Lace Lock for Snowboard Boot Liner

One of the lace lockers for my Snowboarding boots broke so I designed a parametric replacement using OnShape. 
 

This is for the thin inner laces of Snowboard Boot Liners, not the thick outer laces of the boot itself (see photo & explanation at the bottom). However this should fit any round lace that is roughly 3/32 inch (~2.5mm) in diameter. 

Model & Print Info

While you can print with PLA for testing, if you plan on using this in a cold environment then PETG is strongly recommended as it can handle low & freezing temperatures way better.

The Tightener Knob & Friction Gear are designed to be a very tight fit. Push hard to fully snap together! There are two versions of the knob for either PLA (tighter fit) or PETG (looser fit). However a small dab of super glue is also recommended to keep the parts together (be careful not to get any glue on the parts that need to slide or move).

The .3mf file is set up to print each of the 3 parts sequentially to reduce stringing and does not require any supports. However, I had some bed adhesion issues with PETG and the textured sheet, so I added a brim on to the Main Body piece.

Usage

The laces can be a little tricky to thread and may require a little push from a small screwdriver or pen. The flat square part of the “Main Body” should be pointing to the ground with the “Tightener Knob” facing out and way from your body.

What are Liners?

REI has a great explanation

“Liner” refers to the entire inner boot of a snowboard boot. Liners are commonly made from ethylene vinyl acetate (EVA), which is a lightweight, moldable polymer that most people associate with foam rubber. As it does in running shoes, EVA provides cushioning, stability and insulation for a snowboarder's feet.

Image Credit: Simon Jack Burgess - Snowboard Boots Buyers Guide