Lever-type connector

A lever-type connector, comprising:

• a housing (20) connectable to a mating housing (90) and including shafts (33) projecting on opposite side surfaces and outward deformation preventing walls (35) each with an open inner space (37) on the side of the shaft (33);
• and
• a U-shaped lever (60) having a coupling (61) and two arm plates (62) projecting from opposite ends of the coupling (61) and assembled with the housing (20) to be rotatable about the shafts (33) to an assembled position, an initial position and a connection position, the arm plates (61) being resiliently fit to the shafts (33) after being deformed outward due to interference with the shafts (33) and the lever (60) being assembled to straddle the housing (20) with the arm plates (61) accommodated in the inner spaces (37) of the outward deformation preventing walls (35) at the assembled position, the arm plates (61) being engaged with the mating housing (90) at the initial position and the lever being rotated from the initial position toward the connection position while keeping an engaged state, thereby exhibiting a force multiplying action to proceed with a connecting operation of the two housings (20, 90);
• each arm plate (61) including a thin portion (66) that enters the inner space (37) of the outward deformation preventing wall (35) at the assembled position and a thick portion (68) that enters the inner space (37) of the outward deformation preventing wall (35) when moving from the initial position toward the connection position and contacts the outward deformation preventing wall (35) when the arm plate (61) is deformed excessively out.