TWI829342B - Safe and static electric mosquito swatter - Google Patents

Abstract

The invention includes a battery placement slot and a step-up transformer arranged in a casing; the step-up transformer has a low-voltage side and a high-voltage side; a push switch is arranged in series with the battery placement slot and an oscillation circuit contained in the low-voltage side. between the circuits; a mosquito net extends from the outside of the housing to the inside of the housing and is electrically connected to the high voltage side; an external power port is provided on the housing and electrically connected to the oscillation circuit; when the battery is placed in the slot When a battery unit is connected, and the push switch is pressed by an external force and turns on, the battery unit outputs a battery power to the step-up transformer; when the external power port is connected to an external power supply, the external power supply outputs an external power to the The step-up transformer does not charge the battery unit to avoid overheating of the battery unit during charging.

Description

Safe and stationary electric mosquito swatter

An electric mosquito swatter, especially a safe and static electric mosquito swatter.

The electric mosquito swatter was invented by East Asian countries. After decades of evolution, it has become widely known in East Asia as an effective tool for dealing with mosquitoes.

Recently, due to the rise of rechargeable electric mosquito swatters, electric mosquito swatters have evolved into static electric mosquito swatters. The static electric mosquito swatters will form a static mosquito-catching mode when charging, that is, they will produce light and At the same time, the power grid is energized, so that the charging stationary electric mosquito swatter forms a mosquito-catching form like an electric mosquito lamp, using the light waves corresponding to the mosquito's positive phototaxis (phototropism) to attract mosquitoes to fly into the power grid.

However, this type of static electric mosquito swatter charges the battery, lights up the trap light, and maintains the static electricity of the power grid at the same time, so it will continuously deliver current to the battery when charging at night. When the quality of the recharged battery is poor, it is easy for the recharged battery to overheat in this situation, and there may even be a risk of fire due to overheating of the recharged battery of the electric mosquito swatter at night.

In view of the above problems, the present invention provides a safe and stationary electric mosquito swatter, which can avoid continuous charging of the battery when the mosquito swatter is left stationary at night to trap mosquitoes, thereby avoiding the danger of overheating caused by the continuous charging of the battery.

This safe, stationary electric mosquito swatter includes: a shell; A battery placement slot is provided in the casing; A step-up transformer is provided in the housing and has a low-voltage side and a high-voltage side; wherein the low-voltage side includes an oscillation circuit; A push switch is provided on the casing and is connected in series between the battery placement slot and the oscillation circuit; A mosquito net is connected to the housing, extends from the outside of the housing to the inside of the housing, and is electrically connected to the high-voltage side of the step-up transformer; An external power port is provided on the housing and is electrically connected to the oscillation circuit on the low-voltage side; A trap light is installed in the housing and electrically connected to the external power port; Wherein, when the push switch is pressed by an external force and is activated, the push switch is turned on; when the push switch is not pressed and is not activated, the push switch is not turned on; Wherein, when a battery unit is installed in the battery placement slot and the push switch is activated, the battery unit in the battery placement slot outputs a battery power to the oscillation circuit on the low voltage side, and the oscillation circuit switches the battery The electric power is converted into a low-voltage alternating current, and a high-voltage electric power is generated from the high-voltage side to the mosquito net; Wherein, when the external power port is connected to an external power supply, the external power supply outputs an external power to the oscillation circuit and the trap light on the low voltage side through the external power port, causing the trap light to light up, and the oscillation circuit turns the The external power is converted into the low-voltage alternating current, and the high-voltage power is generated from the high-voltage side to the mosquito net.

When the safe and stationary electric mosquito swatter of the present invention is actually used, a user will only hold the push switch of the safe and stationary electric mosquito swatter when he wants to actively catch mosquitoes to generate the external force to activate the button. The switch conducts the circuit between the battery placement slot and the step-up transformer. When the user connects the external power port to the external power supply, that is, when the user prepares to leave the safe and stationary electric mosquito swatter to light up the trap lamp to passively capture mosquitoes, the user should not actually Keep pressing the switch. Therefore, when the step-up transformer receives the external power from the external power port, it will not continue to receive the battery power from the battery placement slot at the same time, because the push switch will not normally be pressed to turn on. In this way, the present invention can prevent the battery unit in the battery placement slot from being continuously charged when the electric mosquito swatter is left standing, thereby avoiding the risk of the battery unit being overheated and causing a fire due to continuous charging.

