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大部分之鑰匙孔是開放式
的，有些則是隱藏式的。開放
式鑰匙孔可直接由鎖體表面找
到；隱藏式鑰匙孔大多以一底
板、端板覆蓋，必須先找到開
啟底板、端板的方法，再滑動
底板、旋轉端板以顯現出鑰匙
孔。簡單的設計，只要移動鎖
體底部的平板，即可順利的找
到鑰匙孔；複雜的設計，則必
須先作動鎖體上的某一按鈕，
以些微拉開鎖栓，才能轉動端
板，並滑動底板以顯現出鑰匙
孔。
有些古鎖是以其鑰匙孔的
位置來命名，如鑰匙孔開在背
面者稱為「背開鎖」，鑰匙孔
開在上面者稱為「上開鎖」。
Most ancient Chinese splitting
spring padlocks have open keyholes
and keys can be inserted directly
to open the locks. However, some
locks were designed with hidden
keyholes. A hidden keyhole is
usually covered with a plate. The
plate has to be found first. Then,
the plate should be rotated or slid
to reveal the keyhole. For a simple
design, one can slide the bottom
plate of the lock to reveal the
keyhole. For a complicate design,
a button on the lock-body should be
located and pressed to release the
locking pin of the end plate first.
Then, the end plate can be rotated
for the bottom plate to slide to reveal
the keyhole.
Some anc i ent locks were
named according to the positions
of the keyholes. For examples, the
keyhole of a "back-opening lock"
appears in the backside of the lock-
body, and the keyhole of a "top-
opening lock" appears in the topside
of the lock-body.
‧隱藏式鑰匙孔
Hidden keyhole
82x42x19mm 251g
‧開放式鑰匙孔
Open keyhole
62x38x27mm 119g