1 // Simple button cell battery holder
2 // Created 2017 Clinton Ebadi <clinton@unknownlamer.org>
4 // Released under the https://wiki.creativecommons.org/wiki/CC0
5 // To the extent possible under law, Clinton Ebadi has waived all
6 // copyright and related or neighboring rights to simple button cell
9 // Defaults have no tolerance, should be printed using flexible
10 // filament for a snug fit
12 module holder (battery_d = 20, battery_h = 3.2, case_wall = 1.7, slot_undersize = 0.4, wire_d = 1.5, cover_pct = 0.4) {
13 battery_h = battery_h - slot_undersize;
15 case_d = battery_d + case_wall*2;
16 case_h = battery_h + case_wall*2;
18 %cylinder (d= battery_d, h = battery_h, center = true);
21 cylinder (d = case_d, h = case_h, center = true);
22 cylinder (d= battery_d, h = battery_h, center = true);
24 // only cover cover_pct%
25 translate ([-case_d/2 + case_d*cover_pct, -case_d/2, -case_h/2 - 0.01]) cube ([case_d, case_d, case_h + 0.02]);
28 hook_distance = -case_d/2 + case_d*cover_pct/2; // fixme: shitty name
29 for (z = [-battery_h/2, battery_h/2]) {
30 #translate ([-case_d/2 - 0.01, 0, z]) rotate ([0, 90, 0]) cylinder (h = case_d, d = wire_d);
31 //#translate ([-case_d/2 - 0.01, 0, z]) rotate ([0, 90, 0]) cylinder (h = case_d * cover_pct/2, d = wire_d);
34 // hole to bend wire up to hold in place
35 translate ([hook_distance, 0, 0]) cylinder (h = case_h + 1, d = wire_d, center = true);
39 holder ($fs = 0.1, $fa = 1, slot_undersize = 0.4);