초록 ▼

A motor actuator for use in an automobile air-conditioner for actuating air-mix door, includes an electric circuit for controlling the rotational speed of a motor depending on various conditions such, for example, as a vehicle compartment temperature, and a mechanical limit switch for limiting or re

A motor actuator for use in an automobile air-conditioner for actuating air-mix door, includes an electric circuit for controlling the rotational speed of a motor depending on various conditions such, for example, as a vehicle compartment temperature, and a mechanical limit switch for limiting or restricting the extent of angular movement of the air-mix door, or an electric circuit for the limitation of the angular movement of the air-mix door. According to a preferred embodiment, a built-in switching unit having a mechanical switch disposed in a first housing for producing control signals for various components for the air-conditioner, and a motor actuator having a motor and an electric circuit disposed in a second housing are detachably assembled together by a locking lug and a mating retainer recess.

대표청구항 ▼

A motor actuator for an air-mix door of an automobile air-conditioner, comprising: (a) a motor for driving the air-mix door; (b) a driver circuit for said motor, said driver circuit being operative to energize said motor based on the combination of two input signals and also to de-energize said moto

A motor actuator for an air-mix door of an automobile air-conditioner, comprising: (a) a motor for driving the air-mix door; (b) a driver circuit for said motor, said driver circuit being operative to energize said motor based on the combination of two input signals and also to de-energize said motor when said two input signals are identical to one another; (c) a stop switch for supplying a stop signal to said driver circuit for causing said driver circuit to stop energizing said motor, said stop switch including (c-i) a movable contact adapted to be turned through a predetermined angular distance simultaneously with operation of said motor, (c-ii) a first fixed electrode disposed at one end of said predetermined angular distance and engageable with. with said movable contact, and (c-iii) a second fixed electrode disposed at the other end of said predetermined angular distance and engageable with said movable contact; (d) a position sensor for detecting the position of said movable contact; and (e) a comparator circuit for detecting a predetermined output signal from said position sensor while the air-conditioner is operating in a vent mode and equalizing the potential of one of said first and second fixed electrodes and the potential of the other fixed electrode to thereby limiting rotation of said motor toward said other fixed electrode.