Electronic cigarette sensor with ox-nose shell structure

Abstract

An electronic cigarette sensor of an ox nose shell structure comprises a packaging support, an upper cover, a micro-electro-mechanical sensor and an ASIC chip, the packaging support is provided with a cavity with an upper opening, a high step is arranged on one side of the bottom wall of the cavity, an air inlet channel penetrating through the high step and the bottom wall of the packaging support is arranged on the high step, the micro-electro-mechanical sensor is further arranged on the high step, and the ASIC chip is arranged on the upper cover. The bottom wall of the low step is provided with an ASIC chip, and the ASIC chip is connected with the micro-electro-mechanical sensor through a bonding wire. An upper cover matched with the cavity is arranged above the packaging support, an upper cover waterproof net is arranged on the upper cover, an air inlet hole waterproof net matched with the air inlet channel is arranged below the packaging support, and the special upper cover structure sinks through a mold to form a concave ox nose structure. In an actual smoking experiment and smoking application, tobacco tar prevention and waterproofness of the electronic cigarette sensor are better shown, a waterproof net attached to a traditional electronic cigarette sensor is replaced, the service life of the electronic cigarette sensor is prolonged, and the customer experience feeling is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic cigarette sensors, in particular to an electronic cigarette sensor with a bull nose shell structure. Background Art

[0002] Electronic cigarettes are a new type of electronic product. They are essentially portable electronic cigarettes that mainly imitate the form of traditional cigarettes. They use smoke oil, heating system, power supply and filter tip to heat and atomize, thereby producing aerosols with specific smells. The structure of the electret electronic cigarette sensor on the market is complex. Its structure includes dustproof net, shell, plate, gasket, cavity, diaphragm and copper ring, ASIC, capacitor, circuit board, LED lamp beads. The electret structure electronic sensor is a capacitive sensor. Its principle is: when there is a smoking action, the electronic cigarette sensor as a whole is equivalent to an airflow channel. The direction of the inhalation airflow makes the diaphragm close to the back plate. The change of airflow affects the position of the diaphragm and the plate to deform, and the capacitance value changes. When the change reaches a certain value, the capacitance value of the microphone head is transmitted to the ASIC chip through the bonding wire, and the detection module outputs the smoking signal. The module end of this structure seals the electronic cigarette sensor through a sealed silicone sleeve. Even though the technology of electronic cigarettes has developed to the present, there are still some development difficulties that need to be solved. What difficulties exist in the development of electronic cigarette sensors that need to be solved urgently? There are three main points: consistency, oil resistance, and SMT compatibility; among them, poor oil resistance: Even if disposable electronic cigarettes are better at oil resistance than electronic cigarettes that are repeatedly charged and used, this problem cannot be avoided. Once smoke oil and water vapor enter the gap of the capacitor diaphragm, the overall performance of the electronic cigarette will be reduced. If it accumulates over time or is more at once, the electronic cigarette may fail. The overall structure of the electret electronic cigarette sensor is straight-through, and the air intake hole uses a non-woven protective net with dust-proof function. The back plate of this structure has a large aperture, and there is no protection function for the smoke oil passing through the air intake hole. Smoke oil and water stains can directly contaminate the diaphragm. The air intake hole has no protection function, and dust and water stains in the air can easily enter directly through the air intake hole. The back of the diaphragm causes the electronic cigarette sensor to have problems such as self-starting risk, poor consistency, and short service life; in order to solve the oil resistance of electronic cigarettes, the electret electronic cigarette sensor is mounted with a waterproof net at the end of the air intake hole. The waterproof net at the end of the air intake hole is mounted: the dustproof net is used to prevent the pollution source from entering the interior of the electronic cigarette sensor. It is made of non-woven fabric. The bottom of the protective net is bonded with adhesive. The outer diameter of the adhesive and the protective net are unified. The adhesive has a certain width. After the riveted electronic cigarette sensor is cut, it is placed and arranged in the corresponding fixture using a customized machine, with the circuit board facing up. Then the protective film of the protective net of the entire board is torn off, and it is positioned on the net-sticking fixture through the positioning pins, with the bonding side facing inward. The net-sticking fixture is placed in reverse on the net-sticking machine, and the arranged sensor is placed on the net-sticking machine. The net-sticking machine grabs the sensor and mounts it in the fixture with the protective net. After completion, it is manually peeled off to complete the sensor protective net attachment process.

