Low insertion/withdrawal-force connector

A low insertion/withdrawal-force connector comprising:

• a cam member including cam grooves which are continuous respectively with introduction grooves, are provided at a lower surface of a rotation plate, and are disposed symmetrically with respect to a rotation shaft;
• a pair of housing which are fittable together and disengageable from each other by angularly moving said cam member,
• said pair of housing having cam follower pins, respectively, which are engaged in said cam grooves of said cam member, respectively, one of said housings having a pin guide groove which guides said cam follower pin of the other housing and said rotation shaft of said cam member,
• wherein when said cam member is angularly moved in an initial fitting condition of said pair of housings in which said cam follower pins of said housings are engaged respectively in said pair of cam grooves, said cam member and the other housing move toward an inner end of said pin guide groove, and, attendantly said pair of housings are moved toward each other;
• and
• a flexible lock member, having a lock release projection, provided in said introduction groove of one of said cam grooves in said rotation plate, wherein said cam follower pin of the other housing is engaged with said lock release projection to release the engagement between said flexible lock member and said one housing at the time of the initial fitting of said pair of housings, thereby allowing the angular movement of said cam member.

A low insertion/withdrawal-force connector comprising:

• a cam member including cam grooves which are continuous respectively with introduction grooves, are provided at a lower surface of a rotation plate, and are disposed symmetrically with respect to a rotation shaft;
• a pair of housings which are fittable and disengageable from each other by angularly moving said cam member,
• said pair of housings having cam follower pins, respectively, which are engaged in said cam grooves of said cam member, respectively, one of said housings having a pin guide groove which guides said cam follower pin of the other housing and said rotation shaft of said cam member,
• wherein when said cam member is angularly moved in an initial fitting condition of said pair of housings in which said cam follower pins of said housings are engaged respectively in said pair of cam grooves, said cam member and the other housing move toward an inner end of said pin guide groove, and, attendantly, said pair of housings are moved toward each other;
• an angularly movement-effecting thumbpiece movably mounted on an upper surface of said rotation plate;
• and
• lock means provided between said one housing and said thumbpiece so as to lock said thumbpiece when said pair of housings are completely fitted together.