Resistance-type airflow switch and automatic electronic atomizer
By designing a resistive airflow switch of a first induction plate including a flexible substrate and a piezoresistive film, as well as a second induction plate of a hard substrate and an electrode layer, the problems of low sensitivity and safety hazards of resistance micronecks in traditional electronic atomizers are solved, and higher sensitivity and safety are achieved.
Patent Information
- Application Number
- CN202421789665.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The sensitivity of resistive microphone heads in traditional electronic atomizers is low, and a special airway structure is required to achieve the identification of smaller suction forces, and there are safety hazards such as spontaneous combustion.
A resistive airflow switch is designed, including a first induction plate of a flexible substrate and a piezoresistive film, and a second induction plate of a hard substrate and an electrode layer. By providing a through hole and a waterproof and breathable film, the sensitivity of the microneck is enhanced and the partition layer is avoided by avoiding accidental contact.
In the absence of special airways, the resistive airflow switch can recognize smaller suction forces, improve the sensitivity of the microphone head, reduce the risk of false touch, and enhance the safety and user experience of the electronic atomizer.
Smart Images
Figure CN222917035U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic atomizers and e-cigarettes, in particular to a resistive air flow switch and an electronic atomizer. Background Art
[0002] Electronic atomizers can be used in medical inhaled drug delivery treatment and the field of e-cigarettes. Traditional cigarettes directly inhale the smoke after the tobacco leaves are lit, which is more harmful to human health. As an alternative to traditional cigarettes, e-cigarettes heat and atomize the nicotine-containing e-liquid, and users inhale the atomized e-liquid, reducing the impact of smoking on human health.
[0003] In order to enhance the user experience, traditional electronic atomizers simulate the suction process. To achieve the above effect, a capacitive microphone is installed in the electronic atomizer to detect the user's suction. When the user inhales, the air flow enters the capacitive microphone through the airway of the electronic atomizer, generating a certain pressure on the diaphragm of the capacitive microphone, causing the diaphragm to vibrate, changing the distance between the back plate and the diaphragm, resulting in a change in the capacitance value of the capacitive microphone. Then, through the ASIC chip, the above capacitance value change is converted into an electrical signal to trigger the control circuit of the electronic atomizer to realize the timely heating and atomization of the liquid medicine or e-liquid. Different suction forces generate different electrical signals, thereby changing the heating efficiency of the electronic atomizer and realizing the simulation of the suction process.
[0004] However, the microphone of traditional electronic atomizers is greatly affected by environmental factors such as air humidity and particle size. When the air humidity is high and the electronic atomizer is not cleaned in time after long-term use, rust is likely to occur inside the microphone and the liquid medicine or e-liquid accumulates, causing the microphone to short-circuit, increasing the risk of accidental touch of the microphone, and easily resulting in the self-ignition phenomenon of the electronic atomizer, with a relatively large potential safety hazard.
[0005] Using a resistive microphone can well solve the problem of easy accidental touch of the capacitive microphone. However, the resistive microphone requires a large deformation of the thin film to output an electrical signal, reducing the sensitivity of the microphone and resulting in a poor user experience. In addition, using a special airway structure can concentrate the suction force on the microphone itself to achieve the purpose of triggering a response with a light suction. However, the specially designed airway structure increases the assembly cost and the complexity of the process. Summary of the Utility Model
[0006] An object of the utility model is to solve the problems of low sensitivity of the resistive microphone and the need for a special airway structure.
[0007] In particular, an embodiment of the present application provides a resistive air flow switch, including:
[0008] A first sensing plate, including a flexible substrate and a piezoresistive thin film disposed on the flexible substrate;
[0009] The second induction plate, including a rigid substrate and an electrode layer disposed on the rigid substrate, the electrode layer being disposed opposite to the piezoresistive film, the second induction plate including a through hole penetrating along its thickness direction, the diameter of the through hole being greater than a first preset value, and a waterproof and breathable film covering one side of the through hole away from the electrode layer; and
[0010] A partition layer, the partition layer being disposed in an edge region between the piezoresistive film and the electrode layer, so as to form a gap between the piezoresistive film and the electrode layer.
