DESKTOP-PUHFO60\dsx2016
ce04e7bb1a
Regenerate STLs, update viewer closed pose, and document assembly. Co-authored-by: Cursor <cursoragent@cursor.com>
309 lines
11 KiB
Python
309 lines
11 KiB
Python
#!/usr/bin/env python3
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"""
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CYD climate case STL generator.
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Design intent:
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- DHT11 on the BACK cover, held by snap/clip posts (卡位), tip slightly proud of back face
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- Front + back close with a interlocking lip (合盖)
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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 # noqa: F401 — cylinder used for holes/bosses
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# ---- mm ----
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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, CAVITY = 2.2, 7.5
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LIP_H, LIP_T = 2.4, 1.15 # front male / back female for 合盖
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USB_W, USB_H, USB_Y = 15.0, 9.0, 30.5
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STAND_FOOT = 16.0
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SCREW = 3.3
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BOSS_OD, BOSS_ID = 7.0, 2.5
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# DHT11 module (common PCB module ~15.5 x 12 x 7.5 + pins)
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DHT_MOD_L, DHT_MOD_W, DHT_MOD_H = 16.0, 12.5, 8.0
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DHT_PROUD = 1.8 # how much grill/tip sticks out past back outer face
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DHT_CLIP = 1.1 # undercut lip thickness for 卡位
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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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SHELL_H = CAVITY + WALL
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SKIRT_H = DISP_H + 1.0
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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 dx < 1e-6 or dy < 1e-6 or dz < 1e-6:
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raise ValueError(f"degenerate box {[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(*meshes: trimesh.Trimesh) -> trimesh.Trimesh:
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r = meshes[0]
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for m in meshes[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, *subs: trimesh.Trimesh) -> trimesh.Trimesh:
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r = a
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for s in subs:
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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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"""Front bezel: screen window + skirt + male lip for closing onto back."""
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z1 = BEZEL_T + SKIRT_H + LIP_H
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body = aabb(0, 0, 0, OUTER_L, OUTER_W, BEZEL_T + SKIRT_H)
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# hollow skirt
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cavity = aabb(WALL, WALL, BEZEL_T, OUTER_L - WALL, OUTER_W - WALL, BEZEL_T + SKIRT_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 - 0.25, vy - 0.25, -0.5, vx + VIEW_L + 0.25, vy + VIEW_W + 0.25, BEZEL_T + 0.6)
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sx = WALL + GAP + DISP_X - 0.25
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pocket = aabb(
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sx, WALL + GAP - 0.15, BEZEL_T - 0.05,
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sx + DISP_L + 0.5, WALL + GAP + DISP_W + 0.15, BEZEL_T + DISP_H + 0.8,
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)
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out = d(body, cavity, view, pocket)
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# male lip (inserts into back female groove)
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lip_outer = aabb(
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WALL - LIP_T, WALL - LIP_T, BEZEL_T + SKIRT_H - 0.05,
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OUTER_L - (WALL - LIP_T), OUTER_W - (WALL - LIP_T), BEZEL_T + SKIRT_H + LIP_H,
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)
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lip_inner = aabb(
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WALL + 0.15, WALL + 0.15, BEZEL_T + SKIRT_H - 0.1,
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OUTER_L - WALL - 0.15, OUTER_W - WALL - 0.15, BEZEL_T + SKIRT_H + LIP_H + 0.5,
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)
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lip = d(lip_outer, lip_inner)
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out = u(out, lip)
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# screw clearance through bezel
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for px, py in MH:
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x = WALL + GAP + px
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y = WALL + GAP + py
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hole = cylinder(radius=SCREW / 2 + 0.1, height=z1 + 4, sections=28)
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hole.apply_translation([x, y, (BEZEL_T + SKIRT_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 dht_pocket_on_back() -> trimesh.Trimesh:
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"""
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Pocket on outer back face (z=0 side is exterior bottom of shell).
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Module inserts from outside; clips hold it; grill protrudes DHT_PROUD.
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Coordinate: back shell sits z=0 exterior, z=SHELL_H toward PCB.
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Pocket carved into floor from outside, clips on the outer face.
