CN112056626A

CN112056626A - Electronic cigarette, and cigarette cartridge and safety circuit used for electronic cigarette

Info

Publication number: CN112056626A
Application number: CN202011074488.4A
Authority: CN
Inventors: 宋利军; 肖春兰
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2020-12-11
Anticipated expiration: 2040-10-09
Also published as: CN112056626B

Abstract

The invention discloses an electronic cigarette, a cartridge and a safety circuit for the electronic cigarette. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode; when the cigarette rod is connected with the cigarette cartridge, the positive and negative driving electrodes are randomly and electrically connected with the first and second electrodes; a transmission channel formed by connecting the first or second electrode of the cigarette cartridge with the positive driving electrode of the cigarette rod, and a controller in the cigarette rod and a control module in the cigarette cartridge transmit signals to carry out key verification; the verification is effective, the control module controls two power supply ends of an atomizer in the cartridge to be respectively connected with the first electrode and the second electrode, the verification is ineffective, and the control module controls the two power supply ends of the atomizer to be respectively disconnected with the first electrode and the second electrode. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette cartridge in the mode, the signal transmission and the power supply are realized by multiplexing the same interface, and therefore counterfeit and shoddy cigarette cartridges are prevented.

Description

Electronic cigarette, and cigarette cartridge and safety circuit used for electronic cigarette

Technical Field

The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette, a cigarette cartridge and a safety circuit for the electronic cigarette.

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 that the cigarette bullet is anti-fake, increased the information communication interface between cigarette bullet and the tobacco rod in the electrical interface, generally including power connection end, ground connection link, signal connection end etc. carry out mutual authentication through this kind of information communication interface 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 smoke cartridge and the smoke rod, the interface comprises a plurality of connecting ends, the electrical connection mode between the existing smoke cartridge and the smoke rod is changed, the hardware cost of the interface is increased, the physical structures of the smoke cartridge and the smoke rod are changed and become complex, the damage rate of the smoke cartridge and the smoke rod is increased when the smoke cartridge and the smoke rod are connected in an inserting mode, the universality is not strong, and the satisfaction degree of user consumption experience is reduced.

In addition, when the cigarette cartridge and the cigarette rod of the electronic cigarette are connected, two electrodes of the cigarette cartridge can be divided into two situations of distinguishing the polarity of the power supply and not distinguishing the polarity of the power supply, and the two situations need to be distinguished.

Disclosure of Invention

The invention mainly solves the technical problems of providing an electronic cigarette, a cartridge and a safety circuit for the electronic cigarette, and solving the technical means problems that the cartridge and a cigarette rod of the electronic cigarette in the prior art are lack of low cost, the interconnection structure between the cartridge and the cigarette rod is not changed, and mutual safety authentication can be carried out to prevent counterfeit products.

In order to solve the technical problem, the invention provides an electronic cigarette, which comprises a cigarette rod and a cigarette cartridge, wherein the cigarette rod comprises a positive driving electrode and a negative driving electrode, the cigarette cartridge comprises an atomizer, a first electrode, a second electrode and a safety circuit, and the safety circuit comprises a control module; when the cigarette rod is correspondingly connected with the cigarette cartridge for use, the positive drive electrode and the negative drive electrode of the cigarette rod are correspondingly and respectively in electrical contact connection with the first electrode and the second electrode of the cigarette cartridge, or are correspondingly and respectively in electrical contact connection with the second electrode and the first electrode of the cigarette cartridge; after the cigarette rod is correspondingly connected with the cigarette cartridge, a transmission channel is formed by connecting a first electrode or a second electrode of the cigarette cartridge with a positive driving electrode of the cigarette rod, and a controller in the cigarette rod and a control module in the cigarette cartridge transmit signals to carry out key verification; the key verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected.

Preferably, the safety circuit comprises a polarity conversion circuit, the polarity conversion circuit comprises a first conversion input end and a second conversion input end, the first conversion input end is correspondingly connected with the first electrode or the second electrode, and the second conversion input end is correspondingly connected with the second electrode or the first electrode; the two switching output ends of the polarity switching circuit are respectively a positive switching output end and a negative switching output end.

Preferably, the polarity conversion circuit comprises a first P-type MOS transistor, a second P-type MOS transistor, a first N-type MOS transistor, and a second N-type MOS transistor; the grid electrode of the first P-type MOS tube is electrically connected with the grid electrode of the first N-type MOS tube and serves as a first grid electrode connection point; the grid electrode of the second P-type MOS tube is electrically connected with the grid electrode of the second N-type MOS tube and serves as a second grid electrode connection point; the source electrode of the first P-type MOS tube is electrically connected with the drain electrode of the first N-type MOS tube and serves as a first drain electrode connection point; the source electrode of the second P-type MOS tube is electrically connected with the drain electrode of the second N-type MOS tube and serves as a second drain electrode connection point; the drain electrode of the first P-type MOS tube is electrically connected with the drain electrode of the second P-type MOS tube and is used as the anode conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as the negative pole conversion output end of the polarity conversion circuit; the first switching input terminal is electrically connected to the first drain connection point and the second gate connection point, and the second switching input terminal is electrically connected to the second drain connection point and the first gate connection point.

Preferably, the safety circuit further comprises a first switch tube, a first pin of the first switch tube is electrically connected with the negative electrode conversion output end of the polarity conversion circuit, a second pin of the first switch tube is electrically connected with the first power supply end of the atomizer, a control pin of the first switch tube is electrically connected with the control end of the control module, and a second power supply end of the atomizer is electrically connected with the positive electrode conversion output end; a control end of the control module outputs a switching-on control signal, so that a first pin and a second pin of the first switching tube are switched on, and power supply loops of two power supply ends of the atomizer are switched on; and the control end of the control module outputs a disconnection control signal, so that the first pin and the second pin of the first switching tube are disconnected, and the power supply loops of the two power supply ends of the atomizer are disconnected.

