Resin molded parts with lock arm, connector using it and method for forming resin molded parts with lock arm

Abstract

In resin molded parts with lock arms, a peripheral wallprotruding toward a rear side vertical to a main body part is connected to the peripheral edge of the substantially plate shaped main body part. Belt plate shaped lock armsare connected to the peripheral wall with ends protruding toward a front side vertical to the main body part by connecting base endsto the outer surfaces of the peripheral wall. The lock arms have slitswhich are formed in intermediate parts of the lock arms in the direction of width of the lock arms and continuously extend from the end faces of the base ends of the lock arms to parts before the ends to ensure engaging partsin the ends of the lock arms. When the resin molded parts with the lock arms is formed, the main body part and the lock arms are formed by opening and closing metal molds from a front surface side and a rear surface side of the main body part, the lock arms are formed so as to have shapes more obliquely curved outward toward the ends of the lock arms and the slits are formed by a slit forming part provided in the metal mold of the rear surface side.