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"""
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# center DHT on back wall area away from USB (right-ish of board back)
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cx = WALL + GAP + 62
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cy = WALL + GAP + PCB_W / 2
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# outer boss that contains the module (sits mostly outside z<=0)
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bay_l = DHT_MOD_L + 3.2
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bay_w = DHT_MOD_W + 3.2
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bay_h = DHT_MOD_H + WALL * 0.6 + DHT_PROUD
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# bay extends below z=0 (outside) and a bit into floor
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bay = aabb(
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cx - bay_l / 2, cy - bay_w / 2, -bay_h + WALL * 0.35,
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cx + bay_l / 2, cy + bay_w / 2, WALL + 0.2,
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)
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# cavity for module (from outside)
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cav = aabb(
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cx - DHT_MOD_L / 2 - 0.25, cy - DHT_MOD_W / 2 - 0.25, -bay_h + WALL * 0.35 + 1.0,
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cx + DHT_MOD_L / 2 + 0.25, cy + DHT_MOD_W / 2 + 0.25, WALL - 0.3,
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)
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# window through back wall into interior for wires (small)
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wire = aabb(
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cx - 3.5, cy - 4.0, WALL - 0.5,
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cx + 3.5, cy + 4.0, WALL + 2.5,
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)
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# front face of bay: grill opening, leaving rim so tip is proud
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grill = aabb(
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cx - DHT_MOD_L / 2 + 1.2, cy - DHT_MOD_W / 2 + 1.2, -bay_h - 0.2,
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cx + DHT_MOD_L / 2 - 1.2, cy + DHT_MOD_W / 2 - 1.2, -bay_h + WALL + DHT_PROUD + 0.5,
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)
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# side vent slots
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vents = []
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for i in range(3):
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vents.append(aabb(
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cx - DHT_MOD_L / 2 - 2, cy - 4 + i * 3.2, -bay_h + 3,
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cx - DHT_MOD_L / 2 + 0.2, cy - 4 + i * 3.2 + 1.4, -bay_h + 8,
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))
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vents.append(aabb(
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cx + DHT_MOD_L / 2 - 0.2, cy - 4 + i * 3.2, -bay_h + 3,
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cx + DHT_MOD_L / 2 + 2, cy - 4 + i * 3.2 + 1.4, -bay_h + 8,
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))
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# 卡位: L/R snap ledges + end stops (press-fit module from outside)
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z_base = -bay_h + WALL * 0.35 + 1.2
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left_clip = aabb(
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cx - DHT_MOD_L / 2 - 1.2, cy - 3.5, z_base,
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cx - DHT_MOD_L / 2 + DHT_CLIP, cy + 3.5, z_base + 3.2,
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)
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right_clip = aabb(
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cx + DHT_MOD_L / 2 - DHT_CLIP, cy - 3.5, z_base,
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cx + DHT_MOD_L / 2 + 1.2, cy + 3.5, z_base + 3.2,
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)
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# end stop ledge near grill (prevents module falling out front)
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stop = aabb(
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cx - DHT_MOD_L / 2 + 1.5, cy - DHT_MOD_W / 2 + 0.8, -bay_h + WALL * 0.35 + 0.8,
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cx + DHT_MOD_L / 2 - 1.5, cy + DHT_MOD_W / 2 - 0.8, -bay_h + WALL * 0.35 + 0.8 + 1.0,
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)
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# rear retention bar (卡入后沿)
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retain = aabb(
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cx - 5.0, cy - DHT_MOD_W / 2 - 0.2, WALL - 2.2,
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cx + 5.0, cy + DHT_MOD_W / 2 + 0.2, WALL - 0.4,
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)
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bay = d(bay, cav, grill, wire, *vents)
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bay = u(bay, left_clip, right_clip, stop, retain)
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return bay
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def make_back() -> trimesh.Trimesh:
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"""Back shell: cavity, female lip, screw bosses, stand, DHT snap bay on outer back."""
