CN202929930U - Current effect demonstration apparatus - Google Patents
Current effect demonstration apparatus Download PDFInfo
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- CN202929930U CN202929930U CN 201220640806 CN201220640806U CN202929930U CN 202929930 U CN202929930 U CN 202929930U CN 201220640806 CN201220640806 CN 201220640806 CN 201220640806 U CN201220640806 U CN 201220640806U CN 202929930 U CN202929930 U CN 202929930U
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Abstract
Disclosed is a current effect demonstration apparatus, comprising a chemical effect demonstration unit connected with a power supply, a heat effect demonstration unit connected with the power supply, and a magnetic effect demonstration unit connected with the power supply, wherein the chemical effect demonstration unit, the heat effect demonstration unit, and the magnetic effect demonstration unit are connected in a parallelly connected manner. According to the technical scheme of the utility model, the chemical effect demonstration unit, the current heat effect demonstration unit, and the current magnetic effect demonstration unit of the current effect demonstration apparatus are parallelly connected with the power supply. Therefore, when a current effect experiment is carried out, the user just needs to connect the corresponding current effect demonstration unit with the power supplyt, thereby saving the trouble of connecting the corresponding experiment circuit while a current effect experiment is carried out and simplifying the complicated operation during the experiment process for students.
Description
Technical field
The utility model relates to the current technique field, is specifically related to a kind of apparatus for demonstrating of current effect.
Background technology
Just, in the process of senior middle school's study book knowledge, for make the student more deep understand book knowledge, arrange various experiments in teaching process, the student can be by doing experiment in order to clearly understand book knowledge in the laboratory.At present, relate to kinds of experiments in the books such as chemistry, physics, test comprising the electric current chemical effect, the heating effect of current experiment, the experiment of a plurality of relevant current effects such as magnetic effect of electric current experiment, at present in the laboratory, the student is before carrying out related experiment, must build a plurality of experimental circuits, in order to test accordingly, due to before carrying out each relevant experiment of current effect, the student must carry out the connection of each experimental circuit, just can test accordingly, cause the operation of student in carrying out experimentation more loaded down with trivial details.
The utility model content
In view of this, the utility model provides a kind of apparatus for demonstrating of current effect, before purpose is to solve and carries out each relevant experiment of current effect, the student must carry out the connection of each experimental circuit, just can carry out corresponding experiment, cause the more loaded down with trivial details problem of the operation of student in carrying out experimentation.
In order to address the above problem, the utility model provides a kind of current effect apparatus for demonstrating, and the concrete implementation procedure of described device is as follows:
A kind of apparatus for demonstrating of current effect comprises:
The chemical effect demonstration unit that is connected with power supply;
The thermal effect demonstration unit that is connected with described power supply;
The magnetic effect demonstration unit that is connected with described power supply;
Described chemical effect demonstration unit, described thermal effect demonstration unit and described magnetic effect demonstration unit adopt mode in parallel to be connected.
Preferably, described chemical effect demonstration unit comprises:
The first container of conducting solution is housed;
One end is connected with the positive pole of described power supply by the first switch, and an end stretches into the first electrode of described conducting solution;
One end is connected with the negative pole of described power supply, and an end stretches into the second electrode of described conducting solution.
Preferably, described thermal effect demonstration unit comprises:
One end is connected with the positive pole of described power supply by second switch, the heating wire that an end is connected with the negative pole of described power supply;
Come close to or in contact with mutually with described heating wire, the second container of solution is housed.
Preferably, described thermal effect demonstration unit also comprises:
It is inner that one end stretches into described solution, the thermometer of an end displays temperature numerical value.
Preferably, described thermal effect demonstration unit also comprises:
One end is connected with the positive pole of second source, and an end is connected with described second source negative pole by resistance, is used for measuring the thermistor of described solution temperature;
Adopt mode in parallel to be connected by the 3rd switch and described thermistor, be used for the hummer of reporting to the police when the temperature of described solution reaches certain numerical value.
