Current demonstration teaching aid of building block type battery

Abstract

The utility model provides a current demonstration teaching aid of a building block type battery, which comprises a substrate, an air pump, a series module and a parallel module, a plurality of base blocks are raised on the mounting surface of the substrate, the center of each base block is provided with an air hole, the air pump is communicated with the air holes of the plurality of base blocks one by one through an air pipeline, and the air pipeline is provided with a ventilation electromagnetic valve; the series module comprises a transparent single telescopic pipe, a first display ball is placed in the single telescopic pipe, first sleeves are fixedly connected to the two ends of the single telescopic pipe, a notch is formed in the outer wall of a base block in a concave mode, the first sleeves are connected with the base block in a sleeved mode to form detachable clamping connection, and an exhaust channel is formed by the notch and the inner wall of the first sleeve. The parallel module comprises bifurcated pipes located at the two ends, a plurality of transparent telescopic branch pipes are independently connected between the bifurcated pipes, second display balls are placed in the telescopic branch pipes, the outer ends of the bifurcated pipes are fixedly connected with second sleeves, the second sleeves are connected with the base blocks in a sleeved mode to form detachable clamping connection, and exhaust channels are formed by notches and the inner walls of the second sleeves. The method has the advantages of strong intuition, convenient operation, high safety and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery modules and relates to an educational product, in particular to a current demonstration teaching aid for a building block type battery. Background Art

[0002] Teaching aids refer to models, objects, specimens, instruments, charts, slides, etc. used to explain something, including teaching equipment, teaching instruments, training equipment, educational equipment, experimental equipment, teaching specimens, teaching models, etc. Teaching aids are physical objects for the purpose of spreading science and technology and educating people. They are complete scientific and technological media and are indispensable equipment for youth science and technology activities.

[0003] The characteristics of teaching aids and their functions in scientific and technological activities are mainly as follows.

[0004] (1) Intuitiveness: Intuitiveness is often used as a teaching aid for demonstration in scientific and technological activities.

[0005] (2) Practicality. Physical media can mostly be touched, used, and dissected, which is of special significance in cultivating students’ skills.

[0006] (3) Research value. Physical media contain a wealth of scientific and technological information, and much of the content has not yet been extracted by humans. It itself is an object of scientific research.

[0007] (4) Typicality. The typicality of visual teaching aids makes them meet teaching requirements, effectively form clear representations, and guide students to understand the essence of things from the displayed phenomena.

[0008] The current generated by the movement of charges in the circuit connection of the battery is an abstract electrical principle. In the existing teaching aids or molds for circuit connection, different wires are often used to connect the circuit connection structure, corresponding to different current on-off experiments. This kind of teaching aid or mold is at least suitable for teenagers to operate and learn, but there is a lack of corresponding molds for children's cognition of the movement of charges in the current. Traditional circuit molds are more abstract and dangerous for children's learning, so they are difficult to adapt to children's learning in electricity. Utility Model Content

[0009] The utility model aims to solve the above problems in the prior art and proposes a current demonstration teaching aid for building block type batteries.

[0010] The purpose of the utility model can be achieved through the following technical solutions: a current demonstration teaching aid for building block type batteries, comprising a base plate, an air pump, a series module and a parallel module, a plurality of base blocks protruding in a rectangular array on the mounting surface of the base plate, a ventilation hole is opened in the center of the base block, the air pump is connected to the air holes of the plurality of base blocks one by one through an air delivery pipeline, and a ventilation solenoid valve is arranged on the air delivery pipeline; the series module comprises a transparent single telescopic tube, a display ball is placed in the single telescopic tube, a blocking net is arranged on the two end pipe openings of the single telescopic tube, and the single telescopic tube is provided with a plurality of air holes connected to the single telescopic tube. The two ends of the tube are fixedly connected to a sleeve, a notch is recessed on the outer wall of the base block, the sleeve is sleeved on the base block to form a detachable snap-in connection, and the notch and the inner wall of the sleeve form an exhaust passage; the parallel module includes bifurcated tubes at both ends, a plurality of transparent telescopic branch tubes are independently connected between the bifurcated tubes, a display ball two is placed in the telescopic branch tube, two blocking nets are arranged on the pipe openings at both ends of the telescopic branch tube, the outer end of the bifurcated tube is fixedly connected to a sleeve two, the sleeve two is sleeved on the base block to form a detachable snap-in connection, and the notch and the inner wall of the sleeve two form an exhaust passage.

