CN112471604A - Electronic cigarette, cigarette rod, cigarette cartridge and key control chip for electronic cigarette - Google Patents

Electronic cigarette, cigarette rod, cigarette cartridge and key control chip for electronic cigarette Download PDF

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Publication number
CN112471604A
CN112471604A CN202011453217.XA CN202011453217A CN112471604A CN 112471604 A CN112471604 A CN 112471604A CN 202011453217 A CN202011453217 A CN 202011453217A CN 112471604 A CN112471604 A CN 112471604A
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CN
China
Prior art keywords
control module
cigarette
verification
cartridge
signal
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Granted
Application number
CN202011453217.XA
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Chinese (zh)
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CN112471604B (en
Inventor
宋利军
贺玉婷
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Xi'an Wenxian Semiconductor Technology Co ltd
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Xi'an Wenxian Semiconductor Technology Co ltd
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Priority to CN202011453217.XA priority Critical patent/CN112471604B/en
Publication of CN112471604A publication Critical patent/CN112471604A/en
Priority to PCT/CN2021/122797 priority patent/WO2022073498A1/en
Application granted granted Critical
Publication of CN112471604B publication Critical patent/CN112471604B/en
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/65—Devices with integrated communication means, e.g. Wi-Fi

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses an electronic cigarette, a cigarette rod for the electronic cigarette, a cigarette cartridge and a key control chip. After the cigarette rod is correspondingly connected with the cigarette cartridge, the main control module sends a signal to the control module for key verification, the first switch tube is disconnected, the second switch tube is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the positive electrode, and the control module performs key verification after the signal is received by the receiving end of the control module; after the verification is effective, the control module sends a signal to the main control module for verification feedback, the second switch tube is switched on, the first switch tube is controlled by the sending end of the control module, the signal is sent to the main control module through the positive electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes the key verification. Counterfeit and shoddy smoke cartridges are prevented through key verification, the structure is simple, and the electronic cigarette is compatible with the existing electronic cigarette.

Description

Electronic cigarette, cigarette rod, cigarette cartridge and key control chip for electronic cigarette
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette, a cigarette rod for the electronic cigarette, a cigarette cartridge and a key control chip.
Background
In the prior art, the electronic cigarette is composed of a cigarette rod and a cigarette cartridge, the cigarette rod and the cigarette cartridge are used in a combined mode, the cigarette rod can be used for a long time, the cigarette cartridge is a disposable consumable, cigarette oil is arranged in the cigarette cartridge, and after the cigarette oil is consumed, the cigarette cartridge is discarded and is used by being combined with the cigarette rod through a new cigarette cartridge.
The interface between tobacco rod and the cigarette bullet includes mechanical interface and electrical interface, and electrical interface is mainly two electrodes to the cigarette bullet power supply, and among the prior art, after tobacco rod and cigarette bullet combine, the two directly can supply power and connect and can cooperate the use. This approach provides a chance for various counterfeit cartridges, thereby greatly encroaching upon the market share of regular cartridges.
To this, in order to realize the cigarette bullet anti-fake, need increase the information communication interface between cigarette bullet and the tobacco rod among the electrical interface, generally include power connection end, ground connection link, signal connection end etc. through this kind of information communication interface, carry out mutual authentication between cigarette bullet and the tobacco rod to it is not replaced by counterfeit product to have guaranteed the cigarette bullet. However, because the information communication interface is additionally arranged between the cigarette cartridge and the cigarette rod, the interface comprises a plurality of connecting ends, the electrical connection mode between the existing cigarette cartridge and the cigarette rod is changed, the hardware cost of the interface is increased, the physical structures of the cigarette cartridge and the cigarette rod are changed and become complex, the damage rate of the two is increased when the two are connected in an inserting mode, the universality is not strong, the existing electronic cigarette product cannot be compatible, and the satisfaction degree of user consumption experience is reduced.
Disclosure of Invention
The invention mainly solves the technical problem of providing an electronic cigarette, a cartridge for the electronic cigarette and a key control chip, and solves the problem that the cartridge and a tobacco rod of the electronic cigarette in the prior art are mutually subjected to security authentication in a low-complexity and low-cost mode, and the electronic cigarette is compatible with the existing electronic cigarette structure.
In order to solve the technical problems, the invention provides an electronic cigarette, which comprises a cigarette rod and a cigarette cartridge, wherein the cigarette rod comprises a battery, a positive driving electrode, a negative driving electrode and a main control module, a second switch tube is arranged between the positive electrode of the battery and the positive driving electrode, the on-off of the second switch tube is controlled by the sending end of the main control module, the receiving end of the main control module is electrically connected with the positive driving electrode, and the grounding end of the main control module is electrically connected with the negative driving electrode; the smoke cartridge comprises a positive electrode, a negative electrode and a control module, a first switch tube is further arranged between the positive electrode and the negative electrode of the smoke cartridge, a receiving end of the control module is electrically connected with the positive electrode of the smoke cartridge, and a sending end of the control module controls the first switch tube to be connected or disconnected; when the tobacco rod is correspondingly connected with the cigarette cartridge for use, the positive driving electrode and the negative driving electrode of the tobacco rod are correspondingly and respectively electrically connected with the positive electrode and the negative electrode of the cigarette cartridge; after the cigarette rod is correspondingly connected with the cigarette cartridge, the first switch tube is disconnected, the sending end of the main control module sends out a verification signal, the verification signal controls the second switch tube to be switched on or off, the verification signal is transmitted to the control module through the positive driving electrode and the positive electrode, and after the verification signal is received by the receiving end of the control module, the control module carries out key verification; after the verification is effective, the control module carries out verification feedback on the main control module, the second switch tube is connected, the sending end of the control module sends a feedback signal, the feedback signal controls the first switch tube to be connected or disconnected, the feedback signal is transmitted to the main control module through the positive electrode and the positive driving electrode, and the verification feedback is completed after the feedback signal is received by the receiving end of the main control module.
