Abstract: An automatic charging station for an autonomous mobile machine includes a base, a housing, and a signal transmitter. The base is mounted on the ground or on a planar surface. The housing is rotatably mounted on the base, having at least one guide member and a plurality of electrically conductive members on a surface thereof. The electrically conductive members are located on the housing. The signal transmitter is mounted on the housing for transmitting a signal. When the autonomous mobile machine senses the signal transmitted by the transmitter while moving, the autonomous mobile machine moves along a route towards the housing and then forces the guide member to enable the housing to rotate for facing and accommodating the autonomous mobile machine and to further enable the autonomous mobile machine to contact against the housing to have its electrodes in contact with the electrically conductive members for charging.

Abstract: A multi-port jack assembly adapted for power transformers for computers includes a main body. The main body has a plurality of convex connection ports for electrical connection with the power transformers, an electric wire electrically connected with an end of the main body, and a plug electrically connected with a distal end of the electric wire. Thus, the present invention is connectable with the multiple transformers adapted for the computers to enable one-to-multiplicity connection and to further reduce the number of the electric wires.

Abstract: A virtual wall system includes a mobile robotic device having a steering unit for steering itself, a steering control unit connected with the steering unit for controlling the steering of the steering unit, at least one signal transmitter mounted thereon for emitting a signal, and a sonic receiver for receiving a sonic signal; and a virtual wall generator having at least one signal receiver for receiving the signal, at least one sonic transmitter for emitting a sonic signal, and a signal controller for identifying the signal and controlling the emission of the sonic transmitter. While the mobile robotic device is moving, the signal controller controls the sonic transmitter to emit the sonic signal after the signal receiver receives the signal emitted by the signal transmitter and then the sonic receiver receives the sonic signal, enabling the steering control unit to control the steering unit to steer the mobile robotic device.

Abstract: A boosting adaptor for a jack is comprised of a housing, a power input member received in the housing for rotation driven by an external input power, a boosting gear assembly connected with the power input member and having a plurality of gears and rotary shafts for running driven by the power input member and for boosting the input power, and a power output member connected with the boosting gear assembly for connection with the jack and for outputting the boosted input power to the jack. Accordingly, while in cooperative operation with a jack, the boosting adaptor not only enables the laborsaving operation of the jack but also can be connected with an electric tool to enable the convenient operation of the jack.

Abstract: A wheel installation assistant is comprised of a sleeve and an elongated guide section. The sleeve includes an inner diameter which is slightly larger than that of one screw mounted on a vehicle for fitting onto the screw. The sleeve includes a stopping portion inside for contacting against the screw and stopping the screw from further insertion thereinto. The guide section can run through one screw hole of a wheel, having an end connected with the sleeve and the other end extending sidewards for defining a distance from the sleeve in elevation. While applied to the wheel installation, the wheel installation assistant helps the user install the wheel easily and laborsavingly.

Abstract: An automatic charging station for an autonomous mobile machine includes a base, a housing, and a signal transmitter. The base is mounted on the ground or on a planar surface. The housing is rotatably mounted on the base, having at least one guide member and a plurality of electrically conductive members on a surface thereof. The electrically conductive members are located on the housing. The signal transmitter is mounted on the housing for transmitting a signal. When the autonomous mobile machine senses the signal transmitted by the transmitter while moving, the autonomous mobile machine moves along a route towards the housing and then forces the guide member to enable the housing to rotate for facing and accommodating the autonomous mobile machine and to further enable the autonomous mobile machine to contact against the housing to have its electrodes in contact with the electrically conductive members for charging.

Abstract: A ratchet-based adaptor assembly is comprised of a main body, a shell, a ratchet-like driven member, a switch member, and a spring. The shell is covered on the main body, having a neck formed at a side for connection with a wheel replacement wrench. A receiving space is defined between the main body and the shell. The ratchet-like driven member is rotatably mounted in the receiving space, having a plurality of teeth and an adaptor for connection with a rotatable joint of a jack. The switch member includes at least two teeth for engaging the teeth of the ratchet-based driven member, being pivotally mounted in the receiving space but having a part exposed outside the main body for poking by the user's hand. The spring is mounted in the receiving space so as to keep enabling the switch member to engage the driven member.