A mosquito-repellent incense device circuit structure and manufacturing method

Abstract

The application discloses a mosquito-repellent device circuit structure and a manufacturing method, which can realize modular production, and comprises an upper shell and a lower shell. The upper shell and the lower shell are adaptively arranged, the upper shell has an upper shell metal cap stroke limiting hole, and the lower shell has a lower shell metal cap stroke limiting hole. The application has the advantages that a switch / indicator lamp / indicator lamp resistor / fuse module / small load and a plug connecting metal cap are integrated into a complete shell module, the traditional soldering or copper sheet wrapping connection process is cancelled, manual work is reduced, the traditional wire harness in the traditional electric appliance is freed, a wireless harness circuit is realized, manual wiring and manual assembly of the circuit into a plastic shell are freed, automatic assembly of the electric appliance is realized, the cost is lower, and the production capacity is much higher than the manual production capacity.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of household appliances, and relates to a mosquito incense device circuit structure capable of realizing modular production and a manufacturing method. BACKGROUND

[0002] Traditional mosquito incense devices are various in type and appearance, and are updated in real time. The sizes of various products are different. The patent document CN210143668U discloses a portable electric mosquito incense device, which comprises a shell, a buckle arranged on the shell, an electric mosquito incense bottle mounted on the shell through the buckle, a 220V AC power socket arranged outside the shell, and a control assembly arranged inside the shell. A heating sheet is arranged in the electric mosquito incense bottle. The control assembly comprises a controller, a battery assembly, a temperature sensor, an LED indicator, and a voltage reduction and rectification conversion module connected with the 220V AC power socket. The battery assembly, the USB power interface, the temperature sensor, the LED indicator, and the voltage reduction and rectification conversion module are respectively connected with the controller. The battery assembly is connected with the voltage reduction and rectification conversion module. In addition, the patent document CN212993997U also discloses a WiFi and voice controlled electric heating liquid mosquito incense device, which belongs to the field of household appliances and is composed of a mosquito incense device body, a power module, and a control module. The mosquito incense device body comprises a shell, a container bottle, a wick, and a PTC heater. The shell is a mounting box structure with a connecting port and an evaporation channel port. The connecting port has a mounting hole on the upper surface. The container bottle is connected to the connecting port. The wick is connected between the upper and lower mounting holes. The PTC heater is installed around the wick below the evaporation channel port. The power module comprises a power plug, a switch, and a power control board. The power plug is connected to the outer side of the shell. The switch is a touch switch and is installed on the corresponding side of the power plug on the outer side of the shell. The power control board is a control board for controlling the power supply of the PTC heater according to signal instructions and is installed at the upper end in the shell. The power control board is connected to the power plug through the switch. The control module is a WiFi and voice integrated control module installed on one side of the switch in the shell and connected to the power control board.

[0003] The above-mentioned different types of mosquito incense devices have complex materials, many connection points, and large demand for manual work. Although they are constantly improved, they still cannot get rid of the disadvantage of manually assembling the circuit into the plastic shell. In particular, in order to adapt to different products, flexible power lines are used to connect various accessories and assemble them into different product plastic parts. This is the most common and simplest connection method. In particular, for the common plug on the market, in order to achieve 90° rotation without affecting use, only flexible power lines can be used. Different product design styles are different, and the positions of the switch buttons have up and down deviations. In addition, there are deviations in the positions of the indicator lights. Therefore, manual operation and assembly are required, and complete modularization and automatic production cannot be achieved. SUMMARY

