| 摘要 |
PURPOSE: An inner tube of a tire having a protecting unit against sharp materials is provided to protect an air chamber and a metal wheel frame against sharp articles with a breaker member and a side bumper member. CONSTITUTION: An inner tube of a tire in a vehicle is composed of an expanding tube(10) having plural air balls, an air chamber(103), bent grooves(101) arranged spirally in both sidewalls and plural insertion slots(102) arranged spirally around bent grooves; plural breaker members(30) installed in the insertion slots; and plural side bumper members(20) mounted in the bent grooves. The breaker members consist of a flexible pad having plural air balls, and a breaker attached to the pad. The side bumper member has a flexible air pad with air balls, and a breaker stuck to the pad. The inner tube of the tire is protected against sharp articles with the breaker member and the side bumper member.
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