Preferably, the second switch tube in the tobacco rod is a P-type MOS tube or an N-type MOS tube.
Preferably, the first switch tube in the cartridge is an N-type MOS tube or a P-type MOS tube.
Preferably, a comparator is further arranged between the receiving end of the main control module in the tobacco rod and the positive driving electrode of the tobacco rod, the output end of the comparator is electrically connected with the receiving end of the main control module, one input end of the comparator inputs a reference voltage, and the other input end of the comparator is electrically connected with the positive driving electrode of the tobacco rod.
Preferably, the cartridge further comprises an internal power supply electrically connected with the positive electrode and used for supplying power to the control module.
A tobacco rod for an electronic cigarette comprises a battery, a positive driving electrode, a negative driving electrode and a main control module, wherein a second switch tube is arranged between the positive electrode of the battery and the positive driving electrode, the on-off of the second switch tube is controlled by the sending end of the main control module, the receiving end of the main control module is electrically connected with the positive driving electrode, and the grounding end of the main control module is electrically connected with the negative driving electrode; when the main control module sends a verification signal to the outside of the cigarette rod for key verification, the sending end of the main control module sends a verification signal, the verification signal controls the second switching tube to be switched on or off, and the verification signal is transmitted to the outside of the cigarette rod through the positive driving electrode; when receiving the feedback signal, the second switch tube is switched on, the receiving end of the main control module receives the feedback signal from the outside of the tobacco rod through the positive driving electrode, and after receiving, the main control module completes verification feedback.
Preferably, the second switch tube in the tobacco rod is a P-type MOS tube or an N-type MOS tube.
Preferably, a comparator is further arranged between the receiving end of the main control module in the tobacco rod and the positive driving electrode of the tobacco rod, the output end of the comparator is electrically connected with the receiving end of the main control module, one input end of the comparator inputs a reference voltage, and the other input end of the comparator is electrically connected with the positive driving electrode of the tobacco rod.
A cartridge for an electronic cigarette comprises a positive electrode, a negative electrode and a control module, wherein a first switch tube is arranged between the positive electrode and the negative electrode of the cartridge; when the control module receives a verification signal from the outside of the cigarette cartridge to perform key verification, the first switch tube is disconnected, the positive electrode receives the verification signal from the outside of the cigarette cartridge, and the control module performs key verification after the verification signal is received by the receiving end of the control module; and after the verification is valid, the sending end of the control module sends a feedback signal, the feedback signal controls the first switching tube to be switched on or off, and the feedback signal is sent to the outside of the smoke cartridge through the positive electrode.
Preferably, the first switch tube in the cartridge is an N-type MOS tube or a P-type MOS tube.
Preferably, the cartridge further comprises an internal power supply electrically connected with the positive electrode and used for supplying power to the control module.
A key control chip comprises a control module, a first switch tube, a signal pin and a grounding pin, wherein the first switch tube comprises two access ends and a controlled end, the two access ends are respectively and electrically connected with the signal pin and the grounding pin, the controlled end is electrically connected with a sending end of the control module, and a receiving end of the control module is electrically connected with the signal pin; when the control chip receives the verification signal, the first switch tube is disconnected, the signal pin receives the verification signal from the outside and then inputs the verification signal to the control module through the receiving end, after the key control chip performs key verification, the sending end of the control module sends a feedback signal, and the feedback signal controls the first switch tube to be switched on or switched off and sends the feedback signal to the outside through the signal pin.
Preferably, the first switch tube is an N-type MOS tube or a P-type MOS tube.
Preferably, the controller further comprises an internal power supply electrically connected with the signal pin and used for supplying power to the control module.
The invention has the technical effects that: the invention discloses an electronic cigarette, a cigarette rod for the electronic cigarette, a cigarette cartridge and a key control chip. After the cigarette rod is correspondingly connected with the cigarette cartridge, the main control module sends a signal to the control module for key verification, the first switch tube is disconnected, the second switch tube is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the positive electrode, and the control module performs key verification after the signal is received by the receiving end of the control module; after the verification is effective, the control module sends a signal to the main control module for verification feedback, the second switch tube is switched on, the first switch tube is controlled by the sending end of the control module, the signal is sent to the main control module through the positive electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes the key verification. Counterfeit and shoddy smoke cartridges are prevented through key verification, the structure is simple, and the electronic cigarette is compatible with the existing electronic cigarette.
