| 摘要 |
<p>A resistive position indicator, particularly for motorized height adjusters for the pillar loop in vehicle safety belts, comprises an elongated resistive element (11) having an electrical terminal (12, 13) at each end and a tap means (14) which can be brought into contact with the resistive element (11). The contact point divides the resistive element into two portions and is movable along the resistive element, so that the resistance ratio between the two portions of the resistive element can be varied within wide limits. The resistive element consists of a layer (11) of resistive material applied on a substrate (10B) of electrically insulating material. The tap means (14) comprises an elongated contact portion (14A) of electrically conducting material applied on a substrate (10C) and positioned in front of, parallel to and slightly spaced from the resistive element, so that an air gap is formed between the resistive element (11) and the contact portion (14A) of the tap means. At least one substrate (10B, 10C) consists of a flexible foil, so that the air gap between the resistive element (11) and the contact portion (14A) of the tap means can be eliminated at any point along the resistive element by means of a compressive force on the flexible foil, so that the contact portion (14A) of the tap means is brought into contact with the resistive layer (11) at that point. The substrates can preferably consist of a continuous strip (10) of flexible foil which is folded and provided with an insert (15) of insulating material having a slot (16). The design gives a position indicator having a low friction , a low weight and a small required space.</p> |
