Patent ID: 8662970

Claim:
An air conditioning register for blowing air into a passenger compartment through an opening of a retainer, the retainer comprising: a rectangular tubular body extending laterally and configured to direct airflow into the passenger compartment; an opening of the retainer being arranged at an end of the rectangular tubular body, the opening having a rectangular shape, and long sides of the opening being oriented in a direction in a width of the passenger compartment; a pair of first inclined surfaces that face each other on an inner surface of the retainer, the first inclined surfaces being continuous with the opening and inclined to widen toward the passenger compartment; a pair of second inclined surfaces that face each other at an upstream position from the first inclined surfaces, the second inclined surfaces being connected to the first inclined surfaces and inclined to narrow toward the opening of the retainer; and a single fin arranged in the retainer at an upstream position from the opening, wherein the two first inclined surfaces include a first upper inclined surface and a first lower inclined surface, the two second inclined surfaces include a second upper inclined surface and a second lower inclined surface, the first lower inclined surface and the second lower inclined surface are continuous with each other through a first ridge, and the first upper inclined surface and the second upper inclined surface are continuous with each other through a second ridge, wherein the second ridge is located upstream of the first ridge in the airflow direction, wherein an angle between the second upper inclined surface and a horizontal plane is defined as an angle K 1 having a range of 16° to 25°, an angle between the first upper inclined surface and a horizontal plane is defined as an angle K 2 that has a range of 25° to 30°, an angle between the second lower inclined surface and a horizontal plane is defined as an angle K 3 that has a range of 20° to 30°, and an angle between the first lower inclined surface and a horizontal plane is defined as an angle K 4 that has a range of 20° to 30°, and wherein the single fin is arranged in such a manner that an angle of the single fin with respect to a horizontal plane is adjusted between a first angular position at which the single fin is located along one of the two second inclined surfaces and a second angular position at which the single fin is located along another one of the second inclined surfaces, the single fin being configured to direct airflow upwardly when the angle of the single fin is adjusted to one of the first and second angular positions and to direct airflow downwardly when the angle of the single fin is adjusted to another one of the first and second angular positions.