[0004] The present application aims at overcoming the above-mentioned deficiencies, and provides a mosquito incense device circuit structure and manufacturing method capable of realizing modular production, which solves the problem of removing flexible power lines in an electric circuit, replacing the power lines with metal pins, and overcomes the problem that flexible power lines cannot realize automation and modular production.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a mosquito incense device circuit structure capable of realizing modular production, characterized in that it comprises: a shell, the shell is divided into an upper shell and a lower shell, the upper shell and the lower shell are adaptively arranged, the upper shell has an upper shell metal cap stroke limiting hole, the lower shell has a lower shell metal cap stroke limiting hole, a copper plug plastic shell is arranged in the copper plug, the positive and negative poles of the copper plug are respectively connected with a first metal cap and a second metal cap, the first metal cap and the second metal cap are respectively sleeved with a first spring and a second spring, the first spring and the second spring are fixedly connected to one end of the upper shell, the upper shell is provided with a total of four pins, wherein the first pin has a first A end and a first B end, the first A end is connected with a spring clamping foot at the plug end, the first B end is connected with an elastic contact foot at the switch end, the second pin has a second A end and a second B end, the second A end is connected with an elastic contact foot at the switch end, the second B end is connected with an elastic contact foot at the circuit board end, the third pin has a third A end and a third B end, the third A end is connected with an elastic contact foot at the circuit board end, the third B end is connected with an elastic contact foot at the small load end, the fourth pin has a fourth A end, a fourth B end and a C end, the fourth A end is connected with a spring contact foot at the circuit board end, the fourth B end is connected with an elastic contact foot at the small load end, the C end is connected with a spring clamping foot at the plug end, the upper shell is centrally provided with an aluminum pipe hole through hole and a small load through hole, one end of the lower shell is provided with a plug circuit board stroke limiting groove and a plug switch stroke limiting groove, and the combination of the upper shell and the lower shell enables the auxiliary ribs to be attached to the four pins of the upper shell, wherein three pin auxiliary ribs arranged in the circuit board stroke limiting groove provide auxiliary force for the three pin elastic ends of the circuit board, and two pin auxiliary ribs arranged in the plug switch stroke limiting groove provide auxiliary force for the two pin elastic ends of the switch.

[0006] Another object of the present application is to provide a manufacturing method of the mosquito incense device circuit structure capable of realizing modular production, comprising:

[0007] First step, die punching: put the copper sheet into the die punching machine to punch out a chain belt with four pins;

[0008] Second step, in-mold injection: place the chain belt with four pins in the mold of the injection molding machine to perform in-mold injection, and integrally injection mold the four pins and the upper shell;

[0009] Third step, re-punching die: put into a new punching die machine, punch out the excess material, leaving the complete upper shell plastic part with stitches;

[0010] Fourth step, automatic assembly: in the upper shell plastic part, insert two springs into two spring card slots, then put on the metal cap, cover the lower shell, rivet and fix, rivet the upper shell riveting column through the lower shell riveting hole, and become a complete shell module.

[0011] Fifth step, assemble with ceramic heat sink: combine the complete shell module with the ceramic heat sink and rivet and fix with aluminum pipe;

[0012] Sixth step, fill sealant: punch sealant primer into the accommodating groove of the ceramic heat sink, then press the small load into the accommodating groove of the ceramic heat sink, so that the positive and negative electrode surfaces of the small load contact the needle, then punch sealant surface sealant for sealing, and then bake the shell module with the ceramic heat sink until the sealant is completely dry.

[0013] Seventh step, install circuit board: place the independent shell module with ceramic heat sink into the mosquito repellent device plastic lower shell, take the circuit board with automatic equipment, press the circuit board into the plug-in slot, and press the circuit board to the specified height position in the circuit board travel limiting groove, so that the circuit board contacts the needle and the power supply path;

[0014] Eighth step, install switch: take the switch with automatic equipment, press the switch into the switch slot, and press the switch to the specified height position in the switch travel limiting groove, so that the switch contacts the needle and the power supply path;

[0015] Ninth step, install plug: press the copper inner plug into the plastic outer plug, place the plastic outer plug with copper inner plug into the mosquito repellent device plastic lower shell, and make the positive and negative poles of the copper inner plug contact the first and second metal caps in the shell.

[0016] Tenth step, final assembly: assemble the mosquito repellent device plastic upper shell and button plastic parts to the mosquito repellent device plastic lower shell, and then rivet or screw the entire electric appliance.

[0017] The beneficial effects of the present application are:

[0018] First, the switch / indicator lamp / indicator lamp resistor / fuse module / small load and plug connecting metal cap are integrated into a complete shell module, eliminating the traditional soldering or copper skin wrapping connection process, reducing manual work, freeing from the constraints of traditional electric appliances, realizing wireless bundle circuit, freeing from manual wiring and assembling circuit lines into plastic shell, truly realizing automatic assembly of electric appliances, and the cost is lower, and the production capacity is much higher than manual production capacity.

[0019] Second, the small load (thermistor) module is heated by the circuit, the mosquito incense liquid is accelerated to evaporate in the air under the heat radiation environment, and the mosquito repellent effect is achieved.

[0020] Third, the on-off of the small load (thermistor) circuit is controlled by manually pressing the switch.

[0021] Fourth, because whether the small load (thermistor) is heated to work cannot be observed by naked eyes, the parallel indicator light module is used to determine whether the switch is on-off and whether the small load is in work by the on-off of the indicator light.

[0022] Fifth, the plug can be used at 90° rotation, the copper external plug connection wire structure is improved, the 90° rotation can still be connected with the metal cap to adapt to different socket requirements of different customers.

