Abstract: In a first series circuit of a power supply control device, a first switch and a first resistor are connected in series. In a second series circuit, a second switch and a second resistor are connected in series. The second series circuit is connected in parallel to the first series circuit. An electric current detection circuit detects an electric current value of an electric current flowing through the first resistor. In a case where specific data is stored in a storage unit, a control unit (open failure detection unit) detects an open failure of the first switch or the second switch on the basis of the electric current value detected by the electric current detection circuit. In a case where the storage unit does not store the specific data, the control unit does not detect the open failure.

Abstract: A power supply control device controls power supply through two branch paths branched from a common power supply path. Two N-channel FETs are respectively disposed in the two branch paths. A booster circuit outputs a voltage from a common output end, and applies a voltage to gates of the two FETs through a circuit resistor. Two charge resistors are respectively disposed in two applying paths through which a voltage is applied from the output end of the booster circuit to the gates of the two FETs. Each of two diodes are respectively connected between both ends of each of the two charge resistors. Cathodes of the two diodes are disposed on the side of the booster circuit.

Abstract: A relay circuit includes a relay and a current divider. The relay includes a coil and a contact. The contact is configured to switches on and off a supply of power to a load that is configured to operate with power supplied from a direct-current power supply through conduction of the coil. The current divider is connected between the contact and the load and configured to split a current supplied from the power supply to the load. The current divider incudes a resistor and a capacitor connected in series and grounded.

Abstract: In a first series circuit of a power supply control device, a first switch and a first resistor are connected in series. In a second series circuit, a second switch and a second resistor are connected in series. The second series circuit is connected in parallel to the first series circuit. An electric current detection circuit detects an electric current value of an electric current flowing through the first resistor. In a case where specific data is stored in a storage unit, a control unit (open failure detection unit) detects an open failure of the first switch or the second switch on the basis of the electric current value detected by the electric current detection circuit. In a case where the storage unit does not store the specific data, the control unit does not detect the open failure.

Abstract: A relay driver circuit is connected between an upper stage relay and a lower stage relay and is configured to be driven in response to driving of the upper relay. The relay driver circuit drives the lower stage relay. The relay driver circuit includes a semiconductor component, a control input line, a protective component, and a buffer circuit. The semiconductor component switches on and off the lower relay. The control input line is electrically connected to a control terminal of the semiconductor component. A power supply voltage is applied to the control input line via the upper stage relay. The protective component is connected in the control input line to protect the semiconductor component. The buffer circuit is connected between the protective component in the control input line and the control terminal of the semiconductor component to compensate for a voltage drop due to the protective component.

Abstract: An electrical connection box includes a box body for accommodating an electrical part, and one or a plurality of connection terminals provided on at least one surface of the box body, in which the box body has a lid body provided on one surface different from the one surface on which the connection terminal is provided, the lid body has a shape of a polygonal plate, and a flow path for a liquid is provided along at least one side of the lid body on the inner surface side of the lid body. The flow path may be defined by a first wall erected on the inner surface side of the lid body along an edge of the one side of the lid body, and a second wall separated from the first wall and erected on the inner surface side of the lid body along the first wall.

Abstract: A power supply control device includes a control unit that executes determination processing that, when an operation instruction is received from a switch input detection unit, determines, in a case in which the switch circuit is turned on, whether or not a power source voltage value will decrease to or below an acceptable voltage value on the basis of a power source voltage value obtained from a voltage detection unit and a load current value stored in a storage unit in advance; and in the determination processing, executes switch control processing which allows the switch circuit to be turned on if the power source voltage value is determined to not decrease to or below the acceptable voltage value and does not allow the switch circuit to be turned on if the power source voltage value is determined to decrease to or below the acceptable voltage value.

Abstract: A power supply control device includes a control unit that executes determination processing that, when an operation instruction is received from a switch input detection unit, determines, in a case in which the switch circuit is turned on, whether or not a power source voltage value will decrease to or below an acceptable voltage value on the basis of a power source voltage value obtained from a voltage detection unit and a load current value stored in a storage unit in advance; and in the determination processing, executes switch control processing which allows the switch circuit to be turned on if the power source voltage value is determined to not decrease to or below the acceptable voltage value and does not allow the switch circuit to be turned on if the power source voltage value is determined to decrease to or below the acceptable voltage value.

Abstract: A relay driver circuit is connected between an upper stage relay and a lower stage relay and is configured to be driven in response to driving of the upper relay. The relay driver circuit drives the lower stage relay. The relay driver circuit includes a semiconductor component, a control input line, a protective component, and a buffer circuit. The semiconductor component switches on and off the lower relay. The control input line is electrically connected to a control terminal of the semiconductor component. A power supply voltage is applied to the control input line via the upper stage relay. The protective component is connected in the control input line to protect the semiconductor component. The buffer circuit is connected between the protective component in the control input line and the control terminal of the semiconductor component to compensate for a voltage drop due to the protective component.

