CN112056626B

CN112056626B - Electronic cigarette, and cartridge and safety circuit for electronic cigarette

Info

Publication number: CN112056626B
Application number: CN202011074488.4A
Authority: CN
Inventors: 宋利军; 肖春兰
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2023-08-01
Anticipated expiration: 2040-10-09
Also published as: CN112056626A

Abstract

The invention discloses a cartridge and a safety circuit for an electronic cigarette. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode; when the cigarette rod is connected with the cigarette bullet, the positive and negative driving electrodes are electrically connected with the first and second electrodes at random; the first electrode or the second electrode of the cigarette cartridge is connected with the positive driving electrode of the cigarette rod to form a transmission channel, and a controller in the cigarette rod performs key verification with a control module in the cigarette cartridge; the verification is effective, the control module controls the two power supply ends of the atomizer in the cigarette bullet to be respectively connected with the first electrode and the second electrode, the verification is ineffective, and the control module controls the two power supply ends of the atomizer to be respectively disconnected with the first electrode and the second electrode. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette bullet through the mode, and the same interface is multiplexed to realize signal transmission and power supply, so that the fake and inferior cigarette bullet is prevented, the structure is simple, and the cigarette is compatible with the existing electronic 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.

In addition, when the cartridge and the tobacco stem of the electronic cigarette are connected, two electrodes of the cartridge can be divided into two cases of distinguishing power polarity and distinguishing no power polarity, and the two cases need to be treated differently.

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 a control module; 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 transmission channel formed by connecting a first electrode or a second electrode of the tobacco cartridge with a positive driving electrode of the tobacco stem is used for key verification, and a controller in the tobacco stem is used for transmitting signals with a control module in the tobacco cartridge; the key verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer to be connected, the key verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected.

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

Preferably, 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 conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as a negative electrode conversion output end of the polarity conversion circuit; the first conversion input end is electrically connected with the first drain electrode connecting point and the second grid electrode connecting point, and the second conversion input end is electrically connected with the second drain electrode connecting point and the first grid electrode connecting point.

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

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

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit and a verification state latching 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 verification on information content from the controller in the tobacco stem and correspondingly generating a verification state latching unit which is used for latching the output on control signal or the output off control signal generated by the safety algorithm engine unit and outputting and controlling the on or off of a power supply loop of the atomizer.

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

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

Preferably, the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit and a verification state latching 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 carrying out signal transmission to the outside, the security algorithm engine unit is used for key verification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, and 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 outputs and controls the connection or disconnection of a power supply loop of the atomizer.

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

Preferably, the safety circuit comprises a polarity conversion circuit, the polarity conversion circuit comprises a first conversion input end and a second conversion input end, and two conversion output ends of the polarity conversion circuit are respectively a positive electrode conversion output end and a negative electrode conversion output end correspondingly; the control pin of the first switching tube is electrically connected with the control end of the control module, the control end of the control module outputs a connection control signal, then the first pin of the first switching tube is connected with the second pin, the control end of the control module outputs a disconnection control signal, and then the first pin of the first switching tube is disconnected with the second pin.

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

The invention has the technical effects that: the invention discloses an electronic cigarette, a cartridge for the electronic cigarette and a safety circuit. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode which do not distinguish positive and negative polarities of the electrodes; when the cigarette rod is connected with the cigarette bullet, the positive and negative driving electrodes are electrically connected with the first and second electrodes at random; the first electrode or the second electrode of the cigarette cartridge is connected with the positive driving electrode of the cigarette rod to form a transmission channel, and a controller in the cigarette rod performs key verification with a control module in the cigarette cartridge; the verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer in the cigarette bullet to be connected, the verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette bullet through the mode, and the same interface is multiplexed to realize signal transmission and power supply, so that the fake and inferior cigarette bullet is prevented, the structure is simple, and the cigarette is compatible with the existing electronic 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 a signal receiving-transmitting unit in an embodiment of a cartridge in an electronic cigarette according to the present invention;

fig. 5 is a schematic diagram of a polarity switching circuit 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 an atomizer YD3, a first electrode YD1, a second electrode YD2 and a safety circuit, and the safety circuit comprises a control module AD2; when the cigarette rod is correspondingly connected with the cigarette bullet for use, the positive driving electrode YG1 and the negative driving electrode YG2 of the cigarette rod are correspondingly connected with the first electrode YD1 and the second electrode YD2 of the cigarette bullet respectively in an electric contact manner, or are correspondingly connected with the second electrode YD2 and the first electrode YD1 of the cigarette bullet respectively in an electric contact manner; after the tobacco stem is correspondingly connected with the tobacco cartridge, a transmission channel is formed by connecting a first electrode YD1 or a second electrode YD2 of the tobacco cartridge with a positive driving electrode YG1 of the tobacco stem, and a controller YG3 in the tobacco stem and a control module AD2 in the tobacco cartridge transmit signals to carry out key verification; the key verification is effective, the control module AD2 controls the power supply loop of the atomizer YD3 to be connected, the key verification is ineffective, and the control module AD2 controls the power supply loop of the atomizer YD3 to be disconnected.