Preferably, described magnetic effect demonstration unit comprises:
One end is connected with the positive pole of described power supply by the 4th switch, and an end is connected with the negative pole of described power supply, uses wire to press the magnet that certain orientation is wound around.
Preferably, described magnetic effect demonstration unit also comprises:
Iron plate, pointer and index dial.
Preferably, described chemical effect demonstration unit, described thermal effect demonstration unit and described magnetic effect demonstration unit are integrated in a chamber.
The utility model is with chemical effect demonstration unit, heating effect of current demonstration unit, the magnetic effect of electric current demonstration unit is connected with mode in parallel with power acquisition, when carrying out the experiment of current effect, only corresponding current effect demonstration unit need be switched on power, can test accordingly, thereby needn't before carrying out relevant current effect, corresponding experimental circuit be connected, solved the problem that the student carries out complex operation in experimentation.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of structural representation of the apparatus for demonstrating of the utility model current effect;
Fig. 2 is a kind of structural representation of chemical effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 3 is a kind of structural representation of thermal effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 4 is another structural representation of thermal effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 5 is a kind of structural representation of magnetic effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 6 is another structural representation in the apparatus for demonstrating of the utility model current effect;
Fig. 7 is a kind of schematic flow sheet of chemical effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 8 is a kind of experimental result schematic diagram of chemical effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Fig. 9 is another experimental result schematic diagram of chemical effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Figure 10 is a kind of schematic flow sheet of thermal effect demonstration unit in the apparatus for demonstrating of the utility model current effect;
Figure 11 is the schematic diagram that in the apparatus for demonstrating of the utility model current effect, the PTC thermistor of thermal effect demonstration unit varies with temperature report;
Figure 12 is a kind of schematic flow sheet of magnetic effect demonstration unit in the apparatus for demonstrating of the utility model current effect.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment of the present utility model provides a kind of apparatus for demonstrating of current effect, as shown in Figure 1, comprising:
The chemical effect demonstration unit 200 that is connected with power supply 100;
The thermal effect demonstration unit 300 that is connected with described power supply 100;
The magnetic effect demonstration unit 500 that is connected with described power supply 100;
Described chemical effect demonstration unit 200, described thermal effect demonstration unit 300 and described magnetic effect demonstration unit 500 adopt mode in parallel to be connected.
The utility model is with chemical effect demonstration unit, heating effect of current demonstration unit, the magnetic effect of electric current demonstration unit is connected with mode in parallel with power acquisition, when carrying out the experiment of current effect, only corresponding current effect demonstration unit need be switched on power, can test accordingly, thereby needn't before carrying out relevant current effect, corresponding experimental circuit be connected, solved the problem that the student carries out complex operation in experimentation.
Further, as shown in Figure 2, described chemical effect demonstration unit 200 comprises: the first container 201 that conducting solution is housed;
One end is connected with the positive pole of described power supply 100 by the first switch 202, and an end stretches into the first electrode 203 of described conducting solution;
One end is connected with the negative pole of described power supply 100, and an end stretches into the second electrode 204 of described conducting solution.
The manufacturing process of described chemical effect demonstration unit comprises:
Choose the container of the big or small 50x 30x60mm of being as the first container, at the paste outside iron plate of the first container, paste magnet in order to adsorb the first container on the demonstrator of device, inject conducting solution in the first container; The first electrode is connected with the positive pole of power supply by the first switch, the second electrode is connected with the negative pole of power supply, get iron staff and aluminium bar in the utility model embodiment as the first electrode in this device and the second electrode, the first electrode and the second electrode are put into the conducting solution of the first container.
The experimentation of described chemical effect demonstration unit comprises:
Closed the first switch is waited a moment, and just can be observed: negative electrode has Bubble formation, and under anode, the yellow green colloid produces, and along with the increase in reaction time, the amount of yellow green colloid increases gradually and yellow point occurs, and the phenomenons such as blackish green material appear, illustrate that electric current has chemical effect.