Drawings
Figure 1 is a schematic diagram of the composition of an embodiment of an electronic cigarette according to the present invention;
figure 2 is a schematic diagram of the composition of another embodiment of an electronic cigarette according to the present invention;
figure 3 is a schematic view of the operating principle of the tobacco rod and cartridge in the electronic cigarette according to the invention;
figure 4 is a schematic diagram of the composition of an embodiment of a tobacco rod for use in an electronic cigarette according to the present invention;
figure 5 is a schematic composition diagram of another embodiment of a tobacco rod for use in an electronic cigarette according to the present invention;
figure 6 is a schematic diagram of the composition of an embodiment of a cartridge for use in an electronic cigarette according to the present invention;
figure 7 is a schematic composition diagram of another embodiment of a cartridge for use in an electronic cigarette according to the present invention;
fig. 8 is a schematic diagram of a key control chip according to the present invention.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the electronic cigarette includes a cigarette rod and a cigarette cartridge, the cigarette rod includes a battery BAT, a positive driving electrode OUT, a negative driving electrode GND and a master control module ZK, a second switch tube K2 is arranged between the positive electrode of the battery BAT and the positive driving electrode OUT, the second switch tube K2 is switched on or off under the control of a sending terminal ZKU of the master control module ZK, the sending terminal ZKU is used for sending signals to the outside of the cigarette rod, a receiving terminal ZKI of the master control module ZK is electrically connected with the positive driving electrode OUT, the receiving terminal ZKI is used for receiving signals from the outside of the cigarette rod, a grounding terminal ZKD is electrically connected with the negative driving electrode GND, a power supply terminal ZKC of the master control module ZK is electrically connected with the positive electrode of the battery BAT, and the negative electrode of the.
The smoke cartridge comprises an atomizer WHQ, a positive electrode P +, a negative electrode P-and a control module MK, wherein two power supply ends of the atomizer WHQ are electrically connected with the positive electrode P + and the negative electrode P-of the smoke cartridge, a first switch tube K1 is further arranged between the positive electrode P + and the negative electrode P-of the smoke cartridge, a receiving end MKI of the control module MK is electrically connected with the positive electrode P + of the smoke cartridge and is used for receiving signals from the outside of the smoke cartridge, a sending end MKU of the control module MK controls the first switch tube K1 to be switched on or switched off, and the sending end MKU is used for sending signals to the outside of the smoke cartridge.
When the cigarette rod is correspondingly connected with the cigarette cartridge for use, the positive driving electrode OUT and the negative driving electrode GND of the cigarette rod are correspondingly and respectively electrically connected with the positive electrode P + and the negative electrode P-of the cigarette cartridge; after the cigarette rod is correspondingly connected with the cigarette cartridge, the first switch tube K1 is disconnected, the sending end ZKU of the main control module ZK sends a verification signal, the verification signal controls the second switch tube K2 to be connected or disconnected, the verification signal is transmitted to the control module through the positive driving electrode OUT and the positive electrode P +, and the control module MK performs key verification after being received by the receiving end MKI of the control module MK; after the verification is valid, the control module MK performs verification feedback on the main control module ZK, the second switch tube K2 is connected, the sending end MKU of the control module MK sends a feedback signal, the feedback signal controls the first switch tube K1 to be connected or disconnected, the feedback signal is transmitted to the main control module ZK through the positive electrode P + and the positive driving electrode OUT, and the receiving end of the main control module ZK receives the feedback signal ZKI, so that the verification feedback is completed.
The first switching tube and the second switching tube are mainly realized by using an MOS tube as a main body, and mainly utilize the switching characteristic and the conduction characteristic of the MOS tube, wherein the first switching tube and the second switching tube comprise various realization modes of the MOS tube.
As can be seen from the embodiment shown in fig. 1, the key information interaction is implemented by using the original power supply interfaces of the cigarette rod and the cartridge, and the first switching tube and the second switching tube are switches implemented based on MOS tubes, and when the switching tubes are turned on, the switching tubes also have a smaller resistance value, so that although the first switching tube is connected in parallel to the two ends of the atomizer WHQ, when the key information interaction is performed, the voltage generated at the two ends of the atomizer by the battery power supply is mainly used for driving the first switching tube, the current mainly flows through the first switching tube, and the atomizer itself does not generate large power consumption or generate an atomization effect, because the current flowing through the atomizer is small and short, and is mainly used for key verification in a short time. If the verification is valid, the first switch tube is in a normally open state, so that the power supply heating of the atomizer is not influenced. If the authentication key is invalid, the second switch tube is normally opened, so that the battery cannot supply power to the cigarette cartridge. In addition, the first switch tube is arranged at two ends of the atomizer in a parallel connection mode, so that the connection mode of the atomizer does not need to be changed, and the two ends of the original atomizer can be connected with more than one circuit in parallel, so that the circuit disclosed by the invention can be additionally arranged on the existing smoke cartridge structure.
