CN104392814A - Rheostat - Google Patents
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- CN104392814A CN104392814A CN201410709537.5A CN201410709537A CN104392814A CN 104392814 A CN104392814 A CN 104392814A CN 201410709537 A CN201410709537 A CN 201410709537A CN 104392814 A CN104392814 A CN 104392814A
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- 230000007547 defect Effects 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 33
- 239000010959 steel Substances 0.000 description 33
- 238000002474 experimental method Methods 0.000 description 16
- 230000007812 deficiency Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000002788 crimping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000001835 salubrious effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention belongs to the field of rheostats. The rheostat in the prior art has the following defects: 1, resistance wires are easy to break; 2, vibration is generated; and 3, noise is generated along with vibration. The technical scheme adopted for solving the technical problems is as follows: the invention provides a rheostat which comprises a panel, resistance wires, binding posts, a sliding rail and a sliding vane, wherein the binding posts are vertical to the panel and are fixedly connected with the panel; the sliding rail is parallel to the resistance wires; the sliding rail is fixedly connected with the panel; the sliding vane is used for sliding along the sliding rail; and the sliding rail, the resistance wires and the sliding vane are electrically connected. The rheostat is characterized in that one end of each resistance wire is fixedly and electrically connected with one of the binding posts; the other end of each resistance wire is in tight contact with the binding post matched with the end and electrically connected with the end and is connected with an elastic cable for pulling the resistance wire to enable the resistance wire to get a tension; and the other end of each elastic cable is fixedly connected to the panel. The rheostat is simple in structure and is used for solving the problems of wire breaking, vibration, noise and the like.
Description
Technical field
The invention belongs to slide rheostat field.
Background technology
The patent No. is ZL2009201400472(title: luminous varistor) document disclose a kind of rheostat, this rheostat existing has obtained and has used widely, and in use find following not enough: 1, resistance wire easily breaks.2, there are vibrations to produce.3, with noise when vibrations.
There is such deficiency in the rheostat of prior art: 1, and resistance wire easily breaks.2, there are vibrations to produce.3, with noise when vibrations.After creationary thinking, finding, determine problem Producing reason as follows:
1, resistance wire 1 expanded by heating, bends, and resistance wire contacts tightness degree and occurs obviously to change with slide plate, produce spark, resistance wire fuses, and fusing is also named and blown.
2, after resistance wire 1 expanded by heating, resistance becomes large (resistance become very much not only length variations cause), and electric current reduces, electric current reduces, and causes again resistance wire to shrink, and so repeatedly, causes vibrations, when vibrations, resistance wire and slide plate also may produce spark, and then cause resistance wire to fuse.
Judge the reason of these deficiencies to verify, done following experiment: 1, electricity consumption heat gun continues to blow resistance wire, resistance wire is made to remain on a higher temperature as far as possible, find that vibrations obviously reduce, noise also decreases, and the probability of fusing resistor silk also reduces.2, after adopting current limliting connection to connect a larger resistance to rheostat, also find that vibrations obviously reduce, noise also decreases, and the probability of fusing resistor silk also reduces.3, lower the temperature to resistance wire with normal temperature moving air, find that various " defect " occurrence probability improves.4, use the Power supply that internal resistance is less instead, various " defect " occurrence probability improves.
Above-mentioned two experiments confirm guess.
In order to allow this rheostat be easy to use, certainly can not demonstrate this rheostat, while blow with heat gun.Dealing with problems conveniently, be also not easy to use the method connecting larger resistance to solve problem, because it is very harsh to the requirement of power supply to deal with problems like this, this experiment have employed very complicated power supply! So, need to find a simple method to solve.
Resistance wire------this problem of easily breaking never is well solved.Although vibrations and noise are closely connected, about this device of prior art, never people notes this problem, and more nobody thinks deeply the reason of this problem.In this patent, not only propose the reason of this deficiency, give the technical scheme of dealing with problems.From this point, the technical scheme described in this patent is also creative.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention discloses following technical scheme, and this technical scheme solves above-mentioned deficiency, and the technical scheme that technical solution problem of the present invention adopts is:
A kind of rheostat, comprise panel, resistance wire, the binding post be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
Resistance wire one end is fixedly connected with binding post and is electrically connected;
Resistance wire other end close contact and this end supporting and be the binding post be electrically connected with this end, and this one end of resistance wire connect one for tractive resistance wire, make resistance wire under tension elastomeric cords;
The other end of elastomeric cords is fixedly connected on panel.
