Portable extensible electromagnetic experiment device

Abstract

The utility model belongs to the technical field of electromagnetism experiment devices, and particularly relates to a portable extensible electromagnetism experiment device which comprises a base, a plurality of indicator lamp extension modules and a switch module are arranged on the base, and each indicator lamp extension module comprises an indicator lamp base and an element wiring terminal which are connected in parallel. The indicating lamp expansion module and the switch module are electrically connected with a positive terminal and a negative terminal respectively, and the base is further provided with a plurality of magnetic terminals and more than two concurrent terminals. Aiming at the requirements of teaching effect and age development, the utility model designs the concurrent binding post capable of integrating wire joints, can guide students to form a thinking habit of changing complex circuit problems into simple circuit problems, and is also provided with a plurality of expansion interfaces for butting different electromagnetic elements, so that various demonstration experiments can be rapidly arranged and updated, and the teaching efficiency is improved. And the use experience of the experimental device is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic experiment device, specifically, portable extendable electromagnetic experiment device. BACKGROUND

[0002] With the deepening of education reform, practice teaching gradually becomes an important link in the education system. Especially for science and engineering, experimental teaching is an indispensable part. However, many current junior high school physics experiments are limited by equipment, site and other factors, and it is difficult to meet the learning needs of students.

[0003] The current conventional physical electromagnetic teaching equipment, such as the patent number CN200620139727.9, name "teaching electrical experiment board", includes at least a piece of insulating material printed circuit board as the substrate, the substrate is arranged with components, the components arranged on the substrate at least have battery box, power socket, transistor, coil socket, potentiometer, resistor, state switch, indicator light, external power socket and several wires and connecting plug, the back of the substrate is printed with circuit and the components can be connected with each other; The front of the substrate has component symbols and lines corresponding to the positions of the components; The components on the front of the substrate are provided with wire sockets.

[0004] The above teaching equipment arranges various electrical components according to the teaching materials, but each component is fixed on the substrate and cannot be replaced, and the docking sequence of the wire seat is relatively fixed, which is not conducive to students' understanding of circuit connection principle and calculation formula. INVENTION CONTENTS

[0005] In order to solve the problem that the types of components on the existing electromagnetic experiment teaching equipment are limited in design and production, cannot be expanded and replaced, and the docking sequence of the wire seat is relatively fixed, which is not conducive to students' understanding of circuit connection principle and calculation formula, a portable extendable electromagnetic experiment device is provided.

[0006] The portable extendable electromagnetic experiment device comprises a base, a plurality of indicator light expansion modules and switch modules are arranged on the base, the indicator light expansion module comprises indicator light sockets and component wire terminals which are connected in parallel with each other, the indicator light expansion module and the switch module are respectively electrically connected with positive and negative terminals, and a plurality of magnetic terminals and two or more than two common terminals are arranged on the base.

[0007] Further, a power module is arranged on the base, and the power module is electrically connected with a positive terminal and a negative terminal.

[0008] Further, the indicator light expansion module and the switch module are respectively connected with the positive terminal and the negative terminal through the fixed wires on the back of the base.

[0009] Further, the back of the base is detachably connected with a protective cover plate, the back of the base and the protective cover plate form an inner cavity, and the fixed wire is installed in the inner cavity.

[0010] Further, the magnetic terminal is installed close to the side edge of the base, and the magnetic terminals are symmetrically arranged and an element placement area is arranged between the two magnetic terminals.

[0011] Further, the positive terminal, the negative terminal, the magnetic terminal, the common point terminal, the positive power terminal and the negative power terminal each include a conductive rod and an insulating cap, and the insulating cap is threadedly sleeved on the conductive rod.

[0012] Further, a clamping sleeve wire is movably sleeved on the conductive rod, and the clamping sleeve wire is provided with a conductive clamping sleeve at both ends corresponding to the conductive rod.

[0013] Further, the insulating cap is provided with a color identification layer.

[0014] Further, the base is provided with a name mark corresponding to the indicator light expansion module, the switch module, the positive terminal, the negative terminal, the magnetic terminal, the common point terminal and the power module.

