CN110476920A - Pressure inductive electric mosquito flap - Google Patents
Pressure inductive electric mosquito flap Download PDFInfo
- Publication number
- CN110476920A CN110476920A CN201910736601.1A CN201910736601A CN110476920A CN 110476920 A CN110476920 A CN 110476920A CN 201910736601 A CN201910736601 A CN 201910736601A CN 110476920 A CN110476920 A CN 110476920A
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- pressure
- capacitor
- central processing
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- 241000255925 Diptera Species 0.000 title claims abstract description 44
- 230000001939 inductive effect Effects 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 239000004065 semiconductor Substances 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 241000238631 Hexapoda Species 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008029 eradication Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M3/00—Manual implements, other than sprayers or powder distributors, for catching or killing insects, e.g. butterfly nets
- A01M3/02—Fly-swatters
- A01M3/025—Fly-swatters using electrocution
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9645—Resistive touch switches
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
Abstract
The present invention discloses a kind of pressure inductive electric mosquito flap, including power supply circuit, discharge booster circuit and MCU central processing circuit, the power supply circuit provides required power supply for electric discharge booster circuit, wire side W is provided on the electric discharge booster circuit, the wire side W voltage of MCU central processing circuit control electric discharge booster circuit, it is characterized in that, it further include having pressure sensitive circuit, the pressure sensitive circuit includes pressure drag inductosyn R7, resistance R8 and capacitor C2, the pressure drag inductosyn R7 is arranged in the handle surfaces of electric mosquito flap, and VCC end of the one end of pressure drag inductosyn R7 as power input, the other end is connect with resistance R8, resistance R8 other end ground connection, one end of the capacitor C2 is grounded, the other end is connected between pressure drag inductosyn R7 and resistance R8, and It is connected to MCU central processing circuit together；Such electric mosquito flap has easy to use, safe, and the advantage etc. that electric mosquito effect is good.
Description
Technical field
The present invention relates to electric mosquito flap technical field, especially a kind of pressure inductive electric mosquito flap.
Background technique
Existing electric mosquito flap, opening ways have common key-press formula and capacitance touching control formula, still, both key modes,
There are still following shortcomings: (1) common key-press has poor contact, operates and is easy phenomena such as tired, and capacitance touching control formula, then holds
Easily arbitrarily triggering exports high pressure, has hidden danger, and easily interference, easy to failure etc. to child；(2) boost mode is to utilize three
The transformer of a winding forms self-maintained circuit with triode to realize, the mode power consumption is big, when such as wire side short circuit, device temperature
Liter is high, and triode (about 130 degree or more) is easily damaged；(3) traditional electric mosquito flap, power is non-adjustable, and conventional mosquito eradication can be with, but goes out
Fly or the insect bigger than mosquito are killed with regard to helpless.
Summary of the invention
The purpose of the present invention is to provide a kind of easy to use, safe, and the pressure inductive electricity mosquito that electric mosquito effect is good
It claps.
The object of the present invention is achieved like this:
A kind of pressure inductive electric mosquito flap, including power supply circuit, electric discharge booster circuit and MCU central processing circuit, the power supply
Circuit provides required power supply for electric discharge booster circuit, is provided with wire side W, MCU central processing circuit on the electric discharge booster circuit
The wire side W voltage of control electric discharge booster circuit, characterized in that it further include having pressure sensitive circuit, the pressure sensitive circuit packet
It includes pressure drag inductosyn R7, resistance R8 and the handle of electric mosquito flap is arranged in capacitor C2, the pressure drag inductosyn R7
On surface, and VCC end of the one end of pressure drag inductosyn R7 as power input, the other end are connect with resistance R8, resistance
R8 other end ground connection, one end ground connection of the capacitor C2, the other end is connected between pressure drag inductosyn R7 and resistance R8,
And it is connected to MCU central processing circuit together；Such electric mosquito flap, when manpower holds handle of electric mosquito-swatter, it is necessary to the pressure of handle
Resistance sense inductive transducer R7 applies corresponding pressure, pressure drag inductosyn R7 according to the variation of pressure, resistance value also with
Variation, and send resistance change signal to MCU central processing circuit, it is defeated by MCU central processing circuit through calculation process
Signal gives electric discharge booster circuit out, with adjustment (raising) wire side W voltage, realizes electric mosquito；Its whole operation is simple, and when use needs
Certain pressure is applied to handle, is otherwise not easy to open electric mosquito effect, maloperation is opened and existed when child's hand being avoided to take electric mosquito flap
Security risk, therefore, safety greatly improves, moreover, pat mosquito when, user keep apply certain pressure in handle ability
Electric mosquito is opened, gripping handle is more stable, is conducive to improve the effect for patting mosquito.
