CN112089098B

CN112089098B - Electronic cigarette, and cartridge and safety circuit for electronic cigarette

Info

Publication number: CN112089098B
Application number: CN202011075236.3A
Authority: CN
Inventors: 宋利军; 徐紫皇
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: 2024-03-15
Anticipated expiration: 2040-10-09
Also published as: CN112089098A

Abstract

The invention discloses an electronic cigarette, a cigarette cartridge for the electronic cigarette and a safety circuit. The cigarette stem 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 an isolation circuit and a control module; when the cigarette rod is connected with the cigarette bullet, the positive driving electrode and the negative driving electrode are electrically connected with the first electrode and the second electrode or are electrically connected with the second electrode and the first electrode; after the tobacco stem is connected with the tobacco cartridge, a signal transmission channel is formed by connecting a first electrode or a second electrode with a positive driving electrode of the tobacco stem, and a signal is transmitted between a controller and a control module in the tobacco stem for key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with the power supply loop of the atomizer; the key verification is invalid, and the control module controls the isolation circuit to disconnect the power supply loop of the atomizer. From this cigarette bullet and tobacco stem can connect at will, multiplexing same interface prevents fake bad cigarette bullet, simple structure, compatible current electron cigarette.

Description

Electronic cigarette, and cartridge and safety circuit for electronic cigarette

Technical Field

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

Background

In the prior art, the electronic cigarette consists of a cigarette rod and a cigarette bullet, the cigarette rod and the cigarette bullet are combined for use, the cigarette rod can be used for a long time, the cigarette bullet is a disposable consumable, tobacco tar is arranged in the disposable consumable, and after the tobacco tar is consumed, the cigarette bullet can be discarded and is used in combination with the cigarette rod again.

The interface between tobacco stem and the cigarette bullet includes mechanical interface and electrical interface, and electrical interface is mainly two electrodes to the cigarette bullet power supply, and in the prior art, after tobacco stem and cigarette bullet combined, the two directly can carry out the power supply and connect and can cooperate the use. This provides a very realistic opportunity for various counterfeit cartridges, thereby greatly encroaching upon the market share of regular cartridges.

In order to realize the anti-counterfeiting of the cartridge, an information communication interface between the cartridge and the tobacco stem is added in the electric interface, and the information communication interface generally comprises a power supply connection end, a ground connection end, a signal connection end and the like, and mutual authentication is carried out between the cartridge and the tobacco stem through the information communication interface, so that the cartridge is ensured not to be replaced by a counterfeit product. However, since the information communication interface is additionally arranged between the cigarette bullet and the cigarette stem, the interface further comprises a plurality of connecting ends, the electrical connection mode between the existing cigarette bullet and the cigarette stem is changed, the hardware cost of the interface is increased, the physical structures of the cigarette bullet and the cigarette stem are changed to be complex, the damage rate of the cigarette bullet and the cigarette stem is increased when the cigarette bullet and the cigarette stem are connected in a plugging mode, the universality is not strong, and the satisfaction degree of user consumption experience is reduced.

Disclosure of Invention

The invention mainly solves the technical problems of low cost, no change of interconnection structure between the cartridge and the tobacco stem of the electronic cigarette and mutual safety authentication to prevent counterfeit products in the prior art.

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 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 an isolation circuit and a control module, wherein the isolation circuit is used for controlling the connection or disconnection of a power supply loop of the atomizer; when the cigarette rod is correspondingly connected with the cigarette bullet for use, the positive driving electrode and the negative driving electrode of the cigarette rod are correspondingly connected with the first electrode and the second electrode of the cigarette bullet in an electric contact way respectively, or are correspondingly connected with the second electrode and the first electrode of the cigarette bullet in an electric contact way respectively; after the tobacco stem is correspondingly connected with the tobacco cartridge, a signal transmission channel is formed by connecting a first electrode or a second electrode of the tobacco cartridge with a positive driving electrode of the tobacco stem, and a signal is transmitted between a controller in the tobacco stem and a control module in the tobacco cartridge for key verification; the key verification is effective, the control module controls the isolation circuit to be connected with the power supply loop of the atomizer, the key verification is ineffective, and the control module controls the isolation circuit to be disconnected with the power supply loop of the atomizer.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation N-type MOS tube, wherein a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through an NOT gate, the first control MOS tube and the second control MOS tube are both N-type MOS tubes, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation N-type MOS tube, a drain electrode of the second control MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N-type MOS tube.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation P-type MOS tube, wherein a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through an NOT gate, the first control MOS tube and the second control MOS tube are both P-type MOS tubes, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation P-type MOS tube, a drain electrode of the second control MOS tube is electrically connected with a source electrode of the isolation P-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation P-type MOS tube.

Preferably, the cartridge further comprises an internal power source electrically connected to the first electrode and the second electrode for supplying power to the safety circuit.

Preferably, the internal power supply includes a first diode, a second diode, a third diode, a fourth diode and a power supply capacitor, where the anode of the first diode is electrically connected to the first electrode, the cathode of the first diode is electrically connected to the cathode of the second diode, the junction is used as a positive voltage output end for supplying power to the safety circuit, the junction is further electrically connected to the power supply capacitor and then grounded, the anode of the second diode is electrically connected to the second electrode, the anode of the third diode is grounded, and is also electrically connected to the anode of the fourth diode and is grounded, the cathode of the third diode is electrically connected to the anode of the first diode and is also electrically connected to the first electrode, and the cathode of the fourth diode is electrically connected to the anode of the second diode and is also electrically connected to the second electrode.

Preferably, the internal power supply comprises a polarity conversion circuit arranged between the first electrode and the second electrode, wherein the polarity conversion circuit comprises a first P-type MOS tube, a second P-type MOS tube, a first N-type MOS tube and a second N-type MOS tube; 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode 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 electrode output end of the polarity conversion circuit; the first electrode is electrically connected to the first drain connection point and the second gate connection point, and the second electrode is electrically connected to the second drain connection point and the first gate connection point.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a boost circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode and is used for transmitting signals between the signal receiving and transmitting unit and the controller in the tobacco stem, the safety algorithm engine unit is used for carrying out key identification on information content from the controller in the tobacco stem and correspondingly generating a connection control signal or a disconnection control signal to cause the verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit, and the boosting circuit unit is used for boosting the control signal which is output by the verification state latching unit.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a negative pressure circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode and is used for transmitting signals between the signal receiving and transmitting unit and the controller in the tobacco stem, the safety algorithm engine unit is used for carrying out key identification on information content from the controller in the tobacco stem and correspondingly generating a connection control signal or a disconnection control signal to cause the verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure on the control signal which is output by the verification state latching unit.

