Assembly structure of electronic control unit and coil assembly of solenoid valve for electronic brake system
An assembly structure of an electronic control unit and a coil assembly of a solenoid valve for an electronic brake system connected to the electronic control unit having a printed circuit board and applying power to the solenoid valve. The coil assembly is penetrated to allow an upper portion of the solenoid valve to be fitted thereinto, and includes a cylindrical bobbin provided with a coil and a coil case. The electronic control unit is provided with a housing having an insertion groove and joined to the hydraulic control unit, the printed circuit board being disposed spaced apart from the coil assembly, and the housing is provided with an elastic member having one end contacting the printed circuit board and the other end contacting the coil case. The elastic member is configured with a coil spring to produce different elastic forces.
1. An assembly structure of an electronic control unit and a coil assembly of a solenoid valve for an electronic brake system connected to the electronic control unit having a printed circuit board installed therein and applying electric power to the solenoid valve installed in a hydraulic control unit, wherein:
the coil assembly has a central portion penetrated such that an upper portion of the solenoid valve is fitted thereinto, and includes a cylindrical bobbin provided with a coil wound around an outer circumferential surface thereof, and a coil case to surround the coil wound around the bobbin;
the electronic control unit is provided with a housing having an insertion groove formed therein to allow the coil assembly to be inserted thereinto and joined to the hydraulic control unit, the printed circuit board being disposed in the electronic control unit to be spaced a certain distance apart from the coil assembly; and
the housing is provided with an elastic member passing therethrough, one end of the elastic member contacting the printed circuit board and the other end contacting the coil case,
wherein the elastic member is configured with a coil spring to produce different elastic forces in opposite longitudinal directions.
2. The assembly structure according to claim 1 , wherein the elastic member comprises a first elastic portion to contact the printed circuit board and a second elastic portion to contact the coil case, wherein one of the first and second elastic portions is connected and fixed to the housing such that the first and second elastic portions provide different elastic forces.
3. The assembly structure according to claim 2 , wherein the first elastic portion provides elastic force weaker than elastic force provided by the second elastic portion.