Door handle, especially for vehicle, provided with an inertial security system
A handle for a motor vehicle door comprising a lever that can rotate about a first axis in a frame that is fixed to the door and is connected mechanically to a rocker wheel that rotates in the frame about a second axis when the stop piece belonging to a locking member comprising a pendulum that has lever is pulled in order to unlock the door, the rocker wheel is provided with a shoulder capable of being intercepted by a an inertial mass and is hinged to the frame or to a body integral therewith so as to pivot about a third axis, that during a violent pivoting of the pendulum, the stop piece strikes the shoulder and prevents the rocker wheel from rotating.
1. Handle for a motor vehicle door ( 2 ; 102 ) comprising a lever ( 5 ; 105 ) that can rotate about a first axis ( 7 ; 107 ) in a frame ( 1 ; 101 ) to be fixed to the door ( 2 ; 102 ) and is connected mechanically to a rocker wheel ( 11 ; 111 ) that can rotate in the frame ( 1 ; 101 ) about a second axis ( 12 ; 112 ) when the lever ( 5 ; 105 ) is pulled in order to unlock the door ( 2 ; 102 ), said rocker wheel ( 11 ; 111 ) being provided with a shoulder ( 24 ; 124 ) capable of being intercepted by a stop piece ( 15 ; 130 ) belonging to a locking member comprising a pendulum ( 16 ; 116 ) which is provided with an inertial mass ( 18 ; 118 ) and is hinged to the frame ( 1 ; 101 ) or to a body integral therewith so as to pivot about a third axis ( 17 ; 117 ), in such a way that during a violent pivoting of the pendulum ( 16 ; 116 ) the stop piece ( 15 ; 130 ) strikes the shoulder ( 24 ; 124 ) and prevents the rocker wheel ( 11 ; 111 ) from rotating, wherein said third axis of rotation ( 17 ; 117 ) of the pendulum ( 16 ; 116 ) is essentially parallel to said first axis of rotation ( 7 ; 107 ) of the lever ( 5 ; 105 ), and wherein said inertial mass ( 18 ; 118 ) is located between said first and third axes of rotation ( 7 , 17 ; 107 ; 117 ).
2. Handle according to claim 1 , characterized in that said inertial mass ( 18 ; 118 ) is located close to a center of the frame ( 1 ; 101 ).
3. Handle according to claim 1 , characterized in that a straight line passing through the centres of gravity of the inertial mass ( 18 ; 118 ) and of the lever ( 5 ; 105 ) is essentially perpendicular to the first ( 7 ; 107 ) and third ( 17 ; 117 ) axes of rotation.
4. Handle according to claim 1 , characterized in that this inertial mass ( 18 ; 118 ) is of a flat shape.
5. Handle according to claim 4 , characterized in that this inertial mass ( 18 ; 118 ) is essentially parallel to the first ( 7 ; 107 ) and third ( 17 ; 117 ) axes of rotation.
6. Handle according to claim 1 , characterized in that the first axis of rotation ( 7 ; 107 ) is essentially parallel to the axis of rotation of the door ( 2 ).
7. Handle according to claim 1 , characterized in that the second axis of rotation ( 12 ) is essentially perpendicular to the first ( 7 ) and third ( 17 ) axes of rotation.
8. Handle according to claim 1 , characterized in that the second axis of rotation ( 112 ) is essentially parallel to the first ( 107 ) and third ( 117 ) axes of rotation.
9. Handle according to claim 1 , characterized in that the rocker wheel ( 11 ; 111 ) is provided with a cam surface ( 14 ; 114 ) on which a tappet ( 15 ; 115 ) integral with the pendulum ( 16 ; 116 ) can slide, in such a way that the pendulum pivots when the rocker wheel ( 11 ; 111 ) rotates about the second axis ( 12 ; 112 ).
10. Handle according to claim 9 , characterized in that the shoulder ( 24 ) of the rocker wheel ( 11 ) is located at a distance from the cam surface ( 14 ) that is greater than the height of the tappet ( 15 ) of the pendulum ( 16 ), so that the tappet ( 15 ) passes underneath the shoulder ( 24 ) without touching it if it slides over the cam surface ( 14 ), but strikes it, thus acting as a stop piece and preventing the rocker wheel ( 11 ) from rotating, when it comes off said cam surface.
11. Handle according to claim 9 , characterized in that the shoulder ( 124 ) of the rocker wheel ( 111 ) extends towards a corresponding stop piece ( 130 ) that projects from the pendulum ( 116 ), in such a way that the shoulder ( 124 ) passes close to the stop piece ( 130 ) without touching it if the tappet ( 115 ) slides over the cam surface ( 114 ), but strikes it, thus preventing the rocker wheel ( 111 ) from rotating, when it comes off said cam surface.
12. Handle according to claim 1 , characterized in that elastic means ( 19 ; 119 ) are arranged between the frame ( 1 ; 101 ) and the pendulum ( 16 ; 116 ) in order to press the pendulum ( 16 : 116 ) against the rocker wheel ( 11 ; 111 ).
13. Handle according to claim 1 , characterized in that when the pendulum ( 16 ) pivots about the third axis ( 17 ), it operates a switch ( 21 ) belonging to a control device ( 22 ) housed in a seat formed in the frame ( 1 ).
14. Handle according to claim 13 , characterized in that the inertial mass ( 18 ) of the pendulum ( 16 ) is provided with a shoe ( 20 ) mounted on elastic means in order to press against said switch ( 21 ) of the control device ( 22 ) when the pendulum ( 16 ) pivots about the third axis ( 17 ).
15. Handle according to claim 13 , characterized in that when said switch ( 21 ) is operated, the control device ( 22 ) sends a signal to open the lock of the door ( 2 ) and/or operate other devices, such as the interior lights of the motor vehicle.