Electronic components of rotary type

An electronic component for electrical equipment comprising:

• a bearing sheath having a front and rear end, and an axially extending bore therein, said sheath being fixed on a frame of the electrical equipment,
• an operational shaft having portions extending internally and externally of said electrical equipment, said operational shaft being pivotally disposed in said bearing sheath,
• a substrate fixed to the rear end of said bearing sheath having means defining a resistor layer thereon,
• a brush holder mounted on the internal portion of said operational shaft so as to be rotated by rotation of said operational shaft, and
• at least one contact mounted on said brush holder for operatively contacting said resistor layer means formed on said substrate,
• wherein
• a central portion of said operational shaft is disposed in said bearing sheath and has an outer diameter smaller than the diameter of the bore in said bearing sheath, and
• said operational shaft is privotally held near said internal portion so that the external portion of said operational shaft has degrees of freedom in all tilting directions, wherein said brush holder has means defining a through-hole extending with an elongated cross-sectional shape and a tapered shape in an axial direction of said operational shaft, and said internal portion of said operational shaft is fixed to said brush holder by a fixing washer positioned interiorly of said tapered through-hole means.