Electrical connector assembly, electronic control unit using same, and electric power steering system therewith

1. An electrical connector assembly that is connected to a power source or a detection sensor through a cable, comprising:

a base body made of a synthetic resin, the base body having a bottom surface wall, a side surface wall standing up from a periphery of the bottom surface wall, and an interior space defined on the bottom surface wall and enclosed by the side surface wall; and

a connector body for achieving an electrical connection, the connector body extending from the bottom surface wall along the side surface wall through the interior space, wherein

the bottom surface wall of the base body has an inclined plane that gradually inclines, from one end to another end thereof, in relation to a horizontal plane, and

the interior space of the base body is filled with a sealing agent by allowing the sealing agent to flow down on the inclined plane by gravity.

2. The electrical connector assembly as claimed in claim 1 , wherein the sealing agent is discharged from an injection nozzle at a highest position of the inclined plane of the bottom surface wall to fill the interior space of the base body with the sealing agent.

3. The electrical connector assembly as claimed in claim 1 , wherein the inclined plane in a vertical section along an inclination direction of the inclined plane is straight, curved, or a combination of a straight portion and a curved portion.

4. The electrical connector assembly as claimed in claim 1 , wherein an inclination direction of the inclined plane is arranged along a longitudinal direction of the connector body in a transverse section of the connector body.

5. The electrical connector assembly as claimed in claim 1 , wherein the side surface wall is perpendicular to the horizontal plane.

6. An electronic control unit equipped with an electrical connector assembly that is connected to a power source or a detection sensor through a cable, the electrical connector assembly comprising:

a base body made of a synthetic resin, the base body having a bottom surface wall, a side surface wall standing up from a periphery of the bottom surface wall, and an interior space defined on the bottom surface wall and enclosed by the side surface wall; and

a connector body for achieving an electrical connection, the connector body extending from the bottom surface wall along the side surface wall through the interior space, wherein

the bottom surface wall of the base body has an inclined plane that gradually inclines, from one end to the other end thereof, in relation to a horizontal plane, and

the interior space of the base body is filled with a sealing agent by allowing the sealing agent to flow down on the inclined plane by gravity.

7. The electronic control unit as claimed in claim 6 , wherein the sealing agent is discharged from an injection nozzle at a highest position of the inclined plane of the bottom surface wall to fill the interior space of the base body with the sealing agent.

8. The electronic control unit as claimed in claim 6 , wherein the inclined plane in a vertical section along an inclination direction of the inclined plane is straight, curved, or a combination of a straight portion and a curved portion.

9. The electronic control unit as claimed in claim 6 , wherein an inclination direction of the inclined plane is arranged along a longitudinal direction of the connector body in a transverse section of the connector body.

10. The electronic control unit as claimed in claim 6 , wherein the side surface wall is perpendicular to the horizontal plane.

11. An electric power steering system comprising:

an electric motor for providing a steering assist force to a steering shaft;

an electronic control assembly for controlling the electric motor, the electronic control assembly being housed in an ECU housing; and an electrical connector assembly for connecting the electronic control assembly to a power source or a detection sensor through a cable, the electrical connector assembly being fixed to the ECU housing, the electrical connector assembly comprising:

a base body made of a synthetic resin, the base body having a bottom surface wall, a side surface wall standing up from a periphery of the bottom surface wall, and an interior space defined on the bottom surface wall and enclosed by the side surface wall; and

a connector body for achieving an electrical connection, the connector body extending from the bottom surface wall along the side surface wall through the interior space, wherein

the bottom surface wall of the base body has an inclined plane that gradually inclines, from one end to the other end thereof in relation to a horizontal plane, and

the interior space of the base body is filled with a sealing agent by allowing the sealing agent to flow down on the inclined plane by gravity.

12. The electric power steering system as claimed in claim 11 , wherein the sealing agent is discharged from an injection nozzle at a highest position of the inclined plane of the bottom surface wall to fill the interior space of the base body with the sealing agent.

13. The electric power steering system as claimed in claim 11 , wherein the inclined plane in a vertical section along an inclination direction of the inclined plane is straight, curved, or a combination of a straight portion and a curved portion.

14. The electric power steering system as claimed in claim 11 , wherein an inclination direction of the inclined plane is arranged along a longitudinal direction of the connector body in a transverse section of the connector body.

15. The electric power steering system as claimed in claim 11 , wherein the side surface wall is perpendicular to the horizontal plane.