| 摘要 |
A miniature potentiometer including a casing (10) molded on a first sub-assembly comprises a support (11), an electro-resistant track (12) with extensions (13) linked to terminals (14) and (15) extending outwardly and a collector plate (16) extended in a terminal (17). A second sub-assembly housed in the casing (10) includes a wiper (18) integral with a wiper-holder (19). The sub-assemblies are attached to one another by an electrically conductive shaft (21). The wiper (18) comprises a first part defined by an annular plate (29) to which said wiper-holder (19) is molded, including an opening (31) and through-holes (32) allowing plastic material to flow therethrough, and a second part (33), extending out from said plate (29), having resilient arms (35, 36) with protuberances (35a, 36a) for frictionally engaging the track (12), said part (33) being folded 180 degrees against the bottom of the wiper-holder (19) and comprising a slight cross fold (33a) in opposite sense to the fold length (38). The extensions (13) are connected to said pair of terminals (14), (15) using two folded lateral appendages (14b, 14c, 15b, 15c), wrapped around both sides of said terminals (14, 15), one end of each appendage (14b, 15b) being in contact with said track (12) while the other end of appendages (14c, 14d) being superimposed on said appendage ends (14b, 15b) provides retention, before said casing (10) is molded. <IMAGE> |
