| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston head structure of a drive compressor in a refrigerator capable of extending service lives of a stirling refrigerator and other refrigerators by facilitating adjusting work between a cylinder 6 and a piston 7, bringing an interval between the cylinder and the piston close to a non-contact seal being an ideal state, reducing required values of parts accuracy and assembly accuracy, and reducing the number of parts whose sizes are to be controlled. SOLUTION: In the case that the piston head 8 part of the piston 7 is divided into a piston rod 41 and a piston cover 42, the piston head 8 of the piston 7 is divided into the piston rod 41 extending in a reciprocating motion direction and the piston cover 42 positioned between the piston rod 41 and the cylinder 6 and stored in the cylinder 6, so that the positions of the piston cover 42 and piston rod 41 can be mutually adjusted. COPYRIGHT: (C)2004,JPO
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