Heat generating body and electronic cigarette

Abstract

The utility model discloses a kind of heating body and electronic cigarette, it is related to heating body technical field, wherein, heating body includes heating component, conductor and support, heating component includes steel pipe and the heating film that is wrapped in the outer periphery of steel pipe, support and steel pipe bottom abut, conductor is at least partially embedded in support inside, both ends of conductor are exposed to support, and the first end of conductor is welded with heating film, the second end of conductor is used for welding with mainboard;Wherein, conductor and support are integrally combined by insert injection molding.

Description

Technical Field

[0001] This utility model relates to the field of heating element technology, and in particular to a heating element and an electronic cigarette. Background Technology

[0002] In the production of aerosol heating elements, the electrical connection between the heating film and the nickel wire is one of the key processes to achieve the atomization function.

[0003] In existing technologies, resistance welding is typically used to weld one end of a nickel wire to a heating film, while the other end of the nickel wire is connected to a PCB board to achieve current transmission, thereby providing the heating film with operating voltage through the nickel wire.

[0004] To connect the nickel wire to the PCB board, the other end of the nickel wire needs to be passed through the wire guide hole in the casing. In the existing technology, since the nickel wire has no structural support and is in a state of free swing, the wire threading process needs to be done manually. In addition, to prevent e-liquid from leaking out of the wire guide hole, it is necessary to manually apply glue to seal the wire guide hole, which leads to low production efficiency.

[0005] Therefore, it is necessary to provide a new heating element and electronic cigarette to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this invention is to propose a heating element and an electronic cigarette, aiming to improve the technical problem of low production efficiency in the prior art.

[0007] To achieve the above objectives, according to one aspect of this utility model, a heating element is provided, comprising: The heating element includes a steel pipe and a heating film wrapped around the outer periphery of the steel pipe; conductor; A bracket abuts against the bottom of the steel pipe, the conductor is at least partially embedded inside the bracket, both ends of the conductor are exposed to the bracket, and the first end of the conductor is welded to the heating film, and the second end of the conductor is used to weld to the motherboard; The conductor and the bracket are integrally formed by insert injection molding.

[0008] According to another aspect of the present invention, an electronic cigarette is also provided, comprising the heating element described above. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the first embodiment of the heating element provided by this utility model; Figure 2 A schematic diagram of the structure of an embodiment of the bracket provided by this utility model; Figure 3 A schematic diagram illustrating the fitting of the bracket and conductor provided by this utility model; Figure 4 A schematic diagram of the connection between the lower housing and the sealing ring provided by this utility model from one perspective; Figure 5 A schematic diagram of the connection between the lower housing and the sealing ring from another perspective of this utility model; Figure 6 A schematic diagram of the connection between the conductor, bracket, lower housing and sealing ring provided by this utility model from one perspective; Figure 7 A schematic diagram of the connection between the conductor, bracket, lower housing and sealing ring provided by this utility model from another perspective; Figure 8 A schematic diagram of the structure of the heating element in the second embodiment of this utility model from one perspective; Figure 9 A schematic diagram of the structure of the second embodiment of the heating element provided by this utility model from another perspective; Figure 10 This is a cross-sectional view of the second embodiment of the heating element provided by this utility model.

[0011] Explanation of icon numbers: 100. Heating element; 1. Heating component; 11. Steel pipe; 12. Heating film; 2. Conductor; 21. First connecting section; 22. Second connecting section; 3. Bracket; 31. Fitting position; 311. First fitting groove; 312. Second fitting groove; 32. Mounting groove; 33. First positioning hole; 4. Sealing ring; 41. First through hole; 5. Outer shell; 51. Lower shell; 511. Groove; 512. Second through hole; 513. Third positioning hole; 52. Upper shell; 521. Second positioning hole; 6. Adapter plate; 61. Pin; 62. Welding hole.

[0012] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0014] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0015] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0016] In the production of aerosol heating elements, the electrical connection between the heating film and the nickel wire is one of the key processes to achieve the atomization function.

[0017] In existing technologies, resistance welding is typically used to weld one end of a nickel wire to a heating film, while the other end of the nickel wire is connected to a PCB board to achieve current transmission, thereby providing the heating film with operating voltage through the nickel wire.

