Connector and contacts for use in the connector

1. A connector comprising:

a plurality of contacts; and

an insulator having a plurality of through-holes for receiving the plurality of contacts,

wherein each of the plurality of contacts comprises a resilient member and has rolled surfaces as contact surfaces, and two contacts of the plurality of contacts are disposed in each of the plurality of through-holes in such a manner that the contact surfaces of one of said two contacts face the respective contact surfaces of the other one of said two contacts in a direction perpendicular to a pitch array of the contacts that extends in a direction of a length of a connector and also extends in a direction substantially perpendicular to the plane of the contacts.

2. The connector according to claim 1 , wherein each of the plurality of contacts includes electric contact portions at upper and lower end portions thereof.

3. The connector according to claim 1 , wherein opening portions of the plurality of through-holes are arranged in a linear fashion on at least one surface of the insulator.

4. The connector according to claim 1 , wherein said two contacts are disposed in parallel to each other within the through-hole.

5. The connector according to claim 1 , wherein engaging portions for fixing the two contacts are formed on an inner wall of each of the plurality of through-holes.

6. Contacts which are used in a pair, each contact comprising:

a pair of contact portions which are formed at both ends of the contact and which come in electrical contact with associated electrodes on two opposed wiring boards which are used in an electronic device; and

a resilient member which couples the pair of contact portions,

wherein the contact portions are formed into rolled surfaces, and the contact portions of one of the contacts used in a pair face the respective contact portions of the other one of the contacts used in a pair in a direction perpendicular to a pitch array of the contacts that extends in a direction of a length of a connector and also extends in a direction substantially perpendicular to the plane of the contacts.

7. The contacts according to claim 6 , wherein each of the contacts includes:

a vertically extending columnar portion; and

strip-shaped portions extending from a middle portion of the columnar portion in up-and-down directions in a meandering fashion to the pair of contact portions.

8. The contacts according to claim 6 , wherein a plurality of engaging portions for engaging the contact with an inner wall of an insulator, which receives the contact, are formed on the columnar portion.

9. The contacts according to claim 7 , wherein the strip-shaped portion includes a U-shaped portion which extends in a horizontal direction, and a U-shaped portion which extends in a vertical direction.

10. An electronic device comprising:

a plurality of wiring boards which are stacked; and

a plurality of connectors which are disposed between the plurality of wiring boards, thereby to electrically connect the plurality of wiring boards,

wherein each of the connectors comprises:

a plurality of sets of contacts, each set being composed of a pair of contacts, each of the contacts comprising a resilient member and having rolled surfaces as contact surfaces, the contact surfaces of one of said pair of contacts facing the respective contact surfaces of the other one of said pair of contacts in a direction perpendicular to a pitch array of the contacts that extends in a direction of a length of a connector; and

an insulator in which a plurality of through-holes each receiving the pair of contacts are formed and also extends in a direction substantially perpendicular to the plane of the contacts.