Fastening assembly, connecting strap assembly, and wearable device

A wearable device comprising:

• a first connecting strap comprising a first end;
• a second connecting strap comprising a second end;
• a main part coupled to the first end and the second end;
• and
• a fastening assembly coupled to the second connecting strap, located away from the main part, and comprising:
• a rotating shaft;
• a base comprising:
• a first surface, wherein the first surface comprises a first snap-fit part, and wherein the first snap-fit part is a locking protrusion or a locking groove;
• and
• a second surface comprising a press-fit protrusion configured to press the first connecting strap in a passage;
• a pressing plate rotatively coupled to the base by the rotating shaft and comprising a third surface comprising a second snap-fit part and facing the first surface of the base, wherein the second snap-fit part is the locking protrusion when the first snap-fit part is the locking groove, wherein the second snap-fit part is the locking groove when the first snap-fit part is the locking protrusion, wherein the locking protrusion and the locking groove fit into each other to form a snap-fit connection, and wherein the pressing plate and the base are enclosed to form the passage;
• and
• a cover plate coupled to the base and configured to fasten the second connecting strap between the cover plate and the base.

A watch strap comprising:

• a first connecting strap;
• a second connecting strap comprising through holes;
• and
• a fastening assembly coupled to the second connecting strap and comprising:
• a rotating shaft;
• a base comprising:
• a first surface, wherein the first surface comprises a first snap-fit part, and wherein the first snap-fit part is a locking protrusion or a locking groove;
• and
• a second surface comprising a press-fit protrusion configured to press the first connecting strap in a passage;
• a pressing plate rotatively coupled to the base by the rotating shaft and comprising:
• a first lateral part, a middle part, and a second lateral part that are sequentially connected, wherein the rotating shaft passes through the first lateral part, the base, and the second lateral part, and wherein both the first lateral part and the second lateral part each are rotatively coupled to the base using the rotating shaft;
• and
• a third surface comprising a second snap-fit part and facing the first surface of the base, wherein the second snap-fit part is the locking protrusion when the first snap-fit part is the locking groove, wherein the second snap-fit part is the locking groove when the first snap-fit part is the locking protrusion, wherein the locking protrusion and the locking groove fit into each other to form a snap-fit connection, and wherein the pressing plate and the base are enclosed to form the passage;
• a cover plate located on a side that is of the base and that is away from the middle part, wherein the cover plate comprises connecting holes;
• a connecting column comprising a screw hole;
• a screwed fitting passing through the connecting holes, connected to the screw hole, and configured to fasten the second connecting strap between the cover plate and the base;
• and
• a locating column located on the side of the base, wherein the connecting column and the locating column pass through the through holes.