Patent ID: 8849086

Claim:
An optical fiber attenuator comprising: a connector unit including: a shell member having: a first shell part, a second shell part extending from and forming a unitary body with the first shell part, being reduced in cross-section with respect to the first shell part, and cooperating with the first shell part to define a through hole, and at least one first engagement part formed on the shell member, and a resilient portion disposed outwardly of the shell member, and being connected to and extending inclinedly and outwardly away from the second shell part and towards the first shell part; an insert component including: an insert body disposed in the through hole of the shell member, a trench formed in the insert body and in spatial communication with the through hole of the shell member, and at least one second engaging part formed on the insert body and capable of engaging with the at least one first engaging part; and an attenuation unit disposed in the through hole of the shell member, and having one end inserted into the trench of the insert component and another end inserted into the second shell part of the shell member, wherein the through hole of the connector unit has a large-diameter hole portion formed in the first shell part, and a small-diameter hole portion formed in the second shell part and having a diameter smaller than that of the large-diameter hole portion, the shell member further having a shoulder portion at a junction of the large-diameter hole portion and the small-diameter hole portion, wherein the small-diameter hole portion includes a first segment adjacent to and in spatial communication with the large-diameter hole portion, a second segment adjacent to and in spatial communication with the first segment, disposed opposite to the large-diameter hole portion and having a diameter that is gradually reduced in a direction away from the large-diameter hole portion, and a third segment adjacent to and in spatial communication with the second segment, disposed opposite to the first segment and having a diameter greater than that of the second segment, and wherein the attenuation unit includes a pin base disposed in the first and second segments, a first pin extending from the pin base and extending through the third segment, and a second pin extending from the pin base in a direction opposite to the first pin, the pin base abutting against the second shell part at the second segment, each of the first pin and the second pin to be mounted with an attenuation fiber therein.