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Anti-Drop Phone Strap with 2-Way Locking Structure

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P1S
A1
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X1 Carbon
X1
A1 mini
X1E
H2D Pro
H2S
P2S
H2C
X2D
A2L

0.2mm layer, 2 walls, 15% infill
0.2mm layer, 2 walls, 15% infill
Designer
19 min
1 plate

Open in Bambu Studio
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Released 

Description

The model details are just below—feel free to scroll down!

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1. Problem & Purpose

Smartphone drops happen instantly — and regret lasts.
This strap is designed to solve one simple but critical issue:
Don’t drop your phone.

2. Concept & Core Functionality

This is a single-part, soft-material strap that loops through your smartphone case.
Slip it on your finger, and it will automatically tighten during a fall to keep your phone secure.

What makes this strap different:

  • Two distinct modes — one for movement, one for security.
  • Switched by your finger — not an app, not a button. Just motion.
  • Pinch and pull the strap to switch modes instantly.

3. Dual Modes: Safety and Freedom

You don’t choose the shape. You choose the purpose.

Strap Mode – Usability First

  • Loop stays loose
  • Ideal for everyday use: light, flexible, unintrusive
    Priority: Comfort > Safety

Tightening Mode – Protection First

  • Pinch and pull the strap to release the lock and switch to tightening mode
  • The loop tightens and grips your finger automatically during a drop
    Priority: Safety > Comfort

The strap lets you control the balance between freedom and protection.

4. Design Highlights

  • Switch modes without removing the strap
  • One-way catch mechanism inside the slit controls loop tension
  • T-shaped stopper holds firmly in most smartphone cases
  • No glue, screws, or tools required
  • One flexible, support-free part — easy to print, easy to assemble

5. Printing Details

Designed for fast, flexible printing and material freedom.

  • Print time: ~20 minutes
  • Compatible with Bambu Lab A1 mini / A1 / P1 / X1 series (or any 18cm x 18cm+ build plate)
  • Tested in TPU (Shore 95A)
    → Other TPU hardness levels are also compatible. Please feel free to test based on your environment.

No need to tweak slicer settings — just drop in the 3MF and print.

6. Use Cases

  • One-handed operation while commuting
  • Preventing accidental drops in bed or on the move
  • Hanging from bags or belts
  • Ideal for kids, seniors, or anyone with small hands

7. Assembly Instructions

  1. Pass the narrow tail through the slit to form a loop
  2. Insert the T-shaped stopper into the inside of your phone case
  3. Slip your finger through the loop
  4. Pinch and pull to switch to tightening mode when needed

No adhesives, no hardware — fully hand-assembled in seconds.

8. Closing Message

This strap makes "not dropping your phone" your default.
Through thoughtful geometry — not electronics — it adapts to you.

Wear it to stay safe.
Pinch it to engage protection.
Let your finger guard your phone — we turned that instinct into a form

Note: This strap is designed to greatly reduce the risk of accidental drops, but no system can guarantee 100% protection. Please use it with awareness of your surroundings and usage style.

 

 

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License

This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.