Further, as shown in Figure 3, described thermal effect demonstration unit 300 comprises:
One end is connected with the positive pole of described power supply 100 by second switch 301, the heating wire 302 that an end is connected with the negative pole of described power supply 100;
Come close to or in contact with mutually with described heating wire, the second container 303 of solution is housed.The manufacturing process of described heating effect of current demonstration unit comprises: the heating wire of getting a segment length 20-30mm, heating wire is fixed on the demonstrator of device with pad and screw, one end of heating wire is connected with positive source by second switch, the other end of heating wire is connected with power cathode, be screwed a U-shaped card above distance heating wire 100mm, the use U-shaped fastens the second container with solution.
The experimentation of described thermal effect demonstration unit comprises:
Closed second switch is waited a moment, and with holding the second container outer wall, the sensation of low-grade fever is arranged, and illustrates that electric current has thermal effect.
Further, described thermal effect demonstration unit also comprises:
It is inner that one end stretches into described solution, the thermometer of an end displays temperature numerical value.
Described thermometer comprises: WH6009I liquid crystal display electron thermometer.
The experimentation of described thermal effect demonstration unit also comprises:
The temperature-sensitive head of WH6009I type electronic thermometer is put into the solution of second container inside, can be seen that significantly on liquid crystal board, registration constantly rises, this explanation heating wire changes electric energy into heat energy, this shows, electric current has thermal effect.
Further, as shown in Figure 4, described thermal effect demonstration unit 300 also comprises:
One end is connected with the positive pole of second source 400, and an end is connected with described second source 400 negative poles by resistance, is used for measuring the thermistor 401 of described solution temperature;
Adopt mode in parallel to be connected by the 3rd switch 402 with described thermistor 401, be used for the hummer 403 of reporting to the police when the temperature of described solution reaches certain numerical value.
The manufacturing process of described heating effect of current demonstration unit also comprises: the solution of positive temperature coefficient (PTC) PTC thermistor being put into second container, one end of PTC thermistor is connected with the positive pole of second source, the other end of PTC thermistor is connected with the negative pole of second source by current-limiting resistance, hummer is connected with the 3rd switch, and the series circuit of hummer and the 3rd switch is connected in parallel to the two ends of PTC thermistor.
The experimentation of described thermal effect demonstration unit also comprises:
Thermistor is put into the solution of second container, closed the 3rd switch is waited a moment, and hummer pipes and provides warning function, illustrates that electric current has thermal effect.
Further, as shown in Figure 5, described magnetic effect demonstration unit 500 comprises:
One end is connected with the positive pole of described power supply by the 4th switch 501, and an end is connected with the negative pole of described power supply 100, uses wire to press the magnet 502 that certain orientation is wound around.
The manufacturing process of magnetic effect of electric current demonstration comprises: an end of wire is connected with the positive pole of described power supply by the 4th switch, and the other end of wire is connected to the negative pole of described power supply.
Further, as shown in Figure 5, described magnetic effect demonstration unit also comprises: iron plate 503, pointer 504 and index dial 505.
The manufacturing process of magnetic effect of electric current demonstration unit comprises: get a length and make pointer for the 140mm iron plate, separately get a long 40mm of being, wide is the 8mm iron plate, take T shape iron plate as example, middle fluting 4mm, wide 2mm in T shape iron plate lower end, be the wire one end concatenation pointer of 70mm, other end connection T shape iron plate with long, and pointer, T shape iron plate are fixed on the demonstrator of device.
The experimentation of described magnetic effect demonstration unit comprises:
When closed the 4th switch, just can be observed pointer obvious deflection occurs, illustrated that electric current has magnetic effect.
Further, described chemical effect demonstration unit, described thermal effect demonstration unit and described magnetic effect demonstration unit are integrated in a chamber, circuit diagram in described chamber is as shown in 6, in order to guarantee the security of this device, side of the positive electrode at described power supply 100 adds the 5th switch 601, so that when device produces fault, cut off the power supply of this device.
