Switch structure of cover and charging connector

An opening/closing structure (1A) for a cover, comprising a housing (2), a cover (3) rotatably supported by the housing (2), and a biasing member (43) configured to apply a biasing force in the vicinity of a rotating shaft (42) of the cover (3), at least one of a support portion (32), which is a cover-side sliding contact portion, and a sliding contact member (45), which is a biasing member-side sliding contact portion, is provided with: an open position maintaining device configured to maintain the cover (3) at the open position by the biasing force of the biasing member (43); the reaction force applying device is configured to apply a reaction force to the cover (3) in the closing direction through the biasing member (43) in response to further movement of the cover (3) from the open position in the opening direction. 盖的开关结构(1A)，包括壳体(2)、可旋转地支承于壳体(2)的盖(3)以及被配置为向盖(3)的旋转轴(42)附近施加偏置力的偏置部件(43)，其中，在作为盖侧滑动接触部的支承部(32)和作为偏置部件侧滑动接触部的滑动接触部件(45)中的至少一者设置有打开位置维持装置和反作用力施加装置，打开位置维持装置被配置为通过偏置部件(43)的偏置力将盖(3)维持于打开位置处，反作用力施加装置