[0018] To connect the nickel wire to the PCB board, the other end of the nickel wire needs to be passed through the wire guide hole in the casing. In the existing technology, since the nickel wire has no structural support and is in a state of free swing, the wire threading process needs to be done manually. In addition, to prevent e-liquid from leaking out of the wire guide hole, it is necessary to manually apply glue to seal the wire guide hole, which leads to low production efficiency.

[0019] To address the issue of low production efficiency, after the nickel wire is welded to the heating film, a bracket or fixing seat with positioning slots is typically used to mechanically constrain the nickel wire. Pre-pressing with a mold standardizes the spacing and length of the nickel wire leads, eliminating free swing. The bracket is equipped with guide posts that precisely align with the wire-passing holes on the outer casing, enabling the bracket and nickel wire to be threaded as a whole, replacing manual threading one by one. Although this can improve production efficiency, the steps are still too cumbersome, and the gap between the nickel wire and the wire-passing holes still requires manual sealing, which does not significantly improve production efficiency. Therefore, the applicant has researched a heating element structure that can significantly improve production efficiency.

[0020] Please see Figure 1 According to one aspect of the present invention, a heating element 100 is provided. The heating element 100 includes a heating component 1, a conductor 2, and a support 3. The heating component 1 includes a steel pipe 11 and a heating film 12 wrapped around the outer periphery of the steel pipe 11. The support 3 abuts against the bottom of the steel pipe 11. The conductor 2 is at least partially embedded inside the support 3. Both ends of the conductor 2 are exposed on the support 3. The first end of the conductor 2 is welded to the heating film 12, and the second end of the conductor 2 is used for welding to the main board. The conductor 2 and the support 3 are integrally combined by insert injection molding. Specifically, a heating film 12 is wrapped around the outer periphery of a steel pipe 11 through coating, sintering, or winding processes. The heating film 12 can be a resistive paste or a ceramic heating layer, etc. Leads are reserved on the heating film 12 as connection points for welding with the conductor 2. The conductor 2 is then pre-processed into a predetermined shape and placed into the cavity of an injection mold. Molten injection molding material is injected into the mold, and the conductor 2 is at least partially embedded inside the plastic support 3 through an insert injection molding process, with only its two ends exposed outside the support 3. After cooling and solidification, the conductor 2 and the support 3 form an integral structure, with a positioning plane reserved on the support 3 to abut against the steel pipe 11. The injection molding material can be a high-temperature resistant plastic, such as PA66 with glass fiber reinforcement. Next, align the prefabricated heating element 1 with the bracket 3 after the insert is injection molded, so that the positioning plane of the bracket 3 abuts against the bottom of the steel pipe 11, ensuring that the pin of the heating film 12 contacts one end of the conductor 2; weld the exposed end of the conductor 2 to the pin through resistance welding or laser welding process to form an electrical connection path, and electrically connect the other end of the conductor 2 to the main board, so as to complete the circuit conduction of the heating film 12, conductor 2 and main board.

[0021] In this embodiment, the conductor 2 is integrally formed with the bracket 3 through insert injection molding, eliminating the problem of free swing caused by the traditional lack of a fixed structure. The conductor 2, which extends out of the bracket 3, is equivalent to a pin. The size and shape of the connecting parts of the bracket 3 and the conductor 2 are fixed, so subsequent automated clamping, installation and welding can be achieved through mechanical equipment. At the same time, since the conductor 2 is integrally formed with the bracket 3 through insert injection molding, there are no gaps between the bracket 3 and the conductor 2, completely avoiding the risk of e-liquid leaking into the motherboard. It also eliminates the steps of manually applying sealant and manually threading wires, thereby greatly improving production efficiency.

