Abstract: A high-frequency circuit includes a first dielectric layer, a circuit layer, a second dielectric layer arranged in this order, the circuit layer includes a transmission line of a high-frequency signal and a ground pattern disposed around the transmission line. An electromagnetic wave shield is disposed in the first dielectric layer and the second dielectric layer around the transmission line. The electromagnetic wave shield includes a first ground electric conductor formed on an inner surface of at least one first hole formed to extend through the first dielectric layer without extending through the ground pattern, and a second ground electric conductor formed on an inner surface of at least one second hole formed to extend through the second dielectric layer without extending through the ground pattern. The first ground electric conductor and the second ground electric conductor are each electrically connected to the ground pattern.

Abstract: A press-fit terminal inserted into through hole of a circuit board along insertion direction includes a base portion extending in insertion direction, distal end portion, and two deformable portions. The distal end portion is on a front side to base portion in insertion direction and includes distal end portion side corner portions. The two deformable portions connect base portion and distal end portion and are contacted with an inner wall of through hole and elastically deformed. The two deformable portions include deformable portion side corner portions and deformable portion side corner portions include outer deformable portion side corner portions on outer side in direction crossing insertion direction. The two deformable portions include easy deformable portions, in portions having outer deformable portion side corner portions with curved surfaces whose radius of curvature RL is greater than a radius of curvature RS of curved surfaces of distal end portion side corner portions.

Abstract: A light-emitting device includes one or more light-emitting elements having an optical axis, a mounting substrate on which the one or more light-emitting elements are placed on a first land pattern, one or more optical elements having an optical axis, a positioning member made of metal and configured to define a relative position between the one or more optical elements and the one or more light-emitting elements such that the optical axis of the one or more optical elements and the optical axis of the one or more light-emitting elements are aligned with each other, a second land pattern formed on the mounting substrate and configured to fix one surface of the positioning member, and a bonding member configured to fix the second land pattern and the positioning member to each other. The second land pattern is divided into a plurality of regions separated by a groove portion.

Abstract: Assembly parts for connector device including: substrate having through hole; press-fit terminal that is rod shape member to be press-fitted into through hole, wherein press-fit terminal includes leading end, press-fit, and base end portions, press-fit portion includes parallel portion with two parallel contact pieces separated by eye hole; and tapered portion connecting parallel and leading end portions together, in vertical cross section of press-fit terminal, eye hole with curved line constitutes leading end-side portion, lines constitute tapered portion include contact and reference points, contact points first come into contact with opening edge of through hole when press-fit terminal inserted into through hole, reference points are intersections of lines that constitute tapered portion and specific orthogonal lines, specific orthogonal lines are orthogonal lines passing through end points of curved line, of lines orthogonal to lines that constitute tapered portion, contact points are located closer to l

Abstract: A press-fit terminal includes a press-fit portion including two contact pieces facing each other with an eyehole interposed therebetween, where each of the two contact pieces includes a parallel portion, a front spring portion extending from the parallel portion in a direction in which the press-fit portion is inserted, and a rear spring portion extending from the parallel portion in a direction opposite to the direction in which the press-fit portion is inserted, the two parallel portions being parallel to each other, a thickness of the press-fit portion is 0.3 mm or more and 0.5 mm or less, when a length of the eyehole is Le [mm] and a length of the parallel portion is Ls [mm], Ls/Le is 0.57 or more and 0.65 or less, and when front spring strength is G1 [mm3] and rear spring strength is G2 [mm3], G1/G2 is 0.55 or more and 1.45 or less.

Abstract: A high-frequency circuit includes a first electric conductor layer, a first dielectric layer, a circuit layer, a second dielectric layer, a second electric conductor layer arranged in this order, and the circuit layer includes a ground pattern and a transmission line of a high-frequency signal. An electromagnetic wave shield is disposed around the transmission line. The electromagnetic wave shield includes a ground electric conductor on inner surfaces of a plurality of holes extending through the first dielectric layer, the ground pattern, the second dielectric layer, the first electric conductor layer, and the second electric conductor layer. The plurality of holes are a plurality of elongated holes provided at an interval in a direction in which the transmission line is surrounded. In each of the plurality of elongated holes, a longitudinal dimension in the direction in which the transmission line is surrounded is larger than a width dimension.

