Resistive airflow switch and electronic cigarette

Abstract

The utility model provides a resistive airflow switch and an electronic cigarette. The resistive airflow switch includes a first composite panel, a second composite panel and a spacer layer. The first composite panel includes a finger-inserting electrode located on one side thereof, and the first composite panel also includes a through hole penetrating along its thickness direction; the second composite panel includes a flexible substrate, and a piezoresistive film is partially provided on the side of the flexible substrate facing the finger-inserting electrode; the spacer layer is supported on the edge area between the finger-inserting electrode and the piezoresistive film, so that a gap is formed between the first composite panel and the second composite panel. The resistive airflow switch of the utility model can reduce the Young's modulus of the second composite panel and improve the sensitivity of the resistive airflow switch.

Description

Technical Field

[0001] The utility model relates to the field of electronic cigarettes, and in particular to a resistive airflow switch and an electronic cigarette. Background Art

[0002] In order to detect the user's puffing, current electronic cigarettes usually use a capacitive microphone as a puff detection device, but its performance is easily affected by air humidity and e-liquid.

[0003] To ensure the performance of the suction detection device, a resistive airflow switch can be used. The current resistive airflow switch is composed of two composite panels, the first composite panel includes a hard board substrate and interdigitated electrodes, and the second composite panel includes a flexible substrate, and piezoresistive ink is printed on the entire surface of the flexible substrate to form a piezoresistive film.

[0004] The whole-surface printing method will increase the Young's modulus of the second composite panel. When the user's suction force is small, the deformation of the second composite panel is also small, resulting in insensitive resistance airflow switch. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the second composite panel has a large Young's modulus, resulting in an insensitive resistive airflow switch.

[0006] In particular, the utility model provides a resistive airflow switch, comprising: a first composite panel, a second composite panel and a spacer layer;

[0007] A first composite panel, comprising a finger electrode located on one side thereof, and the first composite panel further comprising a through hole penetrating along a thickness direction thereof;

[0008] The second composite panel comprises a flexible substrate, wherein a piezoresistive film is disposed on a portion of the flexible substrate facing the interdigitating electrode;

[0009] A spacer layer is supported at an edge region between the interdigitating electrode and the piezoresistive film, so that a gap is formed between the first composite panel and the second composite panel.

[0010] Furthermore, the first composite panel further comprises a hard board substrate arranged on a side of the interdigitating electrode away from the piezoresistive film, and the number of the through holes is one or more.

[0011] Furthermore, the spacer layer is a double-sided adhesive or a PET (polyethylene terephthalate) gasket.

[0012] Furthermore, the material of the flexible substrate is PET, PI (polyimide) or PEN (polyethylene naphthalate).

[0013] In particular, the utility model also provides an electronic cigarette, comprising the above-mentioned resistive airflow switch.

[0014] Furthermore, the electronic cigarette comprises a mouthpiece, a main body and a silicone member which are connected in sequence, and the resistive airflow switch is placed in the silicone member.

[0015] Furthermore, the main body is provided with an ascending air duct, one end of which is connected to the suction nozzle; the silicone member is provided with an air cavity, an installation cavity, and a first air duct which is arranged in a tortuous manner, the installation cavity is provided with the resistive airflow switch, the two ends of the first air duct are respectively connected to the through hole of the resistive airflow switch and the air cavity, and the air cavity is also respectively connected to the ascending air duct and the outside.

[0016] Furthermore, the first airway is in a spiral, serpentine, or continuously curved shape.

[0017] Furthermore, the main body includes a shell, an atomizer, and a battery, and an ascending airway is defined between the shell and the battery, and between the shell and the atomizer.

[0018] According to the first aspect of the utility model, the Young's modulus of the second composite panel is reduced by partially setting a piezoresistive film. When the user's suction force is relatively small, the second composite panel will produce a larger deformation, thereby improving the sensitivity of the resistive airflow switch.

