Card connector

A card connector assembly comprising:

• upper and lower connector units stacked with each other;
• an upper metallic shell located on the upper connector unit and defining an upper receiving space for retaining an upper card;
• a lower metallic shell located under the lower connector unit and defining a lower receiving space for retaining a lower card;
• a partition plate placed between the upper receiving space and the lower receiving space;
• a pair of ejecting mechanisms located on front lateral edge areas of said upper shell and said lower shell, respectively;
• and
• a stand off fastened to both side surfaces extending, respectively, upwardly from a top surface of the upper metallic shell and downwardly from a lower surface of the lower metallic shell, and adapted to not only retain both upper and lower connector units upon a printed circuit board also fasten both said upper and lower connector units together;
• wherein the upper metallic shell comprises a locking piece;
• wherein the lower metallic shell comprises a locking piece;
• wherein the stand off comprises a pair of locking devices engaging with the locking pieces of the first and second shells;
• wherein each locking device of the stand off comprises a clasping hole extending along a first direction and a cantilever elastic beam extending along the first direction and disposed above or below of the clasping hole, and each of the locking pieces comprises a first locking piece and a second locking piece to be locked with the elastic beams and the clasping holes, respectively;
• wherein the stand off comprises a pair of first gaps opposite to the elastic beams along the first direction, and the first locking pieces are received in the first gaps;
• wherein each elastic beam comprises a spring header facing to the first gap, and a side surface of the first locking piece collides with an end surface of the spring header;
• wherein an outer surface of the spring header is in a same plane with an outer face of the first locking piece;
• and
• wherein the stand off comprises a pair of second gaps communicating with corresponding clasping holes, and the second locking pieces are received in the second gaps.

A card connector assembly comprising:

• upper and lower connector units stacked with each other;
• an upper metallic shell located on the upper connector unit and defining an upper receiving space for retaining an upper card;
• a lower metallic shell located under the lower connector unit and defining a lower receiving space for retaining a lower card;
• a partition plate placed between the upper receiving space and the lower receiving space;
• a pair of ejecting mechanisms located on front lateral edge areas of said upper shell and said lower shell, respectively;
• and
• a stand off fastened to both said front lateral edge areas to not only retain both upper and lower connector units upon a printed circuit board also fasten both said upper and lower connector units together;
• wherein
• each of said upper and lower shell is of an L-shaped configuration, and said front lateral edge area is located at a cutout corner of said L-shaped configuration where is far away from two opposite outermost lateral edges of the corresponding shell in both a transverse direction and a front-to-back direction of the corresponding shell;
• wherein the upper metallic shell comprises a locking piece;
• wherein the lower metallic shell comprises a locking piece;
• wherein the stand off comprises a pair of locking devices engaging with the locking pieces of the first and second shells;
• wherein each locking device of the stand off comprises a clasping hole extending along a first direction and a cantilever elastic beam extending along the first direction and disposed above or below of the clasping hole, and each of the locking pieces comprises a first locking piece and a second locking piece to be locked with the elastic beams and the clasping holes, respectively;
• wherein the stand off comprises a pair of first gaps opposite to the elastic beams along the first direction, and the first locking pieces are received in the first gaps;
• wherein each elastic beam comprises a spring header facing to the first gap, and a side surface of the first locking piece collides with an end surface of the spring header;
• wherein an outer surface of the spring header is in a same plane with an outer face of the first locking piece;
• and
• wherein the stand off comprises a pair of second gaps communicating with corresponding clasping holes, and the second locking pieces are received in the second gaps.