[0015] The utility model has the advantages that:

[0016] 1. The common point terminal helps students to form the thinking habit of simplifying complex circuit problems, quickly obtain equivalent circuit diagrams, and improve problem solving speed and accuracy.

[0017] 2. The device has multiple external element interfaces, which are convenient to connect and have strong expandability. New element devices can be quickly connected according to the upgrading of teaching materials and the development of science and technology for experimental demonstration.

[0018] 3. The identification on the device is clear and intuitive, which facilitates quick wiring and observation of circuit flow.

[0019] 4. Each wire for connection is directly exposed, which facilitates students to observe the circuit structure.

[0020] 5. The device is small in size and light in weight, which is convenient to carry and popularize. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Fig. 1 Structure diagram of front side of portable extendable electromagnetism experiment device;

[0023] Fig. 2 Structure diagram of back side of portable extendable electromagnetism experiment device;

[0024] Fig. 3 Circuit principle diagram of experiment one;

[0025] Fig. 4 Circuit principle diagram of experiment two;

[0026] Fig. 5 Circuit principle diagram of experiment three;

[0027] Fig. 6 Wiring structure diagram of experiment four.

[0028] The drawings are identified

[0029] 1, base; 101, fixed wire; 102, inner cavity; 2, indicator light extension module; 201, indicator light seat; 202, element wiring terminal; 3, switch module; 401, positive terminal; 402, negative terminal; 5, magnetism terminal; 501, element placement area; 6, common point terminal; 7, power module; 701, power positive terminal; 702, power positive terminal; 8, clamping sleeve wire; 801, conductive clamping sleeve; 9, name identification; 10, conductive rod; 11, insulating cap; 12, U-shaped wire hanging; 13, circular magnet. DETAILED DESCRIPTION

[0030] In order to solve the problem that the types of elements set on the existing electromagnetism experiment teaching equipment are limited in design and production, cannot be extended and replaced, and the docking sequence of the wiring seat is relatively fixed, which is not conducive to students to understand the circuit wiring principle and calculation formula, a portable extendable electromagnetism experiment device is provided.

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] It is to be explained that the terms such as "inner", "middle" and "one" cited in the present specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship is also regarded as the scope of the present application without substantial change of the technical content, and it is stated in advance.

[0033] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As shown in Figs. 1-2 The present embodiment provides a portable and expandable electromagnetic experiment device, which comprises a base 1, a plurality of indicator light expansion modules 2 and switch modules 3 are arranged on the base 1, the indicator light expansion module 2 comprises indicator light sockets 201 and element connection terminals 202 which are connected in parallel with each other, the indicator light expansion module 2 and the switch module 3 are each electrically connected with a positive connection post 401 and a negative connection post 402, and the base 1 is further provided with a plurality of magnetism connection posts 5 and two or more common connection posts 6.

[0035] Among them, the parallel indicator light sockets 201 and element connection terminals 202 on the indicator light expansion module 2 can be used alternatively to share a pair of positive and negative connection posts, and the indicator light bulb is connected on the indicator light socket 201, or the capacitor, resistor, inductor, ammeter and other element devices are connected through the element connection terminal 202, so that various circuit layouts can be arranged according to the experimental requirements. The element connection terminal 202 can use the connection terminal product on the market, which is convenient for quick wiring.

[0036] The plurality of switch modules 3 facilitate the control of circuit on-off and switching of circuit layout.

[0037] The magnetism terminal 5 is used to arrange magnetic devices around the periphery after the circuit connection is completed, and to conduct magnetic experiments.

[0038] The common point terminal 6 combines the design concepts of the current flow method and the node analysis method, and can be directly used as a node, facilitating students to observe and obtain the corresponding equivalent circuit diagram, and clearly display the series-parallel connection relationship between multiple electrical appliances.

