Card edge connector

1. A card edge connector comprises:

a bar insulator base provided with a plurality of sockets;

a group of connecting terminals arrayed in parallel;

two arm supports arranged between both ends of the insulator base; and

a rotation shaft extending out of relatively an inner side of each arm support, the rotation shaft constituting a hinge shaft through which each auxiliary supporting bracket is articulated and connected with the respective arm support, each auxiliary supporting bracket being correspondingly provided with a groove sheathed with the respective rotation shaft to cause relative rotation of each auxiliary supporting bracket and the respective arm support,

wherein the connecting terminals are inserted into the sockets of the insulator base to constitute a group of socket electrodes electrically connected with a circuit board, the two arm supports being respectively provided with an auxiliary supporting bracket connected with the circuit board; and

wherein each auxiliary supporting bracket is mutually sheathed, articulated and connected with one respective arm support.

2. The card edge connector according to claim 1 , wherein each auxiliary supporting bracket is provided with a bottom edge welded with the circuit board, the bottom edge being upwardly extended with an upright part which is connected to one end of a connecting part, another end of the connecting part being downwardly extended with a flange, a space being defined among the flange, the connecting part and the upright part, the space constituting the groove.

3. The card edge connector according to claim 2 , wherein the rotation shaft is a strip-shaped component, an upper end and a lower end of the rotation shaft being respectively provided with a cambered surface, the rotation shaft being respectively contacting with an internal superface of the connecting part and an upper surface of the bottom edge in the auxiliary supporting bracket, a matching surface between the connecting part and the upper end of the rotation shaft being a cambered surface.

4. The card edge connector according to claim 3 , wherein the bottom edge of each auxiliary supporting bracket is upwardly extended with an elastic locking tongue piece, a top of the elastic locking tongue piece contacting with the lower end of the rotation shaft.

5. The card edge connector according to claim 3 , wherein a radius of a cambered surface of the connecting part is larger than a radius of the cambered surface on the upper end of the rotation shaft.

6. The card edge connector according to claim 3 , wherein a vertical cut is defined between the connecting part and the upright part.

7. A card edge connector comprising:

a bar insulator base provided with a plurality of sockets;

a group of connecting terminals arrayed in parallel;

two arm supports arranged between both ends of the insulator base; and

a gripping mechanism arranged at corresponding position of each auxiliary supporting bracket and the respective arm support, the gripping mechanism being configured for restricting a longitudinal displacement of the auxiliary supporting bracket along the respective arm support,

wherein the connecting terminals are inserted into the sockets of the insulator base to constitute a group of socket electrodes electrically connected with a circuit board, the two arm supports being respectively provided with an auxiliary supporting bracket connected with the circuit board;

wherein each auxiliary supporting bracket is mutually sheathed, articulated and connected with one respective arm support; and

wherein the gripping mechanism comprises a locking hole arranged on a rotation shaft and an anti-retreating elastic tongue piece stuck in the locking hole.

8. The card edge connector according to the claim 7 , wherein a bottom of the anti-retreating elastic tongue piece is arranged on an internal wall of the upright part, a top of the anti-retreating elastic tongue piece obliquely extending into the groove along an installation direction of the auxiliary supporting bracket.