Speed regulation and positive and negative rotation control circuit of electric grinder

Abstract

The utility model discloses a speed regulation and positive and negative rotation control circuit of an electric grinder, which comprises a power supply circuit, a driving circuit and a control circuit, the control circuit is respectively connected with the power supply circuit and the driving circuit, and the power supply circuit comprises a charging circuit, a power supply circuit and a power supply protection circuit. The power supply protection circuit is used for protecting the power supply circuit, the charging circuit and the power supply protection circuit are respectively connected with the control circuit, the control circuit comprises a main control circuit and a handstand sensor, and the main control circuit is respectively connected with the handstand sensor, the charging circuit, the power supply protection circuit and the driving circuit. And the driving circuit is connected with a motor. According to the utility model, stepless speed regulation can be realized, more accurate and stable operation can be realized, automatic reverse operation can be carried out under the condition that the cost of any component is not increased, foreign matters clamped in the grinding groove can be withdrawn, and the use requirements can be better met.

Description

Technical Field

[0001] This utility model relates to the field of electric grinder technology, and in particular to a speed adjustment and forward / reverse control circuit for an electric grinder. Background Technology

[0002] It is known that people often use powdered ingredients or seasonings, such as coffee powder, pepper powder, and black pepper powder. To preserve the best flavor of the ingredients, the raw materials are often ground just before use, which led to the development of grinders. Currently, grinders on the market are divided into manual grinders and electric grinders, with electric grinders being particularly popular among users.

[0003] Most electric grinders on the market currently use a single speed of either high or low, without any speed adjustment function. Since grinders are mainly used for grinding seasonings such as salt and pepper, the grinding head and grinding speed determine the coarseness of the finished product. This led to the development of a Chinese utility model patent (CN116599391B) that discloses an electric grinder, its speed adjustment circuit, and its control method. By incorporating an inductive switch S2 in the control circuit, the electric grinder can only be used when the machine is inverted, facilitating user operation. Simultaneously, a gear selector switch S1 in the control circuit allows for two speed settings: high and low. While this allows for grinding at different speeds, most existing models use stepped speed regulation, which cannot meet the requirements for precise and stable operation. Furthermore, current models cannot control forward and reverse rotation, frequently resulting in foreign objects jamming the grinding mechanism. The common method is to pry open the machine and manually remove the foreign object, which not only damages the grinder's structure and appearance but is also time-consuming and laborious. In view of the above-mentioned defects, it is necessary to modify the existing technology. Utility Model Content

[0004] (a) Technical problems that need to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a speed regulation and forward / reverse control circuit for an electric grinder. It can achieve stepless speed regulation, enabling more precise and stable operation. Furthermore, without increasing the cost of any additional components, it can automatically reverse, which helps to remove foreign objects stuck in the grinding tank, extending its service life and better meeting the user's needs.

[0006] (II) Technical solutions required

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A speed regulation and forward / reverse control circuit for an electric grinder includes a power supply circuit, a drive circuit, and a control circuit. The control circuit is connected to both the power supply circuit and the drive circuit. The power supply circuit includes a charging circuit, a power supply circuit, and a power protection circuit. The power protection circuit is used to protect the power supply circuit. The charging circuit and the power protection circuit are respectively connected to the control circuit. The control circuit includes a main control circuit and an inversion sensor. The main control circuit is connected to the inversion sensor, the charging circuit, the power protection circuit, and the drive circuit. The drive circuit is connected to a motor.

[0009] Preferably, the power supply circuit is connected to a power source, which is a lithium battery.

[0010] Preferably, the charging circuit includes a first integrated chip U1 and a charging interface J1. One end of the charging interface J1 is connected to a first resistor R1 and a first capacitor C1, both of which are grounded. The other end of the charging interface J1 is connected to the fourth pin of the first integrated chip U1. The eighth pin of the first integrated chip U1 is connected to a sixteenth resistor R16. The second pin of the first integrated chip U1 is connected to a second resistor R2, which is grounded. The fifth pin of the first integrated chip U1 is connected to a second capacitor C2, which is connected to the power supply circuit, which is connected to a power source.

