chiark / gitweb /
fairphone-case: Rework HingeLeverInnerProfile, prep for change angles (nfc)
[reprap-play.git] / fairphone-case.scad
index 7e50afa507c8034b40d1a44db8fe6b9f17d1b4ef..04c4d61b93c93c6c11f5717a98d86a11bedca2a1 100644 (file)
@@ -26,7 +26,7 @@ phone_backside_slope_outer = 1.0; // larger means shallower
 camera_pos_tl = [  6.450, 12.750 ]; // measured from tl corner
 camera_pos_br = [ 22.300, 37.600 ]; // tl/br as seen from back
 
-jack_pos = [ 14.38, 7.96 ];
+jack_pos = [ 13.83, 8.485 ];
 jack_dia = 10.64 + .5; // some jack I had lying around
 
 noisecancelmic_pos = [ 19.54, 7.37 ];   // from rhs
@@ -117,10 +117,13 @@ prop_recess_slop = 0.200; // each side
 prop_end_dia = 0.5;
 prop_main_th = 3;
 prop_taper_len = 6;
-prop_main_width = 3;
+prop_main_width = 4;
 prop_side_gap = 0.75; // each side
+prop_lidrecess_behind = 0.75;
 prop_caserecess_behind = 0.75;
-prop_caserecess_taper = 0.25; // each side
+prop_caserecess_taper = 0.45; // one side only
+prop_prop_gap = 0.5;
+prop_prong_heel_slope = 0.5;
 
 // ---------- calculated ----------
 
@@ -129,6 +132,8 @@ phone_height = (phone + bumper*2)[1];
 
 inside_br = [phone_width, -phone_height];
 
+prop_prong_h = prop_main_th;
+
 //echo(camera_pos_tl + bumper,
 //     camera_pos_br + bumper);
 
@@ -184,6 +189,9 @@ bppO = [ bppN[0], bppP[1] ];
 bppL = lpp10 + [5,0];
 bppK = [ bppL[0], bppN[1] ];
 bppJ = [ bppN[0], bppL[1] ];
+bppU = [ bppJ[0], lpp12[1] ];
+bppV = lpp11;
+bppW = lpp10;
 
 // hinge plan
 hp_rn = hingescrew_nut_dia/2;
@@ -258,10 +266,24 @@ prcp2 = [ epp4[0] + prop_buildout_less,
 
 prop_caserecess_buildout_r = -1; // prcp2[0] - epp2o[0];
 
-echo(prc_r3);
+prcp1 = [ epp2o[0] + prc_r3 + prop_caserecess_behind,
+         epp2i[1] - prc_r3 - prop_recess_under];
+
+// prop recess in lid
+
+prl_r10 = prop_end_dia/2;
+prl_r10o = prl_r10 + prop_recess_slop;
+
+prlp10 = lpp10 + [1,1] * prl_r10o
+  + [1,0] * prop_lidrecess_behind
+  + [0,1] * prop_recess_under;
 
-prcp1 = [ epp2o[0],
-         epp2i[1] - prc_r3 ];
+// prop
+
+$prpp10 = [0,0];
+$prpp11 = [0, prop_taper_len];
+
+$prp_r10 = prl_r10;
 
 // ---------- modules ----------
 
@@ -302,7 +324,9 @@ module LidEdgeProfile(){
 
 module ButtonCoverProfile(){
   intersection(){
-    polygon([ bppM, bppP, bppO, bppJ, bppL, bppK ]);
+    polygon(concat([ bppM, bppP, bppO, bppJ ],
+                  (enable_support ? [ bppU, bppV, bppW ] : []),
+                  [ bppL, bppK ]));
     hull(){
       EdgeProfile();
       LidEdgeProfile();
@@ -565,12 +589,15 @@ module HingeLeverOuterProfile(){
 }
 
 module HingeLeverInnerProfile(){
-  for (c = [hppT, hppB]) {
-    hull()
+  for (s = [-1,+1]) {
+    c = s > 0 ? hppT : hppB;
+    translate(c)
+      mirror([0,0,s>0])
+      hull()
       for (x=[-20,20])
-       for (y=[0, c[1] - hppM[1]])
+       for (y=[0, s * 10])
          translate([x,y])
-           circleat(c, hp_rn);
+           circle(hp_rn);
   }
 }
 
