Motor actuator for air conditioning system

A motor actuator for an air conditioning system, comprising:

• a driving motor;
• an output shaft rotated by a driving force from said driving motor;
• contact mounting means rotatable together with said output shaft;
• movable contact means mounted to said contact mounting means;
• a fixed circuit board;
• fixed contact means mounted on said circuit board;
• said movable contact means being arranged in sliding contact with said fixed contact means so as to be slidable over said fixed contact means;
• hysteresis imparting means arranged between said output shaft and said contact mounting means for making said contact mounting means angularly movable relative to said output shaft to thereby impart a predetermined hysteresis to the sliding of said movable contact means over said fixed contact means;
• and
• means for varying the magnitude of said hysteresis, imparted by said hysteresis imparting means, in response to angular position of said output shaft.

A motor actuator for an air conditioning system, comprising:

• a driving motor;
• an output shaft rotated by a driving force from said driving motor;
• an output gear mounted on said output shaft;
• a switch disc arranged in concentric relation to said output shaft and rotatable together with said output shaft;
• a circuit board interposed between said output gear and said switch disc;
• switch means provided on said circuit board and at least one of said output gear and said switch disc;
• and
• hysteresis imparting means for imparting a hysteresis to the rotation of said switch disc with respect to the rotation of said output shaft.

A motor actuator for an air conditioning system, comprising:

• a driving motor;
• an output shaft rotated by a driving force from said driving motor, said output shaft extending substantially vertically;
• an output gear mounted on said output shaft;
• a switch disc arranged below said output gear in concentric relation thereto and rotatable together with said output gear;
• a circuit board interposed between said output gear and said switch disc;
• switch means arranged between said circuit board and said switch disc and including movable contact means mounted on an upper side face of said switch disc and fixed contact means mounted on a lower side face of said circuit board, said movable contact means being in sliding contact with said fixed contact means so as to be slidable over said fixed contact means;
• and
• hysteresis imparting means for retaining said switch disc from angular movement together with said output gear through a predetermined angular extent to thereby impart a hysteresis to the rotation of said movable contact means mounted on said upper side face of said switch disc with respect to the rotation of said output shaft.