Abstract: A high-frequency circuit includes a first dielectric layer, a circuit layer, a second dielectric layer arranged in this order, the circuit layer includes a transmission line of a high-frequency signal and a ground pattern disposed around the transmission line. An electromagnetic wave shield is disposed in the first dielectric layer and the second dielectric layer around the transmission line. The electromagnetic wave shield includes a first ground electric conductor formed on an inner surface of at least one first hole formed to extend through the first dielectric layer without extending through the ground pattern, and a second ground electric conductor formed on an inner surface of at least one second hole formed to extend through the second dielectric layer without extending through the ground pattern. The first ground electric conductor and the second ground electric conductor are each electrically connected to the ground pattern.

Abstract: A press-fit terminal inserted into through hole of a circuit board along insertion direction includes a base portion extending in insertion direction, distal end portion, and two deformable portions. The distal end portion is on a front side to base portion in insertion direction and includes distal end portion side corner portions. The two deformable portions connect base portion and distal end portion and are contacted with an inner wall of through hole and elastically deformed. The two deformable portions include deformable portion side corner portions and deformable portion side corner portions include outer deformable portion side corner portions on outer side in direction crossing insertion direction. The two deformable portions include easy deformable portions, in portions having outer deformable portion side corner portions with curved surfaces whose radius of curvature RL is greater than a radius of curvature RS of curved surfaces of distal end portion side corner portions.

Abstract: A heating and hot-water supply apparatus performs a heating operation by heating a heating medium with a heater and circulating the heating medium through a heating terminal, a hot-water supply operation by circulating the common heating medium through a hot-water supply heat exchanger, heating service water through heat exchange with the heating medium, and supplying hot water, and a simultaneous operation of the heating operation and the hot-water supply operation, and controls a distribution ratio of the heating medium between the heating terminal and the hot-water supply heat exchanger. The apparatus determines whether the heating terminal proceeding in the heating operation is a suspendible terminal to suspend the heating operation or an unsuspendible terminal not to suspend the heating operation in response to a request for the hot-water supply operation.

Abstract: An object is to, for physical properties, holding force, contact area, and insertion force in a trade-off relationship, set the holding force to 37 N or more, the contact area to 0.72 mm2 or more, and the insertion force to 90 N or less. A press-fit terminal is to be press-fitted into a through hole formed in a circuit board. A press-fit part includes a beam and an eye hole that is surrounded by the beam. The beam includes two parallel parts that are parallel to each other. In the press-fit part, G1/G2 is 0.20 or more and 1.05 or less where a front-side spring strength is G1 [mm3] and a rear-side spring strength is G2 [mm3] calculated under the following conditions, and G is 0.007 mm3 or more and 0.012 mm3 or less where a spring strength G [mm3] is G1+G2.

Abstract: A printed wiring board of the present invention includes an insulating substrate layer; a first conductive layer laminated to one surface of the substrate layer; a second conductive layer laminated to another surface of the substrate layer; and a via hole formed along an inner surface of a connection hole that is provided, in a thickness direction, through the substrate layer and the first conductive layer, the via hole electrically coupling the first conductive layer and the second conductive layer. A cross-sectional shape of the connection hole along at least one surface of the substrate layer is an irregular shape.

Abstract: An object is to, for physical properties, holding force, contact area, and insertion force in a trade-off relationship, set the holding force to 37 N or more, the contact area to 0.72 mm2 or more, and the insertion force to 90 N or less. A press-fit terminal is to be press-fitted into a through hole formed in a circuit board. A press-fit part includes a beam and an eye hole that is surrounded by the beam. The beam includes two parallel parts that are parallel to each other. In the press-fit part, G1/G2 is 0.20 or more and 1.05 or less where a front-side spring strength is G1 [mm3] and a rear-side spring strength is G2 [mm3] calculated under the following conditions, and G is 0.007 mm3 or more and 0.012 mm3 or less where a spring strength G [mm3] is G1+G2.

Abstract: A heating and hot-water supply apparatus performs a heating operation by heating a heating medium with a heater and circulating the heating medium through a heating terminal, a hot-water supply operation by circulating the common heating medium through a hot-water supply heat exchanger, heating service water through heat exchange with the heating medium, and supplying hot water, and a simultaneous operation of the heating operation and the hot-water supply operation, and controls a distribution ratio of the heating medium between the heating terminal and the hot-water supply heat exchanger. The apparatus determines whether the heating terminal proceeding in the heating operation is a suspendible terminal to suspend the heating operation or an unsuspendible terminal not to suspend the heating operation in response to a request for the hot-water supply operation.

