A kind of Miniature single duplex switch potentiometerTechnical field
It the utility model is related to potentiometer technical field, more particularly to a kind of Miniature single duplex switch potentiometer.
Background technology
The small-sized single connection plane switch potentiometer of in general, including carbon film plate, contact brush, rotating shaft, axle sleeve and shell, its switch sectionsStructure is that left weld tabs on base, is first inserted in spring by semitubular rivet riveting on column, then is inserted in switch moving plate, thenIt is stuck in by left weld tabs riveting in base 3, one end of spring on left weld tabs, the other end is pressed on switch moving plate, has switch moving plateThere is certain elastic force, and clamping switch moving plate will not produce displacement.Backhand welding piece on base, plays switch by semitubular rivet rivetingThe effect of stator.Switch shifting block is enclosed in potentiometer rotating shaft, and displacement will not be produced by rand pressing.
Using the switching point position device of this structure, the Dan Lian of potentiometer can only be realized.And each part can not be split, once damageIt is bad can only integral replacing, internal in addition is mostly that easily electrical contact occur bad for point contact.
Utility model content
The purpose of this utility model be in order to solve to exist in the prior art the shortcomings that unreasonable structure, loose contact, andA kind of Miniature single duplex switch potentiometer proposed.
To achieve these goals, the utility model employs following technical scheme：
A kind of Miniature single duplex switch potentiometer is designed, including shifting shaft and shell, shifting shaft are rotatably installed in shell,The shell includes switch enclosure and two potentiometer boxes, and the bottom of switch enclosure and the potentiometer box is equipped with docking boss, instituteThe docking recess being equipped with the top of switch enclosure and potentiometer box with docking projection shape matching is stated, the docking boss passes through spiral shellLine is arranged in docking recess；
Contact-making switch is provided with the switch enclosure, carbon film plate and public terminal, the carbon film are provided with the potentiometer boxThe both ends of piece are respectively connected with left and right terminal, and one end of the public terminal is provided with terminal contact, and the terminal contact is provided with circleThe groove of arcuation, is connected with holddown spring between the terminal contact and potentiometer box inwall, the holddown spring is sleeved on public affairsAltogether outside terminal, the shifting shaft is provided with conducting ring, and the conducting ring is set against groove, and the conducting ring is provided with reed,Brush is connected between the reed and carbon film plate.
Preferably, the contact-making switch includes the block piece, switch control handle and switch terminal being located in switch enclosure, described to openClose and back-moving spring is connected between control handle and block piece, the switch control handle end is connected with conductive jacket, the conductive shieldIt is sleeved on shifting shaft, the conductive jacket is provided with switch contact.
Preferably, the both ends of the shifting shaft are respectively equipped with axle sleeve and end cap, and the axle sleeve is rotatably installed in switch enclosure topPortion, the end cap are fixed on potentiometer cassette bottom portion, and the shifting shaft is inserted into end cap, and the end cap bottom thread is provided with lidPlate.
Preferably, the potentiometer box and switch enclosure are that symmetrical two parts composite assembly forms.
The utility model proposes a kind of Miniature single duplex switch potentiometer, beneficial effect is：Optimize the group of shellAssembling structure, two potentiometers can be installed, add the compact of structure, and switch can individually pull down with potentiometer and replaceChange, without integral replacing, reduce use cost, improve the structure of contact so that the connection that contact can be better, dropThe generation of low loose contact problem, there is antiwear effect under long-term use of situation.
Brief description of the drawings
Fig. 1 be the utility model proposes a kind of Miniature single duplex switch potentiometer structural representation；
Fig. 2 be the utility model proposes a kind of Miniature single duplex switch potentiometer switch enclosure structural representation；
Fig. 3 be the utility model proposes a kind of Miniature single duplex switch potentiometer potentiometer box structural representation.
In figure：Shifting shaft 1, axle sleeve 2, installation screw thread 3, conductive jacket 4, block piece 5, switch control handle 6, public terminal 7, pressureTight spring 8, end cap 9, cover plate 10, reed 11, docking boss 12, carbon film plate 13, potentiometer box 14, switch enclosure 15, switch contact16th, back-moving spring 17, switch terminal 18, left and right terminal 19, terminal contact 20, conducting ring 21.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried outClearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than wholeEmbodiment.
Reference picture 1-3, a kind of Miniature single duplex switch potentiometer, including shifting shaft 1 and shell, shifting shaft 1 are rotatablely installedIn shell, shell includes switch enclosure 15 and two potentiometer boxes 14, and potentiometer box 14 and switch enclosure 15 are symmetrical twoSubassembly is assembled.The both ends of shifting shaft 1 are respectively equipped with axle sleeve 2 and end cap 9, and axle sleeve 2 is rotatably installed in the top of switch enclosure 15,End cap 9 is fixed on the bottom of potentiometer box 14, and shifting shaft 1 is inserted into end cap 9, and the bottom thread of end cap 9 is provided with cover plate 10.
The bottom of switch enclosure 15 and potentiometer box 14 is equipped with the top of docking boss 12, switch enclosure 15 and potentiometer box 14The docking recess with docking the form fit of boss 12 is equipped with, docking boss 12 is by being threadably mounted in docking recess；SwitchBox 15 and potentiometer box 14 are using the docking of the structure of docking boss 12 and docking recess so that and change and maintenance becomes convenient,And switch enclosure 15 and potentiometer box 14 are that two parts of double of fractionation combine, and facilitate installation and the dimension of inner bodyRepair.
Contact-making switch is provided with switch enclosure 15, carbon film plate 13 and public terminal 7 are provided with potentiometer box 14, carbon film plate 13Both ends are respectively connected with left and right terminal 19, and one end of public terminal 7 is provided with terminal contact 20, and terminal contact 20 is provided with arc-shapedGroove, is connected with holddown spring 8 between terminal contact 20 and the inwall of potentiometer box 14, holddown spring 8 is sleeved on public terminal 7Outside, shifting shaft 1 is provided with conducting ring 21, and conducting ring 21 is set against groove, and conducting ring 21 is provided with reed 11, reed 11 and carbonBrush is connected between diaphragm 13.The conducting of contact-making switch controlling potential device, rotary dial axle 1 change reed 11 position so as toChanging internal resistance value, terminal contact 20 is pressed on conducting ring 21 by holddown spring 8, adds the compactness of contact, even ifConducting ring 21 occurs wearing and can also keep being in close contact, and the increase contact area of the groove provided with arc-shaped so that in potentiometerPortion's circuit connection is better.
Contact-making switch includes the block piece 5, switch control handle 6 and switch terminal 18 being located in switch enclosure 15, switchs control handle 6Back-moving spring 17 is connected between block piece 5, switch control handle 6 end is connected with conductive jacket 4, and conductive jacket 4, which is sleeved on, to be dialledOn moving axis 1, conductive jacket 4 is provided with switch contact 16.Rotary switch control handle 6 make switch contact 16 on conductive jacket 4 withThe contact of switch terminal 18 is so as to turning circuit.
Embodiment：Switch enclosure 15 and potentiometer box 14 are made using the docking of the structure of docking boss 12 and docking recessMust change and maintenance becomes convenient, the conducting of contact-making switch controlling potential device, rotary dial axle 1 change the position of reed 11 so as toChanging internal resistance value, terminal contact 20 is pressed on conducting ring 21 by holddown spring 8, adds the compactness of contact, even ifConducting ring 21 occurs wearing and can also keep being in close contact, and the increase contact area of the groove provided with arc-shaped so that in potentiometerPortion's circuit connection is better.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is notThis is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicalityNew technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility modelWithin enclosing.