Saving pot

Abstract

The present disclosure relates to the technical field of household articles, and discloses a saving pot, comprising: a control chip circuit having a plurality of different pins; the crystal oscillator is connected with a crystal oscillator pin of the control chip circuit; the night lamp is connected with a light control pin of the control chip circuit and is used for emitting light according to the control signal output by the control chip circuit; the microphone circuit is connected with a voice input pin of the control chip circuit; the loudspeaker circuit is connected with a voice output pin of the control chip circuit; and the coin identification circuit comprises three different coin identification branches, each coin identification branch is provided with a switch, and the three coin identification branches are respectively connected with three different coin control pins of the control chip circuit. According to the saving pot, the use convenience can be improved, and the intelligent degree of the saving pot is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of household items, for example, relates to a piggy bank. Background Art

[0002] With the advent of the intelligent era, traditional piggy banks have been difficult to meet the needs of modern consumers, especially in promoting the cultivation of savings habits and improving user experience, there are obvious deficiencies.

[0003] Traditional piggy banks lack interactivity and fun. Specifically, the piggy bank only serves as a container for storing coins, without providing any form of interactive experience, such as lighting effects, sound feedback, etc. In addition, traditional piggy banks cannot accurately identify coins, and the degree of intelligence is relatively low. It can be seen that this single function limits their ability to attract users, especially the interest of young users and children, and reduces the habit of users to persist in using piggy banks for a long time. Utility Model Content

[0004] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0005] Embodiments of the present disclosure provide a piggy bank, the piggy bank includes:

[0006] A control chip circuit having multiple different pins;

[0007] An oscillator connected to the oscillator pin of the control chip circuit;

[0008] A night light connected to the light control pin of the control chip circuit for emitting light according to the control signal output by the control chip circuit;

[0009] A microphone circuit connected to the voice input pin of the control chip circuit for receiving user voice and converting the user voice into an audio signal and then transmitting it to the control chip circuit;

[0010] A speaker circuit connected to the voice output pin of the control chip circuit for emitting corresponding sounds externally according to the sound signal output by the control chip circuit;

[0011] A coin recognition circuit, the coin recognition circuit includes 3 different coin recognition branches, each coin recognition branch is provided with a switch, and the 3 coin recognition branches are respectively connected to 3 different coin control pins of the control chip circuit.

[0012] In some embodiments, the night light includes a triode and a lamp bead circuit, and the lamp bead circuit includes a plurality of parallel-connected LED lamp beads;

[0013] The base of the triode is connected to the light control pin of the control chip circuit, the collector of the triode is connected to the lamp bead circuit, and the emitter of the triode is connected to the ground terminal. The triode is used to control the light emission of each LED lamp bead in the lamp bead circuit according to the control signal output by the control chip circuit.

[0014] In some embodiments, the microphone circuit includes a microphone and a π-shaped circuit. The microphone is connected to the voice input pin of the control chip circuit through the π-shaped circuit; the microphone is used to receive the user's voice and convert the user's voice into an audio signal, and the π-shaped circuit is used to sample the audio signal and then transmit it to the control chip circuit.

[0015] In some embodiments, the speaker circuit includes an audio power amplifier chip and a speaker;

[0016] The audio power amplifier chip is respectively connected to the control chip circuit and the speaker. The audio power amplifier is used to control the speaker to emit corresponding sounds according to the sound signal output by the control chip circuit.

[0017] In some embodiments, the money box further includes a status indication circuit, and the status indication circuit is connected to the status output pin of the control chip circuit.

[0018] In some embodiments, the status indication circuit includes two status indication branches. The colors of the indicator lights in the two status indication branches are different, and the two status indication branches are respectively connected to two different status output pins of the control chip circuit.

[0019] In some embodiments, the money box further includes a key circuit, and the key circuit is connected to the key drive pin of the control chip circuit.

[0020] In some embodiments, the key circuit includes multiple keys with different functions, and the multiple keys with different functions are respectively connected to multiple different key drive pins of the control chip circuit.