Preferably, referring to fig. 2, the second switching tube K2 in the smoke rod is a P-type MOS tube, a gate of the P-type MOS tube is electrically connected to the transmitting end ZKU of the main control module ZK, a source of the P-type MOS tube is electrically connected to the positive electrode of the battery BAT, and a drain of the P-type MOS tube is electrically connected to the positive driving electrode OUT of the smoke rod. When the transmitting terminal ZKU outputs a high voltage, the P-type MOS transistor is turned off between the gate and the source, and thus the P-type MOS transistor is also turned off between the drain and the source, and when the transmitting terminal ZKU outputs a low voltage, the P-type MOS transistor is turned on between the gate and the source, and thus the P-type MOS transistor is also turned on between the drain and the source. Therefore, when the sending end ZKU of the main control module ZK generates a high voltage, the drain electrode of the P-type MOS transistor is disconnected from the source electrode, and the positive electrode P + is electrically connected to the positive driving electrode OUT, and the other end of the atomizer is grounded, and the voltage of the positive electrode P + is 0, so the voltage MKI input to the receiving end MKI of the control module MK is 0 voltage, which may represent a signal "0" or "1"; when the sending end ZKU of the main control module ZK generates a low voltage, since the drain and the source of the P-type MOS transistor are connected, and the positive electrode P + is electrically connected to the positive driving electrode OUT, the voltage of the positive electrode P + is close to the battery voltage, i.e., a high voltage, the MKI input to the receiving end of the control module is a high voltage, which may represent a signal "1" or "0", thereby enabling transmission of the verification signal to the receiving end MKI of the control module MK. Preferably, the second switch tube K2 in the smoke rod may be an N-type MOS tube, a gate of the N-type MOS tube is electrically connected to the transmitting end ZKU of the main control module ZK, a source of the N-type MOS tube is electrically connected to the positive electrode of the battery BAT, and a drain of the N-type MOS tube is electrically connected to the positive driving electrode OUT of the smoke rod. When the transmitting terminal ZKU outputs a low voltage, the N-type MOS transistor is turned off between the gate and the source, and thus the drain and the source are also turned off, and when the transmitting terminal ZKU outputs a high voltage, which is higher than the battery voltage, the N-type MOS transistor is turned on between the gate and the source, and thus the drain and the source are also turned on.
Preferably, the first switch tube K1 in the cartridge is an N-type MOS tube, a gate of the N-type MOS tube is electrically connected to the transmitting end MKU of the control module MK, a source of the N-type MOS tube is electrically connected to the negative electrode P of the cartridge, and a drain of the N-type MOS tube is electrically connected to the positive electrode P +. When the transmitting terminal MKU outputs a high voltage, the gate and the source of the N-type MOS transistor are connected, and therefore the drain and the source of the N-type MOS transistor are also connected.
Preferably, the first switch tube K1 in the cartridge may also be a P-type MOS tube, the gate of which is electrically connected to the transmitting end MKU of the control module MK, the source of which is electrically connected to the positive electrode P + of the cartridge, and the drain of which is electrically connected to the negative electrode P-. When the transmitting end MKU outputs a low voltage, the gate and the source of the P-type MOS tube are connected, so that the drain and the source of the P-type MOS tube are also connected, and when the transmitting end MKU outputs a high voltage, the gate and the source of the P-type MOS tube are disconnected, so that the drain and the source of the P-type MOS tube are also disconnected.
Preferably, an amplifier RX is arranged between the positive electrode P + of the cartridge and the receiving end MKI of the control module MK, and the transmission signal of the main control module ZK is amplified and then transmitted to the control module MK for key verification, so that the accuracy of the signal can be improved, and the key verification can be better performed.
Preferably, a comparator is further disposed between the receiving end of the main control module ZK in the tobacco rod and the positive driving electrode OUT of the tobacco rod, an output end of the comparator is electrically connected with the receiving end ZKI of the main control module ZK, one input end of the comparator inputs a reference voltage, for example, the reference voltage is lower than the battery voltage VDD, and the other input end of the comparator is electrically connected with the positive driving electrode OUT of the tobacco rod. The comparator is arranged for identifying a signal sent by a sending end MKU of the control module MK in the cartridge, so that voltage signals representing 0 and 1 can be effectively distinguished. This is because, when the control module MK in the cartridge sends a signal, the second switching tube is turned on, when the first switching tube is controlled by the signal sent by the sending end MKU, and when the first switching tube is controlled to be turned off, the voltage of the positive driving electrode OUT of the cigarette rod approaches the battery voltage, that is, the voltage is equal to the battery voltage minus the conduction voltage between the source and the drain of the second switching tube, and the conduction voltage is small, so the voltage of the positive driving electrode OUT at this time approaches the battery voltage; when the first switch tube is controlled to be conducted, the voltage of the positive driving electrode OUT of the smoke rod is the divided voltage of the battery voltage at the conduction impedance of the first switch tube, namely the first switch tube and the second switch tube are equivalently connected in series at the moment, and the conduction impedance of the two switch tubes is generally equal or close to each other, so that the voltage of the positive driving electrode OUT is close to one half of the battery voltage at the moment. The reference voltage is therefore preferably set between the battery voltage and half the battery voltage, whereby the two voltages can be clearly distinguished.
