Support structure for linear-compressor moving component, linear compressor, and cryogenic refrigerator

A linear-compressor moving component support structure, comprising:

• a moving component partitioning a compressor container of the linear compressor into a high-pressure chamber and a low-pressure chamber for a working gas, the moving component being configured to reciprocate periodically along axially opposite directions, in one of the opposite directions of which the moving component compresses the working gas in the high-pressure chamber;
• a fixed body slidably supporting the moving component axially, and between itself and the moving component forming the high pressure chamber;
• an intake valve disposed in the moving component so as to supply the working gas from the low pressure chamber to the high pressure chamber;
• an outlet valve disposed in the fixed body so as to discharge the working gas from the high pressure chamber;
• a plurality of axially arranged leaf spring parts, each leaf spring part elastically supporting the moving component in the compressor container such as to allow the axially reciprocating movement of the moving component;
• a plurality of axially arranged first auxiliary spring parts each having a first axial rigidity, each first auxiliary spring part being located adjacent to one of opposite sides of a corresponding one of the plurality of leaf spring parts;
• and
• a plurality of axially arranged second auxiliary spring parts each having a second axial rigidity greater than the first axial rigidity, each second auxiliary spring part being located adjacent to the other of the opposite sides of a corresponding leaf spring part.