Intermediate electrical connector device and its connecting structure

An electrical connector assembly comprising,

• a fixed connector to be attached to a circuit member of an electronics device, said fixed connector including a first engagement portion, said first engagement portion including a first arm portion and a first claw portion disposed on a distal end portion of the first arm portion;
• a middle connector connected to the fixed connector along a first direction, said middle connector including a second engagement portion and a third engagement portion, said second engagement portion engaging the first engagement portion with a first engagement force, said middle connector being arranged to be movable in a second direction perpendicular to the first direction for a specific distance with respect to the fixed connector so that the second engagement portion is disengaged from the first engagement portion when the middle connector moves with respect to the fixed connector;
• and
• a plug connector connected to the middle connector along the first direction, said plug connector including a fourth engagement portion engaging the third engagement portion with a second engagement force smaller than the first engagement force,
• wherein said first arm portion extends from a side surface of the fixed connector along the side surface to form a space in between so that the first arm portion deforms in the second direction when the middle connector moves with respect to the fixed connector.