[0021] In some embodiments, the money box further includes an antenna circuit, and the antenna circuit is connected to the antenna drive pin of the control chip circuit.

[0022] The money box provided by the embodiments of the present disclosure can achieve the following technical effects:

[0023] The money box provided by the embodiments of the present disclosure integrates a control chip circuit, a night light, a microphone circuit, a speaker circuit, and a coin recognition circuit. Through the microphone circuit and the speaker circuit, voice interaction with the user can be realized, and the opening and closing of the night light can be controlled based on voice, increasing the convenience of use. In addition, the coin recognition circuit is designed to include 3 different coin recognition branches, which can more accurately identify coins of different denominations and improve the intelligent level of the money box.

[0024] The above general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0026] Figure 1 A schematic diagram of a piggy bank in the related art is shown;

[0027] Figure 2 is a schematic diagram of a control chip circuit provided by an embodiment of the present disclosure;

[0028] Figure 3 is a schematic diagram of a coin recognition circuit provided by an embodiment of the present disclosure;

[0029] Figure 4 is a schematic diagram of a night light provided by an embodiment of the present disclosure;

[0030] Figure 5 is a schematic diagram of a microphone circuit provided by an embodiment of the present disclosure;

[0031] Figure 6 is a schematic diagram of a speaker circuit provided by an embodiment of the present disclosure;

[0032] Figure 7 is a schematic diagram of a status indication circuit provided by an embodiment of the present disclosure;

[0033] Figure 8 is a schematic diagram of a key circuit provided by an embodiment of the present disclosure;

[0034] Figure 9 is a schematic diagram of an antenna circuit provided by an embodiment of the present disclosure;

[0035] Figure 10 is a schematic diagram of a power supply circuit provided by an embodiment of the present disclosure.

[0036] REFERENCE NUMERALS:

[0037] 1 - control chip circuit, 2 - oscillator, 3 - night light, 4 - microphone circuit;

[0038] 5 - speaker circuit, 6 - coin recognition circuit, 7 - status indication circuit;

[0039] 8 - key circuit, 9 - antenna circuit, 10 - power supply circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0041] The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data may be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0042] In the embodiments of the present disclosure, the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] In addition, the terms "arranged", "connected", "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances. In the embodiments of the present disclosure, a communication connection includes an electrical connection for realizing the transmission of electrical signals and also includes an optical fiber connection for realizing the transmission of optical signals. Without departing from the inventive concept of the embodiments of the present disclosure, the communication connection can be a wired connection or a wireless connection.

[0044] Unless otherwise specified, the term "plurality" means two or more.

[0045] In the embodiments of the present disclosure, the character " / " indicates an "or" relationship between the preceding and following objects. For example, A / B means: A or B.

[0046] The term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B, these three relationships.

[0047] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0048] The embodiments of the present disclosure provide a piggy bank, combined with Figure 1 As shown, the piggy bank includes a control chip circuit 1, a crystal oscillator 2, a night light 3, a microphone circuit 4, a speaker circuit 5, and a coin recognition circuit 6. It can be understood that the above components are all arranged in the tank body of the piggy bank (not shown in the figure).

[0049] The control chip circuit 1 has multiple different pins. The crystal oscillator 2 is connected to the crystal oscillator pin of the control chip circuit 1. The night light 3 is connected to the light control pin of the control chip circuit 1 and is used to emit light according to the control signal output by the control chip circuit 1. The microphone circuit 4 is connected to the voice input pin of the control chip circuit 1 and is used to receive the user's voice and convert the user's voice into an audio signal and then transmit it to the control chip circuit 1. The speaker circuit 5 is connected to the voice output pin of the control chip circuit 1 and is used to emit corresponding sounds externally according to the sound signal output by the control chip circuit 1. The coin recognition circuit 6 includes 3 different coin recognition branches. Each coin recognition branch is provided with a switch, and the 3 coin recognition branches are respectively connected to 3 different coin control pins of the control chip circuit 1.