A kind of damping rheostat, comprise panel, resistance wire, the binding post be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
Resistance wire one end is fixedly connected with binding post and is electrically connected;
Resistance wire other end close contact and this end supporting and be the binding post be electrically connected with this end, and this one end of resistance wire connect one for tractive resistance wire, make resistance wire under tension elastomeric cords;
The other end of elastomeric cords is fixedly connected on panel,
The angle of elastomeric cords and resistance wire is 30---60 degree.
A kind of rheostat of anti-breaking resistance wire, comprise panel, resistance wire, the binding post be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
The equal close contact in two ends of resistance wire and this end supporting and be the binding post be electrically connected with this end, and the two ends of resistance wire respectively connect one for tractive resistance wire, make resistance wire under tension elastomeric cords;
Elastomeric cords one end contact resistance silk, the other end is fixedly connected on panel.
Slide rheostat, comprise panel, resistance wire, the binding post be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
The equal close contact in two ends of resistance wire and this end supporting and be the binding post be electrically connected with this end, and the two ends of resistance wire respectively connect one for tractive resistance wire, make resistance wire under tension elastomeric cords;
Elastomeric cords one end contact resistance silk, the other end is fixedly connected on panel,
And: the angle of elastomeric cords and resistance wire is 30---60 degree.
The structure of described binding post is such: have one perpendicular to panel and have one end to be fixedly connected on the centered cylinder of panel, and the outside of centered cylinder is also arranged with a cylinder, and centered cylinder and cylinder are all made up of conductor.
Described panel is provided with a hole, and resistance wire is arranged at the front of panel, and elastomeric cords is arranged at the back side of panel.
Elastomeric cords is spring.
Elastomeric cords is rubber band.
Described elastomeric cords is spring, and stiffness factor is 200N/m or 1500N/m or 2500N/m.
Described elastomeric cords is rubber band, and stiffness factor is 200N/m or 1500N/m or 2500N/m.
A kind of slide plate, comprises the sliding sleeve for sheathed slide rail 8, it is characterized in that:
There is the first arc silk 42 for contact resistance silk 1, also have the second arc silk 42 for contact resistance silk,
One end of first steel wire 41 is fixedly connected with and is electrically connected sliding sleeve 46, the other end of the first steel wire 41 is fixedly connected with and is electrically connected the first arc silk 42, one end of second steel wire 43 is fixedly connected with and is electrically connected sliding sleeve 46, the other end of the second steel wire 43 is fixedly connected with and is electrically connected the second arc silk 44
The tie point distance panel 5 of the first steel wire 41 and sliding sleeve 46 is comparatively near, and the tie point distance panel 5 of the second steel wire 43 and sliding sleeve is comparatively far away,
First arc silk 42 is comparatively far away apart from panel 5, and the second arc silk 44 is comparatively near apart from panel 5,
The shape of the first arc silk 42 is: the arc bending towards resistance wire 1 direction, and the shape of the second arc silk 44 is: the arc bending towards resistance wire 1 direction,
Between first steel wire 41 and the second steel wire 43, be provided with the spring 45 for strutting the first steel wire 41, second steel wire 43, the direction of spring 45 deformation is parallel with resistance wire 1.
Above technical scheme can combinationally use at zone of reasonableness.
The present invention have structure simple, solve easily broken problem, overcome the generation of vibrations and noise simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is the structural representation of the embodiment of the present invention one.
Fig. 3 is the structural representation of the embodiment of the present invention two.
Fig. 4 is the partial structurtes schematic diagram of the embodiment of the present invention two.
Fig. 5 is the partial structurtes schematic diagram of the embodiment of the present invention three.
Fig. 6 is the structural representation of the embodiment of the present invention four.
Fig. 7 is the structural representation of the embodiment of the present invention five.