Abstract: A relay circuit includes a relay and a current divider. The relay includes a coil and a contact. The contact is configured to switches on and off a supply of power to a load that is configured to operate with power supplied from a direct-current power supply through conduction of the coil. The current divider is connected between the contact and the load and configured to split a current supplied from the power supply to the load. The current divider incudes a resistor and a capacitor connected in series and grounded.

Abstract: A power supply control device controls power supply through two branch paths branched from a common power supply path. Two N-channel FETs are respectively disposed in the two branch paths. A booster circuit outputs a voltage from a common output end, and applies a voltage to gates of the two FETs through a circuit resistor. Two charge resistors are respectively disposed in two applying paths through which a voltage is applied from the output end of the booster circuit to the gates of the two FETs. Each of two diodes are respectively connected between both ends of each of the two charge resistors. Cathodes of the two diodes are disposed on the side of the booster circuit.

Abstract: In a substrate-side housing of a plug connector and a housing of a socket connector, an abutment receiving portion and a columnar projection are provided to disable the socket connector from being inserted into the substrate-side housing when the socket connector is misaligned beyond a movable range of a fitting-side housing of the plug connector.

Abstract: A plug connector includes a substrate-side housing, a fitting-side housing, a plurality of terminals having movable springs. The fitting-side housing is formed by a plurality of divided housings. The fitting-side housing is formed by a plurality of divided housings moveable separately in a width direction of the connector. The substrate-side housing includes a receiving chamber that receives the divided housings therein and an abutment receiving portion against which the divided housings displaced inside the receiving chamber abut. The terminals are disposed in each of the divided housings, and have contact portions inside the substrate-side housing and the divided housings, and the contact portions are to be in conductive contact with the connection object. The movable springs support each of the divided housings displaceably relative to the substrate-side housing.

Abstract: A plug connector includes a substrate-side housing, a fitting-side housing, a plurality of terminals having movable springs. The fitting-side housing is formed by a plurality of divided housings. The fitting-side housing is formed by a plurality of divided housings moveable separately in a width direction of the connector. The substrate-side housing includes a receiving chamber that receives the divided housings therein and an abutment receiving portion against which the divided housings displaced inside the receiving chamber abut. The terminals are disposed in each of the divided housings, and have contact portions inside the substrate-side housing and the divided housings, and the contact portions are to be in conductive contact with the connection object. The movable springs support each of the divided housings displaceably relative to the substrate-side housing.

Abstract: In a substrate-side housing of a plug connector and a housing of a socket connector, an abutment receiving portion and a columnar projection are provided to disable the socket connector from being inserted into the substrate-side housing when the socket connector is misaligned beyond a movable range of a fitting-side housing of the plug connector.

Abstract: A junction connector includes a first connector-fitting chamber configured to mate with first connectors. The first connector-fitting chamber has first male terminals connected to first female terminals of the first connectors, respectively. The junction connector includes a second connector-fitting chamber configured to mate with second connectors. The second connector-fitting chamber has second male terminals connected to second female terminals of the second connectors, respectively. The first male terminals and the second male terminals are connected to each other.

Abstract: Disclosed is an engagement drive cam to establish an initial engagement position of a pair of connector housings at the time of engaging the pair of connector housings having the engagement drive cam. The engagement drive cam having cam grooves is arranged on a female connector housing so as to be turnable around a support shaft. Driven pins entering into the cam grooves are arranged on a male connector housing A. Colliding stepped portions for colliding against the drive pins are arranged at entrance portions of the cam grooves, so that the colliding stepped portions are on a line of engagement direction passing through the support shaft.

Abstract: The low-operating-force connector consists of a pair of female and male housings. The male housing has on the opposite sides driven pins, while the female housing has pin guide grooves for the driven pins. A cam member is rotatably mounted on the female housing, which consists of levers each including a cam groove and a lever handle connecting the levers. The housings are fitted with or separated from each other through rotation of the cam member. A pair of resilient locking pieces are provided on the outer periphery of the male housing, the locking pieces each including an engagement projection, while a corresponding pair of engagement portions are provided on the lever handle. Springs are so provided between the levers of the cam member and the female housing as to urge the cam member into an upright opened position. On completion of the coupling of the female and male housings, the cam member is locked by the engagement between the engagement projections and portions.

Abstract: A switch connector assembly with a waterproof structure which prevents admission of water thereinto without certainty and complete fitting between male and female connectors can be confirmed readily. The female connector has a short-circuiting terminal extending into a connector fitting chamber thereof and further has a temporary arresting projection and a flexible locking arm having a final arresting projection thereon. The male connector has a connecting terminal, a flexible engaging pawl, and an engaging portion. The short-circuiting terminal and the connecting terminal are kept out of contact with each other when the temporary arresting projection is fitted with the flexible engaging pawl, but contact with each other when the final arresting projection is fitted with the engaging portion.