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body = aabb(0, 0, 0, OUTER_L, OUTER_W, SHELL_H + LIP_H)
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cavity = aabb(WALL, WALL, WALL, OUTER_L - WALL, OUTER_W - WALL, SHELL_H + LIP_H + 1)
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# female groove for front lip (near top rim)
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groove = aabb(
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WALL - LIP_T - 0.15, WALL - LIP_T - 0.15, SHELL_H,
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OUTER_L - (WALL - LIP_T - 0.15), OUTER_W - (WALL - LIP_T - 0.15), SHELL_H + LIP_H + 0.2,
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)
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# keep inner wall so groove is a channel, not open to cavity fully
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# actually: cut a U-channel from the top rim
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groove_cut = aabb(
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WALL - LIP_T - 0.1, WALL - LIP_T - 0.1, SHELL_H - 0.05,
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OUTER_L - (WALL - LIP_T - 0.1), OUTER_W - (WALL - LIP_T - 0.1), SHELL_H + LIP_H + 0.3,
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)
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keep_inner = aabb(
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WALL + 0.05, WALL + 0.05, SHELL_H - 0.2,
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OUTER_L - WALL - 0.05, OUTER_W - WALL - 0.05, SHELL_H + LIP_H + 0.5,
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)
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# rim solid then groove: start from body, remove cavity, then remove groove channel between lip walls
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out = d(body, cavity)
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# Add rim collar then cut female slot
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collar = aabb(0, 0, SHELL_H - 0.05, OUTER_L, OUTER_W, SHELL_H + LIP_H)
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collar_in = aabb(WALL + 0.2, WALL + 0.2, SHELL_H - 0.2, OUTER_L - WALL - 0.2, OUTER_W - WALL - 0.2, SHELL_H + LIP_H + 0.5)
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collar = d(collar, collar_in)
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out = u(out, collar)
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# female slot (accepts front male lip)
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slot = aabb(
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WALL - LIP_T - 0.12, WALL - LIP_T - 0.12, SHELL_H + 0.15,
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OUTER_L - (WALL - LIP_T - 0.12), OUTER_W - (WALL - LIP_T - 0.12), SHELL_H + LIP_H - 0.15,
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)
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slot_keep = aabb(
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WALL + 0.05, WALL + 0.05, SHELL_H,
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OUTER_L - WALL - 0.05, OUTER_W - WALL - 0.05, SHELL_H + LIP_H + 0.2,
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)
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# slot is the ring between slot outer and slot_keep — cut only the ring
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slot_ring = d(slot, slot_keep)
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out = d(out, slot_ring)
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# USB
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usb_y0 = WALL + GAP + USB_Y - USB_W / 2
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usb = aabb(-1, usb_y0, WALL + 1.2, WALL + 1.2, usb_y0 + USB_W, WALL + 1.2 + USB_H)
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out = d(out, usb)
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# SD optional slit
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sd = aabb(WALL + GAP + 28, OUTER_W - WALL - 1, WALL + 2, WALL + GAP + 44, OUTER_W + 1, WALL + 5)
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out = d(out, sd)
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# BOOT/RST access
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for y in (12, 22):
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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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# floor vents (not under DHT)
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vents = []
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for i in range(4):
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vents.append(aabb(WALL + 10 + i * 12, WALL + 8, -0.5, WALL + 12 + i * 12, WALL + 16, WALL + 0.5))
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out = d(out, *vents)
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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 = WALL + GAP + px
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y = WALL + GAP + py
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boss = cylinder(radius=BOSS_OD / 2, height=CAVITY - 0.4, sections=28)
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boss.apply_translation([x, y, WALL + (CAVITY - 0.4) / 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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# stand foot (desk)
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stand_len = OUTER_L * 0.7
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sx = (OUTER_L - stand_len) / 2
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foot = aabb(sx, -STAND_FOOT + 0.4, 0, sx + stand_len, WALL, SHELL_H * 0.85)
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foot_in = aabb(sx + 2, -STAND_FOOT + 2.2, WALL, sx + stand_len - 2, WALL - 0.15, SHELL_H)
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foot = d(foot, foot_in)
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rib = aabb(OUTER_L / 2 - 1.2, -STAND_FOOT + 1, WALL, OUTER_L / 2 + 1.2, WALL, SHELL_H * 0.8)
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out = u(out, foot, rib)
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# DHT11 snap bay on outer back (protruding)
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out = u(out, dht_pocket_on_back())
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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_dir = Path(__file__).resolve().parent / "export"
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out_dir.mkdir(parents=True, exist_ok=True)
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print("Building front (合盖公止口)…")
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front = make_front()
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print("Building back (DHT后盖卡位 + 母止口)…")
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back = make_back()
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front.export(out_dir / "front.stl")
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back.export(out_dir / "back.stl")
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print(f"front watertight={front.is_watertight} faces={len(front.faces)}")
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print(f"back watertight={back.is_watertight} faces={len(back.faces)}")
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print(f"Wrote {out_dir / 'front.stl'}")
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print(f"Wrote {out_dir / 'back.stl'}")
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print(f"Outer ~ {OUTER_L:.1f} x {OUTER_W:.1f} mm; DHT proud ~{DHT_PROUD} mm")
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if __name__ == "__main__":
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main()
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