@@ -603,6 +630,102 @@ module CaseBase(){
     EdgeProfile();
 }
 
+function prop_x(gamma) = hp_k / (2 * sin(gamma/2)) - hppT[0];
+
+module PropProfileAssignments(gamma){
+  // https://en.wikipedia.org/wiki/Solution_of_triangles#Two_sides_and_the_included_angle_given_(SAS)
+  x = prop_x(gamma);
+  p = phone_height + prlp10[0] - hppB[0];
+  b = p + x;
+
+  q = phone_height - hppT[0] - prcp1[0]; // $prpp7[0] is 0 by definition
+  a = q + x;
+  c = sqrt(a*a + b*b - 2*a*b*cos(gamma));
+  $prp_alpha = acos( (b*b + c*c - a*a) / (2*b*c) );
+
+  $prp_theta = 90 - $prp_alpha;
+  beta = 180 - $prp_alpha - gamma;
+  psi = 90 - beta;
+
+  //echo("abc", a,b,c);
+
+  v1 = [ [ cos(psi), -sin(psi) ],    // x
+        [ sin(psi),  cos(psi) ] ];  // y
+
+  $prpp7 = [0, c + (lpp13[1] - $prpp10[1] - hp_k) ];
+
+  $prp_r1 = prc_r1;
+  $prp_r11 = prop_main_th/2;
+
+  $prpp1 = $prpp7 + [1,0] *
+    // this is approximate, but will do
+    (prop_main_th/2 + prop_prop_gap + prcp1[0] - cppA[0]);
+  $prpp3 = $prpp1 +
+    v1[0] * -$prp_r1 +
+    v1[1] * ((prcp2[1] - prcp1[1]) - prop_prop_gap);
+  $prpp12 = $prpp3 + v1[0] *
+    (prop_end_dia + prop_caserecess_taper * ($prpp1[1] - $prpp3[1]));
+  $prp_r8 = prop_main_th;
+  $prpp4 = [ prop_main_th/2, $prpp3[1] ];
+  $prp_r5 = $prp_r8;
+  $prpp5 = [ $prpp12[0] - $prp_r5,
+           $prpp3[1] - prop_prong_h + $prp_r5 ];
+  $prpp6 = $prpp4 + [0,-1] * (prop_prong_h +
+         prop_prong_heel_slope * ($prpp5[0] - $prpp4[0]));
+  $prpp8 = $prpp4 + [0,-1] * $prp_r8;
+  $prpp9 = $prpp8 + [-1,0] * $prp_r8;
+
+  children();
+}
+
+module PropProfile(gamma, cut=0, rot=0){ ////toplevel
+  PropProfileAssignments(gamma){
+
+    //#circleat($prpp3,1);
+    //#circleat($prpp12,1);
+
+    if (!cut) {
+      hull(){
+       translate($prpp8)
+         intersection(){
+           circle($prp_r8);
+           polygon([[-20,-0], [20,20], [0,0]]);
+         }
+       rectfromto($prpp6, $prpp9);
+       translate($prpp5) intersection(){
+         circle($prp_r5);
+         polygon([[-10,-10], [0,0], [10,0]]);
+       }
+       rectfromto($prpp12 + [0,-0.1], $prpp3);
+      }
+      hull(){
+       circleat($prpp1, $prp_r1);
+       rectfromto($prpp12 + [0,-0.1], $prpp3);
+      }
+    }
+    // main shaft
+    rotate([0,0, rot*-$prp_theta]){
+      hull(){
+       extra = cut ? prop_recess_slop : 0;
+       rectfromto($prpp6, $prpp9);
+       circleat($prpp11, $prp_r11 + extra);
+       circleat($prpp10, $prp_r10 + extra);
+      }
+    }
+  }
+}
+
+module PropAggregateProfile(){
+  for (angle = prop_angles)
+    PropProfile(angle, 0,0);
+}
+
+module Prop(){ ////toplevel
+  hw = prop_main_width/2;
+  linextr(-hw, +hw)
+    PropAggregateProfile();
+}
+
 module Case(){ ////toplevel
   difference(){
     union(){
@@ -706,9 +829,9 @@ module Case(){ ////toplevel
     // prop recess
     Flip_rhs(1)
       translate([prop_x_pos,0,0])
+      mirror([0,1,0])
       rotate([90,0,90])
       linextr(-prop_recess_hw, +prop_recess_hw)
-      mirror([1,0])
       hull(){
         for (d=[ [0,0], [0,-1], [+1,-1/prop_caserecess_taper] ])
          circleat(prcp1 + 20*d,
@@ -748,6 +871,15 @@ module Lid(){ ////toplevel
 
