| 摘要 |
PURPOSE: A tire tube is provided to prevent the damage of a tube without installing an additional flap(4) for preventing the damage of the tube. CONSTITUTION: As a tube has stronger stiffness than other pars since the thickness of an adjacent rubber of a valve base(21) contacted with a salt hole(30) formed on a rim, air is injected into the tube(2) so that the part of the valve base(21) is not pushed through the salt hole(30) even if the tube is inflated. An assembly work can be conveniently accomplished when the tire is installed on the rim since the tube itself performs the function of the flap. In addition, a producing cost is saved since an additional flap is not produced.
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