[0011] Preferably, the power protection circuit includes a third integrated chip U3 and a fourth integrated chip U4. The first pin of the third integrated chip U3 and the first pin of the fourth integrated chip U4 are connected. The first pin of the third integrated chip U3 is connected to a thirteenth resistor R13. One end of the thirteenth resistor R13 is connected to the power supply, and the other end of the thirteenth resistor R13 is connected to a sixth capacitor C6. The power supply and the sixth capacitor C6 are connected to the power supply.

[0012] Preferably, the main control circuit includes a second integrated chip U2 and a battery socket J2. The first pin of the second integrated chip U2 is connected to a power supply and a fifth capacitor C5, which is grounded. The second pin of the second integrated chip U2 is connected to a third resistor R3. The third resistor R3 is connected to the first pin of the battery socket J2. The battery socket J2 is connected to a lamp holder, on which a lamp is mounted. The second pin of the battery socket J2 is connected to a power supply, which powers the lamp. The third pin of the second integrated chip U2... The first pin connects to a forward / reverse position switch. The fifth pin of the second integrated chip U2 is connected to transistors Q1 and Q3. The third pins of transistors Q1 and Q3 are connected and then connected to the motor mount J3. The second pin of transistor Q1 is connected to the power supply. The sixth pin of the second integrated chip U2 connects to transistors Q2 and Q4. The second pin of transistor Q2 is connected to the power supply. The second pin of transistor Q3 is connected to the second pin of transistor Q2. The second pin is connected to the twelfth resistor R12. The sixth pin of the second integrated chip U2 is connected to the first pin of the transistor Q2 and the first pin of the transistor Q4. The first and second pins of the motor mount J3 are connected to the ninth capacitor C9 to protect the motor. The ninth pin of the second integrated chip U2 is connected to the charging circuit through the seventh resistor R7. The tenth pin of the second integrated chip U2 is connected to the twelfth resistor R12 through the tenth resistor R17. The eleventh pin of the second integrated chip U2 is connected to the third lamp LED3 through the sixth resistor R6. The third lamp LED3 is connected to a power source. The twelfth pin of the second integrated chip U2 is connected to the first lamp LED1 and the second lamp LED2. The twelfth pin of the second integrated chip U2 is connected to the charging circuit through the eighth resistor R8. The thirteenth pin of the second integrated chip U2 is connected to the fourth resistor R4 and the fifth resistor R5. The fourth resistor R4 is connected to the first lamp LED1, and the fifth resistor R5 is connected to the second lamp LED2. The fourteenth pin of the second integrated chip U2 is used for grounding.

[0013] In addition, this utility model also provides a speed adjustment and forward / reverse control circuit for an electric grinder, including the following steps:

[0014] S1. Install the speed adjustment and forward / reverse control circuit of the electric grinder in the electric grinder, and install a button on the electric grinder for connecting the speed adjustment and forward / reverse control circuit of the electric grinder.

[0015] S2. By clicking the button, the main control circuit is activated, causing the drive circuit to drive the motor to rotate forward. The motor will then make the electric grinder start working. At this time, the second light LED2 in the main control circuit will be constantly blue. Pressing the button again will cause the main control circuit to drive the motor to rotate in reverse. Alternatively, by clicking the button, the main control circuit is activated, causing the drive circuit to drive the motor to rotate forward. After the motor starts, pressing and holding the button again will switch between fast and slow speeds. In the slow speed mode, the first light LED1 will be constantly green.

[0016] (III) Technical Effects to be Achieved

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Firstly, the power supply circuit of this utility model includes a charging circuit, a power supply circuit, and a power protection circuit. The power protection circuit is used to protect the power supply circuit. The charging circuit and the power protection circuit are respectively connected to a control circuit. The control circuit includes a main control circuit and an inversion sensor. The main control circuit is respectively connected to the inversion sensor, the charging circuit, the power protection circuit, and the drive circuit. The drive circuit is connected to a motor, which can achieve stepless speed regulation, enabling more precise and stable operation. Moreover, it automatically reverses during use without increasing the cost of any components, which is beneficial for removing foreign objects stuck in the grinding tank, improving service life, and better meeting the user's needs.

