| 摘要 |
<p>In a miniature, single-turn potentiometer (10), a fluid-tight seal (46, 54) is formed between the rotor (18) and the housing (16) by the interference fit between an annular ridge (46) on the peripheral edge (42) of the rotor (18) and a conforming groove (54) in the interior wall surface (44) of the housing cavity in which the rotor (18) is installed. In a preferred embodiment of the invention, there are two parallel ridges (46) and grooves (54), and they are configured to form a 'chevron' seal, in which the ridges (46) have a substantially saw-tooth shape in axial cross-section, with the grooves (54) having a complementary shape. The chevron seal provides a direct, rotor-to-housing seal that is fluid-tight, without the use of an O-ring, while also restraining the rotor (18) from axial movement with respect to the housing (12, 16).</p> |
