| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost joint eliminated from projecting from a panel and from determining the directivity of the panel when fitted to the panel. SOLUTION: This joint is provided with an outer cylindrical member 9, an intermediate cylindrical member 12 to be inserted in the outer cylindrical member 9, and a seal member 11 provided between the outer cylindrical member 9 and the intermediate cylindrical member 12. This joint is characterized in that a pair of outer cylindrical members 9 are opposed to each other, one outer cylindrical member 9 and the other outer cylindrical member 9 are communicated with each other via the intermediate cylindrical member 12, and the outer cylindrical member 9 and the intermediate cylindrical member 12 can be axially and relatively moved while retaining the sealed state of the interval between the outer cylindrical member 9 and the intermediate cylindrical member 12. |
