Detachable link for watch bands and detachable watch band

A detachable link for watch bands, comprising:

• an I-piece (210), comprising a first beam (211), a second beam (212) and a third beam (213) connecting the first beam (211) and the second beam (212), and the first beam (211), the second beam (212) and the third beam (213) forming a first recess (214) and a second recess (215) at both sides of the third beam (213), wherein the first recess (214) is configured to receive a middle link of an adjacent detachable link, an inner wall of the first recess (214) is provided with a spring bar hole (216) and a chute (217);
• a middle link (220), having a first spring bar passage (221) and a second spring bar passage (222) extending through the middle link (220), wherein the second recess (215) is configured to receive the middle link (220) of the detachable link;
• spring bars (230), disposed in the first spring bar passage (221) and the second spring bar passage (222) and elastically stretchable along a length direction thereof;
• and
• a key (240), wherein the key is slidably disposed in a key slot (218) defined in the first beam (211) and the second beam (212) respectively and the key is configured to quickly release a connection between the I-piece (210) and the middle link of the adjacent detachable link.