Abstract: A liquid discharge head includes a nozzle plate, a liquid chamber substrate, a diaphragm plate, and a piezoelectric element. The nozzle plate has multiple nozzle holes from each of which a liquid is dischargeable in a discharge direction. The multiple nozzle holes are arrayed in an array direction. The liquid chamber substrate has a first face on the nozzle plate, multiple liquid chambers respectively communicating with the multiple nozzle holes, multiple chamber region in which the multiple liquid chambers are respectively disposed, and a non-chamber region outside the multiple chamber region. The diaphragm plate is disposed on a second face of the liquid chamber substrate. The piezoelectric element includes a first electrode over the diaphragm plate, a piezoelectric body on the first electrode, and a second electrode on the piezoelectric body. The first electrode has patterned openings disposed between adjacent liquid chambers in the array direction in the non-chamber region.

Abstract: An electronic device module that is connected to a battery pack including a high voltage battery is provided with a conductive path electrically connected to the battery pack, a branch part electrically connected to the conductive path, a plurality of branch paths electrically connected to the branch part, a circuit board electrically connected to at least one of the plurality of branch paths, and a plurality of branch connectors electrically connected to the plurality of branch paths, the circuit board including a plurality of power conversion units that convert power.

Abstract: Provided is a circuit structure with a new structure that can improve a heat dissipation efficiency of a heat generating component while having resistance to a reaction force of a thermally conductive member. Provided is a circuit structure including: a heat generating component; bus bars that are connected to connection portions of the heat-generating component; cases that accommodate the heat-generating component and the bus bars; an elastic thermally conductive member that comes into thermal contact with the bus bars; a pressing portion that is provided on the cases and brings the bus bars into contact with the thermally conductive member; and a reinforcing wall portion that protrudes outside of the cases and reinforces the pressing portion.

Abstract: An electrical junction box includes a circuit board, a branch circuit assembly for distributing power to various devices, a housing that accommodates the circuit board and the branch circuit assembly, and a board-side connector module in which a plurality of board-side connectors mounted on the circuit board are formed as a single body. The branch circuit assembly includes an internal circuit including busbars and an electrical component, a case that accommodates the internal circuit, and a plurality of relay connectors that protrude from the case, are electrically connected to the internal circuit, and are respectively connected to the plurality of board-side connectors, and the board-side connectors are connected to the corresponding relay connectors in a state in which the branch circuit assembly and the circuit board are assembled to the housing.

Abstract: An electrical junction box includes: a branch circuit assembly that distributes battery power to various devices; a housing that accommodates the branch circuit assembly; an opening portion extending through a side wall of the housing; a lid that closes the opening portion; and a plurality of external connection connectors that are fitted to through-holes extending through the lid and protrude from an outer surface of the lid, in which the branch circuit assembly is fixed to an inner surface of the lid, a plurality of connection portions provided in the branch circuit assembly are connected to connection terminals of the corresponding external connection connectors, and an external connection connector module includes the plurality of external connection connectors, the lid, and the branch circuit assembly.

Abstract: A circuit assembly that dissipates heat with improved efficiency compared to a conventional structure while securing waterproofing is disclosed. The circuit assembly includes a case including an opening hole in a bottom portion thereof, a heat generating component that is housed inside the case, is exposed to the outside from the opening hole, and is in thermal contact with an external heat dissipator, and an annular sealing member that is disposed at a peripheral edge portion of the opening hole and is interposed between the case and an attached member that is attached to the case.

Abstract: A liquid discharge head includes: a first member; and a second member bonded to the first member, wherein the first member has: a first protrusion protruding to the second member, a second protrusion protruding to the second member, the second protrusion having a height different from the first protrusion, the second member includes: a first portion bonded to the first protrusion with a first adhesive; and a second portion bonded to the second protrusion with a second adhesive, the second portion having a height different from the first portion, and a type of the second adhesive is different from a type of the first adhesive.

Abstract: An electrical connection box includes a case; a power supply circuit; and a branch circuit, wherein the branch circuit includes a detachable overcurrent protection element and branches from the power supply circuit; the case includes a case body, a cover detachably attached to the case body, and a cover sealing member having elasticity; the case body includes a first working hole and houses the power supply circuit and the branch circuit; the first working hole is formed at a position that allows the overcurrent protection element to face outward and is formed with external shape dimensions smaller than external shape dimensions of a ceiling plate; the cover is installed on the case body such that the first working hole is closed; and the cover sealing member is brought into close contact with a peripheral edge portion of the first working hole of the case body and the cover.

Abstract: A liquid discharge head includes: a first substrate having a joint region; a sheet member having a first face joined to the first substrate with a joining agent applied to the joint region of the first substrate; and a second substrate joined to a second face opposite to the first face of the sheet member and the first substrate, the sheet member interposed between the first substrate and the second substrate, wherein the second substrate has a gap facing the second face of the sheet member opposite to a portion of the first face of the sheet member joined to the joint region of the first substrate across the sheet member.

Abstract: A DC circuit switching apparatus is connected between an automobile battery and a motor-side circuit and cuts off current that flows in two directions. The DC circuit switching apparatus includes a breaker that cuts off current, a first voltage holding circuit, which is constituted by a first diode and a first capacitor that are connected in series, that is provided in parallel to the breaker and is configured to allow power supply from the automobile battery to the motor-side circuit, and a second voltage holding circuit, which is constituted by a second diode and a second capacitor that are connected in series, that is provided in parallel to the breaker and is configured to allow power supply from the motor-side circuit to the automobile battery.

