CN101325107B - Accurate waveband potentiometer - Google Patents
Accurate waveband potentiometer Download PDFInfo
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- CN101325107B CN101325107B CN2007100692695A CN200710069269A CN101325107B CN 101325107 B CN101325107 B CN 101325107B CN 2007100692695 A CN2007100692695 A CN 2007100692695A CN 200710069269 A CN200710069269 A CN 200710069269A CN 101325107 B CN101325107 B CN 101325107B
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- axle sleeve
- metal
- accurate
- hole
- waveband
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Abstract
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 on the 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 resistance value is more accurate.
Description
Technical field
The present invention relates to a kind of potentiometer, especially relate to a kind of potentiometer of accurate waveband.
Background technology
Potentiometer is indispensable a kind of components and parts in the signal of telecommunication process control system in numerous electronic instruments equipment.And the requirement of signal processing now is more and more meticulousr, thereby the precision of potentiometer also needs to improve thereupon.The precision that improves potentiometer generally has two kinds of methods, a kind of is to use digitized potentiometer instead, utilize logical block to carry out the control of resistance value, as the patent No. is 200520055052.5 disclosed a kind of digital regulation resistances, comprise working power, control unit resets, the exciting voltage output unit, toggle switch, keyboard and indicating module and CPU control unit, wherein said working power, control unit resets, the exciting voltage output unit, toggle switch, keyboard is connected with the CPU control unit respectively with indicating module and controlled by it, and this invention has solved the various drawbacks that wear problem brought that mechanical type potentiometer itself brings because of motion well.Yet digital regulation resistance needs working power simultaneously owing to there are a plurality of parts, makes that the cost of such potentiometer is high more a lot of than common potentiometer, can not be extensive use of, and manufacture also relative complex.Another kind is the fixed carbon resister prolongation with potentiometer, as the potentiometer that carries out Precision trimming adopts wirewound potential meter more, but because wound potentiometer manufacture craft and materials limitations, so volume ratio is bigger, the high resistant potentiometer is made difficulty, resistance wire is thinner, rub easily, make potentiometer lose efficacy, the patent No. is 200620023408.1 disclosed external glass glaze Precision trimming potentiometers, this patent of invention has possessed the characteristics of wound potentiometer, extended useful life simultaneously, but still the problem of fail basic workout cost and precision.Existing in addition potentiometer resistance can't carry out specific customized on demand, and this also makes the potentiometer adjustable extent narrow down, and has wasted the resistive segments of part.
Summary of the invention
The present invention mainly is that solution existing in prior technology potentiometer precision is low, and cost is big, the technical problem of manufacturing complexity etc., and a kind of high accuracy, low cost, manufacturing accurate waveband potentiometer simple, rational in infrastructure are provided.
The present invention also solves the existing in prior technology potentiometer resistance simultaneously and fixes, can't regulate the technical problem that causes resistance value section waste etc., and a kind of accurate waveband potentiometer that can have the resistance polytropy according to different needs is provided.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of accurate waveband potentiometer is provided, comprise shell, be affixed on enclosure circuit board, metal enclosing cover, with coaxial axle sleeve that is connected of metal enclosing cover and endless metal brush, its special feature is: described circuit board comprises the insulating barrier of central authorities, simultaneously post the number of metal contact chip at this insulating barrier, another side at this insulating barrier is provided with some Chip-Rs, and the Chip-R two ends all are electrically connected with adjoining Metal Contact sheet.Shell wherein can be circle, mounting circuit boards in the circular housing, axle sleeve, endless metal brush etc., the endless metal brushing tool of installing in the enclosure has certain elasticity, and compression contacts with the Metal Contact sheet in the enclosure, each Chip-R of back of circuit board is connected across adjacent metal contact chip two ends, behind the different Metal Contact sheet of endless metal brush contact, the output of potentiometer just forms different resistances, by high-precision Chip-R, the resistance variations of whole potentiometer is with regard to the corresponding precision that improved, change the resistance of Chip-R simultaneously, the resistance output of whole potentiometer also more tends to be reasonable.
As preferably, described circuit board simultaneously posts and the corresponding conducting strip of Metal Contact sheet being provided with Chip-R, described Chip-R two ends are welded on the conducting strip that closes on, and conducting strip then passes insulating barrier and is electrically connected with the Metal Contact sheet of insulating barrier another side.Chip-R is owing to less being difficult to is connected with the Metal Contact sheet through insulating barrier, thereby Chip-R can be earlier and conducting strip weld together, conducting strip passes insulating barrier and corresponding Metal Contact sheet electrical connection again, and this design is more suitable for the potentiometer of Chip-R as resistive segments.
