54 lines
2.4 KiB
OpenSCAD
54 lines
2.4 KiB
OpenSCAD
/*
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* Latch
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*
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* Copyright (C) 2024 Matthias Neeracher <microtherion@gmail.com>
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*/
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$fn = $preview ? 32 : 64;
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module _top_post(thickness, axis, ridge, funnel, tol) {
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overlap = ridge+tol;
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dia = 2*thickness+axis;
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f_diag = (axis+2*funnel)/sqrt(2);
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difference() {
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union() {
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translate([0, -dia/2, 0]) cube([thickness, dia, dia/2+overlap]);
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translate([thickness, 0, dia/2+overlap]) rotate([0, -90, 0]) cylinder(h=thickness, d=dia);
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}
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translate([thickness, 0, dia/2+overlap]) rotate([0, -90, 0]) cylinder(h=thickness, d=axis+tol);
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translate([0, 0, dia/2-axis/2+overlap]) cube([thickness, dia/2, axis]);
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translate([0, dia/2, dia/2+overlap+tol]) rotate([-45, 0, 0]) translate([0, -f_diag/2, -f_diag/2]) cube([thickness, f_diag, f_diag]);
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}
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}
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module latch_top(spacing=10, thickness=3, axis=2.5, ridge=.5, funnel=.7, tol=.2) {
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translate([spacing/2, 0, 0]) _top_post(thickness, axis, ridge, funnel, tol);
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translate([-spacing/2-thickness, 0, 0]) _top_post(thickness, axis, ridge, funnel, tol);
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}
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module latch_tongue(length=20, width=10, thickness=3, axis=2.5, ridge=.5, tol=.2) {
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overlap = ridge;
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translate([width+thickness, 0, thickness/2]) rotate([0, -90, 0]) cylinder(h=width+2*thickness, d=axis);
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hull() {
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translate([width-tol, 0, thickness/2]) rotate([0, -90, 0]) cylinder(h=width-tol, d=thickness);
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translate([width-tol, length+thickness-.5, .5]) rotate([0, -90, 0]) cylinder(h=width-tol, d=1);
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translate([0, thickness/2, thickness/2]) cube([width-tol, length+thickness/2, thickness/2]);
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}
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translate([0, length, thickness]) cube([width-tol, thickness, overlap+ridge-.5]);
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hull() {
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translate([width-tol, length, thickness+overlap+ridge/2]) rotate([0, -90, 0]) cylinder(h=width-tol, d=ridge);
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translate([width-tol, length+thickness-.5, thickness+overlap+ridge-.5]) rotate([0, -90, 0]) cylinder(h=width-tol, d=1);
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}
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}
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module latch_catch(width=10, thickness=3, axis=2.5, ridge=.5, tol=.2) {
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overlap = ridge;
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translate([-width/2, 0, 0]) cube([width-tol, thickness, (thickness+ridge)/2+overlap]);
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translate([width/2-tol, 0, thickness/2+overlap]) rotate([0, -90, 0]) cylinder(h=width-tol, d=ridge);
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}
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translate([-8, -20, 0]) cube([16, 24.25, 3]);
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translate([0, 0, 3]) latch_top();
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translate([20, 0, 0]) mirror([0, 1, 0]) latch_tongue();
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translate([0, -20, 3]) latch_catch();
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