Screwing/unscrewing tool e.g. screwdriver, includes cogwheel connected to sprocket wheel that is engaged with another cogwheel which is driven by rack connected with push-button

摘要

The tool has a cogwheel (3) connected to two trunnions (4a, 4b) and a square spindle drive (5). The cogwheel is driven by a cogwheel (9) that is turned in a direction by a ratchet mounted on an axis and pushed against a body by a spring. The cogwheel (9) is connected to a sprocket wheel (10) engaged with a cogwheel (12). The cogwheel (12) is driven by a rack connected with a push-button.