The purpose of the present invention can also be improved further below:
Further, the electric discharge booster circuit includes discharge circuit part and booster circuit part, and the discharge circuit includes
Capacitor C3, diode D2, resistance R9, resistance R10, resistance R11, step-up transformer T1 and metal-oxide-semiconductor Q2, one end of the capacitor C3
As the end VCC of power input, the other end connects diode D2, and the input both ends of the step-up transformer T1 are separately connected two poles
The end VCC at another end pipe D2 and capacitor C3, the both ends of the resistance R3 are attempted by the both ends of capacitor C3, the metal-oxide-semiconductor Q2's
Source electrode ground connection, drain electrode are connected to the one end for the step-up transformer T1 connecting with diode, and grid connects resistance R10, and resistance R10 is another
One end connects MCU central processing circuit, and the both ends of resistance R11 are separately connected MUC central processing circuit, and other end ground connection is described
The output both ends of step-up transformer T1 connect booster circuit part, and the wire side W is connected on booster circuit part, the MCU
The resistance change signal that central processing circuit is sent according to pressure drag inductosyn R7, after calculation process, output
Pwm signal gives metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 to drive step-up transformer T1 according to the duty ratio of PMW, the electricity after step-up transformer boosting
Boosted circuit part is pressed to boost again, output to wire side W.
Further, the MCU central processing circuit includes chip IC, resistance R5, resistance R6 and capacitor C1, the capacitor
The both ends of C1 are separately connected the vdd terminal foot and VSS end feet of chip IC, the VSS end feet ground connection of the chip IC, resistance R5 and resistance
One end of R6 is separately connected the vdd terminal foot of chip IC, and VCC end of the other end of resistance R5 as power input, resistance R6's is another
The pwm signal output end of one end ground connection, chip IC connects resistance R10 and resistance R11, the resistance change signal of the chip IC
Input terminal connects pressure drag inductosyn R7, the resistance R8 of pressure sensitive circuit and three's common connection end of capacitor C2, with
Just pressure drag inductosyn R7 sends resistance change signal to chip IC through resistance letter variable signal input terminal, by chip
Electric discharge booster circuit is outputed signal to through pwm signal output end after IC calculation process.
Beneficial effects of the present invention are as follows:
(1) such electric mosquito flap, when manpower holds handle of electric mosquito-swatter, it is necessary to apply phase to the pressure drag inductosyn R7 of handle
The pressure answered, according to the variation of pressure, resistance value also changes pressure drag inductosyn R7 therewith, and resistance change is believed
It number sends MCU central processing circuit to, by MCU central processing circuit through calculation process, outputs signal to electric discharge booster circuit, with
(raising) wire side W voltage is adjusted, realizes electric mosquito；Its whole operation is simple, and when use needs to apply certain pressure to handle, otherwise
It is not easy to open electric mosquito effect, maloperation is opened and existing security risk when child's hand being avoided to take electric mosquito flap, and therefore, safety is big
It is big to improve, moreover, user keeps application certain pressure that could open electric mosquito in handle when patting mosquito, it is more steady to hold handle
It is fixed, be conducive to improve the effect for patting mosquito.
(2) it further more, PWM drives metal-oxide-semiconductor Q2, is boosted with two-winding transformer, in this cooperation boosting and industry for the first time
Using；Usual metal-oxide-semiconductor internal resistance is smaller, and switching loss is more much smaller than triode, thus temperature rise is small, and making for component has been effectively ensured
Use the service life；Two-winding transformer manufacture craft is simple, and primary and secondary to be dielectrically separated from easy to accomplish, use is more reliable.
(3) in addition, holding the dynamics difference of handle of electric mosquito-swatter according to manpower, MCU is answered by special algorithm, automatic output phase
PWM makes metal-oxide-semiconductor open corresponding power, keeps electric mosquito more humanized, and can go out fly or more than mosquito when the dynamics of application is slightly larger
Larger insect.
Detailed description of the invention
Fig. 1 is the circuit diagram of pressure inductive electric mosquito flap of the invention.