Please refer to Figures 1 to 3. The present invention is a safe and static electric mosquito swatter. The safe and static electric mosquito swatter includes a shell 10, a battery placement slot 20, a step-up transformer 30, a push switch 40, a mosquito net 50, an external power port 60, a trap light 70 and a grounding GND .

The battery placement slot 20 , the step-up transformer 30 and the trapping light 70 are respectively disposed in the housing 10 . The step-up transformer 30 has a low-voltage side 31 and a high-voltage side 32, and the low-voltage side 31 of the step-up transformer 30 includes an oscillation circuit. The housing 10 includes a transparent window 11 , and the trap light 70 is disposed in the housing 10 corresponding to the transparent window 11 . The push switch 40 and the external power port 60 are respectively disposed on the housing 10 . Moreover, the push switch 40 is connected in series between the battery placement slot 20 and the oscillation circuit of the low-voltage side 31 of the step-up transformer 30 , and the external power port 60 is electrically connected to the low-voltage side 31 of the step-up transformer 30 . The trap light 70 is electrically connected to the external power port 60 , and the trap light 70 is disposed between the ground GND and the external power port 60 . The mosquito net 50 is connected to the housing 10 and extends from the outside of the housing 10 to the inside of the housing 10 . The portion of the mosquito net 50 inside the housing 10 is electrically connected to the high voltage side 32 of the step-up transformer 30 .

From the perspective of a user using the present invention, please refer to the following usage process of the present invention.

When the safe and stationary electric mosquito swatter of the present invention is used, a battery unit 21 matching the present invention is installed in the battery placement slot 20 . The user who uses the present invention can choose to use the present invention to actively catch mosquitoes or passively catch mosquitoes.

When the user chooses to actively catch mosquitoes, the user needs to hold the push switch 40 of the safe and stationary electric mosquito swatter to generate an external force to press the push switch 40, so that the mosquito net 50 of the present invention can be used Power up. The user can hold the housing 10 and swing out the safe and stationary electric mosquito swatter, so that the electrified mosquito net 50 can swing against mosquitoes to actively catch mosquitoes.

When the user chooses to passively catch mosquitoes, the user connects the external power port 60 to an external power source of the present invention and leaves the safe and stationary electric mosquito swatter. When the user connects the external power port 60 to the external power supply, the trap light 70 will light up and the mosquito net 50 will be powered on. The user does not need to continuously press the push switch 40 to passively capture mosquitoes using the trap lamp 70 and the powered mosquito net 50 .

For example, when the push switch 40 is pressed by the external force and is activated, the push switch 40 is in a conductive state; conversely, when the push switch 40 is not pressed and is not activated, the push switch 40 is in a non-conducting state. . Furthermore, the push switch 40 has a spring inside, and the spring can keep the push switch 40 in a non-conducting circuit state when it is not pressed by the external force and is not activated. Therefore, when the user stops pressing and stops activating the push switch 40, the push switch 40 stops conducting.

Generally speaking, the present invention is used with a battery unit 21. The battery unit 21 is disposed in the battery placement slot 20. When the push switch 40 is activated by being pressed by the external force, the battery placement slot 20 and the lifting switch 40 are activated. The circuit between the low-voltage side 31 of the voltage transformer 30 can be connected to form a loop, so that the battery unit 21 in the battery placement slot 20 outputs a battery power to the oscillation through the battery placement slot 20 and the turned-on push switch 40. circuit, the oscillation circuit converts the battery power into a low-voltage alternating current.

In detail, the battery placement slot 20 includes a positive terminal 20P and a negative terminal 20N. The positive terminal 20P is electrically connected to the positive terminal output of the battery unit 21, and the negative terminal 20N is electrically connected to the negative terminal output of the battery unit 21. The positive terminal 20P of the battery placement slot 20 is electrically connected to the push switch 40 , and the negative terminal 20N of the battery placement slot 20 is electrically connected to the ground GND and the low voltage side 31 of the step-up transformer 30 . Based on the potential difference between the positive and negative electrodes of the battery unit 21, when the push switch 40 is turned on, the current of the battery power will flow from the positive terminal 20P through the push switch 40 and the low voltage side 31 of the step-up transformer 30 respectively. 20N flows to the negative terminal.

