Locking spring piece for isolating switch

The utility model discloses a locking spring piece for an isolating switch, which structurally comprises an annular part and a mandrel connecting piece connected with the annular part, the mandrel connecting piece comprises a sheet body, a shaft hole is arranged on the sheet body, a reinforcing unit positioned at the position of the shaft hole is arranged on the sheet body, and the mandrel connecting piece is connected with the annular part. The contact area between the mandrel connecting piece and the rotary disconnecting switch mandrel is increased through the reinforcing unit, and the reinforcing unit is provided with a surrounding structure consistent with the shaft hole in configuration. 本实用新型公开了一种用于隔离开关的锁紧弹簧件，其结构包括有环形部件以及与环形部件相连接的芯轴连接件，芯轴连接件包括片体且片体上开设有轴孔，片体上设置有位于轴孔处的加强单元，以通过加强单元增加芯轴连接件与旋转隔离开关芯轴的接触面积，加强单元具有与轴孔构型一致的合围结构。