Ferrule assembly and fiber optic fast connector comprising the same

A ferrule assembly, characterized by comprising:

• a tailstock, provided with a window portion in which a supporting platform is provided, and having one end provided with an opening;
• a ferrule, provided inside with a receiving cavity for receiving an optical fiber, wherein the ferrule has one end passing through the opening and, in conjunction with the supporting platform, constituting a stepped portion, and provided with a groove portion, which corresponds to the window portion;
• wherein the ferrule has another end located outside of the tailstock, and the receiving cavity extends through the one end and the other end of the ferrule and is exposed on the groove portion;
• a pressing block;
• a lock catch, slidably sleeved on the tailstock;
• wherein the pressing block comprises a pressing portion, a flexible portion, and an end handle portion, the flexible portion connects with the pressing portion and the end handle portion, respectively;
• the pressing portion abuts against and connects with the groove portion, and the end handle portion abuts against and connects with the stepped portion;
• wherein a maximum thickness H3 of the pressing portion is greater than a thickness H1 of the flexible portion and a thickness H2 of the end handle portion, respectively, and the thickness H2 of the end handle portion is greater than the thickness H1 of the flexible portion;
• wherein a vertical distance S1 from a bottom surface of the end handle portion to a bottom surface of the pressing portion is less than a maximum vertical distance S2 from a top surface of the stepped portion to a bottom surface of the groove portion;
• wherein S1 and S2 satisfy a condition of:
• 0.02
• mm
• ≤
• S
• 2
• -
• S
• 1
• ;
• and
• H1 and H3 satisfy conditions of:
• 2.7
• ≤
• H
• 3
• H
• 1
• ≤
• 10
• ;
• and
• 0.2
• mm
• ≤
• H
• 1
• ≤
• 0.7
• mm
• ;
• wherein in response to that the ferrule assembly is in an unlocking state, the lock catch is located at a position corresponding to the end handle portion, and there is spare space between a lower surface of the pressing portion and a bottom surface of the groove portion;
• wherein a height H4 of the spare space≤a height difference S3 between an upper surface of the pressing portion and an upper surface of the flexible portion.