A sliding resistor

Abstract

The utility model discloses a sliding rheostat, comprising a side support, the outer surface of the side support is penetrated by a fixed transverse rod, the outer surface of one end of the side support away from the fixed transverse rod is penetrated by a sliding rod, the outer surface of the sliding rod is penetrated by a sliding shift plate, and a resistance display mechanism is arranged between the curved connecting line and the sliding rod, through which the working principle of the sliding rheostat can be intuitively understood after power is turned on, and the current path of the outer surface of the fixed transverse rod is visualized. The sliding rheostat is powered by a driving power supply, so that the current passes through the line to power the screw-in bulb, so that a path is formed between the annular conductive sheet and the stainless steel throat clamp, and the number of the screw-in bulbs is increased or decreased by sliding the sliding shift plate, so that the screw-in bulbs through which the current flows are lit, and the dual visualization of the current path of the effective resistance part, the sliding rod and the sliding shift plate is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sliding rheostats for teaching, in particular to a sliding rheostat. Background Art

[0002] In school teaching experiments, in order to enable students to better understand current and resistance, teaching aids are usually used to let students conduct experiments to achieve a deeper impression. However, for existing sliding rheostats, the brightness of the LED light of the sliding rheostat does not change significantly with the change of effective resistance, which makes students mistakenly believe that the magnitude of the current in the circuit has not changed, causing misunderstandings among students. At the same time, when the sliding rheostat is in use, the effective resistance and the path through which the current passes are usually not easy to observe, and the complete current path cannot be visualized, which is not conducive to students' in-depth understanding of the working principle of the sliding rheostat. Utility Model Content

[0003] The utility model aims to provide a sliding rheostat to solve the problem in the above background technology that the current path cannot be visualized, which is not conducive to students' understanding.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sliding rheostat, comprising a side support, the outer surface of the side support is penetrated by a fixed transverse rod, and the outer surface of the fixed transverse rod is inlaid with a curved connecting line, and the curved connecting line is designed in a spring shape, a sliding rod is penetrated and installed on the outer surface of one end of the side support away from the fixed transverse rod, and both ends of the sliding rod penetrate the side support, and a driving power supply is arranged at one end of the side support, a sliding shift plate is penetrated and installed on the outer surface of the sliding rod, and the sliding shift plate and the sliding rod are slidably connected, a resistance display mechanism is arranged between the curved connecting line and the sliding rod, and the resistance display mechanism allows the working principle of the sliding rheostat to be intuitively understood after power is turned on, and the current path on the outer surface of the fixed transverse rod can be visualized.

[0005] Preferably, the resistance display mechanism includes: a lamp holder, which is fixedly mounted on the outer surface of the fixed transverse rod, and the curved connecting line on the outer surface of the fixed transverse rod is respectively connected to the two ends of the lamp holder, a screw-in bulb is installed on the internal thread of the lamp holder, and the lamp holder is fixedly mounted on the outer surface of the sliding rod, and the lamp holders are connected in series with each other.

[0006] By adopting the above technical scheme, it is possible to control whether the screw-in bulbs on the outer surface of the sliding rod and the fixed transverse rod are lit through the sliding shift plate. The current path through the circuit can be visualized through the series connection of the screw-in bulbs, and the changes in the current size can be effectively observed through the brightness of the screw-in bulbs. At the same time, students can better understand the differences and connections between the wiring methods of the sliding rheostat.

[0007] Preferably, the outer surface of the fixed transverse rod is adhered with a double-conductor copper foil tape, and one end of the double-conductor copper foil tape is connected to the outer surface of the curved connecting line, and the double-conductor copper foil tapes between the curved connecting lines are not connected to each other.

[0008] By adopting the above technical solution, the continuity of the current during the sliding of the sliding shift plate can be ensured, so that the screw-in bulb can emit light continuously.

[0009] Preferably, a contact connection mechanism is provided between the sliding rod and the fixed transverse rod, and the circuits can be flexibly changed through the contact connection mechanism.

[0010] By adopting the above technical solution, the position of the sliding shift plate can be changed to control the increase or decrease of the screw-in bulbs energized on the curved connecting wire and the sliding rod, and the current size in the circuit can be observed.

[0011] Preferably, the contact connection mechanism includes: a first contact aluminum foil sheet, which is fixedly mounted on the outer surface of the sliding shift plate close to the fixed transverse rod, and a second contact aluminum foil sheet is fixedly mounted on the outer surface of the sliding shift plate, and a lamp holder is connected between the second contact aluminum foil sheet and the first contact aluminum foil sheet, one end of the second contact aluminum foil sheet is embedded in the interior of the sliding shift plate, the second contact aluminum foil sheet is in the shape of an arc, and the second contact aluminum foil sheet is in contact with the side surface of the sliding rod.

