wall-cable-hook.scad

   1 // -*- C -*-
   2
   3 circle_inner_rad = 10 + 0.5;
   4
   5 thick = 3;
   6
   7 tab_sz = 20;
   8 width = 20;
   9
  10 screw_hole_dia = 4.5 + 0.5;
  11
  12 // calculated
  13
  14 circle_outer_rad = circle_inner_rad + thick;
  15
  16 module Plan() {
  17   difference(){
  18     circle(r=circle_outer_rad, $fn=150);
  19     circle(r=circle_inner_rad, $fn=150);
  20     mirror([1,0]) square([50,50]);
  21   }
  22   translate([-circle_outer_rad, -0.1])
  23     multmatrix([[1,0,0,0],
  24                 [-1,1,0,0],
  25                 [0,0,1,0],
  26                 [0,0,0,1]])
  27     square([thick, tab_sz + circle_outer_rad + thick]);
  28 }
  29
  30 module Hook(){
  31   difference(){
  32     linear_extrude(height=width) Plan();
  33     if (false)
  34       translate([-50, circle_outer_rad + tab_sz - width/2, width/2])
  35       rotate([0,90,0])
  36       cylinder(r= screw_hole_dia / 2, h=100, $fn=50);
  37   }
  38 }
  39
  40 Hook();