Preferably, the cigarette stem further comprises a battery, a second switch tube and an atomization driver, wherein the positive electrode of the battery is electrically connected with a first pin of the second switch tube, the positive driving electrode is electrically connected with a second pin of the second switch tube, a control pin of the second switch tube is electrically connected with an output pin of the atomization driver, the negative electrode of the battery is electrically connected with the negative driving electrode, and the controller is also respectively electrically connected with the atomization driver and the positive driving electrode; after the tobacco stem is correspondingly connected with the tobacco bullet, the controller of the tobacco stem is connected with the first electrode through the positive driving electrode, or is connected with the second electrode through the positive driving electrode, and receives and transmits signals between the tobacco stem and the control module, and performs key verification, wherein the controller of the tobacco stem controls the atomization driver to output effective enabling signals to the second switching tube, a first pin and a second pin of the second switching tube are communicated, and then a battery supplies power to two ends of the atomizer; and if the key verification is invalid, the controller of the tobacco stem controls the atomization driver to output an invalid enabling signal to the second switching tube, the first pin and the second pin of the second switching tube are disconnected, and then the battery is disconnected to supply power to two ends of the atomizer.

The invention also provides a cigarette cartridge for the electronic cigarette, which comprises an atomizer, a first electrode, a second electrode and a safety circuit, wherein the safety circuit comprises an isolation circuit and a control module for controlling the connection or disconnection of a power supply loop of the atomizer; the control module externally transmits signals through the first electrode or the second electrode and performs key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with a power supply loop of the atomizer; and the control module controls the isolation circuit to disconnect the power supply loop of the atomizer.

Preferably, the internal power supply includes a first diode, a second diode, a third diode, a fourth diode and a power supply capacitor, where the anode of the first diode is electrically connected to the first electrode, the cathode of the first diode is electrically connected to the cathode of the second diode, the junction is used as a positive voltage output end for supplying power to the safety circuit, the junction is further electrically connected to the power supply capacitor and then grounded, the anode of the second diode is electrically connected to the second electrode, the anode of the third diode is grounded, and simultaneously, the anode of the fourth diode is electrically connected to the anode of the fourth diode and simultaneously, the cathode of the third diode is electrically connected to the anode of the first diode and also electrically connected to the first electrode, and the cathode of the fourth diode is electrically connected to the anode of the second diode and simultaneously, and also electrically connected to the second electrode.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a boost circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode, is used for externally transmitting signals, is used for key identification, correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal generated and output by the security algorithm engine unit, and the boosting circuit unit boosts the control signal output by the verification state latching unit.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a negative pressure circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode, is used for externally transmitting signals, is used for key identification, correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal generated and output by the security algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure to the control signal output by the verification state latching unit.

The invention also provides a safety circuit, which comprises an isolation circuit and a control module, wherein the control module performs key verification on an external transmission signal; the key verification is effective, and the control module controls the isolation circuit to be conducted; and the control module controls the isolation circuit to be disconnected.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation N-type MOS tube, wherein a first input end of the comparator is externally connected with one electrode, a second input end of the comparator is externally connected with the other electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through a NOT gate, the first control MOS tube and the second control MOS tube are both N-type MOS tubes, sources of the first control MOS tube and the second control MOS tube are mutually and electrically connected with a drain electrode of the isolation N-type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a drain electrode of the isolation N-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N-type MOS tube.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation P-type MOS tube, wherein a first input end of the comparator is externally connected with one electrode, a second input end of the comparator is externally connected with the other electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through a NOT gate, the first control MOS tube and the second control MOS tube are both P-type MOS tubes, sources of the first control MOS tube and the second control MOS tube are mutually and electrically connected with a drain electrode of the isolation P-type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a drain electrode of the isolation P-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation P-type MOS tube.

Preferably, the safety circuit further comprises an internal power supply, the internal power supply comprises a first diode, a second diode, a third diode, a fourth diode and a power supply capacitor, wherein the anode of the first diode is used as a first power supply access end, the cathode of the first diode is electrically connected with the cathode of the second diode, the junction is used as a positive voltage output end for supplying power to the safety circuit, the junction is further electrically connected with the power supply capacitor and then grounded, the anode of the second diode is used as a second power supply access end, the anode of the third diode is grounded and is also electrically connected with the anode of the fourth diode to be grounded, the cathode of the third diode is electrically connected with the anode of the first diode and is also electrically connected with the first power supply access end, and the cathode of the fourth diode is electrically connected with the anode of the second diode and is also electrically connected with the second power supply access end; or the internal power supply comprises a first P-type MOS tube, a second P-type MOS tube, a first N-type MOS tube and a second N-type MOS tube; 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode output end of the internal power supply; 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 electrode output end of the internal power supply; the first drain connection point and the second gate connection point are electrically connected as a first power supply access terminal, and the second drain connection point and the first gate connection point are electrically connected as a second power supply access terminal.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a boost circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is used for externally transmitting signals, the security algorithm engine unit is used for key identification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the security algorithm engine unit, and the boosting circuit unit boosts the control signal which is output by the verification state latching unit.

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a negative pressure circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is used for externally transmitting signals, the security algorithm engine unit is used for key identification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the security algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure for the control signal which is output by the verification state latching unit.

The invention has the technical effects that: the invention discloses an electronic cigarette, a cigarette cartridge for the electronic cigarette and a safety circuit. The cigarette stem 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 an isolation circuit and a control module; when the cigarette rod is connected with the cigarette bullet, the positive driving electrode and the negative driving electrode are electrically connected with the first electrode and the second electrode or are electrically connected with the second electrode and the first electrode; after the tobacco stem is connected with the tobacco cartridge, a signal transmission channel is formed by connecting a first electrode or a second electrode with a positive driving electrode of the tobacco stem, and a signal is transmitted between a controller in the tobacco stem and a control module in the tobacco cartridge for key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with the power supply loop of the atomizer; the key verification is invalid, and the control module controls the isolation circuit to disconnect the power supply loop of the atomizer. From this cigarette bullet and tobacco stem can connect at will, multiplexing same interface prevents fake bad cigarette bullet, simple structure, compatible current electron cigarette.

Drawings

FIG. 1 is a schematic diagram of the composition of an embodiment of an electronic cigarette according to the present invention;

FIG. 2 is a schematic diagram of the composition of an embodiment of a tobacco rod in an electronic cigarette according to the present invention;

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

fig. 4 is a schematic diagram of the composition of another embodiment of a cartridge in an electronic cigarette according to the invention;

fig. 5 is a schematic diagram of the composition of a signal receiving-transmitting unit in an embodiment of a cartridge in an electronic cigarette according to the present invention;

fig. 6 is a schematic diagram of the internal power supply composition in an embodiment of a cartridge in an electronic cigarette according to the present invention.

Detailed Description

In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. 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.

