Patent ID: 6472835
Filing Date: 2002-10-29
Classification: E05F,E05Y

Abstract:
An opening and closing motion control device, which is constructed so as to perform an opening and closing motion of a closing member by using a driving unit for driving the closing member, the opening and closing motion control device comprising:a flexible seal member arranged along a contact portion of a ground potential member, the contact portion being touched by the closing member when the closing member is closed; a linear electrostatic-capacity detecting unit embedded in the seal member at a predetermined distance from the contact portion of the ground potential member, for detecting an electrostatic capacity in the circumference of the electrostatic-capacity detecting unit and also outputting the so-obtained electrostatic capacity; a pinching judging unit electrically connected to the electrostatic-capacity detecting unit, for judging whether or not an object has been pinched by the closing motion of the closing member, on the basis of a variation in the electrostatic capacity corresponding to a difference between the predetermined distance and an actual distance of the linear electrostatic-capacity detection unit from the contact portion of the ground potential member; and a drive control unit electrically connected to the pinching judging unit, allowing the driving unit to either stop the closing member or start the opening motion of the closing member when the pinching judging unit judges that the object is on the point of being pinched.