2个卡箍1个无头螺丝拼1个灯夹

还需要1个三脚架固定

difference(){
 union(){
  translate([18,-7,0])
  cube([14,14,1]);

  translate([-7,18,40])
  cube([14,14,1]);

  translate([-7,-32,40])
  cube([14,14,1]);

  points = [
      [7,-32,40],  //0
      [18,-7,0],   //1
      [18,7,0],    //2
      [7,-18,40],  //3
      [7,-32,41],  //4
      [18,-7,1],   //5
      [18,7,1],    //6
      [7,-18,41]]; //7
      
  faces = [
      [0,1,2,3],  // bottom
      [4,5,1,0],  // front
      [7,6,5,4],  // top
      [5,6,2,1],  // right
      [6,7,3,2],  // back
      [7,4,0,3]]; // left
      
  polyhedron(points, faces);

  points1 = [
      [7,18,40],  //0
      [18,-7,0],  //1
      [18,7,0],   //2
      [7,32,40],  //3
      [7,18,41],  //4
      [18,-7,1],  //5
      [18,7,1],   //6
      [7,32,41]]; //7

  polyhedron(points1, faces);
 }

 translate([25,0,-1])
 cylinder(3,4,4,$fn=360);

 translate([0,-25,39])
 cylinder(3,4,4,$fn=360);

 translate([0,25,39])
 cylinder(3,4,4,$fn=360);
}