Patent ID: 7374442

Claim:
A memory card socket structure comprising: a case having a card accommodating portion for receiving a thin plate-shaped memory card; a contact block having contact terminals for the connection with electrodes of the memory card; and a movable arm rotatably installed at the contact block and moved in combination with an insertion and an extraction of the memory card into and from the card accommodating portion, wherein the memory card socket structure has a memory card detecting function for detecting whether the memory card is inserted into the card accommodating portion by way of switching an opening/closing of a circuit depending on the movement of the movable arm, wherein the movable arm includes a main arm portion to be in contact with a rear side of the memory card and a sub arm portion disposed opposite to the main arm portion with respect to a rotation shaft disposed at a rear portion of the card accommodation portion, and the movable arm is supported at an inner wall of the contact block such that an end portion of the main arm portion is moved in a direction of the insertion and the extraction of the memory card into and from the card accommodating portion between a position where the movable arm is fully rotated toward an entrance side of the card accommodating portion and an mounted position near the rear side of the card accommodating portion, wherein the rotation shaft of the movable arm is engaged with a torsion spring formed of a conductive material, and when a first end portion of the torsion spring is engaged with a first stationary contact provided at the contact block and a second end portion thereof is engaged with the sub arm portion, the main arm portion of the movable arm is rotatingly biased by the torsion spring toward the entrance side, and wherein as the second end portion of the torsion spring is rotated along with the sub arm portion to be connected or disconnected with a second stationary contact provided at the contact block, the opening/closing of the circuit including the first stationary contact, the torsion spring and the second stationary contact is switched.