Fig. 8 is the structural representation of the embodiment of the present invention six.
Fig. 9 is the embodiment of the present invention seven partial structurtes schematic diagrames.
Figure 10 is the embodiment of the present invention seven partial structurtes schematic diagrames.
In figure: 1-resistance wire, 2-binding post, 21-centered cylinder, 22-cylinder, 3-elastomeric cords, 4-slide plate, 5-panel, 6-base, 7-hole, 8-slide rail, 41-first steel wire, 42-first arc silk, 43-second steel wire, 44-second arc silk, 45-spring, 46-sliding sleeve.
Embodiment
See accompanying drawing 1, it is the structural representation of prior art.The rheostat of prior art comprises: panel 5, base 6 for support panel, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate 4 slided along slide rail, slide rail, resistance wire 1 are all electrically connected with slide plate 4.Resistance wire is fixedly connected with binding post (certainly: resistance wire and binding post are also be electrically connected), if resistance wire is comparatively thick, in order to make it luminous, this is harsher to the requirement of power supply just to need larger current-----, so this rheostat all uses very thin resistance wire.
Embodiment one
See accompanying drawing 2, it is structural representation of the present invention.A kind of rheostat, comprise panel 5, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate 4 slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
Resistance wire 1 one end is fixedly connected with binding post 2 and is electrically connected;
Resistance wire 1 other end close contact and this end supporting and be the binding post 2 be electrically connected with this end, and this one end of resistance wire connect one for tractive resistance wire, make resistance wire under tension elastomeric cords 3;
The other end of elastomeric cords 3 is fixedly connected on panel 5.
Explanation to technique scheme:
1, panel 5, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, and for the slide plate 4 slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate that-------these are prior aries.
2, be electrically connected in this application mean that this connection can be conducted electricity.In fact, various equivalent modifications should be known those contact points and will be electrically connected, and which parts should be insulated from each other.
3, resistance wire 1 other end close contact and this end supporting and be the binding post 2 be electrically connected with this end.Resistance wire has two ends, and one end is that a, a connect a binding post; The other end is that b, b also connect a binding post, and so, a binding post is just called holds supporting binding post with resistance wire a, and b binding post is just called holds supporting binding post with resistance wire b.Close contact is different from and is fixedly connected with, and cause is closely: electric conductivity closely can be made good, reduce contact resistance.Although tight two words have not illustrated great power, various equivalent modifications should know the meaning of tight two words.
4, elastomeric cords 3 is used for tractive resistance wire, makes resistance wire 1 always keep tensioned state.Elastomeric cords can adopt spring or rubber band.
Described elastomeric cords 3 is spring, and stiffness factor is 200N/m or 1500N/m or 2500N/m.
Described elastomeric cords 3 is rubber band, and stiffness factor is 200N/m or 1500N/m or 2500N/m.
Using method: the length of adjustment elastomeric cords 3, makes elastomeric cords 3 strain resistance wire 1, various equivalent modifications should know pulling force can not be too large, otherwise can break resistance wire.Connect rheostat by current limliting connection in circuit, can see that effective resistance is in luminescence.
Why can elastomeric cords 3 solve the deficiencies in the prior art? be analyzed as follows: 1, elastomeric cords 3 allows resistance wire 1 always keep tensioned state, after resistance wire 1 expanded by heating, elastic force between resistance wire 1 and slide plate does not occur to change too soon, thus make between slide plate and resistance wire, to produce the reduction of pyrophoric possibility, so the probability disconnected at slide plate place reduces.2, resistance wire expanded by heating, resistance increases, and then electric current reduces, and resistance wire shrinks again, still occurs in continuation although expand and shrink, had elastomeric cords (such as spring) to cushion, vibrations reduce greatly.Although belong to routine techniques means with spring buffer, a straight resistance wire shakes, and be that nobody proposes to be that this reason causes, more nobody proposes solution, and from this angle, the technical program is creative before.
An elastomeric cords solves multiple deficiencies of prior art, and, solve and severally seem the problem of not theing least concerned, certainly, vibrations and noise causality, but who can expect again what same reason caused for resistance break silk and noise? even if guess is to this reason, not testing confirmation is this reason really, and what difference such guess and the meaning of drawing lots do not have yet.
