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Modular Snap-fit Blocks

by skaye, published

Modular Snap-fit Blocks by skaye Nov 15, 2012
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2315Views 548Downloads Found in Construction Toys

Summary

I have a two-year old daughter who loves playing with blocks and other construction toys. However, all of the block sets we've gotten her have either been too small for her to manipulate, require too much force to put together/take apart, and/or don't come in sufficient diversity of shapes.

I've been teaching my daughter about 3d Printing (she loves being able to ask for a toy and watch it print), so I decided to see if we could design a better snap-fit block for toddlers. I'll do the design and she'll be my beta-tester.

I've build openscad program so that the blocks can be made with any number of rows/columns.

Version 1:
5 sided rectangular solid with a raised cylinder to fit into the open side
Wall thickness - 2 mm
Edge - 25.4 mm
Height - 1.25 * edge
Cylinder_radius - edge/2-wall-0.1 (exact fit less 0.1 mm)

   Notes: cylinder is a little loose and walls are stiff. Will try version 2 with a tighter fit, bevel for easier press, and 1 mm walls.

Version 2:
5 sided rectangular solid with a raised cylinder to fit into the open side
Wall thickness - 1 mm
Edge - 25.4 mm
Height - 1.25 edge
Cylinder_radius - edge/2-wall-0.1 (exact fit less 0.1 mm)
Bevel - 0.85
cylinder_radius

Instructions

I printed on a Replicator 2, sliced using Makerware using MiracleGrue, medium quality, with supports. The part was oriented with the raised cylinder pointing towards the build platform for easier support removal.

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