When the utility model carries out the experiment of each relevant current effect, needn't carry out the connection of each experimental circuit, the student only needs switch and the 5th switch of corresponding experiment are carried out the operation of open and close, just can test, the observation experiment phenomenon, this device is integrated in a chamber with each experiment equipment about electric current and is easy to carry, and is convenient to the student and carries out experimental implementation.
How the below's detailed description uses this device to carry out the various experiments of current effect.
This device can be divided into three different experiments: the experiment of electric current chemical effect, heating effect of current experiment, magnetic effect of electric current experiment, the below will describe respectively each experimental technique, and experiment effect.
One, electric current chemical experiment
The method of electric current chemical effect as shown in Figure 7, comprising:
Step S701: inject conducting solution in the first container;
Adopting distilled water in the present embodiment is experiment material, is injected in the first container.
Step S702: electrode and wire are connected;
In the present embodiment take electrode as iron staff, aluminium bar is example, supply voltage connects positive source take 6V as example with iron staff, namely uses iron staff to do anode, and aluminium bar is connected with power cathode, namely uses aluminium bar to do negative electrode.
Step S703: closed the first switch;
Closed the first switch with two electrodes, conducting solution and power turn-ons, is opened timer simultaneously.
Step S704: observe the reaction in container.
Wait a moment after Closing Switch and just can be observed: negative electrode has Bubble formation.
The principle of above-mentioned experimental phenomena: after iron staff and aluminium bar energising, at first iron staff is ionized as anode and is ion, be generally ferrous ion, near the water negative electrode is ionized to hydroxyl and hydrogen, and near the electrode reaction equation the first electrode and the second electrode is: negative electrode: 2H
++ 2e
-=H
2↑ iron is done anode: Fe-2e
-=Fe
2+
As shown in Figure 8, the supply voltage in above-mentioned experiment is changed, become successively 4V, 8V, 10V carry out above-mentioned experiment successively, and record experimental data.By experimental data as can be known, along with the change of supply voltage, the time of foaming is shorter and shorter, and foaming quantity is more and more, and hence one can see that, and the increase of voltage can make the speed of chemical reaction accelerate, and experiment effect is obvious.
As shown in Figure 9, change aqueous solution in said method into the NaCl aqueous solution, take supply voltage as example as 6V, the concentration of NaCl aqueous solution is replaced by 0.01g/ml, 0.02g/ml, 0.03g/ml successively carries out respectively above-mentioned experiment, and record experimental data.
Wait a moment after Closing Switch and just can be observed: negative electrode has Bubble formation, and under anode, the yellow green colloid produces, increase along with the reaction time, the amount of yellow green colloid increases gradually and yellow point occurs, and the phenomenons such as blackish green material appear, because the NaCl aqueous solution foaming time is very short, therefore the foaming time is not carried out record, only experimental phenomena is carried out record.
The principle of above-mentioned experimental phenomena: after iron staff and aluminium bar energising, at first iron staff is ionized as anode and is ion, be generally ferrous ion, near the water negative electrode is ionized to hydroxyl and hydrogen, so ferrous ion and hydroxyl form white Fe (OH) in water
2Precipitation, due near the lysed chlorine anode in distilled water solution, the ferrous hydroxide Fe (OH) of white
2Be deposited in and be oxidized to ferric hydroxide Fe (OH) in water
3, both mix by a certain percentage to form blackish green material.Sediment Fe (OH)
3Become at last iron oxide Fe in air with iron staff
2O
3Near the first electrode and the second electrode electrode reaction equation is: negative electrode: 2H
++ 2e
-=H
2↑ iron is done anode: Fe-2e
-=Fe
2+
By experimental data as can be known, along with the concentration increase of NaCl aqueous solution, experiment effect is more and more obvious, and experimental period is more and more faster, and because concentration increases, free electronics is more and more, makes experiment effect more obvious.