[0019] Secondly, this utility model is extremely simple and convenient to operate, which is conducive to speed adjustment and control of forward and reverse rotation, and is more conducive to meeting the needs of modern users. Attached Figure Description

[0020] Figure 1 This is a block diagram of the speed adjustment and forward / reverse rotation control circuit of an electric grinder according to the present invention.

[0021] Figure 2 This is a block diagram of the speed adjustment and forward / reverse rotation control circuit of an electric grinder according to the present invention.

[0022] Figure 3 This is a schematic diagram of the charging circuit in the speed regulation and forward / reverse rotation circuit of an electric grinder according to this utility model.

[0023] Figure 4 This is a schematic diagram of the main control circuit in the speed regulation and forward / reverse control circuit of an electric grinder according to this utility model.

[0024] Figure 5 This is a schematic diagram of the power protection circuit in the speed regulation and forward / reverse control circuit of an electric grinder according to this utility model.

[0025] Figure 6This is a schematic diagram of the transistor circuit in the main control circuit of the speed regulation and forward / reverse control circuit of an electric grinder according to this utility model. Detailed Implementation

[0026] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0027] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0030] Example 1: See Figure 1 A speed regulation and forward / reverse control circuit for an electric grinder includes a power supply circuit, a drive circuit, and a control circuit. The control circuit is connected to both the power supply circuit and the drive circuit. Figure 2 As shown, the power supply circuit includes a charging circuit, a power supply circuit, and a power protection circuit. The power protection circuit is used to protect the power supply circuit. The charging circuit and the power protection circuit are respectively connected to the control circuit. The control circuit includes a main control circuit and an inversion sensor. The main control circuit is connected to the inversion sensor, the charging circuit, the power protection circuit, and the drive circuit. The drive circuit is connected to the motor. This configuration is reasonable. The main control circuit is conducive to realizing speed control of the drive circuit, which is conducive to realizing speed regulation control of the motor by the drive circuit. The combination of the main control circuit and the inversion sensor is conducive to realizing forward and reverse control of the motor through the drive circuit, which is more conducive to meeting the usage requirements.

[0031] Example 2: Based on Example 1, the power supply circuit is connected to a power source, which is a lithium battery. This facilitates charging and makes it convenient to use.

[0032] Example 3: This can be described based on Example 1 or Example 2, such as... Figure 3 As shown, the charging circuit includes a first integrated chip U1 and a charging interface J1. One end of the charging interface J1 is connected to a first resistor R1 and a first capacitor C1, both of which are grounded. The other end of the charging interface J1 is connected to pin 4 of the first integrated chip U1. Pin 8 of the first integrated chip U1 is connected to a sixteenth resistor R16. Pin 2 of the first integrated chip U1 is connected to a second resistor R2, which is grounded. Pin 5 of the first integrated chip U1 is connected to a second capacitor C2. The second capacitor C2 is connected to a power supply circuit, which is connected to a battery, preferably a lithium battery. The second capacitor C2 facilitates filtering, thus improving charging efficiency. Further explanation is provided below. Figure 5 As shown, the power protection circuit includes a third integrated chip U3 and a fourth integrated chip U4. The first pin of the third integrated chip U3 and the first pin of the fourth integrated chip U4 are connected. The first pin of the third integrated chip U3 is connected to a thirteenth resistor R13. One end of the thirteenth resistor R13 is connected to the power supply (power supply +, power supply positive terminal, which is beneficial for power supply). The other end of the thirteenth resistor R13 is connected to a sixth capacitor C6. The power supply and the sixth capacitor C6 are connected. The sixth capacitor C6 is connected to the power supply (power supply -, power supply negative terminal), which is beneficial for filtering. The power supply is connected to a fourth relay J4.

