Abstract: Electronic device enclosure includes a base, a cover, and a top frame. The base comprises a bottom plate, a rear plate with a first edge coupled to an edge of the bottom plate, and two opposing side plates with a first edge of each side plate coupled to an edge of the bottom plate and a second edge of each side plate coupled to the rear plate. The top frame is positioned along a second edge of the rear plate and each side plate, the second rear plate edge being opposite the first rear plate edge, and each second side plate edge being opposite the first edge of the side plate. The base and the cover plate cooperate to form a receiving space for enclosing a plurality of electronic components, and the bottom plate, the rear plate and each side plate are each primarily composed of non-metallic material.

Abstract: An electronic device enclosure includes a cabinet, a door movably mounted to the cabinet, and a limiting block rotatably mounted to the door. The cabinet includes a first side plate. The door defines a limiting slot. The door is movable relative to the cabinet between a closed position and an open position. When the door is located in the closed position, the door is substantially perpendicular to the first side plate and covers the cabinet. When the door is located in the open position, the door is substantially parallel to the first side plate, and the limiting block is engaged in the limiting slot, which prevents the door from dropping.

Abstract: An imaging device includes an imaging module configured to receive an imaging assembly, which is capable of creating images; a power control module configured to receive a control circuit assembly capable of controlling the imaging assembly and a power supply capable of supplying power for the control circuit assembly and the imaging assembly; and a rotating assembly. The rotating assembly includes installation member secured to the power control module and a movable member secured to the imaging module. The movable member is movable relative to the installation member to move the imaging module relative to the power control module, so that the imaging module can be moved without moving the whole imaging device.

Abstract: A mounting structure in a power supply chassis includes a mounting portion and a securing portion. The mounting portion is located on a first sidewall of the power supply chassis. The mounting portion includes a first protruding plate for supporting a circuit board, a second protruding plate parallel to the first protruding plate, and a positioning portion to receive the circuit board. The positioning portion is located between the first protruding plate and the second protruding plate. The securing portion includes a resilient portion extending into the positioning portion. When the circuit board is installed in the power supply chassis, the circuit board is received in the positioning portion and supported by the first protruding plate, with the resilient portion engaged in a securing hole defined in the circuit board.

Abstract: A fan rotational speed adjusting system includes a power supply unit, a fan, a current detecting circuit and a temperature detecting circuit. The current detecting circuit detects a first DC voltage from the power supply unit, compares the first DC voltage with a first reference voltage, and outputs a first adjusting voltage. The temperature detecting circuit detects a temperature change of the power supply unit, and outputs a second adjusting voltage. The temperature detecting circuit receives the first adjusting voltage, compares the first adjusting voltage and the second adjusting voltage with a second reference voltage, and outputs a third DC voltage to the fan. The fan rotates in the corresponding rotational speed, and dissipates heat for the power supply unit.

Abstract: An imaging device includes a lens, a light pipe, a cover, and a mounting base. The cover can be coupled to the mounting base. The cover defines a groove and includes a latching plate and a mounting plate. The latching plate and the mounting plate are located at two opposite sides of the groove. The mounting plate defines a mounting hole. The mounting base defines a slot, a limiting slot corresponding to the latching plate, and a plurality of securing holes. When the imaging device is assembled, the latching plate is engaged in the limiting slot, a fastener is inserted into the mounting hole and engaged in the corresponding securing hole. The lens and the light pipe are received in the slot and the groove.

Abstract: A buzzer circuit is connected to a drive circuit. The buzzer circuit includes a buzzer and a control unit. The control unit includes an electronic switch, a first resistor, a second resistor, and a constant voltage component. A control end of the electronic switch is connected to a power pin of the buzzer through the first resistor, and is grounded through the constant voltage component. A first end of the electronic switch is connected to a grounded pin of the buzzer. A second end of the electronic switch is grounded through the second resistor. When the buzzer receives a high level drive signal, the electronic switch is turned on. A voltage between the control end and the second end of the electronic switch is constant, the constant voltage component provides a constant voltage to the second resistor, and a current of the second resistor is constant.

Abstract: Method of unlocking an electronic device includes outputting a first portion of a predetermined video file, on a display device of the electronic device when the electronic device is locked. A second portion of the predetermined video file is outputting when a first time length of a detected microphone signal is greater than a first predetermined duration. The electronic device is unlocked when a second time length of the detected microphone signal is greater than a second predetermined duration, while the second portion of the predetermined video file is outputting.

Abstract: An overvoltage protection circuit includes a supplying power circuit, a triggering circuit, and a controlling circuit. The supplying power circuit coverts AC power into DC power. The supplying power circuit includes a voltage detective point. The triggering circuit is connected to the voltage detective point. The triggering circuit is triggered when the voltage detective point in a high level voltage. The controlling circuit is connected to the triggering circuit. The controlling circuit includes a power supply point. The controlling circuit cuts off the power supply point when the triggering circuit is triggered.

Abstract: A rack-stop structure of a frame and a door includes a bracket, a bar, and a pull spring. A positioning slideway and an escaping slideway are defined in the bracket. A plurality of positioning portions and a plurality of escaping tabs are located on the positioning slideway. Each of the plurality of positioning portions is spaced by each of the plurality of escaping tabs. An engaging cutout is defined in each of the plurality of positioning portions. One end of the bar is slidable in the bracket. A pin is located at the end of the bar. The pull spring is mounted to the bar for pulling the bar away from the bracket.

