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Childproof Door Latch (TPU)

An auto-locking safety latch for adventurous toddlers. Mount high on the door.
In the contest Flex It! (TPU Edition)
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updated February 22, 2026

Description

PDF

Features:

  • Auto-latching - you won't have to remember to close it.

  • Can be easily opened from both sides by adults and older kids (depending on install height).

  • Very strong when printed in TPU using thick walls and dense infill (I  recommend 100%)

Installation:

  • Check the placement carefully before permanent attachment so it locks properly and doesn't snag.

  • For the two smaller screws, use pan head screws with large heads, or use washers, otherwise the screw head might pull through the material. 

  • Remember to check the installation height with all family members.

Disclaimer: This model has no security or child safety certification. It can probably fail in many ways. Use at your own risk.

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Model origin

The author marked this model as their own original creation.

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