When the push switch 40 is not pressed by the external force and is not activated, the circuit between the battery placement slot 20 and the low voltage side 31 of the step-up transformer 30 is not conducted, and the battery power cannot pass through the battery placement. The output of the slot 20 and the push switch 40 is to the low voltage side 31 of the step-up transformer 30 .

When the external power supply port 60 is connected to the external power supply, the external power supply outputs an external power to the present invention through the external power supply port 60 . The external power will be output from the external power port 60 to the trap light 70 and the oscillation circuit respectively, and the oscillation circuit will convert the external power into the low-voltage alternating current. In other words, based on the potential difference between the external power port 60 and the ground GND, the current of the external power will flow to the trap lamp 70 and the low voltage side 31 of the step-up transformer 30 respectively and then flow to the ground GND. The trap light 70 receives the external power and lights up to generate a trap light. The trapping light will emit from the housing 10 to the outside of the housing 10 through the transparent window 11 and shine between the mosquito nets 50 to confuse the mosquitoes to fly to the mosquito nets 50 . The so-called mosquito net 50 exposed outside the casing 10 is a grid used to energize the mosquitoes in the safe and stationary electric mosquito swatter of the present invention.

The low-voltage side 31 also has a low-voltage coil 31A and an inductor 31B, and the oscillation circuit includes a transistor Q and a first resistor R1. The transistor Q is an NPN type bipolar junction transistor (BJT), and its collector (Collector; C) is electrically connected to the external power port 60 and the push switch 40, and a base ( Base; B) is electrically connected to the first resistor R1 and is electrically connected to the first coil 31A through the first resistor R1. An emitter (Emitter; E) is electrically connected to the inductor 31B and is electrically connected to the ground GND and through the inductor 31B. The negative terminal is 20N. A first end of the low-voltage coil 31A is electrically connected to the external power port 60 and the push switch 40 , and a second end of the low-voltage coil 31A is electrically connected to the first resistor R1 . The inductor 31B is electrically connected between the emitter of the transistor Q and the ground GND.

The function of the step-up transformer 30 is to step up the low voltage on the low-voltage side 31 and output the high voltage on the high-voltage side 32 . The battery power or the external power received by the step-up transformer 30 is a direct current. When the low-voltage side 31 of the step-up transformer 30 receives the external power or the positive power output by the battery power, the transistor Q, the low-voltage coil 31A and the pole 31B form a high-frequency oscillator to be energized. In this embodiment, the transistor Q is a D882 model BJT transistor.

When the low-voltage side 31 of the step-up transformer 30 receives the external power or the positive power output by the battery power, the step-up transformer 30 generates a high-voltage power at the high-voltage side 32 and outputs the high-voltage power. to the mosquito net 50. When the step-up transformer 30 outputs a high voltage to the mosquito net 50 , there is a high potential difference between the two open ends of the mosquito net 50 . When a mosquito flies to the middle of the open circuit, the two sections with high potential difference will release electricity through the mosquito, thereby shocking the mosquito.

When the step-up transformer 30 receives the external power, it does not continue to receive the battery power from the battery placement slot 20 at the same time. This is because the push switch 40 normally does not activate when the user passively catches mosquitoes. Conducted when pressed. In this way, the present invention can avoid the continuous charging of the battery unit 21 in the battery placement slot 20 during passive mosquito catching, thereby avoiding the risk of overheating and causing fire due to continuous charging of the battery unit 21 .

In this embodiment, the safe and stationary electric mosquito swatter further includes a power switch 80, a work light 90, a first diode D1 and a second diode D2. Moreover, the safe and stationary electric mosquito swatter has a base 100 for resting the safe and stationary electric mosquito swatter. The base 100 has a groove 101, and the groove 101 of the base 100 can accommodate the housing 10 of the safe and restable electric mosquito swatter, so as to stand and erect the housing 10 of the safe and restable electric mosquito swatter. , the mosquito net 50 connected to the housing 10 and exposed outside the housing 10 is left standing to catch mosquitoes.

