| 摘要 |
PURPOSE:To improve assembling efficiency and prevent a coil spring from dropping by fitting a valve housing with the coil spring built in a cylindrical recess of a mountain cap in a close contact and strongly coupling the housing to the mountain cap against elastic force of the coil spring. CONSTITUTION:A stem rubber 3, a valve stem 5 having a coil spring 4 and a valve housing 6 connected via the coil spring 4 are fitted in a close contact into a cylindrical recess 2 of a mountain cap 1, and the valve housing 6 is strongly coupled to the mountain cap 1 against elastic force of the coil spring which has been housed into a recessed space 7 of the valve housing 6. Thus the valve housing 6 can first be tightly fitted into the cylindrical recess of the mountain cap 1 with a conventional assembly process omitted, so that the valve housing 6 cannot escape against the accumulated elastic force of the coil spring 4 in the housing 6. |
