名词
中文翻译：锁扣装置
同义词：
['latching mechanism', 'locking gear']
例句：
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1. The car's latch gear was damaged during the accident.
汽车在事故中损坏了锁扣装置。
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2. The new design of the door uses a latch gear to ensure secure closure.
新设计的门使用了锁扣装置来确保安全关闭。
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3. The latch gear on the hinge is what allows the door to open and close smoothly.
铰链上的锁扣装置是使门能够顺畅开合的关键。