[0050] The piggy bank provided by the embodiments of the present disclosure integrates a control chip circuit, a night light, a microphone circuit, a speaker circuit, and a coin recognition circuit. Through the microphone circuit and the speaker circuit, voice interaction with the user can be realized, and the opening and closing of the night light can be controlled based on voice, increasing the convenience of use. In addition, the coin recognition circuit is designed to include 3 different coin recognition branches, which can more accurately identify coins of different denominations and improve the intelligence level of the piggy bank.

[0051] As Figure 2As shown, the control chip circuit 1 includes a control chip U1 and a power supply part. The control chip U1 has multiple different pins. The pin DACR / PB11 serves as the right-channel output of the digital-to-analog converter and is used to drive the speaker. The pin DACL serves as the left-channel output of the digital-to-analog converter and is used to drive the speaker. The pins AVSS and DVSS serve as analog grounds and are used to isolate the analog and digital parts. It can be used to control external devices or receive data. The pin LDOIN / PB5 serves as the input of the low-dropout regulator and is used to supply power to the internal circuit of the chip. The pin VBAT serves as the backup power input. The pin BTAVDD serves as the power pin for Bluetooth audio. The pins PA0 to PA4, the pin PB1, the pin PB3, the pin PB8, the pin PB9, the pin PB10, and the pins PC3 to PC7 are all general-purpose I / O ports. The pins USBDP and USBDM are the positive and negative USB data and are used to communicate with USB devices. The pin BT_RF is the Bluetooth RF signal output and is used to send and receive wireless signals. The pins BT_OSIC and BT_OSCO serve as the input and output corresponding to the oscillator 2 and are used to provide an accurate clock signal to the control chip circuit 1. The power supply part includes capacitors C4, C5, C6, and C7. Capacitors C4 and C5 form a power supply decoupling network and are used to remove high-frequency noise on the power line. Capacitors C6 and C7 form another power supply decoupling network and are used for finer power filtering. VCC represents the main power input and provides energy for the entire circuit. VDDIO represents the internal power pin and is used to supply power to certain specific pins.

[0052] Combined with 2 and Figure 3 As shown, the switches of the 3 different coin recognition branches of the coin recognition circuit 6 are the switch K1, the switch K2, and the switch K3 respectively. The pins PB3, PB8, and PB9 serve as coin control pins, and the 3 coin recognition branches are respectively connected to the pins PB3, PB8, and PB9. Among them, the 3 different coin recognition branches are respectively used to recognize 0.1 yuan coins, 0.5 yuan coins, and 1 yuan coins.

[0053] In some embodiments, combined with Figure 4 As shown, the night light 3 includes a triode Q2 and a lamp bead circuit. The lamp bead circuit includes multiple parallel-connected LED lamp beads. For example, the multiple parallel-connected LED lamp beads are specifically lamp beads D1 to D8. The base of the triode Q2 is connected to the light control pin of the control chip circuit 1. The collector of the triode Q2 is connected to the lamp bead circuit. The emitter of the triode Q2 is connected to the ground terminal. The triode Q2 is used to control the light emission of each LED lamp bead in the lamp bead circuit according to the control signal output by the control chip circuit 1.

[0054] Combined with Figure 2 and Figure 4As shown, the pin PB10 is a lighting control pin, and the base of the triode Q2 is connected to the pin PB10 of the control chip circuit 1. Optionally, the night light 3 further includes a resistor R1, and the base of the triode Q2 is connected to the pin PB10 of the control chip circuit 1 through the resistor R1. The night light 3 further includes a resistor R2, and the lamp bead circuit is connected to the power supply through the resistor R2.

[0055] In some embodiments, in combination with Figure 2 and Figure 5 As shown, the microphone circuit 4 includes a microphone J4 and a π-shaped circuit. The microphone J4 is connected to the voice input pin of the control chip circuit 1 through the π-shaped circuit. The microphone J4 is used to receive the user's voice and convert the user's voice into an audio signal, and the π-shaped circuit is used to sample the audio signal and then transmit it to the control chip circuit 1. Here, the pins PC6 and PC7 serve as voice input pins, and the π-shaped circuit is connected to the pins PC6 and PC7.

