Electric mosquito swatter circuit with high safety

Abstract

The invention discloses an electric mosquito swatter circuit with high safety in the field of electric mosquito swatters, which comprises a signal processing circuit, a control circuit, a mechanical button switch circuit and a high voltage generation circuit, the output end of the signal processing circuit and the mechanical button switch circuit are connected with the input end of the control circuit, and the output end of the control circuit is connected with the high voltage generation circuit. The problems that an existing mistaken electric shock electric mosquito swatter is poor in mosquito eradication effect and increases cognitive burden of a user are solved, when a person does not get close to the electric mosquito swatter circuit, the human body infrared induction switch is not activated, the circuit is in a connected state, and a power grid is electrified, so that the electric mosquito swatter can always keep normal high-voltage output, mosquitoes are killed, and the safety of the electric mosquito swatter is improved. The problem that the mosquito killing effect is poor due to voltage reduction is avoided, a user does not need to additionally pay attention to or memorize mistaken touch prevention rules, a circuit system can automatically complete safety protection, and the cognitive burden of the user is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric mosquito rackets, and more specifically, to an electric mosquito racket circuit with high safety. Background Art

[0002] In daily life, as a common mosquito-killing tool, the electric mosquito racket is widely used in environments such as homes and workplaces to help people effectively drive away and eliminate mosquitoes, ensuring the comfort and health of the living environment. However, through a large number of investigations and studies, it has been found that there is a significant pain point for users in currently available electric mosquito rackets, that is, consumers are prone to accidental electric shock during normal use. This not only brings an unpleasant user experience but may also pose a certain threat to personal safety.

[0003] In response to the above problems, major manufacturers have taken a series of improvement measures at the product end, including reducing the working voltage of the electric mosquito racket to reduce the harm caused by accidental electric shock by reducing the voltage; adding a protective cover to physically prevent users from accidentally touching the electric shock part; and adding warning signs to draw users' attention to potential electric shock risks. However, although the method of reducing the voltage reduces the risk of accidental electric shock to a certain extent, it inevitably sacrifices the mosquito-killing effect of the electric mosquito racket, making it difficult to effectively kill mosquitoes; adding a protective cover will limit the hitting range of the electric mosquito racket or affect its usability, and to a certain extent increases the cost and weight of the product; while adding warning signs relies on users' attention and understanding of the signs, undoubtedly increasing the cognitive burden on users and not fundamentally preventing accidental electric shock.

[0004] The above defects need to be solved urgently. Summary of the Invention

[0005] In order to solve the problems of the poor mosquito-killing effect of the existing accidentally electric shock electric mosquito racket and increasing the cognitive burden on users, the present invention provides an electric mosquito racket circuit with high safety.

[0006] The technical solution of the present invention is as follows:

[0007] An electric mosquito racket circuit with high safety includes a signal processing circuit, a control circuit, a mechanical button switch circuit, and a high-voltage generation circuit. The input end of the signal processing circuit is connected to a human body infrared induction switch. The output end of the signal processing circuit and the mechanical button switch circuit are both connected to the input end of the control circuit. The output end of the control circuit is connected to the high-voltage generation circuit;

[0008] The signal processing circuit is used to generate corresponding electrical signal changes when the human body infrared induction switch is activated. The signal processing circuit processes the signal changes generated by the human body infrared induction switch and converts the processed signal into a level signal suitable for the control circuit to recognize;

[0009] The control circuit is used to control the opening and closing of the high-voltage generation circuit according to the input signals of the signal processing circuit and the mechanical button switch circuit.

[0010] In the present invention according to the above solution, the signal processing circuit includes a dual operational amplifier U5 and a dual operational amplifier U6. The third pin of the dual operational amplifier U5 is connected to the human body infrared induction switch. The seventh pin of the dual operational amplifier U5 is connected to the third pin of the dual operational amplifier U6. The seventh pin of the dual operational amplifier U6 is connected to the input end of the control circuit.

[0011] In the present invention according to the above solution, the control circuit includes a control chip U2. The fourteenth pin of the control chip U2 is connected to the signal processing circuit. The twelfth pin of the control chip U2 is connected to the high-voltage generation circuit. The second pin, the third pin, and the third pin of the control chip U2 are all connected to the mechanical button switch circuit.