Abstract: A press-fit terminal includes an end part that is to be inserted into a through-hole of a circuit board. The end part is connected electrically to the through-hole by being in elastic contact with an inner wall of the through-hole. The press-fit terminal also includes a base part opposite to the end part. Two elastic contact pieces are between the end part and the base part and are disposed to face each other through an opening. A stress dispersion part is provided in at least one of a region that includes a border between the end part and the elastic contact pieces and a region that includes a border between the base part and the elastic contact pieces. The stress dispersion part protrudes in the same direction as an expanding direction in which the elastic contact pieces expand.

Abstract: A printed wiring board of the present invention includes an insulating substrate layer; a first conductive layer laminated to one surface of the substrate layer; a second conductive layer laminated to another surface of the substrate layer; and a via hole formed along an inner surface of a connection hole that is provided, in a thickness direction, through the substrate layer and the first conductive layer, the via hole electrically coupling the first conductive layer and the second conductive layer. A cross-sectional shape of the connection hole along at least one surface of the substrate layer is an irregular shape.

Abstract: A press-fit terminal includes an end part that is to be inserted into a through-hole of a circuit board. The end part is connected electrically to the through-hole by being in elastic contact with an inner wall of the through-hole. The press-fit terminal also includes a base part opposite to the end part. Two elastic contact pieces are between the end part and the base part and are disposed to face each other through an opening. A stress dispersion part is provided in at least one of a region that includes a border between the end part and the elastic contact pieces and a region that includes a border between the base part and the elastic contact pieces. The stress dispersion part protrudes in the same direction as an expanding direction in which the elastic contact pieces expand.

Abstract: Provided is a heat source device including a control unit which, in response to a predetermined request for heating, sets a switching valve to a first circulation mode to communicate first and third ports, whereas to cut off communication between second and third ports, and performs a heating operation by actuating a burner and a circulation pump. In response to a predetermined request for hot water supply, the control unit sets the switching valve to a second circulation mode to communicate second and third ports, whereas to cut off communication between first and third ports, and performs a hot water supply operation, by actuating the burner and the circulation pump. A hot water supply stop alarm unit issues a hot water supply stop alarm that urges a user to stop using hot water when the request for heating is continued for a first predetermined time or more.

Abstract: Provided is a heat source device including a control unit (51) which, in response to a predetermined request for heating, sets switching valve (21) to first circulation mode to communicate port (21a) and (21c), whereas to cut off communication between port (21b) and (21c), and performs heating operation by actuating burner (11) and circulation pump (22). In response to a predetermined request for hot water supply, the control unit (51) sets the switching valve (21) to second circulation mode to communicate ports (21b) and (21c), whereas to cut off communication between ports (21a) and (21c), and performs hot water supply operation, by actuating burner (11) and circulation pump (22). A hot water supply stop alarm unit (52) issues a hot water supply stop alarm that urges a user to stop using hot water when the request for heating is continued for a first predetermined time or more.

Abstract: An immediate hot-water supplying system 1 includes a P hot water supply device 10 configured to heat water flowing through a first supply pipe 2, an N hot water supply device 30 configured to heat water flowing through a second supply pipe 3, a check valve 6, and a coupled controller 60 configured to, when the flow amount detected by a second flow amount sensor 34 is equal to or more than a hot-water-supply detection flow amount, perform a hot-water supply operation in which a first burner 12 or a second burner 32 is burned with a circulation pump 16 stopped, and when the flow amount detected by the second flow amount sensor 34 is less than the hot-water-supply detection flow amount, perform a circulation heat keeping operation in which the first burner 12 is burned with the circulation pump 16 activated.

Abstract: A boiler connection system includes: a plurality of heat source device; and a controller. Each of the plurality of heat source devices includes: a first heat exchanger; a heat medium heating circuit branching at one end thereof from a heat medium return pipe and connected at another end thereof to a heat medium outgoing pipe via the first heat exchanger; a bypass pipe connected to the heat medium heating circuit so as to bypass the first heat exchanger; a pressure-feed device provided on the heat medium heating circuit; a flow passage switching valve; a second heat exchanger provided on the bypass pipe; and a water heating circuit branching at one end thereof from the water supply pipe and connected at another end thereof to a hot water supply pipe via the second heat exchanger.