Stroke sensor apparatus for brake pedal and electronic brake system including thereof

A stroke sensor apparatus for a brake pedal, comprising:

• a hydraulic block;
• a rod assembly including a rod which moves linearly by operation of the brake pedal and having at least a part disposed in the hydraulic block;
• a magnet assembly including a magnet which moves with the same displacement as a displacement of the rod, and a magnet assembly path penetrating a central axis of the magnet, wherein the magnet assembly is disposed in the hydraulic block;
• and
• a sensor sensing a magnetic field change of the magnet, and generating an electrical signal corresponding to the displacement of the rod,
• wherein the hydraulic block includes:
• a rod chamber into which a rear end of the rod assembly is inserted;
• a magnet chamber provided to be adjacent to the rod chamber, and inserted with the magnet assembly, wherein the magnet chamber includes a chamber communication hole which communicates with the rod chamber;
• and
• a sensor seating unit having a recessed shape on an outer surface of the hydraulic block, adjacent to the magnet chamber, and mounted or disposed with the sensor.

A stroke sensor apparatus for a brake pedal, comprising:

• a hydraulic block;
• a rod assembly including a rod which moves linearly by operation of the brake pedal and having at least a part disposed in the hydraulic block;
• a magnet assembly including a magnet which moves with the same displacement as a displacement of the rod, and a magnet assembly path penetrating a central axis of the magnet, wherein the magnet assembly is disposed in the hydraulic block;
• and
• a sensor sensing a magnetic field change of the magnet, and generating an electrical signal corresponding to the displacement of the rod;
• wherein the hydraulic block includes:
• a rod chamber into which a rear end of the rod assembly is inserted;
• and
• a magnet chamber provided to be adjacent to the rod chamber, and inserted with the magnet assembly, wherein the magnet chamber includes a chamber communication hole which communicates with the rod chamber, and
• wherein the rod assembly further includes:
• a rod housing including a piston through-hole which communicates to a front side from an opening of the rod chamber, and fastened to a front surface of the hydraulic block and closing an opening of the magnet chamber;
• a first piston fastened to a rear end of the rod, and moving with the same displacement as the displacement of the rod;
• a plunger fastened to a rear end of the first piston, and moving with the same displacement as a displacement of the first piston;
• a plunger cap provided between a front end of the plunger and the first piston;
• and
• a second piston fastened to a rear end of the plunger, and disposed in the rod chamber,
• wherein the magnet assembly further includes
• a magnet housing having a cylindrical shape,
• a magnet fastening unit covering an outer surface of the magnet and provided inside the magnet housing and fastened to the magnet, and
• a mounting unit having a ring-shaped structure with one side open and provided on a front end of the magnet housing, and fixed between a first piston stopper provided on the rear end of the first piston and a plunger cap flange provided on a rear end of the plunger cap.