[0019] According to the second aspect of the utility model, because the silicone member is arranged at the bottom, the return gas from the mouthpiece needs to pass through the ascending airway to reach the silicone member, which extends the return path of the return gas, so that the smoke oil in the return gas condenses in the ascending airway, avoiding the smoke oil from polluting the resistive airflow switch. At the same time, the first airway is spiral, which further extends the return path of the return gas, avoiding the smoke oil in the return gas from polluting the resistive airflow switch, and ensuring the sensitivity of the resistive airflow switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a resistive airflow switch according to an embodiment of the utility model;

[0021] Figure 2 is a top view of a flexible substrate according to an embodiment of the utility model;

[0022] Figure 3 It is a cross-sectional view of an electronic cigarette according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1- Suction nozzle;

[0025] 2- Atomizer;

[0026] 3-Battery;

[0027] 4- air cavity;

[0028] 5-Silicone parts;

[0029] 6- Shell

[0030] 7- Ascending airway;

[0031] 8-Resistive air flow switch;

[0032] 81- first composite panel;

[0033] 811-hard board base;

[0034] 812- interdigitated electrode;

[0035] 82 - second composite panel;

[0036] 821- Flexible substrate;

[0037] 822-piezoresistive film;

[0038] 83-interval layer;

[0039] 84-through hole;

[0040] 9-First airway;

[0041] 10-installation cavity;

[0042] 11- wire;

[0043] 12-Main body. DETAILED DESCRIPTION

[0044] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0045] Figure 1 is a cross-sectional view of a resistive airflow switch according to an embodiment of the utility model; Figure 2 FIG. 1 is a top view of a flexible substrate according to an embodiment of the present invention. Figure 1As shown, in one embodiment, the resistive airflow switch 8 includes a first composite panel 81, a second composite panel 82 and a spacer layer 83. The first composite panel 81 includes a finger electrode 812 located on one side thereof, and the finger electrode 812 is connected to a power source. The connection method between the finger electrode 812 and the power source adopts a common connection method in the art, which will not be repeated here. The first composite panel 81 also includes a through hole 84 that runs through the thickness direction thereof. In one embodiment, the first composite panel 81 also includes a hard board substrate 811 arranged on a side of the finger electrode 812 away from the piezoresistive film 822, and the number of through holes 84 can be one or more, and the specific number of settings can be freely selected according to actual conditions. The second composite panel 82 includes a flexible substrate 821, and the flexible substrate 821 is partially provided with a piezoresistive film 822 on the side facing the finger electrode 812. The spacer layer 83 is located between the finger electrode 812 and the piezoresistive film 822, and is supported at the edge region between the finger electrode 812 and the piezoresistive film 822, so that a gap is formed between the first composite panel 81 and the second composite panel 82, that is, the finger electrode 812 and the piezoresistive film 822 are not in contact without external force, and the finger electrode 812 is in a normally open state. Figure 2 As shown, the piezoresistive film 822 is partially disposed on the flexible substrate 821. The piezoresistive film 822 of this embodiment is in the shape of an elongated strip and is disposed in the center of the flexible substrate 821, and basically runs through the radial direction of the flexible substrate 821 (the length of the flexible substrate is greater than 90% of the diameter of the piezoresistive film). In other embodiments not shown, the shape and arrangement of the piezoresistive film 822 can also be in other forms, for example, the shape of the piezoresistive film 822 can also be circular, square, triangular, etc. The arrangement can be that the entire piezoresistive film 822 is disposed in the middle of the flexible substrate 821, or the entire piezoresistive film 822 is disposed at the edge or other positions of the flexible substrate 821, or a plurality of smaller piezoresistive films 822 can be dispersedly disposed on the flexible substrate 821. Other shapes and arrangements of the piezoresistive film 822 that can reduce the Young's modulus of the second composite panel 82 belong to the protection scope of the present utility model.

[0046] In a further embodiment, the spacer layer 83 may be made of double-sided tape or PET gasket, as well as other materials that do not have conductive properties.

[0047] The material of the flexible substrate 821 can be PET, PI, or PEN.

[0048] When the air cavity 4 of the silicone member 5 reaches a negative pressure state, the gas in the resistive airflow switch 8 escapes outward through the through hole 84. Under the action of atmospheric pressure, the flexible substrate 821 drives the piezoresistive film 822 to move toward the first composite panel 81. The piezoresistive film 822 contacts the interdigital electrode 812 through the spacer layer 83, thereby generating a resistance change signal, which is transmitted to the control chip through the wire to control the corresponding components. When the air pressure in the air cavity 4 returns to normal pressure, the piezoresistive film 822 and the interdigital electrode 812 are separated from each other under the action of the spacer 83 and its own elastic force, and the resistive airflow switch 5 is closed. The connection method between the resistive airflow switch and the control chip and the connection method between the control chip and the components adopt the usual method in the field, which will not be repeated here.

[0049] In this embodiment, the Young's modulus of the second composite panel 82 is reduced by partially setting the piezoresistive film 822. When the user's suction force is relatively small, the second composite panel 82 will produce a larger deformation, thereby ensuring the sensitivity of the resistive airflow switch 8.