Abstract: A liquid discharge head includes: a nozzle plate including a nozzle; a liquid chamber substrate having an individual chamber; a diaphragm; a piezoelectric actuator including a piezoelectric body, a wiring portion covering a first region of the piezoelectric actuator; and a protective film covering a second region of the piezoelectric actuator other than the first region. A first outer periphery of the piezoelectric body in the second region is interior of a second outer periphery of the individual chamber in the second region. A gap region between the first outer periphery and the second outer periphery has: a first gap region having a first width in the longitudinal direction; and a second gap region having a second width in a transverse direction orthogonal to the longitudinal direction, the second width larger than the first width. The protective film covers a part of the first gap region in the second region.

Abstract: A first busbar includes a first electrical connection portion that is electrically connected to a main relay, a first heat transfer connection portion that is thermally connected to the insulating plate, and a first detour portion that connects the first electrical connection portion and the first heat transfer connection portion to each other. A second busbar includes a second electrical connection portion that is electrically connected to the main relay, a second heat transfer connection portion that is thermally connected to the insulating plate, and a lateral detour portion and a lower detour portion that connect the second electrical connection portion and the second heat transfer connection portion to each other.

Abstract: A circuit structure with a novel structure is disclosed in which a measure against arcs can be implemented with a simple structure and a reduction in size and cost can be realized. A circuit structure including: a power supply line configured to connect a battery and a load; a main relay connected to the power supply line; a pre-charge circuit including a pre-charge resistor and a pre-charge relay connected in series, and connected in parallel to the main relay; and a sub relay connected in parallel to the pre-charge resistor.

Abstract: A power distribution module including: a power line connecting between a battery and a load; a main relay connected to the power line; an active fuse connected to the power line on the battery side relative to the main relay; a first voltage converter connected to the power line on the load side relative to the main relay; an abnormality detection unit configured to detect an abnormality of the power line; and a first driving/control wiring extending from the first voltage converter and connected to the active fuse, wherein a first control unit mounted on the first voltage converter transmits a control signal for disconnecting the active fuse when the abnormality detection unit detects an abnormality of the power line, and the active fuse is disconnected.

Abstract: Provided is a relay connector including a relay terminal including a first connection portion configured to connect to a first device side terminal and a second connection portion configured to connect to a second device side terminal; a clamping member including a first clamping portion configured to clamp the first device side terminal together with the first connection portion and a second clamping portion configured to clamp the second device side terminal together with the second connection portion; a lower case configured to hold the relay terminal; and an upper case configured to hold the clamping member, wherein a connector case includes a first insertion opening and a second insertion opening; and guide portions are formed on the clamping member, the guide portions guiding the first device side terminal inserted from the first insertion opening and the second device side terminal inserted from the second insertion opening.

Abstract: A liquid discharge head includes: a first member; and a second member bonded to the first member, wherein the first member has: a first protrusion protruding to the second member, a second protrusion protruding to the second member, the second protrusion having a height different from the first protrusion, the second member includes: a first portion bonded to the first protrusion with a first adhesive; and a second portion bonded to the second protrusion with a second adhesive, the second portion having a height different from the first portion, and a type of the second adhesive is different from a type of the first adhesive.

Abstract: Provided is a circuit structure with a new structure that can improve a heat dissipation efficiency of a heat generating component while having resistance to a reaction force of a thermally conductive member. Provided is a circuit structure including: a heat generating component; bus bars that are connected to connection portions of the heat-generating component; cases that accommodate the heat-generating component and the bus bars; an elastic thermally conductive member that comes into thermal contact with the bus bars; a pressing portion that is provided on the cases and brings the bus bars into contact with the thermally conductive member; and a reinforcing wall portion that protrudes outside of the cases and reinforces the pressing portion.

Abstract: Disclosed is a circuit assembly having a novel structure capable of more reliably promoting heat dissipation from a heat generating component, using a short heat transfer path. A circuit assembly includes: a heat generating component that generates heat when energized; a conductive member configured to be connected to a connection portion of the heat generating component; and a cooling component configured to allow a coolant to flow therethrough and is in thermal contact with the conductive member.

Abstract: An electrical connection box 10 of the present disclosure includes a case; a power supply circuit; and a branch circuit, wherein the branch circuit is a circuit that includes a detachable overcurrent protection element and branches from the power supply circuit; the case includes a case body, a cover 23 detachably attached to the case body, and a cover sealing member 24 having elasticity; the case body includes a first working hole 44 and houses the power supply circuit and the branch circuit; the first working hole 44 is formed at a position that allows the overcurrent protection element to face outward and is formed with external shape dimensions smaller than external shape dimensions of a ceiling plate 41; the cover 23 is installed on the case body in a manner such that the first working hole 44 is closed; and the cover sealing member 24 is brought into close contact with a peripheral edge portion of the first working hole 44 of the case body and the cover 23.

Abstract: A circuit structure of the present disclosure includes: a heat-generating member; at least one connection conductor; at least one insulative heat transfer member; and an insulative base member. The heat-generating member generates heat as a result of being energized, the connection conductor is connected to the heat-generating member in a heat-transferable state, the heat transfer member is formed in the shape of a heat-transferable sheet, the base member includes a base main body and a positioning portion, the base main body, together with the connection conductor, sandwiches the heat transfer member, and the positioning portion is formed so as to protrude from the base main body, and positions the connection conductor relative to the base main body as a result of coming into contact with the connection conductor.