num-enter.scad

   1 //measures are in millimeters
   2 //(feel free to cocnvert them to attoparsecs)
   3 AY=18.0;
   4 AX=41.0;
   5 BY=13.0;
   6 BLX=33;
   7 EZ=11.0;
   8 FLZ=15.0;
   9 H=12.75;
  10 SLOPE_X=AX/2;
  11 SLOPE_Z=2.0;
  12 CYL_OFF_Z=40;
  13 CYL_DEPTH=1;
  14 CLIP_X=2;
  15 CLIP_Y=0.75;
  16 CLIP_H=3*CLIP_Y;
  17 CORNER_RADIUS=2;
  18 INNER_GUARD_RADIUS=6.5;
  19 OUTER_GUARD_RADIUS=7.5;
  20 BLIND_SHAFT_OUTER_DIAMETER=4.0;
  21 BLIND_SHAFT_INNER_DIAMETER=2.0;
  22 SHAFT_X=8.0;
  23 SHAFT_Y=6.0;
  24 SHAFT_LENGTH=9.0;
  25 SHAFT_THICKNESS=1.0;
  26 SHAFT_CLIP_WIDTH=3.0;
  27 SHAFT_CLIP_THICKNESS=0.75;
  28 SHAFT_CLIP_HEIGHT=2.0;
  29 SHAFT_CLIP_SLOPE_DEPTH=1.0;
  30 SHAFT_CLIP_ANGLE=45;
  31 SHAFT_END_CUTOUT_HEIGHT=1.5;
  32 SHAFT_LARGE_SLOT_TO_BASE=1.5;
  33 SHAFT_SMALL_SLOT_LENGTH=7.25;
  34 SHAFT_SMALL_SLOT_WIDTH=2.5;
  35 SHAFT_SPRING_HOLDER_WIDTH=3.0;
  36 SHAFT_SPRING_HOLDER_TO_BASE=4.0;
  37 SHAFT_SPRING_GUIDE_WIDTH=1.0;
  38 SHAFT_SPRING_GUIDE_SIDES_HEIGHT=3.5;
  39 STRUT_THICKNESS=1;
  40 STRUT_HEIGHT=3;
  41 STRUT_SPACING=1;
  42 SHAFT_SPRING_HOLDER_NIPPLE_HEIGHT=1;
  43 SHAFT_SPRING_HOLDER_NIPPLE_RADIUS=0.75;
  44 SHAFT_OFF_Y=AY/2;
  45 SHAFT_OFF_X=1.65+INNER_GUARD_RADIUS;
  46 BLIND_SHAFT_OFF_Y=AY/2;
  47 BLIND_SHAFT_OFF_X=1.65+19+OUTER_GUARD_RADIUS;
  48 SHAFT_SMALL_SLOT_BEVEL=0.5;
  49
  50 WallThickness=0.75;
  51 ClipWidth=2.2;
  52 ClipDepth=0.75;
  53
  54 //ascfront=FLZ/sqrt(pow(FLZ,2)-pow(H,2));
  55 //asctop=(H-EZ)/sqrt(pow(BLX,2)-pow((H-EZ),2));
  56
  57 alpha=asin((H-EZ)/BLX);
  58 beta=asin(H/FLZ);
  59 gamma=90-asin((0.5*(AY-BY))/EZ);
  60
  61 module keycap(){
  62         scale([AX/(AX+2*CORNER_RADIUS),AY/(AY+2*CORNER_RADIUS),1])
  63         translate([CORNER_RADIUS,CORNER_RADIUS,0.01])
  64         minkowski(){
  65                 difference(){
  66                         cube([AX,AY,H]);
  67                         rotate(a=gamma,v=[1,0,0]) cube([100,100,100]);
  68                         translate([0,AY,0]) rotate(a=90-gamma,v=[1,0,0]) cube([100,100,100]);
  69                         translate([0,0,EZ]) rotate(a=-alpha,v=[0,1,0]) translate([-50,0,0]) cube([100,100,100]);
  70                         translate([0,AY/2,EZ+CYL_OFF_Z]) rotate(a=90-alpha,v=[0,1,0]) cylinder(h=100,center=true,r=CYL_OFF_Z+CYL_DEPTH,$fa=1);
  71                         translate([AX,0,0]) rotate(a=beta-90,v=[0,1,0]) cube([100,100,100]);
  72                 }
  73                 cylinder(h=0.01,r=CORNER_RADIUS,$fs=0.6);
  74                 //rotate(a=90,v=[1,0,0]) cylinder(h=0.01,r=1,$fs=0.3);
  75         }
  76 }
  77
  78 module blind_shaft(){
  79         translate([0,0,-SHAFT_LENGTH]) difference(){
  80                 cylinder(r=BLIND_SHAFT_OUTER_DIAMETER/2,h=100,$fs=0.3);
  81                 cylinder(r=BLIND_SHAFT_INNER_DIAMETER/2,h=100,$fs=0.3);
  82         }
  83 }
  84
  85 module shaft(){
  86         spring_guide_length = SHAFT_X-SHAFT_THICKNESS-SHAFT_SPRING_HOLDER_WIDTH;