[0023] Sixth, the shell is divided into an upper shell and a lower shell, the upper and lower shells are fixed by riveting, the spring and the metal cap are installed before fixing, the four metal pins are molded and plastic-sealed in the upper shell of the outer shell, the spring and the metal cap are in contact with the pins to form a passage, and the pins are in tight contact with each part (circuit board, switch, PTC, plug) to realize the power passage.

[0024] Seventh, a spring and a metal cap are connected at the connection between the pin and the copper external plug, the spring has a certain elastic stroke between the metal cap and the copper external plug due to the elasticity of the spring, so that the mosquito incense heater plastic shell of various sizes can be adapted.

[0025] Eighth, the positive and negative electrodes of the PTC thermistor are on the left and right sides, and the power is realized by pin extrusion contact.

[0026] Ninth, the plug slot is divided into a plug slot and a switch slot, the pins in the two slots are lengthened, the mosquito incense device plastic shell of different appearance structures can be adapted, the height position of the switch and the circuit board can be adjusted, and the up-down direction of the indicator light in the circuit board can be adjusted.

[0027] Tenth, the height position of the switch and the circuit board can be adjusted by the extension of the spring metal cap, the extension limit slot of the circuit board and the switch can adjust the height position of the switch and the circuit board, and the mosquito incense heater with all rear indicator lights and rear switches can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is a whole explosion schematic diagram of a mosquito incense device circuit structure which can realize modular production;

[0029] Fig. 2 It is a decomposition rear view structure schematic diagram of a shell part of a mosquito incense device circuit structure which can realize modular production;

[0030] Fig. 3The exploded top view structure schematic diagram of the shell part of the mosquito incense device circuit structure which can realize modular production.

[0031] Significant:

[0032] 1- upper shell 1A- upper shell metal cap stroke limiting hole

[0033] 1B- small load (thermistor) through hole 1C- aluminum tube hole through hole

[0034] 1D- small load (thermistor) pin connection auxiliary rib 1E- insert circuit board slot

[0035] 1F- insert switch slot 1G- upper shell riveting column

[0036] 2- lower shell 2A- lower shell metal cap stroke limiting hole

[0037] 2B- small load (thermistor) through hole 2C- aluminum tube hole through hole

[0038] 2D- insert circuit board stroke limiting slot 2E- insert switch stroke limiting slot

[0039] 2F- connecting circuit board elastic pin auxiliary rib 2G- connecting switch elastic pin auxiliary rib

[0040] 2H- lower shell riveting column hole

[0041] 3- copper plug 3A- positive pin (bent) 3B- negative pin (bent)

[0042] 4- power supply contact elastic assembly 4A- first metal cap 4B- second metal cap 4C- first spring

[0043] 4D- second spring 5- first pin 5A- first pin spring catch foot

[0044] 5B- first pin elastic contact foot

[0045] 6- second pin 6A- second pin elastic contact foot (switch end)

[0046] 6B- second pin elastic contact foot (circuit board)

[0047] 7- third pin 7A- third pin elastic contact foot (circuit board end)

[0048] 7B- third pin elastic contact foot (small load end)

[0049] 8- fourth pin 8A- fourth pin elastic contact foot (circuit board end)

[0050] 8B - fourth pin elastic contact foot (small load end)

[0051] 8C - fourth pin spring detent foot 9 - switch 9A - switch metal connecting foot

[0052] 9B - switch detent auxiliary rib 10 - small load (circuit board) 10A - safety module

[0053] 10B - indicator light (patch)

[0054] 10C - indicator light resistor (patch) 10D - circuit board power supply connection contact copper surface

[0055] 11 - small load (thermistor) 11A - small load power supply contact silver surface

[0056] 12 - ceramic heat sink 12A - ceramic heat sink hole and aluminum tube through hole 12B - thermistor empty slot

[0057] 13 - aluminum tube 13A - aluminum tube stamping fixing position 14 - copper plug plastic shell

[0058] 15 - electric appliance plastic shell base 15A - plastic base to module shell detent groove DETAILED DESCRIPTION

[0059] Some terms are used in the description and claims to refer to certain components. As one skilled in the art will appreciate, hardware manufacturers can refer to a component using different names. This description and claims should not be limited as a result of the names used to refer to certain components. Rather, a component should be understood as a functional component, and references to a component should be understood as encompassing equivalents of that component that perform the same function. As used throughout this description and in the claims, "comprise" is an open term that is intended to encompass both unrecited elements and additional elements. "Substantially" means within acceptable manufacturing tolerances, and one skilled in the art would understand that the technical problem can be solved within acceptable manufacturing tolerances, and the technical effect can be substantially achieved. The description that follows describes preferred embodiments of the present application, and is intended to illustrate the general principles of the application, and is not intended to limit the scope of the application. The scope of the application is defined by the claims.