[0056] In the embodiments of the present disclosure, the resistor R5, the capacitor C1, the resistor R6, the capacitor C2, and the capacitor C3 form a π-shaped circuit, and the resistor R7 is used to separate the analog ground of the input signal of the microphone circuit 4 from other digital grounds to reduce interference.

[0057] In some embodiments, in combination with Figure 2 and Figure 6 As shown, the speaker circuit 5 includes an audio power amplifier chip U2 and a speaker LS1. The audio power amplifier chip U2 is respectively connected to the control chip circuit 1 and the speaker LS1. The audio power amplifier U2 is used to control the speaker LS1 to emit corresponding sounds according to the sound signal output by the control chip circuit 1. The voice output pin is connected as the pin DACR, and the audio power amplifier chip U2 is connected to the pin DACR.

[0058] In the audio power amplifier chip U2, the pin EN is a switch control pin. When this pin is at a high level, the audio amplifier starts to work; when this pin is at a low level, the audio amplifier stops working. The pin IN+ is used to receive the positive half cycle of the audio signal. When the audio signal is applied to this pin, it will be amplified by the internal amplifier. The pin IN- receives the negative half cycle of the audio signal. When the audio signal is applied to this pin, it will be amplified by the internal amplifier. The pin GND is used for grounding. The pin VO2 is connected to the positive pole SPK+ of the speaker LS1, and the pin VO1 is connected to the negative pole SPK- of the speaker LS1. The pin VDD is a power supply pin and is used to connect to the main power input VCC. The pin EN is connected to the internal power supply pin VDDIO.

[0059] Optionally, the speaker circuit 5 further includes capacitors C12 and C13, and the capacitors C12 and C13 are filter capacitors for the power supply of the audio power amplifier chip U2 to suppress noise.

[0060] Optionally, the speaker circuit 5 further includes a resistor R9 and a resistor R10, which are used to set the gain amplification factor of the audio power amplifier chip U2.

[0061] Optionally, the speaker circuit 5 further includes a capacitor C11, which is a coupling capacitor for the audio input of the audio power amplifier chip U2.

[0062] Optionally, the speaker circuit 5 further includes a resistor R8, which is a pull-up resistor. The resistor R8 is used to provide a stable voltage to the pin EN.

[0063] Optionally, the speaker circuit 5 further includes a capacitor C10, which is used to suppress the switching noise of the audio power amplifier chip U2.

[0064] Optionally, the speaker circuit 5 further includes a resistor R11, which is used to isolate and distinguish the digital ground from the analog ground.

[0065] In some embodiments, as shown in Figure 1 the piggy bank further includes a status indication circuit 7, and the status indication circuit 7 is connected to the status output pin of the control chip circuit 1.

[0066] In some embodiments, as shown in Figure 2 and Figure 7 the status indication circuit 7 includes two status indication branches, and the colors of the indicator lights in the two status indication branches are different. The indicator lights in the two status indication branches are an indicator light D9 and an indicator light D10 respectively. Among them, the indicator light D9 is red and the indicator light D10 is green. The two status indication branches are respectively connected to two different status output pins of the control chip circuit 1. Specifically, the pins PA3 and PA4 are used as status output pins, the indicator light D9 is connected to the pin PA3, and the indicator light D10 is connected to the pin PA4.

[0067] Optionally, the status indication circuit 7 further includes a resistor R3 and a resistor R4. The indicator light D9 is connected to the internal power supply pin VDDIO through the resistor R3, and the indicator light D10 is connected to the internal power supply pin VDDIO through the resistor R4. The resistor R3 is used to limit the magnitude of the passing current of the indicator light D9, and the resistor R4 is used to limit the magnitude of the passing current of the indicator light D10.