[0033] Example 4: This can be described based on Example 1, Example 2, or Example 3, such as... Figure 4 and Figure 6As shown, the main control circuit includes a second integrated chip U2 and a battery socket J2. The first pin of the second integrated chip U2 is connected to the power supply (power supply +, positive terminal) and the fifth capacitor C5. The fifth capacitor C5 is grounded for filtering purposes. The second pin of the second integrated chip U2 is connected to the third resistor R3, which is connected to the first pin of the battery socket J2. The battery socket J2 is connected to a lamp holder, on which a lamp is mounted. The second pin of the battery socket J2 is connected to the power supply (power supply +, positive terminal), which powers the lamp. The third pin of the second integrated chip U2 is connected to a forward / reverse position switch (also called a forward / reverse switch or a clockwise / reverse switch). The fifth pin of the second integrated chip U2 is connected to a three-pole... Transistor Q1 (pin 1) and transistor Q3 (pin 1) are connected together. Pins 3 of transistors Q1 and Q3 are connected to the motor mount J3 (pin 2). Pin 2 of transistor Q1 is connected to the power supply (power +, positive terminal). Pin 6 of the second integrated chip U2 is connected to transistors Q2 (pin 1) and Q4 (pin 1). Pin 2 of transistor Q2 is connected to the power supply (power +, positive terminal). Pin 2 of transistor Q3 is connected to pin 2 of transistor Q2. Pin 2 of transistor Q3 and pin 2 of transistor Q2 are then connected to the twelfth resistor R1. 2 (used for detection), pin 6 of the second integrated chip U2 is connected to pin 1 of transistor Q2 and pin 1 of transistor Q4 respectively. Pins 1 and 2 of motor mount J3 are connected to capacitor C9 (the ninth capacitor) to protect the motor. Pin 9 of the second integrated chip U2 is connected to the charging circuit (pin 6 of the first integrated chip U1 in the charging circuit) through resistor R7 (the seventh resistor). Pin 10 of the second integrated chip U2 is connected to resistor R12 (used for sampling) through resistor R17 (the tenth resistor). Pin 11 of the second integrated chip U2 is connected to the third lamp LED3 (the negative terminal of LED3) through resistor R6 (the sixth resistor). The third lamp LED3 (the positive terminal of LED3) is connected to a capacitor... The power source (power +, power positive) is connected to the source. The 12th pin of the second integrated chip U2 is connected to the first LED1 (the positive terminal of the first LED1) and the second LED2 (the negative terminal of the second LED2). The 12th pin of the second integrated chip U2 is connected to the charging circuit (the fourth pin of the first integrated chip U1 in the charging circuit) through the eighth resistor R8. The 13th pin of the second integrated chip U2 is connected to the fourth resistor R4 and the fifth resistor R5. The fourth resistor R4 is connected to the first LED1 (the negative terminal of the first LED1), and the fifth resistor R5 is connected to the second LED2 (the positive terminal of the second LED2). The 14th pin of the second integrated chip U2 is used for grounding.

[0034] To further explain, the third light, LED3, is red when it is lit, indicating that it is charging. The second light, LED2, is blue and always on. When a power source is connected to the power circuit, and the power source is a lithium battery, the power source will be fully charged. When the third light, LED3, is off, the charging process is complete.

[0035] Example 4: Based on Example 1, Example 2, or Example 3, a method for controlling the speed adjustment and forward / reverse rotation circuit of an electric grinder is also provided, characterized by the following steps:

[0036] S1. Install the speed adjustment and forward / reverse control circuit of the electric grinder in the electric grinder, and install a button on the electric grinder for connecting the speed adjustment and forward / reverse control circuit of the electric grinder.

[0037] S2. By clicking the button, the main control circuit is activated, causing the drive circuit to drive the motor to rotate forward. The motor will then make the electric grinder start working. At this time, the second light LED2 (fast mode) in the main control circuit will be constantly blue. Pressing the button again will cause the main control circuit to drive the motor to rotate in reverse. Alternatively, by clicking the button, the main control circuit is activated, causing the drive circuit to drive the motor to rotate forward. After the motor starts, pressing and holding the button again will switch between fast and slow modes. In slow mode, the first light LED1 (slow mode) will be constantly green.

