A system chassis includes a housing and a card cage. The card cage is positioned at a first end of the housing. The card cage includes a plurality of cavities arranged to receive (i) a lower row of expansion device cards arranged in a first orientation, and (ii) an upper row of expansion device cards arranged in a second orientation, which is upside down from the first orientation.

A communication device insertable into an external electronic device is provided. The communication device includes a converter circuit, a power line, a first conductor connected to the power line, and at least one second conductor electrically disconnected from the first conductor and connected to a ground, the first conductor being electrically connected to the at least one second conductor by fastening between the communication device and the external electronic device, a signal line, and a control circuit connected to the power line, the first conductor, and the signal line, wherein the control circuit is configured to receive a first signal from a processor of the external electronic device through the signal line, receive a second signal generated based on a discharging of a power flowing along the power line to the ground through the at least one second conductor when the first conductor is electrically connected to the at least one second conductor, and output, based on the first signal and the second signal, a control signal to the converter circuit for controlling the converter circuit.

A server chassis, configured to detachably fasten a PCB, includes a case, an expansion frame, and a fastening assembly. The fastening assembly includes a slidable component, a guiding component disposed through the slidable component and fixed to the case, a movable pin movably disposed through the slidable component, and a fastening pin fixed to the slidable component. When the slidable component is at a fastening position, the movable pin is movable between inserted and extracted positions. When the movable pin is at the inserted position, the movable pin is disposed through the slidable component and the case, such that the slidable component is positioned at the fastening position, and the fastening pin is disposed through the PCB and the expansion frame. When the movable pin is at the extracted position, the movable pin is disengaged from the case, such that the slidable component is slidable to a releasing position.

A memory module assisting in efficient heat dissipation includes a motherboard, a plurality of fixing devices, a plurality of memory cards, and a plurality of dummy memory cards. The fixing devices are fixed on the motherboard side by side. The memory cards are fixed on some of the fixing devices as necessary, and the dummy memory cards are fixed on the remaining fixing devices which are vacant. The dummy memory cards inserted into the vacant fixing devices prevent the flow of air through the space above the vacant fixing devices. An electronic device including the memory module is also disclosed.

A fastener for use in electronic device includes: a positioning member, having a base, wherein a connecting ring is disposed above the base, a rail slot having two ends respectively formed with a start blocking edge and a stop blocking edge is disposed on a top surface of the connecting ring, and a buckle slot is formed between the base and the connecting ring; and a rotating member, having a shaft column, wherein a block piece is radially formed on a top end of the shaft column, an annular supporting platform is radially formed at a bottom end thereof, at least three wing pieces are axially and downwardly extended from a circumference of the supporting platform, wherein at least two of the wing pieces respectively have a buckle hook, and the other wing piece is radially extended with a position limiting sheet.

According to examples, an apparatus may include side walls, a socket positioned between the side walls, and movable panels slidably mounted on the side walls, in which the movable panels are to support an electronic module. The apparatus may also include a handle connected to the movable panels, in which rotation of the handle in a first direction causes the movable panels to move laterally with respect to the side walls away from the socket and rotation of the handle in a second direction causes the movable panels to move laterally with respect to the side walls toward the socket to cause, when the electronic module is supported by the movable panels, the electronic module to be removed from or to be inserted into the socket.

A toolless card/bracket coupling system includes a card bracket base that mounts to a chassis with a chassis mounting configuration, spaced-apart card securing support members extending from the card bracket base, and a toolless card securing subsystem on each of the card securing support members. Each toolless card securing subsystem may move towards a respective card aperture defined by the card while in a securing orientation, engage its respective card aperture and, in response, transition to a coupling orientation that allows that toolless card securing subsystem to move through its respective card aperture and, in response to extending through its respective card aperture and through the card, transition back to the securing orientation to secure the card to the card bracket base via engagement with the card.

A tiered locking mechanism secures a component card to a printed circuit board and includes a base, a top slider structure, and a biasing element. The base includes a first-tier side wall and a coupling structure configured to engage the PCB. The top slider structure includes a second-tier side wall along with protrusions having a beveled edge. The top slider structure is slidable between locked and unlocked positions. The unlocked position includes the protrusions being displaced away from a component card engagement side relative to the locked position. A bottom one of the protrusions and the first-tier side wall form a first receiving slot in the locked position. Atop one of the plurality of protrusions and the second-tier wall form a second receiving slot. The biasing element is configured to urge the top slider structure toward the locked position and to compress as the top slider structure moves away from the component card engagement side.

A latch mechanism for securing an expansion card assembly in a computer chassis includes a lever, a stop member, a rotary latch, a first biasing structure, and a second biasing structure. The lever includes a latching end and an opposing pinned end. The stop member extends from the pinned end. The rotary latch is connected to the latching end and includes a receiving chamber and a hook structure. The hook structure includes a notch for receiving a stop pin. The first biasing structure extends from the lever into the receiving chamber and is configured to urge the rotary latch into a locked position. The second biasing structure is configured to urge the lever about the pinned end to an open position.

A replacement device includes a replacement module and a slider. The replacement module includes a sliding portion. The sliding portion is provided with a limiting column, which is formed with a fixing hole. The slider includes a slider body. The slider body is provided with a first latch, a limiting hole and a fixing element, wherein the first latch is arranged on a first side edge of the slider body. The slider is correspondingly arranged on the sliding portion of the replacement module, and the limiting column of the sliding portion passes through the limiting hole. The fixing element has a top portion, and is fixed in the fixing hole. The size of the top portion is greater than the size of the limiting hole, so that the slider moves relative to the replacement module within a limit range of the limiting hole.