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. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the invention discloses an electronic cigarette, which comprises 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 first electrode YD1, a second electrode YD2 and a safety circuit, and the safety circuit comprises an isolation circuit AD1 and a control module AD2, wherein the isolation circuit AD1 is used for controlling the connection or disconnection of a power supply loop of an atomizer YD 3; when the cigarette rod is correspondingly connected with the cigarette cartridge for use, the positive driving electrode YG1 and the negative driving electrode G2 of the cigarette rod are correspondingly connected with the first electrode YD1 and the second electrode YD2 of the cigarette cartridge respectively in an electric contact manner, or are correspondingly connected with the second electrode YD2 and the first electrode YD1 of the cigarette cartridge respectively in an electric contact manner; the cigarette bullet comprises an atomizer YD3, after the cigarette stem is correspondingly connected with the cigarette bullet, a signal transmission channel is formed by connecting a first electrode YD1 or a second electrode YD2 of the cigarette bullet with a positive driving electrode YG1 of the cigarette stem, and a signal is transmitted between a controller YG3 in the cigarette stem and a control module AD2 in the cigarette bullet for key verification; the key verification is effective, the control module AD2 controls the isolation circuit AD1 to be connected with the power supply loop of the atomizer YD3, the key verification is ineffective, and the control module AD2 controls the isolation circuit AD1 to be disconnected with the power supply loop of the atomizer YD 3.

Here, the power supply circuit of the atomizer YD3 refers to an electrical connection channel between two power supply ends of the atomizer YD3 and positive and negative poles of a power supply, and when the two power supply ends of the atomizer YD3 are powered, the two power supply ends need to be respectively connected with the first electrode YD1 and the second electrode YD2, so that the power supply circuit is only connected to supply power. When the power supply is disconnected, only at least one power supply end is disconnected.

It should be noted that, the first electrode and the second electrode are not distinguished by positive and negative polarities of the electrodes, that is, the first electrode may be connected to a positive voltage or may be grounded, and the second electrode may also be connected to a positive voltage or may be grounded, so that when the first electrode is connected to a positive voltage, the second electrode is grounded, or the second electrode is connected to a positive voltage, the first electrode is grounded correspondingly. Therefore, when the cartridge is connected with the tobacco stem, although the positive driving electrode and the negative driving electrode of the tobacco stem are two electrodes for distinguishing the positive electrode from the negative electrode, the first electrode and the second electrode in the cartridge do not need to be distinguished from each other, so that the problem of opposite electrode connection is not worried about when the two electrodes are connected, that is, the positive driving electrode and the negative driving electrode of the tobacco stem can be correspondingly connected with the first electrode and the second electrode, or the positive driving electrode and the negative driving electrode of the tobacco stem can be correspondingly connected with the second electrode and the first electrode. Therefore, the safety, reliability and convenience in use of the connection of the cigarette rod and the cigarette bullet can be ensured, and damage to the electronic cigarette caused by the wrong electrode connection can be avoided.

Preferably, the key verification is effective, 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 connection state is latched and maintained; 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 in a latching way.

The key verification is mainly that the key is identified and checked between the controller and the control module of the tobacco stem.

Preferably, the first mode of key identification is that the controller sends the key to the control module, and only one-way sending is needed, the control module receives the key and then performs solution verification, and the result of the solution verification comprises that the key verification is valid or the key verification is invalid. The method can further comprise the step that the control module feeds back the result of the calculation verification to the controller, or the feedback is not needed, so that the controller only needs to carry out unidirectional communication signal transmission to the control module to send the secret key.

Preferably, the second mode of key identification is that the control module sends a key to the controller, the controller receives the key and then performs resolving verification, the resolving verification result comprises that the key verification is valid or the key verification is invalid, then the controller feeds back and sends the resolving verification result to the control module, and the control module performs the on-off control on the two power supply ends of the atomizer after receiving the resolving verification result.

Preferably, for example, the controller of the tobacco rod reads the key stored therein from the control module, and if the key is one that is normally valid, the controller identifies that the cartridge is a normally acceptable product. Otherwise, if the key cannot be read, or the read key is an expired key, a repeated key or an incorrect key, the key belongs to an invalid key, the controller recognizes that the cartridge is a counterfeit cartridge, and correspondingly takes control actions, such as controlling to make the cartridge not normally used, and not performing power supply heating on the atomizer therein. If the key is an effective key, the controller transmits an effective identification result to the control module through a signal, and after the control module receives the effective identification result, an output connection control signal is correspondingly generated; if the key is invalid, the controller transmits an invalid identification result to the control module through a signal, after the control module receives the invalid identification result, the control module correspondingly generates an output disconnection control signal, or if the control module cannot obtain a feedback signal of the controller within a specified time range, the control module also considers that effective key verification is not performed, and correspondingly generates the output disconnection control signal. Therefore, mutual authentication between the cartridge and the tobacco rod can be realized in this way, and mutual adaptation and use are ensured.

It can also be seen that, in order to realize the key authentication, after the first electrode or the second electrode of the cartridge is connected with the positive driving electrode of the tobacco rod, a signal transmission channel is further established between the control module and the controller, that is, an electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge with the positive driving electrode of the tobacco rod has the function of a signal transmission channel required by key information interaction, and the electrical connection channel formed by connecting the first electrode or the second electrode of the cartridge with the positive driving electrode of the tobacco rod is mainly used as a connection channel of a power supply source, so that in order to save an electrical connection interface, the connection interface of the power supply source realizes multiplexing. 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 shell and the cigarette rod is not required to be changed, the purpose of safety and anti-counterfeiting can be achieved only by replacing the circuit in the cigarette rod and the cigarette shell, 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, an atomizing driver YG5, and a second switching tube YG6, wherein a positive electrode YG41 of the battery YG4 is electrically connected with a first pin YG61 of the second switching tube YG6, a positive driving electrode YG1 is electrically connected with a second pin YG62 of the second switching tube YG6, a control pin of the second switching tube YG6 is electrically connected with an output pin of the atomizing driver YG5, a negative electrode YG42 of the battery YG4 is electrically connected with the negative driving electrode YG2, and a controller YG3 is also electrically connected with the atomizing driver YG5 and the positive driving electrode YG1, respectively. Further, after the tobacco stem is correspondingly connected with the tobacco cartridge, the controller YG3 of the tobacco stem is connected with the first electrode through the positive driving electrode YG1, or is connected with the second electrode through the positive driving electrode YG1, signals are sent and received between the control module and the control module, key verification is carried out, if the key verification is effective, the controller YG3 of the tobacco stem controls the atomization driver YG5 to output an effective enabling signal to the second switching tube YG6, the first pin YG61 and the second pin YG62 of the second switching tube YG6 are communicated, and then the battery YG4 supplies power to two ends of the atomizer; and if the key verification is invalid, the controller YG3 of the cigarette rod controls the atomization driver YG5 to output an invalid enabling signal to the second switching tube YG6, the first pin YG61 and the second pin YG62 of the second switching tube YG6 are disconnected, and then the battery YG4 is disconnected to supply power to two ends of the atomizer.

Preferably, in fig. 2, the device further comprises a suction detector YG7, when the cigarette rod is connected with the cigarette cartridge, and after the key verification is valid, the isolation circuit in the cigarette cartridge is always in a closed state, and the second switching tube only controls the atomization driver YG5 to output a valid enabling signal to the second switching tube YG6 after the suction detector YG7 detects the suction force generated by sucking the cigarette cartridge, the first pin YG61 and the second pin YG62 of the second switching tube YG6 are connected, and then the battery YG4 supplies power to two ends of the atomizer. When the suction detector YG7 detects that the cartridge is not sucked and is not generated, the atomizing driver YG5 is controlled to output an invalid enabling signal to the second switching tube YG6, the first pin YG61 and the second pin YG62 of the second switching tube YG6 are disconnected, and the battery YG4 cannot supply power to two ends of the atomizer. It follows that the battery also supplies power to the atomizer only when the cartridge is being sucked, and that the two pins of the second switching tube YG6 are open when not being sucked, and cannot supply power to the atomizer.

