Abstract: Bands for wearable devices include multiple band retainers used to maintain engagement between an assembly (e.g., a pair) of bands. Some band retainers may be permanently affixed with the band at a certain location of the band, while other band retainers can be removable. The removable band retainers can be moved to different locations of the band, thus allowing the band retainer to retain another band at different locations. As a result, the assembly of bands can be used with different users, and in particular, users with different wrist sizes. Moreover, using multiple band retainers can provide an engagement force between the bands to withstand higher-impact events, such as swimming and diving. Additionally, bands and band retainers may include one or more liquid-resistant and corrosion-resistant materials.

Abstract: A hinge mechanism includes a base gudgeon and a pivot pintle. The base gudgeon has a main body and first and second tubular portions formed on the main body and respectively having coaxial first and second pivot holes. The second tubular portion has a first torque regulating formation formed on an inner surrounding wall thereof. The pivot pintle has a first pintle section rotatably inserted into and pressed-fit to the first pivot hole to produce primary frictional torque during pivoting of the pivot pintle, a second pintle section rotatably inserted into and pressed-fit to the second pivot hole to produce secondary frictional torque, and a second torque regulating formation configured to be matingly engaged with the first torque regulating formation in a part of angular positions of the pivot pintle so as to reduce the secondary frictional torque.