Holder for the Cateye Tomo bike speedometer reed switch

diff --git a/bike-comp-sensor-holder.scad b/bike-comp-sensor-holder.scad
new file mode 100644 (file)
index 0000000..644fb6e
--- /dev/null
+++ b/bike-comp-sensor-holder.scad
@@ -0,0 +1,53 @@
+eps = 0.01;
+infty = 100;
+
+wall = 1;
+ziptie_w = 2.5 + 0.5;
+ziptie_h = 2.0 + 0.5;
+
+fork_diam = 30;
+ring_h = 2*wall + ziptie_h;
+
+base_d = 10;
+base_h = 4.5;
+hole_d = 3.5 + 0.5;
+
+// cuircular base with screw hole
+difference() {
+       hull() {
+               cylinder(r = base_d/2, h = base_h);
+               translate([-base_d/2-wall, -base_d/2, 0])
+                       cube([wall, base_d, base_h]);
+       }
+       translate([0, 0, -infty/2])
+               cylinder(r = hole_d/2, h = infty);
+       for (angle = [0:30:360]) rotate([0, 0, angle])
+               translate([0, 0, base_h])
+                       rotate([0, 90, 0])
+                       cylinder(r1 = 0, r2 = 1, h = base_d/2+eps, $fn=4);
+}
+
+// ziptie holding part
+translate([-base_d/2-fork_diam/2 - ring_h, 0, 0])
+intersection() {
+       translate([0, -base_d/2-eps, 0]) cube([infty, base_d+2*eps, 15]);
+
+       translate([0, -base_d/2, base_h])
+       rotate([-90, 0, 0])
+       difference() {
+               scale([1, 0.8, 1])
+               cylinder(r = fork_diam/2 + ring_h, h = base_d);
+               // fork itself
+               translate([0, 0, -eps])
+                       cylinder(r = fork_diam/2, h = base_d + 2*eps);
+       // two ziptie holes
+       for (z = [wall, base_d - wall - ziptie_w]) 
+       translate([0, 0, z])
+               difference() {
+                       cylinder(r = fork_diam/2 + wall + ziptie_h,
+                               h = ziptie_w);
+                       translate([0, 0, -eps])
+                               cylinder(r = fork_diam/2 + wall, h = ziptie_w+2*eps);
+               }
+                       
+}}