Patent ID: 6986293
Filing Date: 2006-01-17
Classification: B60N,B60R,G01G,G01L

Abstract:
1. A force measuring device for seat weight determination in a motor vehicle, comprising: a taking up element having at least two bearing points spaced from one another and arranged so that one of the bearing points is loadable with a force to be measured perpendicularly relative to a longitudinal axis of said taking up element, wherein the taking up element has opposite sides, wherein said opposite sides have end portions having a diameter that is smaller than a diameter of a central portion, wherein the taking up element is inserted with a first one of said end portions into an opening of a seat rail which serves as a stationary bearing; a lever arranged displaceably and fixably on a second one of said end portions of the taking up element; means forming a first recess in the taking up element in a region between at least two bearing points; a rod-shaped element which extends in the longitudinal axis of said taking up element and is not loaded by bending forces, said rod-shaped element having a free end which deviates from said longitudinal axis of said taking up element when a force to be measured acts on said taking up element; and a measuring unit for detecting the deviation of the free end of the rod-shaped element, said measuring unit having a magnet and a magnetic field-sensitive sensor, said magnet and said magnetic field-sensitive sensor being arranged immovably relative to one another and said magnet is arranged close at a distance to a ferromagnetic material so that the distance from the magnet to a ferromagnetic material changes under a loading with the force to be measured, and wherein said taking up element is composed of a ferromagnetic material and has a second opening formed as a blind hole, said magnet being introduced into said blind hole with a small plate.