Safety device for electrical openers for a vehicle
First Claim
1. In a safety device for vehicular electrical openers having an electrical motor with an electrical supply circuit, said electrical motor controlled by a switch forming part of said electrical supply for said motor, a movable member driven by a cable, a kinematic chain for driving said cable, and electromechanical coupling and load-detecting means for coupling and detecting a load between a driving element of said kinematic chain and a driven element of said kinematic chain, said driven element fixed to said movable member, said coupling and detecting means effective to automatically uncouple said driving and driven elements from each other in the event said load exceeds a predetermined value, the improvement comprising:
- a driving slide fixedly attached to said cable, a driven slide fixedly attached to said movable member, said electromechanical coupling and load-detecting means provided between said driving slide and said driven slide and being arranged so as to automatically uncouple said driving slide and said driven slide from each other in the event said load exceeds said predetermined value.
1 Assignment
0 Petitions
Accused Products
Abstract
In a window lifter of the cable type, comprising a motor for driving the cable bearing a slide (6) linked to a second slide (7) supporting the window, the two slides (6, 7) may be coupled via an elastic tension element (16) and one (6) of the slides is fitted with an electrical switch (17), associated with the second slide (7) so as to change state when the load on the slide (7) carrying the window (8) exceeds a predetermined value and when the elastic element (16) undergoes an extension corresponding to the separation between the slides; the switch (17) forms part of an electrical supply circuit for the motor, capable of reversing its direction of rotation when this switch (17) changes state, so as to free the movable member from an obstacle in its path. This electromechanical safety device has a simple structure and a low manufacturing cost.
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Citations
14 Claims
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1. In a safety device for vehicular electrical openers having an electrical motor with an electrical supply circuit, said electrical motor controlled by a switch forming part of said electrical supply for said motor, a movable member driven by a cable, a kinematic chain for driving said cable, and electromechanical coupling and load-detecting means for coupling and detecting a load between a driving element of said kinematic chain and a driven element of said kinematic chain, said driven element fixed to said movable member, said coupling and detecting means effective to automatically uncouple said driving and driven elements from each other in the event said load exceeds a predetermined value, the improvement comprising:
- a driving slide fixedly attached to said cable, a driven slide fixedly attached to said movable member, said electromechanical coupling and load-detecting means provided between said driving slide and said driven slide and being arranged so as to automatically uncouple said driving slide and said driven slide from each other in the event said load exceeds said predetermined value.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a safety device for vehicular window openers comprising a kinematic chain provided with a geared motor unit having an input gear and an output gear, an electrical motor gearingly driving the input gear of said geared motor unit, an electrical supply circuit providing electric power to the motor and an electrical switch forming part of the electrical supply circuit of said motor, a toothed sector forming a driving element in engagement with said output gear of said geared motor unit, a swing arm forming a driven element, said swing arm mechanically linked to said toothed sector and carrying a window, and electromechanical coupling and load-detecting means for electromechanically coupling and detecting a load between said toothed sector and said swing arm, said coupling and load-detecting means adapted to uncouple said toothed sector and swing arm from each other in the event said load exceeds a predetermined value, the improvement comprising:
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a) a magnet fixed to one of said toothed sector or said swing arm; b) a ferromagnetic plate carried by the other of said swing arm or toothed sector against which said magnet normally attaches due to an attractive force provided by said magnet coupling said toothed sector and said swing arm; c) said electrical switch mounted on one of said toothed sector or said swing arm and associated with the other of said swing arm or toothed sector so as to change state when said toothed sector and said swing arm are uncoupled by a load exceeding said attractive force provided by said magnet; and d) wherein the direction of rotation of said electrical motor reverses when said switch changes state. - View Dependent Claims (11)
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12. In a safety device for vehicular window openers comprising a kinematic chain provided with a geared motor unit having an input gear and an output gear, an electrical motor gearingly driving the input gear of said geared motor unit, an electrical supply circuit providing electric power to the motor and an electrical switch forming part of the electrical supply circuit of said motor, a toothed sector forming a driving element in engagement with said output gear of said geared motor unit, a swing arm forming a driven element, said swing arm mechanically linked to said toothed sector and carrying a window, and electromechanical coupling and load-detecting means for electromechanically coupling and detecting a load between said toothed sector and said swing arm, said coupling and load-detecting means adapted to uncouple said toothed sector and swing arm from each other in the event said load exceeds a predetermined value, the improvement comprising:
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a) a prestressed elastic tension element connecting said toothed sector and said swing arm, said prestressed elastic tension element undergoing an extension separating said toothed sector and said swing arm in response to said load; b) one of said toothed sector or said swing arm equipped with a component member pivoted to said one of said toothed sector or said swing arm; c) a spring having a return force which urges said component member against said electrical switch towards a first state of said switch; d) a finger member fitted to the other of said toothed sector or said swing arm; e) said finger member interacting with said component member so as to keep said component member in an angular position corresponding to a second state of said switch against the return force of said spring so long as said prestressed elastic tension element does not undergo an extension greater than that corresponding to an extension caused by said predetermined force; and f) wherein the direction of rotation of said electrical motor reverses when said switch changes state.
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13. In a safety device for vehicular window openers comprising a kinematic chain provided with a geared motor unit having an input gear and an output gear, an electrical motor gearingly driving the input gear of said geared motor unit, an electrical supply circuit providing a electric power to the motor and an electrical switch forming part of the electrical supply circuit of said motor, a toothed sector forming a driving element in engagement with said output gear of said geared motor unit, a swing arm forming a driven element, said swing arm mechanically linked to said toothed sector and carrying a window, and electromechanical coupling and load-detecting means for electromechanically coupling and detecting a load between said toothed sector and said swing arm, said coupling and load-detecting means adapted to uncouple said toothed sector and swing arm from each other in the event said load exceeds a predetermined value, the improvement comprising:
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a) an elastic tension element connecting said swing arm and said toothed sector, said elastic element being prestressed and undergoing an extension separating said toothed sector and said swing arm from each other in response to said load; b) a magnet carried by one of said swing arm or toothed sector which can move between a first stable position and a second stable position and associated with said switch such that said switch changes state when said magnet changes from one stable position to the other; c) said first stable position being one in which said toothed sector and said swing arm are coupled and said second stable position of said magnet being one in which said toothed sector and said swing arm are uncoupled by extension of said prestressed elastic tension element exceeding the extension caused by a load of said predetermined value; and d) wherein the direction of rotation of said electrical motor reverses when said switch changes state. - View Dependent Claims (14)
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Specification