[0011] In the above-mentioned current demonstration teaching aids of the building block battery, the gas supply pipeline includes a main air pipe, one end of the main air pipe is connected to the air outlet of the air pump, and the other end of the main air pipe is connected to a plurality of bronchi, and the plurality of bronchi are connected to the air holes of the plurality of base blocks in a one-to-one correspondence, and the ventilation solenoid valve is arranged on the bronchi.

[0012] In the above-mentioned current demonstration teaching aids of the building block battery, the ventilation solenoid valve includes a valve body connected in series to the bronchus, a valve plate is arranged in the valve cavity of the valve body, the valve plate is controlled and connected by an electromagnetic head, the electromagnetic head is connected to the livestock battery through an electric wire, the control button of the electromagnetic head extends from the mounting surface of the substrate, and the control button is arranged on the side of the corresponding base block.

[0013] In the above-mentioned current demonstration teaching aid of the building block battery, the bifurcated tube includes a main tube located at the outer end, the inner end of the main tube is connected to at least two branch tubes, and the branch tubes of the two bifurcated tubes are connected to the telescopic branch tube in a one-to-one correspondence.

[0014] In the above-mentioned current demonstration teaching aid of the building block type battery, the single telescopic tube / the telescopic branch tube is specifically a bellows made of transparent plastic, and a plurality of folded corrugated sheets of the bellows are connected along the folding and telescopic direction to form an elastic telescopic amount.

[0015] In the above-mentioned current demonstration teaching aid of building block type battery, the display ball 1 / display ball 2 is a colorful plastic ball, and the plastic ball has a hollow closed cavity.

[0016] In the above-mentioned current demonstration teaching aid of building block type battery, a clamping ring is convexly provided on the inner periphery of the sleeve 1 / the sleeve 2, and a clamping groove is correspondingly concavely provided on the peripheral wall of the base block, and the clamping ring is embedded in the clamping groove to form an elastic clamping connection.

[0017] In the above-mentioned current demonstration teaching aid for building block type batteries, the notch is arranged parallel to the axis of the base block, and the notch penetrates the thickness of the base block.

[0018] In the above-mentioned current demonstration teaching aid of the building block type battery, the substrate is marked with a DC positive pole symbol, a DC negative pole symbol or an AC symbol on the side of the base block.

[0019] In the above-mentioned current demonstration teaching aid of the building block type battery, the base block is a square block, and the sleeve one / the sleeve two is a square cylinder; or the base block is a round block, and the sleeve one / the sleeve two is a round cylinder.

[0020] How to use this building block battery current demonstration teaching aid:

[0021] 1. Sleeve the sleeves 1 at both ends of the series module on the base block of the DC positive symbol and the base block of the DC negative symbol respectively, open the air pump and the ventilation solenoid valve of the DC positive symbol base block, most of the airflow will blow the display ball 1 from the DC positive symbol base block to the DC negative symbol base block, and the display ball 1 will move to the end and be blocked by the blocking net to simulate the direction of the series DC current, and a small part of the airflow will be discharged from the exhaust channel. Close the ventilation solenoid valve of the DC positive symbol base block, open the ventilation solenoid valve of the DC negative symbol base block, and reset the display ball 1.

[0022] 2. Put the sleeves at both ends of the series module on the two AC symbol base blocks respectively, turn on the air pump and the ventilation solenoid valve of an AC symbol base block, most of the airflow will blow the display ball 1 from one AC symbol base block to another AC symbol base block, and the display ball 1 moves to the end and is blocked by the blocking net, and a small part of the airflow is discharged from the exhaust channel; after an interval, close the ventilation solenoid valve of one AC symbol base block, and open the ventilation solenoid valve of another AC symbol base block, and the display ball 1 is blown from another AC symbol base block to one AC symbol base block to realize the simulation of the direction of the series AC current.

