Connector for flexible printed circuit board

1. A connector for flexible printed circuit board, comprising:

an insulative housing having a rear section extending backwardly, the rear section having a rear space and a first peripheral wall around the rear space;

a plurality of contacts retained in the insulative housing, each contact having a connecting leg extending into the rear space, each connecting leg having a connecting portion and a resisting portion connecting with each other, the connecting portion and the resisting portion of each connecting leg being located at different level surfaces;

a fastener having a base, a mating section forwardly extending from the base and a board receiving chamber extending therethrough along a front to back direction, the mating section defining a contact receiving chamber communicating with the board receiving chamber along a top to bottom direction and a press section;

a first sealing ring being arranged between the first peripheral wall and the mating section of the fastener;

wherein the insulative housing has a fixed position to fix the fastener, and as moving the fastener to the fixed position, the press section presses against the resisting portion to drive the connecting portion projecting into the board receiving chamber, and the first sealing ring is sealed between the first peripheral wall and the mating section.

2. The connector for flexible printed circuit board as claimed in claim 1 , wherein the mating section further has an annular cavity corresponding to the first peripheral wall and a second peripheral wall around the annular cavity, as the fastener is fixed at the fixed position, the first peripheral wall is received in the annular cavity, and the first sealing ring is sandwiched between the first peripheral wall and the second peripheral wall.

3. The connector for flexible printed circuit board as claimed in claim 2 , wherein the first peripheral wall defines a recess recessed from outer surface thereof, the first sealing ring is retained in the recess.

4. The connector for flexible printed circuit board as claimed in claim 1 , wherein the connecting legs of all contacts are arranged in a row, the press section is present as a press wall perpendicularly extending from the base, and the press wall is formed with a press surface toward the board receiving chamber to guide and resist against the resisting portion, the mating section further has a limiting wall adjacent to the board receiving chamber for limiting the flexible printed circuit board from being deformed outwardly.

5. The connector for flexible printed circuit board as claimed in claim 4 , wherein the press wall defines a plurality of grooves corresponding to the contacts and a plurality of divided walls between adjacent grooves, the press surface is an inner surface of the groove.

6. The connector for flexible printed circuit board as claimed in claim 4 , wherein the mating section further has a pair of spring arms at two sides of the limiting wall, and each spring arm is formed with a limiting surface to limit the flexible printed circuit board from moving backwardly, the first peripheral wall is formed with a pair of projections corresponding to the spring arms, the projections resist against the spring arms toward the board receiving chamber as moving the fastener to the fixed position.

7. The connector for flexible printed circuit board as claimed in claim 1 , wherein the fastener further has an extension section backwardly extending from the base, the board receiving chamber extends through the extension section backwardly, and the connector further has a heat shrink tube setting around the flexible printed circuit board and attached to the extension section.

8. The connector for flexible printed circuit board as claimed in claim 1 , wherein the insulative housing further has a body section at a front side of the rear section, the body section defines an annular slot recessed from the outer surfaces thereof, the connector further has a second sealing ring retained in the annular slot.

9. The connector for flexible printed circuit board as claimed in claim 1 , wherein the connecting portions extend backwardly in the rear space, the resisting portions are bended in a reverse direction from a rear end of the connecting portions, and the connecting portion is formed with an emboss protruding outwardly.

10. The connector for flexible printed circuit board as claimed in claim 1 , wherein the insulative housing further has a body section at a front side of the rear section and a pair of fixing walls at two sides of the rear section, each fixing wall is formed with a fixing hole and a pair of fixing blocks protruding into the fixing hole, the fixing blocks in each fixing hole are arranged in the front to back direction, the fastener is further provided with a pair of fixing arms at two sides thereof, the fixing arms can alternatively engage with the fixing blocks to pre-fix or fix the fastener to the insulative housing.

11. A connector for flexible printed circuit board, comprising:

an insulative housing having a rear section extending backwardly, the rear section having a rear space and a first peripheral wall around the rear space;

a plurality of contacts retained in the insulative housing, each contact having a connecting leg extending into the rear space;

a fastener having a mating section to engage with the rear section and a board receiving chamber extending therethrough along a front to back direction;

a first sealing ring;

wherein the insulative housing has a fixed position to fix the fastener, and as moving the fastener to the fixed position, the connecting legs are pressed into the board receiving chamber for electrically connecting with the flexible printed circuit board, and the first sealing ring is sealed around a junction of the contacts and the flexible printed circuit board.

12. The connector for flexible printed circuit board as claimed in claim 11 , wherein the fastener is moved to the fixed position along a back to front direction, the mating section further has an annular cavity corresponding to the first peripheral wall and a second peripheral wall around the annular cavity, as the fastener is fixed at the fixed position, the first peripheral wall is received in the annular cavity, and the first sealing ring is sandwiched between the first peripheral wall and the second peripheral wall.

13. The connector for flexible printed circuit board as claimed in claim 12 , wherein the first peripheral wall defines a recess recessed from outer surface thereof, the first sealing ring is retained in the recess.

14. The connector for flexible printed circuit board as claimed in claim 11 , wherein the fastener further has a base and an extension section backwardly extending from the base, the mating section extends forwardly from the base, the board receiving chamber extends through the extension section backwardly, and the connector further has a heat shrink tube setting around the flexible printed circuit board and attached to the extension section.

15. The connector for flexible printed circuit board as claimed in claim 11 , wherein the insulative housing further has a body section at a front side of the rear section, the body section defines an annular slot recessed from an outer surface thereof, the connector further has a second sealing ring retained in the annular slot.