In connection with fig. 3. Fig. 3 is a schematic diagram of the principle of the tobacco rod and the tobacco cartridge in the electronic cigarette. When the key is verified and validated by the control module MK, the control module MK sends a signal to the main control module ZK for verification feedback, the P-type MOS tube is connected, the N-type MOS tube is controlled by the sending end MKU of the control module MK, and the signal is sent to the main control module ZK through the positive electrode P + and the positive driving electrode OUT. The voltage of the positive electrode P + of the cartridge before the N-type MOS transistor is not turned on is close to the voltage VDD of the battery BAT, and after the N-type MOS transistor is turned on, since the on-resistance of the N-type MOS transistor is much smaller than the atomizer resistance R1, approximately about 1/10 of the atomizer resistance R1, and the on-resistance of the N-type MOS transistor is close to the on-resistance of the P-type MOS transistor, after the N-type MOS transistor is turned on, the voltage of the positive electrode P + of the cartridge (i.e., the voltage input to the comparator through the positive driving electrode OUT of the cigarette rod) is close to half of the voltage VDD of the battery BAT, specifically depending on the ratio of the on-resistance of the N-type MOS transistor to the on-resistance of the P-type MOS transistor.
Therefore, when the reference voltage is selected, the reference voltage is smaller than the voltage difference of the battery voltage VDD minus the turn-on voltage between the source and the drain of the P-type MOS transistor as the second switching transistor, and the voltage difference is close to VDD because the turn-on voltage is smaller. And the voltage value is larger than the voltage value at the connection part of the drain electrode of the P-type MOS tube and the drain electrode of the N-type MOS tube after the battery voltage passes through the series connection of the conduction impedance between the source electrode and the drain electrode of the P-type MOS tube and the conduction impedance between the source electrode and the drain electrode of the N-type MOS tube of the first switching tube, and the voltage value is preferably VDD/2. In the invention, the battery voltage VDD is 4V, the reference voltage is selected to be VDD-1V which is 3V, so that 4V is larger than 3V obviously, and 2V is smaller than 3V obviously, and signals of high and low voltages can be effectively identified to enter the receiving end of the main control module through the comparator.
Preferably, the cartridge further comprises an internal power supply electrically connected to the positive electrode for supplying power to the control module MK. The internal power supply consists of a diode D1 and a capacitor C1, the positive electrode of the diode D1 is electrically connected with the positive electrode P + of the cartridge, and the negative electrode of the diode D1 is electrically connected with the capacitor C1 and then grounded. When the cigarette rod is correspondingly connected with the cigarette cartridge, the positive driving electrode OUT and the positive electrode P + in the cigarette rod send signals to the control module MK, the capacitor C1 is charged through the diode D1, the capacitor C1 stores electric quantity to supply power to the control module MK in the cigarette cartridge, and one end of the capacitor C1 is electrically connected with the power supply end MKC of the control module MK.
Through this internal power supply, when master control module sent the signal to control module, just can charge this internal power supply through the pulse of sending the signal for supply capacitor C1 supplies power to control module after being charged, therefore the cigarette bullet is inside can not need extra power supply completely, but utilizes communication signal to realize supplying power and information transmission's sharing. Therefore, the main control module can also send a group of pulse signals to the control module to charge the internal power supply, and then send the signals to verify the key.
The key verification here is mainly the identification verification of the key between the controller and the control module of the cigarette rod. Preferably, if the verification is valid and the verification feedback is completed, the first switch tube is normally opened, so that the power supply heating of the atomizer is not affected. If the authentication key is invalid, the second switch tube is normally opened, so that the battery cannot supply power to the cigarette cartridge.
Preferably, for example, the master control module ZK of the cigarette rod reads the key stored therein from the control module MK, and if the key is a key that is normally valid, the master control module ZK identifies the cartridge as a legitimate product. Otherwise, if the key cannot be read, or the read key is an expired key or a repeated key or an incorrect key, the key belongs to an invalid key, the main control module ZK identifies that the cartridge is a counterfeit cartridge, and correspondingly takes control actions, such as controlling to disable the cartridge from being powered on for use, disabling the atomizer therein from being powered on for heating, and the like.
It can also be seen that, in order to implement the key authentication, a signal transmission channel is further established between the control module MK and the main control module ZK after the positive electrode P + of the cartridge is connected to the positive driving electrode OUT of the tobacco rod, that is, an electrical connection channel formed by connecting the positive electrode of the cartridge and the positive driving electrode of the tobacco rod has the function of a signal transmission channel required for key information interaction.
The electrical connection channel formed by connecting the positive electrode P + of the cartridge and the positive driving electrode OUT of the cigarette rod can also be used as a connection channel of an internal power supply of the cartridge, so that the connection interface between the cartridge and the cigarette rod is reused in order to save the electrical connection interface.
The multiplexing belongs to time-sharing multiplexing, namely different functions are realized by using the same interface in different time periods, specifically, by using the interface, after the cigarette rod and the cigarette bullet are connected, firstly, signal transmission is carried out for carrying out key verification, an internal power supply is charged for a short time, and power is supplied to the control module MK. After the verification is valid, the power supply connection is carried out through the interface, and the internal power supply is continuously charged. If the verification is invalid, power cannot be supplied through the interface. Therefore, the interface channel can be used for a signal transmission connection interface of key information and a power supply connection interface, so that the number of interfaces can be saved, the electrical connection mode of the cigarette cartridge and the cigarette rod does not need to be changed, and the purpose of safety and anti-counterfeiting can be realized only by replacing circuits in the cigarette rod and the cigarette cartridge, so that the cost is reduced, and the electronic cigarette is compatible with the existing electronic cigarette product.
