Wrist-worn electronic device and wearable device

A wearable device, comprising a body and a strap, wherein the body comprises a middle frame, a rear cover, a latch, and a button that are independent of each other in structure, and wherein:

• an inner cavity is formed in the middle frame;
• the rear cover covers, along a first direction, the middle frame, the rear cover comprises a first through hole extending along the first direction, and the first through hole connects with the inner cavity of the middle frame;
• the latch is disposed in the inner cavity of the middle frame, and is configured to move, along the first direction relative to the middle frame, between a first position and a second position, wherein when the latch is located in the first position, at least one end of the strap is latched to the body, or when the latch is located in the second position, at least one end of the strap is released from the body;
• and
• the button extends through the first through hole and abuts, along the first direction, against the latch, wherein the button is used to provide, when being pressed, the latch with a push force for moving from the first position to the second position.