[0011] Further, the through hole is two opposite semi-circles, and a strip-shaped region for placing the electrode layer is disposed between the two semi-circles.
[0012] Further, the partition layer is a rubber ring or a double-sided adhesive ring.
[0013] Further, the material of the flexible substrate is PET (polyethylene terephthalate), PI (polyimide) or PEN (polyethylene naphthalate).
[0014] Further, the width of the partition layer is less than a second preset value.
[0015] Further, the flexible substrate has a preset tension less than a third preset value, so that the flexible substrate is in partial contact with the electrode layer.
[0016] In particular, the present utility model further provides an automatic electronic atomizer, including the above-mentioned resistive air flow switch.
[0017] Further, the automatic electronic atomizer includes a mouthpiece, a body portion, and a mounting portion having a receiving cavity connected in sequence, and the resistive air flow switch is mounted in the receiving cavity.
[0018] Further, the body portion includes a housing, a battery, and an atomizer, the atomizer being mounted below the mouthpiece, the battery being disposed at the bottom of the atomizer, a rising air passage being defined between the battery and the housing and between the atomizer and the housing, the resistive air flow switch being electrically connected to the battery and the atomizer; the mounting portion includes an air cavity connected to the rising air passage and an external air passage communicating with the outside, and the through hole communicates with the air cavity and the external air passage.
[0019] The beneficial effects of the present utility model are:
[0020] 1. By setting the diameter of the through-hole to be greater than a first preset value, a large deformation of the first sensing plate can occur even under a small air pressure, enhancing the sensitivity of the resistive airflow switch. This enables the microphone to recognize a small suction force even without a special air duct. By providing a waterproof and breathable film, external water vapor, liquid medicine, e-liquid, or other possible contaminants are prevented from entering the resistive airflow switch, thus affecting its performance.
[0021] 2. The flexible substrate has a preset tension less than a third preset value, ensuring that when the airflow at the through-hole is small, the flexible substrate can still obtain a large deformation, further enhancing the sensitivity of the resistive airflow switch.
[0022] 3. By setting the installation part at the bottom of the automatic electronic atomizer, the path of e-liquid reflux is extended, causing the e-liquid to condense during reflux and preventing the e-liquid from contaminating the resistive airflow switch. By using the resistive airflow switch provided by the present utility model in the electronic atomizer, the sensitivity of the electronic atomizer is improved, and at the same time, the suction process of traditional electronic atomizers is mimicked, enhancing the user experience. Also, by adopting the resistive airflow switch of the present utility model, when the user stops sucking, the first sensing plate separates from the second sensing plate, avoiding the risk of accidental touch of the electronic atomizer and enhancing the safety of using the electronic atomizer. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a cross-sectional view of a resistive airflow switch according to an embodiment of the present utility model;
[0024] Figure 2 is a top view of a first sensing plate according to an embodiment of the present utility model;
[0025] Figure 3 is a bottom view of a second sensing plate according to an embodiment of the present utility model;
[0026] Figure 4 is a schematic structural view of a resistive airflow switch installed in an automatic electronic atomizer according to an embodiment of the present utility model.
[0027] In the figure:
[0028] 100 - Resistive airflow switch; 1 - First sensing plate; 11 - Flexible substrate; 12 - Piezoresistive film; 2 - Second sensing plate; 21 - Rigid substrate; 22 - Electrode layer; 23 - Through-hole; 3 - Waterproof and breathable film; 4 - Isolation layer; 5 - Electronic atomizer; 6 - Mouthpiece; 7 - Body part; 71 - Housing; 72 - Battery; 73 - Atomizer; 74 - Rising air duct; 8 - Installation part; 81 - Accommodation cavity; 82 - Air cavity; 83 - External air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only for explaining the present application and not for limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0030] The terms "including" and "having" in the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.
