Abstract: A wheel includes a metal rim, an electrically conductive hub, a thermoelectric device, and a battery. The metal rim is exposed out of a circumference surface of the wheel for contacting with the ground. The thermoelectric device is connected between the metal rim and the electrically conductive hub for generating electric energy using temperature difference between the metal rim and the electrically conductive hub. The battery has two electrodes connected to the metal rim and the electrically conductive hub, respectively. The battery is configured for collecting electric energy generated by the thermoelectric device.

Abstract: A wheel assembly includes a shaft and a pair of wheels rotatably connected to opposite ends of the shaft. Each wheel includes an inner cover, an outer cover connected to the inner cover, and a steering member sandwiched between the inner cover and the outer cover. The steering member includes a motor, a rotating plate, at least two elastic elements equidistant from each other around the inner cover, and at least two pawls rotatably connected to the outer cover. The motor is fixed on the inner cover and includes a rotating shaft. The rotating plate is fixed to the rotating shaft and is driven by the motor to rotate. Each elastic element connects the rotating plate to each pawl. Each pawl extends out of the inner cover by rotation of the rotating plate, thereby changing the radius of the wheel.

Abstract: The present disclosure provides a motor overload protection device that includes a driving gear, a loading wheel, and at least one protecting gear unit rotatably fixed to the loading wheel. The loading wheel defines a central through hole for rotatably receiving a rotor of a motor. The driving gear is fixed on the rotor. The at least one protecting gear unit is rotated by the rotor. A resistance between the at least one protecting gear unit and the loading wheel is predetermined. When the load on the loading wheel is less than or equal to the maximum load of the motor, the resistance keeps the loading wheel and the at least one protecting gear unit together rotating around the rotor of the motor. When the load is greater than the maximum load of the motor, the at least one protecting gear unit rotates relative to the loading wheel.

Abstract: A time display device comprises a dial plate; a plurality of time indication portions set in the dial plate; and a plurality of groups of luminophors. Each of the groups of luminophors corresponds to a time indication portion, and comprises a first luminophor, a second luminophor, and a third luminophor. A clock unit provides current time information. A first switch unit electrifies/powers off the first luminophor. A second switch unit electrifies/powers off the second luminophor. A third switch unit electrifies/powers off the third luminophor. A hour hand controlling module obtains a hour value, and controls the first switch unit to electrify the first luminophor of the time indication portion corresponding to the obtained hour value. A minute hand controlling module obtains the current minute value, and controls the second switch and/or the third switch unit to electrify the corresponding luminophor.

Abstract: An energy saving lamp is provided. The energy saving lamp includes a main body, a circuit, an adjusting member, and a shielding device. The circuit includes a plurality of parallel loops, each parallel loop includes at least one light emitting member and a pair of open ends, the adjusting member is rotatablely connected to the main body; the shielding device is fixed on the adjusting member; a conductive rod is fixed at the shielding device, and is received in an accommodating hole of the main body; when the adjusting member turns under a twisting force, it drives the shielding device to turn, the conductive rod moves in the accommodating hole to contact different number of the pairs of open ends to close the loops of the open ends, the light emitting members in the closed loops are thus turned on.

Abstract: A light emitting diode (LED) base clock includes a clock face and twelve groups of LEDs. The twelve groups of LEDs are arranged as an hourly indicator. Each group of LEDs are arranged as a minutely indicator. The clock further comprising a time signal generator configured for generating time signals and selectively drive corresponding LEDs to light using the time signals to display the time and keep time.

Abstract: A floating lamp system is provided. The system includes an object having a first inner wall and a second inner wall. A first conductive element is mounted on the first sidewall and electrically connected to the anode of a power source. A second conductive element is mounted on the second wall and electrically connected to the cathode of the power source. The system further includes a floating lamp having a balloon and a lighting element mounted in the balloon. An anode contact point is mounted on the top of the balloon and a cathode contact point is mounted on the bottom of the balloon. The lighting element is electrically connected to the anode contact point and the cathode contact point. When the floating lamp floats, causing the anode contact point to contact with the first conductive element, the lighting element is lit up.

Abstract: A hinge assembly includes a first connecting member, a second connecting member, a first fixing member, and a second fixing member. The first fixing member can extend through the first connecting member and the second connecting member. The first fixing member includes a first magnet. The second fixing member can extend through the second connecting member and be received in the first connecting member. The second fixing member includes a second magnet. The first fixing member is engaged with the second fixing member under the magnet force between the first magnet and the second magnet.

Abstract: A time display device and a time display method are provided. The time display method implemented by the time display device, the method comprising, providing a current time information; controlling the first stepper motor to drive the light source to rotate an angle, then the emitted light representing as an hour hand; determining the current emitted reflector according to hour value in the second time information; determining a rotation angle of the reflector according to hour value, minute value in the second time information and a calculation formula; and controlling the second stepper motor group to drive the reflector to rotate the rotation angle, thus emitted light reflected by the reflector points to a corresponding minute marker, the reflected light representing as a minute hand.

Abstract: A driving device includes a motor, a rotatable shaft rotated by the motor, a driven member, a magnetic material spring, and a power source. The driven member sleeves on an end of the rotatable shaft, and includes an end surface with at least one latching groove defined thereon. The magnetic material spring sleeves the rotatable shaft, and includes a first end fixed to the rotatable shaft and an opposite second end capable of inserting into the latching groove of the driven member. The power source includes two electrodes. The motor and the spring are electrically connected in series between the two electrodes of the power source.

