Airflow sensor and electronic cigarette thereof

Abstract

The utility model discloses an airflow sensor and an electronic cigarette thereof, which comprise a shell, a mounting inner cavity opened towards two ends is arranged in the shell, a circuit board assembly is arranged at one end opening of the mounting inner cavity, a polar plate part is arranged in the mounting inner cavity below the circuit board assembly, and the polar plate part is provided with an air inlet and an air outlet. An opening at the other end of the mounting inner cavity is provided with a thin film part, an oil separation gasket is arranged between the thin film part and the opening of the mounting inner cavity, and a capacitance gap is formed between the polar plate part and the thin film part; the polar plate part and the thin film part are electrically connected with the circuit board assembly respectively; when the electronic cigarette is used, the opening in the end, close to the thin film part, of the shell is close to a suction nozzle of the electronic cigarette, and when tobacco tar in the electronic cigarette overflows, the gap between the thin film part and the mounting inner cavity is blocked through the tar separation gasket, so that the overall sealing performance of the interior of the shell is improved, and the tobacco tar is prevented from overflowing into the shell from the gap between the thin film part and the mounting inner cavity; and the circuit board assembly is prevented from being damaged by tobacco tar.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic cigarettes, and in particular to an airflow sensor and an electronic cigarette thereof. Background Art

[0002] The airflow sensor is one of the important accessories of the electronic cigarette. However, the existing airflow sensors often have the problem of smoke oil penetration when in use. The smoke oil usually penetrates from the end of the airflow sensor close to the mouthpiece of the electronic cigarette, which easily corrodes the accessories inside the airflow sensor, greatly affecting the detection accuracy of the airflow sensor.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide an airflow sensor, which can improve the sealing performance of the airflow sensor and prevent tobacco oil from penetrating into the interior of the airflow sensor from one end surface of the airflow sensor close to the cigarette holder.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An airflow sensor comprises a shell, wherein an installation cavity opened at both ends is provided in the shell, a circuit board assembly is provided at one end opening of the installation cavity, a pole plate portion is provided below the circuit board assembly in the installation cavity, a film portion is provided at the other end opening of the installation cavity, an oil-isolating gasket is provided between the film portion and the opening of the installation cavity, a capacitance gap is formed between the pole plate portion and the film portion; the pole plate portion and the film portion are electrically connected to the circuit board assembly respectively.

[0007] In the airflow sensor, the installation inner cavity is provided with a sealing wall extending toward the center of the opening at one end of the opening close to the film part; the periphery of the film part is connected to the sealing wall through the oil-isolating gasket.

[0008] In the airflow sensor, the thin film part includes a diaphragm and a first conductive ring, the diaphragm is arranged in the cavity of the first conductive ring; the outer edge of the first conductive ring abuts against the cavity wall of the installation cavity, and the bottom of the first conductive ring abuts against the oil-isolating gasket; the first conductive ring is electrically connected to the circuit board assembly.

[0009] In the airflow sensor, the top and bottom of the circuit board assembly are respectively provided with a first electrode and a second electrode; the electrode plate portion is in contact with the second electrode; the top of the shell extends toward the first electrode to form a conductive wall, the conductive wall is in contact with the first electrode, and the conductive ring is electrically connected to the shell.

[0010] In the airflow sensor, the electrode plate portion includes an electrode plate, a second conductive ring and an insulating ring, one end of the second conductive ring contacts the top of the electrode plate, the other end of the second conductive ring contacts the second electrode, the insulating ring is sleeved on the periphery of the electrode plate and the second conductive ring, and the insulating ring abuts against the cavity wall of the installation cavity.

[0011] In the airflow sensor, an insulating gasket is provided in the capacitor gap, and two surfaces of the insulating gasket are respectively in contact with the electrode portion and the film portion.

[0012] In the airflow sensor, at least one air hole is provided on each of the circuit board assembly and the electrode plate.

[0013] In the airflow sensor, a dust-proof filter is provided at an opening of the shell near one end of the film portion.