[0031] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0032] As Figure 1 shown, a resistive airflow switch 100 according to an embodiment of the present invention includes a first sensing plate 1, a second sensing plate 2, and a spacer layer 4. The first sensing plate 1 includes a flexible substrate 11 and a piezoresistive thin film 12 disposed on the flexible substrate 11. The second sensing plate 2 includes a rigid substrate 21 and an electrode layer 22 disposed on the rigid substrate 21, and the electrode layer 22 is disposed opposite to the piezoresistive thin film 12. As Figure 2 shown, the second sensing plate 2 includes a through hole 23 penetrating along its thickness direction, and the diameter of the through hole 23 is greater than a first preset value. To ensure that the first sensing plate 1 can undergo a large deformation under a small airflow. In one embodiment, a relatively large through hole 23 is provided on the second sensing plate 2. The diameter of the through hole 23 is greater than one-half of the diameter of the resistive airflow switch 100. The diameter of the resistive airflow switch 100 is any value from 5 mm to 20 mm. As Figure 1 shown, a waterproof and breathable film 3 covers the side of the through hole 23 away from the electrode layer 22. As Figure 1 shown, the spacer layer 4 is disposed in the edge region between the piezoresistive thin film 12 and the electrode layer 22, so as to form a gap between the piezoresistive thin film 12 and the electrode layer 22.
[0033] When there is airflow passing through the through-hole 23, the gas flow rate at the through-hole 23 is relatively large and the air pressure is relatively small, while the air pressure inside the resistive airflow switch 100 is relatively large. Under the action of the air pressure, the flexible substrate 11 drives the piezoresistive film 12 closer to the second induction plate 2, causing the piezoresistive film 12 to contact the electrode layer 22, and the resistive airflow switch 100 is turned on. When there is no airflow passing through the through-hole 23, under the blocking action of the isolation layer 4, the first induction plate 1 is separated from the second induction plate 2, and the resistive airflow switch 100 is turned off. Moreover, with different magnitudes of airflow at the through-hole 23, the contact area between the first induction plate 1 and the second induction plate 2 is different, the generated resistance value is different, and the output resistance signal is also different.
[0034] In this embodiment, the diameter of the through-hole 23 is set to be greater than the first preset value, which enables the first induction plate 1 to undergo a larger deformation even under a relatively small air pressure, thereby enhancing the sensitivity of the resistive airflow switch 100.
[0035] Furthermore, by providing the waterproof and breathable film 3, it is possible to prevent external water vapor, e-liquid, or other possible contaminants from entering the interior of the resistive airflow switch 100 and affecting its performance.
[0036] In one embodiment, as Figure 3 shown, the through-hole 23 is composed of two opposite semi-circles, and a long strip area for placing the electrode layer 22 is provided between the two semi-circles. The electrode layer 22 is arranged on the long strip area to avoid excessive coverage of the through-hole 23 by the electrode layer 22.
[0037] In one embodiment, the isolation layer 4 is a rubber ring or a double-sided adhesive ring, as well as other materials that do not have electrical conductivity, which will not be elaborated here.
[0038] In one embodiment, the flexible substrate 11 is PET, PI, or PEN.
[0039] In one embodiment, the width of the isolation layer 4 is set to be less than the second preset value, thereby increasing the possible contact area between the piezoresistive film 12 and the electrode layer 22, and further obtaining a larger resistance change range.
[0040] In one embodiment, the flexible substrate 11 has a preset tension less than the third preset value, so that the flexible substrate 11 is in partial contact with the electrode layer 22. When assembling the flexible substrate 11, avoid stretching the flexible substrate 11 tightly, and keep the flexible substrate 11 in a certain degree of relaxation, so that the flexible substrate 11 obtains a smaller tension. This ensures that when the airflow at the through-hole 23 is relatively small, the flexible substrate 11 can also undergo a larger deformation, further enhancing the sensitivity of the resistive airflow switch 100.
[0041] As Figure 4As shown in the figure, the present utility model further provides an automatic electronic atomizer 5, which includes the above-mentioned resistive air flow switch 100. The automatic electronic atomizer 5 includes a mouthpiece 6, a body part 7, and a mounting part 8 having a receiving cavity 81 that are connected in sequence. The resistive air flow switch 100 is installed in the receiving cavity 81.
[0042] When the e-liquid at the mouthpiece 6 flows back, by arranging the mounting part 8 at the bottommost part of the automatic electronic atomizer 5, the path of the e-liquid flowing back is extended, so that the e-liquid condenses during the flowing-back process, avoiding the pollution of the resistive air flow switch 100 by the e-liquid.