Preferably, the safety circuit further comprises an internal power supply electrically connected to the positive switching output terminal of the polarity switching circuit, for supplying power to the safety circuit.

Preferably, the control module comprises a signal receiving and sending unit, a security algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is electrically connected with the first electrode and the second electrode and is used for signal transmission with a controller in the cigarette rod, the safety algorithm engine unit is used for carrying out key verification on information content from the controller in the cigarette rod and correspondingly generating an on control signal or an off control signal to cause the verification state latch unit, and the verification state latch unit latches the on control signal or the off control signal generated and output by the safety algorithm engine unit and outputs a control signal for controlling the power supply circuit of the atomizer to be switched on or switched off.

Preferably, the inside of the cigarette rod further comprises a battery, a second switch tube and an atomization driver, the atomization driver is used for driving and controlling power supply of an atomizer in the cigarette cartridge, and the controller is also electrically connected with the positive driving electrode; the negative driving electrode is electrically connected with the negative electrode of the battery, the positive driving electrode is electrically connected with the second pin of the second switching tube, the positive electrode of the battery is electrically connected with the first pin of the second switching tube, and the control pin of the second switching tube is electrically connected with the control pin of the atomization driver; if the key is verified to be valid, the controller of the cigarette rod controls the atomization driver to output a valid enabling signal to the second switch tube, a second pin of the second switch tube is connected with the first pin, and then the anode of the battery is connected with a second power supply end of the atomizer, and the control module in the cigarette bullet also controls to enable two power supply ends of the atomizer to be respectively connected with the first electrode and the second electrode; and if the key verification is invalid, the controller of the cigarette rod controls the atomization driver to output an invalid enabling signal to the second switch tube, the second pin of the second switch tube is disconnected with the first pin, the anode of the battery is disconnected with the second power supply end of the atomizer, and the control module in the cigarette bullet also controls the two power supply ends of the atomizer to be respectively disconnected with the first electrode and the second electrode.

The invention also provides a cartridge for an electronic cigarette, the cartridge comprising an atomizer, the cartridge further comprising a first electrode, a second electrode and a safety circuit, the safety circuit comprising a control module; the control module transmits signals to the outside through the first electrode or the second electrode and performs key verification; the key verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected.

Preferably, the control module comprises a signal receiving and sending unit, a security algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is electrically connected with the first electrode and the second electrode and used for carrying out signal transmission externally, the safety algorithm engine unit is used for verifying a secret key and correspondingly generates a connection control signal or a disconnection control signal to cause the verification state latch unit, and the verification state latch unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit and outputs a signal for controlling the connection or the disconnection of a power supply loop of the atomizer.

The invention also provides a safety circuit, which comprises a first switch tube and a control module, wherein the control module performs key verification on an external transmission signal; the key is verified to be valid, and the control module controls the first switch tube to be conducted; and if the key verification is invalid, the control module controls the first switching tube to be disconnected.

Preferably, the safety circuit comprises a polarity conversion circuit, the polarity conversion circuit comprises a first conversion input end and a second conversion input end, and two conversion output ends of the polarity conversion circuit are respectively a positive conversion output end and a negative conversion output end; the control pin of the first switch tube is electrically connected with the control end of the control module, the control end of the control module outputs a switch-on control signal, so that the first pin of the first switch tube is connected with the second pin, and the control end of the control module outputs a switch-off control signal, so that the first pin of the first switch tube is disconnected with the second pin.

Preferably, the control module comprises a signal receiving and sending unit, a security algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is used for transmitting signals to the outside, the security algorithm engine unit is used for verifying keys and correspondingly generates a connection control signal or a disconnection control signal to cause the verification state latch unit, and the verification state latch unit latches the connection control signal or the disconnection control signal output by the security algorithm engine unit.

The invention has the technical effects that: the invention discloses an electronic cigarette, a cartridge for the electronic cigarette and a safety circuit. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode which do not distinguish the positive polarity and the negative polarity of the electrodes; when the cigarette rod is connected with the cigarette cartridge, the positive and negative driving electrodes are randomly and electrically connected with the first and second electrodes; a transmission channel formed by connecting the first or second electrode of the cigarette cartridge with the positive driving electrode of the cigarette rod, and a controller in the cigarette rod and a control module in the cigarette cartridge transmit signals to carry out key verification; the verification is effective, the control module controls the power supply circuits of the two power supply ends of the atomizer in the smoke cartridge to be connected, the verification is ineffective, and the control module controls the power supply circuits of the two power supply ends of the atomizer to be disconnected. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette cartridge in the mode, the signal transmission and the power supply are realized by multiplexing the same interface, and therefore counterfeit and shoddy cigarette cartridges are prevented.

