Abstract: A printed circuit board module includes a first printed circuit board defining a plurality of front conductive pads formed on a top surface thereof and arranged along a transversal direction, and a second printed circuit board located on and welded to the first printed circuit board, the second printed board defining a plurality of first contacts formed on a top surface thereof for mating with a complementary connector.

Abstract: A terminal comprises an upper arm having a top surface for a mating area; a lower arm paralleled with the upper arm and having a bottom surface soldering area; and a connecting arm connected with the upper arm and the lower arm.

Abstract: An electronic device connected to a power supply comprises a load, an protection module, and an indicating circuit. The protection module is connected between the power supply and the load, and is capable of establishing a connection between the power supply and the load or cutting off the connection. The indicating circuit connected to the power supply and the protection module is capable of outputting different indicating information based on different states of the protection module. When the protection module establishes the connection between the power supply and the load, the indicating circuit outputs first indicating information. When the protection module cuts off the connection between the power supply and the load, the indicating circuit outputs second indicating information.

Abstract: A locking structure includes a hook disposed on a first object and engagable with a locking member disposed on a second object. The locking member includes a main body rotatable about an axis thereof and a number of locking portions radially protruding from the main body. When the main body rotates about the axis, the locking portions rotate together with the main body to engage with and disengage from the hook to lock the first object to and unlock the first object from the second object.

Abstract: A card edge connector for receiving a card which is rotatably assembled includes an insulative housing, a plurality of terminals and a pair of metal pieces. The insulative housing has a inserted slot for receiving the card and a key within the inserted slot for anti-mismating of the card. The terminals are arranged in a single row and located at one side of the inserted slot. Each terminal includes a solder portion extending out of the insulative housing and a contacting portion projecting into the inserted slot. The metal pieces locate at the other side of the inserted slot, each of which includes a mounting portion and an abutting portion projecting into the inserted slot. The terminals are arranged in a single row for reducing the height of the card edge connector.

Abstract: A data mining method, apparatus, and system are provided.

Abstract: A measuring device for measuring the torque of a torsion spring, includes a base, an electronic scale secured to the base, a supporting plate fixed to the base, and a holding mechanism slidably secured to the supporting plate. The holding mechanism includes a screw slidably secured to the supporting plate, two nuts engaging with the screw and arranged at opposite sides of the screw, and a holding portion for holding the torsion spring. The nuts are operated to adjust the height of the screw relative to the supporting plate, to drive the torsion spring to depress the electronic scale. The electronic scale displays a weight value for calculating the torque of the torsion spring when depressed by the torsion spring.

Abstract: An exemplary portable electronic device includes a bottom cover, a top cover, an electronic module, and elastic washers. The top cover engages with the bottom cover to define a space therebetween. The electronic module is received in the space. Poles protrude up from the bottom cover. The elastic washers are fixed on the electronic module. A through hole is defined in each of the washers. The poles respectively extend through the through holes of the washers, and opposite ends of each of the washers respectively elastically abut the top cover and the bottom cover.

Abstract: An electronic device receives a voltage from a power source. The electronic device comprises a voltage converting module, an energy storing module, a switching module, and an illuminating module. The voltage converting module converts the voltage provided by the power source into a working voltage. The energy storing module is capable of being charged by the working voltage. The switching module is connected between the voltage converting module and the illuminating module. The illuminating module is capable of emitting light for indicating the voltage of the energy storing module. When the working voltage is suddenly changed, the switching module turns off and cuts off an electrical connection between the voltage converting module and the illuminating module. The illuminating module stops emitting light.

Abstract: An exemplary display unit includes a rear cover, a bracket disposed on the rear cover, a display mounted on the bracket, and a front cover secured to the rear cover to sandwich the display and the bracket between the front cover and the rear cover. The bracket includes a plate supporting the display, a pair of bulges protruding upwardly from two opposite sides of the plate and a pair of tabs extending upwardly from the bulges, respectively. The pair of tabs press against two opposite lateral faces of the display to dissipate static electricity on the display to ground.

Abstract: a data mining method for a social network of a terminal user and related methods, apparatuses and systems are provided. A user identifier of a terminal may be acquired, then a communication record of a user is acquired by using the user identifier, and first social information is obtained according to the user identifier and the communication record; a data packet for accessing, by the user, a social network service is acquired according to the user identifier, and second social information is obtained according to the user identifier and the data packet; information published by the user on the Internet may be acquired according to the user identifier, and third social information is obtained according to the user identifier and the published information, and finally, a user social database is established or updated by using the first social information, the second social information and the third social information.