[0050] Figure 3 2 is a cross-sectional view of an electronic cigarette including a resistive airflow switch according to the present invention. Figure 3 As shown, the electronic cigarette in one embodiment of the present application includes the resistive airflow switch 8 in any of the above embodiments.

[0051] In another embodiment, the electronic cigarette further comprises a mouthpiece 1, a main body 12 and a silicone member 5 connected in sequence, wherein a resistive airflow switch 8 is disposed in the silicone member 5. The main body 12 is provided with an ascending airway 7, one end of which is connected to the mouthpiece 1.

[0052] An air cavity 4, an installation cavity 10, and a first air passage 9 which is arranged in a tortuous manner are provided in the silicone member 5. A resistive airflow switch 5 is provided in the installation cavity 10. The two ends of the first air passage 9 are respectively connected to the through hole 84 of the resistive airflow switch 5 and the air cavity 4. The air cavity 4 is also respectively connected to the ascending air passage 7 and the outside.

[0053] The first air passage 9 is in a spiral shape, a serpentine shape, or a continuously bent shape. These shapes may be formed in a horizontal plane or a vertical plane, or may be a three-dimensional shape. Of course, other non-straight-through designs may also be adopted, which will not be described in detail here.

[0054] The main body includes a shell 6 , a battery 3 and an atomizer 2 , and an ascending airway 7 is defined between the shell 6 and the battery 3 , and between the shell 6 and the atomizer 2 .

[0055] When the user inhales at the mouthpiece 1, the outside air enters the silicone member 5, the air pressure in the air cavity 4 is in a negative pressure state, and the gas in the resistive airflow switch 8 escapes through the through hole 84 and enters the air cavity 4, and enters the atomizer 2 through the ascending airway 7 with the gas in the air cavity, and passes through the mouthpiece 1 for the user to inhale. When the user stops inhaling, the gas in the atomizer 2 will flow back, and the reflux gas will carry the smoke oil. In this embodiment, because the silicone member 5 is arranged at the bottom, the reflux gas needs to pass through the ascending airway 7 from the mouthpiece to enter the silicone member 5, which extends the path of gas reflux, so that the smoke oil in the reflux gas condenses in the ascending airway 7, and avoids the smoke oil from contaminating the resistive airflow switch 8.

[0056] Furthermore, since the first airway 9 adopts a spiral, U-shaped, continuously bent or other non-straight-through design, the gas reflux path is further extended, preventing the smoke oil in the reflux gas from condensing on the surface of the resistive airflow switch 8 and contaminating the resistive airflow switch 8, thereby ensuring the sensitivity of the resistive airflow switch 8.

[0057] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A resistive airflow switch, characterized in that: include: A first composite panel, comprising a finger electrode located on one side thereof, and the first composite panel further comprising a through hole penetrating along a thickness direction thereof; The second composite panel comprises a flexible substrate, wherein a piezoresistive film is disposed on a portion of the flexible substrate facing the interdigitating electrode; A spacer layer is supported at an edge region between the interdigitating electrode and the piezoresistive film, so that a gap is formed between the first composite panel and the second composite panel.

2. The resistive airflow switch according to claim 1, characterized in that: The first composite panel further includes a hard board substrate arranged on a side of the interdigitating electrode away from the piezoresistive film.

3. The resistive airflow switch according to claim 1, characterized in that: The number of the through holes is one or more.

4. The resistive airflow switch according to claim 1, characterized in that: The spacer layer is a double-sided adhesive or a PET gasket.

5. The resistive airflow switch according to claim 3, characterized in that: The material of the flexible substrate is PET, PI or PEN.

6. An electronic cigarette, characterized in that: A resistive airflow switch comprising the resistive airflow switch described in any one of claims 1 to 5.

7. The electronic cigarette according to claim 6, characterized in that: The invention comprises a suction nozzle, a main body and a silicone piece which are connected in sequence, and the resistive airflow switch is arranged in the silicone piece.

8. The electronic cigarette according to claim 7, characterized in that: The main body is provided with an ascending airway, one end of which is connected to the suction nozzle; The silicone member is provided with an air cavity, an installation cavity, and a first tortuous air passage, the installation cavity is provided with the resistive airflow switch, the two ends of the first air passage are respectively connected with the through hole of the resistive airflow switch and the air cavity, and the air cavity is also respectively connected with the ascending air passage and the outside.

9. The electronic cigarette according to claim 8, characterized in that: The first air channel is spiral-shaped.

10. The electronic cigarette according to claim 8, characterized in that: The main body comprises a shell, an atomizer and a battery, and an ascending airway is defined between the shell and the battery, and between the shell and the atomizer.

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