  87         spring_guide_height = SHAFT_SPRING_HOLDER_TO_BASE-SHAFT_LARGE_SLOT_TO_BASE;
  88         translate([0,0,-SHAFT_LENGTH]) difference(){
  89                 union(){
  90                         difference(){
  91                                 union(){
  92                                         difference(){
  93                                                 intersection(){
  94                                                         cylinder(h=100,r=SHAFT_X/2,$fs=0.3);
  95                                                         translate([-SHAFT_X/2,-SHAFT_Y/2,0]) cube([SHAFT_X,SHAFT_Y,100]);
  96                                                 }
  97                                                 intersection(){
  98                                                         cylinder(h=100,r=SHAFT_X/2-SHAFT_THICKNESS,$fs=0.3);
  99                                                         translate([-SHAFT_X/2+SHAFT_THICKNESS,-SHAFT_Y/2+SHAFT_THICKNESS,0]) cube([SHAFT_X-2*SHAFT_THICKNESS,SHAFT_Y-2*SHAFT_THICKNESS,100]);
 100                                                 }
 101                                         }
 102                                         translate([-SHAFT_CLIP_WIDTH/2, -SHAFT_CLIP_THICKNESS-SHAFT_Y/2,0]) cube([SHAFT_CLIP_WIDTH/2, SHAFT_CLIP_THICKNESS,SHAFT_CLIP_HEIGHT]);
 103                                         translate([-SHAFT_CLIP_WIDTH/2, SHAFT_Y/2,0]) cube([SHAFT_CLIP_WIDTH/2, SHAFT_CLIP_THICKNESS,SHAFT_CLIP_HEIGHT]);
 104                                 }
 105                                 translate([-SHAFT_CLIP_WIDTH/2, -SHAFT_CLIP_THICKNESS-SHAFT_Y/2+SHAFT_CLIP_SLOPE_DEPTH,0]) rotate(a=90+SHAFT_CLIP_ANGLE,v=[1,0,0]) cube([SHAFT_CLIP_WIDTH/2,100,100]);
 106                                 translate([-SHAFT_CLIP_WIDTH/2, SHAFT_Y/2+SHAFT_CLIP_THICKNESS-SHAFT_CLIP_SLOPE_DEPTH,0]) mirror([0,1,0]) rotate(a=90+SHAFT_CLIP_ANGLE,v=[1,0,0]) cube([SHAFT_CLIP_WIDTH/2,100,100]);
 107                                 translate([0,-50,0]) cube([100,100,SHAFT_END_CUTOUT_HEIGHT]);
 108                                 translate([0,-SHAFT_Y/2+SHAFT_THICKNESS,0]) cube([100,SHAFT_Y-SHAFT_THICKNESS*2,SHAFT_LENGTH+SHAFT_LARGE_SLOT_TO_BASE]);
 109                                 //small slot cutout
 110                                 translate([0,-SHAFT_SMALL_SLOT_WIDTH/2,0]){
 111                                         mirror([1,0,0]) cube([100,SHAFT_SMALL_SLOT_WIDTH,SHAFT_SMALL_SLOT_LENGTH-0.5*SHAFT_SMALL_SLOT_WIDTH]);
 112                                 }
 113                                 //small slot cutout
 114                                 translate([0,0,SHAFT_SMALL_SLOT_LENGTH-0.5*SHAFT_SMALL_SLOT_WIDTH]) rotate(a=-90,v=[0,1,0]) cylinder(r=SHAFT_SMALL_SLOT_WIDTH/2,h=SHAFT_X/2,$fs=0.3);
 115                         }
 116                         //spring holder
 117                         translate([-SHAFT_X/2+SHAFT_SPRING_HOLDER_WIDTH/2+SHAFT_THICKNESS,0,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE]) cylinder(r=SHAFT_SPRING_HOLDER_WIDTH/2,h=100,$fs=0.3);
