Vent unit for vehicle

A vent unit for a vehicle, the vent unit comprising:

• a bezel installed on the vehicle and formed in a ring shape with a flow hole at a center, the bezel having a plurality of first through-holes circumferentially spaced apart from one another;
• a spacer overlapping and coupled to the bezel, and formed in a ring shape rotating relative to the bezel, the spacer having a plurality of second through-holes circumferentially spaced apart from one another such that conditioning air is discharged to an interior through the second through-holes and the first through-holes when the second through-holes are aligned with the first through-holes by circumferential rotation relative to the bezel;
• and
• a wing disposed in the flow hole of the bezel and coupled to the spacer through a hinge shaft, the wing configured to control discharge of conditioning air through the flow hole by axially rotating about the hinge shaft and circumferentially relatively rotating together with the spacer with respect to the bezel,
• wherein:
• the spacer includes:
• an inner spacer and an outer spacer surrounding the inner spacer, the wing is coupled to the inner spacer through the hinge shaft, the second through-holes circumferentially spaced apart from one another are formed at the outer spacer,
• protrusions are formed on an inner side of the outer spacer,
• a rotation control tab is formed on an outer side of the inner spacer and configured to slide over the protrusions of the outer spacer without interference with the protrusions when the inner spacer rotates in a first direction,
• the rotation control tab of the inner spacer is configured to engage with the protrusions of the outer spacer when the inner spacer rotates in a second direction opposite to the first direction such that the inner spacer and the outer spacer rotate together,
• the rotation control tab and the protrusions have slopes that face each other,
• the rotation control tab is made of an elastic material, and the rotation control tab and the inner spacer being formed as a single piece of material, and
• a slit is formed in the inner spacer, the rotation control tab residing within the slit, the slit being configured to allow the rotation control tab to move toward a center of the inner spacer with elasticity when the rotation control tab slides over the slopes of the protrusions.