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.

Further, in fig. 1, the safety circuit includes a polarity conversion circuit AD1, the polarity conversion circuit AD1 is disposed between the first electrode YD1 and the second electrode YD2, and the control module AD2 and the atomizer YD3, the polarity conversion circuit AD1 includes a first conversion input end AD11 and a second conversion input end AD12, the first conversion input end AD11 is correspondingly connected to the first electrode or the second electrode, and the second conversion input end AD12 is correspondingly connected to the second electrode or the first electrode. Here, the first electrode and the second electrode are connected externally without distinguishing positive and negative polarities, so that the two conversion input ends of the polarity conversion circuit can randomly select corresponding connection without distinguishing positive and negative polarities for the connected external power supply. The two conversion output ends of the polarity conversion circuit have positive and negative polarity divisions, and the two conversion output ends of the polarity conversion circuit are respectively corresponding to the positive conversion output end AD13 and the negative conversion output end AD14.

Further, as shown in fig. 1, the safety circuit further includes a first switching tube AD3, a first pin of the first switching tube AD3 is electrically connected to a negative electrode conversion output end AD14 of the polarity conversion circuit AD1, a second pin of the first switching tube AD3 is electrically connected to a first power supply end of the atomizer YD3, a control pin of the first switching tube AD3 is electrically connected to a control end of the control module AD2, and a second power supply end of the atomizer YD3 is electrically connected to a positive electrode conversion output end AD13; the control end of the control module AD2 outputs a switch-on control signal, the first pin and the second pin of the first switch tube AD3 are switched on, and the power supply loops of the two power supply ends of the atomizer YD3 are switched on; the control end of the control module AD2 outputs a disconnection control signal, and then the first pin and the second pin of the first switch tube AD3 are disconnected, and then the power supply loops of the two power supply ends of the atomizer YD3 are disconnected.

In fig. 1, only one arrangement of the atomizer and the first switching tube is shown, and another equivalent arrangement is shown, which have equivalent technical effects, namely: the safety circuit further comprises a first switch tube AD3, a first pin of the first switch tube AD3 is electrically connected with an anode conversion output end AD13 of the polarity conversion circuit AD1, a second pin of the first switch tube AD3 is electrically connected with a second power supply end of the atomizer YD3, a control pin of the first switch tube AD3 is electrically connected with a control end of the control module AD2, and a first power supply end of the atomizer YD3 is electrically connected with a cathode conversion output end AD14; the control end of the control module AD2 outputs a switch-on control signal, the first pin and the second pin of the first switch tube AD3 are switched on, and the power supply loops of the two power supply ends of the atomizer YD3 are switched on; the control end of the control module AD2 outputs a disconnection control signal, and then the first pin and the second pin of the first switch tube AD3 are disconnected, and then the power supply loops of the two power supply ends of the atomizer YD3 are disconnected.

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

Here, the first electrode and the second electrode do not distinguish between positive and negative polarities of the electrodes, and when the first electrode and the second electrode are connected to the positive driving electrode and the negative driving electrode, the first electrode may be connected to the positive driving electrode, the second electrode may be connected to the negative driving electrode, the first electrode may be connected to the negative driving electrode, and the second electrode may be connected to the positive driving electrode. Therefore, when the cartridge is connected with the cigarette stem, the polarity of the power supply correspondingly connected with the first electrode and the second electrode does not need to be distinguished. So that the safety and compatibility of the use of the cartridge will be higher.

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. After the cigarette is held by the latch, the cigarette bullet is connected with the cigarette stem, and when the key verification is effective, the cigarette bullet can be always in the latch on state, so that the on state can be kept without the safety circuit supplying power all the time, and the power consumption of the safety circuit is saved.

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

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 safety anti-counterfeiting purpose can be realized only by improving the circuits 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 double MOS tube 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, on the basis of fig. 1, fig. 3 shows the detailed composition of the safety circuit in the cartridge. The same parts as those shown in fig. 1 will not be described again.

In fig. 3, the security circuit includes a signal receiving/transmitting unit AD21, a security algorithm engine unit AD22, and a verification state latch unit AD23. These units may be considered as internal constituent units of the control module AD 2.