[0012] In the present invention according to the above solution, the mechanical button switch circuit includes a mechanical button S2 and a three-way switch S1. One end of the mechanical button S2 is connected to one end of the three-way switch S1. The other end of the mechanical button S2 and the other end of the three-way switch S1 are both connected to the control circuit.

[0013] In the present invention according to the above solution, the high-voltage generation circuit includes a MOS transistor Q2, a triode Q1, and a transformer T1. The G pole of the MOS transistor Q2 is connected to the control circuit. The G pole of the MOS transistor Q2 is connected to one end of the first main coil of the transformer T1. The S pole of the MOS transistor Q2 is connected to the ground terminal. The other end of the first main coil of the transformer T1 is connected to the E pole of the triode Q1. The B pole of the triode Q1 is connected to one end of the second main coil of the transformer T1. The C pole of the triode Q1 is connected to the other end of the second main coil of the transformer T1. The secondary coil of the transformer T1 is connected to a connector P.

[0014] In the present invention according to the above solution, it further includes a charging circuit, and the charging circuit is connected to the control circuit.

[0015] In the present invention according to the above solution, the charging circuit includes a lithium battery U1. The sixth pin and the seventh pin of the lithium battery U1 are both connected to the control circuit.

[0016] The present invention according to the above solution further includes a charging status indication circuit. The charging status indication circuit includes a two-color indicator light LED2. The first pin and the third pin of the two-color indicator light LED2 are both connected to the control circuit, and the second pin of the two-color indicator light LED2 is connected to the ground terminal.

[0017] The present invention according to the above solution further includes a high-voltage status indication circuit. The high-voltage status indication circuit includes a resistor R17 and an indicator light LED1. One end of the resistor R17 is respectively connected to the control circuit and the high-voltage generation circuit. The other end of the resistor R17 is connected to one end of the indicator light LED1, and the other end of the indicator light LED1 is connected to the ground terminal.

[0018] The present invention according to the above solution further includes a mosquito attracting lamp circuit. The mosquito attracting lamp circuit includes an MOS transistor Q3. The G pole of the MOS transistor Q3 is connected to the control circuit. The D pole of the MOS transistor Q3 is connected to a connector P1, and the S pole of the MOS transistor Q3 is connected to the ground terminal.

[0019] The present invention according to the above solution further includes a lithium battery protection circuit. The lithium battery protection circuit includes a battery BT1 and a protection chip U3. The second pin of the protection chip U3 is connected to one end of the battery BT1, and the other end of the battery BT1 and the third pin of the protection chip U3 are both connected to the control circuit.

[0020] The beneficial effects of the present invention according to the above solution are as follows:

[0021] In the above electric mosquito swatter circuit with high safety, when the human body infrared induction switch is activated, the signal processing circuit will generate corresponding electrical signal changes and convert them into level signals suitable for the control circuit to recognize. The control circuit controls the opening and closing of the high-voltage generation circuit according to the input signals of the signal processing circuit and the mechanical button switch circuit. When the electric mosquito swatter circuit is in a state where a person is not close to the device, the human body infrared induction switch is not activated, and the circuit is in a connected state, and the power grid is charged, so that the electric mosquito swatter can always maintain a normal high-voltage output, thereby realizing the killing of mosquitoes and avoiding the problem of poor mosquito killing effect caused by reducing the voltage. When a person approaches the device, the activation of the human body infrared induction switch disconnects the circuit and the power grid is not charged, improving the safety of the electric mosquito swatter; the user can press the mechanical switch of the mechanical button switch circuit, and the circuit will be connected again, and the power grid is charged, allowing the user to promptly kill mosquitoes and ensuring a good mosquito killing effect in different scenarios.

[0022] In addition, when a person approaches the device, the human body infrared induction switch will be automatically activated, disconnecting the circuit and making the power grid not charged. There is no need for the user to pay extra attention or remember the anti-misoperation rules, and the circuit system will automatically complete the safety protection, reducing the cognitive burden of the user. Description of the Drawings

[0023] Figure 1 This is the circuit diagram of the signal processing circuit of the present invention;

[0024] Figure 2 This is the circuit diagram of the control circuit of the present invention;

[0025] Figure 3 This is the circuit diagram of the mechanical button switch circuit of the present invention;

[0026] Figure 4 This is the circuit diagram of the high-voltage generation circuit of the present invention;

[0027] Figure 5 This is the circuit diagram of the charging circuit of the present invention;

