Patent ID: 9075426
Filing Date: 2015-07-07
Classification: G05G

Abstract:
1. A human interface device comprising: a substrate; a strain sensitive die coupled to the substrate wherein the die is capable of providing an electrical signal indicative of a force applied to the strain sensitive die; a force transfer element positioned adjacent to the strain sensitive die and coupled to the strain sensitive die; a translation element mechanically coupled to the force transfer element, the translation element configured only to move in a lateral direction; wherein the translation element and the force transfer element are configured to rotate separately about a vertical axis relative to the strain sensitive die; an elastic element at least partially surrounding the translation element and the force transfer element, wherein the elastic element provides the mechanical coupling between the translation element and the force transfer element, the elastic element being physically separate and distinct from the force transfer element; a housing at least partially covering and surrounding the force transfer element; wherein a force applied to the translation element causes stretching of the elastic element; and wherein the stretching of the elastic element causes a force to be applied to the force transfer element; wherein the force applied to the force transfer element by the elastic element is then applied to the strain sensitive die; and wherein the force transfer element is configured to prevent any vertical forces which are applied to the translation element from being transferred to the strain sensitive die and instead be transferred to the substrate.