Fig. 2 is the fragmentary sectional view of electric mosquito flap of the invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
It sees figure 1 and figure 2, a kind of pressure inductive electric mosquito flap, including power supply circuit 1, electric discharge booster circuit 2 and the center MCU
Processing circuit 3, the power supply circuit 1 can be charging circuit, provide required power supply for electric discharge booster circuit 2, the electric discharge rises
Wire side W, the wire side W voltage of the control electric discharge booster circuit of MCU central processing circuit 3, characterized in that also are provided in volt circuit 2
It include pressure sensitive circuit 4, the pressure sensitive circuit 4 includes pressure drag inductosyn R7, resistance R8 and capacitor C2, institute
It states pressure drag inductosyn R7 to be arranged on 6 surface of handle of electric mosquito flap, and one end conduct of pressure drag inductosyn R7
The end VCC of power input, the other end are connect with resistance R8, resistance R8 other end ground connection, one end ground connection of the capacitor C2, another
End is connected between pressure drag inductosyn R7 and resistance R8 and is connected to MCU central processing circuit, pressure drag induction type together
Sensor R7 senses that pressure change, resistance value also change therewith, and sends resistance change signal to MCU central processing
Circuit, MCU central processing circuit output signal to electric discharge booster circuit after calculation process, to adjust wire side W voltage.
As shown in the figure, the electric discharge booster circuit 2 includes discharge circuit part and booster circuit part, the discharge circuit
Including capacitor C3, diode D2, resistance R9, resistance R10, resistance R11, step-up transformer T1 and metal-oxide-semiconductor Q2, the capacitor C3's
VCC end of the one end as power input, the other end connect diode D2, and the input both ends of the step-up transformer T1 are separately connected
The both ends at the end VCC at another end diode D2 and capacitor C3, the resistance R3 are attempted by the both ends of capacitor C3, the metal-oxide-semiconductor
The source electrode of Q2 is grounded, and drain electrode is connected to the one end for the step-up transformer T1 connecting with diode, and grid connects resistance R10, resistance
The R10 other end connects MCU central processing circuit, and the both ends of resistance R11 are separately connected MUC central processing circuit, and the other end is grounded,
The output both ends of the step-up transformer T1 connect booster circuit part, and the wire side W is connected on booster circuit part, described
The resistance change signal that MCU central processing circuit is sent according to pressure drag inductosyn R7, it is defeated after calculation process
Pwm signal gives metal-oxide-semiconductor Q2 out, and metal-oxide-semiconductor Q2 drives step-up transformer T1 according to the duty ratio of PMW, after step-up transformer boosting
The boosted circuit part of voltage boosts again, output to wire side.
In the present embodiment, the MCU central processing circuit 3 includes chip IC, resistance R5 and resistance R6, the capacitor C1's
Both ends are separately connected the vdd terminal foot and VSS end feet of chip IC, the VSS end feet ground connection of the chip IC, resistance R5 and resistance R6's
One end is separately connected the vdd terminal foot of chip IC, VCC end of the other end of resistance R5 as power input, the other end of resistance R6
Ground connection, the pwm signal output end of chip IC connect resistance R10 and resistance R11, the resistance change signal input of the chip IC
Pressure drag inductosyn R7, the resistance R8 of end connection pressure sensitive circuit 4 and three's common connection end of capacitor C2, to press
Resistance sense inductive transducer R7 sends resistance change signal to chip IC through resistance letter variable signal input terminal, is transported by chip IC
Electric discharge booster circuit is outputed signal to through pwm signal output end after calculation processing.
Lithium electricity electric mosquito flap is filled currently, popular, and much without lithium electric protection function in industry, this circuit was increased
It fills, over-discharge and short-circuit protection function.In the present embodiment, see that as shown in the figure, power supply circuit 1 includes diode D1, resistance R1-R4,
Metal-oxide-semiconductor Q1 and battery M etc., wherein resistance R1 and resistance R2 series connection is one group, and resistance R3 and resistance R4 series connection are another group,
In, resistance R2 other end ground connection, another termination chip IC of resistance R4, the both ends of diode D1 are separately connected resistance R1 and resistance
The grid of R3, the metal-oxide-semiconductor Q1 are connected between resistance R3 and resistance R4, and source electrode and drain electrode is separately connected battery M and resistance
The R3 other end, battery M other end ground connection；In addition, it is as shown in the figure, it further include having USB interface, two end interface of USB is separately connected resistance
R1 and resistance R2, the anode of battery are also connected with the end VCC of power input.When work, when the battery M voltage of electric mosquito flap is lower than 4V
When, MCU output pwm signal drives metal-oxide-semiconductor Q1, and USB charger electric current is charged by diode D1, metal-oxide-semiconductor Q1 to battery M, when
Metal-oxide-semiconductor Q1 is closed when being charged to 4.2V, stops charging to battery, realization overcharges function.
