GUIDE CAM DEVICE, AND ON-BOARD DEVICE USING THE GUIDE CAM DEVICE

A guide cam device includes a cam groove, a projection, and a restriction member. The cam groove includes: first, second, and third grooves, the second and third grooves branching forward from the first groove; and a locking recess positioned between a forward end of the second groove and a forward end of the third groove. The projection is configured to move forward and backward in the cam groove and enter a locked state upon entering the locking recess. The restriction member is configured to inhibit entry of the projection from the first groove to the third groove and permit the projection to advance from the first groove to the second groove. In response to being pushed by the projection that exits the locking recess and moves backward in the third groove, the restriction member is deformed or moved to enable the projection to move to the first groove.