Pin Hinge Leaf V1

implemented unverified

One leaf of a pin hinge: a mounting plate whose edge carries interleaved knuckle segments around a teardrop axial bore. Print a side-a and a side-b leaf, slide a hardware pin (nail, music wire) through — mode: bolt turns the pair into a FRICTION hinge held by bolt preload. Printed-in-place hinges are deliberately refused: a fused pin is a broken hinge. Torque and cycle life are hardware and assembly properties — the honesty check says so out loud.

Built from a real example — orbit to inspect.

Declaration example

A minimal product declaration for this archetype — exposed parameters at their defaults. Validate and build it with forge validate / forge build.

schema: product/v1
id: my_pin_hinge_leaf
archetype: pin_hinge_leaf_v1@1

params:
  leaf_l: 60mm
  leaf_w: 25mm
  side: a
  mode: pin

modifiers:
  - id: fillet_soften
    target: leaf_lightening

Parameters

parameter	type	default	range	role
`leaf_l`hinge length along the pin axis	`length`	`60mm`	`30mm … 140mm`	functional	exposed
`leaf_w`	`length`	`25mm`	`15mm … 60mm`	functional	exposed
`t`	`length`	`3mm`	`2.4mm … 6mm`	structural
`corner_r`	`length`	`3mm`	`1mm … 8mm`	aesthetic
`knuckle_d`	`length`	`8mm`	`5mm … 14mm`	functional
`knuckles`TOTAL knuckle slots across the pair (odd; side a takes the extras)	`count`	`5`	`3 … 9`	functional
`side`	`choice`	`a`	`a \| b`	assembly	exposed
`mode`pin = hardware pin slips; bolt = friction hinge via preload	`choice`	`pin`	`pin \| bolt`	assembly	exposed
`hinge_gap`	`length`	`0.4mm`	`0.2mm … 0.8mm`	manufacturing
`pin_d`hardware pin diameter (pin mode)	`length`	`3mm`	`1.5mm … 6mm`	assembly
`pin_clearance`	`length`	`0.35mm`	`0.2mm … 0.6mm`	manufacturing
`bolt`through bolt (bolt mode)	`choice`	`m4`	`m3 \| m4 \| m5`	assembly
`screw`leaf mounting screws	`choice`	`M3`	`M3 \| M4`	assembly
`screw_spacing`	`length`	`expr(leaf_l - 20)`	`10mm … 120mm`	assembly
`screw_row_cy`	`length`	`expr(-(leaf_w / 2 - 7))`	`-30mm … 0mm`	assembly