[0023] 3. Sleeve the sleeves 2 at both ends of the parallel module on the base block of the DC positive symbol and the base block of the DC negative symbol respectively, open the air pump and the ventilation solenoid valve of the DC positive symbol base block, most of the airflow will blow at least two display balls 2 synchronously from the DC positive symbol base block to the DC negative symbol base block, and the display ball 2 will move to the end and be blocked by the blocking net to achieve the simulation of the parallel DC current direction, and a small part of the airflow will be discharged from the exhaust channel. Close the ventilation solenoid valve of the DC positive symbol base block, open the ventilation solenoid valve of the DC negative symbol base block, and reset at least two display balls 2.

[0024] 4. The sleeves 2 at both ends of the parallel module are respectively mounted on the base blocks of the two AC symbols, and the air pump and the ventilation solenoid valve of one AC symbol base block are turned on. Most of the airflow will synchronously blow the display ball 2 in different telescopic branches from one AC symbol base block to another AC symbol base block. The display ball 2 moves to the end and is blocked by the blocking net, and a small part of the airflow is discharged from the exhaust channel. After the interval, the ventilation solenoid valve of one AC symbol base block is closed, and the ventilation solenoid valve of another AC symbol base block is opened. The display ball 2 in different telescopic branches will be synchronously blown from another AC symbol base block to one AC symbol base block to realize the simulation of the direction of series AC current.

[0025] Compared with the prior art, the current demonstration teaching aid of the building block type battery has the following beneficial effects:

[0026] 1. Intuitive teaching: The teaching aids adopt a building block design with an intuitive structure and operation method, which can attract students' attention and make the concept of electric current easier to understand.

[0027] 2. Simulate real circuits: Through the design of series modules and parallel modules, the connection method of real circuits can be simulated, so that children can intuitively observe the flow path and characteristics of current in the experiment, and the overall experimental process is vivid and interesting.

[0028] 3. Convenient experimental operation: The teaching aid adopts a disassembly and assembly design, and the sleeve and the base block are elastically connected, making the disassembly and assembly operations simple and quick, which is convenient for teachers to conduct experimental demonstrations and students to conduct experimental operations.

[0029] 4. Accurate airflow control: Through the control of the ventilation solenoid valve, the output of the airflow can be accurately controlled, making the demonstration effect more stable and reliable.

[0030] 5. Reasonable material selection: The use of corrugated tubes and colored plastic balls made of transparent plastic not only reduces the weight of the teaching aids, making it easier for the airflow to blow the ball, but also makes the movement of the ball more obvious, enhancing the visual effect of the experiment.

[0031] 6. High safety: The teaching aids are made of plastic, plastic and other materials, and can be disassembled and assembled many times, reducing the risk of accidental injury caused by careless operation.

[0032] 7. Clear teaching guidance: The DC positive pole symbol, DC negative pole symbol or AC symbol are marked next to the substrate, which provides clear guidance for teaching operations and helps students correctly understand the circuit connection method.

[0033] In summary, this building block battery current demonstration teaching aid has the advantages of strong intuitiveness, convenient operation, simulation of real circuits, and high safety. It can effectively improve children's understanding of the concept of current and their interest in experimental operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a top view of the structure of the current demonstration teaching aid of this building block battery.

[0035] Figure 2 This is the main structural diagram of the current demonstration teaching aid of this building block battery.

[0036] Figure 3 This is the schematic diagram of the ventilation solenoid valve in this building block battery current demonstration teaching aid.

