A connector is equipped with a housing capable of being fitted in a mating connector, a plurality of terminals which are held in the housing and electrically connected to each other, and a noise reduction member or members which are held in the housing. The mating connector is connected to brunch lines among a trunk line and the brunch lines constituting an electric circuit. One of the plurality of terminals is a trunk-line connection terminal which is a pressure contact terminal and is electrically connected to the trunk line directly, and a remaining terminals are branch-line connection terminals which are male terminals or female terminals and are electrically connected to the respective branch lines when the housing is connected to the mating connector. The noise reduction member is not disposed at the trunk-line connection terminal, and the noise reduction member is disposed at the branch-line connection terminal.

A connector including: a conductive portion that is brought into pressure contact with a bus bar and is electrically connected to the bus bar when the bus bar is inserted into an inserted portion; and a pressing portion configured to be displaceable to a first position and a second position, and receives a force acting from the bus bar when the bus bar is inserted into the inserted portion, is displaced from the first position to the second position, and presses the conductive portion at the time of the displacement to elastically deform at least a part of the conductive portion, in which the conductive portion is configured to cause, when pressed by the pressing portion and elastically deformed, an elastic force generated with the elastic deformation to act on the bus bar to increase a contact pressure with respect to the bus bar.

A connector including: a conductive portion that is brought into pressure contact with a bus bar and is electrically connected to the bus bar when the bus bar is inserted into an inserted portion; and a pressing portion configured to be displaceable to a first position and a second position, and receives a force acting from the bus bar when the bus bar is inserted into the inserted portion, is displaced from the first position to the second position, and presses the conductive portion at the time of the displacement to elastically deform at least a part of the conductive portion, in which the conductive portion is configured to cause, when pressed by the pressing portion and elastically deformed, an elastic force generated with the elastic deformation to act on the bus bar to increase a contact pressure with respect to the bus bar.

A connector assembly suppresses electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB). Certain embodiments of the connector assembly include common features such as conductive through-holes on the PCB, and a connector having terminal pins positionable through the conductive through-holes. The first embodiment includes a magnetic wafer positionable between the connector and the PCB. The second embodiment includes a plurality of stackable magnetic wafers positionable in a stack between the connector and the PCB. The third embodiment includes a magnetic cup wafer positionable between the connector and the PCB. The fourth embodiment, combines the cup wafer with the stackable magnetic wafers of the second and third embodiments. Each magnetic wafer includes wafer holes for the terminal pins to pass through. The magnetic wafers are configured to increase inductance and provide effective EMI noise suppression.

A connector assembly suppresses electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB). The connector assembly includes a plurality of conductive through-holes on the PCB, a connector, and a magnetic collar. The plurality of conductive through-holes are electrically connected to the electronic circuitry on the PCB. The connector has a plurality of terminal pins extending from a connector surface. The plurality of terminal pins and conductive through-holes may be aligned. The terminal pins are positioned through the conductive through-holes to electrically connect the terminals pins to the electronic circuitry. The magnetic collar surrounds the connector. The magnetic collar may also abut the PCB. The magnetic collar suppresses EMI on voltages propagating through the connector.

A noise reduction unit (100) is equipped with a noise filter (10), a housing (80) which houses the noise filter, and a sealing material (90) which is charged in the housing. The noise filter is equipped with conductors (20) having respective winding portions (21) and a ring-shaped core (30) which is made of a magnetic material and is inserted through the winding portions of the conductors. In the housing, a mounting portion (83) for the ring-shaped core has recesses (84) that are recessed in a direction going away from the ring-shaped core and support portions (83b) that support the ring-shaped core so that gaps (S) are formed between the ring-shaped core and the bottom surfaces of the respective recesses. The sealing material goes into the gaps and comes into contact with both of the ring-shaped core and the bottom surfaces of the recesses in the mounting portion.

A noise filter including a conductor and an annular core. The conductor has a wound portion. The annular core is formed of a magnetic material and passes through the wound portion. The annular core is formed of a pair of split cores that are assembled together with joining surfaces on both ends to be joined to each other. At least one of a recess portion and a projection portion that engage with each other is formed on the joining surfaces of the split cores which are joined to each other.

A noise filter including a conductor and an annular core. The conductor has a wound portion. The annular core is formed of a magnetic material and passes through the wound portion. The annular core is formed of a pair of split cores that are assembled together with joining surfaces on both ends to be joined to each other. At least one of a recess portion and a projection portion that engage with each other is formed on the joining surfaces of the split cores which are joined to each other.

A connector includes a conductor, a noise filter part, an inner mold part, and a housing. The conductor has a terminal at one end and the other end of the conductor is connected to a wire. The connector is to be joined with a counterpart connector so that the terminal is in conduction with a terminal of the counterpart connector. The noise filter part includes a core attached to the conductor and formed of a magnetic member which reduces noise of a current flowing in the conductor. The inner mold part is integrally molded with the noise filter part so as to cover at least a periphery of the core and formed of a soft resin material. The housing which covers a periphery of the inner mold part and is formed of a hard resin material.

A wire connection structure includes a ring-shaped magnetic body, a first wire having a first wire end portion which is inserted through the ring-shaped magnetic body from a first direction, a second wire having a second wire end portion which is inserted through the ring-shaped magnetic body from a second direction opposite to the first direction, and a conductive member which is disposed outside the ring-shaped magnetic body and has two end portions that are electrically connected to a conductor of the first wire end portion and a conductor of the second wire end portion respectively.