[0060] Please refer to Figs. 1 to 3 The present application provides a mosquito coil device circuit structure that can realize modular production, comprising:

[0061] The shell is divided into an upper shell and a lower shell, the upper shell and the lower shell are adaptively arranged, the upper shell has an upper shell metal cap stroke limiting hole, the lower shell has a lower shell metal cap stroke limiting hole, a copper plug plastic shell is arranged in the copper plug, the positive and negative poles of the copper plug are respectively connected with a first metal cap and a second metal cap, the first metal cap and the second metal cap are respectively sleeved with a first spring and a second spring, the first spring and the second spring are fixed to one end of the upper shell, the upper shell is provided with a total of four needle pins, wherein the first needle pin has a first A end and a first B end, the first A end is connected with a spring clamping pin of a plug end, the first B end is connected with an elastic contact pin of a switch end, the second needle pin has a second A end and a second B end, the second A end is connected with the elastic contact pin of the switch end, the second B end is connected with an elastic contact pin of a circuit board end, the third needle pin has a third A end and a third B end, the third A end is connected with the elastic contact pin of the circuit board end, the third B end is connected with an elastic contact pin of a small load end, the fourth needle pin has a fourth A end, a fourth B end and a C end, the fourth A end is connected with the elastic contact pin of the circuit board end, the fourth B end is connected with the elastic contact pin of the small load end, and the C end is connected with the spring clamping pin of the plug end, the upper shell is centrally provided with an aluminum pipe hole through hole and a small load through hole, a plug circuit board stroke limiting groove and a plug switch stroke limiting groove are arranged at one end of the lower shell, an auxiliary rib is arranged on the lower shell, the auxiliary rib is attached to the first to fourth total of four needle pins of the upper shell through the combination of the upper and lower shells, wherein three needle pin auxiliary ribs are arranged in the circuit board stroke limiting groove to provide auxiliary force for three needle pin elastic ends on the circuit board, and two needle pin auxiliary ribs are arranged in the plug switch stroke limiting groove to provide auxiliary force for two needle pin elastic ends connected with the switch. The advantages of such arrangement are that the needle pins are enhanced in force when contacting other components for power supply, the deformation of the needle pins is prevented, and the poor contact between the needle pins and the circuit board or the switch is avoided.

[0062] Further, the positive pin is in contact with the first metal cap, the first metal cap is in contact with the first spring, and the first spring is connected with the first A end of the first needle pin.

[0063] The negative pin is in contact with the second metal cap, the second metal cap is in contact with the second spring, and the second spring is connected with the C end of the fourth needle pin. The advantages of such arrangement are that because the spring has an extension stroke, different sizes of heaters have different distances between the copper plug and the shell module, the spring can be stretched and contracted without affecting the power supply, and the problem of different distances between the copper plug and the shell module is reasonably solved, and the copper plug and the shell module can be used in different electric appliance plastic shells.

[0064] Further, the first B end of the first needle pin is in contact with a switch metal connecting pin, and the switch metal connecting pin is inserted into a plug switch groove.

[0065] The switch metal connecting pin is connected with the second A end of the second pin, and is conducted to the second pin elastic contact pin 6B. The second B end of the second pin is connected with the circuit board power supply. The advantage of this arrangement is that the traditional soldering or copper skin wrapping connection process is cancelled, the manual work is reduced, the traditional electric wire harness is freed, and the wireless harness circuit connection is realized.

[0066] Further, the circuit board power supply forms two parallel branches after passing through the fuse module in the circuit board, wherein,

[0067] The first branch: the third pin is connected with the circuit board power supply contact surface, the current of the A end of the third pin is conducted to the third B end of the third pin, and is connected to one end of the small load. The other end of the small load is connected with the fourth B end of the fourth pin. The advantage of this arrangement is that the surface of the thermistor has positive and negative electrodes. The traditional method is high-temperature soldering connection, which not only consumes a lot of materials, but also needs high-temperature energy consumption. By changing the two-pole contact connection path of the metal pin and the small load, the flux, solder wire and other consumables can be saved, and the energy consumption connection can be achieved.

[0068] The second branch: the fuse module is connected to the indicator lamp through the indicator lamp resistance, and the indicator lamp is connected with the fourth A end of the fourth pin. The fourth A end of the fourth pin is connected with the fourth B end of the fourth pin in parallel and conducted to the C end of the fourth pin. The advantage of this arrangement is that only three pin positions are punched out by the punch, and the three-wire common connection in the traditional complex wiring method can be realized.