[0012] By adopting the above technical solution, the sliding shift plate can be moved on the sliding rod, and at the same time, the current passing through the first contact aluminum foil sheet and the second contact aluminum foil sheet can be observed through the screw-in bulb, connecting the circuit between the curved connecting wire and the annular conductive sheet, and visualizing the current path of the sliding shift plate.

[0013] Preferably, electric clamping rings are fixedly installed at both ends of the sliding rod, and a section of the sliding rod located between the side supports is embedded with an annular conductive sheet, and the annular conductive sheet is connected to one end of the lamp holder, one end of the lamp holder is connected to the other lamp holder by a wire, and every two annular conductive sheets are connected to each other, and a connecting aluminum foil sheet is embedded with the outer surface of the sliding rod, and the connecting aluminum foil sheets are respectively connected to the electric clamping rings, and the connecting aluminum foil sheet is connected to the annular conductive sheet close to one end of the side support.

[0014] By adopting the above technical scheme, current can be input or output through the clamping ring, so that the current enters the lamp holder along the connecting aluminum foil to light the screw-in bulb, and then goes from the lamp holder to the annular conductive sheet. Through the series connection of the lamp holders, the screw-in bulbs can be lit together. Due to the characteristics of the screw-in bulb, more screw-in bulbs can be connected in series during movement, and the size of the current in the sliding rheostat circuit can be observed through the brightness of the screw-in bulbs, and the current path of the sliding rod can be visualized at the same time.

[0015] Preferably, stainless steel throat clamps are fixedly installed on both ends of the fixed transverse rod, and the side surfaces of the stainless steel throat clamps are respectively connected to the two ends of the curved connecting line, and the outer surface of the driving power supply is connected to an alligator clip, and the alligator clip can contact the stainless steel throat clamp and the clamping ring respectively.

[0016] By adopting the above technical solution, different line directions can be matched by clamping the alligator clip on the clamp ring and the stainless steel hose clamp to observe the differences between different wiring methods.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the sliding rheostat:

[0018] 1. Clamp the alligator clips on the outer surface of the stainless steel throat hoop and the clamping ring respectively, and then supply power through the driving power supply, so that the current passes through the line to supply power to the screw-in bulb, and the annular conductive sheet and the lamp holder wire are connected in series, and then the current is transmitted to the curved connecting wire through the first contact aluminum foil and the second contact aluminum foil to form a path when entering the stainless steel throat hoop. The number of screw-in bulbs is increased or decreased by sliding the sliding shift plate, so that the screw-in bulbs through which the current flows are lit, and the dual visualization of the effective resistance part, the sliding rod and the current path of the sliding shift plate is realized. While observing the effective resistance, it can help students better understand the difference between the wiring methods of the sliding rheostat;

[0019] 2. Through the series connection between the lamp holders, the current can be judged by observing the change in brightness of the screw-type bulbs when the current passes through and the number of screw-type bulbs increases. This simplifies the working principle. At the same time, when a single screw-type bulb in the circuit is damaged, the screw-type bulb can also be replaced separately, which is conducive to the later maintenance of the sliding rheostat.

[0020] 3. By setting the double-conducting copper foil tape on the outer surface of the fixed transverse rod, the first contact aluminum foil can be always connected with the curved connecting line during the movement of the sliding shift plate, so as to realize the continuity of the current during the sliding of the sliding shift plate, so that students can observe the continuous change of the current and the screw-in bulb can continue to emit light. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the side support and the driving power supply of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the fixed transverse rod and the stainless steel throat hoop of the utility model;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the sliding displacement plate and the second contact aluminum foil sheet of the utility model;

[0024] Figure 4This is a schematic diagram of the three-dimensional structure of the utility model connecting the aluminum foil sheet, the annular conductive sheet and the wire;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the curved connecting wire and the double-conductor copper foil tape of the utility model;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the stainless steel throat clamp and the crocodile explosion of the utility model.

[0027] In the figure: 1. Side support; 2. Fixed transverse rod; 3. Stainless steel throat clamp; 4. Bent connecting wire; 5. Lamp holder; 6. Screw-in bulb; 7. Sliding rod; 8. Sliding shift plate; 9. First contact aluminum foil; 10. Second contact aluminum foil; 11. Double-conducting copper foil tape; 12. Connecting aluminum foil; 13. Ring-shaped conductive sheet; 14. Wire; 15. Electric clamp ring; 16. Driving power supply; 17. Alligator clip. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 The utility model provides a technical solution: a sliding rheostat, including a lateral support 1, the outer surface of the lateral support 1 is penetrated by a fixed transverse rod 2, and the outer surface of the fixed transverse rod 2 is inlaid with a curved connecting line 4, and the curved connecting line 4 is a spring-shaped design, a sliding rod 7 is penetrated and installed on the outer surface of one end of the lateral support 1 away from the fixed transverse rod 2, and both ends of the sliding rod 7 penetrate the lateral support 1, and a driving power supply 16 is provided at one end of the lateral support 1, a sliding shift plate 8 is penetrated and installed on the outer surface of the sliding rod 7, and the sliding shift plate 8 is slidably connected to the sliding rod 7.