[0028] Figure 6 This is the circuit diagram of the charging state indication of the present invention;

[0029] Figure 7 This is the circuit diagram of the high-voltage state indication circuit of the present invention;

[0030] Figure 8 This is the circuit diagram of the mosquito attracting lamp circuit of the present invention;

[0031] Figure 9 This is the circuit diagram of the lithium battery protection circuit of the present invention. Detailed Description of the Invention

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As Figure 1 shown, the present invention provides an electric mosquito swatter circuit with high safety, including a signal processing circuit, a control circuit, a mechanical button switch circuit and a high-voltage generation circuit. The input end of the signal processing circuit is connected to the human body infrared induction switch, the output end of the signal processing circuit and the mechanical button switch circuit are both connected to the input end of the control circuit, and the output end of the control circuit is connected to the high-voltage generation circuit; the signal processing circuit is used to generate corresponding electrical signal changes when the human body infrared induction switch is activated, the signal processing circuit processes the signal changes generated by the human body infrared induction switch, and converts the processed signal into a level signal suitable for the control circuit to recognize; the control circuit is used to control the opening and closing of the high-voltage generation circuit according to the input signals of the signal processing circuit and the mechanical button switch circuit; the human body infrared induction switch can be designed as a pyroelectric infrared sensor. Of course, in actual design, the structure of the human body infrared induction switch can be designed according to actual needs.

[0034] In this embodiment, through the human body infrared induction switch and the signal processing circuit, the electric mosquito swatter can actively detect whether a human body is approaching. When the human body approaches and activates the human body infrared induction switch, the signal processing circuit converts the signal and transmits it to the control circuit. The control circuit can thereby control the high-voltage generation circuit to stop working, making the power grid non-energized, fundamentally avoiding the risk that the user accidentally touches the energized power grid and suffers an electric shock. Compared with the traditional electric mosquito swatter that relies on the user's own attention to prevent accidental contact in a passive manner, the use safety is improved.

[0035] In this embodiment, when the electric mosquito swatter circuit is in a state where no one is approaching the device, the human body infrared induction switch is not activated, the circuit is in a connected state, and the power grid is energized, so that the electric mosquito swatter can always maintain a normal high-voltage output, thereby achieving the killing of mosquitoes and avoiding the problem of poor mosquito-killing effect caused by voltage reduction. When a person approaches the device, the activation of the human body infrared induction switch disconnects the circuit and the power grid is non-energized, improving the safety of the electric mosquito swatter; the user can press the mechanical switch of the circuit, and the circuit will be connected again, and the power grid is energized, enabling the user to promptly kill mosquitoes and ensuring a good mosquito-killing effect in different scenarios. In addition, when a person approaches the device, the human body infrared induction switch will be automatically activated, disconnecting the circuit and making the power grid non-energized. Without the user's extra attention or memory of the anti-misoperation rules, the circuit system will automatically complete the safety protection, reducing the user's cognitive burden.

[0036] As Figure 1 shown, in this embodiment, the signal processing circuit includes a dual operational amplifier U5 and a dual operational amplifier U6. The first pin of the dual operational amplifier U5 is respectively connected to one end of a resistor R30, one end of a resistor R32, one end of a capacitor C14, and the fifth pin of the dual operational amplifier U5. The other end of the resistor R30 is connected to the second pin of the dual operational amplifier U5. The third pin of the dual operational amplifier U5 is respectively connected to one end of a resistor R29, one end of a capacitor C13, and the human body infrared induction switch. The other ends of the resistor R32, the capacitor C14, the resistor R29, the capacitor C13, and the fourth pin of the dual operational amplifier U5 are all grounded. The sixth pin of the dual operational amplifier U5 is connected to one end of a resistor R31. The other end of the resistor R31 and the seventh pin of the dual operational amplifier U5 are both connected to the third pin of the dual operational amplifier U6. The first pin of the dual operational amplifier U6 is connected to one end of a resistor R35. The other end of the resistor R35 is connected to the fifth pin of the dual operational amplifier U5. The second pin of the dual operational amplifier U6 is respectively connected to a resistor R33 and a resistor R34. The fourth pin of the dual operational amplifier U6 is grounded. The sixth pin of the dual operational amplifier U6 is connected to one end of a resistor R36. The other end of the resistor R36 and the seventh pin of the dual operational amplifier U6 are both connected to the input end of the control circuit.