[0069] Further, the fourth A end of the fourth pin is connected with the circuit board power supply. The advantage of this arrangement is that the circuit is connected by the pin contact, the traditional electric wire harness is freed, and the wireless harness circuit connection is realized.

[0070] Further, the fourth B end of the fourth pin is connected with the small load. The advantage of this arrangement is that the surface of the thermistor has positive and negative electrodes. The traditional method is high-temperature soldering connection, which not only consumes a lot of materials, but also needs high-temperature energy consumption. By changing the two-pole contact connection path of the metal pin and the small load, the flux, solder wire and other consumables can be saved, and the energy consumption connection can be achieved.

[0071] Further, the fourth A end of the fourth pin is connected with the fourth B end of the fourth pin in parallel, and is connected with the C end of the fourth pin. The advantage of this arrangement is that only three pin positions are punched out by the punch, and the three-wire common connection in the traditional complex wiring method can be realized.

[0072] Further, the C end of the fourth pin is connected with the second spring in a clamping manner. The advantage of this arrangement is that the spring is profiled and cannot be connected with accessories by traditional soldering or copper sheet wrapping, but can be connected by simple clamping under pressure due to its elasticity.

[0073] Further, the travel limiting hole of the upper shell metal cap and the travel limiting hole of the lower shell metal cap are combined to form a complete metal cap travel limiting hole. The advantage of this arrangement is that the upper and lower shells form a complete metal cap travel limiting hole after combination, which can reduce the mold manufacturing difficulty and cost of the upper and lower shells and increase the production capacity of the shells.

[0074] The specific structure of the application is as follows:

[0075] The positive pole pin 3A is connected with the first metal cap 4A.

[0076] The first metal cap 4A is connected with the first spring 4C. Since the first spring 4C and the second spring 4D have elastic travel, they can be adapted to most mosquito incense heaters on the market.

[0077] The first spring 4C is connected with the first pin spring clamping foot 5A of the first pin 5. The pin serves to connect accessories and replace traditional flexible power lines to realize power conduction from the first pin spring clamping foot 5A to the first pin elastic connection foot 5B at the other end.

[0078] The switch 9 is inserted into the switch slot 1F, and the switch metal connecting foot 9A is connected with the first pin elastic contact foot 5B to form a power connection path.

[0079] The switch metal connecting foot 9A is connected with the second pin elastic contact foot (switch end) 6A, and is conducted to the second pin elastic contact foot (circuit board end) 6B. The second pin elastic contact foot (circuit board end) 6B is connected with the circuit board power connection contact copper surface 10D in the circuit board 10 to form a connection path. The circuit board power connection contact copper surface 10D is connected in parallel with the fuse module 10A in the circuit board 10.

[0080] Parallel circuit 1: the third pin elastic contact foot 7A is connected with the circuit board power connection contact copper surface 10D to form a parallel branch. The third pin elastic contact foot (circuit board end) 7A is conducted to the third pin elastic contact foot (small load end) 7B, and is connected with the small load power connection silver surface 11A in the small load 11.

[0081] Parallel circuit 2: the fuse module 10A is connected with the indicator lamp resistor (patch) 10C and the indicator lamp (patch) 10B.

[0082] Finally, the fourth pin elastic contact pin (circuit board end) 8A in the fourth pin 8 connects the circuit board power contact copper surface 10D, realizing the passage.

[0083] The fourth pin elastic contact pin (small load end) 8B connects the small load power source contact silver surface 11A, realizing the passage.

[0084] The fourth pin elastic contact pin (circuit board end) 8A and the fourth pin contact pin (small load end) 8B are connected in parallel to the fourth pin spring clamping pin 8C.

[0085] The fourth pin spring clamping pin 8C is clamped and connected with the second spring 4D.

[0086] The second spring 4D is connected with the second metal cap 4B and fixed in the upper shell metal cap stroke limiting hole 1A and the lower shell metal cap stroke limiting hole 2A, maintaining the passage.

[0087] The second metal cap 4B is in contact with the negative plug pin 3B, realizing the complete loop with the power supply.

[0088] The plug structure is redesigned, the connection between the plug and the power cord is improved, and the single pin connection is redesigned 90° (quarter circle modeling). In the rotation process, it can be connected with the metal cap and maintain the power supply path. When the plug is rotated within 90°, it does not affect the power supply.