[0022] In one embodiment, the conductor 2 is bent to form a first connecting segment 21 and a second connecting segment 22 that are perpendicularly connected to each other. The bracket 3 has a fitting position 31, which includes a first fitting groove 311 and a second fitting groove 312 that are interconnected. The first connecting segment 21 has a first end, and the second connecting segment 22 has a second end on the side away from the first connecting segment 21. The first connecting segment 21 fits into the first fitting groove 311, and the first end extends out of the first fitting groove 311; the second connecting segment 22 fits into the second fitting groove 312, and the second end is exposed in the second fitting groove 312. The conductor 2 is pre-processed into a zigzag structure using a stamping die or bending fixture to form the first connecting segment 21 and the second connecting segment 22 that are perpendicular to each other or at a preset angle. The bends are rounded to avoid stress concentration. The pre-shaped conductor 2 can be directly placed into the mold as an insert to avoid deformation during injection molding, ensuring that the first connecting segment 21 and the second connecting segment 22 can be accurately embedded into the corresponding fitting grooves. The injection mold cavity corresponds to the shape of the bracket 3 and integrates a fitting position 31 that matches the conductor 2. The first fitting groove 311 is used to accommodate the second connecting segment 22 and restrict its axial movement; the second fitting groove 312 is perpendicularly connected to the first fitting groove 311 and its width is slightly larger than the diameter of the first connecting segment 21, used to guide the first connecting segment 21. 1. Passes through and enters the first fitting groove 311. At the same time, the thickness of the groove sidewall of the first fitting groove 311 is less than the thickness of the groove sidewall of the second fitting groove 312. This can enhance the strength of the fitting position 31 and prevent the fitting position 31 from breaking. Through the mechanical positioning pin or vacuum adsorption device in the mold, the pre-bent conductor 2 is accurately fixed in the fitting position 31, ensuring that the first connecting segment 21 extends into the first fitting groove 311 after passing through the second fitting groove 312, and the second connecting segment 22 naturally falls into the end of the first fitting groove 311. After the first connecting segment 21 passes through the second fitting groove 312, its end extends from the preset opening of the first fitting groove 311 for subsequent welding with the heating film 12; the second connecting segment 22 is completely embedded in the first fitting groove 311, with only its end exposed on the surface of the bracket 3 for connection with the motherboard. The conductor 2 and the bracket 3 are integrally formed by injection molding. In this embodiment, the conductor 2 is bent, so that the first connecting segment 21 is welded to the motherboard and the second connecting segment 22 is welded to the heating film 12. Compared with the heating film 12 being directly welded to one end of the conductor 2, the welding of the second connecting segment 22 to the heating film 12 is equivalent to increasing the welding area between the conductor 2 and the heating film 12, thereby effectively improving the welding strength between the conductor 2 and the heating film 12.

[0023] Please see Figures 1 to 3In one embodiment, the bracket 3 has a mounting groove 32, the wall of which fits against the outer periphery of the steel pipe 11, and the bottom of which abuts against the bottom of the steel pipe 11. This embodiment, by providing the mounting groove 32, ensures that the wall of the mounting groove 32 fits against the outer periphery of the steel pipe 11, thereby restricting the lateral movement of the steel pipe 11. This prevents lateral displacement of the heating element 11 during use or installation of the heating element 100, thus preventing damage between the heating film 12 and the conductor 2.

[0024] Please see Figures 4 to 7 In one embodiment, the heating element 100 further includes a sealing ring 4, which has a first through hole 41 for the conductor 2 to pass through and is used to fit against the bracket 3. Specifically, the heating film 12 is wrapped around the outer periphery of the steel pipe 11 by coating, sintering, or winding processes. The heating film 12 has reserved leads as connection points for welding with the conductor 2. Then, the conductor 2 is pre-processed into a preset shape and placed into the cavity of the injection mold. Molten injection molding material is injected into the mold, and the conductor 2 is at least partially embedded inside the plastic bracket 3 by insert injection molding process, with only both ends exposed outside the bracket 3. After cooling and solidification, the conductor 2 and the bracket 3 form an integral structure, and the bracket 3 has reserved positioning planes for abutting against the steel pipe 11. The exposed ends of the conductor 2 are welded to the leads by resistance welding or laser welding processes to form an electrical connection path.

[0025] The other end of conductor 2 is soldered to the motherboard pad to complete the circuit connection between heating film 12, conductor 2 and motherboard. Then conductor 2 is passed through the first through hole 41 and sealing ring 4 is attached to bracket 3. At this time, sealing ring 4 is located between bracket 3 and motherboard.

[0026] In this embodiment, the sealing ring 4 can further prevent e-liquid from leaking onto the motherboard. At the same time, the sealing ring 4 can also serve as a waterproofing element, preventing water droplets generated by alternating hot and cold temperatures from falling onto the motherboard and avoiding short circuits on the motherboard, thereby increasing the service life of the heating element 100.