[0068] In some embodiments, as shown in Figure 1 the piggy bank further includes a key circuit 8, and the key circuit 8 is connected to the key driving pin of the control chip circuit 1.

[0069] In some embodiments, as shown in Figure 2 and Figure 8As shown, the key circuit 8 includes multiple keys with different functions, and the multiple keys with different functions are respectively connected to multiple different key driving pins of the control chip circuit 1. The multiple keys with different functions are respectively the key SW1, the key SW2, and the key SW3. The key SW1 is a mute key, the key SW2 is a setting key, and the key SW3 is an OK key. The pins PC3, PC4, and PC5 are key driving pins. The key SW1 is connected to the pin PC3, the key SW2 is connected to the pin PC4, and the key SW3 is connected to the pin PC5.

[0070] In some embodiments, in combination with Figure 1 As shown, the money box further includes an antenna circuit 9, and the antenna circuit 9 is connected to the antenna driving pin of the control chip circuit 1.

[0071] In some embodiments, in combination with Figure 2 and Figure 9 As shown, the antenna circuit 9 includes an antenna ANT, an inductor L1, an inductor L2, and a capacitor C9. The pin BT_RF is an antenna driving pin, and the antenna ANT is connected to the pin BT_RF through the capacitor C9.

[0072] In some embodiments, in combination with Figure 2 and Figure 10 As shown, the money box further includes a power supply circuit 10. The power supply circuit 10 includes a socket DC. One path of the socket DC is connected to the audio power amplifier chip U2 to provide a power supply voltage for driving the speaker LS1 to emit sound and provide energy, and one path of the audio power amplifier chip U2 is connected to the control chip U1 to provide a working voltage. The socket DC can supply electrical energy to other components through the audio power amplifier chip U2.

[0073] Optionally, the power supply circuit 10 further includes a capacitor C8, and the capacitor C8 is used for input power supply filtering.

[0074] Next, the voice usage scenarios of the money box provided by the embodiments of the present disclosure will be introduced.

[0075] When the indicator light D9 is in the lit state, it indicates that the money box is currently in the sleep mode and needs to be woken up first. The user says "Xiaozhi Xiaozhi" roughly in the direction of the microphone J4. After the microphone J4 receives the sound signal, through the sampling circuit composed of the resistor R6, resistor R5, capacitor C1, capacitor C2, and capacitor C3, the sound signal is input into the control chip U1 as an analog signal through the pins PC6 and PC7 of the control chip U1. Inside the control chip U1, the digital-to-analog conversion module converts the analog signal into a digital signal, then arranges the digital signal into corresponding data, and identifies its content through the speech recognition algorithm. If the recognized word is the wake-up word "Xiaozhi Xiaozhi", the indicator light D9 goes out and the indicator light D10 lights up, indicating that command words can be recognized at this time. The 22nd pin of the control chip U1 outputs a high level to the 1st pin of the audio power amplifier chip U2 to turn on the function of amplifying the audio signal. The 1st pin of the control chip U1 outputs a digital audio signal to the 4th pin of the audio power amplifier chip U2 for input. After the audio power amplifier chip U2 amplifies the audio signal through two operational amplifiers integrated inside, the amplified audio signal is output to the speaker LS1 through the 8th pin and 5th pin of the audio power amplifier chip U2, and the speaker LS1 vibrates to broadcast the sound "I'm here".

[0076] The user says "Query amount" roughly in the direction of the microphone J4, and the same processing is performed through the microphone J4 to recognize the content of its command word.

[0077] After the control chip U1 recognizes the "Query amount" instruction, by querying the record information stored inside the control chip U1, the audio signal is amplified by the audio power amplifier chip U2 to broadcast the stored corresponding current amount.

[0078] The control chip U1 can pre-enter one hundred command words, and can directly and quickly set the required mode or content through the voice operation method, use the voice interaction function to achieve timed reminders for savings to help users develop corresponding habits, and set corresponding simple question-and-answer calculation functions.

