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CN-224232267-U - Slide rheostat teaching aid

CN224232267UCN 224232267 UCN224232267 UCN 224232267UCN-224232267-U

Abstract

The utility model relates to the technical field of teaching equipment, in particular to a slide rheostat teaching aid which comprises a slide rheostat model, an external circuit and an internal circuit, wherein the slide rheostat model comprises a base, a bracket, a cylinder, a metal rod, an A terminal, a B terminal, a C terminal, a D terminal, a programmable LED lamp strip, a strip-shaped groove plate and a resistance wire, the external circuit comprises a dry battery, a switch and an external wire, the internal circuit comprises a detection module, a control module and a power supply module, and the detection module is electrically connected with the A terminal, the B terminal, the C terminal, the D terminal, the left end of the resistance wire, the right end of the resistance wire and the metal rod through the wires.

Inventors

  • ZHU YONGHE
  • WU JIAJIAN
  • Xie Shehong
  • LIU AIHONG
  • SHAO XIAOFENG

Assignees

  • 盐城市鹿鸣路初级中学

Dates

Publication Date
20260512
Application Date
20250207

Claims (6)

  1. 1. A slide rheostat teaching aid is characterized by comprising a slide rheostat model (100), an external circuit (200) and an internal circuit (300), The sliding rheostat model (100) comprises a base (101), a bracket (102), a cylinder (103), a metal rod (104), a sliding sheet (105), a programmable LED lamp strip (106), a strip-shaped groove plate (107), a resistance wire (108), an A terminal (109), a B terminal (110), a C terminal (111) and a D terminal (112); The base (101) is used for supporting the slide rheostat and hiding the internal circuit (300); Two brackets (102) are arranged and are arranged above the base (101); the cylinder (103) is arranged between the two brackets (102) and is used for simulating the porcelain bushing of the sliding rheostat; The programmable LED lamp strip (106) is spirally wound on the cylinder (103); the metal rod (104) is arranged between the two brackets (102) and is positioned above the cylinder (103); the sliding sheet (105) is in sliding electrical connection with the metal rod (104); The strip-shaped groove plate (107) is arranged below the metal rod (104) and above the cylinder (103); The resistance wire (108) is placed in the strip-shaped groove plate (107) and is electrically connected with the lower end of the sliding sheet (105) in a sliding manner; The A terminal (109) is positioned near the left side of the programmable LED lamp strip (106); The B terminal (110) is positioned near the right side of the programmable LED lamp strip (106); the C terminal (111) is positioned near the left end of the metal rod (104); the D terminal (112) is positioned near the right end of the metal rod (104); The external circuit (200) comprises a dry battery (201), a switch (202) and an external wire (203), wherein the external circuit (200) can be connected to any two ends of an A terminal (109), a B terminal (110), a C terminal (111) and a D terminal (112) through the external wire (203); The internal circuit (300) comprises a detection module (301), a control module (302) and a power module (303), wherein the detection module (301) is electrically connected with the A wiring end (109), the B wiring end (110), the C wiring end (111), the D wiring end (112), the left end of the resistance wire (108), the right end of the resistance wire (108) and the metal rod (104) through wires and used for detecting seven potentials, the control module (302) can control whether the programmable LED lamp strip (106) is lighted or not and the lighting area according to the seven potentials, the power module (303) is used for providing electric energy for the detection module (301), the control module (302) and the programmable LED lamp strip (106), and two ends of the resistance wire (108) are electrically connected with the power module (303).
  2. 2. A slide rheostat teaching aid according to claim 1 and characterized in that the detection module (301) and the wires connected with the A terminal (109), the B terminal (110), the C terminal (111), the D terminal (112), the left end of the resistance wire (108), the right end of the resistance wire (108) and the metal rod (104) are hidden in the two brackets (102).
  3. 3. A slide rheostat teaching aid according to claim 2 and characterized in that the bracket (102) is made of non-transparent materials.
  4. 4. A slide rheostat teaching aid according to claim 1 and characterized in that the length of the resistance wire (108) is consistent with the axial length of the spiral programmable LED light strip (106) and the horizontal positions are aligned.
  5. 5. A slide rheostat teaching aid according to claim 1 and characterized in that the power supply module (303) uses DC power.
  6. 6. A slide rheostat teaching aid according to claim 1 characterized in that the external circuitry (200) and the internal circuitry (300) are commonly connected.