Further, fig. 3 shows the detailed composition of the safety circuit in the cartridge. The isolation circuit AD1 includes a first control MOS tube AD11, a second control MOS tube AD12, a comparator AD13, and an isolation N-type MOS tube AD14, wherein a first input end of the comparator AD13 is electrically connected to one power supply end of the atomizer YD3, another power supply end of the atomizer YD3 is electrically connected to the first electrode YD1, a second input end of the comparator is electrically connected to the second electrode YD2, an output end of the comparator AD13 is divided into two paths, one path of output is directly electrically connected to a gate of the first control MOS tube AD11, the other path of output is electrically connected to a gate of the second control MOS tube AD12 after passing through a gate, the first control MOS tube AD11 and the second control MOS tube AD12 are both N-type MOS tubes, sources of the two MOS tubes are electrically connected to each other, and are electrically connected to a drain of the isolation N-type MOS tube AD14, a drain of the first control MOS tube AD11 is electrically connected to a drain of the isolation N-type MOS tube AD14, and a drain of the second control MOS tube AD12 is electrically connected to a source of the isolation N-type MOS tube AD 14. The control module outputs a control signal to the grid electrode of the isolation N-type MOS tube.

The isolation circuit AD1 in fig. 3 is disposed on a side close to the second electrode YD2, i.e., between one power supply end of the atomizer and the second electrode YD 2. Of course, the isolation circuit AD1 may also be disposed on a side close to the first electrode YD1, i.e. between the other power supply end of the atomizer and the first electrode YD 1. Both of these conditions are equivalent, and the power supply circuit of the atomizer can be controlled to be on and off.

Based on the circuit in fig. 3, when the first electrode YD1 is connected to a positive voltage and the second electrode YD2 is grounded or negative voltage, the comparator AD13 outputs a low level, and the gate corresponding to the first control MOS transistor AD11 is low, and the gate of the second control MOS transistor AD12 is high because the output of the comparator passes through the not gate, the first control MOS transistor AD11 is turned off, and the second control MOS transistor AD12 is turned on. When the key verification is invalid, the low level control signal, such as 0V, outputted by the verification state latch unit is not conducted between the drain and the source of the isolation N-type MOS transistor AD14, so that the isolation circuit AD1 is in an off state. If the key verification is valid, the high-level control signal output by the state latch unit is verified, and the drain electrode of the N-type MOS tube AD14 are isolated, so that one power supply end of the atomizer is conducted with the second electrode through the isolating circuit AD 1. Here, since the positive voltage connected to the first electrode YD1 reaches the drain electrode of the isolation N-type MOS transistor AD14, in order to make the drain electrode and the source electrode of the isolation N-type MOS transistor AD14 fully conductive, the voltage applied to the gate electrode of the isolation N-type MOS transistor AD14 needs to be sufficiently high, which is greater than the positive voltage connected to the first electrode YD 1. Therefore, it is required to generate a higher control voltage through the boost circuit unit AD24, and the control voltage is applied to the gate of the isolation N-type MOS transistor AD14 through the verification state latch unit AD23, for example, the voltage may be 2 times the battery voltage (i.e., the positive voltage input from the outside to the first electrode), i.e., 4.8V, so that the drain and the source of the isolation N-type MOS transistor AD14 are sufficiently conducted.

When the first electrode YD1 is grounded or negative voltage and the second electrode YD2 is positive voltage, the comparator AD13 outputs a high level, and the gate of the first control MOS transistor AD11 is correspondingly high, and the gate of the second control MOS transistor AD12 is low because the output of the comparator passes through the nor gate, the first control MOS transistor AD11 is turned on, and the second control MOS transistor AD12 is turned off. When the key verification is invalid, the low level control signal, such as 0V, outputted by the verification state latch unit is not conducted between the drain and the source of the isolation N-type MOS transistor AD14, so that the isolation circuit AD1 is in an off state. If the key verification is valid, the high-level control signal output by the state latch unit is verified, and the drain electrode and the source electrode of the N-type MOS tube AD14 are isolated, so that one power supply end of the atomizer is conducted with the second electrode through the isolating circuit AD 1. Similarly, since the positive voltage connected to the second electrode YD2 reaches the source of the isolated N-type MOS transistor AD14, the voltage applied to the gate of the isolated N-type MOS transistor AD14 needs to be sufficiently high to be greater than the positive voltage connected to the second electrode YD2 in order to fully turn on the drain and the source of the isolated N-type MOS transistor AD 14. Therefore, it is required to generate a higher control voltage through the boost circuit unit AD24, and the control voltage is applied to the gate of the isolation N-type MOS transistor AD14 through the verification state latch unit AD23, for example, the voltage may be 2 times the battery voltage (i.e., the positive voltage input from the outside to the first electrode), i.e., 4.8V, so that the drain and the source of the isolation N-type MOS transistor AD14 are sufficiently conducted.

Therefore, through the above description, no matter how the first electrode and the second electrode are connected with positive voltage and negative voltage, the grid electrode of the isolation N-type MOS tube can be controlled, and one power supply end of the atomizer is connected with the second electrode, so that the power supply loop of the atomizer can be controlled to be powered on or off.

Preferably, the isolation N-type MOS transistor of the isolation circuit in fig. 3 may also be an isolation P-type MOS transistor, the first control MOS transistor and the second control MOS transistor also correspond to the P-type MOS transistor, other components and circuit structures of the isolation circuit are unchanged, in addition, the boost circuit unit needs to be replaced by the negative pressure circuit unit correspondingly, when the isolation P-type MOS transistor is conducted and controlled at this time, a negative voltage control signal output by the state latch unit needs to be verified, and detailed circuit components are shown in fig. 4, and the same parts as those shown in fig. 3 are not repeated.

For fig. 4, the corresponding description is as follows: the isolation circuit AD1 comprises a first control MOS tube AD11, a second control MOS tube AD12, a comparator AD13 and an isolation P-type MOS tube, wherein a first input end of the comparator AD13 is electrically connected with one power supply end of the atomizer YD3, the other power supply end of the atomizer YD3 is electrically connected with a first electrode YD1, a second input end of the comparator is electrically connected with a second electrode YD2, an output end of the comparator AD13 is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube AD11, the other path of output is electrically connected with a grid electrode of the second control MOS tube AD12 after passing through a NOT gate, the first control MOS tube AD11 and the second control MOS tube AD12 are both P-type MOS tubes, sources of the two MOS tubes are electrically connected with each other and are electrically connected with a drain electrode of the isolation P-type MOS tube, a drain electrode of the first control MOS tube AD11 is electrically connected with a drain electrode of the isolation P-type MOS tube, and a drain electrode of the second control MOS tube AD12 is electrically connected with a source electrode of the isolation P-type MOS tube. The control module outputs a control signal to the grid electrode of the isolated P-type MOS tube.

