Connector assembly with dimension-reduced transverse wall for easy and safe withdrawal of the board inserted therein

A connector assembly at least comprising:

• a first and a second card edge connectors (20, 10), each including an elongated housing having a central slot (27) therein, and a plurality of contacts (26) arranged along two sides of the slot (27), said first and second connectors (20, 10) lengthwise aligned and juxtaposed with each other on a mother board (3) for respectively receiving at least two separate regions (43',42') of a lower edge portion of a unitary daughter board (4), said regions (43', 42') having different contact pitch arrangements thereof, said first connector (20) having higher contact density arrangement than the second connector (10) for electrical engagement with the region (43') of the daughter board which is of a smaller contact pitch arrangement than the other region (42');
• the improvement comprising:
• said first connector (20) including an outer end wall (21) positioned at an end thereof in a lengthwise direction and far from the second connector (30), said outer end wall (21) being recessed at the top to form a substantial space (25) thereof, a top surface (211) of the outer end wall (21) being much lower than a general top surface (24) of the first connector (20), so that said outer end wall (21) functions as a supporting pivot for stabilizing a rotative movement of the daughter board (4) without interference occurring thereof.