/Boxes/Clip.foocad

A clip to keep a hinged box closed.

Glue the two orange piece to a hinged box, so that it can be closed

Notes

I've not tried this (yet).

My original hinged box had the orange piece built-in, which don't work very well. Alas, I never got around to trying this solution.

FooCAD Source Code

import static uk.co.nickthecoder.foocad.chamferedextrude.v1.ChamferedExtrude.*

class Clip : Model {
    
    @Custom( about="Size of the pegs (length and height" )
    var size = Vector2( 40, 20 )

    @Custom( about="Gap between the two pegs" )
    var gap = 2.0

    @Custom( about="How much smaller are the pegs compared to the slots the go inside" )
    var slack = 0.3

    @Custom( about="Thickess of the peg's back plate, which will be stuck to the box")
    var backT = 1.0

    @Custom(about="Radius of the slider")
    var radius = 2.0

    @Piece
    fun slide() : Shape3d {
        val pegs : Shape3d = pegs()

        val pegT = size.y / 7

        val pegsP = pegsProfile(false)
        val insideP = pegsP.offset(slack)
        val outsideP = Square( pegsP.size.x - backT + pegT - slack, pegsP.size.y + pegT *2 )
            .roundCorner(2,radius)
            .roundCorner(1,radius)
            .centerY().leftTo(backT+slack)

        val end = outsideP.chamferedExtrude(pegT, radius/2, 0)
        val mid = (outsideP-insideP).extrude(size.x).bottomTo(end.top)

        val exit = Cube( pegs.size.x+slack, mid.size.y, pegs.size.z + slack * 2 )
            .bottomTo( mid.bottom ).frontTo(gap/2)

        return end + mid - exit + end.mirrorZ().bottomTo(mid.top)
    }

    fun pegsProfile( forPegs : bool ) : Shape2d {

        val pegT = size.y / 7
        val roundR = if (forPegs) pegT*0.7 else 0

        return (
            Square( backT, pegT*3 ) +
            Square( backT +pegT, pegT).translateY(gap/2) +
            Square( pegT, pegT*2 ).translateX( backT + pegT ).translateY(gap/2)
                .roundCorner(2,roundR)
                .roundCorner(1,roundR)
        ).mirrorY().also()
    }

    @Piece
    fun pegs() : Shape3d {
        val pegLength = size.x*0.4

        val profile = pegsProfile(true)

        return profile.extrude( pegLength ).color("Orange")
    }

    override fun build() : Shape3d {
        val slide : Shape3d = slide()
        val pegs : Shape3d = pegs().translateZ(1.7)

        return slide + pegs
    }
}