Swing lid locking mechanism

Abstract

A swing lid locking mechanism prevents the lid of a container from accidentally opening when shocks act on the container. The swing lid locking mechanism comprises one of a pair of support legs formed integrally with the lid body of the lid and pivotally supported by support pins on the side wall of the container body, provided with a locking projection; and an impact locking device comprising a bottomed case provided with a longitudinal slot in one side wall thereof, a locking weight provided with a groove in an upper part of the outer side surface thereof across the width and a stopping projection in a middle part of the outer side surface, and axially slidably inserted in the case so that the stopping projection is received in the longitudinal slot of the bottomed case, and a spring compressed between the lower end of the locking weight and the bottom wall of the case. The bottomed case is attached to the outer surface of one side wall of the case body so that the front side of the locking weight is positioned behind and substantially contiguous with the first locking projection of the support leg at a position corresponding to the closed position of the lid of the container with the groove of the locking weight aligned with the locking projection of the support leg. The locking weight moves into the case by inertia when shocks act on the container.