Electronic control device

1. An electronic control device comprising:

a housing which has an opening portion formed at one side thereof;

printed circuit boards which are inserted into the housing; and

a connector unit which includes connector pins coupled to the printed circuit boards and closes the opening portion of the housing,

wherein the printed circuit boards include a first printed circuit board, and a second printed circuit board which is connected to one side of the first printed circuit board through a substrate connecting portion and provided below the first printed circuit board, the connector unit includes a first connector pin connected to the first printed circuit board and a second connector pin connected to the second printed circuit board, and an outer connector cover of the connector unit is disposed to be directed upward.

2. The electronic control device of claim 1 , wherein the first printed circuit board is formed to be shorter than the second printed circuit board, and a length of a second connector inner pin of the second connector pin connected to the second printed circuit board is longer than a length of a first connector inner pin of the first connector pin connected to the first printed circuit board.

3. The electronic control device of claim 2 , wherein the first connector inner pin and the second connector inner pin are coupled to the first printed circuit board and the second printed circuit board, respectively, in a press-fit manner.

4. The electronic control device of claim 1 , wherein both sides of the housing include first guide portions which guide the insertion of the first printed circuit board, and second guide portions which guide the insertion of the second printed circuit board.

5. The electronic control device of claim 4 , wherein each of the first and second guide portions has stepped portions so that a width thereof is decreased from the opening portion.

6. The electronic control device of claim 4 , wherein a concave portion is formed between the first guide portion and the second guide portion.

7. The electronic control device of claim 1 , wherein the first printed circuit board has at least one escape hole penetratively formed vertically, and an electronic element mounted on the second printed circuit board is exposed through the escape hole.

8. The electronic control device of claim 1 , wherein the housing includes a connector coupling portion configured by an outer rim of the opening portion, the connector unit includes a mounting cover which is coupled to surround the connector coupling portion, and a lateral surface of the connector coupling portion and a lateral surface of the mounting cover are formed diagonally.

9. An electronic control device comprising:

a housing which has an opening portion formed at one side thereof;

printed circuit boards which are inserted into the housing; and

a connector unit which includes connector pins coupled to the printed circuit boards and closes the opening portion of the housing,

wherein the printed circuit boards include a first printed circuit board, and a second printed circuit board connected to a side of the first printed circuit board through a substrate connecting portion and provided below the first printed circuit board,

wherein the connector unit includes an outer connector cover formed to protect a portion of the connector pins,

wherein the connector pins are connected to the first printed circuit board or the second printed circuit board so that longitudinal axes of the connector pins are aligned in a direction perpendicular to the first printed circuit board or the second printed circuit board, and

wherein lateral surfaces of the housing include first guide portions which guide the first printed circuit board, and second guide portions which the second printed circuit board.

10. The electronic control device of claim 9 ,

wherein the connector pins include a first connector pin and a second connector pin, and

wherein the connector unit is coupled to the first printed circuit board and the second printed circuit board at a portion opposite to a portion where the substrate connecting portion is provided, and the connector unit includes the first connector pin coupled to the first printed circuit board, and the second connector pin coupled to the second printed circuit board.

11. The electronic control device of claim 9 , wherein the housing includes a connector coupling portion configured by an outer rim of the opening portion, the connector unit includes a mounting cover which is coupled to surround the connector coupling portion, and a lateral surface of the connector coupling portion and a lateral surface of the mounting cover are formed diagonally.