Air blowing device

An air blowing device comprising:

• a tubular body configured to form an air outflow channel, the tubular body having a rear-end opening portion allowing an air to flow into the tubular body and a front-end open portion allowing the air to blow out from the tubular body;
• an annular member supported in the tubular body so as to be coaxially rotatable with respect to the tubular body about an axis of the tubular body;
• at least one airflow direction adjustment plate supported in the annular member, by a pair of pivot portions, so as to be un-rotatable with respect to the annular member about an axis of the annular member and be pivotally movable with respect to the annular member about a common pivotal axis or each pivotal axis perpendicular to the axis of the annular member, the pair of pivot portions projecting outwardly to be aligned with the common pivotal axis or the each pivotal axis, the at least one airflow direction adjustment plate being configured to adjust a direction of the air blown out from the tubular body;
• and
• an operation load application member adjusting:
• a rotational operation load induced upon the annular member being rotated with respect to the tubular body;
• and
• a pivotal operation load induced upon the at least one airflow direction adjustment plate being pivotally moved with respect to the annular member,
• the tubular body including an annular projection portion having a plurality of projections annularly arranged along inner surface of the tubular body,
• the at least one airflow direction adjustment plate being configured to pivotally move in an interlocking relation in a movable range from a first position at which the front-end opening portion of the tubular body is closed by one plate or a plurality of plates including the at least one airflow direction adjustment plate to a second position at which the front-end opening portion of the tubular body is not closed,
• the operation load application member including:
• a pivot support portion;
• a leg portion;
• and a connection portion connecting the pivot support portion and the leg portion, the pivot support portion, the leg portion, and the connection portion being integrally formed of same material in an inseparable manner,
• the pivot support portion having a bearing hole, the pivot support portion being engaged with an inner wall of the annular member, and one of the pivot portions aligned with the common pivotal axis or the each pivotal axis being press-fitted into the bearing hole,
• the leg portion having, at its tip:
• a first projection projecting toward a direction along the axial direction of the annular member and engaging with the annular projection portion;
• and a second projection projecting toward a radially outward direction and pressing an inner wall of the tubular body toward the radially outward direction, and
• the connection portion curving to project toward a radially inward direction, and a predetermined part of the at least one airflow direction adjustment plate contacting with a radially inside surface of the connection portion and pressing the radially inside surface toward the radially outward direction only upon the at least one airflow direction adjustment plate being positioned within a predetermined range, the predetermined range being near the first position in the movable range and not including the first position, and the predetermined part being locked with the connection portion upon the at least one airflow direction adjustment plate being positioned at the first position so as to maintain the at least one airflow direction adjustment plate to be positioned at the first position.