[0037] The signal processing circuit is mainly used to amplify, filter, and condition the weak signals generated by the human body infrared induction switch. Through the processing of the dual operational amplifier U5 and the dual operational amplifier U6, the amplitude and stability of the signal are improved, noise interference is removed, and the signal reaches the standard suitable for the control circuit to process, ensuring that the control circuit can accurately receive the signals from the human body infrared induction switch and make corresponding control decisions according to the signals. For example, it controls whether the high-voltage generation circuit of the electric mosquito swatter works, thereby realizing the safety protection function of the electric mosquito swatter when a person approaches and the mosquito killing function during normal operation.

[0038] As Figure 2 shown, in this embodiment, the control circuit includes a control chip U2. The first pin of the control chip U2 is respectively connected to one end of a resistor R13, one end of a resistor R12, and one end of a capacitor C6. The other end of the resistor R12 is connected to one end of a resistor R11, one end of a capacitor C7, and the 15th pin of the control chip U2. The other end of the capacitor C6 is connected to the 16th pin of the control chip U2, and the other end of the capacitor C6, the 16th pin of the control chip U2, and the other end of the capacitor C7 are all connected to the ground terminal. The 2nd pin, the 3rd pin, and the 4th pin of the control chip U2 are all connected to the mechanical button switch circuit. The 14th pin of the control chip U2 is respectively connected to one end of a resistor R28 and one end of a capacitor C9. The other end of the resistor R28 is connected to the 7th pin of the dual operational amplifier U6 of the signal processing circuit. The 12th pin of the control chip U2 is connected to the high-voltage generation circuit.

[0039] In the control circuit, the battery voltage VBAT is connected to the first pin of the control chip U2 through the resistor R13 to supply power to the control chip U2. The resistor R13 plays a certain current limiting role to prevent excessive current from impacting the chip. The capacitor C6 and the capacitor C7 form a filtering circuit. The capacitor C6 is connected between the first pin of the control chip U2 and the ground terminal, which can filter out high-frequency interference signals in the power supply. The capacitor C7 cooperates with the resistor R12 to further stabilize the signal of the 15th pin of the control chip U2, ensuring the stable operation of the control chip U2.

[0040] In the control circuit, the 2nd pin, the 3rd pin, and the 4th pin of the control chip U2 are connected to the mechanical button switch circuit. When the mechanical button S2 of the mechanical button switch circuit acts, it will change the level states of these pins. The control chip U2 obtains the operation information of the mechanical button S2, such as being pressed or released, by detecting the changes in the pin levels.

[0041] In the control circuit, the 12th pin of the control chip U2 is connected to the high-voltage generation circuit. The control chip U2 outputs a control signal through the 12th pin of the control chip U2 according to the signals received from the mechanical button switch circuit and the signal processing circuit, thereby controlling the turning on or off of the high-voltage output of the high-voltage generation circuit. The control circuit is used to integrate the operation signals from the mechanical button switch circuit and the human body induction signals from the signal processing circuit. Through the analysis, processing and logical judgment of these signals, it precisely controls the operation of the high-voltage generation circuit and realizes the normal use of the electric mosquito swatter on the premise of safety. For example, when a human body approaches, combined with the operation of the mechanical button, it controls whether the high-voltage generation circuit outputs high voltage, which not only ensures the safety of the user but also meets the mosquito-killing requirements.

[0042] As Figure 3 shown, in this embodiment, the mechanical button switch circuit includes a mechanical button S2 and a three-way switch S1. One end of the mechanical button S2 is connected to one end of the three-way switch S1, the other end of the mechanical button S2 is connected to the 4th pin of the control chip U2 of the control circuit, and the other ends of the three-way switch S1 are respectively connected to the 2nd pin and the 3rd pin of the control chip U2 of the control circuit.

[0043] In the mechanical button switch circuit, the mechanical button S2 is a normally open switch. When it is in the unpressed state, the circuit is in an open state and no current passes through. When S2 is pressed, the switch closes, and the current starts from the connection point, flows through S2 to the 4th pin of the control chip U2 of the control circuit, thereby inputting a change in the level signal to the control chip U2. In addition, the three-way switch S1 can switch different connection states, and different connection states will generate different combinations of level signals. By connecting to the 2nd pin and the 3rd pin of the control chip U2, the switch state information is transmitted to the control chip U2.

