Vehicle air vent with knob for controlling a first wing, second wing and guide case

A vehicle air vent comprising:

• a duct housing;
• a first wing assembly disposed at a side of an outlet of the duct housing;
• a second wing assembly disposed in the duct housing;
• a knob coupled to the first wing assembly;
• and
• a guide assembly coupled to the first wing assembly and rotatable in conjunction with movement of the knob,
• wherein:
• the knob includes a knob pin movably disposed in the first wing assembly,
• the guide assembly includes:
• a guide case which is disposed in the duct housing and configured to guide a flow of air;
• a first link coupled to an end portion of the guide case and disposed outside the duct housing;
• and
• a second link which connects the first link to the first wing assembly,
• the second link is rotatable according to the first wing assembly rotating along with the knob,
• the duct housing includes a stopper having a pair of protrusions each of which is obliquely disposed on an outer surface of the duct housing and comes into contact with the first link, and
• the first link is rotatable between the pair of protrusions and a rotation of the guide case stops when the first link comes into contact with one of the pair of protrusions.