A control device for an electrical window regulator for motor vehicles

摘要

In order to control an electrical window regulator (11), the device (10; 40) comprises two electrical push-button switches (21, 22; 49, 50) for controlling the raising and the lowering of the window, and a control circuit (19; 36; 46) connected to those switches (21, 22; 49, 50) and designed to control the supply of current to the motor (12; 43) in accordance with predetermined methods. Each switch (21, 22; 49, 50) has a main terminal (21a, 22a; 49a, 50a) which is connected to the electric motor (12, 43) and which is connectable selectively to a first terminal (21c, 22c, 49c, 50c) connected to one pole (+) of the voltage source (14) and, respectively, to a second terminal (21b, 22b; 49b, 50b) in the actuated state and, respectively, in the resting state of the switch (21, 22; 49, 50). The control circuit comprises two controlled switches (23, 24; 54, 55) which are associated with the push-button switches (21, 49; 22, 50) and each of which has a main terminal (23a, 24a; 54a, 55a) which is connected to the second terminal (21b, 49b; 22b, 50b) of the associated push-button switch (21, 49; 22, 50) and which is connectable selectively to one pole (+) and, respectively, to the other pole (-) of the voltage source (14) in an energised state and, respectively, in the de-energised state of the controlled switch (23, 24; 54, 55). Sensor devices (R1, R2; R; R3, R4) detect the passage of current into the motor (12; 43). After the passage of current into the motor (12; 43) owing to the operation of a push-button switch (21, 22; 49, 50), a control circuit (27; 37; 56), which is connected to the sensor devices (R1, R2; R; R3, R4), energises the controlled switch (24, 23; 55, 54) associated with the other push-button switch (22, 21; 50, 49) so that the motor (12) remains connected to the two poles (+, -) of the voltage source (14) even after the operated push-button switch (21, 22; 49, 50) has been released.