Abstract: A panel assembly includes a first panel having a body and a mating portion formed at an end of the body. The body includes a first surface and an opposite second surface, and the first surface includes several first hooking members and several protruding tabs. A second panel includes a first side and an opposite second side, the first side includes several resilient tabs and several second hooking members. Each resilient tab defines a receiving hole, and the second panel further has a top surface and a bottom surface that includes a protruding portion at the second side. The mating portion of the first panel is snugly received in the chamber, the first hooking members engage the second hooking members, and each of the tabs of the first panel is received in one of the receiving holes of the resilient tabs, thereby coupling the second panel to the first panel.

Abstract: A printed circuit board includes a first conductive metal layer, a ground layer and a first insulating layer arranged between the first conductive metal layer and the ground layer. A through-hole runs through the first conductive metal layer, the first insulating layer and the ground layer. The through-hole is configured for an insertion of a ground pin of an electronic component. A second insulation layer is formed on an inside wall of the first conductive metal layer in the through-hole, thereby the ground pin inserted in the through-hole being insulated from the first conductive metal layer. A second conductive metal layer is formed on an inside wall of the ground layer and an inside wall of the first insulating layer in the through-hole, to electrically connect the ground pin to the ground layer, to provide a ground path for the electronic component.

Abstract: An electronic device includes a motherboard and a heat dissipating plate. The motherboard includes a base. The base includes a number of ports and an electronic element. The heat dissipating plate includes a substrate and a number of fasteners extending out from the substrate for engaging with the number of ports of the motherboard. The substrate defines a bulging cavity for engaging with and dissipating heat from the electronic element.

Abstract: An exemplary electronic device includes a front cover, a display screen and two speakers located on the back surface, and a back plate abutting against the display screen and two speakers. Five fasteners extend backwardly from a back surface of the front cover. Each of the fasteners includes a connecting plate extending backwardly from the back surface and a top plate formed at a free end of the connecting plate. Five latching tabs are formed on the back plate corresponding to the fasteners. Each of the latching tabs includes a latching tip latched between the top plate of the corresponding fastener and the back surface of the front cover. The back plate abuts against the display screen and the two speakers, thus mounting the display screen and the two speakers on the front cover.

Abstract: A fastening structure assembly includes a housing, a to-be-fixed element, and at least one fastening element. The housing defines at least one fastening post. The to-be-fixed element includes at least one supporter each of which is bent to surround one of the at least one fastening post. Each of the at least one fastening element includes a stopper and a fastening pole extending from the stopper. Each of the fastening pole engages with one of the fastening posts to make the corresponding stopper resist an edge of the supporter surrounding the fastening post to fasten the to-be-fixed element to the housing.

Abstract: An electronic device includes a housing defining at least one mounting hole, a key assembly secured to the housing, and a circuit board housed in the housing. A securing mechanism is secured to the housing and is used to hold the key assembly for preventing the key assembly from moving in a first direction. The circuit board abuts the key assembly to prevent the key assembly from moving in a second direction perpendicular to the first direction when fixed to the housing.

Abstract: An infrared remotely controlled circuit employed in an electronic device which includes a display panel and a host machine. The infrared remotely controlled circuitry includes a first remotely controlled circuit, a second remotely controlled circuit, and a microprogrammed control unit (MCU). The first remotely controlled circuit includes a first infrared receiver for mounting in the display panel and a first diode with the cathode connected to a first port of the first infrared receiver. The second remotely controlled circuit includes a second infrared receiver for mounting in the host machine and a second diode with the cathode connected to a first port of the second infrared receiver. The MCU is connected to the anode of the first diode to form a first signal input port and the anode of the second diode to form a second signal input port.

Abstract: A print circuit board (PCB) includes a first surface defining a number of first pads and a second surface defining a number of second pads. The number of the first pads is equal to the number of the second pads. Each first pad corresponds to one second pad and the first pad and the corresponding second pad form a pair of pads. Each pair of pads defines at least one via hole and each of the via hole connects the first pad and the second pad of each pair of pads.

Abstract: A button mechanism is arranged in an electronic device for actuating a switch. The button mechanism includes a support fixed in the electronic device, a button, an elastic connection member, and a resisting member. The button includes a button body that can be pressed, and an actuation portion protruding from the button body, the actuation portion being located above the switch. The elastic connection member connects the button body to the support, and the elastic connection member is elastically deformed when the button body is deformed. The resisting member is arranged between the button body and the switch, for preventing the button body from moving down too far, thereby limiting a traveling range of the button body.