초록 ▼

A control device is provided for an industrial truck, in particular the towbar of a towbar-guided industrial truck, having a circuit element to generate a multi-stage electrical control signal. The invention teaches that the switching element has at least one contact membrane (6) which can be electr

A control device is provided for an industrial truck, in particular the towbar of a towbar-guided industrial truck, having a circuit element to generate a multi-stage electrical control signal. The invention teaches that the switching element has at least one contact membrane (6) which can be electrically connected by a pressure force exerted on the contact membrane (6) with at least one of a plurality of contact points (2) that correspond to the contact membrane (6). The contact points (2) are connected by electrical resistors (R1-8). The electrical resistors (R1-8) are preferably connected in series, whereby the connecting line between each two resistors is connected to a contact point (2). There are two sliders (8a, b), each of which exerts a pressure force on the contact membrane (6), as a result of which a contact point (2) can be connected to a contact area (3).

대표청구항 ▼

[ We claim:] [1.]1. A control device for controlling a function of an industrial truck, the control device comprising:a circuit element configured to generate a multi-stage electrical control signal for controlling a function of an industrial truck, the circuit element including:a substrate;a plural

[ We claim:] [1.]1. A control device for controlling a function of an industrial truck, the control device comprising:a circuit element configured to generate a multi-stage electrical control signal for controlling a function of an industrial truck, the circuit element including:a substrate;a plurality of spaced contact points located on the substrate;a contact area located on the substrate and spaced from the plurality of contact points;a contact membrane spaced from the substrate and facing the contact points and contact area;a first slider movable over the contact membrane and configured to apply a pressure force to press the contact membrane against at least one contact point;a second slider movable over the contact membrane and configured to apply a pressure force to press the contact membrane against the contact area to electrically connect the at least contact point with the contact area, wherein the contact points are connected by electrical resistors; andmeans for pressing the first and second sliders against the contact membrane such that the magnitude of the pressure force exerted on the contact membrane by the first and second sliders is independent of the position of the sliders on the contact membrane.