[0044] The main function of the mechanical button switch circuit is to provide a manual input signal for the control circuit. The mechanical button S2 can be used to trigger specific operations, such as starting or stopping the high-voltage output function of the electric mosquito swatter. The three-way switch S1 provides the function of selecting different working modes or states, enabling the control chip U2 to execute corresponding control logics according to the different signal combinations received, and then realizing the control and switching of different functions of the electric mosquito swatter to meet the diverse usage requirements of users.

[0045] As Figure 4As shown, in this embodiment, the high-voltage generation circuit includes MOS transistor Q2, bipolar transistor Q1, and transformer T1. The G pole of MOS transistor Q2 is connected to one end of resistor R8. The other end of resistor R8 is respectively connected to one end of resistor R9 and the 12th pin of control chip U2 of the control circuit. The S pole of MOS transistor Q2 is respectively connected to the other end of resistor R9 and the ground terminal. The G pole of MOS transistor Q2 is connected to one end of the first main coil of transformer T1. The other end of the first main coil of transformer T1 is connected to the E pole of bipolar transistor Q1. The B pole of bipolar transistor Q1 is connected to one end of the second main coil of transformer T1 through resistor R1. The C pole of bipolar transistor Q1 is respectively connected to the other end of the second main coil of transformer T1 and the battery voltage VBAT. One end of the secondary coil of transformer T1 is respectively connected to one end of capacitor C1 and one end of diode D1. The other end of the secondary coil of transformer T1 is respectively connected to one end of capacitor C2 and one end of diode D3. The other end of capacitor C1 is respectively connected to the other end of diode D3 and one end of diode D2. The other end of diode D1 is respectively connected to the other end of capacitor C2, one end of capacitor C3, one end of connector P, and one end of resistor R25. The other end of diode D2 is respectively connected to the other end of capacitor C3, the other end of connector P, and one end of resistor R27. The other end of resistor R27 is connected to one end of resistor R26. The other end of resistor R26 is connected to the other end of resistor R25.

[0046] In the high-voltage generation circuit, the control signal (HV EN) output by the 12th pin of control chip U2 of the control circuit, after passing through the voltage-dividing circuit composed of resistor R8 and resistor R9, is connected to the G pole of MOS transistor Q2. When HV EN is at a high level, under the action of resistor R8 and resistor R9, the G pole of MOS transistor Q2 obtains an appropriate voltage, causing MOS transistor Q2 to conduct. When HV EN is at a low level, MOS transistor Q2 is cut off. After MOS transistor Q2 conducts, it provides a current path for the base of bipolar transistor Q1. Bipolar transistor Q1 operates in a switching state, forming a loop with the second main coil of transformer T1 through resistor R1, so that the primary winding (the first main coil and the second main coil) of transformer T1 generates a changing current. According to the principle of electromagnetic induction, this changing current induces a high-voltage alternating signal in the secondary winding (the secondary coil) of transformer T1. The high-voltage alternating signal induced in the secondary winding of transformer T1 is respectively connected to diodes D1, D2, and D3. Diodes D1, D2, and D3 constitute a rectification circuit, using the unidirectional conductivity of diodes to convert the alternating signal into a direct-current signal. Capacitors C1, C2, and C3 form a filtering circuit to filter the rectified direct-current signal, remove the ripple, and make the output high-voltage direct current smoother and more stable. The high-voltage direct current after rectification and filtering is output through connector P to supply power to the power grid.

[0047] The main function of the high-voltage generation circuit is to convert the low-voltage direct current (VBAT) provided by the battery into a high-voltage direct current output, providing sufficient electrical energy for the electric mosquito swatter's grid to kill mosquitoes. The on and off of the high-voltage generation circuit are controlled by the signal (HV EN) output by the control circuit to achieve safe high-voltage output control.