Further, based on the same concept and in combination with the foregoing, the present invention further provides a tobacco rod for an electronic cigarette, as shown in fig. 4, the tobacco rod includes a battery BAT, a positive driving electrode OUT, a negative driving electrode GND and a main control module ZK, a second switching tube K2 is disposed between the positive electrode of the battery BAT and the positive driving electrode OUT, the second switching tube K2 is controlled by a transmitting terminal ZKU of the main control module ZK, a receiving terminal ZKI of the main control module ZK is electrically connected to the positive driving electrode OUT, a ground terminal ZKD is electrically connected to the negative driving electrode GND, a power terminal ZKC of the main control module ZK is electrically connected to the positive electrode of the battery BAT, and the negative electrode of the battery is electrically connected to the negative driving electrode GND.
When the main control module ZK sends a verification signal to the outside of the cigarette rod for key verification, the sending end ZKU of the main control module ZK sends a verification signal, the verification signal controls the second switch K2 tube to be switched on or off, and the verification signal is transmitted to the outside of the cigarette rod through the positive driving electrode OUT; when receiving the feedback signal, the second switch tube K2 is turned on, the receiving end ZKI of the main control module ZK receives the feedback signal from the outside of the tobacco rod through the positive driving electrode OUT, and after receiving, the main control module ZK completes verification feedback.
Referring to fig. 5, the second switching tube K2 in the smoke rod is a P-type MOS tube, a gate of the P-type MOS tube is electrically connected to the transmitting end ZKU of the main control module ZK, a source of the P-type MOS tube is electrically connected to the positive electrode of the battery BAT, and a drain of the P-type MOS tube is electrically connected to the positive driving electrode OUT of the smoke rod.
Preferably, a comparator is further disposed between the receiving terminal of the main control module ZK in the tobacco rod and the positive driving electrode OUT of the tobacco rod, an output terminal of the comparator is electrically connected to the receiving terminal ZKI of the main control module ZK, one input terminal of the comparator inputs a reference voltage, for example, the reference voltage is lower than the battery voltage VDD, and the other input terminal of the comparator is electrically connected to the positive driving electrode OUT of the tobacco rod.
The comparator is arranged for identifying a signal sent by a sending end MKU of the control module MK in the cartridge, so that voltage signals representing 0 and 1 can be effectively distinguished. This is because, when the control module MK in the cartridge sends a signal, the second switching tube is turned on, when the first switching tube is controlled by the signal sent by the sending end MKU, and when the first switching tube is controlled to be turned off, the voltage of the positive driving electrode OUT of the cigarette rod approaches the battery voltage, that is, the voltage is equal to the battery voltage minus the conduction voltage between the source and the drain of the second switching tube, and the conduction voltage is small, so the voltage of the positive driving electrode OUT at this time approaches the battery voltage; when the first switch tube is controlled to be conducted, the voltage of the positive driving electrode OUT of the smoke rod is the divided voltage of the battery voltage at the conduction impedance of the first switch tube, namely the second switch tube and the first switch tube are equivalently connected in series at the moment, further, the conduction impedance of the first switch tube is generally equal to or close to the conduction impedance of the second switch tube, and therefore the voltage of the positive driving electrode OUT is close to one half of the battery voltage at the moment. The reference voltage is therefore preferably set between the battery voltage and half the battery voltage, whereby the two voltages can be clearly distinguished.
Further, based on the same concept and in combination with the foregoing. The invention also provides a cartridge for the electronic cigarette, which comprises an atomizer WHQ, a positive electrode P +, a negative electrode P-and a control module MK, wherein two power supply ends of the atomizer WHQ are electrically connected with the positive electrode P + and the negative electrode P-of the cartridge, a first switch tube K1 is further arranged between the positive electrode P + and the negative electrode P-of the cartridge, a receiving end MKI of the control module MK is electrically connected with the positive electrode P + of the cartridge, and a transmitting end MKU of the control module MK controls the first switch tube K1 to be switched on or switched off.
When the control module MK receives a verification signal from the outside of the smoke bomb for key verification, the first switch tube K1 is disconnected, the positive electrode P + receives the verification signal from the outside of the smoke bomb, and after the verification signal is received by a receiving end MKI of the control module MK, the control module MK performs key verification; and after the verification is valid, the sending end MKU of the control module MK sends a feedback signal, the feedback signal controls the first switch tube K1 to be switched on or switched off, and the feedback signal is sent to the outside of the cartridge through the positive electrode P +.
Preferably, referring to fig. 7, the first switch K1 in the cartridge is an N-type MOS transistor, a gate of the N-type MOS transistor is electrically connected to the transmitting end MKU of the control module MK, a source of the N-type MOS transistor is electrically connected to the negative electrode P of the cartridge, and a drain of the N-type MOS transistor is electrically connected to the positive electrode P +.
Preferably, an amplifier is arranged between the positive electrode P + of the cartridge and the receiving end MKI of the control module MK, so that a signal is transmitted to the control module MK after amplification for key verification, and key verification can be performed better.