The power switch 80 , the first diode D1 and the push switch 40 are connected in series between the battery placement slot 20 and the low voltage side 31 of the step-up transformer 30 . The positive terminal 20P is electrically connected in series with the power switch 80 , the first diode D1 and the push switch 40 . The second diode D2 is electrically connected between the external power port 60 and the low-voltage side 31 of the step-up transformer 30 . Further, the first diode D1 and the second diode D2 are connected in parallel to the low voltage side 31 of the step-up transformer 30, and the first diode D1 and the second diode D2 are respectively directed to the step-up transformer 30. This low voltage side 31 of the transformer 30 . Moreover, the work light 90 and the low-voltage side 31 of the step-up transformer 30 are connected in parallel between the second diode D2 and the ground GND electrically connected to the negative terminal 20N.

In this embodiment, the external power port 60 is a Micro-Universal Serial Bus (Micro-USB) port, receiving a voltage of 5 volts (Volt; V), but it is not limited to this. . The battery unit 21 used in the present invention is two 1.5V voltage batteries connected in series, so the battery placement slot 20 can receive a total voltage of 3V from the battery unit 21 and output 3V of battery power. The battery placement slot 20 and the battery unit 21 adapted to the present invention are not limited thereto. In other embodiments, different types of batteries and different numbers of batteries can also be used. The 5V voltage of the external power will approach the 3V voltage of the battery power after being consumed by the second diode D2. Therefore, when the step-up transformer 30 converts the battery power or the external power into the high-voltage power , the voltage of the high-voltage power is generally stable, and there will be no voltage mismatch.

In this embodiment, the step-up transformer 30 can step up the 3V voltage to a high voltage of 600V, that is, the step-up transformer 30 has a 200-fold boosting function.

The mosquito net 50 has a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5.

The high-voltage side 32 of the step-up transformer 30 has a first terminal 32A and an opposite second terminal 32B. The first terminal 32A of the high-voltage side 32 is electrically connected to the first capacitor C1 and the second capacitor C2, and the first capacitor C1 and the second capacitor C2 are connected in parallel to the first terminal 32A of the high-voltage side 32 . The first capacitor C1 is further electrically connected to the third diode D3 and the fourth diode D4, and the second capacitor C2 is further electrically connected to the fifth diode D5 and the sixth diode D6. The second end 32B of the high voltage side 32 of the step-up transformer 30 is electrically connected to the third diode D3, the third capacitor C3, the fourth capacitor C4 and the sixth diode D6.

Specifically, the third diode D3, the third capacitor C3 and the fourth diode D4 are connected in series to form a loop, wherein the fourth diode D4 points to the third diode D3 and the first The capacitor C1, the third diode D3 points to the third capacitor C3 and the second end 32B of the high voltage side 32 of the step-up transformer 30, and the third diode D3 points to the third capacitor C3 through the third capacitor C3. The fourth diode D4. The fifth diode D5, the fourth capacitor C4 and the sixth diode D6 are connected in series to form a loop, in which the sixth diode D6 points to the fifth diode D5 and the second capacitor C2. The fifth diode D5 points to the sixth diode D6 and the second end 32B of the high-voltage side 32 of the step-up transformer 30 through the fourth capacitor C4. A first terminal of the fifth capacitor C5 is electrically connected between the fourth diode D4 and the third capacitor C3, and a second terminal of the fifth capacitor C5 is electrically connected between the fifth diode D5 and the third capacitor C3. between the fourth capacitor C4. Furthermore, the first terminal of the fifth capacitor C5 is electrically connected to a negative open circuit 50-, and the second terminal of the fifth capacitor C5 is electrically connected to a positive open circuit 50+.