[0079] Next, the scenario of the money box being interconnected with the mobile phone provided by the present disclosure embodiment will be introduced.

[0080] Long press the button SW2 for 10 seconds until the indicator lights D9 and D10 are both constantly on, and the speaker LS1 broadcasts "Enter the Bluetooth pairing state".

[0081] Use the mobile phone to perform Bluetooth pairing settings. The control chip U1 emits a wireless signal through BT_RF, which is sent out through the capacitor C9 and the antenna ANT to interact with the mobile phone wireless signal.

[0082] After the mobile phone is successfully paired with the money box, the indicator lights D9 and D10 return to their original states, and the speaker LS1 broadcasts "Pairing successful". At this time, the device reminder function time can be set through the mobile phone.

[0083] The following describes the principle of identifying the amount of coins inserted into the money box provided by the embodiments of the present disclosure.

[0084] The inserted coins are used to identify the corresponding coin sizes through the switches K1, K2, and K3, and the pins DCAR, PB8, and PB3 of the corresponding control chip U1 identify the corresponding low-level signals.

[0085] After reading the corresponding low-level signals, they are processed by the control chip U1, and the corresponding coin amount is broadcast through the speaker LS1, and the corresponding total amount is also broadcast.

[0086] The above description and the drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A piggy bank, characterized in that: include: A control chip circuit having a plurality of different pins; A crystal oscillator, connected to the crystal oscillator pin of the control chip circuit; A night light, connected to the light control pin of the control chip circuit, for emitting light according to the control signal output by the control chip circuit; A microphone circuit is connected to the voice input pin of the control chip circuit, and is used to receive the user's voice, and convert the user's voice into an audio signal and transmit it to the control chip circuit; A speaker circuit is connected to the voice output pin of the control chip circuit and is used to emit corresponding sounds according to the sound signal output by the control chip circuit; The coin recognition circuit includes three different coin recognition branches, each of which is provided with a switch, and the three coin recognition branches are respectively connected to three different coin control pins of the control chip circuit.

2. The piggy bank according to claim 1, characterized in that: The night light includes a triode and a lamp bead circuit, and the lamp bead circuit includes a plurality of LED lamp beads connected in parallel; The base of the transistor is connected to the light control pin of the control chip circuit, the collector of the transistor is connected to the lamp bead circuit, the emitter of the transistor is connected to the ground terminal, and the transistor is used to control the light emission of each LED lamp bead in the lamp bead circuit according to the control signal output by the control chip circuit.

3. The piggy bank according to claim 1, characterized in that: The microphone circuit includes a microphone and a π-type circuit. The microphone is connected to the voice input pin of the control chip circuit through the π-type circuit. The microphone is used to receive the user's voice and convert the user's voice into an audio signal. The π-type circuit is used to sample the audio signal and transmit it to the control chip circuit.

4. The piggy bank according to claim 1, characterized in that: The speaker circuit includes an audio power amplifier chip and a speaker; The audio power amplifier chip is connected to the control chip circuit and the speaker respectively. The audio power amplifier is used to control the speaker to emit corresponding sound according to the sound signal output by the control chip circuit.

5. The piggy bank according to claim 1, characterized in that: It also includes a state indicating circuit, which is connected to the state output pin of the control chip circuit.

6. The piggy bank according to claim 5, characterized in that: The state indication circuit comprises two state indication branches, the indicator lights in the two state indication branches have different colors, and the two state indication branches are respectively connected to two different state output pins of the control chip circuit.

7. The piggy bank according to claim 1, characterized in that: It also includes a key circuit, which is connected to the key driving pin of the control chip circuit.

8. The piggy bank according to claim 7, characterized in that: The key circuit includes a plurality of keys with different functions, and the plurality of keys with different functions are respectively connected to a plurality of different key driving pins of the control chip circuit.

9. The piggy bank according to claim 1, characterized in that: It also includes an antenna circuit, which is connected to the antenna driving pin of the control chip circuit.

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