Force sensor using displacement amplification mechanism and apparatus having the same for measuring weight

An apparatus for measuring weight using a displacement amplification mechanism, the apparatus comprising:

• a base;
• an elastic structure provided as a housing disposed on the base, and downwardly deformed when weight of an object to be measured is applied to the elastic structure;
• an adjusting member coupled to an upper surface of the elastic structure by penetrating the upper surface of the elastic structure;
• a lever disposed below the elastic structure, and amplifying a displacement of the elastic structure transferred via the adjusting member by being in contact with the adjusting member;
• a sensor disposed above the base, and generating an electric signal indicative of a distance from the sensor to the lever;
• a circuit board disposed between an upper surface of the base and a lower surface of the sensor;
• and
• a converter converting the electric signal received from the sensor into weight information,
• wherein the lever is installed to be movable in a horizontal direction such that positions of input force, output force, and fulcrum are adjusted based on a horizontal position of the lever.

A force sensor, comprising:

• a base;
• an elastic structure provided as a housing disposed on the base, the elastic structure being spaced from the base in a first direction and deformed in the first direction when force is applied to the elastic structure;
• a lever spaced from the elastic structure in the first direction, and amplifying a displacement of the elastic structure;
• a sensor disposed between the base and the lever in the first direction, and generating an electric signal indicative of a distance from the sensor to the lever;
• and
• a circuit board disposed between an upper surface of the base and a lower surface of the sensor.