Pressing type sound transmission demonstration device

Abstract

The utility model discloses a pressing type sound transmission demonstration device, which belongs to the technical field of scientific demonstration equipment and comprises a demonstration platform. The device is characterized in that a circuit case is arranged on the demonstration platform, a passive buzzer, a frequency generator and a connecting circuit are arranged in the circuit case, a preset number of pressing switch assemblies are arranged on the outer side of the circuit case through an annular matrix, and the preset number of pressing switch assemblies are connected to the connecting circuit in series; each push switch assembly is composed of a push switch and a resistor which are arranged in parallel, and the resistance values of the resistors of the push switch assemblies are different. The beneficial effects of the utility model are that short circuit of circuits at two ends of the resistor is realized through closing of the push switch, difference between parallel connection and series connection is displayed, total resistance value of the resistor of the whole circuit is adjusted through short circuit of the resistor and switching of an access, and the passive buzzer can make different sounds by means of the frequency generator. Children are attracted to understand the logic relation of the circuit through interaction.

Description

Technical Field:

[0001] The utility model belongs to the technical field of scientific demonstration equipment, and more specifically relates to a push-button sound transmission demonstration device. Background Art:

[0002] Circuits are a strange but important field for primary and middle school students. The relationship between parallel and series connections directly affects the connection relationship of electronic components in the entire circuit.

[0003] In junior high school teaching, circuits in parallel or series are also combined with light bulbs to explain the concepts and principles of parallel and series. Currently, there is a lack of a demonstration device that combines more complex parallel and series circuit combinations with sound and realizes sound transmission through human interaction. Content of the Utility Model:

[0004] To solve the above problems and overcome the deficiencies of the prior art, the utility model provides a push-button sound transmission demonstration device;

[0005] The first technical problem solved is: the lack of a demonstration device that combines more complex parallel and series circuit combinations with sound and realizes sound transmission through human interaction;

[0006] The specific technical solution of the utility model to solve the above technical problems is: the push-button sound transmission demonstration device includes a demonstration platform; characterized in that: a circuit chassis is arranged on the demonstration platform, a passive buzzer, a frequency generator and a connection circuit are arranged in the circuit chassis, and a preset number of push-button switch components are arranged in a circular matrix on the outer side of the circuit chassis, and the preset number of push-button switch components are connected in series on the connection circuit;

[0007] The push-button switch component is composed of a push-button switch and a resistor arranged in parallel, and the resistance values of the resistors of each push-button switch component are different.

[0008] Further, the input end of the frequency generator is connected to the connection circuit.

[0009] Further, the output end of the frequency generator is connected to the passive buzzer.

[0010] Further, the frequency generator is also connected to a power supply.

[0011] Further, an internal circuit connection schematic diagram is sprayed on the upper end surface of the circuit chassis.

[0012] The beneficial effects of the utility model are:

[0013] One advantage of the utility model is to provide a preset number of push-button switch components arranged in a circular matrix. By pressing different push-button switches, different sounds can be emitted, increasing interaction and attracting children's attention;

[0014] One advantage of the present utility model is to provide different push switches. By closing the push switches, a short circuit is achieved in the circuit at both ends of the resistor, demonstrating the difference between parallel and series connections. By switching between the short circuit and the conducting state of the resistor, the total resistance value of the entire circuit is adjusted. With the help of a frequency generator, a passive buzzer emits different sounds, attracting children to understand the logical relationship of the circuit through interaction;

[0015] One advantage of the present utility model is that the upper end face of the circuit chassis is sprayed with a schematic diagram of internal circuit connections, facilitating children's understanding and learning. BRIEF DESCRIPTION OF THE DRAWINGS:

[0016] FIG Figure 1 is a schematic structural diagram of the present utility model;

[0017] FIG Figure 2 is a schematic diagram of internal circuit connections of the present utility model; In the drawings:

[0018] 1. Demonstration platform; 2. Circuit chassis; 3. Passive buzzer; 4. Push switch; 5. Connecting circuit; 6. Frequency generator; 7. Resistor. DETAILED DESCRIPTION OF THE EMBODIMENTS:

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] The detailed embodiment of the present utility model: The described push-button sound transmission demonstration device includes a demonstration platform 1; characterized in that: a circuit chassis 2 is arranged on the demonstration platform 1, and a passive buzzer 3, a frequency generator 6 and a connecting circuit 5 are arranged inside the circuit chassis 2. A preset number of push switch assemblies are arranged on the outer side of the circuit chassis 2 in a circular matrix, and the preset number of push switch assemblies are connected in series on the connecting circuit 5;

[0021] The push switch assembly is composed of a push switch 4 and a resistor 7 connected in parallel, and the resistance values of the resistors 7 of each push switch assembly are different.

[0022] Further, the input end of the frequency generator 6 is connected to the connecting circuit 5.

[0023] Further, the output end of the frequency generator 6 is connected to the passive buzzer 3.

[0024] Further, a power supply is also connected to the frequency generator 6.

[0025] Further, a schematic diagram of internal circuit connections is sprayed on the upper end face of the circuit chassis 2.

[0026] It should be noted that the present utility model is a pressing type sound transmission demonstration device. During specific operation,

[0027] An operator arbitrarily presses the pressing switch 4 of different pressing switch assemblies. At this time, the pressing switch 4 forms a circuit, resulting in a short circuit of the circuit at both ends of the resistor 7.

[0028] Since the resistance values of the resistors 7 of each pressing switch assembly are different, arbitrarily pressing the pressing switch 4 of each switch assembly and combinatorially pressing the pressing switches 4 of different switch assemblies will cause the total resistance value of the connected circuit 5 to change.

[0029] This change in the total resistance value forms a waveform current signal through the frequency generator 6 and emits different sounds through the passive buzzer 3.

[0030] As a preferred implementation of the present utility model, the model of the frequency generator 6 is NE555, and the power supply voltage connected to the frequency generator 6 is 5V.

[0031] The effects are as follows: Different sounds are emitted, increasing interaction and attracting children's attention; Children are attracted by the sounds to understand the logical relationship of the circuit. A schematic diagram of internal circuit connections is sprayed on the upper end face of the circuit chassis, which is convenient for children to understand and learn.

[0032] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pressing type sound transmission demonstration device, comprising a demonstration platform (1); characterized in that: A demonstration platform (1) is provided with a circuit chassis (2). Inside the circuit chassis (2), a passive buzzer (3), a frequency generator (6) and a connection circuit (5) are provided. A preset number of push switch assemblies are arranged on the outer side of the circuit chassis (2) through an annular matrix, and the preset number of push switch assemblies are connected in series on the connection circuit (5); The push switch assembly is composed of a push switch (4) and a resistor (7) arranged in parallel, and the resistance values of the resistors (7) of each push switch assembly are different.

2. The pressing sound transmission demonstration device according to claim 1, wherein The input end of the frequency generator (6) is connected to the connection circuit (5).

3. The pressing sound transmission demonstration device according to claim 2, characterized in that The output end of the frequency generator (6) is connected to the passive buzzer (3).

4. The pressing sound transmission demonstration device according to claim 3, wherein The frequency generator (6) is also connected to a power supply.

5. The pressing sound transmission demonstration device according to claim 1, characterized in that The upper end surface of the circuit chassis (2) is sprayed with a schematic diagram of internal circuit connection.

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