[0003] The above structure also has the following disadvantages:

[0004] 1. The electret electronic cigarette sensor composed of hamburger-style assembly and mounting has a complex assembly process and many manual operation links, and the product yield and quality are low;

[0005] 2. The electret electronic cigarette sensor has a straight-through structure. Due to the structural characteristics of the non-woven protective net of the air intake hole, smoke oil and water stains directly enter the sensor membrane after passing through the protective net. When there is a smoking action, the membrane with smoke oil or water stains directly adheres to the plate, causing the sensor to continue to output, increasing the risk of the sensor starting up or not starting up;

[0006] 3. The materials of some components of the electret gasket and diaphragm are not resistant to high temperatures. When the components are welded in Luo iron or used in a high temperature environment, the diaphragm is easily deformed, resulting in the risk of self-starting;

[0007] 4. The air intake hole of the circular hole structure has no protective function. Dust and water stains in the air can easily enter the back of the diaphragm directly through the air intake hole, resulting in the risk of self-starting of the electronic cigarette sensor, poor consistency and short service life;

[0008] 5. The current development of waterproof net technology on the market has not yet met the needs of electronic cigarette applications, and the production cost of waterproof nets with multiple characteristics is very expensive;

[0009] 6. Pain points of module installation: The external lead wire needs to be folded back through the sealing sleeve during installation, which has poor air tightness. The external lead wire is thin and easy to break when folded back. Too much metal is exposed at the welding point of the external lead wire and contacts with the outer shell, resulting in short circuit and functional failure.

[0010] 7. The air inlet of the traditional electret straight-through structure is directly aligned with the diaphragm. The rosin and tin beads produced when welding the external wires can easily go directly into the diaphragm and damage it, affecting the quality of the electronic cigarette sensor. Utility Model Content

[0011] 1. Technical issues to be resolved

[0012] In order to solve the above problems, the utility model provides an electronic cigarette sensor with a bull nose shell structure.

[0013] (II) Technical solution

[0014] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electronic cigarette sensor with a bull nose shell structure, characterized in that it includes a packaging bracket, an upper cover, a micro-electromechanical sensor and an ASIC chip, the packaging bracket is provided with a cavity with an upper opening, a high step is provided on one side of the bottom wall of the cavity, an air intake channel penetrating the high step and the bottom wall of the packaging bracket is provided on the high step, the micro-electromechanical sensor is also provided on the high step, the cavity is away from the high step as a low step, the bottom wall of the low step is provided with the ASIC chip, and the ASIC chip is connected to the micro-electromechanical sensor through bonding wires;

[0015] An upper cover adapted to the cavity is arranged above the packaging bracket, an upper cover waterproof net is arranged on the upper cover, an air inlet waterproof net adapted to the air inlet channel is arranged below the packaging bracket, and a bull nose groove formed by sinking the mold is arranged on the upper cover.

[0016] In this embodiment, the micro-electromechanical sensor and the ASIC chip are respectively fixed at the high step and the low step in the packaging cavity by using a fixing colloid.

[0017] In this embodiment, the air intake passage is a Z-shaped passage.

[0018] In this embodiment, the air intake hole of the upper cover presents a bull nose structure. Due to the protectiveness of the side wall, the oil and water resistance of this structure is more excellent.

[0019] In this embodiment, the cavity is also filled with a thermally conductive encapsulating glue for covering the bonding wires and the ASIC chip.

