| 摘要 |
A dumbbell with adjustable weight includes a plurality of weighty disks each having an axial opening and an off-centered track extending partially across the axial opening. A bar has two ends received in the axial openings of the weighty disks and is formed with a plurality of spaced notches defined in each end thereof. The weighty disks are each provided with a positioning member movably connected thereto. Furthermore, each of the weighty disks is formed with a first retainer and the positioning member is formed with a second retainer cooperative with the first retainer for releasably retaining the positioning member in the first position once the positioning member is moved to this position, thereby locking the corresponding one of the weighty disks on the bar.
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