A fastening mechanism , the fastening mechanism being configured to connect a first member to a second member wherein the fastening mechanism comprises: a clamp member having an enclosure for enclosing the first member, and engagement sheets extending from two side edges of the enclosure, each of the engagement sheets are provided with a first engagement portion, and each of the engagement sheets of the clamp member includes a first portion extending from the side edge of the enclosure, wherein a pair of the first portions of the engagement sheets respectively extend from the side edges of the enclosure and are gradually close to each other, and a second portion extends from each first portion, wherein a pair of second portions extending from the first portions are parallel to each other; a locking member having slots , the engagement sheets of the clamp member being configured to be able to be inserted through the slots , wherein the first portion is configured to be inserted into the slot of the locking member , and the first engagement portion is arranged on the second portion ; and an actuating and tensioning means comprising: a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets , and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member , characterized in that the locking member has a flared portion , the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet. a clamp member having an enclosure for enclosing the first member, and engagement sheets extending from two side edges of the enclosure, each of the engagement sheets are provided with a first engagement portion, and each of the engagement sheets of the clamp member includes a first portion extending from the side edge of the enclosure, wherein a pair of the first portions of the engagement sheets respectively extend from the side edges of the enclosure and are gradually close to each other, and a second portion extends from each first portion, wherein a pair of second portions extending from the first portions are parallel to each other; a locking member having slots , the engagement sheets of the clamp member being configured to be able to be inserted through the slots , wherein the first portion is configured to be inserted into the slot of the locking member , and the first engagement portion is arranged on the second portion ; and an actuating and tensioning means comprising: a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets , and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member , characterized in that the locking member has a flared portion , the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet. a body portion provided with a second engagement portion engaged with the first engagement portion of the engagement sheets , and a force application mechanism attached to the body portion for applying a force on the locking member to shift a relative position between the locking member and the clamp member , characterized in that the locking member has a flared portion , the flared portion faces toward the enclosure of the clamp member, and an inner wall surface of the flared portion engages with the first portions of the engagement sheet. <EOS>