Pedal device with function of adjusting pedal effort and hysteresis

A pedal device with a function of adjusting a pedal effort and hysteresis, the pedal device comprising:

• a housing;
• a pedal arm hinged to the housing;
• an elastic member disposed between the housing and the pivot end of the pedal arm, and providing a return force to the pedal arm;
• a pedal effort adjusting unit disposed in the housing and pressing an end of the elastic member to adjust a pre-compression force to the elastic member force;
• and
• a hysteresis adjusting unit movably disposed in the housing to press the hinged portion of the pedal arm and adjusting the amount of change in stroke-to-pedal effort while the pedal arm operates,
• wherein the elastic member is composed of a large-diameter spring and a small-diameter spring that is coaxially disposed at a predetermined distance inside the large-diameter spring,
• the pedal effort adjusting unit includes an outer adjusting bolt inserted in a first fastening hole and having an additional second fastening hole at the center of the outer adjusting bolt, and an inner adjusting bolt inserted in the second fastening hole and pressing an upper end of the small-diameter coil spring,
• the hysteresis adjusting unit includes a friction arm of which the center portion is hinged to the housing by a hinge pin, an end is in contact with the hinged portion of the pedal arm, and an opposite end has a through-hole through which the small-diameter coil spring passes, and is supported by an upper end of the large-diameter coil spring to be in contact with the outer adjusting bolt, and
• a fastening hole in which the hinge pin is inserted is formed at the center portion of the friction arm, a curved concave contact surface is formed at an end of the friction arm to be in contact with the hinged portion of the pedal arm, and a through-hole is formed at an opposite end of the friction arm through which the small-diameter coil spring passes such that the upper end of the large-diameter coil spring contacts with the friction arm.