[0020] In this embodiment, the micro-electromechanical sensor is fixed to the high step in the cavity of the package bracket by a low-stress colloid, and the ASIC chip is bonded to the low step of the package bracket by a high-thermal conductive colloid.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the utility model provides an electronic cigarette sensor with a bull nose shell structure, which has the following beneficial effects:

[0023] 1. The shell structure of the bull nose adopts MEMS packaging with fewer assembly processes and short process routes. It adopts automated operation processes, which greatly improves production efficiency and quality and reduces labor and equipment cost investment;

[0024] 2. In the MEMS packaging structure, an inverted "Z"-shaped air guide hole is formed by injection molding at the bottom of the high platform of the packaging bracket. The air guide hole extends the path of airflow entry and also changes the direction of airflow entering the packaging cavity. Even if smoke oil and water stains enter the Z-shaped air guide tube through the protective net, they will slowly flow along the inner wall of the Z-shaped air guide tube. When flowing along the air guide tube, the smoke oil and water stains may be absorbed by the plastic. This section of the air guide tube can prevent more smoke oil and water stains from entering, which more effectively solves the difficulty of smoke oil and water stains in the electronic cigarette industry entering the sensor;

[0025] 3. The special upper cover structure forms a concave bull nose structure by sinking. Compared with the traditional round hole air intake hole, the upper cover of the bull nose structure has more outstanding waterproof and oil-proof performance due to the side air intake and the side wall blocking the smoke oil and water stains. It is more superior in the actual puffing experiment and smoking application to show its anti-smoke oil and waterproof performance, replacing the waterproof net of the traditional electronic cigarette sensor mounting, and improving the service life of the electronic cigarette sensor and customer experience;

[0026] 4. The airflow inside the electronic cigarette sensor with MEMS packaging structure presents an inverted Z-shaped flow direction. Compared with the straight-through airflow direction of the electret, the Z-shaped flow direction better reflects the function of protecting components, so that the airflow will not be directly aimed at the diaphragm, preventing the oil or water stains that pass through the protective net from falling directly or adhering to the diaphragm, affecting the output of the electronic cigarette, and reducing the risk of the electronic cigarette sensor starting up or not starting up;

[0027] 5. To solve the installation pain points of the electret module end, it can be fully combined with the external module end through SMT mounting, without the need for external installation, to solve the problems of the lead wire needing to be folded back through the sealing sleeve, poor air tightness, easy breakage of the external lead wire when folded back, and too much exposed metal at the external lead wire welding point contacting with the shell, resulting in short circuit function failure;

[0028] 6. Reduce the risk of traditional electret electronic cigarette sensors when welding external wires, avoid the risk of rosin and tin beads generated when welding external wires and easily directly enter and damage the diaphragm, and improve the quality of electronic cigarette sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structural cross section of the utility model;

[0030] Figure 2 It is a schematic top view of the structure of the utility model;

[0031] Figure 3 It is a bottom view schematic diagram of the structure of the utility model;

[0032] In the figure: 1. Packaging bracket; 2. Upper cover; 3. MEMS sensor; 4. ASIC chip; 5. High step; 6. Air intake channel; 7. Bonding wire; 8. Encapsulation glue; 9. Upper cover waterproof net; 10. Air intake hole waterproof net; 11. Air intake hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-3 , an electronic cigarette sensor with a bull nose shell structure, comprising a packaging bracket 1, an upper cover 2, a micro-electromechanical sensor 3 and an ASIC chip 4, wherein the packaging bracket 1 is provided with a cavity with an upper opening, a high step 5 is provided on one side of the bottom wall of the cavity, an air inlet channel 6 penetrating the high step 5 and the bottom wall of the packaging bracket 1 is provided on the high step 5, the micro-electromechanical sensor 3 is also provided on the high step 5, the ASIC chip 4 is provided on the bottom wall of the cavity away from the high step 5, the ASIC chip 4 is connected to the micro-electromechanical sensor 3 through a bonding wire 7, and the ASIC chip 4 is coated with an encapsulation glue 8;

[0035] An upper cover 2 adapted to the cavity is arranged above the packaging bracket 1, and an upper cover waterproof net 9 is arranged on the upper cover 2. An air inlet waterproof net 10 adapted to the air inlet channel 6 is arranged below the packaging bracket 1, and an air intake hole 11 with a bull nose structure that sinks to form an inward concave shape is arranged on the upper cover.

