Controller for a seatbelt positioning device and seatbelt positioning device

摘要

A control (18) for a seat belt positioning device (10) includes a motor (12) for positioning a seat belt component (16). A locking tongue sensor (20) generates a locking tongue signal (S) depending on whether a locking tongue is inserted in a belt buckle (16). A trigger circuit (22) connected to the locking tongue sensor (20) generates a trigger signal (TR, TR1, TR2, VT, TM) in response to the locking tongue signal (S) A timer (32) or a motor load circuit (33) connected to the trigger circuit (22) generates a motor signal (M) having a predetermined period or depending on a motor load in response to the trigger signal (TR, TR1, TR2, VT, TM). A motor control circuit (34) connected to the timer (32) and the trigger circuit (22) turns the motor on and off in response to the motor signal (M). The direction of motion of the motor (12) is selected depending on the trigger signal (TR, TR1, TR2, VT, TM).

主权项

1. A control (18) for a seat belt positioning device (10) comprising a motor (12) for positioning a seat belt component (16) comprising:
a locking tongue sensor (20) generating a locking tongue signal (S) depending on whether a locking tongue is inserted in a belt buckle (16); a trigger circuit (22) which is connected to the locking tongue sensor (20) and generates a trigger signal (TR, TR1, TR2, VT, TM) in response to the locking tongue signal; a timer (32) which is connected to the trigger circuit (22) and generates a motor signal (M) for a predetermined period of time (MZ) in response to the trigger signal (TR, TR1, TR2, VT, TM); a motor control circuit (34) connected to the timer (32) and the trigger circuit (22) and turning the motor (12) on in response to the motor signal (M) and off at the end of the predetermined period of time (MZ) wherein the direction of motion of the motor (12) is selected from a first direction to position the seat belt component in a fastening position and a second direction to position the seat belt component in a retaining position depending on the trigger signal (TR, TR1, TR2, VT, TM); and wherein the trigger circuit (22) has a first trigger stage (24) generating a basic trigger signal (TR) which is correlated in time with the locking tongue signal (S), the trigger circuit (22) having a second trigger stage (26) connected to the first trigger stage (24) and generating a first auxiliary trigger signal (TR1) in response to a positive edge in the basic trigger signal (TR) and a second auxiliary trigger signal (TR2) in response to a negative edge in the basic trigger signal (TR).