[0037] In the figure, 1, air pump; 2, gas pipeline; 3, ventilation solenoid valve; 3a, valve body; 3b, valve plate; 3c, electromagnetic head; 3d, button; 4, substrate; 5, base block; 5a, vent; 5b, notch; 6, single telescopic tube; 7, sleeve one; 8, blocking net one; 9, display ball one; 10, sleeve two; 11, bifurcated tube; 12, telescopic branch pipe; 13, blocking net two; 14, display ball two. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0039] like Figures 1 to 2As shown, the current demonstration teaching aid of the building block type battery includes a base plate 4, an air pump 1, a series module and a parallel module. A plurality of base blocks 5 are raised in a rectangular array on the mounting surface of the base plate 4. A ventilation hole 5a is opened in the center of the base block 5. The air pump 1 is connected to the air holes of the plurality of base blocks 5 one by one through an air delivery pipeline 2. A ventilation solenoid valve 3 is arranged on the air delivery pipeline 2; the series module includes a transparent single telescopic tube 6, a display ball 9 is placed in the single telescopic tube 6, a blocking net 8 is arranged on the two end pipe openings of the single telescopic tube 6, and sleeves 7 are fixedly connected to the two ends of the single telescopic tube 6. A notch 5b is recessed on the outer wall of 5, and a sleeve 7 is sleeved on the base block 5 to form a detachable snap connection, and the notch 5b and the inner wall of the sleeve 7 form an exhaust channel; the parallel module includes a bifurcated tube 11 located at both ends, and a plurality of transparent telescopic branch tubes 12 are independently connected between the bifurcated tubes 11, and a display ball 14 is placed in the telescopic branch tube 12. A blocking net 13 is set on the pipe openings at both ends of the telescopic branch tube 12, and the outer end of the bifurcated tube 11 is fixedly connected to a sleeve 10, and the sleeve 10 is sleeved on the base block 5 to form a detachable snap connection, and the notch 5b and the inner wall of the sleeve 10 form an exhaust channel.

[0040] The gas delivery pipeline 2 includes a main air pipe, one end of which is connected to the air outlet of the air pump 1, and the other end of which is connected to a plurality of bronchial tubes, which are connected to the air holes of a plurality of base blocks 5 in a one-to-one correspondence, and the ventilation solenoid valve 3 is arranged on the bronchial tube. When the air pump 1 is turned on, airflow is generated, and the airflow enters the bronchial tube through the main air pipe. When the ventilation solenoid valve 3 on some bronchial tubes is turned on, the airflow is output from the air holes of the corresponding base blocks 5.

[0041] As shown in Figure 3, the ventilation solenoid valve 3 includes a valve body 3a connected in series to the bronchus, a valve plate 3b is arranged in the valve cavity of the valve body 3a, the valve plate 3b is controlled and connected by the electromagnetic head 3c, the electromagnetic head 3c is connected to the livestock battery through an electric wire, and the control button 3d of the electromagnetic head 3c extends from the mounting surface of the substrate 4, and the control button 3d is arranged on the side of the corresponding base block 5. The ventilation solenoid valve 3 is a prior art, which is a mature product and can be installed on the teaching aids by purchase, so its detailed structure and working principle are not described in detail here. When the button 3d is pressed, the electromagnetic head 3c controls the valve plate 3b to flip to connect the valve cavity to allow airflow to pass; when the button 3d is reset, the electromagnetic head 3c controls the valve plate 3b to reset to cut off the valve cavity and block the airflow.

[0042] like Figure 1 As shown, the bifurcated pipe 11 includes a main pipe at the outer end, the inner end of the main pipe is connected to at least two branch pipes, and the branch pipes of the two bifurcated pipes 11 are connected to the telescopic branch pipes 12 one by one. The main pipe of the bifurcated pipe 11 forms a current main circuit of the parallel circuit, and the branch pipes of the bifurcated pipe 11 and the telescopic branch pipe 12 form a current branch circuit of the parallel circuit, thereby using a physical simulation circuit structure.

[0043] like Figure 1 and 2As shown, the single telescopic tube 6 / telescopic branch tube 12 is specifically a corrugated tube made of transparent plastic, and several folded corrugated sheets of the corrugated tube are connected along the folding and telescopic direction to form an elastic telescopic amount. The folded corrugated sheets of the corrugated tube are used to achieve elongation or shortening, thereby adapting to the connection of base blocks 5 at different distances.

[0044] Display ball 1 9 / display ball 2 14 are colorful plastic balls with a hollow closed cavity. The hollow plastic ball is used to reduce the weight of the ball, so that the airflow can easily blow the ball. The colorful ball is used to make the movement of the ball obvious.