When the high-voltage side 32 of the step-up transformer 30 outputs alternating current, the third diode D3, the fourth diode D4, the fifth diode D5, the sixth diode D6, the first The capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the fifth capacitor C5 can rectify and boost an alternating current of the high-voltage power into a high-voltage direct current. Specifically, when the first terminal 32A of the high-voltage side 32 outputs current, the current can flow to the second terminal 32B of the high-voltage side 32 through the first capacitor C1 and the third diode D3, or it can It flows to the positive open circuit 50+ through the second capacitor C2 and the fifth diode D5. When the second terminal 32B of the high-voltage side 32 outputs current, the current can flow to the positive open circuit 50+ through the sixth diode D6 and the fifth diode D5, or can also flow through the third capacitor C3, The fourth diode D4 and the first capacitor C1 flow back to the first terminal 32A of the high-voltage side 32 . Therefore, the positive open circuit 50+ will be the positive terminal receiving the positive current, and the negative open circuit 50- will be the negative terminal receiving the negative current. In this embodiment, the mosquito net 50 steps up and rectifies the 600V AC voltage output by the high-voltage side 32 of the step-up transformer 30 into a DC voltage of about 3000V. When mosquitoes fly between the positive electrode open circuit 50+ and the negative electrode open circuit 50-, the low-resistance mosquitoes can be shocked by high-voltage electric discharge.

In addition, the power switch 80 is used to control the entire total power supply. In terms of use, before actively catching mosquitoes, the user needs to first activate the power switch 80 to turn on the power switch 80, and then activate the push switch 40 to turn on the push switch 40, thus ensuring the series connection. The push switch 40 and the power switch 80 can be turned on at the same time, so as to facilitate the conduction of the circuit between the battery placement slot 20 and the low-voltage side 31 of the step-up transformer 30 .

When the power switch 80 and the push switch 40 are turned on at the same time, the battery power stored in the battery unit 21 in the battery placement slot 20 can be output to the step-up transformer 30 through the push switch 40 and the power switch 80 The low voltage side 31. When only one of the power switch 80 and the push switch 40 is turned on at the same time, or when neither one is turned on, the circuit between the battery placement slot 20 and the low-voltage side 31 of the step-up transformer 30 cannot be turned on. , the battery power cannot be output to the low-voltage side 31 of the step-up transformer 30 . This is a safety measure. The user should stop activating the power switch 80 and the push switch 40 when not using the active mosquito trap of the present invention to ensure that when the user accidentally touches the push switch 40, the power switch 80 is still not activated, so the circuit between the battery placement slot 20 and the low-voltage side 31 of the step-up transformer 30 still fails to conduct. In this way, the user can be prevented from getting an electric shock when he accidentally touches the push switch 40 . The form of the power switch 80 is not limited. In this embodiment, the power switch 80 is a hand switch. In other embodiments, the power switch 80 may also be a toggle switch. When the user wants to actively catch mosquitoes, the user needs to first turn on the power switch 80 to start and turn on the power switch 80, and then press the push switch 40 to start and turn on the push switch 40 in order to activate the battery. The unit 21 outputs the battery power to the low-voltage side 31 of the step-up transformer 30 so that the high-voltage side 32 of the step-up transformer 30 generates power to the mosquito net 50 .

In addition, when the battery unit 21 outputs the battery power to the low-voltage side 31 of the step-up transformer 30, the second diode D2 between the external power port 60 and the step-up transformer 30 can prevent the battery power from flows to the trap light 70 that is electrically connected to the external power port 60 . Therefore, when the user turns on the circuit to allow the step-up transformer 30 to receive the battery power to catch mosquitoes, the trap light 70 does not light up because when the user actively catches mosquitoes, the user actively waves the safe and static device. The electric mosquito swatter chases mosquitoes, so there is no need to consume excess battery power to activate the trap lamp 70 to passively attract mosquitoes to fly into the mosquito net 50 . In other words, after the current of the battery power flows through the push switch 40, the first diode D1 and the power switch 80 respectively, it cannot pass through the second diode D2 and flow to the external power port 60 and the trap light. 70, so the circuit from the external power port 60 to the trap light 70 cannot be connected through the battery power.

When the external power port 60 is connected to the external power supply so that the external power port 60 outputs the external power to the step-up transformer 30 , the first diode D1 between the battery placement slot 20 and the step-up transformer 30 It can prevent the external power from flowing to the positive terminal 20P of the battery placement slot 20 when the power switch 80 and the push switch 40 are turned on at the same time, that is, it can avoid affecting the operation of the battery unit 21 in the battery placement slot 20 . In other words, after the current of the external power flows through the second diode D2, it cannot be conducted through the first diode D1 and flow to the positive terminal 20P, so the circuit of the battery unit 21 cannot be conducted through the external power.