[0089] A spring clamping is arranged between the metal cap and the pin, and a spring is arranged, so that the metal cap has elastic stroke and can be extended and contracted, so that the plug in different positions can maintain the power supply path.

[0090] In the module shell, a plug switch slot is arranged, and a stroke limiting slot is arranged, so that the switch can be pressed into the plug switch slot by pressing, the switch pin is in contact with the pin in the shell to realize the power supply path, and according to the actual up-down position requirement, the switch can be pressed to the required position in the stroke limiting slot.

[0091] In the module shell, a plug circuit board slot is arranged, and a stroke limiting slot is arranged, so that the double-sided circuit board with lamp can be pressed into the circuit board slot by pressing, the copper surface of the double-sided circuit board is in contact with the pin in the shell to realize the power supply path, and according to the actual up-down position requirement, the double-sided circuit board with lamp can be pressed to the required position in the stroke limiting slot.

[0092] The flexible power cord is changed into a metal pin, the metal pin is injected into the upper shell plastic part through in-mold injection to fix the metal pin, the metal pin is connected with each accessory, the tail end of the metal pin has elasticity, the circuit board and the switch pin can be well connected, and other consumables or packaging materials are not needed.

[0093] As a specific embodiment, a manufacturing method of a mosquito incense device circuit structure capable of realizing modular production comprises:

[0094] Step one, the shell (with spring and metal cap) is assembled in advance as a general part in stock.

[0095] Step two, the cooperation of the ceramic heat sink and the shell is realized by the equipment, and the aluminum pipe is riveted and fixed.

[0096] Step three, the inner sealant is glued in the ceramic thermistor containing groove, the thermistor PTC is pressed in, the path is realized through pin contact connection, the surface sealant is glued, and the PTC is fixed in the thermistor containing groove of the ceramic heat sink.

[0097] Step four, the shell connected with the ceramic heat sink is baked to dry the sealant.

[0098] Step five, the shell is placed in the plastic shell, then the circuit board and the switch are placed into the insertion slot of the shell, and the gas cylinder is extruded to the required position height.

[0099] Step six, the copper pin is pressed into the plastic external connection, and then is synchronously placed into the electric appliance plastic shell, so that one end of the copper pin is in contact with the metal cap of the shell to realize electrical connection.

[0100] Step seven, the other plastic parts of the electric appliance are combined with the lower shell, and are screw-fixed or ultrasonic riveted and fixed, so that the assembly of the whole electric appliance is completed.

[0101] As a specific embodiment, a manufacturing method of a mosquito incense device circuit structure capable of realizing modular production comprises:

[0102] First step, die punching: the copper sheet is placed into a die punching machine to punch out a chain belt with four pins;

[0103] Second step, in-mold injection: the chain belt with four pins is placed into a mold of an injection molding machine to perform in-mold injection, so that the four pins and the upper shell are integrally injection molded;

[0104] Third step, re-die punching: the chain belt with four pins is placed into a new die punching machine to punch out the excess edges and corners, and leave the complete upper shell plastic part with pins;

[0105] Fourth step, automatic assembly: in the upper shell plastic part, two springs are clamped into two spring clamping positions, and then a metal cap is sleeved, the lower shell is covered, riveting is performed, the upper shell riveting column passes through the lower shell riveting hole, riveting is performed, and a complete shell module is formed.

[0106] Fifth step, assembly with ceramic heat dissipation body: the complete shell module is combined with the ceramic heat dissipation body, and riveting is performed through the aluminum pipe.

[0107] Sixth step, filling of sealant: sealant is filled into the accommodating groove of the ceramic heat dissipation body, a small load is pressed into the accommodating groove of the ceramic heat dissipation body, the positive and negative electrode surfaces of the small load are in contact with the pins, sealant is filled to seal, and then the shell module with the ceramic heat dissipation body is baked until the sealant is completely dry.

[0108] Seventh step, assembly of circuit board: the independent shell module with the ceramic heat dissipation body is placed on the mosquito-repellent incense device plastic lower shell, the circuit board is taken by automatic equipment, the circuit board is in contact with the pins to form a power supply path.

[0109] Eighth step, assembly of switch: the switch is taken by automatic equipment, and the switch is in contact with the pins to form a power supply path.

[0110] Ninth step, assembly of plug: the copper inner plug is pressed into the plastic outer plug, the plastic outer plug with the copper inner plug is placed on the mosquito-repellent incense device plastic lower shell, and the positive and negative electrode positions of the copper inner plug are in contact with the first and second metal caps in the shell.