Abstract: Electronic device and a method for backlighting a liquid crystal display (LCD) display to provide different display definitions, the LCD display includes a backlight unit composed of one or more backlighting blocks. The method determines a display definition of a video image and illuminates or turns off backlighting blocks of the backlight unit to display the video image accordingly. The video image is displayed in full screen by all backlighting blocks if the video image is an ultra high definition (UHD) image, and turns on a smaller number of the backlighting blocks to display the video image if the video image has other than UHD display definition. As such, the electronic device is controlled to save power consumption in different display definitions of the LCD display.

Abstract: A mounting system for a hard disk drive includes a case, an insulation member, and a mounting member. The case is configured to receive the hard disk drive and includes a sidewall and an EMI protection structure extending from the sidewall. The insulation member is secured to the sidewall. The mounting member extends through the sidewall and the insulation member and is configured to secure the hard disk drive to the case. The insulation member insulates the mounting member from the case, and the EMI protection structure is electronically coupled to the mounting member, causing the case to be electronically coupled to the hard disk drive.

Abstract: A buffering device includes a cylindrical casing and a piston module movably mounted in the cylindrical casing. The cylindrical casing includes a base plate and a shielding piece pivotally attached to the base plate. An air inlet and an air outlet are defined in the base plate. A diameter of the air inlet is greater than that of the air outlet. When the piston module is moving towards the base plate, the shielding piece is rotated to a closed position to shield the air inlet by air pressure above the shielding piece. When the piston module is moving away from the base plate, the shielding piece is rotated to an open position to expose the air inlet by environmental air pressure.

Abstract: A product selection system for a vending machine is provided which is immune to human misbehavior or uncertainty. The system includes a main controller and a plurality of product selection panels connected to the main controller. Each product selection panel includes a plurality of keys, each of which is associated with a type of product stored in the vending machine. When a product selection panel detects a first key-down event, the main controller broadcasts a suspending command to the product selection panels so each product selection panel suspends the detection of any further key-down event in response to receiving the suspending command, until after a product-dispensing routine has been completed or the expiry of a predetermined period of time. A product selection method for a vending machine is also provided.

Abstract: A bracket supporting apparatus includes a side plate, two fixing brackets, a first mounting bracket defining a first through hole, and a second mounting bracket defining a second through hole. Each of the two fixing brackets includes a connection portion defining a fixing hole. Two supporting portions extend from two sides of the connection portion. A mounting portion extends from one side of each of the two supporting portions. The two supporting portions of each of the two fixing brackets are substantially parallel to the first mounting bracket and the second mounting bracket. The mounting portions are fixed to the side plate. A first fastener passes through each of the first through holes, the second through holes, and the fixing holes to fix the first mounting bracket and the second mounting bracket to each of the two fixing brackets.

Abstract: A back light brightness adjusting apparatus includes a control unit, a first adjusting unit, and a second adjusting unit. The control unit receives a first control signal from a display chip, and outputs at least one of a first switch signal or a second switch signal. The second adjusting unit receives a second control signal from the display chip. When the electronic device is turned on, the control unit outputs the first switch signal at a first voltage and the second switch signal at a second voltage, a first adjusting signal is received from a CPU and the back light brightness is adjusted. When the electronic device is turned off, the control unit outputs the first switch signal at a third voltage and the second switch signal at a fourth voltage, a second adjusting signal is received from the display chip and back light brightness is adjusted accordingly.

Abstract: A product delivery device includes a receiving tray. The receiving tray includes a bottom plate, a pushing plate, and a shielding plate. The pushing plate is toward the shielding plate, and the shielding plate is rotatably attached to the bottom plate. A product exit is defined in the bottom plate and is covered by the shielding plate. The pushing plate pushes a product onto the shielding plate. The shielding plate rotates to allow the product to drop out of the receiving tray via the product exit.

Abstract: A transformable computing device has a detachable first part with a main central processing unit (CPU), a second part having an display and a secondary CPU, and a detachable third part having a graphical processing unit (GPU). The main CPU can work with the secondary CPU via parallel processing means when the first part is connected to the second part; and the display of the second part can run on the GPU when the third part is connected to the second part.

Abstract: An automatic vending machine with a stabilizing support for stocked items of merchandise includes a cabinet, a driving member secured in the cabinet, a helical element, and a pressing member secured to the cabinet. The cabinet includes a bottom plate. The helical element is secured to the driving member and moveable by the driving member. The pressing member is located within the coils of the helical element and runs the length of the helical element to support items of merchandise and reliably deliver an item of merchandise when bought.

Abstract: An electronic device includes a chassis, an air-guiding housing mounted in the chassis, and an airflow control member. The chassis includes a base panel with a plurality of ventilation holes. The air-guiding housing comprises an airflow passage aligned with the plurality of ventilation holes. The airflow control member includes a shielding plate attached on the base panel. The airflow control member is movable between a first position and a second position. In the first position, the shielding plate is located beside the air-guiding housing, and the airflow passage is communicated with the plurality of ventilation holes for allowing air flowing to an outside of the chassis via the plurality of ventilation holes. In the second position, the shielding plate is located between the air-guiding housing and the base panel for closing the plurality of ventilation holes and preventing air flowing to the outside of the chassis.