| 摘要 |
A spanner has a handle, a head frame connected to the handle, a drive head device, a pair of reinforced plates, and a pair of arm plates. The head frame has a pair of parallel panels, and a spacing formed between the parallel panels. Each parallel panel has a first pivot hole, a second pivot hole, and a third pivot hole. The reinforced plates and the arm plates are inserted in the spacing of the head frame. Each arm plate has a square hole and a round hole. Each reinforced plate has a round aperture and a circular aperture. The drive head device has a round head. The round head of the drive head device passes through the first pivot hole of each panel and the square hole of each arm plate. A gasket is disposed on one of the panels. A bolt passes through the gasket to be engaged with the round head of the drive head device. A first pin fastens each panel, each reinforced plate, and each arm plate pivotally. A second pin fastens each panel and each reinforced plate pivotally.
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