As preferably, a side of described circuit board is provided with two binding posts, and this binding post one end is fixedlyed connected with described adjacent conductive sheet, and the other end then passes the outer wall of shell.The adjacent conductive sheet that is connected with binding post is as the end at the whole story of potentiometer, resistance value between the whole story section is the resistance of all Chip-Rs series connection, be the output resistance of this potentiometer maximum, this binding post passes the outer wall of shell, make the entire circuit plate tightly be fixed on enclosure.
As preferably, there is an axle sleeve hole in described metal enclosing cover central authorities, and there is an adjustment hole in described axle sleeve central authorities, and the axle sleeve side is provided with groove, by being installed in the axle sleeve hole of this groove axle sleeve activity.Axle sleeve can rotate in described axle sleeve hole, and is the rectangle inwall in the adjustment hole, thereby can use screwdriver that bearing is rotated, and bearing then drives the rotation of endless metal brush to form different output resistances.
As preferably, the bottom center of described shell is provided with a through hole, and the adjustment hole of this through hole and axle sleeve and axle sleeve hole are concentric holes.Axle sleeve one end is fixed on metal versatilely and covers outward, and the other end then passes the through hole of outer casing bottom, and this through hole mainly plays fixed hub.
As preferably, described circuit board is an annular, annular circular hole and the adjustment hole and the axle sleeve hole of described through hole, axle sleeve be concentric holes.Axle sleeve passes the axle sleeve hole of metal enclosing cover, the circular hole of circuit board, the through hole of shell, makes that whole potentiometer structure is more firm.
As preferably, described axle sleeve is provided with the fan-deck card body at the medial surface of metal enclosing cover, and described endless metal is swiped the card between this card body and metal enclosing cover, and fixes with the card body.This fan-deck card body mainly plays the effect of stationary annular metallic brush, makes axle sleeve endless metal brush in rotation to rotate synchronously, produces different output resistances to select different Metal Contact sheets.
As preferably, have a block on the card body of described axle sleeve, the edge of the through hole of described outer casing bottom has a guide vane end stop, and this guide vane end stop can spacing described block.The main effect of block is to produce potentiometer resistance at the whole story, when block when being limited to piece and at one end contacting, the output resistance of potentiometer is an extreme value.
As preferably, described endless metal brush away from card body end to circuit board direction projection, protruding height greater than the height of shell, have contact point to metal enclosing cover direction projection at endless metal brush two ends.The endless metal brush of installing is in the enclosure pushed by the metal enclosing cover, the endless metal brush section of projection is close on the Metal Contact sheet of circuit board, the basic point of endless metal brush is squeezed equally and is close to the metal enclosing cover simultaneously, metal enclosing cover, endless metal brush, Metal Contact sheet form an electric pathway, as an end of potentiometer output resistance.
As preferably, the material of described axle sleeve is plastics, and the material of described endless metal brush is a copper, and the precision of described Chip-R is ± 1%.The Chip-R full name is Chip Fixed Resistor, and promptly the chip fixed resistor is a kind of of metal glaze resistor.Be that metal powder and glass powdered frit are mixed, adopt the resistor of making on the silk screen seal substrate, humidity, high temperature, temperature coefficient is little, be a kind of very stable resistance, adopt this resistor not only can produce and export resistance accurately, can make that also this potentiometer performance parameter is more stable simultaneously as the resistance in the potentiometer.