[0038] This utility model of electric grinder has the following two methods for motor reversal:

[0039] In the first embodiment, after the power switch (button) of the electric grinder is turned on, the main control circuit can preset the motor reversal time. In this embodiment, the motor reverses for 1.5 seconds, which helps to remove unground materials from the grinding tank of the electric grinder, preparing it for normal grinding next time. Alternatively, after the power switch (button) of the electric grinder is turned on, when the electric grinder is placed upside down (easily by rotating it at a certain angle), the inversion sensor is activated. This causes the main control circuit (the third pin of the second integrated chip U2 becomes high) to cause the motor to reverse and enter standby mode, indicating that the electric grinder has entered or exited standby mode. The next time it is used, simply invert the electric grinder to enter working mode. Alternatively, clicking the button activates the main control circuit, causing the drive circuit to drive the motor to rotate forward. After the motor starts, pressing and holding the button for 2 seconds switches between fast and slow working modes.

[0040] The second method involves using current or voltage detection in the electric grinder to reverse the motor. Specifically, when the power protection circuit or the main control circuit in the control circuit detects a current or voltage value greater than a preset value (when the main control circuit (pin 10 of the second integrated chip U2) detects a voltage greater than a set threshold), the control circuit will drive the motor to reverse through the drive circuit. This helps remove foreign objects from the electric grinder. Then, the motor rotates forward. After three cycles, if the voltage detected by the main control circuit (pin 10 of the second integrated chip U2) still cannot drop to the normal value, it is determined that the material being ground is a foreign object, and the machine stops. At this point, the user is prompted to open the storage container in the electric grinder to remove the foreign object. Preferably, when the motor suddenly stops due to the protection circuit (lithium battery) being activated by a rapid high current, the material to be ground may become stuck in the grinding tank because the power is cut off and the motor cannot reverse in time, causing the motor to jam. When the main control circuit (pin 10 of the second integrated chip U2) detects this situation, it will reverse the motor before entering the normal grinding program when the user turns on the machine, effectively solving the problem of similar equipment on the market failing due to this issue.

[0041] This invention allows for the reversal of the electric grinder in various ways, which facilitates timely cleaning of the grinding tank and better meets usage requirements.

[0042] This utility model allows the electric grinder to charge the charging circuit via a data cable. During the charging process, the third light LED3 is red, indicating the charging state, while the second light LED2 is blue and constantly lit. When a power source, which is a lithium battery, is connected to the power circuit, the power supply is fully charged. When the third light LED3 is off, the charging process is complete.

[0043] This invention's first LED1 light source can be infinitely speed-regulated, enabling more precise and stable operation. Furthermore, it monitors the motor current in real time during operation, effectively protecting the motor and equipment from damage due to overcurrent, without increasing the cost of any additional components. In particular, foreign objects frequently jamming the grinding mechanism during the grinding process of electric grinders. The common method is to pry open the equipment and manually remove the foreign object, which not only damages the grinder's structure and appearance but is also time-consuming and labor-intensive. This invention, without increasing the cost of any additional components, automatically reverses the rotation upon detecting a motor jam and removes the foreign object stuck in the grinding groove of the electric grinder upon the next startup, solving a common problem encountered in the use of electric grinders and effectively ensuring the integrity and practicality of the equipment.

[0044] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts and rivets that are mature in the existing technology. The internal components of the inverted sensor and motor adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete normal operation according to the existing technical manual. In addition, the circuit connection adopts conventional connection methods in the existing technology, and will not be described in detail here.

