Load cell with roberval structure having anti-offset function, and weighing device

A load cell with a Roberval structure having an anti-offset function, the load cell comprising:

• an elastic element for bearing a load;
• and
• a plurality of strain detection elements mounted on the elastic element and configured to detect deformation of the elastic element;
• wherein the elastic element comprises a loading portion configured to receive the load from a connector, a fixing portion configured to fix the elastic element, a strain generation portion configured to convert the load into deformation, and a parallel guide beam configured to transfer the load and to keep the loading portion translational when the load cell is loaded;
• wherein the loading portion and the fixing portion are respectively located on left and right sides of the strain generation portion, and the parallel guide beam is located at upper and lower portions of the strain generation portion;
• wherein the strain generation portion comprises a first hollow cavity body and a second hollow cavity body that are symmetrically distributed vertically relative to each other;
• wherein the plurality of strain detection elements includes at least one strain detection element disposed inside the first hollow cavity body and at least one strain detection element disposed inside the second hollow cavity body, the strain detection elements inside the first and second hollow cavity bodies corresponding to each other in a vertical direction;
• and
• wherein a center of rotation of the elastic element and a geometric center of the strain generation portion coincide when the load cell is loaded.