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 an embodiment of a tobacco rod in an electronic cigarette according to the invention;

figure 3 is a schematic diagram of the composition of an embodiment of a cartridge in an electronic cigarette according to the invention;

figure 4 is a schematic diagram of the components of a signal receiving and transmitting unit in an embodiment of a cartridge of an electronic cigarette according to the invention;

figure 5 is a schematic diagram of a polarity switching circuit in an embodiment of a cartridge of an electronic cigarette 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 present invention discloses an electronic cigarette, comprising a cigarette rod and a cigarette cartridge, wherein the cigarette rod comprises a positive driving electrode YG1 and a negative driving electrode YG2, the cigarette cartridge comprises a nebulizer YD3, a first electrode YD1, a second electrode YD2 and a safety circuit, and the safety circuit comprises a control module AD 2; when the cigarette rod is correspondingly connected with a cigarette bullet for use, the positive drive electrode YG1 and the negative drive electrode YG2 of the cigarette rod are correspondingly and respectively in electrical contact connection with the first electrode YD1 and the second electrode YD2 of the cigarette bullet, or are correspondingly and respectively in electrical contact connection with the second electrode YD2 and the first electrode YD1 of the cigarette bullet; after the cigarette rod is correspondingly connected with the cigarette cartridge, a transmission channel is formed by connecting a first electrode YD1 or a second electrode YD2 of the cigarette cartridge with a positive driving electrode YG1 of the cigarette rod, and a controller YG3 in the cigarette rod and a control module AD2 in the cigarette cartridge transmit signals to carry out key verification; the key verification is valid, the control module AD2 controls the power supply circuit of the atomizer YD3 to be switched on, the key verification is invalid, and the control module AD2 controls the power supply circuit of the atomizer YD3 to be switched off.

Here, the power supply circuit of the atomizer YD3 is an electrical connection path between the two power supply terminals of the atomizer YD3 and the positive and negative poles of the power supply, and when the power is supplied to the two power supply terminals of the atomizer YD3, it is necessary to connect the two power supply terminals to the first electrode YD1 and the second electrode YD2, respectively, and thus the power supply circuit is connected to supply power. When the power supply is cut off, at least one power supply end is required to be cut off.

Further, in fig. 1, the safety circuit includes a polarity conversion circuit AD1, the polarity conversion circuit AD1 is disposed between the first electrode YD1 and the second electrode YD2 and the control module AD2 and the atomizer YD3, the polarity conversion circuit AD1 includes a first conversion input end AD11 and a second conversion input end AD12, the first conversion input end AD11 is correspondingly connected to the first electrode or the second electrode, and the second conversion input end AD12 is correspondingly connected to the second electrode or the first electrode. Here, since the first electrode and the second electrode are not distinguished in positive and negative polarities when connected to the outside, the two conversion input terminals of the polarity conversion circuit may be connected to the external power supply at random without distinguishing the positive and negative polarities. The two conversion output ends of the polarity conversion circuit have positive and negative polarity, and the two conversion output ends of the polarity conversion circuit are respectively a positive conversion output end AD13 and a negative conversion output end AD 14.

Further, as shown in fig. 1, the safety circuit further includes a first switch tube AD3, a first pin of the first switch tube AD3 is electrically connected to a negative conversion output end AD14 of the polarity conversion circuit AD1, a second pin of the first switch tube AD3 is electrically connected to a first power supply end of the atomizer YD3, a control pin of the first switch tube AD3 is electrically connected to a control end of the control module AD2, and a second power supply end of the atomizer YD3 is electrically connected to a positive conversion output end AD 13; a control end of the control module AD2 outputs a switch-on control signal, so that a first pin and a second pin of the first switching tube AD3 are connected, and power supply loops of two power supply ends of the atomizer YD3 are connected; when the control end of the control module AD2 outputs a disconnection control signal, the first pin and the second pin of the first switching tube AD3 are disconnected, and the power supply loops of the two power supply ends of the atomizer YD3 are disconnected.

In fig. 1, only one arrangement of the atomizer and the first switch tube is shown, and there is another equivalent arrangement, and the two have equivalent technical effects, that is: the safety circuit further comprises a first switch tube AD3, a first pin of the first switch tube AD3 is electrically connected with a positive electrode conversion output end AD13 of a polarity conversion circuit AD1, a second pin of the first switch tube AD3 is electrically connected with a second power supply end of the atomizer YD3, a control pin of the first switch tube AD3 is electrically connected with a control end of the control module AD2, and a first power supply end of the atomizer YD3 is electrically connected with a negative electrode conversion output end AD 14; a control end of the control module AD2 outputs a switch-on control signal, so that a first pin and a second pin of the first switching tube AD3 are connected, and power supply loops of two power supply ends of the atomizer YD3 are connected; when the control end of the control module AD2 outputs a disconnection control signal, the first pin and the second pin of the first switching tube AD3 are disconnected, and the power supply loops of the two power supply ends of the atomizer YD3 are disconnected.

It can be seen that the difference between the two modes is that the first switching tube AD1 controls the first power supply terminal of the atomizer YD3 to be switched on or off, and controls the second power supply terminal of the atomizer YD3 to be switched on or off, and the two modes are equivalent, and both modes control the power supply circuit of the atomizer YD3 to be switched on or off. And the two power supply ends are not distinguished by positive and negative electric polarities, so that the two power supply ends are respectively correspondingly connected with a positive electrode and a negative electrode, or connected with the negative electrode and the positive electrode.

It should be noted that the first electrode and the second electrode do not distinguish between positive and negative polarities of the electrodes, and when the first electrode and the second electrode are correspondingly connected to the positive driving electrode and the negative driving electrode, there are two cases, where the first electrode may be connected to the positive driving electrode, and the second electrode may be connected to the negative driving electrode, or the first electrode may be connected to the negative driving electrode, and the second electrode may be connected to the positive driving electrode. Therefore, when the cigarette bullet is connected with the cigarette rod, the polarities of the power supplies correspondingly connected with the first electrode and the second electrode do not need to be distinguished. The safety and compatibility of the cartridge use will thus be higher.

Preferably, the key verification is valid, the control module controls the two power supply ends of the atomizer to be respectively connected with the first electrode and the second electrode, and the connected state is kept by the latch; the key verification is invalid, the control module controls the two power supply ends of the atomizer to be disconnected from the first electrode and the second electrode respectively, and the disconnected state is kept by being latched. After the cigarette is kept by latching, because the cigarette cartridge is connected with the cigarette rod, when the cigarette is verified to be effective by the secret key, the cigarette can be always in the latch connection state, so that the connection state can be kept without the need of a safety circuit for supplying power all the time, and the saving of power consumption of the safety circuit is facilitated.