[0045] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A speed regulation and forward / reverse control circuit for an electric grinder, comprising a power supply circuit, a drive circuit, and a control circuit, wherein the control circuit is connected to the power supply circuit and the drive circuit respectively, characterized in that: The power supply circuit includes a charging circuit, a power supply circuit, and a power protection circuit. The power protection circuit is used to protect the power supply circuit. The charging circuit and the power protection circuit are respectively connected to the control circuit. The control circuit includes a main control circuit and an inversion sensor. The main control circuit is respectively connected to the inversion sensor, the charging circuit, the power protection circuit, and the drive circuit. The drive circuit is connected to a motor.

2. The speed regulation and forward / reverse control circuit for the electric grinder as described in claim 1, characterized in that: The power supply circuit is connected to a power source, which is a lithium battery.

3. The speed regulation and forward / reverse control circuit for the electric grinder as described in claim 1 or 2, characterized in that: The charging circuit includes a first integrated chip U1 and a charging interface J1. One end of the charging interface J1 is connected to a first resistor R1 and a first capacitor C1, both of which are grounded. The other end of the charging interface J1 is connected to the fourth pin of the first integrated chip U1. The eighth pin of the first integrated chip U1 is connected to a sixteenth resistor R16. The second pin of the first integrated chip U1 is connected to a second resistor R2, which is grounded. The fifth pin of the first integrated chip U1 is connected to a second capacitor C2, which is connected to the power supply circuit, which is connected to a power source.

4. The speed regulation and forward / reverse control circuit for the electric grinder as described in claim 3, characterized in that: The power protection circuit includes a third integrated chip U3 and a fourth integrated chip U4. The first pin of the third integrated chip U3 and the first pin of the fourth integrated chip U4 are connected. The first pin of the third integrated chip U3 is connected to a thirteenth resistor R13. One end of the thirteenth resistor R13 is connected to the power supply, and the other end of the thirteenth resistor R13 is connected to a sixth capacitor C6. The power supply and the sixth capacitor C6 are connected to the power supply.

5. The speed regulation and forward / reverse control circuit for the electric grinder as described in claim 1, 2, or 4, characterized in that: The main control circuit includes a second integrated chip U2 and a battery socket J2. The first pin of the second integrated chip U2 is connected to a power supply and a fifth capacitor C5, which is grounded. The second pin of the second integrated chip U2 is connected to a third resistor R3, which is connected to the first pin of the battery socket J2. The battery socket J2 is connected to a lamp holder, on which a lamp is mounted. The second pin of the battery socket J2 is connected to a power supply, which powers the lamp. The third pin of the second integrated chip U2 is connected to... The forward / reverse position switch has two transistors connected to pin 5 of the second integrated chip U2: one Q1 and one Q3. The third pins of transistors Q1 and Q3 are connected and then connected to the motor mount J3. The second pin of transistor Q1 is connected to the power supply. The sixth pin of the second integrated chip U2 is connected to transistors Q2 and Q4. The second pin of transistor Q2 is connected to the power supply. The second pin of transistor Q3 is connected to the second pin of transistor Q2. The second pin of transistor Q3 is also connected to the second pin of transistor Q2. Pin 1 is connected to the twelfth resistor R12. Pin 6 of the second integrated chip U2 is connected to pin 1 of transistor Q2 and pin 1 of transistor Q4. Pins 1 and 2 of the motor mount J3 are connected to the ninth capacitor C9 to protect the motor. Pin 9 of the second integrated chip U2 is connected to the charging circuit through the seventh resistor R7. Pin 10 of the second integrated chip U2 is connected to the twelfth resistor R12 through the tenth resistor R17. Pin 11 of the second integrated chip U2 is connected to the third lamp LED3 through the sixth resistor R6. The third lamp LED3 is connected to a power supply. Pin 12 of the second integrated chip U2 is connected to the first lamp LED1 and the second lamp LED2. Pin 12 of the second integrated chip U2 is connected to the charging circuit through the eighth resistor R8. Pin 13 of the second integrated chip U2 is connected to the fourth resistor R4 and the fifth resistor R5. The fourth resistor R4 is connected to the first lamp LED1, and the fifth resistor R5 is connected to the second lamp LED2. Pin 14 of the second integrated chip U2 is used for grounding.

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