A battery connector has contact elements and an insulative housing. The insulative housing defines channels and assembling grooves nearby the channels. Guiding elements are movably mounted in the channels for guiding the contact elements. Soldering elements are assembled on the assembling grooves. The contact elements include engaging ends and contact ends. The engaging ends are fixed on the guiding elements near the mating surface, and the contact ends have portions extending beyond the channels from the mating surface. The soldering elements at least have abutting portions contacting the contact ends of the contact elements all along. Spring elements are assembled to the guiding elements for providing the guiding elements with return force. Correspondingly, the overall height of the battery connector reduces, thereby meeting the tendency of miniature.

A memory card connector has an insulative frame, a plurality of conductive terminals received in the insulative frame, an ejecting device for guiding a memory card in or out, and a shell shielding the insulative frame. A normal-open type activation switch is mounted on the insulative frame and includes a first pin and a second pin identical and parallel to each other. The first pin and the second pin respectively have bases, contact arms, interferential arms and soldering arms. The contact arms bend perpendicularly from the bases and further bend inversely to form suspending branch arms. The branch arms respectively have arcuate portions at substantially middle thereof and free ends.

A card connector has an insulative frame, a plurality of conductive terminals received in the insulative frame, an eject device assembled on the insulative frame and a shell covering the insulative frame. The eject device includes a driving rod, a driven shaft, a driven sleeve, a slider and a resilient element. The driving rod axially defines a 90 degree first continuous chute, and the driven shaft axially defines a 90 degree second continuous chute for meshing with the first continuous chute. The driven sleeve is fixed on the insulative frame and telescopically meshes with the driven shaft. The slider is cantileveredly mounted on the driving rod. During insertion of the card, the driving rod drives the driven shaft to rotate. A stop block of the driven sleeve disengages from an abutting portion of the slider, and thereafter engages with a wedging hole of the card. Thus, the card in final position is protected against exterior reverse shock.