Safety assembly for lock

The invention provides a safety assembly for a lock. The safety assembly comprises a main rod and a positioning part. When a door is closed, a spring bolt part retracts inwards, the spring bolt part releases positioning of a locking part, a user only needs to rotate a door body to the door closing position, the lock can be in a door closing state automatically, the user can complete door closing without holding a handle, when the positioning part rotates to the first position, a positioning portion abuts against a first shifting wheel or a second shifting wheel, when the positioning part of the lock is located at the first position, the first shifting wheel or the second shifting wheel which is not connected with the positioning portion in an abutting mode can rotate, even if the lock is in a locked state, the first shifting wheel or the second shifting wheel can be driven through the handle to open the door lock, and escape can be carried out in emergency situations. 本发明提供的用于锁具的保险组件包括主杆与定位件。关门时，锁舌件内缩，锁舌件解除对锁