The study on micro swimmers is a growing interest in research now. The motion or mobility of an object at microscopic world is different and difficult to understand when compared to macroscopic world. In this research paper, the study about the micro swimmers which are simply called as swimmers is considered. In general, the basic form of a swimmer was introduced as 3-sphere model and is to be usually found a wide use in theoretical, numerical and experimental research. In this paper, it has been modified and extended the helical spring model in various ways that allows gaining knowledge, insight into many general principles of micro swimmers by introducing 3 kinds of helical spring swimmer models and analyzing several parameters of them gives us an optimal design. The present research paper consists of both numerical study for the equation of motion and corresponding analytical investigation and find the values of various parameters like deformations, velocities etc. for each individual swimmer. By analyzing those results it had been framed out the optimal design of a helical spring micro swimmer.