As shown in Figure 9, in said method, power supply is 6V, solution is the NaCl aqueous solution, with the electrode transposition, namely take iron staff as negative electrode, take aluminium bar as anode, and the concentration that will get the NaCl aqueous solution is that 0.01g/ml, 0.02g/ml, 0.03g/ml divide and carry out above-mentioned experiment three times, and records experimental phenomena.By experimental data as can be known, the difference of electrode causes experimental phenomena different.
To sum up, by above experimental data as can be known, along with the increase experiment effect of voltage is more and more obvious, the NaCl aqueous solution is more obvious than the experiment effect of distilled water, it is more obvious that the concentration of NaCl aqueous solution increases experiment effect, and the electrode difference causes experimental phenomena difference in experimentation.
Two, heating effect of current experiment
The method of heating effect of current as shown in figure 10, comprising:
Step S1001: inject solution in second container;
Distilled water or other solution are injected in second container.
Step S1002: closed second switch;
Closed second switch makes the heating wire conduction.
Step S1003: observation experiment phenomenon.
When the observation experiment phenomenon, can have but be not limited to following three kinds of modes:
Mode one: stroke the second container outer wall with hand, the sensation of low-grade fever is arranged, illustrate that electric current has thermal effect.
mode two: when observation realizes phenomenon, the temperature of solution in serviceability temperature instrumentation flow control two containers, concrete available WH6009I type liquid crystal display electron thermometer is measured, concrete, the temperature-sensitive head of WH6009I type electronic thermometer is put into the solution of second container inside, can see significantly that the numerical value of liquid crystal board representing temperature is in continuous rising, the temperature that solution is described constantly raises, this is because the heating wire of switching on has produced heat, heating wire changes electric energy into heat energy, this shows, electric current has thermal effect, adopting the liquid crystal display electron thermometer to carry out temperature in the utility model shows, the student is convenient to receive, teach through lively activities.
Mode three: when the observation experiment phenomenon, thermistor is put into the solution of second container, closed the 3rd switch, when the temperature of liquid in second container rises to uniform temperature, the hummer warning that will pipe, this is because of the rising of PTC thermistor along with fluid temperature in second container, resistance also raises gradually, and when the resistance of PTC thermistor reached certain numerical value, hummer piped, to provide prompting function, illustrate that electric current has thermal effect.
And can also further know the Changing Pattern of the resistance of thermistor variation with temperature by this experiment, mode two and the mode three of above-mentioned experiment are combined with, adopt WH6009I type liquid crystal display electron thermometer displays temperature, adopt multimeter to measure the resistance of thermistor, carry out at regular intervals Experiment Data Records one time, as shown in figure 11, be the resistance of thermistor in the described experiment experimental data along with temperature change.
By above experimental technique can be clear, the experiment of the demonstration thermal effect that understands, and watch in different ways experiment effect, experimental phenomena is obvious, and can be when observing heating effect of current, know the experimental data of thermistor, be more convenient for the student to carry out the thermal effect experiment.
Three, the magnetic effect of electric current experiment
The magnetic effect experimental technique of electric current, as shown in figure 12, the method comprises the following steps:
Step S1201: closed the 4th switch;
Closed the 4th switch is with wire and power turn-on.
Step S1202: observe the deflection of pointer.
By experimental data as can be known, when closed the 4th switch, just can be observed pointer obvious deflection occurs, this is because be subject to the effect of an attractive force near the iron plate of solenoid magnet, and then the drive pointer deflects, the solenoid of this description of test energising has produced magnetic force, has illustrated that electric current has magnetic effect.
above experimental technique is with the chemical effect experiment of electric current, the thermal effect experiment, the magnetic effect experiment is parallel in a chamber, just can complete the experiment of a plurality of relevant current effects in an experimental box, and when testing, only corresponding current effect demonstration unit need be switched on power, avoided a plurality of experimental circuits are connected, solve the student and carried out the loaded down with trivial details problem of experimental implementation, , and the subject that the utility model will be referred to the electric current experiment organically combines, the demonstration time is short, successful, allow the student for the effect of electric current, a whole image understanding can be arranged, and this demonstration device is drawn materials conveniently, make simple, experiment effect is obvious, facilitate again the teacher carry and use, be easy to apply in teaching process.