[0014] The present application also provides an electronic cigarette, comprising the airflow sensor as described above.

[0015] Beneficial effects:

[0016] The utility model provides an airflow sensor. When in use, an opening at one end of a shell close to a film portion is close to a mouthpiece of an electronic cigarette. When the smoke oil in the electronic cigarette overflows, an oil-isolating gasket is used to seal the gap between the film portion and an installation inner cavity, thereby improving the overall sealing of the shell interior, preventing the smoke oil from overflowing from the gap between the film portion and the installation inner cavity into the shell, and preventing the smoke oil from damaging the circuit board assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the disassembled structure of the airflow sensor provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the airflow sensor provided by the utility model.

[0019] Explanation of main component symbols: 1-shell, 11-installation cavity, 12-sealing wall, 13-conducting wall, 2-circuit board assembly, 21-first electrode, 22-air vent, 3-plate part, 31-electrode plate, 32-second conductive ring, 33-insulating ring, 4-thin film part, 41-diaphragm, 42-first conductive ring, 5-insulating gasket, 6-oil separator gasket, 7-dust filter, 8-capacitor gap. DETAILED DESCRIPTION

[0020] The utility model provides an airflow sensor and an electronic cigarette thereof. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "middle", "inner side", "outer side", etc. are directions or positional relationships of the present invention based on the drawings, which are only for the convenience of describing the present invention and simplifying the description. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0022] See also Figure 1 to Figure 2 The utility model provides an airflow sensor, including a shell 1, wherein the shell 1 is provided with an installation cavity 11 opened at both ends, wherein a circuit board assembly 2 is provided at one end opening of the installation cavity 11, wherein a plate portion 3 is provided below the circuit board assembly 2, wherein a film portion 4 is provided at the other end opening of the installation cavity 11, wherein an oil-isolating gasket 6 is provided between the film portion 4 and the opening of the installation cavity 11, wherein a capacitance gap 8 is formed between the plate portion 3 and the film portion 4; wherein the plate portion 3 and the film portion 4 are electrically connected to the circuit board assembly 2, respectively.

[0023] In actual use, the opening of one end of the shell 1 close to the film part 4 is close to the mouthpiece of the electronic cigarette. When the smoke oil in the electronic cigarette overflows, the gap between the film part 4 and the installation inner cavity 11 is sealed by the oil-isolating gasket 6 to improve the overall sealing of the inside of the shell 1, prevent the smoke oil from overflowing from the gap between the film part 4 and the installation inner cavity 11 into the shell 1, and avoid the smoke oil from damaging the circuit board assembly 2.

[0024] The specific working principle is as follows: when the airflow flows from the plate portion 3 to the film portion 4, that is, the user is inhaling, the film portion 4 bulges and deforms in the direction away from the plate portion 3, thereby increasing the capacitor gap 8 between the film portion 4 and the plate portion 3, even if the capacitance between the two becomes smaller. At this time, the electrical signals generated on the plate portion 3 and the film portion 4 are respectively transmitted to the circuit board assembly 2. When the circuit board assembly 2 detects the change in capacitance, it determines that the electronic cigarette has inhaled, and outputs a start signal to control the electronic cigarette to perform the corresponding action.

[0025] It should be understood that there is a certain distance between the film portion 4 and the electrode portion 3 , namely the capacitor gap 8 , thereby forming a variable capacitor structure, and the capacitance of the variable capacitor varies according to the size of the capacitor gap 8 .

[0026] It should be noted that the circuit board assembly 2 adopts the existing airflow detection circuit for working control, such as an airflow detection circuit composed of a capacitor to be measured, a reference capacitor, a frequency generating circuit, a frequency dividing circuit and a timing circuit; or a control circuit composed of a single-chip microcomputer for working control; the specific circuit structure and working principle are all existing technologies and will not be repeated here.