     // screw holes in the hinge arms
     HingeScrews();
+
+    // prop recess
+    translate([prop_x_pos, -prlp10[0], prlp10[1]])
+      mirror([0,1,0])
+      rotate([90,0,90])
+      linextr(-prop_recess_hw, +prop_recess_hw)
+      hull()
+      for (pa = prop_angles)
+       PropProfile(pa, 1,1);
   }
 }
 
@@ -876,19 +1008,6 @@ module LidPrint(){ ////toplevel
     Lid();
 }
 
-module TestSelectPropRecesses(posns){
-  linextr(-100,100){
-    translate([phone_width/2, -phone_height]){
-      square([ 3, 500 ], center=true);
-      for (y=posns)
-       hull()
-         for (dy=[ -prp5[0], -prp2[0] ])
-           translate([0,y+dy])
-             square([prop_main_width+5, 5], center=true);
-    }
-  }
-}
-
 module TestSelectFrame(){
   include = [1,-1] * (epp2i[0] + 4);
 
@@ -902,7 +1021,6 @@ module TestSelectFrame(){
 
 module TestSelectLidFrame(){
   TestSelectFrame();
-  TestSelectPropRecesses(prop_lid_posns);
 }
 
 module TestFrameCase(){ ////toplevel
@@ -916,6 +1034,15 @@ module TestFrameCase(){ ////toplevel
   }
 }
 
+module TestTopApertures(){ ////toplevel
+  intersection(){
+    Case();
+    TestSelectFrame();
+    translate([-100, -35, -100])
+      cube([400, 100, 200]);
+  }
+}
+
 module TestFrameLidPrint(){ ////toplevel
   rotate([0,180,0]) intersection(){
     Lid();
@@ -945,6 +1072,48 @@ module HingeScrews(){
   }
 }
 
+module DemoPropAngleSelect(c){
+  color(c) difference(){
+    union(){ children(); }
+    translate([ prop_x_pos, -400, -200 ])
+      cube([ 400,800,400 ]);
+  }
+}
+
+module DemoPropAngle(ang){
+  hL = [0, -(phone_height - hppT[0]), hppT[1] - hp_k*2];
+  hC = [0, -(phone_height - hppB[0]), hppB[1]];
+
+  translate(hL)
+    rotate([ang/2,0,0])
+    translate(-hL)
+    translate(hC)
+    rotate([ang/2,0,0])
+    translate(-hC) {
+      DemoPropAngleSelect("red") Case();
+
+      color("orange")
+       translate([prop_x_pos, -prcp1[0], prcp1[1]])
+       PropProfileAssignments(ang) {
+          echo($prpp1);
+         rotate([-$prp_theta, 0, 0])
+         translate([0, $prpp1[0], -$prpp1[1]])
+         rotate([90,0,-90])
+         Prop();
+        }
+    }
+
+  translate([0,0, -hp_k*2])
+    DemoPropAngleSelect("blue")
+    Lid();
+}
+
+module DemoPropAngles(){ ////toplevel
+  for (i=[0 : len(prop_angles)-1])
+    translate(i * [0, -100, 100])
+    DemoPropAngle(prop_angles[i]);
+}
+
 module DemoFrame(){ ////toplevel
   color("red") TestFrameCase();
   color("blue") intersection(){ Lid(); TestSelectLidFrame(); }
@@ -1010,6 +1179,19 @@ module DemoProfiles(){ ////toplevel
     color("blue") CatchCatchProfile();
     color("red") difference(){ EdgeProfile(); CatchCutProfile(); }
   }
+
+  translate([40,-30]) {
+    difference(){
+      LidEdgeProfile();
+      translate(prlp10)
+       PropProfile(10, 1, 0);
+    }
+    translate(prlp10)
+      PropProfile(15, 0);
+  }
+  translate([60,-30]) {
+    PropAggregateProfile();
+  }
 }
 
 //EdgeProfile();