fairphone-case.scad

   1 // -*- C -*-
   2
   3 phone_height = 146.5;
   4 phone_width = 76.75;
   5
   6 phone_cnr_rad = 4.0;
   7
   8 phone_edge_thick = 9.0;
   9 phone_total_thick = 12.0;
  10 phone_backside_slope = 1.0; // larger means shallower
  11
  12 case_th_bottom = 2;
  13 case_th_lid = 2;
  14 case_th_side = 2;
  15 case_th_lip = 1.2;
  16
  17 keeper_th_z = 0.75;
  18 keeper_th_x = 0.75;
  19 keeper_width = 2.5;
  20 keeper_height = 2.5;
  21
  22 keeper_gap_z_top = 0.25;
  23 keeper_gap_z_bot = 0.25;
  24 keeper_gap_x     = 0.25;
  25
  26 case_lip = 1.25;
  27
  28 $fa = 5;
  29 $fs = 0.1;
  30
  31 // calculated
  32
  33 phone_backside_slope_thick = phone_total_thick - phone_edge_thick;
  34
  35 //lid_lip_overlap_width xxx bad name = ;
  36 //lid_lip_inner_slope = [ 5, 5 ]; // xxx
  37
  38 epp0 = [0,0];
  39 epp1 = [0, -phone_edge_thick];
  40 epp2 = epp1 + phone_backside_slope_thick * [ phone_backside_slope, -1 ];
  41 epp3 = epp2 + [10, 0];
  42 epp5 = epp0 + [0,1] * (keeper_th_z + keeper_gap_z_top + case_lip);
  43 epp4 = epp5 + [-1,0] * case_th_side;
  44
  45 module rectfromto(a,b) {
  46   ab = b - a;
  47   translate([min(a[0], b[0]), min(a[1], b[1])])
  48     square([abs(ab[0]), abs(ab[1])]);
  49 }
  50 module circleat(c,r) { translate(c) circle(r); }
  51
  52 module EdgeProfile(){
  53   difference(){
  54     hull(){
  55       circleat(epp3, r=case_th_bottom);
  56       circleat(epp2, r=case_th_bottom);
  57       circleat(epp1, r=case_th_side);
  58       rectfromto(epp0, epp4);
  59     }
  60     %polygon([ epp5 + [0,10],
  61                epp1,
  62                epp2,
  63                epp3 + [10,0] ]);
  64   }
  65 }
  66
  67 module CaseBase_rhsflip() {
  68   for (rhs=[0,1]) {
  69     translate([phone_width/2, 0, 0])
  70       mirror([rhs,0,0])
  71       translate([-phone_width/2, 0, 0])
  72       children();
  73   }
  74 }
  75
  76 module CaseBase_botflip() {
  77   for (bot=[0,1]) {
  78     translate([0, -phone_height/2, 0])
  79       mirror([0, bot, 0])
  80       translate([0, phone_height/2, 0])
  81       children();
  82   }
  83 }
  84
  85 module CaseBase(){
  86   CaseBase_rhsflip(){
  87     translate([0, -phone_cnr_rad, 0])
  88       rotate([90,0,0])
  89       linear_extrude(height = phone_height - phone_cnr_rad*2)
  90       EdgeProfile();
  91   }
  92   CaseBase_rhsflip() CaseBase_botflip() {
  93     translate([+1,-1] * phone_cnr_rad)
  94       intersection(){
  95         rotate_extrude()
  96           intersection(){
  97             mirror([1,0,0])
  98               translate([-1,0] * phone_cnr_rad)
  99               EdgeProfile();
 100             rectfromto([0,-20],[10,20]);
 101           }
 102         translate([-10, 0, -20] + 0.01 * [+1,-1, 0] )
 103           cube([10,10,40]);
 104       }
 105   }
 106   CaseBase_botflip(){
 107     translate([ phone_width - phone_cnr_rad, 0,0 ])
 108       rotate([90,0,-90])
 109       linear_extrude(height = phone_width - phone_cnr_rad*2)
 110       EdgeProfile();
 111   }
 112 }
 113
 114 EdgeProfile();
 115 //CaseBase();