[0036] The overall structure includes, from top to bottom, an upper cover 2 with an upper cover 2 protective net, a micro-electromechanical sensor 3, an ASIC chip 4, an air intake channel 6 and an air intake hole waterproof net 10. The structure is very simple, and the processing cost is much lower than that of a traditional electret electronic cigarette sensor, and automated production can be achieved.

[0037] The production process includes: bonding, wire bonding, glue dispensing, SMT, cutting, testing, and packaging to complete the delivery of finished products. Bonding: Through mature wafer curing technology, the MEMS sensor and ASIC chip are fixed on the high and low steps in the package cavity using a fixed colloid; Wire bonding: By using bonding wires, the MEMS sensor, ASIC chip and the circuit between the package bracket are connected to form a circuit connection inside the electronic cigarette sensor; Glue dispensing: Use thermally conductive encapsulating glue to seal and protect the ASIC chip and the surrounding bonding wires. To improve the heat dissipation capacity of ASIC itself; cover shell: use a jig to mount the entire bull nose structure shell to the packaging bracket, the entire outer cover is printed / glued using equipment, and the processed outer cover is mounted on the packaging bracket using relevant jigs, and baked and cured to complete the MEMS packaging process cover shell mounting; cutting: cut the entire panel of electronic cigarette sensors into single ones; testing: use testing equipment to distinguish and classify products with different characteristics, gears, and performance after cutting; packaging: use equipment to package electronic cigarette sensors of the same category after testing.

[0038] The electronic sensor with the bull nose shell structure is based on the lead frame as the main body. The bull nose shell structure is designed in an inward-concave manner, forming an inward-concave bull nose structure air intake hole with a sinking shape. A specific mold is used to punch out the concave shell on the original flat surface through a stamping process to present a bull nose structure. The shell of this structure has strong waterproof and oil-proof properties, which perfectly solves the problems of poor oil resistance and complex waterproof net mounting process in the electronic cigarette industry.

[0039] 1. The shell structure of the bull nose adopts MEMS packaging with fewer assembly processes and short process routes. It adopts automated operation processes, which greatly improves production efficiency and quality and reduces labor and equipment cost investment;

[0040] 2. In the MEMS packaging structure, an inverted "Z"-shaped air guide hole is formed by injection molding at the bottom of the high platform of the packaging bracket. The air guide hole extends the path of airflow entry and also changes the direction of airflow entering the packaging cavity. Even if smoke oil and water stains enter the Z-shaped air guide tube through the protective net, they will slowly flow along the inner wall of the Z-shaped air guide tube. When flowing along the air guide tube, the smoke oil and water stains may be absorbed by the plastic. This section of the air guide tube can prevent more smoke oil and water stains from entering, which more effectively solves the difficulty of smoke oil and water stains in the electronic cigarette industry entering the sensor;

[0041] 3. The special upper cover structure forms a concave bull nose structure by sinking. Compared with the traditional round hole air intake hole, the upper cover of the bull nose structure has more outstanding waterproof and oil-proof performance due to the side air intake and the side wall blocking the smoke oil and water stains. It is more superior in the actual puffing experiment and smoking application to show its anti-smoke oil and waterproof performance, replacing the waterproof net of the traditional electronic cigarette sensor mounting, and improving the service life of the electronic cigarette sensor and customer experience;