[0039] The base 1 is provided with a power module 7, and the power module 7 is electrically connected with a positive electrode terminal 701 and a negative electrode terminal 702. The power module 7 facilitates power supply during experiments, and the positive electrode terminal 701 and the negative electrode terminal 702 can be used to quickly distinguish the positive and negative electrodes of the power supply.

[0040] The indicator light extension module 2 and the switch module 3 are each connected with the positive electrode terminal 401 and the negative electrode terminal 402 through the fixed wires 101 on the back of the base 1. The back of the base 1 is detachably connected with a protective cover plate (not marked in the figure), and the back of the base 1 and the protective cover plate form an inner cavity 102, and the fixed wires 101 are installed in the inner cavity 102. The indicator light extension module 2 and the switch module 3 with back wiring are reliable and durable in structure, and can avoid electric leakage and improve the safety of the equipment.

[0041] The magnetism terminal 5 is installed close to the side edge of the base 1, and the two magnetism terminals 5 are symmetrically arranged and an element placement area 501 is arranged between the two magnetism terminals 5. The magnetism terminal 5 arranged on the outside can avoid being hindered by other mechanisms during wiring operation, and the element placement area 501 facilitates the placement and positioning of magnetic devices.

[0042] The positive electrode terminal 401, the negative electrode terminal 402, the magnetism terminal 5, the common point terminal 6, the positive electrode terminal 701 and the negative electrode terminal 702 each include a conductive rod 10 and an insulating cap 11, and the insulating cap 11 is threadedly sleeved on the conductive rod 10. A clamping sleeve wire 8 is movably sleeved on the conductive rod 10, and the two ends of the clamping sleeve wire 8 are each provided with a conductive clamping sleeve 801 corresponding to the conductive rod 10. The design of the lockable conductive rod 10 cooperating with the clamping sleeve wire 8 is a common combination of electromagnetic teaching equipment, which facilitates students to quickly complete circuit wiring without tools.

[0043] The insulating cap 11 is provided with a color identification layer. The insulating cap 11 can be provided with different colors according to the positive and negative electrodes and the functions, which facilitates quick identification.

[0044] The base 1 is provided with a name mark 9 corresponding to the indicator light extension module 2, the switch module 3, the positive electrode terminal 401, the negative electrode terminal 402, the magnetism terminal 5, the common point terminal 6 and the power module 7. The name mark 9 cooperates with the color identification layer to more directly facilitate students to confirm various components on the base 1 and prevent incorrect connection.

[0045] As Figs. 3-6 shown in the figure, the present embodiment can adapt to a variety of teaching experiment wiring mode, the following four representative experiments:

[0046] Experiment one, the structure of parallel circuit

[0047] 1、 Fig. 3 The circuit diagram, the current from the positive, after the switch S, shunt into two (shunt point marked as positive common point), respectively after the bulb L1 and the bulb L2, and then flow together (converging point marked as negative common point), back to the negative of the power supply, constitute a loop. With a pencil from the positive of the power supply, along the line order and arrow direction, until the negative of the power supply.

[0048] 2, according to Fig. 3 the order and arrow direction marked on the experimental device, first determine one of the common point terminal as the positive common point, the other common point terminal as the negative common point, from the positive of the battery start wiring.

[0049] (1) the positive of the battery through the wire ① and one end of the switch S interconnection.

[0050] (2) the other end of the switch S through the wire ② and the positive common point terminal interconnection.

[0051] (3) one end of the bulb L1 through the wire ③ and the positive common point terminal interconnection.

[0052] (4) the other end of the bulb L1 through the wire ④ and the negative common point terminal interconnection.

[0053] (5) one end of the bulb L2 through the wire ⑤ and the positive common point terminal interconnection.

[0054] (6) the other end of the bulb L2 through the wire ⑥ and the negative common point terminal interconnection.

[0055] (7) the negative common point terminal through the wire ⑦ and the negative of the battery interconnection, constitute a loop.

[0056] Among them, the wire ②, ③, ⑤ has one end of the common point terminal, representing the current from the positive through the wire ② here shunt into two: through the wire ③, the bulb L1 and the wire 4 for a road; through the wire ⑤, the bulb L2 and the wire ⑥ for another road, respectively to the negative common point reflow. Wire ④, ⑥, ⑦ of one end of the common point terminal, through the wire ⑦ back to the negative of the power supply, constitute a loop.

