These models are for....
1) an ice rod/scoop holder that can be mounted to something (E.g., sled). I shortened the model after printing the one shown in the picture to save time printing and plastic.
2) an automatic fisherman where a ice fishing rod is mounted in holder and line is set on the trigger (see picture). When a fish pulls on the line, it sets the trigger and the rod flips up setting the hook. I also shortened the model for the rod holder have printing the one in the picture to save printing time and plastic.
The author hasn't provided the model origin yet.