Description

Slide rheostat teaching aid Technical Field The utility model relates to the technical field of teaching equipment, in particular to a slide rheostat teaching aid. Background The sliding rheostat is used as a key circuit component and has the function of effectively controlling the operation state of a circuit by adjusting the self resistance value. In the educational and teaching scene, when a teacher tries to explain the working principle of the slide rheostat and the correct connection method thereof, if the slide rheostat is only demonstrated by a real object, an ideal visual effect is difficult to achieve, and particularly, the detail observation is difficult for students in the rear row of a classroom. The prior art has improved this, replace the traditional resistance wire with a series of resistor strings and a plurality of LED lamp combinations, these resistor strings and LED lamp are arranged in series alternately, wherein the resistor string is formed by a plurality of small-size resistance in series in proper order, and the sheetmetal is kept sliding contact with these small-size resistance. Through such design, in the teaching demonstration process, students can understand the change condition of the resistor better by observing the visual expression of the brightness of the LED lamp along with the change of the resistor, thereby remarkably improving the observation effect and being beneficial to the teaching activities. However, this method also has a limitation that the number of LED lamps is limited, and the working mechanism of the resistance wire and the flowing state of the current therebetween cannot be fully shown. If an attempt is made to increase the number of LED lamps to enhance the display effect, another challenge is faced in that it is difficult for a general dry battery to provide enough power to drive a large number of LED lamps to emit light at the same time. In practical teaching environment, dry battery is the first choice power source for showing the circuit connection principle, so how to drive more LED lamps by using dry battery circuit without sacrificing the intuitiveness of the power source, thereby realizing richer and vivid teaching content display and becoming a technical problem to be solved urgently. Disclosure of utility model The utility model solves the problems that in the prior art, the number of LED lamps is limited, the working mechanism of a resistance wire and the flowing state of current in the resistance wire cannot be comprehensively displayed, and a slide rheostat teaching experiment is not visual enough, so that the slide rheostat teaching aid is provided. The utility model is realized by the following technical proposal, the slide rheostat teaching aid comprises a slide rheostat model, an external circuit and an internal circuit, The sliding rheostat model comprises a base, a bracket, a cylinder, a metal rod, a sliding sheet, an A wiring terminal, a B wiring terminal, a C wiring terminal, a D wiring terminal, a programmable LED lamp strip, a strip-shaped groove plate and a resistance wire; the base is used for supporting the slide rheostat and hiding an internal circuit; The two brackets are arranged and are arranged above the base; The cylinder is arranged between the two brackets and is used for simulating the porcelain bushing of the sliding rheostat; The programmable LED lamp strip is spirally wound on the cylinder; the metal rod is arranged between the two brackets and is positioned above the cylinder; The sliding sheet is electrically connected with the metal rod in a sliding way; The strip-shaped groove plate is arranged below the metal rod and above the cylinder; the resistance wire is placed in the strip-shaped groove plate and is electrically connected with the lower end of the sliding sheet in a sliding manner; The A terminal is positioned near the left side of the programmable LED lamp strip; the B wiring terminal is positioned near the right side of the programmable LED lamp strip; The C terminal is positioned near the left end of the metal rod; the D terminal is positioned near the right end of the metal rod; the external circuit comprises a dry battery, a switch and an external wire, and can be connected to any two ends of an A terminal, a B terminal, a C terminal and a D terminal through the external wire; The internal circuit comprises a detection module, a control module and a power supply module, wherein the detection module is electrically connected with an A wiring end, a B wiring end, a C wiring end, a D wiring end, a resistance wire left end, a resistance wire right end and a metal rod through wires and used for detecting the seven potentials, the control module can control whether the programmable LED lamp strip is lighted or not and a lighting area according to the seven potential information, and the power supply module is used for providing electric energy for the detection module, the control module and the programmable L