CN213092617U - Current display type slide rheostat - Google Patents
Current display type slide rheostat Download PDFInfo
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- CN213092617U CN213092617U CN202022224216.XU CN202022224216U CN213092617U CN 213092617 U CN213092617 U CN 213092617U CN 202022224216 U CN202022224216 U CN 202022224216U CN 213092617 U CN213092617 U CN 213092617U
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- slide rheostat
- led lamp
- input line
- output line
- sliding sheet
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Abstract
The utility model discloses a flow display type slide rheostat, which comprises a slide rheostat, wherein a LED lamp belt is also wound outside the PVC pipe of the slide rheostat, the LED lamp belt comprises an input line and an output line, a plurality of LED lamps are connected in parallel between the input line and the output line, and the head end of the input line and the tail end of the output line are respectively connected with two lower connecting posts; on the output line, the LED lamps with the same number at uniform intervals are provided with one-way conduction contacts, each one-way conduction contact comprises a sliding sheet contact and a first rectifier diode, the anode of each first rectifier diode is connected with the sliding sheet contact, and the sliding sheet of the slide rheostat can be sequentially connected with the sliding sheet contact when sliding on the metal rod. The utility model discloses highly restore slide rheostat's theory of operation, abundant, the change of the route of flowing through and resistance size of complete demonstration electric current.
Description
Technical Field
The utility model relates to a laboratory glassware field of physics or electricity experiment especially relates to a show STREAMING slide rheostat.
Background
The "sliding rheostat" is the most basic component in the physical electricity in the beginning, and has a very important position in the electricity. The importance of the status lies in that: the knowledge of the sliding rheostat directly influences the study of important knowledge such as follow-up 'exploration of the relation between current and voltage and resistance', 'ohm law', 'measurement of resistance' and 'measurement of electric power', and has great influence on electricity of junior high schools and even high schools. The study of the slide rheostat is in a class (teaching version) of 'rheostat' in the sixteenth chapter of nine grades, and in teaching, the fact that a student cannot understand the principle of the slide rheostat due to invisible current is obviously that the student doubtful the effective resistance, makes no doubt about which part of resistance lines have current passing through, and cannot understand how the effective resistance changes after the sliding sheet moves.
In order to solve the problem that current cannot be seen in teaching and help students to understand from image thinking, many teachers self-make sliding rheostat models, but the existing self-made sliding rheostat teaching aids cannot vividly and visually show current flowing and resistance change.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a current display type slide rheostat.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a current display type slide rheostat comprises a slide rheostat body, wherein an LED lamp strip is wound outside a PVC pipe of the slide rheostat body and comprises an input line and an output line, a plurality of LED lamps are connected between the input line and the output line in parallel, and the head end of the input line and the tail end of the output line are respectively connected with two lower connecting posts; on the output line, the LED lamps with the same number at uniform intervals are provided with one-way conduction contacts, each one-way conduction contact comprises a sliding sheet contact and a first rectifier diode, the anode of each first rectifier diode is connected with the sliding sheet contact, and the sliding sheet of the slide rheostat can be sequentially connected with the sliding sheet contact when sliding on the metal rod.
Preferably, the number of the LED lamp belts is two, and the two LED lamp belts are wound on the PVC pipe in parallel; the input line head ends of two LED lamp areas are connected with two lower wiring posts respectively, the tail ends of the output lines of the two LED lamp areas are provided with anti-shunt diodes respectively, and the negative pole of the anti-shunt diode of each LED lamp area is connected with the input line head end of the other LED lamp area.
Preferably, the number of the one-way conduction contacts is 8 to 20.
Compared with the prior art, the utility model beneficial effect be:
1) the utility model discloses highly restore slide rheostat's theory of operation, abundant, the change of the route of flowing through and resistance size of complete demonstration electric current.
2) The utility model discloses two lower terminal posts can insert the power positive pole alone, also can insert the power positive pole simultaneously.
The invention is further described with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic overall structure diagram of the preferred embodiment of the present invention;
fig. 2 is the circuit structure schematic diagram of the preferred embodiment of the present invention, i.e. the LED lamp strip.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and explained with reference to the specific embodiments.