In the electric discharge booster circuit of the present embodiment, when the dynamics for being applied to handle of electric mosquito-swatter 6 reaches analog value, chip IC
Output pwm signal drive metal-oxide-semiconductor Q2, power on step-up discharge, when battery discharge arrive 2.8V when close metal-oxide-semiconductor Q2, disconnect liter
Volt circuit power supply realized playing function.In addition, connecting between the battery M positive terminal of the power supply circuit and the end power input VCC
There is short-circuit protector FS；So that in electric discharge or other reason short circuits, moment disconnects power supply to short-circuit protector FS.
And diode D3-D5, capacitor C4-C6 form three-level voltage-multiplying circuit, the voltage of transformer T1 output is through three-level multiplication of voltage
It boosts again, to achieve the purpose that electric mosquito, electric fly or other insects.
Working principle: when manpower holds handle of electric mosquito-swatter 6, it is necessary to while the pressure drag inductosyn on handle 6
R7 applies corresponding pressure, and pressure drag inductosyn R7 also changes therewith according to the variation of pressure, resistance value, and by resistance
Value variable signal sends MCU central processing circuit 3 to, by the chip IC of MCU central processing circuit 3 through calculation process, is believed by PWM
Number output end exports PMW signal and gives electric discharge booster circuit 2, it may be assumed that output pwm signal gives metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 to be accounted for according to PMW's
Sky boosts again than the boosted circuit part of voltage after driving step-up transformer T1, step-up transformer T1 boosting, output to net
Face W realizes electric mosquito with adjustment (raising) wire side W voltage.
Claims (3)
1. pressure inductive electric mosquito flap, including power supply circuit (1), electric discharge booster circuit (2) and MCU central processing circuit (3), institute
Power supply needed for power supply circuit (1) provides for electric discharge booster circuit (2) is stated, is provided with wire side W on the electric discharge booster circuit (2),
The wire side W voltage of MCU central processing circuit (3) control electric discharge booster circuit, characterized in that further include having pressure sensitive circuit
(4), the pressure sensitive circuit (4) includes pressure drag inductosyn R7, resistance R8 and capacitor C2, and the pressure drag induction type passes
Sensor R7 is arranged on handle (6) surface of electric mosquito flap, and VCC of the one end of pressure drag inductosyn R7 as power input
End, the other end are connect with resistance R8, resistance R8 other end ground connection, and one end ground connection of the capacitor C2, the other end is connected to pressure drag
It is connected to MCU central processing circuit, pressure drag inductosyn R7 induction between inductosyn R7 and resistance R8 and together
To pressure change, resistance value also changes therewith, and sends resistance change signal to MCU central processing circuit, the center MCU
Processing circuit (3) outputs signal to electric discharge booster circuit (2), after calculation process to adjust wire side W voltage.
2. pressure inductive electric mosquito flap according to claim 1, characterized in that the electric discharge booster circuit (2) includes electric discharge
Circuit part (21) and booster circuit part (22), the discharge circuit (21) include capacitor C3, diode D2, resistance R9, electricity
VCC end of the one end of R10, resistance R11, step-up transformer T1 and metal-oxide-semiconductor Q2, the capacitor C3 as power input is hindered, it is another
End connection diode D2, the input both ends of the step-up transformer T1 are separately connected another end diode D2 and capacitor C3
The end VCC, the both ends of the resistance R3 are attempted by the both ends of capacitor C3, the source electrode ground connection of the metal-oxide-semiconductor Q2, and drain electrode is connected to and two
One end of the step-up transformer T1 of pole pipe connection, grid connect resistance R10, and the resistance R10 other end connects MCU central processing circuit
(3), the both ends of resistance R11 are separately connected MUC central processing circuit (3), other end ground connection, the output of the step-up transformer T1
Both ends connect booster circuit part (22), and the wire side W is connected on booster circuit part (22), the MCU central processing electricity
The resistance change signal that road (3) is sent according to pressure drag inductosyn R7, after calculation process, output pwm signal
Metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 is given to drive step-up transformer T1 according to the duty ratio of PMW, the voltage after step-up transformer boosting is boosted
Circuit part (22) boosts again, output to wire side W.
