Symbol 5994 from IEC 60417 - Title/Meaning: Locking, scroll; scroll lock Function/description: To indicate the status of locking and unlocking for scrolling windows on a computer screen.
Additional information: 
Published in: 3C/1501/FDIS, 3C/1513/RVD
Own work using: iso.org/obp/graphics/grs/4699e9eb-c166-4dd3-8e83-4fbff0813560 200.png
Vectorization:  Mrmw