flyscreen-handle.scad

   1 // -*- C -*-
   2
   3 opening_height = 7.84 - 0.3;
   4 opening_depth = 6.0; // 7.88;
   5 openingcnr_dia = 2.75;
   6 opening_topprotr = 1.54;
   7
   8 gap = 0.25;
   9
  10 retain_empir_angle = 20;
  11 retain_empir_stalkw = 0.8;
  12 retain_rad = 1.65;
  13 retain_empir_inward = 0.65;
  14
  15 hgap_empir_adjust = -0.5;
  16
  17 topprotr_rad = 0.35;
  18
  19 bot_overlap = 5;
  20 bot_w = 3;
  21
  22 handle_w = 8;
  23 handle_rh = 3;
  24 handle_rcut = 3;
  25
  26 cutout_gap = 1.5;
  27
  28 total_len = 35;
  29 retaining_len = 10;
  30 overret_gaplen = 5;
  31
  32 overret_hch = 5;
  33
  34 // calculated
  35
  36 ins_irad = openingcnr_dia/2 + gap;
  37 ins_orad = openingcnr_dia/2 + opening_height - gap;
  38 ins_th = ins_orad - ins_irad;
  39
  40 handle_x0 = ins_irad + hgap_empir_adjust;
  41 handle_h = bot_overlap + ins_th;
  42 handle_y0 = -ins_orad-bot_overlap;
  43 handle_y1 = handle_y0 + handle_h;
  44
  45 handle_x1 = handle_x0 + bot_w + handle_w;
  46
  47 topprotr_y = -ins_irad + opening_topprotr;
  48
  49 module InsertSection(){
  50   hull(){
  51     translate([-ins_irad, -ins_irad])
  52       mirror([1,0])
  53       square([opening_depth - ins_irad, 0.1]);
  54     translate([-ins_irad - topprotr_rad,
  55                topprotr_y - topprotr_rad])
  56       circle(r=topprotr_rad, $fn=10);
  57   }
  58   translate([0, -ins_orad]) square([ins_irad+1, ins_th]);
  59   intersection(){
  60     translate([0.1, -ins_irad + 0.1])
  61       mirror([1,1])
  62       square([100, opening_depth]);
  63     difference(){
  64       circle(r= ins_orad);
  65       circle(r= ins_irad, $fn=20);
  66     }
  67   }
  68 }
  69
  70 module HandleSection(){
  71   difference(){
  72     hull(){
  73       translate([handle_x0, handle_y0])
  74         square([bot_w, handle_h]);
  75       for (y= [handle_y1 - handle_rh/2,
  76                handle_y1 - ins_th + handle_rh/2]) {
  77         translate([handle_x1 - handle_rh/2, y])
  78           circle(r= handle_rh/2, $fn=20);
  79       }
  80     }
  81     hull(){
  82       for (x= [handle_x0 + bot_w + handle_rcut/2,
  83                handle_x1 - handle_rh/2 - handle_rcut/2]) {
  84         translate([x, handle_y1])
  85           circle(r = handle_rcut/2, $fn=20);
  86       }
  87     }
  88   }
  89   hull(){
  90     for (y= [handle_y1 -   handle_rh/2,
  91              handle_y1 - 3*handle_rh/2])
  92       translate([handle_x1 - handle_rh/2, y])
  93         circle(r = handle_rh/2, $fn=20);
  94   }
  95 }
  96
  97 module RetainSection(){
  98   rotate(180-retain_empir_angle)
  99     translate([0, ins_orad - retain_empir_inward])
 100     circle(r=retain_rad, $fn=20);
 101 }
 102
 103 module RetainCutout(gapping=false){
 104   rotate(180-retain_empir_angle)
 105     translate([0, ins_orad - retain_empir_inward]) {
 106     difference(){
 107       circle(r=retain_rad + cutout_gap, $fn=20);
 108       if (!gapping)
 109         rotate(180 + retain_empir_angle/2)
 110           translate([0, -retain_empir_stalkw])
 111           square([100, retain_empir_stalkw*2]);
 112     }
 113   }
 114 }
 115
 116 module GappingSection(){
 117   difference(){
 118     InsertSection();
 119     RetainCutout(true);
 120   }
 121   HandleSection();
 122 }
 123
 124 module WithRetainSection(){
 125   difference(){
 126     InsertSection();
 127     RetainCutout();
 128   }
 129   HandleSection();
 130   RetainSection();
 131 }
 132
 133 module BasicSection(){
 134   InsertSection();
 135   HandleSection();
 136 }
 137
 138 module Handle(){
 139   bs0 = retaining_len + overret_gaplen;
 140   bs1 = bs0 + overret_hch;
 141   linear_extrude(height=total_len, convexity=100) GappingSection();
 142   linear_extrude(height=retaining_len, convexity=100) WithRetainSection();
 143   translate([0,0, bs1]) linear_extrude(height= total_len - bs1)
 144     BasicSection();
 145   translate([0,0, bs1+0.1]) mirror([0,0,1]) {
 146     intersection_for (sl=[0,1]) {
 147       multmatrix([[1,0,0,0],
 148                   [0,1,sl*0.65,0],
 149                   [0,0,1,0],
 150                   [0,0,0,1]])
 151         linear_extrude(height= overret_gaplen+1, convexity=100)
 152         BasicSection();
 153     }
 154   }
 155 }
 156
 157 module Demo(){
 158   difference(){
 159     InsertSection();
 160     RetainCutout();
 161   }
 162   HandleSection();
 163   color("red") RetainSection();
 164 }
 165
 166 module Test(){
 167   linear_extrude(height=2) {
 168     WithRetainSection();
 169     translate([0, -handle_y0 + topprotr_y + 10])
 170       BasicSection();
 171   }
 172 }
 173
 174 //Demo();
 175 //WithRetainSection();
 176 //BasicSection();
 177 //GappingSection();
 178 Test();
 179 //Handle();