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 first switch tube AD3, so as to perform on or off control on the first switch tube AD 3.

Preferably, in fig. 3, the first switching tube AD3 is an N-type MOS tube, the gate of the N-type MOS tube is controlled by a control signal output by the verification state latch unit AD23, the source is connected to the negative electrode conversion output end AD14 and grounded, when the control signal is positive voltage, the N-type MOS tube is turned on, when the control signal is 0 voltage (i.e. grounded), the N-type MOS tube is turned off, the drain is electrically connected to one power supply end of the atomizer YD3, and the other power supply end of the atomizer YD3 is connected to the positive electrode conversion output end AD13. Preferably, the first switching tube AD1 may be a P-type MOS tube, where the gate of the P-type MOS tube is controlled by a control signal output by the verification state latch unit, the source is connected to the negative electrode conversion output end AD14 and grounded, the P-type MOS tube is turned on when the control signal is negative voltage, the P-type MOS tube is turned off when the control signal is 0 voltage (i.e., grounded), the drain is electrically connected to one power supply end of the atomizer YD3, and the other power supply end of the atomizer YD3 is connected to the positive electrode conversion output end AD13.

Preferably, as shown in fig. 3, the safety circuit further includes an internal power supply electrically connected to the positive electrode conversion output terminal AD13, for supplying power to the safety circuit, and the internal power supply AD4 is configured to take power from the outside from the positive electrode conversion output terminal AD13, where the power taking mode includes that when a communication signal from the outside is provided on the positive electrode conversion output terminal AD13, for example, a digital pulse communication signal, power can be obtained from the communication signal, or power can be obtained from the positive electrode of the battery after the external battery is connected to the positive electrode conversion output terminal AD13 for dc power supply. That is, both the power supply through the communication signal and the external battery supply can be used as the external power supply AD4 to take power from the outside, and the power taking sources are all based on the same positive electrode conversion output terminal AD13.

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

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.

Further, referring to fig. 4, the communication interfaces of the signal receiving and transmitting unit include a first communication interface Tj1 and a second communication interface Tj2, which have the same circuit composition, and each include 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, the communication interfaces internally include a first receiving amplifier Tj15, a first transmitting N-type MOS transistor Tj16, and a second transmitting N-type MOS transistor Tj17, an input end of the first receiving amplifier Tj15 is electrically connected with a source electrode of the first transmitting N-type MOS transistor Tj16, the electrical connection point is used as a positive input port Tj11, 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 with 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 with a gate electrode of the second transmitting N-type MOS transistor Tj17, and the electrical connection point 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, referring to fig. 3, the polarity conversion circuit specifically includes a P-type MOS transistor P1, a second P-type MOS transistor P2, a first N-type MOS transistor N1, and a second N-type MOS transistor N2 in fig. 5; 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 conversion output end AD13 of the polarity conversion circuit; the source electrode of the first N-type MOS tube N1 is electrically connected with the source electrode of the second N-type MOS tube N2 and is used as a negative electrode conversion output end AD14 of the polarity conversion circuit; the first conversion input terminal AD11 is electrically connected to the first drain connection point D1 and the second gate connection point G2, and the second conversion input terminal AD12 is electrically connected to the second drain connection point D2 and the first gate connection point G1.

As can be seen, when the first conversion input end AD11 inputs a positive voltage, the second conversion input end AD12 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, the positive voltage input through the first conversion input end AD11 reaches the positive conversion output end AD13 of the polarity conversion circuit, and the drain and the source of the first N-type MOS transistor N1 are turned off; meanwhile, the drain electrode and the source electrode of the second P-type MOS transistor P2 are turned off, the drain electrode and the source electrode of the second N-type MOS transistor N2 are turned on, and the second conversion input end AD12 is grounded, so that the negative conversion output end AD14 of the polarity conversion circuit is grounded. When the first conversion input end AD11 is grounded, the second conversion input end AD12 inputs 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 conversion input end AD12 reaches the positive conversion output end AD13 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 transistor P1 are turned off, the drain electrode and the source electrode of the first N-type MOS transistor N1 are turned on, and are grounded through the first conversion input end AD11, and then the negative conversion output end AD14 of the polarity conversion circuit is grounded. Therefore, the positive and negative polarities of the two conversion output terminals are always kept unchanged regardless of the connection of the positive and negative polarities of the two conversion input terminals.

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

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

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 a first switching tube 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 first switching tube to be conducted; and the control module controls the first switching tube to be disconnected.

