波塞A20空气导管基础

Bose A20 Cannula Base

2024-04-05 06:02:51

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Summary

Designed for use with this boom-cannula refill, but an alternate base/attachment:
https://www.sportys.com/aithre-boom-cannula-long-arm-refill.html

For use on the Bose A20, and with the mic on the left side of headset; a remix would be needed to invert it for right side use.

Two part print - assembled via a 8-32 screw and nut. A steel washer is recommended in the center of the joint for smoothness, and loctite on the nut to help retain tension when pivoting.

Screw holes may need minor drilling to match the screw used; clearance should be tight.

Double-sided adhesive tape is used on the flat portion of the cup to retain to the headset, similar to other commercial options.

Arm hole is sized for the white rubber/silicone tubing supplied in the refill kit; dish soap is useful to feed it through as the fit is intentionally tight for friction. Flexible arm will then insert into the tubing as needed.

I cut the white tubing short to then switch to kink-proof O2 tubing near the arm; clips included to link the O2 tubing to the mic wire - 6 or so are needed.

Recommend printing the arm vertically with the flat face down; tree supports tend to be easier to remove from the tubing port.