Connector

1. A connector for connecting with an external terminal on an electronic component, comprising:

a spiral contact which is wound a plurality of turns, wherein

the spiral contact has a single projection that projects outwardly toward an outer circumference of the turns, the spiral contact having no other projections, and

when the spiral contact is in contact with the external terminal, the single projection of the spiral contact comes into contact with the external terminal.

2. The connector of claim 1 , wherein the projection is formed in a vicinity of a tip of the spiral contact.

3. The connector of claim 1 , wherein an end of the projection constitutes an acute angle.

4. The contact of claim 1 , wherein the single projection is provided on an outer edge of the spiral contact.

5. A connector for connecting with an external terminal on an electronic component, the connector comprising:

a spiral contact, including:

a peripheral base portion;

a single spiral arm extending inwardly from the base portion and forming a plurality of turns, the spiral arm having an inner edge, an outer edge, and a tip located substantially at a center of the turns; and

a single projection projecting from the outer edge of the spiral arm outwardly toward the peripheral base portion, the spiral arm having no other projections thereon,

wherein the spiral contact comes into contact with the external terminal by the single projection.

6. The connector of claim 5 , wherein the single projection is formed in a vicinity of the tip of the spiral contact.

7. The connector of claim 5 , wherein an end of the projection constitutes an acute angle.