Ancient(Old style) Chinese Lock No.1/ 中国古锁 No.1

When I encountered this type of lock in Chinese television dramas, I became intrigued by its structure.

I endeavored to discover some information to discern its operational mechanism.

My research ultimately led me to attempt the creation of a model mirroring this design, incorporating the fundamental principles of its operation.

To facilitate direct printing, I incorporated supports for all components of this model except for the key.
The gap between the support components is 0.2mm.
If your printer possesses a lower accuracy, you may need to implement some adjustments.

Please note: overall scaling will impact the gap between the supports and the top and bottom surfaces.

You may need to rescale the supports along the Z-axis to ensure the appropriate gap.
 

The assembled model should be readily assembled following printing. If you encounter difficulties in unlocking or closing the mechanism, repeated insertions and removals will improve its functionality.

Note: 
The lock cylinder structure necessitates a degree of strength and cannot be positioned vertically due to the limited bond strength in the Z-axis direction.
The lock housing component can be printed vertically, facilitating one-step molding.
To ensure the realization of these two requirements, support components (depicted in yellow within the image) have been incorporated for them.

Only the key requires support; the remaining components do not.
Promptly detach the support sections upon the completion of printing.

In fact, I have iterated through two revisions, crafting a version featuring smaller locking holes: 

and a version with more complex locking holes: 
 

Ultimately, this lock is incapable of securing anything; the PLA material is inherently fragile.

However, you might consider employing it to orchestrate a surprise for your roommate upon their departure from their seat:

Enjoy~ ^-^

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Upon encountering this type of lock in Chinese television dramas, I became interested in its structural design.
I sought out information to comprehend its operational mechanism.

Ultimately, I attempted to create a model incorporating the fundamental principles of its operation.

To facilitate direct printing, I incorporated supports for all components except the key.
The gap between these support components is 0.2mm.
If your printer exhibits lower accuracy, you may need to implement adjustments.

Please note: overall scaling will result in a change to the gap between the supports and the top and bottom surfaces.

In such a case, you may need to rescale the supports along the Z-axis to maintain the appropriate gap.

Following printing, the assembly should be easily accomplished. If you encounter difficulties in unlocking or closing the mechanism, repeated insertions and removals will improve its functionality.

Points to note:
The lock cylinder structure necessitates a degree of strength; consequently, considering the limited bond strength in the Z-axis direction, it cannot be positioned vertically.
The lock housing component can be printed vertically, facilitating one-step molding.
To ensure the realization of these two requirements, support components (represented in yellow within the image) have been incorporated.

Only the key necessitates support; the remaining components do not.
Promptly detach the support sections upon the completion of printing.


In fact, I have iterated through two revisions, crafting a version featuring smaller locking holes
and a version with more complex locking holes.
Ultimately, this lock is incapable of securing anything, as the PLA material is inherently fragile.
However, you could consider employing it to orchestrate a surprise for your roommate upon their departure from their seat.


Enjoy~ ^-^