[0045] The inner circumference of the sleeve 1 7 / sleeve 2 10 is convexly provided with a clamping ring, and the peripheral wall of the base block 5 is correspondingly concavely provided with a clamping groove, and the clamping ring is inserted into the clamping groove to form an elastic clamping connection. The sleeve 1 7 / sleeve 2 10 and the clamping ring thereon are made of plastic material in one piece, so that the clamping ring has an elastic deformation amount, so that the clamping ring and the clamping groove form an elastic clamping connection, which is convenient for multiple disassembly and assembly.

[0046] The notch 5b is arranged parallel to the axis of the base block 5, and the notch 5b penetrates the thickness of the base block 5. The notch 5b extends along the thickness of the base block 5, so that after the base block 5 and the sleeve are matched, an exhaust channel with a certain length is formed between the two. The exhaust channel is used to exhaust the inside of the series module or the parallel module to avoid damage to the teaching aids caused by air pressure.

[0047] The substrate 4 is marked with a DC positive pole symbol, a DC negative pole symbol or an AC power symbol on the side of the base block 5. The two ends of the series module or parallel module are connected according to the symbol on the side of the base block 5, thereby correspondingly demonstrating the flow direction and mode of the current.

[0048] The base block 5 is a square block, and the sleeve 1 7 / sleeve 2 10 is a square cylinder; or the base block 5 is a circular block, and the sleeve 1 7 / sleeve 2 10 is a circular cylinder.

[0049] How to use this building block battery current demonstration teaching aid:

[0050] 1. Sleeve the sleeves 7 at both ends of the series module on the base block 5 of the DC positive pole symbol and the base block 5 of the DC negative pole symbol respectively, open the air pump 1 and the ventilation solenoid valve 3 of the DC positive pole symbol base block 5, most of the airflow blows the display ball 9 from the DC positive pole symbol base block 5 to the DC negative pole symbol base block 5, and the display ball 9 moves to the end and is blocked by the blocking net 8 to achieve the simulation of the direction of the series DC current, and a small part of the airflow is discharged from the exhaust channel. Close the ventilation solenoid valve 3 of the DC positive pole symbol base block 5, open the ventilation solenoid valve 3 of the DC negative pole symbol base block 5, and reset the display ball 9.

[0051] 2. The sleeves 7 at both ends of the series module are respectively sleeved on the base blocks 5 of the two AC symbols, and the air pump 1 and the ventilation solenoid valve 3 of the one AC symbol base block 5 are turned on. Most of the airflow will blow the display ball 9 from one AC symbol base block 5 to the other AC symbol base block 5. The display ball 9 moves to the end and is blocked by the blocking net 8, and a small part of the airflow is discharged from the exhaust channel; after the interval, the ventilation solenoid valve 3 of one AC symbol base block 5 is closed, and the ventilation solenoid valve 3 of the other AC symbol base block 5 is turned on. The display ball 9 is blown from the other AC symbol base block 5 to the one AC symbol base block 5, so as to realize the simulation of the direction of the series AC current.

[0052] 3. Sleeve the sleeves 2 10 at both ends of the parallel module on the base block 5 of the DC positive symbol and the base block 5 of the DC negative symbol respectively, open the air pump 1 and the ventilation solenoid valve 3 of the DC positive symbol base block 5, most of the airflow will blow at least two display balls 2 14 synchronously from the DC positive symbol base block 5 to the DC negative symbol base block 5, and the display ball 2 14 moves to the end and is blocked by the blocking net 2 13 to achieve the simulation of the parallel DC current direction, and a small part of the airflow is discharged from the exhaust channel. Close the ventilation solenoid valve 3 of the DC positive symbol base block 5, open the ventilation solenoid valve 3 of the DC negative symbol base block 5, and reset at least two display balls 2 14.

