Coaxial connector having improved central pin

1. A coaxial connector comprising:

a bracket defining a cavity;

a central pin received in the cavity and comprising a contact portion, a mounting portion, a fixing portion disposed between the contact portion and the mounting portion, said fixing portion having at least an engaging face extending along a direction angled to a rotating direction of the central pin; and

an insulative member mounted on the fixing portion of the central pin and disposed between the bracket and the central pin, said insulative member having a working face engaging with the engaging face of the central pin,

said insulative member being sandwiched and restricted between the contact portion and the mounting portion of the central pin; wherein said working face of the insulative member and the engaging face of the central pin are flattened, and wherein said fixing portion of the central pin is formed with a pair of opposite parallel engaging faces; and wherein said insulative member comprises a pair of semi-columnar insulative portions, said working face being formed on each insulative portion; and wherein a distance between the pair engaging faces is smaller than a diameter of the contact portion, and is smaller than a diameter of the mounting portion.

2. The coaxial connector as claimed in claim 1 , wherein each insulative portion has an arc-like cooperating face opposite to the working face, and wherein said bracket has an interferential inner surface having an inference with the cooperating face of the insulative portion.

3. The coaxial connector as claimed in claim 1 , further comprising a first cushion and a second cushion mounted on the central pin, said insulative member being sandwiched between the first and second cushions.

4. The coaxial connector as claimed in claim 3 , wherein said bracket has a protrusion protruding toward the cavity, said first cushion mounted on the contact portion of the central pin and abutting against the protrusion.

5. The coaxial connector as claimed in claim 3 , wherein said second cushion is formed with a shoulder portion, and wherein said coaxial connector comprises a ring mounted at the shoulder portion of the second cushion and abutting against the bracket.

6. The coaxial connector as claimed in claim 1 , wherein said mounting portion of the central pin has a thread portion formed with a plurality of threads and extending outwardly of the bracket.

7. The coaxial connector as claimed in claim 1 , wherein said bracket comprises a whorled portion having a whorled outer face, and a mating portion surrounding the cavity and separated from the whorled portion at a front portion of the bracket.

8. The coaxial connector as claimed in claim 1 , wherein said insulative member exerts a biasing force to the central pin along a direction perpendicular to the engaging face of the central pin.