DESKTOP-PUHFO60\dsx2016
646cf45797
Put DHT11 in a flush rear snap pocket with slight proud grill; nest front lip into back groove in the viewer. Co-authored-by: Cursor <cursoragent@cursor.com>
234 lines
7.6 KiB
Python
234 lines
7.6 KiB
Python
#!/usr/bin/env python3
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"""
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CYD climate case — clean clamshell.
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- Front: screen bezel + male lip
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- Back: cavity + female groove + DHT11 snap pocket flush in back wall (tip proud ~1.6mm)
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- No side “boxes”: removed bulky stand block and external DHT hang-on bay
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"""
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from __future__ import annotations
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from pathlib import Path
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import trimesh
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from trimesh.creation import box, cylinder
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PCB_L, PCB_W = 86.0, 50.0
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MH_INSET = 4.0
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DISP_X, DISP_L, DISP_W, DISP_H = 8.0, 69.0, 50.0, 4.0
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VIEW_L, VIEW_W, VIEW_IX, VIEW_IY = 59.5, 45.0, 7.0, 2.5
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WALL, GAP = 2.4, 0.35
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BEZEL_T = 2.2
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CAVITY = 8.0
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LIP_H, LIP_CLEAR = 2.2, 0.2
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USB_W, USB_H, USB_Y = 15.0, 9.0, 30.5
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SCREW, BOSS_OD, BOSS_ID = 3.3, 7.0, 2.5
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# DHT11 module pocket (from OUTSIDE of back face z=0)
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DHT_L, DHT_W, DHT_H = 16.0, 12.5, 7.5
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DHT_PROUD = 1.6
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INNER_L = PCB_L + 2 * GAP
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INNER_W = PCB_W + 2 * GAP
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OUTER_L = INNER_L + 2 * WALL
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OUTER_W = INNER_W + 2 * WALL
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SKIRT = DISP_H + 1.0
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# Back total height to mating plane (top of female groove floor)
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BACK_BODY_H = WALL + CAVITY # rim starts here
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FRONT_BODY_H = BEZEL_T + SKIRT
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MH = [
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(MH_INSET, MH_INSET),
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(PCB_L - MH_INSET, MH_INSET),
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(PCB_L - MH_INSET, PCB_W - MH_INSET),
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(MH_INSET, PCB_W - MH_INSET),
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]
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def aabb(x0, y0, z0, x1, y1, z1) -> trimesh.Trimesh:
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xa, xb = sorted((float(x0), float(x1)))
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ya, yb = sorted((float(y0), float(y1)))
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za, zb = sorted((float(z0), float(z1)))
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dx, dy, dz = xb - xa, yb - ya, zb - za
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if min(dx, dy, dz) < 1e-6:
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raise ValueError(f"degenerate {[xa, ya, za, xb, yb, zb]}")
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m = box(extents=[dx, dy, dz])
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m.apply_translation([xa + dx / 2, ya + dy / 2, za + dz / 2])
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return m
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def U(*ms: trimesh.Trimesh) -> trimesh.Trimesh:
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r = ms[0]
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for m in ms[1:]:
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r = r.union(m, engine="manifold")
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return r
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def D(a: trimesh.Trimesh, *ss: trimesh.Trimesh) -> trimesh.Trimesh:
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r = a
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for s in ss:
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r = r.difference(s, engine="manifold")
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return r
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def make_front() -> trimesh.Trimesh:
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"""
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Z=0: outer screen face
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Z=FRONT_BODY_H: open rim with male lip extending to FRONT_BODY_H+LIP_H
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"""
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body = aabb(0, 0, 0, OUTER_L, OUTER_W, FRONT_BODY_H)
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hollow = aabb(WALL, WALL, BEZEL_T, OUTER_L - WALL, OUTER_W - WALL, FRONT_BODY_H + 1)
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vx = WALL + GAP + DISP_X + VIEW_IX
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vy = WALL + GAP + VIEW_IY
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view = aabb(vx - 0.2, vy - 0.2, -0.5, vx + VIEW_L + 0.2, vy + VIEW_W + 0.2, BEZEL_T + 0.5)
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sx = WALL + GAP + DISP_X - 0.2
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pocket = aabb(
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sx, WALL + GAP - 0.1, BEZEL_T - 0.05,
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sx + DISP_L + 0.4, WALL + GAP + DISP_W + 0.1, BEZEL_T + DISP_H + 0.6,
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)
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out = D(body, hollow, view, pocket)
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# male lip: thin wall ring protruding past rim
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lip_out = aabb(
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WALL - 1.0, WALL - 1.0, FRONT_BODY_H - 0.05,
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OUTER_L - (WALL - 1.0), OUTER_W - (WALL - 1.0), FRONT_BODY_H + LIP_H,
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)
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lip_in = aabb(
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WALL + LIP_CLEAR, WALL + LIP_CLEAR, FRONT_BODY_H - 0.2,
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OUTER_L - WALL - LIP_CLEAR, OUTER_W - WALL - LIP_CLEAR, FRONT_BODY_H + LIP_H + 0.5,
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)
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out = U(out, D(lip_out, lip_in))
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for px, py in MH:
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hole = cylinder(radius=SCREW / 2 + 0.1, height=FRONT_BODY_H + LIP_H + 4, sections=28)
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hole.apply_translation([WALL + GAP + px, WALL + GAP + py, FRONT_BODY_H / 2])
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out = D(out, hole)
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out.merge_vertices()
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return out
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def make_back() -> trimesh.Trimesh:
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"""
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Z=0: exterior back face (DHT grill here, slightly proud)
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Z=BACK_BODY_H: mating plane; female groove from BACK_BODY_H to BACK_BODY_H+LIP_H
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"""
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total_h = BACK_BODY_H + LIP_H
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body = aabb(0, 0, 0, OUTER_L, OUTER_W, total_h)
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cavity = aabb(WALL, WALL, WALL, OUTER_L - WALL, OUTER_W - WALL, total_h + 1)