 118                         intersection(){
 119                                 translate([-SHAFT_X/2+SHAFT_SPRING_HOLDER_WIDTH/2+SHAFT_THICKNESS,0,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE-SHAFT_SPRING_HOLDER_NIPPLE_HEIGHT]) cylinder(r=SHAFT_SPRING_HOLDER_NIPPLE_RADIUS,h=100,$fs=0.3);
 120                                 translate([0,0,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE-SHAFT_SPRING_HOLDER_NIPPLE_HEIGHT*1.5]) rotate(v=[0,1,0], a=atan(SHAFT_SPRING_HOLDER_NIPPLE_HEIGHT/(SHAFT_SPRING_HOLDER_NIPPLE_RADIUS*2))) translate([-50,-50,0]) cube(100,100,100);
 121                         }
 122                         intersection(){
 123                                 difference(){
 124                                         translate([SHAFT_X/2-SHAFT_THICKNESS,-0.5*SHAFT_SPRING_GUIDE_WIDTH,SHAFT_LENGTH+SHAFT_LARGE_SLOT_TO_BASE]) mirror([1,0,0]) cube([100,SHAFT_SPRING_GUIDE_WIDTH,100]);
 125                                         translate([-SHAFT_X/2+SHAFT_SPRING_HOLDER_WIDTH+SHAFT_THICKNESS,-0.5*SHAFT_SPRING_GUIDE_WIDTH,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE])
 126                                         mirror([1,0,0]) rotate(a=90-asin(spring_guide_height/spring_guide_length),v=[0,1,0]) mirror([0,0,1]) translate([0,0,-50]) cube([100,SHAFT_SPRING_GUIDE_WIDTH,100]);
 127                                 }
 128                                 cube([SHAFT_X-SHAFT_THICKNESS,SHAFT_Y,100],center=true);
 129                         }
 130                         //side spring guides
 131                         difference(){
 132                                 translate([-SHAFT_X/2+SHAFT_THICKNESS+(SHAFT_SPRING_HOLDER_WIDTH-SHAFT_SPRING_GUIDE_WIDTH)/2,-SHAFT_Y/2+SHAFT_THICKNESS,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE-SHAFT_SPRING_GUIDE_SIDES_HEIGHT]) cube([SHAFT_SPRING_GUIDE_WIDTH,SHAFT_Y-2*SHAFT_THICKNESS,EZ-SHAFT_SPRING_HOLDER_TO_BASE+SHAFT_SPRING_GUIDE_SIDES_HEIGHT]);
 133                                 translate([-SHAFT_X/2+SHAFT_THICKNESS+(SHAFT_SPRING_HOLDER_WIDTH-SHAFT_SPRING_GUIDE_WIDTH)/2,-SHAFT_SPRING_HOLDER_WIDTH/2,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE]) rotate(a=-asin(((SHAFT_Y-SHAFT_SPRING_HOLDER_WIDTH)/2-SHAFT_THICKNESS)/SHAFT_SPRING_GUIDE_SIDES_HEIGHT),v=[1,0,0]) translate([0,0,-50]) cube([SHAFT_SPRING_GUIDE_WIDTH,100,100]);
 134                         }
 135                         difference(){
 136                                 translate([-SHAFT_X/2+SHAFT_THICKNESS+(SHAFT_SPRING_HOLDER_WIDTH-SHAFT_SPRING_GUIDE_WIDTH)/2,-SHAFT_Y/2+SHAFT_THICKNESS,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE-SHAFT_SPRING_GUIDE_SIDES_HEIGHT]) cube([SHAFT_SPRING_GUIDE_WIDTH,SHAFT_Y-2*SHAFT_THICKNESS,EZ-SHAFT_SPRING_HOLDER_TO_BASE+SHAFT_SPRING_GUIDE_SIDES_HEIGHT]);
