Abstract: A computer case includes a case, a main board, and a carrier. The case includes guiding members. The main board includes a first circuit board and a second circuit board. The first circuit board is attached to the case. The first circuit board includes a first connector. The second circuit board includes a second connector. The carrier includes a main body, a handle, and at least one latching member. The second circuit board is removably connected to the main body. Each latching member includes a rotary member and a rotary arm. The rotary member is rotatably connected to the main body and the rotary arm. The rotary member defines a receiving groove. The rotary arm is rotatably connected to the handle. When the second connector is connected to the first connector, guiding members stay in the receiving grooves to prevent the main body and the handle from moving.

Abstract: A battery overheating protection circuit includes a thermal resistor samples the temperature of the battery and converts the temperature into a temperature voltage, a comparison circuit compares the temperature voltage with a reference voltage for judging whether the temperature of the battery is higher than the maximum reference temperatures temperature or not. If yes, the comparison circuit outputs a protection signal to drive a charging module to stop charging the battery in the charging process, and to cut off the conducting path to draw power from the battery in the discharging process. The present invention sets two different maximum reference temperatures during charging process and discharging process by a reference voltage module, which makes the maximum allowable discharging temperature is higher than the maximum allowable charging temperature.

Abstract: A heat-dissipating structure of a housing is disclosed. The housing defines an opening that is embedded with the heat-dissipating structure. The heat-dissipating structure includes a number of metal slats, a number of connection members, and a supporting frame. The metal slats are spaced and angled to form air channels and fixed to each other via the connection members. The combination of the metal slats and connection members are supported by the supporting frame.

Abstract: A projector includes a housing, a projection lens, a receiving member, an optical engine, a light source module, a heat sink, and a fan. The housing includes a bottom wall and four sidewalls, the bottom wall and the four sidewalls together define a receiving space. One of the sidewalls a number of first vents, the other three sidewalls define a number of second vents. The projection lens is located at an intersecting corner of the sidewalls. The receiving member includes a first receiving portion and a second receiving portion. The optical engine is received in the second receiving portion. The light source module is received in the first receiving portion. The heat sink is located at an intersecting corner of the sidewalls. The fan is located at an intersecting corner of the sidewalls.

Abstract: A connector includes a main body, a reflecting member, and a cable electrically connected to a rear end of the main body. An elastic latch is formed on a top of the main body opposite to the cable. The reflecting member is fitted to a rear portion of the main body, and two protrusions are formed on a top of the reflecting member. A surface of each protrusion is coated with reflective material, slanted, and opposite to the cable.

Abstract: A drilling system includes a controller, a human-machine interface, and a drilling device. The controller stores a drilling procedure and a startup mode module for the drilling procedure, and generates an information list which includes location information and corresponding procedure line number for each hole. The human-machine interface is configured for selecting the startup mode module for the drilling procedure, and for inputting a query information corresponding to the selected startup mode module. The controller invokes the corresponding procedure line according to the inputted query information to restart the drilling process to enable the drilling device to return to work.

Abstract: A tool changer includes a spindle including a first collet, an auxiliary arm having a second collet, a tool-pan having a plurality of tool-seats, and an auxiliary tool-magazine. The auxiliary tool-magazine comprises a main body, a turnplate rotatable relative to the main body, a first tool-carrier attached to the turnplate, and a second tool-carrier attached to the turnplate.

Abstract: An imaging lens system in order from the object side to the image side includes a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive. The imaging lens system satisfies the following formulas: Nd2>1.8 and Vd2<25, where Nd2 is the refractive index of the second lens, Vd2 is the Abbe number of the second lens.

Abstract: An electronic device includes a housing, a display, and a printed circuit board. The housing receives the display unit and the printed circuit board. The printed circuit board surrounds a periphery of the display unit. The electronic device has a thin thickness.

Abstract: A power supply control circuit includes a first switch unit comprising an input terminal to receive a control signal, and a number of second switch units. The second switch units are each connected between an input power source and a power output terminal. The first switch unit controls the number of second switch units to be turned on in response to the control signal being in a first status, so as to control the number of power output terminals to output corresponding power sources. The first switch unit controls the number of second switch units to be turned off in response to the control signal being in a second status, so as to direct the power output terminals to not output the corresponding power sources.

