Circuit board coupling structure

A circuit board coupling structure for coupling a plurality of circuit boards,

• each of the plurality of circuit boards having a first principal surface and a second principal surface opposite to the first principal surface, and the plurality of circuit boards being disposed such that the first and second principal surfaces are perpendicular to a coupling direction of the plurality of circuit boards,
• a first connector being mounted on the first principal surface, a second connector being mounted on the second principal surface, and each of the first connector and the second connector having a plurality of terminals and a housing holding the plurality of terminals,
• the first connector and the second connector being fitted in and connected to each other with one direction parallel with the first and second principal surfaces as an insertion-removal direction,
• adjacent ones of the circuit boards being electrically connected in such a manner that the first and second connectors facing each other in the coupling direction are fitted in and connected to each other,
• the housing of the first connector having a first guide locking portion, and the housing of the second connector having a second guide locking portion, and
• the first and second guide locking portions being configured to guide each other in the insertion-removal direction in a course of fitting and connecting the first and second connectors and be locked to each other in the coupling direction in a state of the first and second connectors being fitted in and connected to each other.