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VEHICLE DOOR OPENING WARNING SYSTEM

  • US 20130091770A1
  • Filed: 10/14/2011
  • Published: 04/18/2013
  • Est. Priority Date: 10/14/2011
  • Status: Active Grant
First Claim
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1. A vehicle door opening warning system, comprising a car door-opening control unit installed in a linkage of a car that extends out of a car door frame of said car and is movable to open/close a car door that is hinged to said car door frame, a first normally closed contact switch and a first normally opened contact switch mounted in said car door frame, an approaching object sensor mounted in said car door, at least one warning light mounted in said car door, a buzzer, a relay, a battery, and a controller, said car door-opening control unit comprising a holder frame having a through hole for the passing of said linkage, an electromagnetic valve mounted at a bottom side inside said holder frame and operable to move a reciprocating rod thereof up and down, a stop bar pivotally mounted in said holder frame and having a free end thereof supported on said reciprocating rod and movable with said reciprocating rod to one of a first position where the free end of said stop bar is stopped at a first stop portion of said linkage to prohibit said car door from being opened, a second position where the free end of said stop bar is stopped at a second stop portion of said linkage 1 to prohibit said car door from being opened, and a third position where the free end of said stop bar is released from said linkage for allowing said car door to be opened, wherein when a person is opening said car door, said first normally closed contact switch is released from the pressure of said car door for allowing the battery power supply of said battery to be conducted to said controller to drive said sensor and said warning lights, causing said approaching object sensor to start sensing and said at least one warning light to give a visual warning signal;

  • when said approaching object sensor senses the approaching of an external object, said approaching object sensor gives a signal to said controller, causing said controller to drive said buzzer in giving an audio warning signal and to switch on said relay in starting said electromagnetic valve so that said electromagnetic valve extends out said reciprocating rod to lift said stop bar to said first position where said stop bar is stopped at said first stop portion of said linkage to prohibit said car door from being opened;

    after the external object passed and said approaching object sensor senses no signal, said controller receives no signal from said approaching object sensor and switches off said relay to cut off the battery power supply of said battery from said electromagnetic valve, allowing said stop bar to be lowered with said reciprocating rod to said third position for allowing said car door to be opened;

    when said approaching object sensor senses a signal again at this time, said controller switches on said relay to start said electromagnetic valve again, enabling said stop bar to be lifted by said reciprocating rod to said second position.

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