Device for detecting thickness and thickness variation of a sheetlike object

A device for detecting thickness and thickness variation of a sheetlike object, comprises:

• a first guiding component and a plurality of second guiding components, wherein the second guiding components are opposite to the first guiding component, and the second guiding components are arranged in line, a displacement occurs between the first guiding component and the second guiding components while the sheetlike object passes through the first guiding component and the second guiding components, due to the thickness variation of the sheetlike object;
• a plurality of detection units relatively arranged to the second guiding components, each detection unit includes:
• a detecting block connected with one of the second guiding components, when the second guiding component occurs the displacement, the corresponding detecting block also occurs the displacement;
• a first elastic member comprising a first displacement end, wherein the first displacement end comprises a sensing face to be detected;
• a second elastic member comprising a second displacement end, wherein both of the first displacement end and the second displacement end have a plane disposed thereto and connected with each side of the detecting block, so as to keep the shape of the first displacement end and the second displacement end;
• and
• a fixing member for fixing another side of the first displacement end of the first elastic member and another side of the second displacement end of the second elastic member;
• and
• a position sensor configured at a fixed position to detect a displacement of the sensing face, when the displacement occurs on any one of the second guiding components, the relative first displacement end and the relative second displacement end also occur the displacement, and the sensing face has a parallel displacement relative to the position sensor.