In addition, the housing 10 further includes a hole 12 . The work light 90 is disposed in the housing 10 corresponding to the hole 12 . When the low-voltage side 31 of the step-up transformer 30 receives the battery power or the external power, the work light 90 connected in parallel with the step-up transformer 30 will also be activated by the battery power or the external power. The work light 90 that shines inside the housing 10 can emit light to the user outside the housing 10 through the hole 12 on the housing 10, so as to inform the user that the mosquito net 50 is in a power-on state. , please use the mosquito net 50 with caution.

In this embodiment, the housing 10 includes a front surface, a back surface opposite to the front surface, and a side surface between the front surface and the back surface. The hole 12 and the push switch 40 are located on the front of the housing 10 , the battery placement slot 20 is located on the back of the housing 10 , and the external power port 60 and the power switch 80 are located on the side of the housing 10 . The ground GND electrically connected to the trap light 70 and the work light 90 is a common ground. The trap light 70 and the work light 90 are each a light-emitting diode (LED). The trap light 70 emits blue light when it lights up, and the work light 90 emits red light when it lights up.

With the battery unit 21 of the present invention, no matter whether it is a rechargeable battery or a disposable battery, under normal use conditions, there is no need to worry about leaving the safe and stationary electric mosquito swatter at night. Connect the external power port 60 The battery unit 21 is charged when the external power is electrically connected to the external power source. Since the battery unit 21 does not have to be charged, there is no need to worry about overheating of the battery unit 21 and causing a fire when the safe and stationary electric mosquito swatter is left at night, making the safe and stationary electric mosquito swatter of the present invention It is safer to passively catch mosquitoes than the existing static electric mosquito swatters on the market.

10: Shell 11:Transparent window 20:Battery placement slot 20P: Positive end 20N: Negative terminal 21:Battery unit 30:Step-up transformer 31: Low voltage side 31A: First coil 31B: Second coil 32:High voltage side 32A: The first end of the high voltage side 32B: The second end of the high voltage side 40: Press switch 50:Mosquito net 50+: positive pole open circuit 50-: Negative open circuit 60:External power port 70:Trapping light 80:Power switch 90:Work light 100: base 101: Groove C1: first capacitor C2: second capacitor C3: The third capacitor C4: The fourth capacitor C5: The fifth capacitor D1: first diode D2: Second diode D3: The third diode D4: The fourth diode D5: The fifth diode D6: The sixth diode GND: ground Q:Transistor R1: first resistor

Figure 1 is an appearance view of a safe and stationary electric mosquito swatter according to the present invention. Figure 2 is another appearance view of the safe and stationary electric mosquito swatter according to the present invention. Figure 3 is a schematic circuit diagram of the safe and stationary electric mosquito swatter of the present invention.

20:Battery placement slot

20P: Positive end

20N: Negative terminal

21:Battery unit

30:Step-up transformer

31: Low voltage side

31A: First coil

31B: Second coil

32:High voltage side

32A: The first end of the high voltage side

32B: The second end of the high voltage side

40: Press switch

50:Mosquito net

50+: positive pole open circuit

50-: Negative open circuit

60:External power port

70:Trapping light

80:Power switch

90:Work light

C1: first capacitor

C2: second capacitor

C3: The third capacitor

C4: The fourth capacitor

C5: The fifth capacitor

D1: first diode

D2: Second diode

D3: The third diode

D4: The fourth diode

D5: The fifth diode

D6: The sixth diode

GND: ground

Q:Transistor

R1: first resistor

Claims (10)