[0111] Tenth step, final assembly: the upper shell of the mosquito-repellent incense device plastic part and the switch are assembled to the mosquito-repellent incense device plastic lower shell, and then riveting or screwing is performed to fix the entire electric appliance.

[0112] Advantages of the application:

[0113] First, the switch / indicator lamp / indicator lamp resistor / fuse module / small load and plug connecting metal cap are integrated into a complete shell module, the traditional soldering or copper sheet wrapping connection process is cancelled, manual work is reduced, the traditional wire harness in the traditional electric appliance is eliminated, wireless harness circuit is realized, manual wiring and manual assembly of the circuit into the plastic shell are eliminated, automatic assembly of the electric appliance is truly realized, the cost is lower, and the production capacity is much higher than that of manual production.

[0114] Second, the small load (thermistor) module is heated through the circuit, the mosquito-repellent incense liquid is accelerated to volatilize in the heated radiation environment, is discharged into the air, and the mosquito-repellent effect is achieved.

[0115] Third, the on-off of the small load (thermistor) circuit is controlled by manually pressing the switch.

[0116] Fourth, because the small load (thermistor) whether fever work can not be observed by the naked eye, so through the parallel indicator module, through the indicator light and not light, determine the switch on-off, small load is in work.

[0117] Fifth, the plug can be used 90° rotation, improved copper plug-in wire modeling structure, to achieve a 90-degree rotation can still be connected with the metal cap contact, to adapt to different customers with different socket needs.

[0118] Sixth, the shell is divided into an upper shell and a lower shell, the upper and lower shells are fixed by riveting, and the spring and the metal cap are installed before fixing. Because the four metal pins are molded and plastic-sealed in the upper shell of the outer shell, the spring and the metal cap contact the pins to form a path, and the pins are in tight contact with each other (circuit board, switch, PTC, plug) to realize the power path.

[0119] Seventh, at the connection between the pin and the copper plug, a spring and a metal cap are added. Because of the elasticity of the spring, the metal cap and the copper plug have a certain elastic travel, so they can adapt to a variety of different sizes of mosquito incense heater plastic shells.

[0120] Eighth, the positive and negative electrodes of the PTC thermistor are on the left and right sides, and the power is realized by pin extrusion contact.

[0121] Ninth, the plug-in slot is divided into a plug-in slot and a switch slot, and the pins in the two slots are lengthened to adapt to different appearance structures of mosquito incense device plastic shells, and the height of the switch and the circuit board can be adjusted to the desired position, including the up and down direction of the indicator light in the circuit board.

[0122] Tenth, through the extension of the spring metal cap, the circuit board and the switch plug-in travel limit slot can adjust the height of the switch circuit board, and realize the adaptation of all rear indicator lights and rear switches of mosquito incense heaters.

[0123] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified by the above teachings or related art or knowledge within the scope of the application. The modifications and changes made by those skilled in the art without departing from the spirit and scope of the application shall be within the scope of protection of the appended claims.

Claims

1. A mosquito repellent device circuit structure capable of modular production, characterized by, The application relates to a shell, which is divided into an upper shell and a lower shell, the upper shell and the lower shell are adaptively arranged, the upper shell is provided with an upper-shell-metal-cap stroke limiting hole, the lower shell is provided with a lower-shell-metal-cap stroke limiting hole, a copper plug plastic shell is provided with a copper plug, positive and negative poles of the copper plug are respectively connected with first and second metal caps, the first and second metal caps are respectively sleeved with first and second springs, the first and second springs are fixed to one end of the upper shell, the upper shell is provided with a total of four needle pins, wherein the first needle pin is provided with a first A end and a first B end, the first A end is connected with a spring clamping pin of a plug end, the first B end is connected with an elastic contact pin of a switch end, the second needle pin is provided with a second A end and a second B end, the second A end is connected with the elastic contact pin of the switch end, the second B end is connected with an elastic contact pin of a circuit board end, the third needle pin is provided with a third A end and a third B end, the third A end is connected with the elastic contact pin of the circuit board end, the third B end is connected with an elastic contact pin of a small-sized load end, the fourth needle pin is provided with a fourth A end, a fourth B end and a C end, the fourth A end is connected with the elastic contact pin of the circuit board end, the fourth B end is connected with the elastic contact pin of the small-sized load end, and the C end is connected with the spring clamping pin of the plug end, the upper shell is provided with an aluminum pipe hole through hole and a small-sized load through hole in the center, a plug circuit board stroke limiting groove and a plug switch stroke limiting groove are arranged at one end of the lower shell, auxiliary ribs are arranged on the lower shell, the auxiliary ribs are attached to the first to fourth total four needle pins of the upper shell through the combination of the upper and lower shells, three needle pin auxiliary ribs in the circuit board stroke limiting groove provide auxiliary force for three needle pin elastic ends on the circuit board, two needle pin auxiliary ribs in the plug switch stroke limiting groove provide auxiliary force for two needle pin elastic ends connected with the switch. The positive and negative pole pins are designed in quarter circle shapes; First and fourth needle pin spring clamping pins are arranged between the first metal cap and the first needle pin and between the second metal cap and the fourth needle pin.