Abstract: A lens module includes a case, one and more lens units positioned in the case and having at least one lens, a carrying member, a piezoelectric driving unit, and at least a fixing member. The carrying member is connected to the lens unit such that the lens unit is movable forward and backward. The piezoelectric driving unit is mounted in the case for transferring a driving force to the carrying member so as to carry the lens unit to move. By using this configuration, the front and rear lens units may conduct the auto focus function and the zoom function respectively, thereby reducing a stroke of the lens, and reducing the size of the lens driving unit. Accordingly, the lens module may be manufactured in a small size so that it may be inserted into a cellular phone.

Abstract: A control circuit is configured to control the charge and discharge of a flash unit. The flash unit includes an anode, a cathode, and a trigger electrode. The control circuit includes a charging circuit and a triggering circuit. One terminal of the charging circuit is coupled to a charging terminal and another terminal is coupled to the anode and the cathode. One terminal of the triggering circuit is coupled to a triggering terminal, another terminal is couple to the trigger electrode. The charging circuit includes a first capacitor coupled to the cathode and a second capacitor coupled to the anode. When the charging terminal receives a charging voltage and the triggering terminal receives a high-level voltage, three times charging voltage is formed between the anode and the cathode; then the flash unit generates a flash.

Abstract: An electronic device includes a base and a sidewall attached to the base. The sidewall includes a heat dissipating area defining a plurality of vents, a sliding plate slidably coupled to an inner side of the sidewall, and a controlling arm made of metal material having high coefficient of thermal expansion. The controlling arm is connected between the sliding plate and the sidewall, for driving the sliding plate to slide to cover or uncover the vents of the heat dissipating area according to different interior temperature of the electronic device.

Abstract: A test system for overclocking capability of a central processing unit (CPU) includes a basic input and output system (BIOS), a frequency generator, and a watchdog timer. The BIOS includes an input module, a watchdog control module, and a frequency increasing module. The input module inputs an initial frequency of a CPU to the frequency generator to adjust a real-time frequency of the CPU. The watchdog control module sends a counter signal to the watchdog timer in a preset time interval. The watchdog timer receives the counter signal. If the watchdog timer does not receive the counter signal within the preset time, the watchdog timer outputs a reset signal to restart the computer. The frequency increasing module adds a preset increment to the real-time frequency to obtain a newly adjusted frequency, and provides the newly adjusted frequency to the frequency generator to adjust the real-time frequency.

Abstract: A hinge includes a positioning member, and a first rotational assembly rotatably mounted to the positioning member. The first rotational assembly comprises a first shaft rotatably mounted to the positioning member, an interference member, a resilient member fixed to the first shaft, and a securing member fixed to the first shaft. The interference member is fixed to the first shaft, and slide relative to the positioning member to engage with or disengage from the positioning member. The resilient member comprises an aseismatic block and a spring clamping a circumference of the aseismatic block. The resilient member is sandwiched between the interference member and the securing member, and the interference member abuts against the aseismatic block.

Abstract: A hinge includes a first bracket, a second bracket, a shaft, and first and second interference elements. The shaft is fixed to the first bracket. The second bracket rotationally fit about the shaft. The first interference element is rotationally mounted on the shaft and fixed to the second bracket, and defines two unleveled surfaces at one side. The second interference element is immovably mounted on the shaft beside the first interference element, and defines two unleveled surfaces at one side facing and corresponding to the unleveled surfaces of the first interference element.

Abstract: An imaging device includes a capturing module with at least one lens for capturing an image from a scene, a driving module for driving the at least one lens to different focusing positions using different driving steps, a flat-scene judging module, and a step-judging module. The flat-scene judging module divides the image into a central area and a plurality of peripheral areas, and determines whether the captured scene is a flat scene according to the divided image. The step-judging module determines whether the driving steps corresponding to a maximum focusing value of the central area of the image are same as driving steps corresponding to respective maximum focusing values of the peripheral areas of image, and changes the driving steps corresponding to the maximum focusing value of the central area to the driving steps corresponding to the greatest one of the maximum focusing values of the peripheral areas.

Abstract: A power supply system includes a power supply, a daughterboard, and a motherboard. Output currents of power connectors of the motherboard and impedances of copper foils between every two adjacent power connectors of the motherboard are obtained via simulation. A voltage of one power connector of the motherboard is predetermined. Therefore, desired impedances of copper foils between VRM connectors and corresponding power connectors on the daughter board are determined via calculations, to make currents passing through the power connectors of the motherboard equal to each other.