Therefore, the present invention has rational in infrastructure, designs characteristics such as ingenious, convenient for production, especially provides a kind of Chip-R for potentiometer.Precision chip resistor is arranged on request on the double-sided PCB and replaces carbon film or metal film as resistive element, through becoming a kind of high accuracy potentiometer of wave band output after certain design processing, use potentiometer that this invention produces can reach according to the resistance value precision that many grades of wave bands of requirement of client are exported each grade output ± 1%, common potentiometer resistance accuracy is ± 20%, and each section output is uncontrollable; Other every key performances all have significantly and improve the technical major step of having pushed ahead as temperature, humidity resistance (variation) coefficient useful life.Make whole potentiometer more accurate, performance is more stable, comparing former carbon-film potentiometer will reach identical accuracy index and reduced very big cost, the weight and the volume of whole potentiometer also reduce greatly, are fit to more be used in the high-tech electronic equipment, as fields such as aviation, military affairs, because cost is low, this technology equally also can be widely used in civil area, makes that the adjusting of daily electrical equipment is more accurate, and bulking value also reduces.In a word, this patented technology makes progress in the potentiometer field, has certain creativeness.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of circuit board of the present invention;
Accompanying drawing 2 is a kind of structural representations of circuit board of the present invention and shell;
Accompanying drawing 3 is a kind of structural representations of metal enclosing cover of the present invention and axle sleeve;
Accompanying drawing 4 is end views of accompanying drawing 3;
Accompanying drawing 5 is a kind of structural representations of the present invention;
Component names:
Shell 1, through hole 12, limit body 13, circuit board 2, binding post 21, circular hole 22, conducting strip 23, Chip-R 24, Metal Contact sheet 25, metal enclosing cover 3, axle sleeve 4, adjustment hole 41, groove 42, card body 43, block 44, endless metal brush 5, contact point 51.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: the present invention is a kind of potentiometer of accurate waveband, the potentiometer of this accurate waveband comprises a round plastic shell 1, the shell middle part has a through hole 12, this through hole edge is provided with a limit body 13, be used to limit the rotation of axle sleeve, a circuit board 2 is close in bottom in the enclosure, two binding posts 21 stretch out on the circuit board, the outer wall that this binding post passes shell 1 is exposed at the outside of shell, use for wiring, circuit board central authorities are provided with circular hole 22, the slightly larger in diameter of circular hole is in the diameter of through hole 12, insulating barrier in the middle of this circuit board comprises, insulating barrier simultaneously posts eight conducting strips 23, and the conducting strip outer surface scribbles the insulation sides layer, seven Chip-Rs 24 are connected across respectively between the adjacent conductive sheet, described binding post then is welded on the conducting strip at the whole story, and Chip-R is sandwiched between outer casing bottom and the insulating barrier, as shown in Figure 1.Be provided with on the another side of insulating barrier and conducting strip 23 corresponding Metal Contact sheets 25, be similarly eight, this Metal Contact sheet contacts with the endless metal brush of installing in the enclosure, constitutes path, as shown in Figure 2.The top of shell is by a metal enclosing cover 3 sealings, this metal enclosing cover edge extends a binding post 31, central then have the axle sleeve hole concentric with described through hole 12, the movable axle sleeve 4 that plastics are installed in the axle sleeve hole, the axle sleeve center is a rectangle adjustment hole 41, this axle sleeve can rotate in axle sleeve hole by top groove 42, axle sleeve is provided with fan-deck card body 43 at the medial surface of metal enclosing cover, by this fan-deck card body, endless metal brush 5 is fixing with axle sleeve 4, endless metal is swiped the card between this card body 43 and metal enclosing cover 3, the endless metal brush rotates synchronously with axle sleeve, on the fan-deck card body, has a block 44, limit body 13 main and outer casing bottom limits the rotations of axle sleeves jointly, the endless metal brush is copper good conductor, and has elasticity, endless metal brush away from card body end to circuit board direction projection, the top of projection has contact point 51, protruding height greater than the height of shell, has contact point 51 to metal enclosing cover direction projection at endless metal brush two ends, the endless metal brush that is installed in enclosure is compressive state, make the bossing of endless metal brush be close on the Metal Contact sheet 24, contact point then is close to the outer interior surface of metal, make the metal enclosing cover, the endless metal brush, the Metal Contact sheet constitutes a path, metal enclosing cover edge outwards protrudes a binding post 32, binding post on this binding post and the circuit board is jointly as potentiometer output, wherein the binding post of metal enclosing cover is essential end, and the precision of described Chip-R is ± 1%.
Below be example with the resistance of concrete seven Chip-Rs, the process that whole potentiometer produces accurate output resistance is described, begin from the beginning resistance of Fig. 1 lower end that each resistance is respectively 3k till the last resistance of upper end, 2k, 2k, 1k, 4k, 2k, 5k, this resistance is designed to the resistance design of certain demand, when binding post is chosen the binding post of the beginning binding post of lower end among Fig. 1 and metal enclosing cover, adjustment hole with the screwdriver rotary sleeve, axle sleeve drives the rotation of endless metal brush by the fan-deck card body, the bossing of endless metal brush is close on the Metal Contact sheet and moves, when moving between 3k and 2k two Chip-Rs, the resistance of output is output as 3k, when moving between 2k and 2k two Chip-Rs, the resistance of output is output as 5k, by that analogy, when working as the Metal Contact sheet that moves to the 5k rear end, during just terminal Metal Contact sheet, the resistance of output is output as maximum 19k, in this process, circuit pathways is passed through with lower member, the binding post of metal enclosing cover, the endless metal brush, the Metal Contact sheet, conducting strip, Chip-R, conducting strip, binding post on the circuit board.