[0027] like Figure 1 to Figure 2 As shown, further, the installation inner cavity 11 is provided with a sealing wall 12 extending toward the center of the opening near one end of the film part 4; the periphery of the film part 4 is connected to the sealing wall 12 through the oil-isolating gasket 6; the sealing wall 12 is utilized to increase the contact area between the film part 4 and the shell 1 to improve the sealing performance of the oil-isolating gasket 6.

[0028] In this embodiment, the oil-isolating gasket 6 is a flexible oil-isolating gasket, which can be an existing silicone gasket, rubber gasket or other gasket with flexible characteristics.

[0029] like Figure 1 to Figure 2 As shown, further, the thin film part 4 includes a diaphragm 41 and a first conductive ring 42, and the diaphragm 41 is arranged in the cavity of the first conductive ring 42; the outer edge of the first conductive ring 42 abuts against the cavity wall of the installation cavity 11, and the bottom of the first conductive ring 42 abuts against the oil-isolating gasket 6; the first conductive ring 42 is electrically connected to the circuit board assembly 2; when in use, the oil-isolating gasket 6 is used to fill the gap between the first conductive ring 42 and the cavity wall of the installation cavity 11, thereby improving the sealing of the installation cavity 11 and preventing smoke oil from entering the installation cavity 11; in addition, the first conductive ring 42 is used to enhance the overall strength and overall tension of the diaphragm 41 to avoid the problem of tearing of the diaphragm 41 due to high-intensity airflow, and the first conductive ring 42 is used as a conductive medium to be electrically connected to the circuit board assembly 2.

[0030] like Figure 1 to Figure 2 As shown, further, the top and bottom of the circuit board assembly 2 are respectively provided with a first electrode 21 and a second electrode (not shown in the figure); the electrode plate portion 3 is in contact with the second electrode; the top of the shell 1 extends toward the direction of the first electrode 21 to form a conductive wall 13, the conductive wall 13 is in contact with the first electrode 21, and the first conductive ring 42 is electrically connected to the shell 1; the shell 1 is electrically connected to the first electrode 21 by providing the conductive wall 13, so that the first conductive ring 42 is electrically connected to the first electrode 21, that is, the electrical connection between the diaphragm 41 and the first electrode 21 is completed, and in addition, the electrode plate portion 3 is electrically connected to the second electrode by physical contact, so that the airflow sensor can complete the internal electrical connection without using other electrical connection accessories such as conductive wires.

[0031] like Figure 1 to Figure 2As shown, further, the electrode plate portion 3 includes an electrode plate 31, a second conductive ring 32 and an insulating ring 33, one end of the second conductive ring 32 is in contact with the top of the electrode plate 31, and the other end of the second conductive ring 32 is in contact with the second electrode, and the insulating ring 33 is sleeved on the periphery of the electrode plate 31 and the second conductive ring 32, and the insulating ring 33 is in contact with the cavity wall of the installation cavity 11; when in use, the electrode plate 31 and the second conductive ring 32 are electrically isolated from the inner wall of the shell 1 by the insulating ring 33, so as to avoid the problem of short circuit between the electrode plate 31 and the diaphragm 41; in addition, the second conductive ring 32 is used to increase the contact area between the electrode plate 31 and the second electrode, so as to avoid the problem of poor contact between the electrode plate 31 and the second electrode.

[0032] It should be noted that the housing 1 , the first conductive ring 42 and the second conductive ring 32 are made of conductive materials, such as metal materials such as copper, aluminum, and iron, or conductive compounds such as conductive plastics and conductive rubber.

[0033] It should be noted that the insulating ring 33 may be a structure with insulating properties such as a rubber ring, a silicone ring, or a plastic ring.

[0034] like Figure 1 to Figure 2 As shown, further, an insulating gasket 5 is provided in the capacitor gap 8, and the two sides of the insulating gasket 5 are respectively abutted against the electrode portion 3 and the film portion 4; the insulating gasket 5 is used to separate the relative connection positions of the electrode portion 3 and the film portion 4, thereby realizing electrical isolation between the electrode portion 3 and the film portion 4, thereby achieving an insulation effect.