The key verification here is mainly the identification verification of the key between the controller and the control module of the cigarette rod.

Preferably, the first way of key verification is that the controller sends a key to the control module, and only one-way sending is needed, the control module performs resolution verification after receiving the key, and the result of resolution verification includes that the key verification is valid or invalid. The method can further comprise the step that the control module feeds back the result of the resolving verification to the controller, or the feedback is not needed, so that the controller only needs to transmit the key to the control module by carrying out one-way communication signal transmission.

Preferably, the second way of the key verification is that the control module sends a key to the controller, the controller performs calculation verification after receiving the key, the result of the calculation verification includes that the key is valid or invalid, then the controller feeds back the result of the calculation verification to the control module, and the control module performs the above-mentioned on-off control on the two power supply terminals of the atomizer after receiving the result of the calculation verification.

Preferably, for example, the controller of the cigarette rod reads the key stored therein from the control module and if the key is of a normally valid nature, the controller will identify the cartridge as a legitimate and qualified product. Otherwise, if the key cannot be read, or the read key is an expired key, a repeated key or an incorrect key, and the key belongs to an invalid key, the controller will recognize that the cartridge is a counterfeit cartridge, and correspondingly take control actions, such as controlling to make the cartridge not normally used, and not supplying power and heating to the atomizer therein. If the key is valid, the controller transmits the valid identification result to the control module through a signal, and the control module correspondingly generates an output connection control signal after receiving the valid identification result; if the key is invalid, the controller transmits an invalid identification result to the control module through a signal, the control module correspondingly generates an output disconnection control signal after receiving the invalid identification result, or the control module cannot obtain a feedback signal of the controller within a specified time range, and the control module also correspondingly generates an output disconnection control signal if the control module does not perform valid key verification. Therefore, mutual authentication between the cartridge and the cigarette rod can be realized in this way, and the adaptive use between the cartridge and the cigarette rod is ensured.

It can also be seen that, in order to implement the key authentication, a signal transmission channel is further established between the control module and the controller after the first electrode or the second electrode of the cartridge is connected to the positive driving electrode of the tobacco rod, that is, an electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge to the positive driving electrode of the tobacco rod has a function of a signal transmission channel required for key information interaction, and the electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge to the positive driving electrode of the tobacco rod is mainly used as a connection channel of a power supply, so that in order to save an electrical connection interface, the connection interface of the power supply is reused, and the reuse belongs to time division multiplexing, that is, different functions are implemented by using the same interface in different time periods, specifically, by using the interface, after the cigarette rod and the cigarette cartridge are connected, firstly, signal transmission is carried out to carry out key verification, after the verification is valid, power supply connection is carried out through the interface, and if the verification is invalid, power supply can not be carried out 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, the aim of safety and anti-counterfeiting can be achieved only by improving the circuit in the cigarette rod and the cigarette cartridge, the cost is reduced, and the existing electronic cigarette product is compatible.

Preferably, as shown in fig. 2, the cigarette rod further includes a battery YG4, a fog driver YG5, and a second switch tube YG6, wherein a positive electrode YG41 of the battery YG4 is electrically connected to the first pin YG61 of the second switch tube YG6, the positive driving electrode YG1 is electrically connected to the second pin YG62 of the second switch tube YG6, a control pin of the second switch tube YG6 is electrically connected to the output pin of the fog driver YG5, a negative electrode YG42 of the battery YG4 is electrically connected to the negative driving electrode YG2, and the controller YG3 is also electrically connected to the fog driver YG5 and the positive driving electrode YG1, respectively. Further, after the cigarette rod is connected to the cigarette cartridge, the controller YG3 of the cigarette rod is connected to the first electrode through the positive driving electrode YG1, or connected to the second electrode through the positive driving electrode YG1, and sends and receives signals to and from the control module to perform key verification, and the key verification is valid, then the controller YG3 of the cigarette rod controls the fog driver YG5 to output a valid enable signal to the second switching tube YG6, the first pin YG61 and the second pin YG62 of the second switching tube YG6 are connected, and the battery YG4 supplies power to two ends of the fog; if the key verification is invalid, the controller YG3 of the cigarette rod controls the fog driver YG5 to output an invalid enable signal to the second switch tube YG6, the first pin YG61 of the second switch tube YG6 is disconnected from the second pin YG62, and the battery YG4 is disconnected to supply power to the two ends of the fog device.

Preferably, in fig. 2, the cigarette smoking device further includes a suction detector YG7, when the cigarette rod and the cigarette cartridge are connected and the key verification is valid, the double MOS transistor in the cigarette cartridge is always in a closed state, and the second switch tube only controls the fog driver YG5 to output a valid enable signal to the second switch tube YG6 after the suction detector YG7 detects the suction force generated by the cigarette cartridge being smoked, the first pin YG61 of the second switch tube YG6 is connected to the second pin YG62, and the battery YG4 supplies power to both ends of the fog device. When the YG7 detects that the cartridge is not smoked and is not generated, the atomization driver YG5 is controlled to output an invalid enable signal to the second switch tube YG6, the first pin YG61 of the second switch tube YG6 is disconnected from the second pin YG62, and the battery YG4 cannot supply power to the two ends of the atomizer. It can be seen that the power supply from the battery to the atomizer is only performed when the cartridge is smoked, and the two pins of the second switch tube YG6 are disconnected when the cartridge is not smoked, so that the atomizer cannot be powered.

Further, on the basis of fig. 1, fig. 3 shows the detailed composition of the safety circuit in the cartridge. Wherein the same parts as shown in fig. 1 are not described again.

