Pull up shelf 2

Blue slider, orange shelf and yellow rockers create a parallelogram mechanism. Pull and raise the shelf to bring it to the upper position.
The green cams and red pins control the rotation of the yellow rockers.
This is an attempt to find a mechanism applicable to the typewriter floor shown at
https://youtu.be/pusY6oSDu58

STEP files of this video:
https://www.mediafire.com/file/91k5d9vpqrb3eav/PullUpShelf2STEP.zip/file
Inventor files of this video:
https://www.mediafire.com/file/il8gxa0v9w5oeb1/PullUpShelf2Inv.zip/file

Видео Pull up shelf 2 канала thang010146