Fuel sender device for vehicle

A fuel sender device for a vehicle, comprising,

• a resistance substrate having a conductor part and a contact plate having a contact point contacting the conductor part;
• a slot disposed in an inner surface of the contact plate;
• and
• a float unit including the contact point moving up and down through the slot according to a variation of an oil surface and according to an angular rotation of the contact plate,
• wherein only a portion of the float unit protrudes through the slot to be contactable with the conductor part,
• wherein the fuel sender device further comprises a variable contact point that allows the contact plate to variably contact the conductor part while moving up and down and rotating according to the variation of the oil surface,
• wherein the variable contact point is a ball-type point that point-contacts the conductor part,
• wherein the ball-type point comprises,
• a central axis member having an upper end and a lower end fixed to an upper part and a lower part of the slot in the inner surface of the contact plate, respectively, and disposed in a longitudinal direction of the slot;
• a spring inserted into an upper section of the central axis member;
• and
• a hollow ball inserted into a lower section of the central axis member between the spring and the inner surface of the contact plate and selectively compressing the spring according to a rise of the oil surface.