[0030] When the sliding rheostat is used, the crocodile clip 17 needs to be clamped on the outer surfaces of the stainless steel throat clamp 3 and the clamping ring 15 respectively, and then powered by the driving power supply 16 .

[0031] A resistance display mechanism is arranged between the curved connecting wire 4 and the sliding rod 7. Through the resistance display mechanism, the working principle of the sliding rheostat can be intuitively understood after power is turned on, and the current path on the outer surface of the fixed transverse rod 2 can be visualized. The resistance display mechanism includes: a lamp holder 5, the lamp holder 5 is fixedly installed on the outer surface of the fixed transverse rod 2, and the curved connecting wire 4 on the outer surface of the fixed transverse rod 2 is respectively connected to the two ends of the lamp holder 5, a screw-type bulb 6 is installed on the internal thread of the lamp holder 5, and the lamp holder 5 is fixedly installed on the outer surface of the sliding rod 7, and the lamp holders 5 are connected in series with each other.

[0032] When the current is conducted to the outer surface of the curved connecting wire 4 through the first contact aluminum foil 9, a passage will be formed between the stainless steel throat clamp 3, so that the screw-type bulb 6 on the outer surface of the fixed transverse rod 2 will be lit, making it convenient to observe the current direction on the outer surface of the fixed transverse rod 2.

[0033] The outer surface of the fixed transverse rod 2 is adhered with a double-conductor copper foil tape 11, and one end of the double-conductor copper foil tape 11 is connected to the outer surface of the curved connecting line 4, and the double-conductor copper foil tapes 11 between the curved connecting lines 4 are not connected to each other.

[0034] The double-conducting copper foil tape 11 can make the sliding shift plate 8 move while the current always passes through the curved connecting wire 4, so that the current of the sliding shift plate 8 is always connected to the curved connecting wire 4 during the movement. Through the series connection of the lamp holder 5, students can observe the continuous glow of the screw-in bulb 6 and judge the size of the current in the circuit by observing the brightness of the screw-in bulb 6.

[0035] A contact connection mechanism is provided between the sliding rod 7 and the fixed transverse rod 2, through which the circuits can be flexibly changed. The contact connection mechanism includes: a first contact aluminum foil sheet 9, which is fixedly mounted on the outer surface of the sliding shift plate 8 close to the fixed transverse rod 2, and a second contact aluminum foil sheet 10 is fixedly mounted on the outer surface of the sliding shift plate 8, and a lamp holder 5 is connected between the second contact aluminum foil sheet 10 and the first contact aluminum foil sheet 9, one end of the second contact aluminum foil sheet 10 is embedded in the interior of the sliding shift plate 8, the shape of the second contact aluminum foil sheet 10 is arc-shaped, and the second contact aluminum foil sheet 10 is in contact with the side surface of the sliding rod 7.

[0036] By moving the sliding shift plate 8, the sliding shift plate 8 slides on the outer surface of the sliding rod 7, so that the current can be transmitted to the second contact aluminum foil 10 through the annular conductive sheet 13, and then transmitted to the first contact aluminum foil 9 through the second contact aluminum foil 10, and the current is transmitted to the curved connecting wire 4, and the screw-in bulb 6 is lit at the same time, so that the current can be observed when passing through the moving sliding shift plate 8.

[0037] Electric clamping rings 15 are fixedly installed at both ends of the sliding rod 7, and a section of the sliding rod 7 located between the side supports 1 is embedded with an annular conductive sheet 13, and the annular conductive sheet 13 is connected to one end of the lamp holder 5, and one end of the lamp holder 5 is connected to the other lamp holder 5 by a wire 14, and every two annular conductive sheets 13 are connected to each other, and a connecting aluminum foil sheet 12 is embedded on the outer surface of the sliding rod 7, and the connecting aluminum foil sheets 12 are respectively connected to the electric clamping rings 15, and the connecting aluminum foil sheet 12 is connected to the annular conductive sheet 13 near one end of the side support 1.

[0038] The current is conducted to the connecting aluminum foil 12 through the clamping ring 15, and then sent to the annular conductive sheet 13 by the connecting aluminum foil 12, and the screw-in bulb 6 is lit through the lamp holder 5, and then conducted to the next lamp holder 5 by the wire 14, so that the current passing path of the sliding rod 7 can be visualized, and then the current is conducted to the curved connecting line 4 through the first contact aluminum foil 9 and the second contact aluminum foil 10, and then transmitted back from the stainless steel throat clamp 3 to the driving power supply 16 to form a path. By moving the sliding shift plate 8, the number of current passing through the screw-in bulbs 6 is increased or decreased. When the number of screw-in bulbs 6 increases, the brightness of the screw-in bulbs 6 will decrease, so that the current size in the sliding rheostat can be visualized.