When the first electrode YD1 is connected to positive voltage and the second electrode YD2 is grounded, the comparator AD13 outputs a low level (e.g., 0V), and the gate of the first control MOS transistor AD11 is correspondingly low, and the gate of the second control MOS transistor AD12 is high (e.g., 2.8V) due to the output of the comparator passing through the nor gate, and the first control MOS transistor AD11 is correspondingly turned on and the second control MOS transistor AD12 is turned off. When the key verification is invalid, the verification state latch unit outputs a high-voltage control signal, for example, 2.8V, and the drain electrode and the source electrode of the isolation P-type MOS tube are not conducted, so that the isolation circuit AD1 is in an off state. If the key verification is valid, the verification state latch unit outputs a negative voltage control signal, for example, -2.8V, and the drain electrode and the source electrode of the P-type MOS transistor are isolated to be conducted, so that one power supply end of the atomizer is conducted with the second electrode YD2 through the isolating circuit AD 1.

When the first electrode YD1 is grounded and the second electrode YD2 is positive, the comparator AD13 outputs a high level at this time, and the gate of the first control MOS transistor AD11 is correspondingly high, and the gate of the second control MOS transistor AD12 is low because the output of the comparator passes through the nor gate, the first control MOS transistor AD11 is turned off, and the second control MOS transistor AD12 is turned on. When the key verification is invalid, the high voltage control signal output by the verification state latch unit, such as 2.8V, is not conducted between the drain and the source of the isolation P-type MOS transistor AD14, so that the isolation circuit AD1 is in an off state. If the key verification is valid, the verification state latch unit outputs a negative voltage control signal, for example, -2.8V, to isolate the drain and source of the P-type MOS transistor AD14, so that one power supply terminal of the atomizer is connected to the second electrode through the isolation circuit AD 1.

Therefore, through the above description, no matter how the first electrode and the second electrode are connected with positive voltage and negative voltage, the grid electrode of the isolation P-type MOS tube can be controlled, and one power supply end of the atomizer is connected with the second electrode, so that the power supply loop of the atomizer can be controlled to be powered on or off.

Further, in fig. 3, the signal receiving/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.

Referring to fig. 5, the communication interfaces of the signal receiving and transmitting unit include a first communication interface Tj1 and a second communication interface Tj2, where the two communication interfaces have the same circuit composition, and each communication interface includes four connection ports, taking the first communication interface Tj1 as an example, that is, a positive input port Tj11, a negative input port Tj12, a receiving output port Tj13, and a transmitting output port Tj14, a first receiving amplifier Tj15 is included in the communication interface, a first transmitting N-type MOS transistor Tj16, a second transmitting N-type MOS transistor Tj17 are included in the communication interface, an input end of the first receiving amplifier Tj15 is electrically connected to a source electrode of the first transmitting N-type MOS transistor Tj16, an output end of the first receiving amplifier Tj15 is used as a receiving output port Tj13, a drain electrode of the first transmitting N-type MOS transistor Tj16 is electrically connected to a drain electrode of the second transmitting N-type MOS transistor Tj17, a gate electrode of the first transmitting N-type MOS transistor Tj16 is electrically connected to a gate electrode of the second transmitting N-type MOS transistor Tj17, and an output end of the first receiving N-type MOS transistor Tj15 is used as a negative input port Tj12. Further, the positive input port Tj11 of the first communication interface is electrically connected to the first electrode YD1, the 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 transmitting output port Tj14 are respectively connected to the communication control interface module Tj3, which is used for controlling the bidirectional communication, and receiving and transmitting communication signals. The positive input port Tj21 of the second communication interface Tj2 is electrically connected to the second electrode YD2, the negative input port Tj22 of the second communication interface Tj2 is electrically connected to the first electrode YD1, and the receiving output port Tj23 and the transmitting output port Tj24 are respectively connected to the communication control interface module Tj3. Since the second communication interface Tj2 and the first communication interface Tj1 have the same internal composition, the 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 to the external positive voltage (corresponding to the second electrode being connected to the external negative voltage or grounded), or the second electrode is connected to the external positive voltage (corresponding to the first electrode being connected to the external negative voltage or grounded), one communication interface can work normally, and the other communication interface is disconnected from use and does not affect the working communication interface.

Further, in fig. 3, the safety circuit in the cartridge further includes a safety algorithm engine unit AD22, a verification state latch unit AD23, and a booster circuit unit AD24, in addition to the aforementioned signal receiving and transmitting unit AD 21.

Specifically, the signal receiving/transmitting unit AD21 is electrically connected to the first electrode and the second electrode, whereby bidirectional communication with the controller in the tobacco rod, that is, transmission and reception of signals can be achieved.

The security algorithm engine unit AD22 is used for analyzing the information content from the controller in the tobacco stem, and correspondingly sending a secret key to the controller after analyzing the agreement conforming to the two parties so that the controller can identify the secret key of the engine unit.

Further, when the controller analyzes that the identification key is correct, a valid command is sent to the engine unit, the engine unit generates a turn-on control signal, otherwise, if the controller analyzes that the identification key is incorrect, an invalid command is sent to the engine unit, and the controller generates a turn-off control signal.

The verification state latch unit AD23 latches an on control signal or an 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 isolation circuit to perform on or off control on the isolation circuit.

The boost circuit unit AD24 boosts the control signal output by the verification state latch unit AD23, so that the gate voltages of the two N-type MOS transistors in the isolation circuit are high enough to generate a large enough voltage difference between the gates and the sources of the two N-type MOS transistors when the key is valid, so that the sources and the drains of the two N-type MOS transistors can be conducted, which can be referred to the description of fig. 3.

With continued reference to fig. 3, the safety circuit further includes an internal power supply AD3, which is a first implementation of the circuit of the internal power supply AD3, and includes a first diode AD31, a second diode AD32, a third diode AD33, a fourth diode AD34, and a power supply capacitor AD35, where the anode of the first diode AD31 is electrically connected to the first electrode YD1, and the cathode of the first diode AD31 is electrically connected to the cathode of the second diode AD32, and the connection is used as a positive voltage output terminal for supplying power to the safety circuit inside the cartridge, and is electrically connected to the power supply capacitor AD35 and then to ground, the anode of the second diode AD32 is electrically connected to the second electrode YD2, the anode of the third diode AD33 is grounded, and simultaneously is electrically connected to the anode of the fourth diode AD34, and the cathode of the third diode AD33 is electrically connected to the anode of the first diode AD1, and simultaneously is electrically connected to the anode of the first electrode YD1, and the cathode of the fourth diode AD34 is electrically connected to the anode of the second diode AD32 and simultaneously is electrically connected to the second electrode YD2. Preferably, the connection positions of the first electrode and the second electrode may be interchanged here, because of symmetry of the circuit composition.