The art of this patent mainly substitutes the resistance of forms such as carbon film in the past by Chip-R, form accurate, stable, adjustable novel potentiometer, and the variation of miscellaneous part all belongs within the scope of this patent except that Chip-R.
Claims (10)
1. accurate waveband potentiometer, comprise shell (1), be affixed on enclosure circuit board (2), metal enclosing cover (3), with coaxial axle sleeve that is connected of metal enclosing cover (4) and endless metal brush (5), it is characterized in that: described circuit board (2) comprises the insulating barrier of central authorities, simultaneously post number of metal contact chip (25) at this insulating barrier, another side at this insulating barrier is provided with some Chip-Rs (24), and the Chip-R two ends all are electrically connected with adjoining Metal Contact sheet.
2. accurate waveband potentiometer according to claim 1, it is characterized in that: described circuit board simultaneously posts and the corresponding conducting strip of Metal Contact sheet (23) being provided with Chip-R, described paster (24) resistance two ends are welded on the conducting strip that closes on, and conducting strip then passes insulating barrier and is electrically connected with the Metal Contact sheet of insulating barrier another side.
3. accurate waveband potentiometer according to claim 1 and 2 is characterized in that: a side of described circuit board is provided with two binding posts (21), this binding post one end with the whole story conducting strip fixedly connected, the other end then passes the outer wall of shell.
4. accurate waveband potentiometer according to claim 1, it is characterized in that: there is an axle sleeve hole in described metal enclosing cover central authorities, there is an adjustment hole (41) in described axle sleeve central authorities, and the axle sleeve side is provided with groove (42), by being installed in the axle sleeve hole of this groove axle sleeve activity.
5. accurate waveband potentiometer according to claim 4 is characterized in that: the bottom center of described shell is provided with a through hole (12), and adjustment hole of this through hole and axle sleeve (41) and axle sleeve hole are concentric holes.
6. accurate waveband potentiometer according to claim 4 is characterized in that: described circuit board is annular, and the circular hole (22) of annular is a concentric holes with the adjustment hole and the axle sleeve hole of described through hole, axle sleeve.
7. accurate waveband potentiometer according to claim 1 is characterized in that: described axle sleeve is provided with fan-deck card body (43) at the medial surface of metal enclosing cover, and described endless metal brush (5) is stuck between this card body and the metal enclosing cover, and fixes with the card body.
8. accurate waveband potentiometer according to claim 7 is characterized in that: have a block (44) on the card body (43) of described axle sleeve, the edge of the through hole of described outer casing bottom has a guide vane end stop (13), and this guide vane end stop can spacing described block.
9. accurate waveband potentiometer according to claim 7, it is characterized in that: described endless metal brush away from card body end to circuit board direction projection, protruding height greater than the height of shell, have contact point (51) to metal enclosing cover direction projection at endless metal brush two ends.
10. accurate waveband potentiometer according to claim 1 is characterized in that: the material of described axle sleeve is plastics, and the material of described endless metal brush is a copper, and the precision of described Chip-R is ± 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100692695A CN101325107B (en) | 2007-06-12 | 2007-06-12 | Accurate waveband potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100692695A CN101325107B (en) | 2007-06-12 | 2007-06-12 | Accurate waveband potentiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101325107A CN101325107A (en) | 2008-12-17 |
| CN101325107B true CN101325107B (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100692695A Expired - Fee Related CN101325107B (en) | 2007-06-12 | 2007-06-12 | Accurate waveband potentiometer |
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| Country | Link |
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| CN (1) | CN101325107B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632782A (en) * | 2013-12-12 | 2014-03-12 | 东莞市长泰尔电子有限公司 | Potential encoding integrated structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069162U (en) * | 1990-01-22 | 1991-01-09 | 秦卫民 | Piezopotentiometer |
| CN201075322Y (en) * | 2007-06-12 | 2008-06-18 | 宁波宏韵电子有限公司 | Accurate waveband potentiometer |
-
2007
- 2007-06-12 CN CN2007100692695A patent/CN101325107B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069162U (en) * | 1990-01-22 | 1991-01-09 | 秦卫民 | Piezopotentiometer |
| CN201075322Y (en) * | 2007-06-12 | 2008-06-18 | 宁波宏韵电子有限公司 | Accurate waveband potentiometer |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平8-148313A 1996.06.07 |
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| CN101325107A (en) | 2008-12-17 |
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Granted publication date: 20110608 Termination date: 20130612 |