If the described function of the present embodiment method realizes with the form of SFU software functional unit and during as independently production marketing or use, can be stored in a computing equipment read/write memory medium.Based on such understanding, the part that the utility model embodiment contributes to prior art or the part of this technical scheme can embody with the form of software product, this software product is stored in a storage medium, comprise that some instructions are with so that a computing equipment (can be personal computer, server, mobile computing device or the network equipment etc.) carry out all or part of step of the described method of each embodiment of the utility model.And aforesaid storage medium comprises: the various media that can be program code stored such as USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, same or similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. the apparatus for demonstrating of a current effect, is characterized in that, comprising:
The chemical effect demonstration unit that is connected with power supply;
The thermal effect demonstration unit that is connected with described power supply;
The magnetic effect demonstration unit that is connected with described power supply;
Described chemical effect demonstration unit, described thermal effect demonstration unit and described magnetic effect demonstration unit adopt mode in parallel to be connected.
2. device as claimed in claim 1, is characterized in that, described chemical effect demonstration unit comprises:
The first container of conducting solution is housed;
One end is connected with the positive pole of described power supply by the first switch, and an end stretches into the first electrode of described conducting solution;
One end is connected with the negative pole of described power supply, and an end stretches into the second electrode of described conducting solution.
3. device as claimed in claim 1, is characterized in that, described thermal effect demonstration unit comprises:
One end is connected with the positive pole of described power supply by second switch, the heating wire that an end is connected with the negative pole of described power supply;
Come close to or in contact with mutually with described heating wire, the second container of solution is housed.
4. device as claimed in claim 3, is characterized in that, described thermal effect demonstration unit also comprises:
It is inner that one end stretches into described solution, the thermometer of an end displays temperature numerical value.
5. device as claimed in claim 3, is characterized in that, described thermal effect demonstration unit also comprises:
One end is connected with the positive pole of second source, and an end is connected with described second source negative pole by resistance, is used for measuring the thermistor of described solution temperature;
Adopt mode in parallel to be connected by the 3rd switch and described thermistor, be used for the hummer of reporting to the police when the temperature of described solution reaches certain numerical value.
6. device as claimed in claim 1, is characterized in that, described magnetic effect demonstration unit comprises:
One end is connected with the positive pole of described power supply by the 4th switch, and an end is connected with the negative pole of described power supply, uses wire to press the magnet that certain orientation is wound around.
7. device as claimed in claim 6, is characterized in that, described magnetic effect demonstration unit also comprises:
Iron plate, pointer and index dial.
8. device as claimed in claim 1, is characterized in that, described chemical effect demonstration unit, described thermal effect demonstration unit and described magnetic effect demonstration unit are integrated in a chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220640806 CN202929930U (en) | 2012-11-28 | 2012-11-28 | Current effect demonstration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220640806 CN202929930U (en) | 2012-11-28 | 2012-11-28 | Current effect demonstration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202929930U true CN202929930U (en) | 2013-05-08 |
Family
ID=48219868
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|---|---|---|---|
| CN 201220640806 Expired - Fee Related CN202929930U (en) | 2012-11-28 | 2012-11-28 | Current effect demonstration apparatus |
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|---|---|
| CN (1) | CN202929930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945636A (en) * | 2012-11-28 | 2013-02-27 | 苏以铭 | Presentation device for current effect |
-
2012
- 2012-11-28 CN CN 201220640806 patent/CN202929930U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945636A (en) * | 2012-11-28 | 2013-02-27 | 苏以铭 | Presentation device for current effect |
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Granted publication date: 20130508 Termination date: 20131128 |