X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=fairphone-case.scad;h=5013bc16b9419ecab103d21408677346ac31ef85;hp=a41afd968357d788ec92887f6bb6375f2834ad50;hb=e5341097e8405194583402d52f868d386dd7d1ea;hpb=6dd18ab9f7dfdb3a0e45426c227d186279a8876f diff --git a/fairphone-case.scad b/fairphone-case.scad index a41afd9..5013bc1 100644 --- a/fairphone-case.scad +++ b/fairphone-case.scad @@ -4,6 +4,8 @@ include phone = [ 75.0, 145.0 ]; +prop_buildout_less = 3; + prop_angles = [ 15, 30, 45, 60 ]; bumper = [ 0.250, -0.025 ]; @@ -117,9 +119,11 @@ prop_main_th = 3; prop_taper_len = 6; prop_main_width = 3; 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_x_pos = 30; +prop_caserecess_taper = 0.45; // one side only +prop_prop_gap = 0.5; +prop_prong_heel_slope = 0.5; // ---------- calculated ---------- @@ -128,6 +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); @@ -137,11 +143,11 @@ lid_buttoncover_overlap = case_th_lip + keeper_gap_z_top; phone_backside_slope_thick = phone_total_thick - phone_edge_thick; -prop_lidrecess_depth = case_th_lid - prop_recess_under; +//prop_lidrecess_depth = case_th_lid - prop_recess_under; -prop_nose_len = case_th_lid - prop_recess_under; -prop_recess_slope = tan(prop_max_angle); // bigger means steeper -prop_recess_width = prop_main_th / cos(prop_max_angle) + prop_backfwd_gap; +//prop_nose_len = case_th_lid - prop_recess_under; +//prop_recess_slope = tan(prop_max_angle); // bigger means steeper +//prop_recess_width = prop_main_th / cos(prop_max_angle) + prop_backfwd_gap; //lid_lip_overlap_width xxx bad name = ; @@ -243,27 +249,38 @@ cppQ = [ cppR[0], cppV[1] - (catch_finger_height - cp_rQ) ]; cppF = [ cppV[0] + catch_finger_depth, cppC[1] ]; -// prop recess in lid +// prop recess in case + +prop_x_pos = phone_width/2; -prl_r1 = prop_end_dia/2 + prop_recess_slop; // radius of end +prop_recess_hw = 0.5 * prop_main_width + prop_side_gap; -prlp1 = [ lpp10[0] + prop_recess_slop + prop_end_dia/2, - lpp10[1] + prop_recess_slop + prop_end_dia/2 ]; +prc_r1 = prop_end_dia/2; +prc_r3 = prc_r1 + prop_recess_slop; -// prop recess in case +prcp2 = [ epp4[0] + prop_buildout_less, + case_bottom_z ]; -prcp2 = [ epp1[0], case_bottom_z ]; // protrusion corner +prop_caserecess_buildout_r = -1; // prcp2[0] - epp2o[0]; -prc_r2 = prop_end_dia/2 + prop_recess_slop; // radius of end +prcp1 = [ epp2o[0], + epp2i[1] - prc_r3 ]; -prcp1_y = epp2o[1] - prop_recess_under - prc_r2; -prcp2_x = prcp2[0] + prop_caserecess_behind + prc_r2 + - (prcp1_y - case_bottom_z) * prop_caserecess_taper; -prcp2 = [ prcp1_x, prcp1_y ]; // centre of tip circle +// prop recess in lid -prop_recess_hw = 0.5 * prop_main_width + prop_side_gap; +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; -prop_caserecess_buildout_r = prcp2[0] - epp2o[0]; +// prop + +prpp10 = [0,0]; +prpp11 = [0, prop_taper_len]; + +prp_r10 = prl_r10; // ---------- modules ---------- @@ -605,6 +622,83 @@ module CaseBase(){ EdgeProfile(); } +module PropProfile(gamma, cut=0){ ////toplevel + // https://en.wikipedia.org/wiki/Solution_of_triangles#Two_sides_and_the_included_angle_given_(SAS) + k = hp_k; + p = phone_height - prlp10[0] - hppB[0]; + x = k / (2 * sin(gamma/2)) - hppT[0]; + b = p + x; + + q = phone_height - hppT[0]; // prpp7[0] is 0 by definition + a = q + x; + c = sqrt(a*a + b*b - 2*a*b*cos(gamma)); + alpha = acos( (b*b + c*c - a*a) / (2*b*c) ); + + theta = 90 - alpha; + beta = 180 - 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]) ]; + + 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] - epp4[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; + + //#circleat(prpp3,1); + //#circleat(prpp12,1); + + if (!cut) { + hull(){ + translate(prpp8) + intersection(){ + circle(prp_r8); + polygon([[-20,-0], [0,0], [20,20]]); + } + 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, cut ? -theta : 0]){ + hull(){ + extra = cut ? prop_recess_slop : 0; + rectfromto(prpp6, prpp9); + circleat(prpp11, prp_r11 + extra); + circleat(prpp10, prp_r10 + extra); + } + } +} + module Case(){ ////toplevel difference(){ union(){ @@ -626,6 +720,16 @@ module Case(){ ////toplevel // hinge HingePortion(hex20, hex21) HingeBaseProfile(); + + // buildout for prop recess + if (prop_caserecess_buildout_r > 0) Flip_rhs(1) + linextr(case_bottom_z, epp2i[1]) + hull() { + for (dxs = [-1,+1]) + circleat([ prop_x_pos + dxs * prop_caserecess_buildout_r, + -epp2o[0] ], + r = epp2o[0] - prcp2[0]); + } } // slot for keeper @@ -669,14 +773,6 @@ module Case(){ ////toplevel ButtonPlan($button_l, 1,1); } - // buildout for prop recess - Flip_rhs(1) - linextr(-case_th_bottom, epp2i) - hull() { - for (dxs = [-1,+1]) - circleat([ prop_x_pos + dxs * prop_caserecess_buildout_r, - epp2o[0] ]); - } } // apertures along top edge @@ -705,14 +801,14 @@ module Case(){ ////toplevel // prop recess Flip_rhs(1) - translate([0,0,x]) + translate([prop_x_pos,0,0]) rotate([90,0,90]) linextr(-prop_recess_hw, +prop_recess_hw) + mirror([1,0]) hull(){ - for (zs=[ -1,0,+1 ]) - circleat(prcp2 + 20*(abs(zs) * [0,-1] + - zs * [1,0] * prop_caserecess_taper), - pr_r2); + for (d=[ [0,0], [0,-1], [+1,-1/prop_caserecess_taper] ]) + circleat(prcp1 + 20*d, + prc_r3); } } } @@ -1010,6 +1106,16 @@ module DemoProfiles(){ ////toplevel color("blue") CatchCatchProfile(); color("red") difference(){ EdgeProfile(); CatchCutProfile(); } } + + translate([40,-30]) { + difference(){ + %LidEdgeProfile(); + //translate(prlp10) + //PropProfile(10, 1); + } + translate(prlp10) + PropProfile(45, 0); + } } //EdgeProfile();