It can be seen that when the first electrode is connected to a positive voltage and the corresponding second electrode is grounded, the first diode AD31 and the fourth diode AD34 are turned on, the second diode AD32 and the third diode AD33 are turned off, and the voltage of the internal power supply is the voltage input from the outside minus the PN on voltage of the first diode AD31 and the PN on voltage of the fourth diode AD34, and then the voltage drops are left. Similarly, when the first electrode is grounded and the second electrode is connected to a positive voltage, the second diode AD32 and the third diode AD33 are turned on, the first diode AD31 and the fourth diode AD34 are turned off, and the voltage of the internal power supply is a voltage drop value obtained by subtracting the PN on voltage of the second diode AD32 and the PN on voltage of the third diode AD33 from the externally inputted positive voltage.

Further, referring to fig. 6, there is a second implementation manner for the internal power supply, that is, a polarity conversion circuit is disposed between the first electrode and the second electrode, through which the only output of the positive and negative polarities of the power supply can be achieved, that is, the positive and negative polarities of the output after passing through the polarity conversion circuit are determined and unique no matter how the first electrode and the second electrode are connected to the positive and negative polarities of the external voltage. Fig. 5 includes a first 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 tube P1 is electrically connected with the grid electrode of the first N type MOS tube N1 and used as a first grid electrode connecting 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 used as a second grid electrode connecting point G2; the source electrode of the first P type MOS tube P1 is electrically connected with the drain electrode of the first N type MOS tube N1 and used as a first drain electrode connecting point D1; the source electrode of the second P type MOS tube P2 is electrically connected with the drain electrode of the second N type MOS tube N2 and used as a second drain electrode connecting point D2; the drain electrode of the first P-type MOS tube P1 is electrically connected with the drain electrode of the second P-type MOS tube P2 and is used as the positive electrode output end DC+ 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 electrode output end DC-of the polarity conversion circuit; the first electrode YD1 is electrically connected to the first drain connection point D1 and the second gate connection point G2, and the second electrode YD2 is electrically connected to the second drain connection point D2 and the first gate connection point G1.

As can be seen, when the first electrode YD1 inputs a positive voltage, the second electrode YD2 is grounded, and a negative voltage 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, and the positive voltage input through the first electrode YD1 reaches the positive output terminal dc+ 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 electrode and the source electrode of the second P-type MOS tube P2 are cut off, the drain electrode and the source electrode of the second N-type MOS tube N2 are conducted, and the second electrode YD2 is grounded, so that the negative electrode output end DC-grounding of the polarity conversion circuit is achieved. When the first electrode YD1 is grounded and the second electrode YD2 inputs a positive voltage, a negative voltage difference is formed between the grid electrode and the source electrode of the second P-type MOS tube P2, so that the drain electrode and the source electrode of the second P-type MOS tube P2 are conducted, the positive voltage input through the second electrode YD2 reaches the positive output end DC+ of the polarity conversion circuit, and the drain electrode and the source electrode of the second N-type MOS tube N2 are cut off; meanwhile, the drain electrode and the source electrode of the first P-type MOS tube P1 are cut off, the drain electrode and the source electrode of the first N-type MOS tube N1 are conducted, and the negative electrode output end DC-grounding of the polarity conversion circuit is grounded through the first electrode YD 1.

Based on the same conception, in combination with the foregoing, the present invention also provides a cartridge embodiment for an electronic cigarette, the cartridge further comprising a first electrode, a second electrode and a safety circuit, the safety circuit comprising an isolation circuit and a control module for controlling on or off of a power supply loop of an atomizer; the control module externally transmits signals through the first electrode or the second electrode and performs key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with a power supply loop of the atomizer; and the control module controls the isolation circuit to disconnect the power supply loop of the atomizer.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation N-type MOS tube, wherein a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with a first electrode, a second input end of the comparator is electrically connected with a second electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with an AD12 grid electrode of the second control MOS tube after passing through an NOT gate, the first control MOS tube and the second control MOS tube are both N-type MOS tubes, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation N-type MOS tube, the drain electrode of the second control MOS tube is electrically connected with a source electrode of the isolation N-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N-type MOS tube.

Based on the same conception and in combination with the foregoing, the present invention also provides a safety circuit embodiment, where the safety circuit includes an isolation circuit and a control module, and the control module performs key verification on an external transmission signal; the key verification is effective, and the control module controls the isolation circuit to be conducted; and the control module controls the isolation circuit to be disconnected.

Preferably, the isolation circuit comprises a first control MOS tube, a second control MOS tube, a comparator and an isolation N-type MOS tube, wherein a first input end of the comparator is externally connected with one electrode, and a second input end of the comparator is externally connected with the other electrode. The two electrodes are a pair of externally powered electrodes, equivalent to the first and second electrodes described previously. The output end of the comparator is divided into two paths, one path of output is directly and electrically connected with the grid electrode of the first control MOS tube, the other path of output is electrically connected with the grid electrode of the second control MOS tube AD12 after passing through the NOT gate, the first control MOS tube and the second control MOS tube are both N-type MOS tubes, the sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with the drain electrode of the isolation N-type MOS tube, the drain electrode of the first control MOS tube is electrically connected with the drain electrode of the isolation N-type MOS tube, the drain electrode of the second control MOS tube is electrically connected with the source electrode of the isolation N-type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N-type MOS tube.

Preferably, the safety circuit further comprises an internal power supply, the internal power supply comprises a first diode, a second diode, a third diode, a fourth diode and a power supply capacitor, wherein the anode of the first diode is used as a first power supply access end, the cathode of the first diode is electrically connected with the cathode of the second diode, the junction is used as a positive voltage output end for supplying power to the safety circuit, the junction is further electrically connected with the power supply capacitor and then grounded, the anode of the second diode is used as a second power supply access end, the anode of the third diode is grounded and is also electrically connected with the anode of the fourth diode to be grounded, the cathode of the third diode is electrically connected with the anode of the first diode and is also electrically connected with the first power supply access end, and the cathode of the fourth diode is electrically connected with the anode of the second diode and is also electrically connected with the second power supply access end;

preferably, the internal power supply comprises a first P-type MOS tube, a second P-type MOS tube, a first N-type MOS tube and a second N-type MOS tube; 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode output end of the internal power supply; 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 electrode output end of the internal power supply; the first drain connection point and the second gate connection point are electrically connected as a first power supply access terminal, and the second drain connection point and the first gate connection point are electrically connected as a second power supply access terminal.