2. The mosquito repellent device circuit structure according to claim 1, wherein, The positive pole pin is connected with the first metal cap, the first metal cap is connected with the first spring, and the first spring is connected with the first A end of the first needle pin. The negative pole pin is connected with the second metal cap, the second metal cap is connected with the second spring, and the second spring is connected with the C end of the fourth needle pin.

3. The mosquito repellent device circuit structure according to claim 2, wherein, The first B end of the first needle pin is connected with a switch metal connecting pin, and the switch metal connecting pin is inserted into a plug switch groove. The switch metal connecting pin is connected with the second A end of the second needle pin, is conducted to a second needle pin elastic contact pin 6B, and the second B end of the second needle pin is connected with a circuit board power supply.

4. The mosquito repellent device circuit structure according to claim 3, wherein, The circuit board power supply forms two parallel branches after passing through an insurance module in the circuit board, wherein a first branch is connected with a third needle pin and a circuit board power supply contact surface, current of the A end of the third needle pin is conducted to the third B end of the third needle pin, is connected to one end of a small-sized load, and the other end of the small-sized load is connected with a fourth B end of the fourth needle pin. The second branch: the insurance module is reconnected to the indicator light through the indicator light resistor, and the indicator light is connected to the fourth A end of the fourth pin, which is connected to the C end of the fourth pin in parallel with the fourth B end of the fourth pin.

5. The electric circuit structure of mosquito repellent device capable of modular production as claimed in claim 2 wherein, The fourth A end of the fourth pin is connected to the circuit board power supply.

6. The electric circuit structure of mosquito repellent device capable of modular production as claimed in claim 5 wherein, The fourth B end of the fourth pin is connected to a small load.

7. The electric circuit structure of mosquito repellent device capable of modular production as claimed in claim 6 wherein, The fourth A end of the fourth pin is connected to the C end of the fourth pin in parallel with the fourth B end.

8. The electric circuit structure of mosquito repellent device capable of modular production as claimed in claim 7 wherein, The C end of the fourth pin is connected to the second spring.

9. The electric circuit structure of mosquito repellent device capable of modular production as claimed in claim 8 wherein, The upper shell metal cap stroke limiting hole and the lower shell metal cap stroke limiting hole form a complete metal cap stroke limiting hole.

10. A method of manufacturing a mosquito repellent device circuit structure according to claim 1, wherein, Comprise: First step, die: put the copper sheet into the die machine, and punch out the chain belt with four pins; Second step, in-mold injection: place the chain belt with four pins in the injection molding machine mold, and perform in-mold injection to integrate the four pins with the upper shell; Third step, re-die: put it into a new die machine to punch out the excess corners, leaving a complete upper shell plastic part with pins; Fourth step, automatic assembly: insert two springs into two spring holders in the upper shell plastic part, then put on the metal cap, cover the lower shell, and rivet to fix the upper shell riveting column through the lower shell riveting hole to become a complete shell module; Fifth step, assemble with ceramic heat sink: combine the complete shell module with the ceramic heat sink and rivet it with the aluminum pipe; Sixth step, fill sealant: fill sealant into the container groove of the ceramic heat sink, then press the small load into the container groove of the ceramic heat sink so that the positive and negative electrode surfaces of the small load contact the pins, then fill sealant to seal, then bake the shell module with the ceramic heat sink until the sealant is completely dry; Seventh step, install circuit board: place the independent shell module with the ceramic heat sink on the mosquito repellent device plastic lower shell, and use automatic equipment to pick up the circuit board so that the circuit board contacts the pins for power supply; Eighth step, install switch: use automatic equipment to pick up the switch so that the switch contacts the pins for power supply; Ninth step, install plug: press the copper inner plug into the plastic outer plug, place the plastic outer plug with the copper inner plug on the mosquito repellent device plastic lower shell, and make the positive and negative poles of the copper inner plug contact the first and second metal caps in the shell; Tenth step, final assembly: assemble the mosquito repellent device plastic upper shell and the switch to the mosquito repellent device plastic lower shell, and then rivet or screw the entire appliance.

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