Preferably, the cartridge further comprises an internal power supply electrically connected to the positive electrode P + for supplying power to the control module MK. The internal power supply consists of a diode D1 and a capacitor C1, the positive electrode of the diode D1 is electrically connected with the positive electrode P + of the cartridge, and the negative electrode of the diode D1 is electrically connected with the capacitor C1 and then grounded. When the cigarette rod is correspondingly connected with the cigarette cartridge, the positive driving electrode OUT and the positive electrode P + in the cigarette rod send signals to the control module MK, the capacitor C1 is charged through the diode D1, the capacitor C1 stores electric quantity to supply power to the control module MK in the cigarette cartridge, and one end of the capacitor C1 is electrically connected with the power supply end MKC of the control module MK.
Through this internal power supply, when master control module sent the signal to control module, just can charge this internal power supply through the pulse of sending the signal for supply capacitor C1 supplies power to control module after being charged, therefore the cigarette bullet is inside can not need extra power supply completely, but utilizes communication signal to realize supplying power and information transmission's sharing. Therefore, the main control module can also send a group of pulse signals to the control module to charge the internal power supply, and then send the signals to verify the key.
Further, based on the same concept and in combination with the foregoing. The invention also provides a key control chip X, which comprises a control module MK, a first switch tube K1, a signal pin I/O and a ground pin GND, wherein the first switch tube K1 comprises two access ends (Kb and Kc) and a controlled end Ka, the two access ends (Kb and Kc) are respectively and electrically connected with the signal pin I/O and the ground pin GND, the controlled end Ka is electrically connected with a sending end MKU of the control module MK, and a receiving end MKI of the control module MK is electrically connected with the signal pin I/O.
When the control chip MK receives a verification signal, the first switch tube K1 is disconnected, a signal pin I/O receives the verification signal from the outside and then inputs the verification signal to the control module MK through a receiving end MKI, after the key control chip carries out key verification, a sending end MKU of the control module MK sends a feedback signal, and the feedback signal controls the first switch tube K1 to be connected or disconnected and sends the feedback signal to the outside through the signal pin I/O.
Preferably, the first switch tube K1 is an N-type MOS tube, a gate of the N-type MOS tube is electrically connected to the transmitting end MKU of the control module MK, a source of the N-type MOS tube is electrically connected to the ground pin GND, and a drain of the N-type MOS tube is electrically connected to the signal pin I/O.
Preferably, an internal power supply electrically connected to the signal pin I/O is further included to supply power to the control module MK. The internal power supply consists of a diode D1 and a capacitor C1, the positive electrode of the diode D1 is electrically connected with the positive electrode P + of the cartridge, and the negative electrode of the diode D1 is electrically connected with the capacitor C1 and then grounded. When the cigarette rod is correspondingly connected with the cigarette cartridge, the positive driving electrode OUT and the positive electrode P + in the cigarette rod send signals to the control module MK, the capacitor C1 is charged through the diode D1, the capacitor C1 stores electric quantity to supply power to the control module MK in the cigarette cartridge, and one end of the capacitor C1 is electrically connected with the power supply end MKC of the control module MK.
Preferably, the internal power source may also be a battery, which directly supplies power to the control module MK.
The key control chip X integrates the control module MK, the first switch tube K1 and the internal power supply in the same chip, so that the key control chip X is used as a whole, can be applied to the cartridges of electronic cigarettes and other scenes needing key verification, and improves the application range of the chip.
Through the mode, the invention discloses an electronic cigarette, a cigarette rod for the electronic cigarette, a cigarette cartridge and a key control chip. After the cigarette rod is correspondingly connected with the cigarette cartridge, the main control module sends a signal to the control module for key verification, the first switch tube is disconnected, the second switch tube is controlled by the sending end of the main control module to send a signal to the control module through the positive driving electrode and the positive electrode, and the control module performs key verification after the signal is received by the receiving end of the control module; after the verification is effective, the control module sends a signal to the main control module for verification feedback, the second switch tube is switched on, the first switch tube is controlled by the sending end of the control module, the signal is sent to the main control module through the positive electrode and the positive driving electrode, and after the signal is received by the receiving end of the main control module, the main control module completes the key verification. Counterfeit and shoddy smoke cartridges are prevented through key verification, the structure is simple, and the electronic cigarette is compatible with the existing electronic cigarette.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.