[0048] As Figure 5 shown, in this embodiment, the electric mosquito swatter circuit further includes a charging circuit, and the charging circuit is connected to the control circuit. Specifically, the charging circuit includes a lithium battery U1. The 6th pin and the 7th pin of the lithium battery U1 are both connected to the control circuit. The 2nd pin of the lithium battery U1 is connected to one end of the resistor R2. The 5th pin of the lithium battery U1 is respectively connected to the battery voltage VBAT and one end of the capacitor R5. The 8th pin, the 4th pin of the lithium battery U1, one end of the resistor R6, one end of the capacitor C4, one end of the connector P2, one end of the resistor R5, and one end of the resistor R3 are all connected to the USB interface J1. The other end of the capacitor R5, the 9th pin of the lithium battery U1, the other end of the capacitor C4, the other end of the resistor R6, the other end of the resistor R2, the 1st pin of the lithium battery U1, the 3rd pin of the lithium battery U1, the other end of the connector P2, the other end of the resistor R5, and the other end of the resistor R3 are all connected to the ground terminal.

[0049] In the charging circuit, an external power supply is connected to the circuit through the USB interface J1. The 7th pin of the lithium battery U1 is the charging status output pin. When the battery is charging, this pin outputs a low level; after charging is completed, it outputs a high level, and the level signal is connected to the control circuit to indicate the charging status. The 6th pin of the lithium battery U1 outputs a low level when the battery is fully charged, and is also connected to the control circuit to send a signal that the battery is fully charged. The charging circuit provides a safe and stable charging function for the lithium battery, automatically controlling the charging current and voltage to ensure that the battery can be charged quickly and safely. At the same time, the charging status is fed back to the control circuit to facilitate the user or the system to understand the charging situation of the battery.

[0050] As Figure 6 shown, in the charging circuit, the electric mosquito swatter circuit further includes a charging status indication circuit. The charging status indication circuit includes a two-color indicator LED2. The 1st pin of the two-color indicator LED2 is connected to the 11th pin of the control chip U2 of the control circuit through the resistor R17. The 3rd pin of the two-color indicator LED2 is connected to the 10th pin of the control chip U2 of the control circuit through the resistor R22. The 2nd pin of the two-color indicator LED2 is connected to the ground terminal.

[0051] In the charging status indication circuit, when the battery is in the charging state, the 10th pin of the control chip U2 of the control circuit outputs a high-level signal. The current starts from the 10th pin of the control chip U2, and after being limited by the resistor R22, it flows into the 3rd pin of the dual-color indicator LED2, driving the light-emitting unit responsible for indicating the charging status in the dual-color indicator LED2 to emit light. When the battery charging is completed, the 11th pin of the control chip U2 outputs a high-level signal. The current is limited by the resistor R20 and then flows into the dual-color indicator LED2 from the 1st pin of the dual-color indicator LED2, causing the light-emitting unit used to indicate the full state to emit light. The charging status indication circuit visually shows the charging status of the battery to the user through the different light-emitting states of the dual-color indicator LED2. The user can quickly understand whether the battery is in the charging process or fully charged by observing the color of the dual-color indicator LED2, providing a convenient way for the user to check the charging status.

[0052] As Figure 7 shown, in this embodiment, the electric mosquito swatter circuit further includes a high-voltage status indication circuit. The high-voltage status indication circuit includes a resistor R17 and an indicator lamp LED1. One end of the resistor R17 is connected to the 12th pin of the control chip U2 of the control circuit and the MOS tube Q2 of the high-voltage generation circuit respectively. The other end of the resistor R17 is connected to one end of the indicator lamp LED1, and the other end of the indicator lamp LED1 is connected to the ground terminal. The signal (HV EN) output by the 12th pin of the control chip U2 of the control circuit is also connected to the MOS tube Q2 of the high-voltage generation circuit. This signal is used to control the working state of the high-voltage generation circuit. This signal is transmitted to the indicator lamp LED1 through the resistor R17. The resistor R17 plays a role in current limiting, preventing excessive current from passing through the LED1 and protecting the LED1 from being damaged. When the HV EN signal is at a high level, the high-voltage generation circuit is in the working state, and there is current passing through the resistor R17, flowing into the positive pole of the indicator lamp LED1 and then grounding from the negative pole, forming a loop, and the indicator lamp LED1 emits light, indicating that the high voltage has been generated. When the HV EN signal is at a low level, there is not enough voltage to drive the current through the indicator lamp LED1, and the indicator lamp LED1 goes out, indicating that the high-voltage generation circuit is in the off state.

[0053] The main function of the high-voltage status indication circuit is to visually show the working state of the high-voltage generation circuit to the user through the lighting and extinguishing states of the indicator lamp LED1. In the electric mosquito swatter, the user can quickly judge whether the device is in the high-voltage charged state by observing whether the indicator lamp LED1 emits light, thereby improving the safety and convenience of use and avoiding dangers such as electric shock caused by misoperation.

