Automatic opening and closing device for a window
AssigneeJidosha Denki Kogyo Kabushiki Kaisha
InventorsTakeshi Itoh, Akihiko Tsukahara
Life of this patent
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Abstract
An automatic opening and closing device for a window which has a forwardly and reversely rotatable motor for opening and closing the widow, switching means which instructs said motor to rotate, pulse-detecting means which detects a pulse generated along with a rotation of said motor, counting means which counts a pulse number detected by said pulse-detecting means and rotation-controlling means which performs rotation-control to said motor on basis of a count number counted by said counting means and a predetermined count number is dislosed, by which it is possible to stop the opening or closing action of the window at a halfway, or possible to convert the action of the window in the reverse direction.
Claims5
An automatic opening and closing device for a window comprising:
- a forwardly and reversely rotatable motor for opening and closing a window;
- and
- control circuit means connected to said motor and including:
- switching means for instructing said motor to rotate;
- pulse-detecting means for detecting a pulse generated by the rotation of said motor;
- counting means for counting pulses detected by said pulse-detecting means and for resetting a count number to a predetermined count number according to a prescribed signal;
- holding means for holding the rotation of said motor according to a signal output from said switching means;
- and
- holding-cancel signal generating means for detecting a count number counted by said counting means and for cancelling a holding state of said holding means by generating a holding-cancel signal when the count number reaches a predetermined reference value during an opening operation of the window;
- wherein said holding-cancel signal generating means comprises:
- a reference value-setting circuit for setting said predetermined reference value corresponding to a car speed;
- and
- a holding-cancel signal generating circuit for comparing the count number counted by said counting means with said predetermined reference value and for outputting said holding-cancel signal when the count number reaches said predetermined reference value corresponding to said car speed.
An automatic opening and closing device for a window comprising:
- a forwardly and reversely rotatable motor for opening and closing a window;
- and
- control circuit means connected to said motor and including:
- switching means for instructing said motor to rotate;
- pulse-detecting means for detecting a pulse generated by rotation of said motor;
- counting means for counting a pulse-number detected by said pulse-detecting means;
- window position-detecting means for detecting whether or not said window is near to a closed position on the basis of a count number outputted from said counting means;
- speed operation means for calculating a rotational speed of said motor on the basis of the pulse detected by said pulse-detecting means;
- speed change operation means for calculating a rate of rotational speed change against a previously measured value of said motor on the basis of an output signal of said speed operation means;
- window action-detecting means to detect whether said window is in a closing action;
- reversing instructive signal generating means for reversing said motor for opening said window if an output signal from said speed change operation means exceeds a predetermined first set point when said window action-detecting means detects said window to be in said closing action and said window position-detecting means detects said window to be not near to the closed position;
- and
- stop instructive signal generating means for stopping said motor if the output from said speed change operation means exceeds a predetermined second set point when said window action-detecting means detects said window to be in said closing action and said window position-detecting means detects said window to be near to the close position.
Dependencies are inferred from the claim text.