Card edge connector having improved ejector

A card edge connector comprising:

• a longitudinal insulative housing having a central slot extending along a longitudinal direction for insertion of a memory module and a pair of tower portions extending upwardly from two longitudinal ends thereof, each tower portion comprising a pair of outer walls extending along a height direction and a receiving slot formed between the outer walls, each outer wall comprising a thick lower wall and a thin upper wall extending upwardly from the lower wall, the lower wall having a recess recessed at an upside thereof and a circular hole recessed on the recess;
• a plurality of contacts retained in the insulative housing for mating with the memory module;
• and
• a pair of ejectors being rotatablely received in the receiving slot in the longitudinal direction, each ejector comprising a main portion, an ejecting portion extending from a lower end of the main portion for ejecting the memory module out of the central slot, a locking portion extending from an upper end of the main portion for latching the memory module into the central slot, and a lever portion extending from the upper end of the main portion and opposite to the locking portion for being handled by a hand or others easily, the main portion comprising an upper wide portion corresponding to the upper walls and a lower narrow portion corresponding to the lower walls, the narrow portion defining a pair of spindles formed at two sides thereof and being rotatablely received in the respective circular holes in a loose fit condition;
• wherein
• the narrow portion of each ejector has a pair of standoffs formed at the two sides thereof, each standoff defines a horizontal surface abutting against a corresponding horizontal resisting surface formed at a bottom side of the recess so as to align centers of the corresponding spindle and circular hole when the ejector rotates inwardly.

A card edge connector for use with a memory module, comprising:

• an elongated insulative housing extending along a lengthwise direction with a card receiving slot along said lengthwise direction for receiving said memory module;
• a plurality of contacts disposed in the housing by at least one side of the card receiving slot;
• a tower portion formed at one end of the housing and defining an ejector receiving cavity between two sides thereof in a transverse direction perpendicular to said lengthwise direction;
• a pair of circular holes formed in the tower portion and located by two sides of the ejector receiving cavity, each of said circular holes being formed, in said transverse direction, by an upper semi-circular surface in an outer side and a lower semi-circular surface in an inner side in an intimate side by side manner;
• an upward resisting surface formed on an inner face of each side of the tower portion beside the circular hole in a side view along the transverse direction while aligned with the lower semi-circular surface in the lengthwise direction;
• and
• an ejector pivotally located in the corresponding ejector receiving cavities, respectively, said ejector defining, on each of two opposite sides thereof, a circular spindle diametrically smaller than the circular hole for pivoting the ejector with regard to the housing, an upper locking portion for locking into a notch of said memory module, a lower ejection portion for ejecting said memory module, and a downward pressing surface located beside the spindle;
• wherein
• when the ejector is rotated to an inner locking position, the downward pressing surface of the ejector abuts against the upward resisting surface of the tower portion, and thus ideally and theoretically a center of the spindle is aligned with a center of the circular hole with a tiny gap between bottom portions of said spindle and said circular hole.