Wire-to-board connector assembly

1. A connector assembly comprising:

a first connector including a first housing and first terminals, the first terminals being embedded in the first housing; and

a second connector including a second housing and second terminals, the second terminals being embedded in the second housing, the second terminals contacting the first terminals,

the second housing having a second side panel extending in a mating direction and at least three second connector lock portions protruding from an outer surface of the second side panel, the second connector lock portions each being arranged in a transverse direction of the second housing and separated by an interval, and

the first housing including a first side panel extending in the mating direction, a locking arm portion formed in the first side panel and covering at least a portion of the outer surface of the second side panel of the second housing when the first housing and the second housing are mated, and at least three first connector locking portions each formed in the locking arm portion in the transverse direction of the first housing and separated by an interval, and each engaging a second connector lock portion when the first housing and the second housing are mated.

2. The connector assembly according to claim 1 , wherein the second connector lock portions have similar side profiles and are formed in the same position relative to the mating direction, and the first connector locking portions have similar side profiles and are formed in the same position relative to the mating direction.

3. The connector assembly according to claim 1 , wherein each second connector lock portion has at least one second central lock portion and a pair of second end lock portions on both ends, and each first connector locking portion has at least one first central locking portion and a pair of first end locking portions on both ends.

4. The connector assembly according to claim 3 , wherein the locking arm portion includes a main body portion having no opening, a first end locking portion protruding from both left and right ends of a front end section of the main body portion, and the first central locking portion is an inner surface of the main body portion opposing at least some of the outer surface of the second side panel of the second housing when the first housing and the second housing are mated.

5. The connector assembly according to claim 4 , wherein the first end locking portion and the second end lock portion engage each other visibly from outside of the locking arm portion, and the first central locking portion and the second central lock portion engage each other non-visible from outside of the locking arm portion when the first housing and the second housing are mated.

6. The connector assembly according to claim 1 , wherein the second housing includes another side panel facing the second side panel, and a slide fitting portion formed at a position corresponding to the second connector lock portion in the other side panel, the slide fitting portion being a ridge-like protruding key or trench-like key groove, and

the first housing includes a trench-like key groove or ridge-like protruding key fitting into the slide fitting portion.

7. The connector assembly according to claim 1 , wherein the first connector is a wire connector connecting the first terminals to electrical wires, and the second connector is a board connector connecting the second terminals to a board.