A safe and static electric mosquito swatter, including: a casing; a battery placement slot arranged in the casing; a step-up transformer arranged in the casing and having a low-voltage side and a high-voltage side; wherein the low-voltage side It includes an oscillating circuit; a push switch, which is arranged on the casing and is connected in series between the battery placement slot and the oscillating circuit; a mosquito net connected to the casing and extending from the outside of the casing to the inside of the casing and electrically connected The high-voltage side of the step-up transformer; an external power port disposed on the casing and electrically connected to the oscillation circuit on the low-voltage side; a trap light disposed in the casing and electrically connected to the external power port; wherein, When the push switch is pressed by an external force and is activated, the push switch is turned on; when the push switch is not pressed and is not activated, the push switch is not turned on; wherein, when a battery unit is installed in the battery placement slot When, and when the push switch is activated, the battery unit in the battery placement slot outputs a battery power to the oscillator circuit on the low-voltage side. The oscillation circuit converts the battery power into a low-voltage alternating current, and the oscillator circuit converts the battery power into a low-voltage alternating current, and the battery unit in the battery placement slot outputs a battery power to the oscillation circuit on the low-voltage side. Generate a high-voltage power to the mosquito net; wherein, when the external power port is connected to an external power supply and the push switch is not turned on, the external power supply outputs an external power to the oscillator circuit on the low-voltage side through the external power port. and the trap light, so that the trap light lights up, and the oscillation circuit converts the external power into the low-voltage alternating current, and generates the high-voltage power from the high-voltage side to the mosquito net, and the battery is placed in the slot to the booster There is no conduction between the low-voltage sides of the transformer to prevent external power from charging the battery unit in the battery slot. The safe and stationary electric mosquito swatter as described in claim 1 further includes: A power switch is connected in parallel and series with the push switch between the battery placement slot and the low voltage side of the step-up transformer; wherein, when the push switch and the power switch are turned on at the same time, the battery unit can pass through the battery The placement slot outputs the battery power to the low voltage side of the step-up transformer. The safe and stationary electric mosquito swatter as claimed in claim 1 further includes: a base having a groove, and the groove of the base can accommodate a portion of the housing to allow the housing to be stood upright. The safe and stationary electric mosquito swatter as claimed in claim 1, further comprising: a first diode connected in series with the push switch between the battery placement slot and the low voltage side of the step-up transformer, and Pointed to the low voltage side of the step-up transformer. The safe and stationary electric mosquito swatter as claimed in claim 1, further comprising: a ground; wherein, the battery placement slot includes a positive terminal and a negative terminal; wherein, the positive terminal of the battery placement slot passes through the push switch The low voltage side of the step-up transformer is electrically connected, and the negative terminal of the battery placement slot is electrically connected to the ground. The safe and stationary electric mosquito swatter as described in claim 5, wherein: the casing includes a transparent window; the trap light is disposed between the ground and the external power port, and the trap light is disposed in the casing corresponding to the At the transparent window; when the external power supply outputs the external power through the external power port, the trap light will light up and emit light through the transparent window. The safe and stationary electric mosquito swatter as claimed in claim 5, further comprising: a second diode, electrically connected between the external power port and the low voltage side of the step-up transformer, and directed towards the step-up transformer of the low voltage side. The safe and stationary electric mosquito swatter as described in claim 7, further comprising: a work light, and the low voltage side of the step-up transformer is connected in parallel between the second diode and the ground electrically connected to the negative terminal. Wherein, the casing includes a hole, and the work light is disposed in the casing corresponding to the hole; wherein, when the low-voltage side of the step-up transformer receives the battery power or the external power, the step-up transformer is connected in parallel. The work light of the voltage transformer is activated by the battery power or the external power, and emits light from the hole in the casing to the outside of the casing. The safe and stationary electric mosquito swatter as described in claim 1, wherein: the external power port is a Micro-Universal Serial Bus (Micro-USB) port. The safe and static electric mosquito swatter as described in claim 5, wherein the oscillation circuit includes: a transistor, which is NPN type and has a collector, a base and an emitter; and a first resistor, Electrically connected to the base of the transistor; wherein, the low-voltage side has a low-voltage coil and an inductor, and a first end of the low-voltage coil is electrically connected to the external power port, the push switch and the collector of the transistor ; wherein, a second end of the low-voltage coil is electrically connected to the first resistor, and the second end of the low-voltage coil is electrically connected to the base of the transistor through the first resistor; wherein, the emitter of the transistor The emitter of the transistor is electrically connected to the ground through the inductor.

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