Accurate waveband potentiometer
A potentiometer and band technology, which is applied in the field of precision band potentiometers, can solve the problems of fixed resistance of potentiometers, waste of resistance value segments, and low precision of potentiometers, and achieve the effects of precise adjustment, reasonable structure, and cost reduction
Inactive Publication Date: 2011-06-08
宁波宏韵电子有限公司
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Problems solved by technology
[0003] The present invention mainly solves the technical problems of low precision, high cost and complicated manufacture of the potentiometer in the prior art, and provides a precision band potentiometer with high precision, low cost, simple manufacture and reasonable structure.
[0004] At the same time, the present invention also solves the technical problems of the prior art that the resistance value of the potentiometer is fixed and cannot be adjusted, which leads to the waste of the resistance value segment, and provides a precision band potentiometer that can have variable resistance value according to different needs.
Method used
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Embodiment
[0024] Embodiment: The present invention is a precision band potentiometer. The precision band potentiometer includes a circular plastic shell 1 with a through hole 12 in the middle of the shell. A limiting body 13 is provided at the edge of the through hole for limiting The rotation of the shaft sleeve is close to a circuit board 2 at the bottom of the shell, and two connecting terminals 21 are extended outward on the circuit board. The connecting terminals pass through the outer wall of the shell 1 and are exposed on the outside of the shell for wiring. A round hole 22 is arranged in the center, and the diameter of the round hole is slightly larger than the diameter of the through hole 12. The circuit board includes an insulating partition in the middle, and eight conductive sheets 23 are attached to one side of the insulating partition, and the outer surface of the conductive sheet is coated with an insulating side layer. , the seven chip resistors 24 are respectively connec...
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The invention relates to a precision wave band potentiometer, which comprises an outer casing, a circuit board adhered at the inner part of the outer casing, a metal outer cover, an axle sleeve coaxially connected with the metal outer cover and a ring-shaped metal brush. The circuit board comprises an insulating baffle at the center, a plurality of metal contact strips are adhered on one side of the insulating baffle, a plurality of conducting strips corresponding to the metal contact strips are arranged on the other side of the insulating baffle, a plurality of chip resistors are arranged onthe conducting strips, and by adopting the good temperature and humidity resistance (variation) coefficient of the chip resistors, the service life can be greatly prolonged, and the output resistancevalue is more accurate.
Description
technical field [0001] The invention relates to a potentiometer, in particular to a potentiometer with precision band. Background technique [0002] The potentiometer is an indispensable component in the electrical signal processing control system in many electronic instrumentation equipment. However, today's signal processing requires more and more precision, so the accuracy of the potentiometer also needs to be improved. There are generally two ways to improve the accuracy of the potentiometer. One is to use a digital potentiometer and use a logic unit to control the resistance value, such as a digital potentiometer disclosed in Patent No. 200520055052.5, including working power supply, reset control unit, excitation voltage output unit, dial switch, keyboard and indication module and CPU control unit, wherein the working power supply, reset control unit, excitation voltage output unit, dial switch, keyboard and indication module are respectively connected to the CPU cont...
Claims
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IPC IPC(8): H01C10/00
Inventor 潘英民
Owner 宁波宏韵电子有限公司