In fig. 3, the security circuit includes a signal receiving and transmitting unit AD21, a security algorithm engine unit AD22, and a verification state latch unit AD 23. These units may be considered as internal constituent units of the control module AD 2.

Specifically, the signal receiving and transmitting unit AD21 is electrically connected with the first electrode and the second electrode, so that bidirectional communication with the controller in the cigarette rod, that is, transmission and reception of signals can be realized.

And the safety algorithm engine unit AD22 is used for analyzing the information content from the controller in the tobacco rod, and correspondingly sending a key to the controller after the analysis conforms to the agreement of both parties, so that the controller can identify the key of the engine unit.

Furthermore, when the controller analyzes the identification key correctly, a valid command is sent to the engine unit, the engine unit generates a switch-on control signal, otherwise, if the controller analyzes the identification key incorrectly, an invalid command is sent to the engine unit, and the controller generates a switch-off control signal.

The verification state latch unit AD23 latches the on control signal or the off control signal generated and output by the engine unit, so as to keep the control state unchanged, and outputs the control signal to the first switch tube AD3 to control the on or off of the first switch tube AD 3.

Preferably, in fig. 3, the first switching transistor AD3 is an N-type MOS transistor, the gate of the N-type MOS transistor is controlled by the control signal output by the gate subject authentication state latch unit AD23, the source is connected to the negative conversion output terminal AD14 and grounded, the N-type MOS transistor is turned on when the control signal is positive voltage, the N-type MOS transistor is turned off when the control signal is 0 voltage (i.e., grounded), the drain is electrically connected to one power supply terminal of the atomizer YD3, and the other power supply terminal of the atomizer YD3 is connected to the positive conversion output terminal AD 13. Preferably, the first switching transistor AD1 may be a P-type MOS transistor, the source of the P-type MOS transistor is controlled by a control signal output by the gate subject verification state latch unit, the negative conversion output terminal AD14 is connected to the ground, the P-type MOS transistor is turned on when the control signal is a negative voltage, the P-type MOS transistor is turned off when the control signal is a 0 voltage (i.e., the control signal is grounded), the drain of the P-type MOS transistor is electrically connected to one power supply terminal of the atomizer YD3, and the other power supply terminal of the atomizer YD3 is connected to the positive conversion output terminal AD 13.

Preferably, as shown in fig. 3, the safety circuit further includes an internal power supply electrically connected to the positive conversion output terminal AD13 for supplying power to the safety circuit, and the internal power supply AD4 draws power from the positive conversion output terminal AD13 from the outside, and the power drawing manner includes that when a communication signal from the outside, such as a digital pulse communication signal, is provided at the positive conversion output terminal AD13, power can be supplied from the communication signal, or power can be supplied from the positive electrode of the battery after an external battery is connected to the positive conversion output terminal AD13 for supplying dc power. That is to say, both the communication signal power supply and the external battery power supply can be used as the external power supply AD4 to take power from the outside, and the power taking sources are based on the same positive conversion output end AD 13.

Preferably, the circuit of the internal power supply comprises a diode AD41 and a capacitor AD42 electrically connected to the positive conversion output terminal AD13, the positive electrode of the diode AD41 is connected to the positive conversion output terminal AD13, the negative electrode of the diode AD41 is connected to the capacitor AD42, and the other end of the capacitor AD42 is grounded. When the positive conversion output terminal AD13 inputs a digital pulse signal, the diode AD41 is turned on when the digital pulse signal is a positive voltage signal, and the capacitor AD42 is charged, so that a power supply voltage can be generated at the connection between the negative electrode of the diode AD41 and the capacitor AD42, and the power supply voltage is used as a power supply of a safety circuit.

In fig. 3, the signal receiving and transmitting unit AD21 is electrically connected to both the first electrode YD1 and the second electrode YD2, whereby signals can be transmitted and received through bidirectional communication between the first electrode YD1 or the second electrode YD2 and the controller in the tobacco rod, respectively.

Further, referring to fig. 4, the communication interface of the signal receiving and transmitting unit includes a first communication interface Tj1 and a second communication interface Tj2, both of which have the same circuit composition and include four connection ports, taking the first communication interface Tj1 as an example, i.e. a positive input port Tj11, a negative input port Tj12, a receiving output port Tj13 and a transmitting output port Tj14, and internally includes a first receiving amplifier Tj15, a first transmitting N-type MOS transistor Tj16 and a second transmitting N-type MOS transistor Tj17, an input terminal of the first receiving amplifier Tj15 is electrically connected to a source of the first transmitting N-type MOS transistor Tj16, and the electrical connection point serves as the positive input port Tj11, an output terminal of the first receiving amplifier Tj15 serves as the receiving output port Tj13, a drain of the first transmitting N-type MOS transistor Tj16 is electrically connected to a drain of the second transmitting N-type MOS transistor Tj17, a gate of the second transmitting N16 is electrically connected to a transmitting gate of the second transmitting N-type MOS transistor Tj17, the junction is used as a transmitting output port Tj14, and the source of the second transmitting N-type MOS transistor Tj17 is used as a negative input port Tj 12. Further, a positive input port Tj11 of the first communication interface is electrically connected to the first electrode YD1, a negative input port Tj12 of the first communication interface is electrically connected to the second electrode YD2, and the receiving output port Tj13 and the sending output port Tj14 are respectively connected to a communication control interface module Tj3, which is used for controlling bidirectional communication and receiving and sending communication signals. The positive input port Tj21 of the second communication interface Tj2 is electrically connected with the second electrode YD2, the negative input port Tj22 of the second communication interface Tj2 is electrically connected with the first electrode YD1, and the receiving output port Tj23 and the sending output port Tj24 are respectively connected to the communication control interface module Tj 3. Since the internal components of the second communication interface Tj2 and the first communication interface Tj1 are the same, the respective components in the second communication interface Tj2 are not described in detail.