[0054] As Figure 8As shown, in this embodiment, the electric mosquito racket circuit further includes a mosquito attracting lamp circuit. The mosquito attracting lamp circuit includes MOS transistor Q3. The G pole of MOS transistor Q3 is connected to one end of resistor R14. The other end of resistor R14 is respectively connected to the 13th pin of control chip U2 of the control circuit and one end of resistor R15. The S pole of MOS transistor Q3 and the other end of resistor R15 are both connected to the ground terminal. The D pole of MOS transistor Q3 is respectively connected to one end of connector P1, one end of resistor R1A, and one end of capacitor C1A. The other end of resistor R1A and the other end of capacitor C1A are both connected to the other end of connector P1.

[0055] In the mosquito attracting lamp circuit, the 13th pin of control chip U2 of the control circuit outputs a control signal. This signal is transmitted to the G pole of MOS transistor Q3 through resistor R14. When there is no input signal, the G pole of MOS transistor Q3 is pulled to a low level to ensure that the MOS transistor is in the cut-off state. When the 13th pin of control chip U2 outputs a high-level LAMP signal, current flows through resistor R14 into the G pole of MOS transistor Q3, causing the voltage of the G pole to rise. When the voltage of the G pole reaches the turn-on voltage of MOS transistor Q3, the MOS transistor conducts. At this time, a conductive path is formed between the D pole and the S pole of MOS transistor Q3. The battery voltage VBAT passes through the circuit composed of resistor R1A and capacitor C1A, and then through the conducting MOS transistor Q3, to supply power to the mosquito attracting lamp connected to connector P1, causing the mosquito attracting lamp to emit light. Resistor R1A plays a role in limiting current to prevent excessive current from damaging the mosquito attracting lamp or other components; capacitor C1A plays a role in filtering and stabilizing voltage to ensure that the mosquito attracting lamp can work stably. By precisely controlling the turning on and off of the mosquito attracting lamp through the control circuit, when it is necessary to trap mosquitoes, the mosquito attracting lamp is lit in time to attract mosquitoes to approach by using the phototaxis of mosquitoes, creating conditions for killing mosquitoes subsequently.

[0056] As Figure 9As shown, in the present embodiment, the electric mosquito swatter circuit also includes a lithium battery protection circuit, which includes a battery BT1 and a protection chip U3. The second pin of the protection chip U3 is respectively connected to one end of the battery BT1 and one end of the capacitor C8, and the third pin of the protection chip U3 is connected to one end of the resistor R24. The other end of the resistor R24 and the other end of the battery BT1 are both connected to the control circuit, and the fourth pin of the protection chip U3 and the fifth pin of the protection chip U3 are both grounded. The battery BT1 serves as a power supply, and the capacitor C8 plays a filtering role, which can filter out the high-frequency noise in the battery output voltage, so that the voltage input to the protection chip is more stable. The resistor R24 plays a current limiting role, preventing excessive current from flowing into the chip and protecting the chip from being damaged. The lithium battery protection circuit monitors the status of the lithium battery U1 in real time through the protection chip U3. When the lithium battery U1 is overcharged, it prevents the lithium battery U1 from being damaged due to excessive voltage or even causing a safety accident; when the lithium battery U1 is over-discharged, it prevents the lithium battery U1 from being over-discharged, resulting in performance degradation and shortened life; when an overcurrent occurs, it cuts off the circuit in time to prevent large current from damaging the lithium battery U1 and other circuit components, thereby effectively extending the service life of the lithium battery and improving the safety and stability of the electric mosquito swatter during use.

[0057] When the electric mosquito swatter is in use, if a person is not close to the device, for example, the distance is greater than 1m, the human infrared sensor switch is not activated, and there is no special signal change in the signal processing circuit. The control circuit maintains the conduction of the high-voltage generating circuit, so that the power grid is energized, and the electric mosquito swatter is in a normal working state. When a person approaches the device, for example, the distance is less than 1m, the human infrared sensor switch is activated, and a signal is input to the signal processing circuit. The signal processing circuit processes it and transmits it to the control circuit. After receiving the signal, the control circuit cuts off the high-voltage generating circuit, and the power grid is not energized, achieving safety protection. If a person approaches and presses the mechanical push switch, the mechanical button switch is connected, and the control circuit re-connects the high-voltage generating circuit after receiving the connection signal. The power grid is energized again, and the electric mosquito swatter can continue to work.

