safety bolt

• 一种机械装置，通常为滑动的金属杆或插销，用于将门、大门或窗户固定在关闭位置，以防止未经授权的进入。

A mechanical device, typically a sliding metal bar or latch, used to secure a door, gate, or window in a closed position to prevent unauthorized entry.

1. Locking mechanismB1formal

   A metal bolt or bar that slides into a strike plate to secure a door or window, often used as an additional security measure.

   防盗插销

   • He slid the safety bolt across the door before going to bed.
   • The window has a safety bolt to prevent it from being opened from the outside.
   • Always check that the safety bolt is engaged when leaving the house.

2. Firearm safety deviceB2formal

   A component on a firearm that prevents accidental discharge by blocking the trigger or firing mechanism.

   保险栓

   • Before cleaning the gun, ensure the safety bolt is engaged.
   • The safety bolt on the rifle was stuck, so he took it to a gunsmith.
   • He disengaged the safety bolt before firing.