It can be seen that, through the two communication interfaces, whether the first electrode is connected with an external positive voltage (corresponding to the second electrode being connected with an external negative voltage or grounded), or the second electrode is connected with an external positive voltage (corresponding to the first electrode being connected with an external negative voltage or grounded), one of the communication interfaces can be enabled to work normally, while the other communication interface is out of service and does not affect the working communication interface.

Further, referring to fig. 3, the polarity switching circuit specifically includes, in fig. 5, a P-type MOS transistor P1, a second P-type MOS transistor P2, a first N-type MOS transistor N1, and a second N-type MOS transistor N2; the grid electrode of the first P-type MOS transistor P1 is electrically connected with the grid electrode of the first N-type MOS transistor N1 to be used as a first grid electrode connection point G1; the grid electrode of the second P-type MOS tube P2 is electrically connected with the grid electrode of the second N-type MOS tube N2 and serves as a second grid electrode connection point G2; the source electrode of the first P-type MOS transistor P1 is electrically connected with the drain electrode of the first N-type MOS transistor N1 to serve as a first drain electrode connection point D1; the source electrode of the second P-type MOS transistor P2 is electrically connected with the drain electrode of the second N-type MOS transistor N2 and serves as a second drain electrode connection point D2; the drain electrode of the first P-type MOS transistor P1 is electrically connected with the drain electrode of the second P-type MOS transistor P2 and is used as the anode conversion output end AD13 of the polarity conversion circuit; the source electrode of the first N-type MOS tube N1 is electrically connected with the source electrode of the second N-type MOS tube N2 and is used as a negative pole conversion output end AD14 of the polarity conversion circuit; the first conversion input terminal AD11 is electrically connected to the first drain connection point D1 and the second gate connection point G2, and the second conversion input terminal AD12 is electrically connected to the second drain connection point D2 and the first gate connection point G1.

It can be seen that when a positive voltage is input at the first conversion input terminal AD11, the second conversion input terminal AD12 is grounded, and a negative pressure difference is formed between the gate and the source of the first P-type MOS transistor P1, so that the drain and the source of the first P-type MOS transistor P1 are turned on, the positive voltage input through the first conversion input terminal AD11 reaches the positive conversion output terminal AD13 of the polarity conversion circuit, and the drain and the source of the first N-type MOS transistor N1 are turned off; meanwhile, the drain and the source of the second P-type MOS transistor P2 are turned off, the drain and the source of the second N-type MOS transistor N2 are turned on, and the second conversion input terminal AD12 is grounded, so that the negative conversion output terminal AD14 of the polarity conversion circuit is grounded. When the first conversion input end AD11 is grounded, the second conversion input end AD12 inputs a positive voltage, a negative pressure difference is formed between the gate and the source of the second P-type MOS transistor P2, so that the drain and the source of the second P-type MOS transistor P2 are connected, the positive voltage input through the second conversion input end AD12 reaches the positive conversion output end AD13 of the polarity conversion circuit, and the drain and the source of the second N-type MOS transistor N2 are disconnected; meanwhile, the drain and the source of the first P-type MOS transistor P1 are cut off, the drain and the source of the first N-type MOS transistor N1 are connected, and the first conversion input terminal AD11 is connected to ground, and the negative conversion output terminal AD14 of the polarity conversion circuit is connected to ground. Therefore, the positive and negative polarities of the two conversion input terminals are always kept unchanged no matter how the positive and negative polarities of the two conversion input terminals are connected.

Based on the same concept, in combination with the foregoing, the present invention further provides an embodiment of a cartridge for an electronic cigarette, the cartridge comprising an atomizer, the cartridge further comprising a first electrode, a second electrode, and a safety circuit, the safety circuit comprising a control module; the control module transmits signals to the outside through the first electrode or the second electrode and performs key verification; the key verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected.

Preferably, the safety circuit further comprises a first switch tube, a first pin of the first switch tube is electrically connected with the negative electrode conversion output end of the polarity conversion circuit, a second pin of the first switch tube is electrically connected with a first power supply end of the atomizer, a control pin of the first switch tube is electrically connected with a control end of the control module, and a second power supply end of the atomizer is electrically connected with the positive electrode conversion output end; a control end of the control module outputs a switching-on control signal, so that a first pin and a second pin of the first switching tube are switched on, and power supply loops of two power supply ends of the atomizer are switched on; and the control end of the control module outputs a disconnection control signal, so that the first pin and the second pin of the first switching tube are disconnected, and the power supply loops of the two power supply ends of the atomizer are disconnected.

Preferably, the safety circuit further comprises an internal power supply electrically connected to the positive switching output terminal of the polarity switching circuit, for supplying power to the safety circuit. The internal power supply components are referred to above and will not be described in detail here.

Based on the same concept and in combination with the above, the invention further provides an embodiment of a safety circuit, wherein the safety circuit comprises a first switch tube and a control module, and the control module performs key verification on an external transmission signal; the key is verified to be valid, and the control module controls the first switch tube to be conducted; and if the key verification is invalid, the control module controls the first switching tube to be disconnected.

