| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid level detecting apparatus whose size and cost can be reduced by reducing frictional forces at the bearing portions of an arm member. SOLUTION: By arranging a shaft B being the rotary shaft of the arm member 6 and a shaft A being the rotary shaft of an arm 3 in parallel with each other while separating them by a predetermined distance D in their radial direction, the shaft portion 6b of the arm member 6, and its bearing portion 2d and bearing portion 14a can be arranged at positions separate from a boss portion 2a being a bearing for the arm 3, and the magnitude of frictional forces between the shaft portion 6b and both bearing portions 2d, 14a can be reduced by thinning the thickness of the shaft portion 6b to a necessary minimum. Moreover, by arranging the shaft B being the rotary shaft of the arm member 6, in other words, the shaft portion 6b of the arm member 6, inside a sector range F being the rotation range of the arm 3 and on the more resistance element 5 side than the shaft A, the length of the arm member 6, i.e., the length of an arm portion 6a can be shortened, and consequently the weight of the arm member 6 can be reduced. COPYRIGHT: (C)2009,JPO&INPIT
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