| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint boot to improve the sealing performance in a mounting part at a greater diameter side for an outer case. SOLUTION: There is is provided with a mounting part (2) at the greater diameter side, a mounting part (4) at a smaller diameter side (4), and a bellows (5). The outer circumferential surface of the mounting part (2) at the greater diameter is shaped in a circular cross section, and a plurality of protrusions (7) is formed in the inner circumferential surface of the mounting part at the greater diameter side. The plurality of protrusions (7) is rotatably and externally fitted in a plurality of recesses (8) formed in the outer circumferential surface of the outer case, respectively. The bellows (5) is made of a resin material, and the mounting part (2) at the greater diameter side is made of a resin material softer than the bellows (5). A fitted cylinder (6) externally fitted in the mounting part (2) at the greater diameter side is extended to an end (5A) of the bellows (5). An end (61) of the mounting part (2) at the greater diameter side of the bellows (5) side is shaped in a taper cylinder, which is the nearer to the bellows (5) side, the smaller in diameter. COPYRIGHT: (C)2006,JPO&NCIPI
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