Electrical connector for circuit boards and electrical connector assembly for circuit boards

1. An electrical connector for circuit boards disposed on a mounting face of a circuit board, with a counterpart connector connected thereto such that a direction of connection is a direction perpendicular to the mounting face, wherein the electrical connector for circuit boards comprises:

a plurality of connector elements arranged in a single array direction parallel to the mounting face and a support used for supporting the plurality of connector elements;

the connector elements have a plurality of terminals arranged in a connector-width direction perpendicular to the array direction, as well as a stationary retainer and a movable retainer made of an electrically insulating material, which are used to secure the terminals in place;

the terminals have connecting portions connected to the mounting face at one end in the direction of connection of the terminals and contact portions brought in contact with counterpart terminals at another end in the direction of connection, the contact portions being secured in place on a lateral face of the movable retainer and secured in place by the stationary retainer between the movable retainer and the connecting portions, with flexible portions formed between the movable retainer and the stationary retainer;

the connector elements have provided therein a sheet metal member located on another lateral face opposite to the lateral face on which the contact portions are located; the sheet metal member has a parallel plate portion, which extends in the connector-width direction throughout at least a portion of a terminal array range, and a biasing portion, which is formed by folding back in an edge portion of the parallel plate portion in a through-thickness direction and faces the parallel plate portion; and,

when the connector is connected to the counterpart connector, the biasing portion applies pressure to another adjacent connector element with a biasing force, as a result of which its reaction force brings the contact portions in contact with, and applies contact pressure to, the counterpart terminals of the counterpart connector.

2. The electrical connector for circuit boards according to claim 1 , wherein the connector elements are paired with other adjacent connector elements and disposed such that the surfaces, on which the biasing portions are provided, face each other.

3. The electrical connector for circuit boards according to claim 2 wherein the paired connector elements are such that the counterpart terminals of the counterpart connector are located on both external sides, on which the contact portions of the two connector elements are located.

4. The electrical connector for circuit boards according to claim 1 , wherein the movable retainer, at its ends in the connector-width direction, has formed therein mounting portions formed as recesses or openings open in the array direction of the connector elements, and

the sheet metal member, at its ends in the connector-width direction, has mountable portions secured in place by press-fitting into the mounting portions of the movable retainer in the array direction of the connector elements.

5. An electrical connector assembly for circuit boards, comprising:

an electrical connector disposed on a mounting face of a circuit board, with a counterpart connector connected thereto such that a direction of connection is a direction perpendicular to the mounting face, the electrical connector, comprising:

a plurality of connector elements arranged in a single array direction parallel to the mounting face and a support used for supporting the plurality of connector elements;

the connector elements have a plurality of terminals arranged in a connector-width direction perpendicular to the array direction, as well as a stationary retainer and a movable retainer made of an electrically insulating material, which are used to secure the terminals in place;

the terminals have connecting portions connected to the mounting face at one end in the direction of connection of the terminals and contact portions brought in contact with counterpart terminals at another end in the direction of connection, the contact portions being secured in place on a lateral face of the movable retainer and secured in place by the stationary retainer between the movable retainer and the connecting portions, with flexible portions formed between the movable retainer and the stationary retainer;

the connector elements have provided therein a sheet metal member located on another lateral face opposite to the lateral face on which the contact portions are located; the sheet metal member has a parallel plate portion, which extends in the connector-width direction throughout at least a portion of the terminal array range, and a biasing portion, which is formed by folding back in an edge portion of the parallel plate portion in a through-thickness direction and faces the parallel plate portion; and,

when the connector is connected to the counterpart connector, the biasing portion applies pressure to another adjacent connector element with a biasing force, as a result of which its reaction force brings the contact portions in contact with, and applies contact pressure to, the counterpart terminals of the counterpart connector;

and the counterpart connector, comprising connector elements of a same construction as the electrical connector.