In the mode, the invention discloses the electronic cigarette, the cigarette cartridge and the safety circuit. The cigarette stem 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 an isolation circuit and a control module; when the cigarette rod is connected with the cigarette bullet, the positive driving electrode and the negative driving electrode are electrically connected with the first electrode and the second electrode or are electrically connected with the second electrode and the first electrode; after the tobacco stem is connected with the tobacco cartridge, a signal transmission channel is formed by connecting a first electrode or a second electrode with a positive driving electrode of the tobacco stem, and a signal is transmitted between a controller in the tobacco stem and a control module in the tobacco cartridge for key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with the power supply loop of the atomizer; the key verification is invalid, and the control module controls the isolation circuit to disconnect the power supply loop of the atomizer. From this cigarette bullet and tobacco stem can connect at will, multiplexing same interface prevents fake bad cigarette bullet, simple structure, compatible current electron cigarette.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims

1. The electronic cigarette comprises a cigarette rod and a cigarette bullet, and is characterized in that the cigarette rod comprises a positive driving electrode and a negative driving electrode, the cigarette bullet comprises an atomizer, a first electrode, a second electrode and a safety circuit, and the safety circuit comprises an isolation circuit and a control module, wherein the isolation circuit is used for controlling the connection or disconnection of a power supply loop of the atomizer; when the cigarette rod is correspondingly connected with the cigarette bullet for use, the positive driving electrode and the negative driving electrode of the cigarette rod are correspondingly connected with the first electrode and the second electrode of the cigarette bullet in an electric contact way respectively, or are correspondingly connected with the second electrode and the first electrode of the cigarette bullet in an electric contact way respectively; after the tobacco stem is correspondingly connected with the tobacco cartridge, a signal transmission channel is formed by connecting a first electrode or a second electrode of the tobacco cartridge with a positive driving electrode of the tobacco stem, and a signal is transmitted between a controller in the tobacco stem and a control module in the tobacco cartridge for key verification; the key verification is effective, the control module controls the isolation circuit to be connected with the power supply loop of the atomizer, the key verification is ineffective, and the control module controls the isolation circuit to be disconnected with the power supply loop of the atomizer;

The isolation circuit comprises a first control MOS tube, a second control MOS tube and an isolation type MOS tube, wherein one end of the first control MOS tube is connected with one end of the isolation type MOS tube, one end of the second control MOS tube is connected with the other end of the isolation type MOS tube, the other end of the first control MOS tube and the other end of the second control MOS tube are both connected with a substrate of the isolation type MOS tube, one end of the isolation type MOS tube is connected with the atomizer, the other end of the isolation type MOS tube is connected with a first electrode or a second electrode, a grid electrode of the isolation type MOS tube is connected with the control module, key verification is effective, the control module controls the isolation type MOS tube to be conducted so that a power supply loop of the atomizer is connected, key verification is ineffective, and the control module controls the isolation type MOS tube to be cut off so that the power supply loop of the atomizer is disconnected.

2. The electronic cigarette according to claim 1, wherein the isolation type MOS tube is an isolation N type MOS tube, the isolation circuit further comprises a comparator, a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through the NOT gate, sources of the first control MOS tube and the second control MOS tube are all N type MOS tubes, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation N type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a source electrode of the isolation N type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N type MOS tube.

3. The electronic cigarette according to claim 1, wherein the isolation type MOS tube is an isolation P type MOS tube, the isolation circuit further comprises a comparator, a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through the NOT gate, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation P type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a drain electrode of the isolation P type MOS tube, a drain electrode of the second control MOS tube is electrically connected with a source electrode of the isolation P type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation P type MOS tube.

4. The electronic cigarette of claim 1, wherein the cartridge further comprises an internal power source electrically connected to the first electrode and the second electrode for powering the safety circuit.

5. The electronic cigarette of claim 4, wherein the internal power source comprises a first diode, a second diode, a third diode, a fourth diode, and a power supply capacitor, wherein the anode of the first diode is electrically connected to the first electrode, and the cathode of the first diode is electrically connected to the cathode of the second diode, the junction being a positive voltage output for supplying power to the safety circuit, the junction being further electrically connected to the power supply capacitor and then to ground, the anode of the second diode being electrically connected to the second electrode, the anode of the third diode being grounded while also electrically connected to the anode of the fourth diode and to ground, the cathode of the third diode being electrically connected to the anode of the first diode while also being electrically connected to the first electrode, and the cathode of the fourth diode being electrically connected to the anode of the second diode while also being electrically connected to the second electrode.

6. The electronic cigarette of claim 4, wherein the internal power supply comprises a polarity conversion circuit disposed between the first electrode and the second electrode, the polarity conversion circuit comprising 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode 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 electrode output end of the polarity conversion circuit; the first electrode is electrically connected to the first drain connection point and the second gate connection point, and the second electrode is electrically connected to the second drain connection point and the first gate connection point.

7. The electronic cigarette according to claim 2, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a boost circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode and is used for transmitting signals between the signal receiving and transmitting unit and the controller in the tobacco stem, the safety algorithm engine unit is used for carrying out key identification on information content from the controller in the tobacco stem and correspondingly generating a connection control signal or a disconnection control signal to cause the verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit, and the boosting circuit unit is used for boosting the control signal which is output by the verification state latching unit.

8. The electronic cigarette according to claim 3, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latching unit and a negative pressure circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode and is used for transmitting signals between the signal receiving and transmitting unit and the controller in the tobacco stem, the safety algorithm engine unit is used for carrying out key identification on information content from the controller in the tobacco stem and correspondingly generating a connection control signal or a disconnection control signal to cause the verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the safety algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure on the control signal which is output by the verification state latching unit.

9. The electronic cigarette according to any one of claims 1 to 8, wherein the interior of the cigarette stem further comprises a battery, a second switching tube and an atomization driver, the positive electrode of the battery is electrically connected with a first pin of the second switching tube, the positive driving electrode is electrically connected with a second pin of the second switching tube, a control pin of the second switching tube is electrically connected with an output pin of the atomization driver, the negative electrode of the battery is electrically connected with the negative driving electrode, and the controller is also electrically connected with the atomization driver and the positive driving electrode respectively; after the tobacco stem is correspondingly connected with the tobacco bullet, the controller of the tobacco stem is connected with the first electrode through the positive driving electrode, or is connected with the second electrode through the positive driving electrode, and receives and transmits signals between the tobacco stem and the control module, and performs key verification, wherein the controller of the tobacco stem controls the atomization driver to output effective enabling signals to the second switching tube, a first pin and a second pin of the second switching tube are communicated, and then a battery supplies power to two ends of the atomizer; and if the key verification is invalid, the controller of the tobacco stem controls the atomization driver to output an invalid enabling signal to the second switching tube, the first pin and the second pin of the second switching tube are disconnected, and then the battery is disconnected to supply power to two ends of the atomizer.

10. 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 an isolation circuit and a control module for controlling the on or off of a power supply loop of the atomizer; the control module externally transmits signals through the first electrode or the second electrode and performs key verification; the key verification is effective, and the control module controls the isolation circuit to be connected with a power supply loop of the atomizer; the key verification is invalid, and the control module controls the isolation circuit to disconnect a power supply loop of the atomizer;

11. The cartridge for electronic cigarette according to claim 10, wherein the isolation type MOS tube is an isolation N type MOS tube, the isolation circuit further comprises a comparator, a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through the NOT gate, sources of the first control MOS tube and the second control MOS tube are both N type MOS tubes, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation N type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a source electrode of the isolation N type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation N type MOS tube.

