Patent ID: 9697967
Date: 2017-07-04
CPC Classifications: G05G,H01H

Claim:
1. A rotary knob assembly capable of up and down movement, the rotary knob assembly comprising: a lower case in which an oil damper is disposed; a rotary sleeve rotatably disposed with respect to the lower case, the rotary sleeve comprising a connecting hole; a slide cam that is configured to move linearly with respect to the lower case, the slide cam comprising a pair of cam grooves which are inclined with respect to the lower case and a sleeve hole through which the rotary sleeve passes; an elastic member disposed between the slide cam and the lower case, the elastic member comprising a first end fixed to the lower case and a second end fixed to the slide cam; an up-and-down moving sleeve that is configured to move up and down with respect to the rotary sleeve, the up-and-down moving sleeve comprising a pair of up-and-down cams that are inserted in the pair of cam grooves of the slide cam; a rotary knob that is rotatably connected to the up-and-down moving sleeve, the rotary knob comprising a connecting member that is configured to be inserted in the connecting hole of the rotary sleeve; and an upper case connected to an upper side of the lower case, the upper case being configured to limit up and down movement of the rotary knob, wherein a moving speed of the slide cam is controlled by the oil damper.