Joint connector

1. A joint connector, comprising:

an insulative connector housing including a board receiving portion;

a plurality of connection terminals, provided on the connector housing, which include projecting portions that project into the board receiving portion; and

a board, which is inserted into the board receiving portion of the connector housing, on which a conductive wire and a plurality of through holes that provide electrical connections to the conductive wire are formed,

wherein the projecting portions of the connection terminals contact to the conductive wire at the through holes of the board that is inserted into the board receiving portion of the connector housing to electrically connect predetermined connection terminals of the connection terminals with each other;

wherein the board is a multi-layer board having a plurality of board portions which are laminated to each other;

wherein a plurality of the conductive wires are respectively formed on the board portions; and

wherein the connection terminals contact to the conductive wire formed on a predetermined board portion of the board portions.

2. The joint connector as set forth in claim 1 , wherein a circuit, which is connected to the conductive wire, is formed on the board.

3. The joint connector as set forth in claim 1 , wherein the connector housing includes a mating terminal portion in which connector contacting portions of the connection terminals, which are provided on ends of the connection terminals opposed to the projecting portions in the board receiving portion, project into the mating terminal portion for mating with another terminal to be electrically connected to the connection terminals.

4. The joint connector as set forth in claim 1 , further comprising a cover, fitted to the connector housing to cover the board receiving portion of the connector housing and the board inserted therein.

5. The joint connector as set forth in claim 1 , wherein the board is detachably retained in the board receiving portion of the connector housing by the connector pins that are inserted into the through holes of the board.

6. The joint connector as set forth in claim 1 , wherein the projecting portions of the connection terminal include press-fit portion that resiliently deform when inserted into the through holes of the board.

7. A joint connector, comprising:

an insulative connector housing including a board receiving portion;

a plurality of connection terminals, provided on the connector housing, which include projecting portions that project into the board receiving portion; and

a board, which is inserted into the board receiving portion of the connector housing, on which a conductive wire and a plurality of through holes that provide electrical connections to the conductive wire are formed,

wherein the projecting portions of the connection terminals contact to the conductive wire at the through holes of the board that is inserted into the board receiving portion of the connector housing for electrically connecting predetermined connection terminals of the connection terminals with each other,

wherein the board is a single-layer board having a front face and rear face;

wherein a plurality of the conductive wires are respectively formed on the front and rear faces of the single-layer board; and

wherein the connection terminals contact to the conductive wire formed on at least one of the front and rear faces of the single-layer board.

8. The joint connector as set forth in claim 7 , wherein a circuit, which is connected to the conductive wire, is formed on the board.

9. The joint connector as set forth in claim 7 , wherein the connector housing includes a mating terminal portion in which connector contacting portions of the connection terminals, which are provided on ends of the connection terminals opposed to the projecting portions in the board receiving portion, project into the mating terminal portion for mating with another terminal to be electrically connected to the connection terminals.

10. The joint connector as set forth in claim 7 , further comprising a cover, fitted to the connector housing to cover the board receiving portion of the connector housing and the board inserted therein.

11. The joint connector as set forth in claim 7 , wherein the board is detachably retained in the board receiving portion of the connector housing by the connector pins that are inserted into the through holes of the board.

12. The joint connector as set forth in claim 7 , wherein the projecting portions of the connection terminal include press-fit portion that resiliently deform when inserted into the through holes of the board.