[0057] Wire ③, the bulb L1 and the wire ④ group of one road, and the other road of wire ⑤, the bulb L2 and the wire ⑥, each of the part called branch; wire ①, wire ② wire ⑦ of the part called trunk.

[0058] This kind of bulb L1 and bulb L2 parallel connection between two points, and then connected to the circuit connection mode, called parallel, this circuit is called parallel circuit.

[0059] This wiring path, that is, the direction of the current outside the power supply, that is, the current from the positive electrode of the power supply, and then at the branch point, the current is divided into several ways, and then converges at the convergence point, and then flows back to the negative electrode of the power supply, forming a loop.

[0060] Press the "I" key of the switch S (the switch is closed), and observe the bulb L1 (bright), bulb L2 (bright).

[0061] Press the "O" key of the switch S, and observe the bulb L1 (not bright), bulb L2 (not bright).

[0062] Experimental conclusion

[0063] Path state: when the switch is closed, the bulbs L1 and L2 are bright, and the circuit works normally.

[0064] Break state: when the switch is open, the bulbs L1 and L2 are extinguished, and the circuit is interrupted.

[0065] Parallel circuit characteristics: the bulbs L1 and L2 are connected in parallel between two points, and the current can pass through each bulb without affecting the work of other bulbs.

[0066] Experiment two, explore the influence of materials and length on resistance

[0067] Fig. 4 It is used to explore the influence of the same length of different materials or the same material of different lengths on the brightness of the bulb when connected in series with the bulb. A bulb is installed on the indicator light seat 201 of the indicator light expansion module 2, and the element connection terminal 202 of another indicator light expansion module 2 is used to alternately connect different metal wires.

[0068] The operation process is as follows:

[0069] The length of the 9cm diameter 0.1mm copper wire is connected in series to the bulb L, and the brightness of the bulb L is observed.

[0070] The length of the 9cm diameter 0.1mm nickel-chromium alloy wire is connected in series to the bulb L, and the brightness of the bulb L is observed.

[0071] The length of the 12cm diameter 0.1mm nickel-chromium alloy is connected in series to the bulb L, and the brightness of the bulb L is observed.

[0072] The length of the 9cm diameter 0.5mm nickel-chromium alloy wire is connected in series to the bulb L, and the brightness of the bulb L is observed.

[0073] Experiment three, explore the law of series resistance by voltammetry

[0074] Experimental procedure

[0075] 1. According to the figure, install resistance R1 and R2 on the two element terminals 202, connect R1, R2 and power module 7, switch module 3 in series, connect ammeter, and use voltmeter to measure the series voltage of R1 and R2. Fig. 5

[0076] 2. Use resistance with resistance value of 5Ω, 10Ω, 15Ω as R1 or R2, alternately combine, and install on the experimental device.

[0077] 3. Record the voltage and current value measured by each group of R1 and R2 combination.

[0078] 3. Calculate the U / I value of each group of R1 and R2 combination.

[0079] 4. Compare the value of R1+R2 with the value of U / I.

[0080] Experiment four, explore the effect of magnetic field on the current-carrying wire

[0081] Experimental operation

[0082] 1. As shown in the figure, connect each circuit element. Fig. 6

[0083] 2. Vertically connect the supporting wire on the two symmetrical magnet terminals 5.

[0084] 3. Hang the U-shaped wire 12 above the element placement area 501 between the two symmetrical magnet terminals 5 of the supporting wire.

[0085] 4. Place the N pole of the circular magnet 13 upward below the element placement area 501 of the U-shaped wire 12.

[0086] 5. Activate the switch module 3 and observe the phenomenon (the wire moves forward or backward).

[0087] 6. Disconnect the switch module 3 and place the S pole of the circular magnet 13 upward below the U-shaped wire 12.

