Some ancient Chinese splitting
spring padlocks were designed with
letter-shape keyholes on the side-end
of the lock-body, such as "
", … etc. They were made
for users of various social classes.
The shape of Chinese character "
" was used by the civilians, "
was used by intellectual class, and "
" was used by the nobles and high
rank officials. The shape of Chinese
" was used in weddings,
and the shape of Chinese character "
" was used to pray for the bliss of good
health and long life. Furthermore,
there are significant shapes of keyholes
for various ruling classes such as
the emperors and kings, generals
and ministers, the oldest princes,
royal families, queens, princes and
princesses, … etc.
Some ancient locks were named after
the shapes of their keyholes. For
instances, the locks with keyholes of
the letter "
" shape was called the "
letter locks"; the locks with keyholes
of the letter "
" shape were called "
letter locks". Therefore, "
locks" are locks with keyholes of the
" shape. The key of a "
letter lock" was usually designed as one
" letter or double - "
This is a unique and complicated design
with a key-head the shape of the letter "
" to squeeze on the splitting springs.
Such a lock was often presented on
birthdays as a gift of good wishes on
endless happiness and long life.