[0035] It should be noted that the insulating gasket 5 can be a rubber gasket, a silicone gasket, a plastic gasket or other insulating gasket.

[0036] like Figure 1 to Figure 2 As shown, further, at least one air hole 22 is provided on each of the circuit board assembly 2 and the electrode plate 31; by providing the air hole 22 on the circuit board assembly 2 and the electrode plate 31, the fluidity of the airflow in the airflow sensor can be effectively improved.

[0037] like Figure 1 to Figure 2 As shown, further, a dust filter 7 is provided at the opening of the shell 1 near one end of the film portion 4; the dust filter 7 can prevent pollutants such as dust and saliva from entering the installation cavity 11, thereby improving the cleanliness of the environment of the installation cavity 11.

[0038] In this embodiment, the dust filter part can be a structure with filtering function such as an existing filter screen structure, an existing filter cloth structure, an existing filter membrane structure, etc.

[0039] The present application also provides an electronic cigarette, comprising the airflow sensor as described above.

[0040] To sum up, when in use, the opening of one end of the shell 1 close to the film part 4 is close to the mouthpiece of the electronic cigarette. When the smoke oil in the electronic cigarette overflows, the gap between the film part 4 and the installation inner cavity 11 is sealed by the oil-isolating gasket 6 to improve the overall sealing of the inside of the shell 1, prevent the smoke oil from overflowing from the gap between the film part 4 and the installation inner cavity 11 into the shell 1, and avoid the smoke oil from damaging the circuit board assembly 2.

[0041] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. An airflow sensor, characterized in that: It comprises a shell, wherein an installation cavity opened at both ends is arranged in the shell, a circuit board assembly is arranged at one end opening of the installation cavity, a plate portion is arranged below the circuit board assembly in the installation cavity, a film portion is arranged at the other end opening of the installation cavity, an oil-isolating gasket is arranged between the film portion and the opening of the installation cavity, a capacitor gap is formed between the plate portion and the film portion; the plate portion and the film portion are electrically connected to the circuit board assembly respectively.

2. An airflow sensor according to claim 1, characterized in that: The installation inner cavity is provided with a sealing wall extending toward the center of the opening near one end of the film part; the periphery of the film part is connected to the sealing wall through the oil-isolating gasket.

3. An airflow sensor according to claim 2, characterized in that: The thin film portion includes a diaphragm and a first conductive ring, the diaphragm is arranged in the cavity of the first conductive ring; the outer edge of the first conductive ring abuts against the cavity wall of the installation inner cavity, and the bottom of the first conductive ring abuts against the oil-isolating gasket; the first conductive ring is electrically connected to the circuit board assembly.

4. An airflow sensor according to claim 3, characterized in that: The top and bottom of the circuit board assembly are respectively provided with a first electrode and a second electrode; the electrode plate portion is in contact with the second electrode; the top of the shell extends toward the first electrode to form a conductive wall, the conductive wall is in contact with the first electrode, and the first conductive ring is electrically connected to the shell.

5. An airflow sensor according to claim 4, characterized in that: The electrode plate portion includes an electrode plate, a second conductive ring and an insulating ring, one end of the second conductive ring contacts the top of the electrode plate, the other end of the second conductive ring contacts the second electrode, the insulating ring is sleeved on the periphery of the electrode plate and the second conductive ring, and the insulating ring abuts against the cavity wall of the installation cavity.

6. The airflow sensor according to claim 1, characterized in that: An insulating gasket is arranged in the capacitor gap, and two surfaces of the insulating gasket are respectively in contact with the electrode portion and the film portion.

7. The airflow sensor according to claim 5, characterized in that: The circuit board assembly and the electrode plate are each provided with at least one ventilation hole.

8. The airflow sensor according to claim 1, characterized in that: A dustproof filter is arranged at an opening of the shell close to one end of the film portion.

9. An electronic cigarette, characterized in that: The electronic cigarette comprises the airflow sensor as described in any one of claims 1-8.

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