Embodiment two
See accompanying drawing 3, it is the structural representation of the present embodiment.A kind of damping rheostat, comprise panel 5, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate 4 slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
Resistance wire 1 one end is fixedly connected with binding post 2 and is electrically connected;
Resistance wire 1 other end close contact and this end supporting and be the binding post 2 be electrically connected with this end, and this one end of resistance wire connect one for tractive resistance wire, make resistance wire under tension elastomeric cords 3;
The other end of elastomeric cords 3 is fixedly connected on panel 5,
Elastomeric cords 3 is 30---60 degree with the angle of resistance wire 1.
Explain: it is why better that elastomeric cords 3 and resistance wire 1 exist angle? resistance wire 1 can be made like this to contact more closely with binding post.
Elastomeric cords 3 is 30---60 degree with the angle of resistance wire 1.What is angle of the present invention, below providing definition: see accompanying drawing 4, is front view, shows resistance wire 1, binding post 2, elastomeric cords 3 in figure, resistance wire 1 place extend, then, to the bending of binding post 2 direction, that is allow elastomeric cords 3 and resistance wire 1 that binding post is fenced up, at this time, belonging to resistance wire 1 place straight line and elastomeric cords 3 pulling force, straight line has an angle, and this angle is exactly angle of the present invention, such as, angle A in accompanying drawing 4.If resistance wire 1 and elastomeric cords 3 be not in same plane, so, angle resistance wire and elastomeric cords all being projected to the correspondence after panel also belongs to angle of the present invention.
Only talk angle, may belong to unclear statement, had above-mentioned explanation, angle two word just belongs to and clearly describes.
In addition: here why angle wants 30 degree----60 degree? because: when this angle is too large, the contact of resistance wire and binding post is just little, causes the deficiency that contact resistance is too large.When this angle is too little, because the frictional force between resistance wire and binding post may be very large, the pulling force that elastomeric cords 3 applies cannot be applied to resistance wire 1.
Embodiment three
Meet such relation to allow between binding post and resistance wire: 1, close contact, 2, elastomeric cords can be good at pulling force to be applied to resistance wire, and the structure of described binding post is such: see the structural representation reflecting binding post in accompanying drawing 5, figure.This figure is front view.Have one perpendicular to panel and have one end to be fixedly connected on the centered cylinder 21 of panel, the outside of centered cylinder 21 is also arranged with a cylinder 22, and centered cylinder 21 and cylinder 22 are all made up of conductor.So just appropriateness can increase the angle between resistance wire and elastomeric cords and the situation that is unlikely to cause resistance wire to be subject to less than pulling force.
Embodiment four
On the basis of embodiment one, two, three, rheostat also has a deficiency: introduced resistance wire 1 one end before and be fixedly connected with binding post 2 and be electrically connected, this termination terminal is named as " binding post being fixedly connected with resistance wire ".Be fixedly connected with a variety of mode, what usually adopt has two kinds: 1, with nut screwing clamping, and 2, welding.
Experiment finds, when slide rheostat employing divides by crimping time, and when being branch current between slide plate and " being fixedly connected with the binding post of resistance wire ", the resistance wire of this part easily disconnects.Unexpected this be! those skilled in the art should know, when slide rheostat adopts and divides by crimping, resistance wire is divided into two parts by slide plate, what a part was passed through is main line electric current, what a part was passed through is branch current, usually, should be that part that electric current is larger disconnects, why be that branch current part easily disconnects here? reason is such: the dynamics of slide plate compressing resistance wire is larger, main line demi-inflation is larger, and (it should be noted that: elastomeric cords buffering is not prevent resistance wire from expanding along with vibrations, vibrations neither be allowed to disappear, only with regard to vibrations, elastomeric cords is this vibrations of buffering), because the change of resistance wire length is by temperature electric current decision in other words, so, when there are vibrations in main line part, meeting tractive branched portion and slide plate, because branched portion does not cushion, again because branched portion and main line part are applied with very large pressure by slide plate, so, once slide plate is frustrated, branch road is just caused to be subject to a larger momentum and then to cause branched portion to disconnect.Again because branched portion also has electric current to pass through, branched portion also reaches red heat state, so, under a stretching force, easily disconnect.In other words, main line part constantly pulls slide plate, and slide plate is pulled once in a while, because slide plate compressing is very tight, the frustrating of slide plate is understood to branched portion time very short momentum, and main line part has buffering, so main line part is not broken, be that branched portion is broken on the contrary.