[0058] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0059] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An electric mosquito swatter circuit with high safety, characterized in that, It includes a signal processing circuit, a control circuit, a mechanical button switch circuit and a high-voltage generation circuit. The input end of the signal processing circuit is connected to a human body infrared induction switch. The output end of the signal processing circuit and the mechanical button switch circuit are both connected to the input end of the control circuit. The output end of the control circuit is connected to the high-voltage generation circuit; The signal processing circuit is used to generate corresponding electrical signal changes when the human body infrared induction switch is activated. The signal processing circuit processes the signal changes generated by the human body infrared induction switch and converts the processed signal into a level signal suitable for the control circuit to recognize; The control circuit is used to control the opening and closing of the high-voltage generation circuit according to the input signals of the signal processing circuit and the mechanical button switch circuit.

2. The high-security electric mosquito swatter circuit according to claim 1, characterized in that, The signal processing circuit includes a dual operational amplifier U5 and a dual operational amplifier U6. The 3rd pin of the dual operational amplifier U5 is connected to the human body infrared induction switch. The 7th pin of the dual operational amplifier U5 is connected to the 3rd pin of the dual operational amplifier U6. The 7th pin of the dual operational amplifier U6 is connected to the input end of the control circuit.

3. The high-security electric mosquito swatter circuit according to claim 1, wherein The control circuit includes a control chip U2. The 14th pin of the control chip U2 is connected to the signal processing circuit. The 12th pin of the control chip U2 is connected to the high-voltage generation circuit. The 2nd pin, the 3rd pin and the 3rd pin of the control chip U2 are all connected to the mechanical button switch circuit.

4. The high-security electric mosquito swatter circuit according to claim 1, wherein The mechanical button switch circuit includes a mechanical button S2 and a three-way switch S1. One end of the mechanical button S2 is connected to one end of the three-way switch S1. The other end of the mechanical button S2 and the other end of the three-way switch S1 are both connected to the control circuit.

5. The electric mosquito swatter circuit with high safety according to claim 1, wherein The high-voltage generation circuit includes a MOS transistor Q2, a triode Q1 and a transformer T1. The G pole of the MOS transistor Q2 is connected to the control circuit. The G pole of the MOS transistor Q2 is connected to one end of the first main coil of the transformer T1. The S pole of the MOS transistor Q2 is grounded. The other end of the first main coil of the transformer T1 is connected to the E pole of the triode Q1. The B pole of the triode Q1 is connected to one end of the second main coil of the transformer T1. The C pole of the triode Q1 is connected to the other end of the second main coil of the transformer T1. The secondary coil of the transformer T1 is connected to a connector.

6. The electric mosquito swatter circuit with high safety according to claim 1, characterized in that, It further includes a charging circuit, and the charging circuit is connected to the control circuit.

7. The high-security electric mosquito swatter circuit according to claim 6, characterized in that, The charging circuit includes a lithium battery U1. The 6th pin and the 7th pin of the lithium battery U1 are both connected to the control circuit.

8. The high-security electric mosquito swatter circuit according to claim 1, characterized in that, It further includes a charging state indication circuit. The charging state indication circuit includes a two-color indicator LED2. The 1st pin and the 3rd pin of the two-color indicator LED2 are both connected to the control circuit. The 2nd pin of the two-color indicator LED2 is grounded.

9. The electric mosquito swatter circuit with high safety according to claim 1, characterized in that, It further includes a high-voltage status indication circuit. The high-voltage status indication circuit includes a resistor R17 and an indicator lamp LED1. One end of the resistor R17 is connected to the control circuit and the high-voltage generation circuit respectively. The other end of the resistor R17 is connected to one end of the indicator lamp LED1, and the other end of the indicator lamp LED1 is connected to the ground terminal.

10. The high-security electric mosquito swatter circuit according to claim 1, wherein, It further includes a mosquito attracting lamp circuit. The mosquito attracting lamp circuit includes a MOS transistor Q3. The G pole of the MOS transistor Q3 is connected to the control circuit. The D pole of the MOS transistor Q3 is connected to a connector P1, and the S pole of the MOS transistor Q3 is connected to the ground terminal.

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