High-precision slide rheostat

• Main Authors: QIU ZHIWEI, LIANG YANRONG, QIU WENCAI
• Format: Patent
• Language: Chinese; English
• Published: 16.09.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; RESISTORS

The utility model relates to the technical field of rheostats, in particular to a high-precision slide rheostat which comprises a base, supports are arranged at the two ends of the base, a porcelain barrel and a metal guide rail are arranged between the two supports, a resistance wire is evenly wound on the porcelain barrel, a sliding block is slidably connected to the metal guide rail, and the resistance wire is arranged on the sliding block. A contact piece is arranged below the sliding block, the end, away from the sliding block, of the contact piece is in sliding friction with the resistance wire and is electrically connected with the resistance wire, a dustproof shell is further arranged on the base, a sliding hole is formed in the middle of the dustproof shell, and a part of the sliding block penetrates through the sliding hole to be exposed out of the dustproof shell. A plurality of heat dissipation through holes are formed in the surface of the dustproof shell. The slide rheostat has a dustproof effec