Smartwatch with detachable case and clutch crown mechanism

A smartwatch comprising:

• an internal mechanism case comprising an outer side;
• a guide rod disposed on the internal mechanism case;
• a case detachably coupled to the outer side, wherein the case comprises a through hole opposite the guide rod;
• a crown tube fastened to the case and comprising an inner cavity coaxially disposed in the through hole;
• a limiting structure disposed on the crown tube and configured to limit a position of a stem when the stem moves in an axial direction away from the guide rod to prevent the stem from being separated from the crown tube;
• and
• a crown comprising:
• the stem, wherein at least a part of the stem extends through the through hole and through the inner cavity, and wherein the stem comprises a first end adjacent to the guide rod and comprises a second end;
• a knob located on the second end;
• and
• a spring structure located between the crown tube and the stem, wherein the spring structure comprises an annular spring comprising:
• an annular support part;
• and
• an opening part disposed on the annular support part and comprising a plurality of annularly arranged elastic parts, wherein any two adjacent elastic parts are spaced from each other, and wherein a middle part of each of the annularly arranged elastic parts is bent in a direction toward the stem, wherein the stem is configured to:
• move in the axial direction and approach the guide rod when the knob is subject to pressure;
• move in the axial direction and away from the guide rod when the knob is subject to a pulling force;
• and
• rotate and drive the guide rod to rotate when the knob is subject to a rotation force,
• wherein the annular support part comprises a first side located distal from the guide rod, and wherein the opening part is located on the first side.

A smartwatch comprising:

• an internal mechanism case comprising an outer side;
• a guide rod disposed on the internal mechanism case;
• a case detachably coupled to the outer side, wherein the case comprises a through hole opposite the guide rod;
• a crown tube fastened to the case and comprising an inner cavity coaxially disposed in the through hole;
• a limiting structure disposed on the crown tube and configured to limit a position of a stem when the stem moves in an axial direction away from the guide rod to prevent the stem from being separated from the crown tube;
• and
• a crown comprising:
• the stem, wherein at least a part of the stem extends through the through hole and through the inner cavity, and wherein the stem comprises a first end adjacent to the guide rod and comprises a second end;
• a knob located on the second end;
• and
• a spring structure located between the crown tube and the stem, wherein the spring structure comprises an annular spring comprising:
• an annular support part;
• and
• an opening part disposed on the annular support part and comprising a plurality of annularly arranged elastic parts, wherein any two adjacent elastic parts are spaced from each other, and wherein a middle part of each of the annularly arranged elastic parts is bent in a direction toward the stem, wherein the stem is configured to:
• move in the axial direction and approach the guide rod when the knob is subject to pressure;
• move in the axial direction and away from the guide rod when the knob is subject to a pulling force;
• and
• rotate and drive the guide rod to rotate when the knob is subject to a rotation force,
• wherein the limiting structure comprises a second side located distal from the guide rod, and wherein the spring structure is located on the second side.