Abstract: An overload protection device includes a motor, a rotatable shaft, a driven wheel, and a transmission mechanism. The rotatable shaft is meshed with the motor. The rotatable shaft includes a rod and a driving arm. A connection pole is formed on the driving arm. An inner surface of the driven wheel forms a protrusion. A sidewall of the protrusion defines a cutout therein. The transmission mechanism includes a resilient member and two arms rotatably connected on the connecting pole. The transmission mechanism is wedged in the cutout. when the motor is overloaded, the torque applied on the arms by the drive force of the motor becomes greater than the torque applied on the arms by the resilient force of the resilient member, the resilient member can no longer hold the transmission mechanism in a wedge shape, the arms become parallel each other to slide out of the cutout.

Abstract: An overload protection device using a rotatable arm rotatably connected to a driving wheel and a resilient member connecting the rotatable arm with the driving wheel for transmitting the torque outputted by a motor to the driving wheel, the resilient member is obviously deformed when the motor is operated in a overload condition to detach the rotatable arm from the motor for protecting the motor from the overload condition.

Abstract: An electronic apparatus with a function for charging for itself is provided. The apparatus comprises a base part and a cover part, the cover part is connected to the base part through a slide mechanism and the cover part can slide along the base part through the slide mechanism. The electronic apparatus further comprises an electromagnetic induction device. The electromagnetic induction device comprises a conductor group and a first magnetic object group. During the process of the cover part sliding along the base part, the conductor group and a magnetic field make relative movement to generate induced current. After converted to direct current (DC) by a rectifier, the induced current is input to a battery of the apparatus to charge for the battery.

Abstract: An overload protection device includes a motor, a transmitting shaft, a driving wheel, a resilient member, a sensor and a controller. The transmitting shaft including driving arm is meshed with the motor. The driving wheel is rotably engaged with the transmitting shaft at a distal end. The resilient member is connected to the driving arm at one end, and connected to the driving wheel at another end for driving the driving wheel to rotate. The sensor is mounted on the driving wheel and covered by the driving arm, and configured for and outputting a signal when the transmitting shaft is rotated relative to driving wheel. The controller is installed in the transmitting shaft and electrically coupled with the sensor for receiving the signal outputted from the sensor and shutting down the motor correspondingly.

Abstract: A charger capable of clamping portable communication device is provided. The charger includes a body, a securing portion, and at least one elastic element, wherein the at least one elastic element is deformable elastically when electricity power is supplied thereto, and recoverable to its normal shape when the power is off. The at least one elastic element joins the securing portion to the body. When a user uses the charger, firstly, places the portable communication device between the body and the securing portion, then, supplies electricity power, and the at least one elastic element contracts and drives the securing portion to move towards the body, as a result, the portable communication device is clamped.

Abstract: An electronic toy includes a main body and a moving device disposed under the main body for moving the electronic toy. The moving device includes a fixing board, a first wheel, a second wheel, and a motor. The first wheel and the second wheel are magnetic. The first wheel is rotatably fixed to the fixing board for supporting and moving the electronic toy. The second wheel is rotatably fixed to the fixing board and facing the first wheel. The second wheel is operable to apply a magnetic torque to the first wheel when rotating relative to the first wheel, so as to rotate the first wheel. The motor is connected to the second wheel for rotating the second wheel.

Abstract: A clutch device includes a sleeve-shaped first drive member, a first seal member, a second seal member, a plug, a second drive member, and a control member. The fist drive member, the first seal member and second seal member cooperate to form a sealed chamber filled with hydraulic liquid. The plug divides the sealed chamber into a first chamber and a second chamber, and the plug defines a screw hole and an opening communicating the first chamber with the second chamber respectively. An output shaft is extended from the plug. The second drive member is driven by the first drive member, and includes a screw shaft threadedly engaged with the screw hole of the plug. The control member is configured for covering or uncovering the opening of the plug. The clutch device is used for prevent overload.

Abstract: A connector plug comprises a shell defining at least two threaded holes. At least two conducting poles are set in an interior of the shell and corresponding to the at least two threaded holes. Each conducting pole comprises a pin extended from the interior of one of the at least two threaded holes. One cable is electronically connected to the pin, and one fixing portion is disposed on the cable and adjacent to the pin, and is received into the threaded hole.

Abstract: An overload protection device for protecting a motor from overload is disclosed. The overload protection device includes a shaft and a load carrying member driven by the driving portion of the shaft. The shaft includes a shaft body and a driving portion on an end of the shaft body. The load carrying member includes at least one magnetic member corresponding to the driving portion. Each of the at least one magnetic member includes a first magnetic member fixed on the load carrying member and a second magnetic member rotatably fixed on the load carrying member. The first magnetic member is located between the second magnetic member and the driving portion of the shaft and the same poles of the first and second magnetic member are opposite to each other. The driving portion is engaged with the first magnetic member and impels the first magnetic member to rotate the load carrying member under the rated load of the motor.

Abstract: A connector plug comprises a shell defining at least two threaded holes. At least two conducting poles are set in an interior of the shell and corresponding to the at least two threaded holes. Each conducting pole comprises a pin extended from the interior of one of the at least two threaded holes. One cable is electronically connected to the pin, and one fixing portion is disposed on the cable and adjacent to the pin, and is received into the threaded hole.