Print-in-place: push button with flexure return and click — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/print-in-place-push-button-flexure/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design: compliant (flexure) mechanism, planar; one designed running gap of 0.40 mm
Catalog version: 2026-10-20

Overall (mm): length 52.0, width 48.0, height 8.0
- 3D print in place — prints already assembled, moving, in one job. Drawn at true size with no printer tolerance added; the 0.40 mm running gaps are part of the design.
- Running gap 0.40 mm per side, 0.80 mm on diameter — part of the design, drawn as is. On the 45° faces the same 0.40 mm is measured square to the face (0.57 mm along the axis).
- Bed: flat, everything 8 mm tall straight up from the bed: housing, plunger, flexures and click arm are one printed part with 0.40 mm slots between the moving and fixed edges.
- Support while printing: none needed — a straight extrusion; the two mounting holes through the bottom wall are teardrops.
- Captured: the plunger hangs on two parallel flexure beams (21 × 1.0 × 8) from the housing's left wall; its shoulder sits 0.40 mm under the housing top, so it cannot come out, and a block 3.0 mm below it is the hard stop.
- Freeing it: press the plunger fully a few times; the first press clears any strands in the 0.40 mm slots.
- Motion: 3 mm of travel; the tooth on the plunger meets the bump on the click arm at 1.4 mm, pushes the arm 0.6 mm aside and snaps past at 2 mm (a click, and a second one on the way back); the flexures return the plunger. Beam shortening shifts it 0.26 mm sideways at full travel.

key  value  what
gap_mm  0.4  running gap per side on every moving interface (radial, axial, under captured parts) — part of the design, not a tolerance
housing_mm  52 × 44 × 8  outside
plunger_w_mm  12  where it leaves the housing (opening 12.8)
plunger_out_mm  4  above the housing at rest
travel_mm  3  to the hard stop
click_contact_mm  1.4  travel where the plunger's tooth meets the click bump
click_mm  2.0  travel where the tooth snaps past the bump
click_overlap_mm  0.6  how far the bump arm is pushed aside
flexure_l_mm  21.0  two parallel beams
flexure_t_mm  1.0  beam thickness (in the plane)
flexure_h_mm  8.0  beam height = print height
side_drift_mm  0.26  plunger's sideways shift at full travel from beam shortening (0.6 d²/L), inside the 0.40 gap
up_stop_mm  0.4  shoulder under the housing top: the plunger cannot be pulled out
mount_holes  2 × Ø3.4 through the bottom wall  teardrop

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Xem Studio: Print-in-place mechanism design (geometry computed in the generator) — web — Xem Studio design — https://xemstudio.com/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/print-in-place-push-button-flexure/index.json
API: https://xemstudio.com/api/geometry?object=print-in-place-push-button-flexure