Horizontal air direction control vane arrangement of air conditioner

An air conditioner includes an air inlet, an air outlet, a heat exchanger disposed between the air inlet and air outlet, and an air direction control mechanism at the air outlet for regulating a direction of air discharge. The regulating mechanism includes a support member having slots, and a plurality of vanes each having a projection configured correspondingly to the slots so that once the projections have been inserted through the respective slots and then rotated, the vanes are secured to the support member. Each projection includes a hinge axle about which the vane rotates, and a pair of compression protruders projecting from opposite sides of the hinge axle. The protruders bear elastically against one surface of the support member to pull a flange portion of the vane into engagement with another surface of the support member. One of the protruders of each vane carries a fixation axle which snaps into a respective open-sided hole of a connecting member. The vanes can be rotated by sliding the connecting member, whereupon all of the vanes rotate in unison.