| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection structure, although a weld not only breaks a beautiful appearance as a product but also causes qualitative disadvantage, although, in an applicator needing airtight, for example, there arises a problem such as air leakage by the weld or the occurrence of timely crack due to the weld which has occurred at a stress-liable portion such as a screw part or a fitted part.SOLUTION: A shaft-shaft connection structure comprises: a thick wall part in at least one barrel; and a thin wall part on at least one side of the thick wall part. A gate is disposed at the thick wall part, and another shaft is connected to the thin wall part.SELECTED DRAWING: Figure 4 |
