| 摘要 |
A slide rail and a rail support are integrally formed from a high-strength first polymer resin. A wear-resistant second polymer resin, applied to the slide rail and rail support in the process of sandwich molding, entirely covers the slide rail and rail support, including the inner circumferential surface of a pivoting hole in the rail support, and an engine block-engaging seating surface of a boss surrounding the pivoting hole. The tensioner lever exhibits excellent mechanical strength and wear resistance, low weight and reduced production cost, and can be recycled easily. The covering of wear-resistant polymer particularly prevents wear on the inner circumferential surface of the pivoting hole and the seating surface of the boss.
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