Experimenter has been following contrast experiment, and each group contrast experiment accomplishes that the problem except studying is different as far as possible, and other conditions are all identical.
Contrast experiment one.Difference is only not adopt slide plate in one group of experiment, and adopt a direct banding resistance wire of thin copper wire to replace the conducting function of slide plate, two groups of experimental provisions do not allow slide plate slide, find: adopt that group of the direct banding of thin copper wire to no longer include significantly " branch road disconnection " event, between the position of thin copper wire contact resistance silk and slide rail 8, thin copper wire relaxes, so, the slide plate that thin copper wire representative pressure is minimum, the slide plate namely can not frustrated.Resistance wire can shake back and forth with thin copper wire, and slide plate will have enough large intensity usually.
Contrast experiment two.Wherein set of device adopts the rheostat having slide plate, and another assembling and dismantling remove slide plate, after resistance wire energising work, live resistance wire with metal tweezers tweezer, and tweezers replace the conducting function of slide plate, along resistance wire place straight line weak vibrations tweezers, find, the disconnection of branched portion is more serious.
Contrast experiment three.In point by crimping, with dividing plate branched portion and main line spaced-apart, then, continue to blow a cold wind over to branched portion, intensity enough under making branched portion keep low temperature, finds, the probability that branched portion disconnects reduces greatly.Namely why not there is the reason of this problem in current limliting connection in this.
Contrast experiment four.One group of experiment of contrast experiment is design like this: the resistance of this rheostat as fixed resistance value is used, slide plate does not affect electric current, slide plate divide into two sections resistance wire, and one section is fixedly connected with binding post, called after first section, another section connects elastomeric cords, called after second section, although the first and second two sections of electric currents are identical, experiment finds, the first section being in red heat state easily disconnects.
Generally speaking, the immediate cause that branched portion easily disconnects is that slide plate is frustrated.Frustrating, is exactly violent one to move.
In order to study these technical problem Producing reason, experimenter had a lot of guess, did a lot of experiment, and the application has only announced out correct guess and corresponding contrast experiment.
Pressure between slide plate and resistance wire must be large, and little pressure just easily causes contact resistance excessive.So this problem is the technical issues that need to address.
In order to solve this technical problem, the present invention proposes following technical scheme: see accompanying drawing 6, is front view of the present invention.A kind of rheostat of anti-breaking resistance wire, comprise panel 5, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate 4 slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that: the equal close contact in two ends of resistance wire 1 and this end supporting and be the binding post 3 be electrically connected with this end, and the two ends of resistance wire 1 respectively connect one for tractive resistance wire, make resistance wire under tension elastomeric cords 3; Elastomeric cords 3 one end contact resistance silk 1, the other end is fixedly connected on panel 5.
Be provided with two elastomeric cords, just can well have solved the problem.In time adopting point by crimping, the elastomeric cords Main Function be connected with branch resistance silk is that buffer slip frustrates cause stressed, and the elastomeric cords be connected with main line resistance wire not only plays the effect that cushioning effect also will play noise reduction.
In this product, branched portion is easier than main line part to break, and this is the problem be found first, from this angle, finds that this problem is exactly creative.
These two elastomeric cords, with solving different technical problems, reach different technique effects.Rheostat can adopt the method for multiple connection binding post to realize point by crimping, and when adopting other to connect the method for binding post, the function of two springs is exchanged.
Embodiment five
In order to better allow resistance wire and binding post close contact, see accompanying drawing 7.Slide rheostat, comprise panel 5, resistance wire 1, the binding post 2 be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate 4 slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
The equal close contact in two ends of resistance wire 1 and this end supporting and be the binding post 2 be electrically connected with this end, and the two ends of resistance wire 1 respectively connect one for tractive resistance wire, make resistance wire under tension elastomeric cords 3;
Elastomeric cords 3 one end contact resistance silk, the other end is fixedly connected on panel 5,
And: elastomeric cords 3 is 30---60 degree with the angle of resistance wire 1.