 137                                 mirror([0,1,0]) translate([-SHAFT_X/2+SHAFT_THICKNESS+(SHAFT_SPRING_HOLDER_WIDTH-SHAFT_SPRING_GUIDE_WIDTH)/2,-SHAFT_SPRING_HOLDER_WIDTH/2,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE]) rotate(a=-asin(((SHAFT_Y-SHAFT_SPRING_HOLDER_WIDTH)/2-SHAFT_THICKNESS)/SHAFT_SPRING_GUIDE_SIDES_HEIGHT),v=[1,0,0]) translate([0,0,-50]) cube([SHAFT_SPRING_GUIDE_WIDTH,100,100]);
 138                         }
 139                 }
 140                 translate([-SHAFT_X/2+SHAFT_SPRING_HOLDER_WIDTH+SHAFT_THICKNESS,-SHAFT_Y/2+SHAFT_THICKNESS,SHAFT_LENGTH+SHAFT_SPRING_HOLDER_TO_BASE]) mirror([1,0,0]) rotate(a=90-asin(spring_guide_height/spring_guide_length),v=[0,1,0]) mirror([0,0,1]) cube([SHAFT_THICKNESS,SHAFT_Y-2*SHAFT_THICKNESS,100]);
 141         }
 142 }
 143
 144 module guard(){
 145         difference(){
 146                 union(){
 147                         cube([STRUT_THICKNESS,100,100],center=true);
 148                         cylinder(r=OUTER_GUARD_RADIUS,h=100);
 149                 }
 150                 difference(){
 151                         cylinder(r=INNER_GUARD_RADIUS,h=100);
 152                         translate([-STRUT_SPACING/2-STRUT_THICKNESS,-50,EZ-STRUT_HEIGHT]) cube([STRUT_THICKNESS,100,STRUT_HEIGHT]);
 153                         translate([STRUT_SPACING/2,-50,EZ-STRUT_HEIGHT]) cube([STRUT_THICKNESS,100,STRUT_HEIGHT]);
 154                         translate([-50,-STRUT_SPACING/2-STRUT_THICKNESS,EZ-STRUT_HEIGHT]) cube([100,STRUT_THICKNESS,STRUT_HEIGHT]);
 155                         translate([-50,STRUT_SPACING/2,EZ-STRUT_HEIGHT]) cube([100,STRUT_THICKNESS,STRUT_HEIGHT]);
 156                 }
 157         }
 158 }
 159
 160 difference(){
 161         keycap();
 162         difference(){
 163                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
 164                 translate([SHAFT_OFF_X,SHAFT_OFF_Y]) guard();
 165                 translate([BLIND_SHAFT_OFF_X,BLIND_SHAFT_OFF_Y]) guard();
 166                 difference(){
 167                          translate([0,SHAFT_OFF_Y]) cube([100,STRUT_THICKNESS,100],center=true);
 168                          translate([SHAFT_OFF_X,SHAFT_OFF_Y]) cube([2*OUTER_GUARD_RADIUS-WallThickness,100,100],center=true);
 169                          translate([BLIND_SHAFT_OFF_X,BLIND_SHAFT_OFF_Y]) cube([2*OUTER_GUARD_RADIUS-WallThickness,100,100],center=true);
 170                 }
 171         }
 172         translate([AX-SLOPE_X,0]) rotate(a=[0,-atan(SLOPE_Z/SLOPE_X),0]) translate([-50,-50,-99.9]) cube([100,100,100]);
 173 }
 174 intersection(){
 175         union(){
 176                 translate([WallThickness, WallThickness, 0]) scale(v=[1-2*WallThickness/AX, 1-2*WallThickness/AY, 1-WallThickness/H]) keycap();
 177                 translate([-50,-50,-99.9]) cube([100,100,100]);
 178         }
 179         union(){
 180                 translate([SHAFT_OFF_X,SHAFT_OFF_Y]) shaft();
 181                 translate([BLIND_SHAFT_OFF_X,BLIND_SHAFT_OFF_Y]) blind_shaft();
 182         }
 183 }