It can thus be seen that the present invention discloses a cartridge and a safety circuit for an electronic cigarette. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode which do not distinguish the positive polarity and the negative polarity of the electrodes; when the cigarette rod is connected with the cigarette cartridge, the positive and negative driving electrodes are randomly and electrically connected with the first and second electrodes; a transmission channel formed by connecting the first or second electrode of the cigarette cartridge with the positive driving electrode of the cigarette rod, and a controller in the cigarette rod and a control module in the cigarette cartridge transmit signals to carry out key verification; the verification is effective, the control module controls the power supply circuits of the two power supply ends of the atomizer in the smoke cartridge to be connected, the verification is ineffective, and the control module controls the power supply circuits of the two power supply ends of the atomizer to be disconnected. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette cartridge in the mode, the signal transmission and the power supply are realized by multiplexing the same interface, and therefore counterfeit and shoddy cigarette cartridges are prevented.

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

1. An electronic cigarette comprises a cigarette rod and a cigarette cartridge, and is characterized in that the cigarette rod comprises a positive driving electrode and a negative driving electrode, the cigarette cartridge comprises an atomizer, a first electrode, a second electrode and a safety circuit, and the safety circuit comprises a control module; when the cigarette rod is correspondingly connected with the cigarette cartridge for use, the positive drive electrode and the negative drive electrode of the cigarette rod are correspondingly and respectively in electrical contact connection with the first electrode and the second electrode of the cigarette cartridge, or are correspondingly and respectively in electrical contact connection with the second electrode and the first electrode of the cigarette cartridge; after the cigarette rod is correspondingly connected with the cigarette cartridge, a transmission channel is formed by connecting a first electrode or a second electrode of the cigarette cartridge with a positive driving electrode of the cigarette rod, and a controller in the cigarette rod and a control module in the cigarette cartridge transmit signals to carry out key verification; the key verification is effective, the control module controls the power supply circuit of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply circuit of the atomizer to be disconnected.

2. The electronic cigarette of claim 1, wherein the safety circuit comprises a polarity switching circuit, the polarity switching circuit comprises a first switching input and a second switching input, the first switching input is correspondingly connected with the first electrode or the second electrode, and the second switching input is correspondingly connected with the second electrode or the first electrode; the two switching output ends of the polarity switching circuit are respectively a positive switching output end and a negative switching output end.

3. The electronic cigarette of claim 2, wherein the polarity conversion circuit comprises a first P-type MOS transistor, a second P-type MOS transistor, a first N-type MOS transistor, a second N-type MOS transistor; the grid electrode of the first P-type MOS tube is electrically connected with the grid electrode of the first N-type MOS tube and serves as a first grid electrode connection point; the grid electrode of the second P-type MOS tube is electrically connected with the grid electrode of the second N-type MOS tube and serves as a second grid electrode connection point; the source electrode of the first P-type MOS tube is electrically connected with the drain electrode of the first N-type MOS tube and serves as a first drain electrode connection point; the source electrode of the second P-type MOS tube is electrically connected with the drain electrode of the second N-type MOS tube and serves as a second drain electrode connection point; the drain electrode of the first P-type MOS tube is electrically connected with the drain electrode of the second P-type MOS tube and is used as the anode conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as the negative pole conversion output end of the polarity conversion circuit; the first switching input terminal is electrically connected to the first drain connection point and the second gate connection point, and the second switching input terminal is electrically connected to the second drain connection point and the first gate connection point.

4. The electronic cigarette of claim 2, wherein the safety circuit further comprises a first switch tube, a first pin of the first switch tube is electrically connected with a negative electrode switching output end of the polarity switching circuit, a second pin of the first switch tube is electrically connected with a first power supply end of the atomizer, a control pin of the first switch tube is electrically connected with a control end of the control module, and a second power supply end of the atomizer is electrically connected with a positive electrode switching output end; a control end of the control module outputs a switching-on control signal, so that a first pin and a second pin of the first switching tube are switched on, and power supply loops of two power supply ends of the atomizer are switched on; and the control end of the control module outputs a disconnection control signal, so that the first pin and the second pin of the first switching tube are disconnected, and the power supply loops of the two power supply ends of the atomizer are disconnected.

5. The electronic cigarette of claim 2, wherein the safety circuit further comprises an internal power supply electrically connected to the positive switching output of the polarity switching circuit for supplying power to the safety circuit.

6. The electronic cigarette according to any one of claims 1 to 5, wherein the control module comprises a signal receiving and sending unit, a safety algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is electrically connected with the first electrode and the second electrode and is used for signal transmission with a controller in the cigarette rod, the safety algorithm engine unit is used for carrying out key verification on information content from the controller in the cigarette rod and correspondingly generating an on control signal or an off control signal to cause the verification state latch unit, and the verification state latch unit latches the on control signal or the off control signal generated and output by the safety algorithm engine unit and outputs a control signal for controlling the power supply circuit of the atomizer to be switched on or switched off.

7. The electronic cigarette according to any one of claims 1 to 5, wherein the cigarette rod further comprises a battery, a second switch tube, and an atomization driver inside, the atomization driver is used for driving and controlling power supply of an atomizer in the cartridge, and the controller is also electrically connected with the positive driving electrode; the negative driving electrode is electrically connected with the negative electrode of the battery, the positive driving electrode is electrically connected with the second pin of the second switching tube, the positive electrode of the battery is electrically connected with the first pin of the second switching tube, and the control pin of the second switching tube is electrically connected with the control pin of the atomization driver;

if the key is verified to be valid, the controller of the cigarette rod controls the atomization driver to output a valid enabling signal to the second switch tube, a second pin of the second switch tube is connected with the first pin, the anode of the battery is further connected with a second power supply end of the atomizer, and the control module in the cigarette cartridge also controls the power supply loop of the atomizer to be connected; and if the key verification is invalid, the controller of the cigarette rod controls the atomization driver to output an invalid enabling signal to the second switch tube, the second pin of the second switch tube is disconnected with the first pin, the anode of the battery is disconnected with the second power supply end of the atomizer, and the control module in the cigarette bullet also controls the power supply loop of the atomizer to be disconnected.

