Abstract: The present disclosure relates to the technical field of cutting machining, and discloses a cross-scale structure feature surface machining method based on a multi-component collaborative vibration. A vibration in a z-axis direction is applied to a servo movement mechanism to realize the cutting of a micron-scale structure and the adjustment of the cutting depth; and the vibration in the z-axis direction is applied to a three-axis movement platform to realize the cutting of a millimeter-scale structure and the adjustment of the cutting depth. A required cross-scale structure feature surface can be machined and formed at one time through a collaborative vibration among a vibrating tool, a servo movement mechanism, and/or a three-axis movement platform according to the structure type contained in the required cross-scale structure, which can simplify a process flow and improve the machining efficiency, and has high economic efficiency.

Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell disposed to a bottom surface of the upper shell, a protective mechanism and a circuit board assembly disposed between the upper shell and the lower shell. The protective mechanism includes a front cover, a rear cover covered to a rear of the front cover, two rollers disposed along an up-down direction, two springs, two supporting structures and a plurality of sealing structures. The two springs elastically abut between an inner surface of a top wall of the front cover and one roller along a vertical direction. The two supporting structures are mounted around two opposite sides of the one roller, and two opposite sides of the other roller. The plurality of the sealing structures are disposed at two outer surfaces of the two supporting structures.

Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell, a protective mechanism and a circuit board assembly. An upper portion of a front end of the upper shell slantwise extends downward and rearward, and then is bent rearward to form an upper extending portion. A lower portion of the front end of the upper shell extends rearward to form a lower extending portion. The upper extending portion is spaced from the lower extending portion to form an inserting passageway between the upper extending portion and the lower extending portion. The lower shell is mounted to a bottom surface of the upper shell. The protective mechanism is disposed between the upper shell and the lower shell. The circuit board assembly is disposed between the upper shell and the lower shell.

Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell disposed to a bottom surface of the upper shell, a protective mechanism and a circuit board assembly disposed between the upper shell and the lower shell. The protective mechanism includes a front cover, a rear cover covered to a rear of the front cover, two rollers disposed along an up-down direction, two springs, two supporting structures and a plurality of sealing structures. The two springs elastically abut between an inner surface of a top wall of the front cover and one roller along a vertical direction. The two supporting structures are mounted around two opposite sides of the one roller, and two opposite sides of the other roller. The plurality of the sealing structures are disposed at two outer surfaces of the two supporting structures.