Claims (14)

1. An electronic cigarette comprises a cigarette rod and a cigarette cartridge, and is characterized in that the cigarette rod comprises a battery, a positive driving electrode, a negative driving electrode and a main control module, a second switch tube is arranged between the positive electrode of the battery and the positive driving electrode, the on-off of the second switch tube is controlled by the sending end of the main control module, the receiving end of the main control module is electrically connected with the positive driving electrode, the grounding end of the main control module is electrically connected with the negative driving electrode, and the negative electrode of the battery is electrically connected with the negative driving electrode;
the smoke cartridge comprises a positive electrode, a negative electrode and a control module, a first switch tube is further arranged between the positive electrode and the negative electrode of the smoke cartridge, a receiving end of the control module is electrically connected with the positive electrode of the smoke cartridge, and a sending end of the control module controls the first switch tube to be connected or disconnected;
when the tobacco rod is correspondingly connected with the cigarette cartridge for use, the positive driving electrode and the negative driving electrode of the tobacco rod are correspondingly and respectively electrically connected with the positive electrode and the negative electrode of the cigarette cartridge;
after the cigarette rod is correspondingly connected with the cigarette cartridge, the first switch tube is disconnected, the sending end of the main control module sends out a verification signal, the verification signal controls the second switch tube to be switched on or off, the verification signal is transmitted to the control module through the positive driving electrode and the positive electrode, and after the verification signal is received by the receiving end of the control module, the control module carries out key verification; after the verification is effective, the control module carries out verification feedback on the main control module, the second switch tube is connected, the sending end of the control module sends a feedback signal, the feedback signal controls the first switch tube to be connected or disconnected, the feedback signal is transmitted to the main control module through the positive electrode and the positive driving electrode, and the verification feedback is completed after the feedback signal is received by the receiving end of the main control module.
2. The electronic cigarette of claim 1, wherein the second switch tube in the cigarette rod is a P-type MOS tube or an N-type MOS tube.
3. The electronic cigarette of claim 2, wherein the first switch in the cartridge is an N-type MOS transistor or a P-type MOS transistor.
4. The electronic cigarette according to claim 3, wherein a comparator is further disposed between the receiving end of the main control module in the cigarette rod and the positive driving electrode of the cigarette rod, an output end of the comparator is electrically connected to the receiving end of the main control module, one input end of the comparator inputs a reference voltage, and the other input end of the comparator is electrically connected to the positive driving electrode of the cigarette rod.
5. The electronic cigarette of any of claims 1-4, further comprising an internal power source electrically connected to the positive electrode in the cartridge for providing power to the control module.
6. A tobacco rod for an electronic cigarette is characterized by comprising a battery, a positive driving electrode, a negative driving electrode and a main control module, wherein a second switch tube is arranged between the positive electrode of the battery and the positive driving electrode, the on-off of the second switch tube is controlled by the sending end of the main control module, the receiving end of the main control module is electrically connected with the positive driving electrode, and the grounding end of the main control module is electrically connected with the negative driving electrode;
when the main control module sends a verification signal to the outside of the cigarette rod for key verification, the sending end of the main control module sends a verification signal, the verification signal controls the second switching tube to be switched on or off, and the verification signal is transmitted to the outside of the cigarette rod through the positive driving electrode; when receiving the feedback signal, the second switch tube is switched on, the receiving end of the main control module receives the feedback signal from the outside of the tobacco rod through the positive driving electrode, and after receiving, the main control module completes verification feedback.
7. The tobacco rod for the electronic cigarette according to claim 6, wherein the second switch tube in the tobacco rod is a P-type MOS tube or an N-type MOS tube.
8. The tobacco rod for the electronic cigarette according to claim 7, wherein a comparator is further arranged between the receiving end of the main control module in the tobacco rod and the positive driving electrode of the tobacco rod, the output end of the comparator is electrically connected with the receiving end of the main control module, one input end of the comparator inputs a reference voltage, and the other input end of the comparator is electrically connected with the positive driving electrode of the tobacco rod.
9. A cartridge for an electronic cigarette is characterized by comprising a positive electrode, a negative electrode and a control module, wherein a first switch tube is arranged between the positive electrode and the negative electrode of the cartridge;
when the control module receives a verification signal from the outside of the cigarette cartridge to perform key verification, the first switch tube is disconnected, the positive electrode receives the verification signal from the outside of the cigarette cartridge, and the control module performs key verification after the verification signal is received by the receiving end of the control module; and after the verification is valid, the sending end of the control module sends a feedback signal, the feedback signal controls the first switching tube to be switched on or off, and the feedback signal is sent to the outside of the smoke cartridge through the positive electrode.
10. The cartridge of claim 9, wherein the first switch in the cartridge is an N-type MOS transistor or a P-type MOS transistor.
11. The cartridge of claim 10, further comprising an internal power source electrically connected to the positive electrode for providing power to the control module.
12. A key control chip is characterized by comprising a control module, a first switch tube, a signal pin and a grounding pin, wherein the first switch tube comprises two access ends and a controlled end, the two access ends are respectively and electrically connected with the signal pin and the grounding pin, the controlled end is electrically connected with a sending end of the control module, and a receiving end of the control module is electrically connected with the signal pin;
when the control chip receives the verification signal, the first switch tube is disconnected, the signal pin receives the verification signal from the outside and then inputs the verification signal to the control module through the receiving end, after the key control chip performs key verification, the sending end of the control module sends a feedback signal, and the feedback signal controls the first switch tube to be switched on or switched off and sends the feedback signal to the outside through the signal pin.
13. The key control chip of claim 12, wherein the first switch transistor is an N-type MOS transistor or a P-type MOS transistor.
14. The key control chip of claim 12, further comprising an internal power supply electrically connected to the signal pin for supplying power to the control module.
CN202011453217.XA 2020-10-09 2020-12-11 Electronic cigarette, tobacco stem for electronic cigarette, tobacco cartridge and key control chip Active CN112471604B (en)

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