Based on above-described embodiment, this embodiment no longer labor.
Embodiment six
There is this design of elastomeric cords 3, solve a lot of technical problem, but also bring new problem: panel has occurred spring, (what will study is not spring so just can not to give prominence to the problem that will study, but the effective resistance of resistance wire), elastomeric cords " can be hidden "? passable.See accompanying drawing 8, be vertical view, have panel 5 in figure, dig a hole 7 at panel 5, back side elastomeric cords 3 being set to panel 5 is just passable.The front of panel is the side having resistance wire, is the side showing student.
Described panel 5 is provided with a hole, and resistance wire 1 is arranged at the front of panel 5, and elastomeric cords 3 is arranged at the back side of panel 5.
Embodiment seven
Speak of in embodiment four " immediate cause that branched portion easily disconnects is that slide plate is frustrated ", except adopting the technical scheme described in embodiment four, also the technical scheme of embodiment seven (next will speak of the technical scheme of embodiment seven) can be adopted, or the scheme of existing embodiment four, also has the scheme of embodiment seven.
The scheme of embodiment seven is: see accompanying drawing 9, is front view, see accompanying drawing 10, is end view.The structure of described slide plate 4 is such: a kind of slide plate, comprises the sliding sleeve for sheathed slide rail 8, it is characterized in that:
There is the first arc silk 42 for contact resistance silk 1, also have the second arc silk 42 for contact resistance silk,
One end of first steel wire 41 is fixedly connected with and is electrically connected sliding sleeve 46, the other end of the first steel wire 41 is fixedly connected with and is electrically connected the first arc silk 42, one end of second steel wire 43 is fixedly connected with and is electrically connected sliding sleeve 46, the other end of the second steel wire 43 is fixedly connected with and is electrically connected the second arc silk 44
The tie point distance panel 5 of the first steel wire 41 and sliding sleeve 46 is comparatively near, and the tie point distance panel 5 of the second steel wire 43 and sliding sleeve is comparatively far away,
First arc silk 42 is comparatively far away apart from panel 5, and the second arc silk 44 is comparatively near apart from panel 5,
The shape of the first arc silk 42 is: the arc bending towards resistance wire 1 direction, and the shape of the second arc silk 44 is: the arc bending towards resistance wire 1 direction,
Between first steel wire 41 and the second steel wire 43, be provided with the spring 45 for strutting the first steel wire 41, second steel wire 43, the direction of spring 45 deformation is parallel with resistance wire 1.
Explain:
Have the first arc silk 42 for contact resistance silk 1, also have for the second arc silk 42 of contact resistance silk, that yes is in electrical contact in contact here, because need to allow these two arc silks and resistance wire form the path of electric current.
The other end of the first steel wire 41 is fixedly connected with and is electrically connected the first arc silk 42: the first arc silk 42 only has one end to be connected with the first steel wire 41, and the other end is vacant.The other end of the second steel wire 43 is fixedly connected with and is electrically connected the second arc silk 44, and the words is also so understood.
The tie point distance panel 5 of the first steel wire 41 and sliding sleeve 46 is comparatively near, and the tie point distance panel 5 of the second steel wire 43 and sliding sleeve is comparatively far away, and the first arc silk 42 is comparatively far away apart from panel 5, and the second arc silk 44 is nearer apart from panel 5.Although far, closely usually belong to unclear statement, when there being far and near contrast, far away, near just belonging to clearly states.
The shape of the first arc silk 42 is: the arc bending towards resistance wire 1 direction, and the shape of the second arc silk 44 is: the arc bending towards resistance wire 1 direction, its objective is that two arc silks roughly form a circle, and there is resistance wire 1 inside of circle.Structure is clear in order to make picture look for accompanying drawing 10, does not allow two arc silks touch resistance wire, and this is only used to allow picture show the shape knowing arc silk.Accompanying drawing 10 looks salubrious to make picture, does not draw spring 45.