It can be seen that the present invention discloses a cartridge and a safety circuit for an electronic cigarette. The cigarette rod of the electronic cigarette comprises a positive driving electrode and a negative driving electrode, and the cigarette cartridge comprises a first electrode and a second electrode which do not distinguish positive and negative polarities of the electrodes; when the cigarette rod is connected with the cigarette bullet, the positive and negative driving electrodes are electrically connected with the first and second electrodes at random; the first electrode or the second electrode of the cigarette cartridge is connected with the positive driving electrode of the cigarette rod to form a transmission channel, and a controller in the cigarette rod performs key verification with a control module in the cigarette cartridge; the verification is effective, the control module controls the power supply loops of the two power supply ends of the atomizer in the cigarette bullet to be connected, the verification is ineffective, and the control module controls the power supply loops of the two power supply ends of the atomizer to be disconnected. The cigarette rod can be connected without distinguishing the electrode polarity of the cigarette bullet through the mode, and the same interface is multiplexed to realize signal transmission and power supply, so that the fake and inferior cigarette bullet is prevented, the structure is simple, and the cigarette is compatible with the existing electronic 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. An electronic cigarette comprises a cigarette rod and a cigarette cartridge, and is characterized in that the cigarette rod comprises a positive driving electrode and a negative driving electrode, the cigarette cartridge comprises an atomizer, a first electrode, a second electrode and a safety circuit, and the safety circuit comprises a control module; when the cigarette rod is correspondingly connected with the cigarette 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 transmission channel formed by connecting a first electrode or a second electrode of the tobacco cartridge with a positive driving electrode of the tobacco stem is used for key verification, and a controller in the tobacco stem is used for transmitting signals with a control module in the tobacco cartridge; the key verification is effective, the control module controls the power supply loop of the atomizer to be connected, the connection state is latched and maintained, the key verification is ineffective, and the control module controls the power supply loop of the atomizer to be disconnected, and the disconnection state is latched and maintained.

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

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

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

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

6. The electronic cigarette according to any one of claims 1 to 5, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit and a verification state latching unit 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 verification on information content from the controller in the tobacco stem and correspondingly generating a verification state latching unit which is used for latching the output on control signal or the output off control signal generated by the safety algorithm engine unit and outputting and controlling the on or off of a power supply loop of the atomizer.

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

if the key verification is effective, the controller of the cigarette rod controls the atomization driver to output an effective enabling signal to the second switching tube, the second pin of the second switching tube is communicated with the first pin, the positive electrode of the battery is communicated with the second power supply end of the atomizer, and the control module in the cigarette cartridge also controls the power supply loop of the atomizer to be communicated; and if the key verification is invalid, the controller of the cigarette rod controls the atomization driver to output an invalid enabling signal to the second switching tube, the second pin of the second switching tube is disconnected with the first pin, the anode of the battery is disconnected with the second power supply end of the atomizer, and the control module in the cigarette cartridge also controls the power supply loop of the atomizer to be disconnected.

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

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

10. The cartridge for an electronic cigarette of claim 9, wherein the polarity conversion circuit comprises a first P-type MOS transistor, a second P-type MOS transistor, a first N-type MOS transistor, and a second N-type MOS transistor; the grid electrode of the first P type MOS tube is electrically connected with the grid electrode of the first N type MOS tube and 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 conversion output end of the polarity conversion circuit; the source electrode of the first N-type MOS tube is electrically connected with the source electrode of the second N-type MOS tube and is used as a negative electrode conversion output end of the polarity conversion circuit; the first conversion input end is electrically connected with the first drain electrode connecting point and the second grid electrode connecting point, and the second conversion input end is electrically connected with the second drain electrode connecting point and the first grid electrode connecting point.

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

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

13. The cartridge for an electronic cigarette according to any one of claims 8 to 12, wherein the control module comprises a signal receiving and transmitting unit, a security algorithm engine unit, and a verification state latching unit electrically connected in this order; the signal receiving and transmitting unit is electrically connected with the first electrode and the second electrode and is used for carrying out signal transmission to the outside, the security algorithm engine unit is used for key verification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, and 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 outputs and controls the connection or disconnection of a power supply loop of the atomizer.

14. The safety circuit is characterized by comprising a first switch tube and a control module, wherein the control module performs key verification on an external transmission signal; the key verification is effective, the control module controls the first switching tube to be conducted, and the on state is latched and maintained; the key verification is invalid, the control module controls the first switching tube to be opened, and the opened state is latched and maintained.

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

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

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

18. The safety circuit according to any one of claims 14 to 17, wherein the control module comprises a signal receiving and transmitting unit, a safety algorithm engine unit and a verification state latch unit electrically connected in this order; the signal receiving and transmitting unit is used for transmitting signals to the outside, the security algorithm engine unit is used for key verification and correspondingly generates a connection control signal or a disconnection control signal to cause a verification state latching unit, and 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.