[0039] Stainless steel throat clamps 3 are fixedly installed at both ends of the fixed transverse rod 2, and the side surfaces of the stainless steel throat clamps 3 are respectively connected to the two ends of the curved connecting line 4, and the outer surface of the driving power supply 16 is connected to an alligator clip 17, and the alligator clip 17 can contact the stainless steel throat clamp 3 and the clamping ring 15 respectively.

[0040] By clamping the alligator clip 17 on the stainless steel throat clamp 3 and the clamping ring 15 on both sides of the side support 1, the connection method of different lines before the sliding rheostat can be adjusted, and the difference between different wiring methods can be observed with the visualization of the current path.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sliding rheostat, comprising a side support (1), the outer surface of the side support (1) is penetrated by a fixed transverse rod (2), and the outer surface of the fixed transverse rod (2) is inlaid with a curved connecting line (4), and the curved connecting line (4) is designed in a spring shape, the outer surface of one end of the side support (1) away from the fixed transverse rod (2) is penetrated by a sliding rod (7), and both ends of the sliding rod (7) penetrate the side support (1), and one end of the side support (1) is provided with a driving power supply (16), the outer surface of the sliding rod (7) is penetrated by a sliding displacement plate (8), and the sliding displacement plate (8) and the sliding rod (7) are slidably connected, characterized in that: A resistance display mechanism is provided between the curved connecting line (4) and the sliding rod (7), and the resistance display mechanism enables the working principle of the sliding rheostat to be intuitively understood after power is turned on, and the current path on the outer surface of the fixed transverse rod (2) is visualized.

2. A sliding resistor according to claim 1, characterized in that: The resistance value display mechanism comprises: a lamp holder (5), the lamp holder (5) being fixedly mounted on the outer surface of a fixed transverse rod (2), and a curved connecting line (4) on the outer surface of the fixed transverse rod (2) being respectively connected to two ends of the lamp holder (5), a screw-type bulb (6) being mounted on the inner thread of the lamp holder (5), and the lamp holder (5) being fixedly mounted on the outer surface of the sliding rod (7), and the lamp holders (5) being connected in series with each other.

3. A sliding resistor according to claim 1, characterized in that: The outer surface of the fixed transverse rod (2) is adhered with a double-conductor copper foil tape (11), and one end of the double-conductor copper foil tape (11) is connected to the outer surface of the curved connecting line (4), and the double-conductor copper foil tapes (11) between the curved connecting lines (4) are not connected to each other.

4. A sliding resistor according to claim 1, characterized in that: A contact connection mechanism is provided between the sliding rod (7) and the fixed transverse rod (2), and the circuits can be flexibly changed through the contact connection mechanism.

5. A sliding resistor according to claim 4, characterized in that: The contact connection mechanism comprises: a first contact aluminum foil sheet (9), the first contact aluminum foil sheet (9) being fixedly mounted on the outer surface of the sliding displacement plate (8) close to the fixed transverse displacement rod (2), and a second contact aluminum foil sheet (10) being fixedly mounted on the outer surface of the sliding displacement plate (8), and a lamp holder (5) being connected between the second contact aluminum foil sheet (10) and the first contact aluminum foil sheet (9), one end of the second contact aluminum foil sheet (10) being embedded in the interior of the sliding displacement plate (8), the second contact aluminum foil sheet (10) being in the shape of an arc, and the second contact aluminum foil sheet (10) being in contact with the side surface of the sliding rod (7).

6. A sliding resistor according to claim 1, characterized in that: The two ends of the sliding rod (7) are fixedly mounted with clamping rings (15), and a section of the sliding rod (7) located between the side supports (1) is embedded with an annular conductive sheet (13), and the annular conductive sheet (13) is connected to one end of the lamp holder (5), one end of the lamp holder (5) is connected to the other lamp holder (5) by a wire (14), and every two annular conductive sheets (13) are connected to each other, and the outer surface of the sliding rod (7) is embedded with a connecting aluminum foil sheet (12), and the connecting aluminum foil sheets (12) are respectively connected to the clamping rings (15), and the connecting aluminum foil sheet (12) is connected to the annular conductive sheet (13) near one end of the side support (1).

7. A sliding resistor according to claim 1, characterized in that: Stainless steel throat hoops (3) are fixedly mounted on both ends of the fixed transverse rod (2), and the side surfaces of the stainless steel throat hoops (3) are respectively connected to the two ends of the curved connecting line (4); the outer surface of the driving power source (16) is connected to an alligator clip (17), and the alligator clip (17) can be in contact with the stainless steel throat hoop (3) and the clamping ring (15) respectively.

Images