[0043] The body part 7 includes a housing 71, a battery 72, and an atomizer 73. The atomizer 73 is installed below the mouthpiece 6, the battery 72 is placed at the bottom of the atomizer 73, and a rising air passage 74 is defined between the battery 72 and the housing 71 and between the atomizer 73 and the housing 71. The resistive air flow switch 100 is electrically connected to the battery 72 and the atomizer 73. The mounting part 8 includes an air cavity 82 connected to the rising air passage 74 and an external air passage 83 communicating with the outside. The through hole 23 communicates with the air cavity 82 and the external air passage 83.
[0044] When the user sucks at the mouthpiece 6, the outside air enters the mounting part 8 through the external air passage 83, causing the resistance value of the resistive air flow switch 100 to change and transmitting the resistance change signal to the atomizer 73. The atomizer 73 atomizes the e-liquid. The air flow of the mounting part 8 enters the rising air passage 74 through the air cavity 82 and enters the mouthpiece 6 through the atomizer 73 for the user to suck.
[0045] When the sucking force at the mouthpiece 6 is relatively large, the contact area between the first induction plate 1 and the second induction plate 2 is large, the resistance of the resistive air flow switch 100 is small, and the current allowed to pass through the resistance value air flow switch also increases, and the heating efficiency of the atomizer 73 is improved; conversely, the adding efficiency of the atomizer 73 is reduced; when the user stops sucking, under the blocking effect of the partition layer 4, the first induction plate 1 and the second induction plate 2 are separated, avoiding the risk of accidental touch of the resistive air flow switch 100, making the use safer, while imitating the process of smoking traditional cigarettes, improving the user experience, and at the same time improving the sensitivity of the automatic electronic atomizer. Even when the sucking force at the mouthpiece of the user is small, the automatic electronic atomizer can be triggered.
[0046] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent should be subject to the appended claims.
Claims
1. A resistive airflow switch, characterized in that: include: A first sensing plate, comprising a flexible substrate and a piezoresistive film disposed on the flexible substrate; A second sensing plate, comprising a hard substrate and an electrode layer disposed on the hard substrate, wherein the electrode layer is disposed opposite to the piezoresistive film, the second sensing plate comprises at least one through hole penetrating along a thickness direction thereof, wherein a diameter of the through hole is greater than a first preset value, and a side of the through hole away from the electrode layer is covered with a waterproof and breathable film; and A partition layer is provided at an edge region of the piezoresistive film and the electrode layer so as to form a gap between the piezoresistive film and the electrode layer.
2. The resistive airflow switch according to claim 1, characterized in that: The through hole is two opposite semicircles, and a long strip area for placing the electrode layer is arranged between the two semicircles.
3. The resistive airflow switch according to claim 1, characterized in that: The isolation layer is a rubber ring or a double-sided adhesive ring.
4. The resistive airflow switch according to claim 1, characterized in that: The material of the flexible substrate is PET, PI or PEN.
5. The resistive airflow switch according to claim 1, characterized in that: The width of the isolation layer is smaller than a second preset value.
6. The resistive airflow switch according to claim 1, characterized in that: The flexible substrate has a preset tension less than a third preset value, so that the flexible substrate is in partial contact with the electrode layer.
7. An automatic electronic atomizer, characterized in that: A resistive airflow switch comprising any one of claims 1 to 6.
8. The automatic electronic atomizer according to claim 7, characterized in that: The invention comprises a suction nozzle, a main body and a mounting part including a receiving cavity which are connected in sequence, and the resistive airflow switch is mounted in the receiving cavity.
9. The automatic electronic atomizer according to claim 8, characterized in that: The main body comprises a shell, a battery, and an atomizer, wherein the atomizer is installed below the mouthpiece, the battery is placed at the bottom of the atomizer, an ascending airway is defined between the battery and the shell and between the atomizer and the shell, and the resistive airflow switch is electrically connected to the battery and the atomizer; The mounting portion comprises an air cavity connected to the ascending airway and an external airway communicating with the outside, and the through hole is communicated with the air cavity and the external airway.