmission mechanism, and a striking rod. The motor, the gear box, and the transmission mechanism cooperate to cause the striking rod to be moved back and forth. The striking rod has a peripheral outer surface and a longitudinal axis and the striking rod and the gear box are connected through a sliding connection structure which allows the striking rod to be moved along its longitudinal axis and which prevents the striking rod from rotating around its longitudinal axis.

Abstract: A nailer device has a housing containing a motor and a transmission mechanism. The housing has a nozzle portion with a striking rod for striking a nail arranged therein, the striking rod being moved in a reciprocating manner. A rotating shall is mounted in the housing and the rotating shaft is coupled to the output shaft of the motor through the transmission mechanism. An impact member surrounds the rotating shaft and is moved with the rotating shaft. Corresponding slots are formed on the rotating shaft and the impact member respectively and mate with each other with engagement members being contained in the corresponding slots.

Abstract: An electrical device, such as a nailer device, has a motor and a gear housing containing a transmission mechanism. The transmission mechanism is coupled to the motor for driving an impact member. The transmission mechanism includes a shaft having a through-hole wherein a first opening of the through-hole is communicated with the interior of the gear housing and a second opening of the through-hole is communicated with an exterior of the gear housing.

Abstract: A compact, power-saving laser distance finder with high accuracy is disclosed having a laser generating device, a collimating lens in an emitting end direction of the laser generating device, a receiving lens, an optoelectronic detector, a reflective member rotatably mounted on an optical path of the collimating measuring beam via a rotating shaft and being capable of rotating to a blocking position and an non-blocking position. There is a transmission part on one end of the reflective member, the transmission part has an interval apart from an axis of the rotating shaft and engages with teeth of a worm driven by motor. When the reflective member reaches a predetermined position, it can be kept at that position through self-locking of the engagement between the worm's teeth and the transmission part without supplying power to the motor continuously, and a distance measuring is carried out and accuracy ensured.

Abstract: A power tool has a motor, a clutch device for adjusting torque, a percussion device which has two cam discs, and two adjusting rings for selectively setting four operating modes including a “screwdriving” operating mode, an “impacting” operating mode, a “drilling” operating mode and a “percussion drilling” operating mode. One of the two adjusting rings is a torque adjusting ring operable to select one of the “screwdriving” operating mode, the “impacting” operating mode, and the “drilling” operating mode while the other one of the two adjusting rings is a percussion ring operable to selectively set “percussion drilling” operating mode.

Abstract: An optoelectronic distance measuring device includes a frequency modulator generating a high-frequency modulation signal, an emitter emitting a high-frequency modulated measuring beam to an object to be measured, an avalanche photodiode receiving a reflected measuring beam from the object and generating a corresponding high-frequency reflected measuring signal, and a signal generating device generating a high-frequency mixer signal connected with the avalanche photodiode. The high-frequency mixer signal is applied to the avalanche photodiode and mixed with the high-frequency reflected measuring signal to provide a low-frequency measuring signal which contains phase information for calculating a distance to be measured. In this manner, measuring error due to phase drift is eliminated without the need for an extra internal reference optical path and an mechanical switching device so that the structure of the device is simplified significantly and manufacturing costs are reduced.

Abstract: A laser leveling device as disclosed in the present invention comprises a body and a power source. The body has a cavity for containing a laser module which is movable between a first position and a second position. When in the first position, the laser module is located within the cavity and is not connected to the power source; and when in the second position, the laser module is located outside of the cavity and the laser is electrically connected to the power source to emit a visible laser beam.

Abstract: A power tool has a base assembly and a housing which is vertically movable relative to the base. The housing has a plurality of positioning components. A cutting depth adjustment mechanism is mounted on the base assembly and includes a support bracket and a sliding piece. The sliding piece is horizontally movable relative to the support bracket between a first position and a second position. When in the first position, the sliding piece is engaged with one of the positioning components and, when in the second position, the sliding piece is disengaged with the positioning components.

Abstract: A nailer device has a housing containing a motor and a striking device arranged in a compact manner. A transmission mechanism is mounted in the housing for translating the rotating motions of the motor into the periodic impact motions upon the striking device. The transmission mechanism includes an impact assembly which imparts the periodic impact motions upon the striking device.

Abstract: A sliding miter saw having a base for supporting a workpiece, a rotatable table mounted on the base, a transmission frame on one side of the table, a motor disposed on one end of the transmission frame, and a blade driven by the motor. Two rows of rollers are disposed on a bottom of the table and a sliding block adapted to cooperate with the two rows of rollers is disposed between the two rows of rollers. One end of the sliding block is hinged to the transmission frame.

Abstract: A power tool having a hollow base member and a motor housing vertically, movably received in the base member. A vertical toothed bar is fixed on an outside wall of the motor housing. A gear shaft is horizontally mounted on the base member and a worm shaft is vertically mounted on the base member. A link gear that engages the toothed bar and a lock gear are both mounted on the gear shaft. The lock gear is axially movable between a first position and a second position and has a tendency to be in the first position. When the lock gear is in the first position, the lock gear engages a worm mounted on the worm shaft and is circumferentially fixed relative to the link gear. When the lock gear is in the second position, the lock gear disengages the worm and is rotatable relative to the link gear.

Abstract: An electric sanding machine has a housing with a drive device disposed therein, a base plate disposed under the housing, and a driven shaft for driving the base plate. A sanding device is attached to the base plate. The housing has a drive device housing part substantially perpendicular to the base plate and a grip housing part substantially parallel to the base plate. A cross section of the housing in a vertical direction is substantially L-shaped. The drive device is disposed in the drive device housing part while the driven shaft is located in the grip housing part so that the drive device is departed from the driven shaft in a radius direction of the driven shaft. With this arrangement, the sanding machine is provided with stronger power and has a smaller contour size which may be controlled more effectively.