Patent ID: 7270550

Claim:
A board to board connector, comprising: a dielectric housing having an upper surface and a bottom surface, a plurality of terminal passages passing through the upper surface and the bottom surface, the terminal passages including a first receiving groove which connects with the bottom surface of the dielectric housing, a second receiving groove extending from the first receiving groove, a third receiving groove extending from the second receiving groove, a first stop wall being defined on the location where the first receiving groove connects with the second receiving groove, a second stop wall being defined on the location where the second receiving groove connects with the third receiving groove; and a plurality of terminals received in the terminal passages, each terminal having a fixed holding portion, the fixed holding portion including a base portion, a first fixed arm and a second fixed arm extending from the lateral sides of base portion respectively, a notch formed among the base portion, the first fixed arm and the second fixed arm; a compressed portion extending from the lower end of the fixed holding portion, the compressed portion including a first elastic arm which extends downwardly from the fixed holding portion, a first bended portion extending from the end of the first elastic arm, a second elastic arm which is parallel to the first elastic arm extending from the end of the first bended portion, a second bended portion extending from the end of the second elastic arm, a third elastic arm extending from the end of the second bended portion, a second contact portion extending from the end of the third elastic arm and protruding out from the bottom surface of the dielectric housing; a winding portion extending from the upper end of the fixed holding portion, the winding portion including a first elastic beam which protrudes upwardly from the top of the fixed holding portion, a first curving portion extending upwardly from the end of the first elastic beam, a second elastic beam extending from the end of the first curving portion and being parallel to the first elastic beam, a second curving portion extending upwardly from the end of the second elastic beam, a third elastic beam extending from the end of the second curving portion and being parallel to the first elastic beam; a first contact portion extending from the top of the winding portion and protruding out from the upper surface of the dielectric housing, the first contact portion including a base plate which extends from the top of the winding portion, a contact point extending upwardly from the middle of the base plate.