18 strapwidth = 5 + 0.35;
22 hstrengdepth = strapwidth;
25 rcutoutside = 7+2 - 0.5;
26 lcutoutside = 7-6.5 - 0.5;
30 t2strenglen = tongue2depth + 5;
33 strapholethicker = 1.5;
37 tongue2x = tongue2width - holedist;
39 module Tongue(tw,tt,ad,slots=2){
41 yn=ad-ridgewidth-strapwidth;
44 translate([-tw, 0, 0])
45 cube([tw, ad, tt+strapthick]);
49 translate([-tw-1, y0 + (yn-y0)*yi/(slots-1), tt])
50 cube([tw+2, strapwidth, strapthick+strapholethicker]);
55 translate([-holedist-tabsider, 0, 0]) {
56 cube([tabsidel+tabsider+holedist, thick, tabunder+tabover]);
57 cube([tabsidel+tabsider+holedist, thick+hstrengdepth, hstrengthick]);
59 Tongue(tonguewidth,tonguethick,totaldepth,3);
60 translate([tongue2x,0,0])
61 Tongue(tongue2width,tongue2thick,tongue2depth+thick,5) {
62 mirror([1,0,0]) hull(){
63 translate([-(tongue2width-t2strengwidth)*0.05, 0,0])
64 cube([t2strengwidth,t2strenglen,
65 tongue2thick+strapthick+strapholethicker+t2strengthicker]);
66 cube([t2strengwidtht,thick+0.1,tabunder+tabover]);
74 translate([0,-25,tabunder+cutoutover]) {
75 translate([-(holedist+rcutoutside), 0,0])
78 translate([lcutoutside, 0,0])
82 translate([x, 0, tabunder]) {
83 translate([0, -1, 0]) {
85 cylinder(r= holedia/2+0.5, h=thick+2, $fn=20);
88 translate([0, 19.95 + thick, 0])
89 cube(center=true,[10,40,10]);