3. pressure inductive electric mosquito flap according to claim 2, characterized in that the MCU central processing circuit (3) includes core
Piece IC, resistance R5, resistance R6 and capacitor C1, the both ends of the capacitor C1 are separately connected the vdd terminal foot and VSS end feet of chip IC,
The VSS end feet of the chip IC is grounded, and one end of resistance R5 and resistance R6 are separately connected the vdd terminal foot of chip IC, resistance R5's
VCC end of the other end as power input, the other end ground connection of resistance R6, the pwm signal output end of chip IC connect resistance R10
With resistance R11, the pressure drag induction type sensing of resistance change signal input part connection pressure sensitive circuit (4) of the chip IC
Three's common connection end of device R7, resistance R8 and capacitor C2, so that pressure drag inductosyn R7 passes through resistance change signal
Resistance letter variable signal input terminal sends chip IC to, by outputing signal to after chip IC calculation process through pwm signal output end
Discharge booster circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736601.1A CN110476920A (en) | 2019-08-09 | 2019-08-09 | Pressure inductive electric mosquito flap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736601.1A CN110476920A (en) | 2019-08-09 | 2019-08-09 | Pressure inductive electric mosquito flap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110476920A true CN110476920A (en) | 2019-11-22 |
Family
ID=68550528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910736601.1A Pending CN110476920A (en) | 2019-08-09 | 2019-08-09 | Pressure inductive electric mosquito flap |
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| CN (1) | CN110476920A (en) |
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| TW200701886A (en) * | 2005-07-06 | 2007-01-16 | Ming Lan | Airflow-typed electronic mosquito swatter |
| JP3129505U (en) * | 2006-12-11 | 2007-02-22 | 陳梭徳 | Dengeki Mosquito Racket |
| CN101822243A (en) * | 2009-03-23 | 2010-09-08 | 单威园 | Safety electric mosquito swatter capable of automatically releasing high-voltage charge when human touch net |
| CN204418927U (en) * | 2014-12-31 | 2015-06-24 | 上海强星通信集团有限公司 | A kind of children's safety information box chamber door |
| CN105057132A (en) * | 2015-08-20 | 2015-11-18 | 郭江阳 | Shower head with pressure automatic water output function and shaftless power generation device |
| CN105656128A (en) * | 2016-02-05 | 2016-06-08 | 广州莫昆信息科技有限公司 | Electronic mosquito swatter internet of Things system |
| CN206332614U (en) * | 2016-10-26 | 2017-07-14 | 重庆华数机器人有限公司 | A kind of blocking power supply |
| CN208490663U (en) * | 2018-05-31 | 2019-02-15 | 深圳市康铭盛科技实业股份有限公司 | A kind of multifunctional safe electric mosquito flap |
| CN109548771A (en) * | 2018-12-27 | 2019-04-02 | 佛山市顺德区乐雪儿电器有限公司 | Electromagnetism charge inductive type electric mosquito flap |
| CN210017558U (en) * | 2019-03-22 | 2020-02-07 | 佛山市顺德区乐雪儿电器有限公司 | Resistance induction type electric mosquito swatter |
| CN211129513U (en) * | 2019-08-09 | 2020-07-31 | 关铭佳 | Pressure induction type electric mosquito swatter |
-
2019
- 2019-08-09 CN CN201910736601.1A patent/CN110476920A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200701886A (en) * | 2005-07-06 | 2007-01-16 | Ming Lan | Airflow-typed electronic mosquito swatter |
| KR200403148Y1 (en) * | 2005-09-06 | 2005-12-09 | 송성용 | Potable electric kill insecticide device |
| JP3129505U (en) * | 2006-12-11 | 2007-02-22 | 陳梭徳 | Dengeki Mosquito Racket |
| CN101822243A (en) * | 2009-03-23 | 2010-09-08 | 单威园 | Safety electric mosquito swatter capable of automatically releasing high-voltage charge when human touch net |
| CN204418927U (en) * | 2014-12-31 | 2015-06-24 | 上海强星通信集团有限公司 | A kind of children's safety information box chamber door |
| CN105057132A (en) * | 2015-08-20 | 2015-11-18 | 郭江阳 | Shower head with pressure automatic water output function and shaftless power generation device |
| CN105656128A (en) * | 2016-02-05 | 2016-06-08 | 广州莫昆信息科技有限公司 | Electronic mosquito swatter internet of Things system |
| CN206332614U (en) * | 2016-10-26 | 2017-07-14 | 重庆华数机器人有限公司 | A kind of blocking power supply |
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| CN109548771A (en) * | 2018-12-27 | 2019-04-02 | 佛山市顺德区乐雪儿电器有限公司 | Electromagnetism charge inductive type electric mosquito flap |
| CN210017558U (en) * | 2019-03-22 | 2020-02-07 | 佛山市顺德区乐雪儿电器有限公司 | Resistance induction type electric mosquito swatter |
| CN211129513U (en) * | 2019-08-09 | 2020-07-31 | 关铭佳 | Pressure induction type electric mosquito swatter |
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