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out = D(body, cavity)
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# female groove: cut a channel in the top rim for the male lip
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# outer wall of groove
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groove = aabb(
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WALL - 1.0 - LIP_CLEAR, WALL - 1.0 - LIP_CLEAR, BACK_BODY_H + 0.1,
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OUTER_L - (WALL - 1.0 - LIP_CLEAR), OUTER_W - (WALL - 1.0 - LIP_CLEAR), total_h + 0.2,
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)
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groove_keep = aabb(
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WALL + 0.05, WALL + 0.05, BACK_BODY_H - 0.1,
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OUTER_L - WALL - 0.05, OUTER_W - WALL - 0.05, total_h + 0.3,
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)
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out = D(out, D(groove, groove_keep))
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# USB
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uy0 = WALL + GAP + USB_Y - USB_W / 2
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out = D(out, aabb(-0.5, uy0, WALL + 1.0, WALL + 1.0, uy0 + USB_W, WALL + 1.0 + USB_H))
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# button holes
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for y in (12.0, 22.0):
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btn = cylinder(radius=2.2, height=WALL + 2, sections=20)
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btn.apply_translation([WALL + GAP + 10, WALL + GAP + y, WALL / 2])
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out = D(out, btn)
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# screw bosses
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bosses = []
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for px, py in MH:
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x, y = WALL + GAP + px, WALL + GAP + py
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boss = cylinder(radius=BOSS_OD / 2, height=CAVITY - 0.5, sections=28)
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boss.apply_translation([x, y, WALL + (CAVITY - 0.5) / 2])
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hole = cylinder(radius=BOSS_ID / 2, height=CAVITY + 1, sections=20)
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hole.apply_translation([x, y, WALL + CAVITY / 2])
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bosses.append(D(boss, hole))
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out = U(out, *bosses)
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# ---- DHT11 flush pocket in back wall (NOT a side box) ----
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# Center on back face
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cx = OUTER_L * 0.5
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cy = OUTER_W * 0.5
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# Pocket carved from outside into wall+cavity enough for module
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pocket = aabb(
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cx - DHT_L / 2 - 0.3, cy - DHT_W / 2 - 0.3, -0.05,
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cx + DHT_L / 2 + 0.3, cy + DHT_W / 2 + 0.3, WALL + DHT_H - 1.0,
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)
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out = D(out, pocket)
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# Snap rails (卡位) left/right inside pocket — thin ledges
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rail_z0, rail_z1 = 1.2, 1.2 + 2.2
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left = aabb(cx - DHT_L / 2 - 0.3, cy - 3.2, rail_z0, cx - DHT_L / 2 + 1.0, cy + 3.2, rail_z1)
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right = aabb(cx + DHT_L / 2 - 1.0, cy - 3.2, rail_z0, cx + DHT_L / 2 + 0.3, cy + 3.2, rail_z1)
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# bottom stop (prevents falling inward)
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stop = aabb(cx - 5, cy - DHT_W / 2 + 0.5, WALL + DHT_H - 2.2, cx + 5, cy + DHT_W / 2 - 0.5, WALL + DHT_H - 1.0)
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out = U(out, left, right, stop)
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# Proud grill ring on exterior (the only intentional protrusion)
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grill_ring = aabb(
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cx - DHT_L / 2 - 1.0, cy - DHT_W / 2 - 1.0, -DHT_PROUD,
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cx + DHT_L / 2 + 1.0, cy + DHT_W / 2 + 1.0, 0.05,
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)
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grill_hole = aabb(
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cx - DHT_L / 2 + 1.5, cy - DHT_W / 2 + 1.5, -DHT_PROUD - 0.2,
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cx + DHT_L / 2 - 1.5, cy + DHT_W / 2 - 1.5, 0.2,
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)
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# slot vents in proud face
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slots = []
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for i in range(4):
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slots.append(aabb(
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cx - 5 + i * 2.8, cy - 4.5, -DHT_PROUD - 0.2,
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cx - 5 + i * 2.8 + 1.2, cy + 4.5, 0.2,
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))
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out = U(out, D(grill_ring, grill_hole, *slots))
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# tiny wire path already open via pocket into cavity
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# Simple thin kickstand rib (not a hollow “格子”) — optional small triangle
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# Skip bulky stand entirely per user feedback.
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out.merge_vertices()
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return out
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def main() -> None:
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out = Path(__file__).resolve().parent / "export"
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out.mkdir(parents=True, exist_ok=True)
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print("front…")
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front = make_front()
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print("back…")
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back = make_back()
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front.export(out / "front.stl")
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back.export(out / "back.stl")
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# write mate info for viewer
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meta = out / "mate.json"
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meta.write_text(
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"{\n"
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f' "outer_l": {OUTER_L},\n'
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f' "outer_w": {OUTER_W},\n'
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f' "front_body_h": {FRONT_BODY_H},\n'
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f' "back_body_h": {BACK_BODY_H},\n'
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f' "lip_h": {LIP_H},\n'
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f' "dht_proud": {DHT_PROUD}\n'
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"}\n",
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encoding="utf-8",
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)
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print(f"front {front.extents} watertight={front.is_watertight}")
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print(f"back {back.extents} watertight={back.is_watertight}")
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print("closed stack height ≈", BACK_BODY_H + FRONT_BODY_H, "mm (lips nest, not add full)")
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print("Wrote STLs + mate.json")
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if __name__ == "__main__":
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main()
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