| 摘要 |
PURPOSE: A piston is provided to reduce the manufacturing cost by reducing use of high-priced materials having abrasion resistance and heat resistance. CONSTITUTION: A piston includes a piston body(20) housed inside a cylinder(4), a suction compression unit(30), and a drive guide unit(40). The piston body forms a gas passage guiding flow of gas. One side of the suction compression unit is communicated with the gas passage of the piston body, forming a suction hole performing suction into the cylinder. The other side of the suction compression unit is coupled with the piston body, performing compression. The drive guide unit is coupled with the piston body, to be separated with the suction compression unit, guiding rectilinear reciprocation of the piston body inside the cylinder. The drive guide unit is formed into a ring shape. At least one of the suction compression unit and the drive guide unit is coupled with the piston body through junction.
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