Further explanation: steel wire be have flexible, so the first steel wire 41 and the second steel wire 43 can apply elastic force to corresponding arc silk, thus make arc silk closely to contact with resistance wire.Because there is spring 45, again because have the first steel wire and the second steel wire, so the possibility that slide plate 4 is frustrated reduces greatly.The technical scheme of the present embodiment, both can ensure slide plate and resistance wire good contact, can reduce again the possibility of frustrating, more reduce the possibility of frustrating in sliding process.
Slide plate described in embodiment seven also has a deficiency: slide plate 4 and resistance wire 1 contact position are not one, but two.Can solve like this: allow the first arc silk and the second arc flight lead from a little bit smaller, then, an opaque lid is set, cover in steel wire, arc silk is just passable.This is a demonstration equipment after all.Such design, both not obvious impact divided the effect of by crimping, did not also affect the effect of current limliting connection.
Embodiment of the present invention, resistance wire all adopts the heating wire in 50W external heated electric iron: take electric iron apart and just can take out the resistance wire be entangled on mica.
Embodiment eight
Each embodiment above-mentioned can combinationally use at zone of reasonableness.
Structure of the present invention is simple, solves the problems such as fracture of wire, vibrations, noise.
Claims (1)
1. a rheostat, comprise panel, resistance wire, the binding post be fixedly connected with perpendicular to panel and with panel, the slide rail that be arranged in parallel with resistance wire, slide rail is fixedly connected with panel, for the slide plate slided along slide rail, slide rail, resistance wire are all electrically connected with slide plate, it is characterized in that:
Resistance wire one end is fixedly connected with binding post and is electrically connected;
Resistance wire other end close contact and this end supporting and be the binding post be electrically connected with this end, and this one end of resistance wire connect one for tractive resistance wire, make resistance wire under tension elastomeric cords;
The other end of elastomeric cords is fixedly connected on panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410709537.5A CN104392814B (en) | 2014-11-29 | 2014-11-29 | A kind of rheostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410709537.5A CN104392814B (en) | 2014-11-29 | 2014-11-29 | A kind of rheostat |
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| CN104392814A true CN104392814A (en) | 2015-03-04 |
| CN104392814B CN104392814B (en) | 2018-11-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004881A (en) * | 2015-07-22 | 2015-10-28 | 王振环 | Wheatstone bridge-based human-body acceleration or power-generation capability comparing device |
| CN106762027A (en) * | 2016-12-29 | 2017-05-31 | 无锡盛邦电子有限公司 | A kind of automobile engine oil liquid level sensor structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03284803A (en) * | 1990-03-30 | 1991-12-16 | Matsushita Electric Ind Co Ltd | Sliding type variable resistor |
| CN201570161U (en) * | 2009-04-10 | 2010-09-01 | 王振环 | Luminous varistor |
| CN203109117U (en) * | 2012-12-28 | 2013-08-07 | 中国包装科研测试中心 | Resistance wire tensioning adjustment structure |
-
2014
- 2014-11-29 CN CN201410709537.5A patent/CN104392814B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03284803A (en) * | 1990-03-30 | 1991-12-16 | Matsushita Electric Ind Co Ltd | Sliding type variable resistor |
| CN201570161U (en) * | 2009-04-10 | 2010-09-01 | 王振环 | Luminous varistor |
| CN203109117U (en) * | 2012-12-28 | 2013-08-07 | 中国包装科研测试中心 | Resistance wire tensioning adjustment structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004881A (en) * | 2015-07-22 | 2015-10-28 | 王振环 | Wheatstone bridge-based human-body acceleration or power-generation capability comparing device |
| CN105004881B (en) * | 2015-07-22 | 2017-12-08 | 浙江恒胜消防设备有限公司 | Human body based on Wheatstone bridge accelerates or ability comparison means of having an effect |
| CN106762027A (en) * | 2016-12-29 | 2017-05-31 | 无锡盛邦电子有限公司 | A kind of automobile engine oil liquid level sensor structure |
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| Publication number | Publication date |
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| CN104392814B (en) | 2018-11-09 |
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