A substrate-fastening device and a substrate-assembling structure are disclosed. The substrate-fastening device includes a base and a fastening component. The base correspondingly carries a substrate including a perforation. The fastening component is disposed on the base, corresponds to the perforation, and includes a supporting portion, a positioning portion, a resin-attaching portion, an end portion and a fixation resin. The supporting portion is disposed on the base to support the substrate. The positioning portion is disposed on a supporting surface of the supporting portion and extended along the perforation. The resin-attaching portion is extended along the perforation. The end portion is connected to the positioning portion through the resin-attaching portion. The fixation resin is disposed around the resin-attaching portion and connected between the end portion and the positioning portion. The fixation resin covers the second surface adjacent to the perforation, and fills the gap between the resin-attaching portion and the perforation.

An electronic control device includes a board including a heat sink on which a heat generation element is mounted, and a housing that is in contact with the board and dissipates heat of the heat generation element to the outside. A potential of the housing is a ground, and a potential of the heat sink is a non-ground. The board includes a first layer including a first non-ground wiring that is in direct contact with the heat sink, and a second layer including a second ground wiring that is in electrical and thermal contact with the housing. The first non-ground wiring and the second ground wiring overlap each other in plan view from a thickness direction of the board.

An electronic device is provided. The electronic device includes a housing, a fastened object, a fastener, and a base member. The housing includes a housing body and a bracket. The bracket is integrally formed on the housing body. The bracket includes a bracket stage, a bracket hole and a bracket recess. The bracket hole is formed on the bracket stage. The fastened object corresponds to the bracket stage. At least a portion of the base member is moveably inserted into the bracket recess. The base member includes a member fastening hole. The fastener passes through the fastened object and the bracket hole to connect to the member fastening hole of the base member.

An example electronic device is disclosed that includes a housing including a first external cover and a second external cover opposite the first external cover. In addition, the electronic device includes an electronic component disposed within the housing, between an inner surface of the first external cover and an inner surface of the second external cover. The electronic component is mounted to the first external cover with a mounting screw assembly, and the mounting screw assembly is engaged with the inner surface of the second external cover.

A soldering component and a method of fitting it to boards are introduced. The soldering component includes a body and a fitting portion. The fitting portion is fitted to an object. The body has an engaging portion with an elastic retraction space conducive to elastic retraction of two or more engagement portions, allowing the engagement portions to engage with another object. The soldering component has a weldable surface to be soldered to a weldable surface of the object. The weldable surface of the object has a built-in solder layer adapted to be heated for soldering the soldering component and the weldable surface of the object together. The soldering component is disposed in a carrier, taken out with a tool, compared with the object by a comparison device to determine a fitting position on the object, positioned at the fitting position with the tool, thereby being fitted to the object.

Stacked circuit board structures and methods of assembly are described. In an embodiment, a stacked circuit board structure includes first circuit board and a second circuit board including a plurality of pins mounted thereon, and the plurality of pins are secured in a plurality of receptacles that are coupled with the first circuit board to provide electrical connection between the first circuit board and the second circuit board.

A controller for an e-machine of a turbomachine including a support structure, a printed circuit board, and a fastener arrangement that retains the printed circuit board on the support structure, the fastener arrangement including a resilient member that resiliently biases the printed circuit board towards the support structure.

A substrate support structure includes: a substrate support including: a support body; and a protrusion including a base portion and a leading-end portion, the protrusion protruding from the support body; and a substrate having: a substrate body; a through hole provided at the substrate body; and a protruded portion surrounding the through hole, the protruded portion protruding from a first face of the substrate body, in which the base portion of the protrusion passes through the through hole, and the leading-end portion protrudes from the first face of the substrate body inside the protruded portion and engages with the substrate body such that the through hole is covered.

An apparatus includes a body having one or more protrusions from a surface of the body, wherein each of the protrusions has a corresponding coupling positioned at a corresponding end of each of the protrusions. The apparatus further includes one or more mechanical energy storage components, wherein each of the one or more mechanical energy storage components provide a force that is greater than an external force exerted on the apparatus.

A circuit board device includes a fixing member and a circuit board having a first hole. The fixing member includes abase having a second positioning portion and an opening, a first fixing component and a pillar structure having a first pillar body and a positioning pillar extending downward from the first pillar body and having a first positioning portion and a clamping portion. The clamping portion clamps the circuit board with the first pillar body when the first positioning portion is engaged with the first hole. The base is disposed in the first hole and abuts against the positioning pillar when the second positioning portion hooks the first hole and the opening is engaged with the positioning pillar. The first fixing component is detachably inserted into the pillar structure for clamping a first interface card with the first pillar body.