[0053] 4. The sleeves 10 at both ends of the parallel module are respectively sleeved on the base blocks 5 of the two AC symbols, and the ventilation solenoid valves 3 of the air pump 1 and the AC symbol base block 5 are turned on. Most of the airflow synchronously blows the display balls 14 in different telescopic branches 12 from one AC symbol base block 5 to another AC symbol base block 5. The display balls 14 move to the end and are blocked by the blocking net 13, and a small part of the airflow is discharged from the exhaust channel; after the interval, the ventilation solenoid valve 3 of one AC symbol base block 5 is closed, and the ventilation solenoid valve 3 of the other AC symbol base block 5 is opened. The display balls 14 in different telescopic branches 12 are synchronously blown from another AC symbol base block 5 to one AC symbol base block 5, so as to realize the simulation of the direction of the series AC current.

[0054] The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the defined scope. Although the utility model is described and described in detail in the drawings and the foregoing description, such descriptions and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the utility model covers additional embodiments having any combination of features from the above-mentioned different embodiments. In terms of the use of the expression "generally" or "substantially", this patent application should be understood to disclose that these features and values ​​are also fully satisfied, that is, there is no aforementioned characterization as "generally" or "substantially".

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A current demonstration teaching aid for a building block battery, comprising a substrate, an air pump, a series module and a parallel module, characterized in that: A plurality of base blocks are raised in a rectangular array on the mounting surface of the substrate, and an air hole is opened in the center of the base block. The air pump is connected to the air holes of the plurality of base blocks one by one through an air delivery pipeline, and an air solenoid valve is arranged on the air delivery pipeline; the series module comprises a transparent single telescopic tube, a display ball is placed in the single telescopic tube, a blocking net is arranged on the two end pipe openings of the single telescopic tube, and a sleeve is fixedly connected to the two ends of the single telescopic tube, and a notch is recessed on the outer wall of the base block, and the sleeve is sleeved with the base block to form a detachable clamping connection, and the notch and the inner wall of the sleeve form an exhaust channel; the parallel module comprises a bifurcated tube located at both ends, and a plurality of transparent telescopic branch tubes are independently connected between the bifurcated tubes, a display ball is placed in the telescopic branch tube, and a blocking net is arranged on the two end pipe openings of the telescopic branch tube, and the outer end of the bifurcated tube is fixedly connected to a sleeve, and the sleeve is sleeved with the base block to form a detachable clamping connection, and the notch and the inner wall of the sleeve form an exhaust channel.

2. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The gas pipeline includes a main air pipe, one end of which is connected to the air outlet of the air pump, and the other end of which is connected to a plurality of bronchi. The bronchi are connected to the air holes of the blocks in a one-to-one correspondence, and the ventilation solenoid valve is arranged on the bronchi.

3. The current demonstration teaching aid of the building block type battery as claimed in claim 2, characterized in that: The ventilation solenoid valve includes a valve body connected in series to the bronchus, a valve plate is arranged in the valve cavity of the valve body, the valve plate is controlled and connected by an electromagnetic head, the electromagnetic head is connected to a livestock battery through an electric wire, the control button of the electromagnetic head extends from the mounting surface of the substrate, and the control button is arranged on the side of the corresponding base block.

4. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The bifurcated pipe comprises a main pipe located at the outer end, the inner end of the main pipe is connected to at least two branch pipes, and the branch pipes of the two bifurcated pipes are connected to the telescopic branch pipes in a one-to-one correspondence.

5. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The single telescopic tube / the telescopic branch tube is specifically a corrugated tube made of transparent plastic, and a plurality of folded corrugated sheets of the corrugated tube are connected along the folding and telescopic direction to form an elastic telescopic amount.

6. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The display ball 1 / display ball 2 is a colorful plastic ball having a hollow closed cavity.

7. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: A clamping ring is convexly arranged on the inner circumference of the sleeve 1 / the sleeve 2, and a clamping groove is correspondingly concavely arranged on the circumferential wall of the base block, and the clamping ring is embedded in the clamping groove to form an elastic clamping connection.

8. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The notch is arranged parallel to the axis of the base block, and the notch penetrates the thickness of the base block.

9. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The substrate is marked with a DC positive pole symbol, a DC negative pole symbol or an AC power symbol on the side of the base block.

10. The current demonstration teaching aid of the building block type battery as claimed in claim 1, characterized in that: The base block is a square block, and the sleeve one / the sleeve two is a square cylinder; or the base block is a circular block, and the sleeve one / the sleeve two is a circular cylinder.

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