Electrical connector having a positioning protrusion with various thickness

1. An electrical connector for accepting an edge of a circuit board having a notch and a plurality of circuit board electrical contacts disposed on the edge, the electrical connector comprising:

an insulative housing that accepts the edge of the circuit board;

a positioning protrusion integrally formed with the insulative housing, the positioning protrusion being at least partially receivable within the notch of the edge of the circuit board; and

a plurality of contacts that are carried by the insulative housing and contact the circuit board electrical contacts;

wherein the positioning protrusion comprises a lower portion that is less than or the same thickness as a width of the notch, an upper portion that is thicker than the lower portion and the width of the notch, and a middle portion connecting the upper portion and lower portion, and

the middle portion having a thickness that changes symmetrically whereby the maximum thickness of the middle portion is larger than the thickness of the upper portion.

2. The electrical connector according to claim 1 , the electrical connector further comprising:

a biased support arm for retaining the circuit board so that the edge of the circuit board is retained within the electrical connector.

3. The electrical connector according to claim 1 , wherein the positioning protrusion extends from a top surface of the insulative housing to a bottom of the insulative housing.

4. The electrical connector according to claim 3 , wherein the positioning protrusion extends in a nonlinear fashion.

5. The electrical connector according to claim 3 , wherein the positioning protrusion extends in an arc.

6. An electrical connector for accepting an edge of a circuit board having a notch and a plurality of circuit board electrical contacts disposed on the edge, the electrical connector comprising:

an insulative housing that accepts the edge of the circuit board;

a positioning protrusion integrally formed with the insulative housing and extending from the insulative housing and at least partially receivable within the notch of the edge of the circuit board;

the positioning protrusion extends from a top surface of the insulative housing to a bottom of the insulative housing; and

a plurality of contacts that are carried by the insulative housing and contact the circuit board electrical contacts;

wherein the positioning protrusion comprises a lower protrusion extending from a left or a right side of the positioning protrusion and an upper protrusion extending from the left or right side of the positioning protrusion, wherein the upper protrusion extends further from the positioning protrusion than the lower protrusion, and wherein the upper protrusion is located closer to the insulative housing than the lower protrusion.

7. The electrical connector according to claim 6 , wherein the upper protrusion and lower protrusion extend away from the positioning protrusion so that at least one of the upper protrusion and the lower protrusion contact a face of the notch.

8. The electrical connector according to claim 6 , the electrical connector further comprising:

a biased support arm for retaining the circuit board so that the edge of the circuit board is retained within the electrical connector.

9. The electrical connector according to claim 6 , wherein the positioning protrusion extends in a nonlinear fashion.

10. The electrical connector according to claim 6 , wherein the positioning protrusion extends in an arc.