摘要:
An exemplary electronic device includes an electronic component, a heat dissipation device, a casing, and a heat insulation layer. The heat dissipation device is positioned on the electronic component for dissipating heat generated by the electronic component. The electronic component and the heat dissipation device are located at an inner side of the casing. The heat insulation layer is located on the heat dissipation device and is close to the casing. The heat insulation layer is made of aerogel material.
摘要:
A device for combining annular transformers with a machine housing includes a bolt to fix annular transformers on a machine housing and a saucer-shaped plate assembled on the outer side of the machine housing. The saucer-shaped plate is bored with a central insert hole for the bolt to pass therethrough and has its outer annular portion formed with a first plane and its inner annular portion formed with a second plane higher than the first one. The two planes are connected by an annular conical portion contracting gradually toward its upper side to be positioned in the machine housing. The bolt is orderly inserted through the saucer-shaped plate, the machine housing and the annular transformers to fix securely the annular transformers on the machine housing. The bolt has its head completely positioned in the conical portion of the saucer-shaped plate, not protruding out of the machine housing.
摘要:
An exemplary method for manufacturing a thermally insulating electronic device casing includes the following steps. First, a cover and a mold are provided. The cover includes a top surface. The mold includes a bottom surface, and the bottom surface of the mold is depressed inwardly thereby defining a recess. Next, the mold is arranged to cover the cover, with the bottom surface of the mold attached on the top surface of the cover. Thereby, a room is cooperatively defined by the recess and the top surface of the cover. Then the room is filled with aerogel solution. After that, the aerogel solution in the room is dried. Finally, the mold is and removed from the cover.
摘要:
A computer motherboard is provided with a plurality of expansion slots; an expansion card including a PCB, a PCI slot disposed on the PCB, two connectors disposed on an edge of the PCB, each connector including a plurality of contacts, and a PCIe slot disposed on the PCB wherein both the PCI slot and the PCIe slot are electrically connected to the contacts; a PCI card fitted into the PCI slot; and a PCIe card fitted into the PCIe slot. The computer mother can be made compact.
摘要:
A plastic waterproof covering arrangement includes a peripheral edge of arcuate section; a first set of a plurality of concentric structures; a second set of a plurality of concentric structures; and a brace member for separating the first set of concentric structures from the second set of concentric structures; wherein each of the concentric structures comprises a plurality of concentric circular grooves; and wherein at least one of the concentric structures is provided with a transverse diametrical slit and a circular hole through the slit and a center of the concentric structure.
摘要:
A fan includes a speed control circuit and a motor electrically connected with the speed control circuit. The speed control circuit includes an inputting circuit and a transforming circuit electrically connected with the inputting circuit. The inputting circuit supplies a constant current to the transforming circuit. The transforming circuit transforms the constant current to a fluctuating current and outputs the fluctuating current to the motor of the fan. The fluctuating current causes a rotation with a fluctuating speed to the motor of the fan.
摘要:
An expansion card is provided with a PCB; a PCI slot disposed on the PCB, two connectors disposed on an edge of the PCB, each connector including a plurality of contacts; and a PCIe slot disposed on the PCB. Both the PCI slot and the PCIe slot are electrically connected to the contacts. The expansion card can be connected to a compact computer motherboard.