12. The cartridge for electronic cigarette according to claim 10, wherein the isolation type MOS tube is an isolation P type MOS tube, the isolation circuit further comprises a comparator, a first input end of the comparator is electrically connected with one power supply end of the atomizer, the other power supply end of the atomizer is electrically connected with the first electrode, a second input end of the comparator is electrically connected with the second electrode, an output end of the comparator is divided into two paths, one path of output is directly electrically connected with a grid electrode of the first control MOS tube, the other path of output is electrically connected with a grid electrode of the second control MOS tube after passing through the NOT gate, sources of the first control MOS tube and the second control MOS tube are electrically connected with each other and are electrically connected with a drain electrode of the isolation P type MOS tube, a drain electrode of the first control MOS tube is electrically connected with a drain electrode of the isolation P type MOS tube, and the control module outputs a control signal to the grid electrode of the isolation P type MOS tube.

13. The cartridge for an electronic cigarette of claim 10, further comprising an internal power source electrically connected to the first electrode and the second electrode for powering the safety circuit.

14. The cartridge for an electronic cigarette according to claim 13, wherein the internal power source comprises a first diode, a second diode, a third diode, a fourth diode, and a power supply capacitor, wherein the anode of the first diode is electrically connected to the first electrode, and the cathode of the first diode is electrically connected to the cathode of the second diode, the connection being a positive voltage output for supplying power to the safety circuit, the connection being further electrically connected to the power supply capacitor and then to ground, the anode of the second diode being electrically connected to the second electrode, the anode of the third diode being grounded while also being electrically connected to the anode of the fourth diode and to ground, the cathode of the third diode being electrically connected to the anode of the first diode while also being electrically connected to the first electrode, and the cathode of the fourth diode being electrically connected to the anode of the second diode while also being electrically connected to the second electrode.

15. The cartridge for an electronic cigarette of claim 13, wherein the internal power supply comprises a polarity conversion circuit disposed between the first electrode and the second electrode, the polarity conversion circuit comprising 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode 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 electrode output end of the polarity conversion circuit; the first electrode is electrically connected to the first drain connection point and the second gate connection point, and the second electrode is electrically connected to the second drain connection point and the first gate connection point.

16. The cartridge for an electronic cigarette according to claim 11, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latch unit and a boost circuit unit electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode, is used for externally transmitting signals, is used for key identification, correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal generated and output by the security algorithm engine unit, and the boosting circuit unit boosts the control signal output by the verification state latching unit.

17. The cartridge for an electronic cigarette according to claim 12, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, a verification state latch unit and a negative pressure circuit unit which are electrically connected in sequence; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode, is used for externally transmitting signals, is used for key identification, correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal generated and output by the security algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure to the control signal output by the verification state latching unit.

18. The safety circuit is characterized by comprising an isolation circuit and a control module, wherein the control module performs key verification on an external transmission signal; the key verification is effective, and the control module controls the isolation circuit to be conducted; the key verification is invalid, and the control module controls the isolation circuit to be disconnected;

the isolation circuit comprises a first control MOS tube, a second control MOS tube and an isolation type MOS tube, one end of the first control MOS tube is connected with one end of the isolation type MOS tube, one end of the second control MOS tube is connected with the other end of the isolation type MOS tube, the other end of the first control MOS tube and the other end of the second control MOS tube are connected with a substrate of the isolation type MOS tube, a grid electrode of the isolation type MOS tube is connected with a control module, key verification is effective, the control module controls the isolation type MOS tube to be conducted so that the isolation circuit is conducted, key verification is ineffective, and the control module controls the isolation type MOS tube to be cut off so that the isolation circuit is disconnected.

19. The safety circuit of claim 18, wherein the isolation type MOS transistor is an isolation N type MOS transistor, the isolation circuit comprises a comparator, a first input end of the comparator is externally connected with one electrode, a second input end of the comparator is externally connected with the other electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS transistor, the other path of output is electrically connected with a grid electrode of the second control MOS transistor after passing through a NOT gate, sources of the first control MOS transistor and the second control MOS transistor are both N type MOS transistors, sources of the first control MOS transistor and the second control MOS transistor are electrically connected with each other and are electrically connected with a drain electrode of the isolation N type MOS transistor, a drain electrode of the first control MOS transistor is electrically connected with a drain electrode of the isolation N type MOS transistor, and the control module outputs a control signal to the grid electrode of the isolation N type MOS transistor.

20. The safety circuit of claim 18, wherein the isolation type MOS transistor is an isolation P type MOS transistor, the isolation circuit further comprises a comparator, a first input end of the comparator is externally connected with one electrode, a second input end of the comparator is externally connected with the other electrode, an output end of the comparator is divided into two paths, one path of output is directly and electrically connected with a grid electrode of the first control MOS transistor, the other path of output is electrically connected with a grid electrode of the second control MOS transistor after passing through the NOT gate, the sources of the first control MOS transistor and the second control MOS transistor are both P type MOS transistors, the sources of the first control MOS transistor and the second control MOS transistor are electrically connected with each other and are electrically connected with a drain electrode of the isolation P type MOS transistor, the drain electrode of the first control MOS transistor is electrically connected with the drain electrode of the isolation P type MOS transistor, and the control module outputs a control signal to the grid electrode of the isolation P type MOS transistor.

21. The safety circuit of claim 18, further comprising an internal power supply including a first diode, a second diode, a third diode, a fourth diode, and a supply capacitor, wherein the anode of the first diode is connected as a first power supply access terminal, and the cathode of the first diode is electrically connected to the cathode of the second diode, the connection is used as a positive voltage output terminal for supplying power to the safety circuit, the connection is further electrically connected to the supply capacitor and then to ground, the anode of the second diode is used as a second power supply access terminal, the anode of the third diode is grounded and also electrically connected to the anode of the fourth diode and to ground, the cathode of the third diode is electrically connected to the anode of the first diode and also electrically connected to the first power supply access terminal, and the cathode of the fourth diode is electrically connected to the anode of the second diode and also electrically connected to the second power supply access terminal;

Or the internal power supply comprises a first P-type MOS tube, a second P-type MOS tube, a first N-type MOS tube and a second N-type MOS tube; 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 used as a first grid electrode connecting 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 used as a second grid electrode connecting 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 used as a first drain electrode connecting 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 used as a second drain electrode connecting 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 positive electrode output end of the internal power supply; 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 electrode output end of the internal power supply; the first drain connection point and the second gate connection point are electrically connected as a first power supply access terminal, and the second drain connection point and the first gate connection point are electrically connected as a second power supply access terminal.

22. The safety circuit according to claim 19, wherein the control module comprises a signal receiving and transmitting unit, a safety algorithm engine unit, a verification state latch unit and a boost circuit unit electrically connected in this order; the signal receiving and transmitting unit is used for externally transmitting signals, the security algorithm engine unit is used for key identification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the security algorithm engine unit, and the boosting circuit unit boosts the control signal which is output by the verification state latching unit.

23. The safety circuit according to claim 20, wherein the control module comprises a signal receiving and transmitting unit, a safety algorithm engine unit, a verification state latch unit and a negative-pressure circuit unit electrically connected in this order; the signal receiving and transmitting unit is used for externally transmitting signals, the security algorithm engine unit is used for key identification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, the verification state latching unit latches the connection control signal or the disconnection control signal which is generated and output by the security algorithm engine unit, and the negative pressure circuit unit correspondingly generates negative pressure for the control signal which is output by the verification state latching unit.