[0042] 4. The airflow inside the electronic cigarette sensor with MEMS packaging structure presents an inverted Z-shaped flow direction. Compared with the straight-through airflow direction of the electret, the Z-shaped flow direction better reflects the function of protecting components, so that the airflow will not be directly aimed at the diaphragm, preventing the oil or water stains that pass through the protective net from falling directly or adhering to the diaphragm, affecting the output of the electronic cigarette, and reducing the risk of the electronic cigarette sensor starting up or not starting up;

[0043] 5. To solve the installation pain points of the electret module end, it can be fully combined with the external module end through SMT mounting, without the need for external installation, to solve the problems of the lead wire needing to be folded back through the sealing sleeve, poor air tightness, easy breakage of the external lead wire when folded back, and too much exposed metal at the external lead wire welding point contacting with the shell, resulting in short circuit function failure;

[0044] 6. Reduce the risk of traditional electret electronic cigarette sensors when welding external wires, avoid the risk of rosin and tin beads generated when welding external wires and easily directly enter and damage the diaphragm, and improve the quality of electronic cigarette sensors.

[0045] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0047] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0048] Although the embodiments of the utility model have been shown and described, it is understood that a person of ordinary skill in the art can make various changes, modifications, substitutions and variations to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is limited by the attached claims and their equivalents. The above embodiments only express several preferred implementations of the utility model, and the description is more specific and detailed. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as an exclusion of other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept of this article through the above teachings or the technology or knowledge of the relevant field, and it cannot be understood as a limitation on the scope of the utility model. It should be pointed out that a person of ordinary skill in the art can make several deformations and improvements without departing from the concept of the utility model. The changes and modifications made by the personnel in the field do not depart from the spirit and scope of the utility model, and these belong to the scope of protection of the attached claims of the utility model. Therefore, the scope of protection of the utility model patent shall be subject to the attached claims.

Claims

1. An electronic cigarette sensor with a bull nose housing structure, characterized in that: The invention comprises a packaging support (1), an upper cover (2), a micro-electromechanical sensor (3) and an ASIC chip (4); the packaging support (1) is provided with a cavity with an upper opening; a high step (5) is provided on one side of the bottom wall of the cavity; an air inlet passage (6) is provided on the high step (5) and passes through the high step (5) and the bottom wall of the packaging support (1); the micro-electromechanical sensor (3) is also provided on the high step (5); a low step is provided at a part of the cavity away from the high step (5); the ASIC chip (4) is provided on the bottom wall of the low step; the ASIC chip (4) is connected to the micro-electromechanical sensor (3) via a bonding wire (7); An upper cover (2) adapted to the cavity is arranged above the packaging bracket (1), an upper cover waterproof net (9) is arranged on the upper cover (2), an air inlet waterproof net (10) adapted to the air inlet channel (6) is arranged below the packaging bracket (1), and an air intake hole (11) with a concave bull nose structure is arranged on the upper cover.

2. The electronic cigarette sensor with a bull nose housing structure according to claim 1, characterized in that: The micro-electromechanical sensor and the ASIC chip are respectively fixed at the high step and the low step in the packaging cavity by using a fixing colloid.

3. The electronic cigarette sensor with a bull nose housing structure according to claim 1, characterized in that: The air intake channel (6) is a Z-shaped channel.

4. The electronic cigarette sensor with a bull nose housing structure according to claim 1, characterized in that: The air intake hole of the upper cover presents a bull nose structure and air is sucked through the side wall. Due to the barrier protection of the side wall, the oil and water resistance of this structure is more excellent.

5. The electronic cigarette sensor with a bull nose housing structure according to claim 1, characterized in that: The cavity is also filled with heat-conducting encapsulating glue (8) for encapsulating the bonding wire (7) and the ASIC chip (4).

6. The electronic cigarette sensor with a bull nose housing structure according to claim 1, characterized in that: The micro-electromechanical sensor (3) is fixed to the high step (5) in the cavity of the packaging bracket (1) through a low-stress colloid, and the ASIC chip (4) is bonded to the low step of the packaging bracket (1) through a high-thermal conductive colloid.

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