[0088] 7. Activate the switch module 3 and observe the phenomenon (the wire moves forward or backward).

[0089] 8. Disconnect the switch module 3 and reverse the positive and negative poles of the power module 7.

[0090] 9. Place the N pole of the circular magnet 13 upward below the U-shaped wire 12.

[0091] 10. Activate the switch module 3 and observe the phenomenon​​​ (lead wire moves forward or backward).

[0092] 11, disconnect the switch module 3, put the S pole of the round magnet 13 upward below the U-shaped hanging wire 12;

[0093] 12, activate the switch module 3, and observe the phenomenon (lead wire moves forward or backward).

[0094] The above phenomenon is the Ampere force that the energized lead wire receives in the magnetic field.

[0095] Left-hand rule

[0096] Stretch out the left hand, make the thumb perpendicular to the remaining four fingers, and all in the same plane with the palm; let the magnetic induction line (N pole facing the heart) enter from the palm, and let the four fingers point to the direction of the current, at this time the direction of the thumb is the direction of the Ampere force that the energized lead wire receives in the magnetic field. This is the left-hand rule for determining the force direction of the energized conductor in the magnetic field.

[0097] Steps for applying the left-hand rule to determine the direction of Ampere force:

[0098] 1, preparation posture: stretch out the left hand, make the thumb perpendicular to the remaining four fingers, and all in the same plane with the palm.

[0099] 2, magnetic induction line direction: let the magnetic induction line (N pole of the magnet) face from the palm.

[0100] 3, current direction: four fingers point to the direction of the current.

[0101] 4, Ampere force direction: at this time the direction of the thumb is the direction of the Ampere force.

[0102] The above is a further detailed description of the utility model in combination with the preferred embodiment, which cannot be determined that the specific implementation of the utility model is limited to these descriptions, that is, any equivalent changes and modifications made within the scope of the application shall still belong to the scope covered by the utility model.

Claims

1. A portable, scalable electromagnetics experiment apparatus comprising a base, characterized in that, The base is provided with a plurality of indication light extension modules and switch modules, the indication light extension module comprises indication light sockets and element connection terminals which are connected in parallel with each other, the indication light extension module and the switch module are respectively electrically connected with positive connection posts and negative connection posts, and the base is further provided with a plurality of magnetic connection posts and two or more common connection posts.

2. The portable, scalable electromagnetics experiment apparatus of claim 1, wherein, The base is provided with a power module, and the power module is electrically connected with a power positive connection post and a power negative connection post.

3. The portable, scalable electromagnetics experiment apparatus of claim 1, wherein, The indication light extension module and the switch module are respectively connected with the positive connection post and the negative connection post through fixed wires on the back of the base.

4. The portable and expandable electromagnetism experiment device according to claim 3, the back of the base is detachably connected with a protective cover plate, the back of the base and the protective cover plate form an inner cavity, and the fixed wires are installed in the inner cavity.

5. The portable, scalable electromagnetics experiment apparatus of claim 1, wherein, The magnetic connection posts are installed close to the side edges of the base, the magnetic connection posts are symmetrically arranged in pairs, and an element placement area is arranged between the two magnetic connection posts.

6. The portable, scalable electromagnetics experiment apparatus of claim 2, wherein, The positive connection post, the negative connection post, the magnetic connection post, the common connection post, the power positive connection post and the power negative connection post all comprise a conductive rod and an insulating cap, and the insulating cap is threadedly sleeved on the conductive rod.

7. The portable, scalable electromagnetics experiment apparatus of claim 6, wherein, A clamping sleeve wire is movably sleeved on the conductive rod, and the clamping sleeve wire is provided with a conductive clamping sleeve at both ends corresponding to the conductive rod.

8. The portable, scalable electromagnetics experiment apparatus of claim 6, wherein, The insulating cap is provided with a color identification layer.

9. The portable, scalable electromagnetics experiment apparatus of claim 2, wherein, The base is provided with name marks corresponding to the indication light extension module, the switch module, the positive connection post, the negative connection post, the magnetic connection post, the common connection post and the power module.

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