As shown in fig. 1 and 2, a current display type sliding rheostat comprises a sliding rheostat 1, wherein a PVC pipe of the sliding rheostat 1 is also wrapped with an LED lamp strip 2, the LED lamp strip 2 comprises an input line 3 and an output line 4, a plurality of LED lamps 5 are connected in parallel between the input line 3 and the output line 4, and the head end of the input line 3 and the tail end of the output line 4 are respectively connected with two lower connecting posts 6; on the output line 4, the LED lamps 5 with the same number at uniform intervals are provided with one-way conduction contacts 7, each one-way conduction contact 7 comprises a sliding sheet contact 8 and a first rectifying diode 9, the positive electrode of each first rectifying diode 9 is connected with the sliding sheet contact 8, and a sliding sheet 10 of the slide rheostat 1 can be sequentially connected with the sliding sheet contact 10 when sliding on a metal rod 11.
Preferably, two LED lamp belts 2 are arranged, and the two LED lamp belts 2 are wound on the PVC pipe in parallel; two lower wiring posts 6 are connected respectively to the 3 head ends of input line in two LED lamp areas 2, and the tail end of the output line 4 in two LED lamp areas 2 is equipped with anti-shunting diode 13 respectively, and the head end of the input line 3 in another LED lamp area 2 is connected to the negative pole of the anti-shunting diode 13 in every LED lamp area 2.
Further, the number of the unidirectional conductive contacts 7 is 8 to 20.
The utility model discloses preferred embodiment's theory of operation as follows:
when the positive electrode of the battery is connected to the lower wiring post 6 on the left side, the sliding piece 10 is connected to the sliding piece contact 8 in the one-way conduction contact 7 on one group of LED strips 2, as shown in any point A, B, C, F, E or D in fig. 2, when any point in the connection A, B, C is connected, a path is formed on the left side of the point, the LED strip 2 on the corresponding part on the path is lighted, that is, the left LED strip 2 on the connection point is lighted, and the right LED strip 2 is broken due to the action of the first rectifying diode 9 and cannot be lighted. When the LED strip 2 is connected to F, E or D, the LED strip 2 is not lit due to the anti-shunt diode 13.
When the positive electrode of the battery is connected to the lower terminal post 6 on the right side, the principle is not described in detail.
To avoid burning out the circuit, the two lower connector posts 6 can only be connected to the positive pole of the power supply.
When the two lower wiring posts 6 are simultaneously connected with the anode of the power supply, the LED lamp strips 2 at the corresponding parts on the current path are all lightened.
The above embodiment fully restores and demonstrates the working principle of the sliding rheostat, and fully and completely displays the flowing path of the current and the change of the resistance magnitude.
The technical content of the present invention is further described by the above embodiments only, so that the reader can understand the technical content more easily, but the embodiments of the present invention are not limited thereto, wherein the local structure and the connection mode of each component can be adjusted to some extent according to the actual situation, and any technical extension or re-creation according to the present invention is protected by the present invention.
Claims (3)
1. A current display type slide rheostat comprises a slide rheostat body and is characterized in that an LED lamp strip is further wound outside a PVC pipe of the slide rheostat body, the LED lamp strip comprises an input line and an output line, a plurality of LED lamps are connected between the input line and the output line in parallel, and the head end of the input line and the tail end of the output line are respectively connected with two lower connecting posts; on the output line, the LED lamps with the same number at uniform intervals are provided with one-way conduction contacts, each one-way conduction contact comprises a sliding sheet contact and a first rectifier diode, the anode of each first rectifier diode is connected with the sliding sheet contact, and the sliding sheet of the slide rheostat can be sequentially connected with the sliding sheet contact when sliding on the metal rod.
2. The current-displaying slide rheostat according to claim 1, wherein the number of the LED strips is two, and the two LED strips are wound on the PVC pipe in parallel; the input line head ends of two LED lamp areas are connected with two lower wiring posts respectively, the tail ends of the output lines of the two LED lamp areas are provided with anti-shunt diodes respectively, and the negative pole of the anti-shunt diode of each LED lamp area is connected with the input line head end of the other LED lamp area.
3. The explicit sliding varistor of claim 1, wherein the number of said one-way contacts is 8 to 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022224216.XU CN213092617U (en) | 2020-10-03 | 2020-10-03 | Current display type slide rheostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022224216.XU CN213092617U (en) | 2020-10-03 | 2020-10-03 | Current display type slide rheostat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213092617U true CN213092617U (en) | 2021-04-30 |
Family
ID=75613097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022224216.XU Active CN213092617U (en) | 2020-10-03 | 2020-10-03 | Current display type slide rheostat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213092617U (en) |
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2020
- 2020-10-03 CN CN202022224216.XU patent/CN213092617U/en active Active
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