8. A cartridge for an electronic cigarette, the cartridge comprising an atomizer, characterized in that the cartridge further comprises a first electrode, a second electrode and a safety circuit, the safety circuit comprising a control module; the control module transmits signals to the outside through the first electrode or the second electrode and performs key verification; the key verification is effective, the control module controls the power supply circuit of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply circuit of the atomizer to be disconnected.

9. The cartridge of claim 8, wherein the safety circuit comprises a polarity switching circuit, the polarity switching circuit comprising a first switching input and a second switching input, the first switching input being connected to the first electrode or the second electrode, and the second switching input being connected to the second electrode or the first electrode; the two switching output ends of the polarity switching circuit are respectively a positive switching output end and a negative switching output end.

10. The cartridge of claim 9, wherein the polarity switching circuit comprises a first P-type MOS transistor, a second P-type MOS transistor, a first N-type MOS transistor, a second N-type MOS transistor; the grid electrode of the first P-type MOS tube is electrically connected with the grid electrode of the first N-type MOS tube and serves as a first grid electrode connection point; the grid electrode of the second P-type MOS tube is electrically connected with the grid electrode of the second N-type MOS tube and serves as a second grid electrode connection point; the source electrode of the first P-type MOS tube is electrically connected with the drain electrode of the first N-type MOS tube and serves as a first drain electrode connection point; the source electrode of the second P-type MOS tube is electrically connected with the drain electrode of the second N-type MOS tube and serves as a second drain electrode connection point; the drain electrode of the first P-type MOS tube is electrically connected with the drain electrode of the second P-type MOS tube and is used as the anode conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as the negative pole conversion output end of the polarity conversion circuit; the first switching input terminal is electrically connected to the first drain connection point and the second gate connection point, and the second switching input terminal is electrically connected to the second drain connection point and the first gate connection point.

11. The cartridge of claim 9, wherein the safety circuit further comprises a first switch tube, a first pin of the first switch tube is electrically connected to the negative switching output terminal of the polarity switching circuit, a second pin of the first switch tube is electrically connected to the first power supply terminal of the atomizer, a control pin of the first switch tube is electrically connected to the control terminal of the control module, and a second power supply terminal of the atomizer is electrically connected to the positive switching output terminal; a control end of the control module outputs a switching-on control signal, so that a first pin and a second pin of the first switching tube are switched on, and power supply loops of two power supply ends of the atomizer are switched on; and the control end of the control module outputs a disconnection control signal, so that the first pin and the second pin of the first switching tube are disconnected, and the power supply loops of the two power supply ends of the atomizer are disconnected.

12. The cartridge for an electronic cigarette of claim 9, wherein the safety circuit further comprises an internal power supply electrically connected to the positive switching output of the polarity switching circuit for supplying power to the safety circuit.

13. The cartridge of any one of claims 8 to 12, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is electrically connected with the first electrode and the second electrode and used for carrying out signal transmission externally, the safety algorithm engine unit is used for verifying a secret key and correspondingly generates a connection control signal or a disconnection control signal to cause the verification state latch unit, and the verification state latch unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit and outputs a signal for controlling the connection or the disconnection of a power supply loop of the atomizer.

14. The safety circuit is characterized by comprising a first switching tube and a control module, wherein the control module is used for carrying out key verification on an external transmission signal; the key is verified to be valid, and the control module controls the first switch tube to be conducted; and if the key verification is invalid, the control module controls the first switching tube to be disconnected.

15. The safety circuit according to claim 14, wherein the safety circuit comprises a polarity switching circuit, the polarity switching circuit comprises a first switching input and a second switching input, and the two switching outputs of the polarity switching circuit are a positive switching output and a negative switching output respectively; the control pin of the first switch tube is electrically connected with the control end of the control module, the control end of the control module outputs a switch-on control signal, so that the first pin of the first switch tube is connected with the second pin, and the control end of the control module outputs a switch-off control signal, so that the first pin of the first switch tube is disconnected with the second pin.

16. The safety circuit according to claim 15, wherein the polarity switching circuit comprises a first P-type MOS transistor, a second P-type MOS transistor, a first N-type MOS transistor, and a second N-type MOS transistor; the grid electrode of the first P-type MOS tube is electrically connected with the grid electrode of the first N-type MOS tube and serves as a first grid electrode connection point; the grid electrode of the second P-type MOS tube is electrically connected with the grid electrode of the second N-type MOS tube and serves as a second grid electrode connection point; the source electrode of the first P-type MOS tube is electrically connected with the drain electrode of the first N-type MOS tube and serves as a first drain electrode connection point; the source electrode of the second P-type MOS tube is electrically connected with the drain electrode of the second N-type MOS tube and serves as a second drain electrode connection point; the drain electrode of the first P-type MOS tube is electrically connected with the drain electrode of the second P-type MOS tube and is used as the anode conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as the negative pole conversion output end of the polarity conversion circuit; the first switching input terminal is electrically connected to the first drain connection point and the second gate connection point, and the second switching input terminal is electrically connected to the second drain connection point and the first gate connection point.

17. The safety circuit of claim 15, further comprising an internal power supply electrically connected to the positive switching output of the polarity switching circuit for supplying power to the safety circuit.

18. The safety circuit according to any one of claims 14 to 17, wherein the control module comprises a signal receiving and sending unit, a safety algorithm engine unit and a verification state latch unit which are electrically connected in sequence; the signal receiving and sending unit is used for transmitting signals to the outside, the security algorithm engine unit is used for verifying keys and correspondingly generates a connection control signal or a disconnection control signal to cause the verification state latch unit, and the verification state latch unit latches the connection control signal or the disconnection control signal output by the security algorithm engine unit.