Lockable connector assembly and lockable connector

A lockable connector assembly comprising a first connector and a second connector which is matable with the first connector in a first direction;

• wherein the first connector comprises:
• a first insulating housing, having a fitting opening into which at least a portion of the second connector is to be inserted;
• at least one first contact held by the first insulating housing;
• and
• a connector position assurance member having a tongue, the connector position assurance member being pivotably mounted on the first insulating housing about an axis parallel to a second direction perpendicular to the first direction and pivotably movable between a first position and a second position;
• wherein the second connector comprises:
• a second insulating housing including a housing body and a locking arm, the locking arm being disposed on one side of the housing body in the second direction with a gap being formed between the locking arm and the housing body;
• and
• at least one second contact held by the second insulating housing, wherein the at least one second contact is brought into electrical contact with the at least one first contact when the second connector is mated with the first connector;
• wherein the locking arm is formed with a first engagement portion and is normally biased in the second direction to a latched position, such that when the second connector is mated with the first connector, the first engagement portion is engaged with a second engagement portion formed on the first connector, preventing detachment of the second connector from the first connector, and when the locking arm is biased away from the latched position, the first engagement portion is disengaged from the second engagement portion, allowing removal of the second connector from the first connector;
• in a case that the second connector is mated with the first connector and the locking arm is in the latched position, the tongue is positioned out of the gap when the connector position assurance member is pivoted to the first position, allowing the locking arm to be biased away from the latched position, and the tongue is positioned in the gap when the connector position assurance member is pivoted to the second position, preventing the locking arm from being biased away from the latched position.