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Print-in-place: push button with flexure return and click

Name: Print-in-place: push button with flexure return and click dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How do you 3D print a spring-loaded push button with a click? · Hardware · basis: Xem Studio design: compliant (flexure) mechanism, planar; one designed running gap of 0.40 mm

Also called: print in place button, compliant push button, 3d printed button with spring, flexure button stl, clicky button print

Exact dimensions. True size, with no printing tolerance added.

length: 52.0 mm
width: 48.0 mm
height: 8.0 mm

Notes

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.

Print-in-place: push button with flexure return and click size chart

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

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem Studio

Print-in-place mechanism design (geometry computed in the generator)

web

Xem Studio design

Free files

★ Free files 2 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

print-in-place-push-button-flexure-assembly	The whole print as laid on the bed (1 bodies, already assembled); STEP keeps each moving body a separate solid	STEP · STL
print-in-place-push-button-flexure-button	Housing, plunger, flexure beams and click arm: one part	STEP · STL

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Plain text: sheet.txt · JSON: /api/geometry?object=print-in-place-push-button-flexure