A device casing is configured to include a first casing member provided with a hole including a guide hole and a fitting hole that communicates with the guide hole, and a second casing member provided with a protrusion at a position corresponding to the hole, the second casing member being configured to be fixed with respect to the first casing member by fitting the protrusion to the fitting hole. The guide hole guides movement of the protrusion that entered within the guide hole in an oblique direction when fixing the second casing member with respect to the first casing member so that the second casing member can get close to the first casing member in a state where the second casing member is guided in the oblique direction. The protrusion that moved in the oblique direction along the guide hole, passed through the guide hole and reached inside the fitting hole fits to the fitting hole. The second casing member is fixed with respect to the first casing member by the fitting of the protrusion to the fitting hole.

A coupling for connecting a circuit board to a mount with a fastener. The mount may be connected to a component. The fastener includes a first snap-fit connection formation for establishing a snap-fit connection with a second snap-fit connection formation provided on the mount. When connected, the fastener clamps the circuit board against the mount. The fastener further includes a first engagement formation configured to engage with a second engagement formation on the mount for bracing the snap-fit connection.

A rotating buckle includes a first fixing member, a second fixing member, and a hook body. The first fixing member includes protruding posts. The second fixing member defines limiting slots and comprises a fixing portion. The fixing portion fixes the second fixing member to the first fixing member through a first resilient member. The hook body is received between the first fixing member and the second fixing member. The hook body defines a mounting hole, an inclined slot, and a receiving slot. The protruding posts are inserted through the mounting hole, the inclined slot, and the limiting slots. The fixing portion is inserted through the receiving slot. The hook body is fixed to the first fixing member through a second resilient member.

A hook fixing mechanism includes a fixing frame, a first hook, and a second hook. The first hook is rotationally mounted on the fixing frame. A first end of the first hook protrudes from the fixing frame, and a second end of the first hook is movably snapped on the fixing frame. The second hook is rotationally mounted on the fixing frame. A third end of the second hook protrudes from the fixing frame, and a fourth end of the second hook resists against the first hook.

A system includes a chassis assembly, a snap holder secured to the chassis assembly, and a second snap holder secured to the chassis assembly. A first tab clip may be snap-fitted onto the first snap holder to secure the first tab clip to the first snap holder, and a second tab clip may be snap-fitted onto the first snap holder to secure the second tab clip to the second snap holder. Each tab clip includes a soft component portion within the tab clip. A battery may be affixed to the first and second tab clips after the tab clips are secured to the snap holders.

A fastener includes a base having a joint plate extended therefrom toward a first direction, a joint plate extended from the joint plate toward a second direction and configured to secure to an electronic base board, and a fastening member protruded thereon toward a third direction. The fastener includes an elastic compressive unit connected to the joint plate and including a pushing part configured to abut with a circuit board downwardly rotated. Subject to the stress in the first direction and applied by the circuit board, the pushing part is moved back and the elastically-compressive unit is compressed to make the circuit board rotate to the bottom side of the pushing part, and an edge of the circuit board can be inserted into and abutted thereon the fastening member, and the circuit board is accommodated in a fastening space formed on the outside of the fastening member.

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.

Systems and methods are disclosed for a mechanical clip lock that may include a rigid substrate; a clip lock pin extending vertically from a surface of the rigid substrate; a semi-rigid arm having a first end coupled to the rigid substrate, the semi-rigid arm extending orthogonally from the rigid substrate; a clip lock socket disposed at a second end of the semi-rigid arm opposite the first end, the clip lock socket configured to releasably engage the clip lock pin; and a plurality of clipping pegs extending vertically from the surface of the rigid substrate, each of the plurality of clipping pegs disposed on an exterior portion of the clip lock pin, the plurality of clipping pegs configured to apply a compression force on a device when the clip lock socket and clip lock pin are releasably engaged, the compression force removably coupling the device to a printed circuit board.

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 computing system includes a chassis and a cage. The chassis includes one or more locking hooks. The cage includes a handlebar, a bar-linkage assembly, and a crank coupled to both the handlebar and the bar-linkage assembly. Rotating the handlebar from an unlocked position to a locked position lowers the cage relative to the chassis until the cage is locked in the one or more locking hooks of the chassis.