[0027] Please see Figures 8 to 10In one embodiment, the heating element 100 further includes a housing 5, which includes a lower housing 51 and an upper housing 52 connected to each other. The lower housing 51 and the upper housing 52 surround an inner cavity. The heating element 1 and the support 3 are both disposed in the inner cavity. The lower housing 51 has a groove 511 and a second through hole 512 communicating with the groove 511. The second through hole 512 is correspondingly disposed with the first through hole 41. The sealing ring 4 is installed in the groove 511. The upper housing 52 abuts against the top of the steel pipe 11. The upper housing 52 and the lower housing 51 cooperate with each other to fix the heating element 1 and the support 3. Specifically, the sealing ring 4 is installed in the groove 511, at which point the sealing ring 4 is flush with the top of the groove 511. Then, the entire component, which connects the bracket 3, the conductor 2, and the heating element 1, is placed in the inner cavity. Multiple conductors 2 are simultaneously passed through the corresponding first through hole 41 and second through hole 512 in sequence. At this point, the bracket 3 is in contact with the outer periphery of the sealing ring 4 and the groove 511. Then, the lower shell 51 and the upper shell 52 are assembled and locked together. At this point, the upper shell 52 abuts against the top of the steel pipe 11. The upper shell 52 and the lower shell 51 cooperate with each other to clamp the bracket 3 and the heating element 1. This prevents the bracket 3 and the heating element 1 from moving during the use of the heating element 100, ensuring the normal operation of the heating element 100.

[0028] Please see Figures 8 to 10 In one embodiment, the bracket 3 has a first positioning hole 33, the upper housing 52 has a second positioning hole 521, the lower housing 51 has a third positioning hole 513, and the inner hole of the sealing ring 4, the first positioning hole 33, the second positioning hole 521 and the third positioning hole 513 are coaxially arranged. The heating element 100 can be assembled using a concentric rod fixture. Starting from bottom to top, the upper housing 52 is fitted onto the concentric rod fixture through the second positioning hole 521. The bracket 3 is then fitted onto the concentric rod fixture through the first positioning hole 33. The steel pipe 11 is then fitted onto the concentric rod fixture. Next, the lower housing 51 is fitted onto the concentric rod fixture through the third positioning hole 513. Since the sealing ring 4 is installed in the groove 511, its inner hole is coaxial with the third positioning hole 513, and it is also fitted onto the concentric rod fixture. The concentric rod fixture ensures that all components remain concentric. The components are then connected and locked together using screws or bolts. Finally, the concentric rod fixture is removed, completing the assembly of the heating element 100. After assembly, the heating element 100 is soldered to the main board using the conductor 2. This embodiment ensures accurate installation by providing coaxial positioning holes on each component and then using a concentric rod fixture for positioning.

[0029] Please see Figures 8 to 10In one embodiment, the heating element 100 further includes an adapter plate 6, which is soldered to the conductor 2. The adapter plate 6 is provided with pins 61 for soldering to the motherboard to enable electrical connection between the adapter plate 6 and the motherboard. Traditionally, the heating element 100 is not perpendicular to the motherboard. Therefore, to solder the conductor 2 to the motherboard, the conductor 2 needs to be manually bent. This embodiment adds an adapter plate 6, which is a PCB or metal substrate, and has multiple pins 61 arranged according to installation requirements. The conductor 2 is directly connected to the motherboard via the pins 61 and soldered to the motherboard. This reduces the bending process of the conductor 2, further improving production efficiency and enabling automated production.

[0030] Furthermore, a suction sensor can be attached to the adapter board 6, eliminating the need for additional FPC flexible boards or suction sensor connectors, thus simplifying the structure and saving costs.

[0031] Please see Figure 9 In one embodiment, the adapter plate 6 has a welding hole 62 through which the conductor 2 passes and is welded to. This embodiment increases the welding area between the conductor 2 and the adapter plate 6 by welding through the welding hole 62, thereby improving the welding strength between the conductor 2 and the adapter plate 6.

[0032] Furthermore, the heating element 100 also includes screws, the lower housing 51 has a first mounting hole, the upper housing 52 has a second mounting hole, and the adapter plate 6 has a third mounting hole. The bolts pass through the third mounting hole and the first mounting hole in sequence and are installed in the second mounting hole. In this way, the adapter plate 6, the lower housing 51 and the upper housing 52 can be fixedly connected. The bolt fixing can achieve quick installation and disassembly.

[0033] In one embodiment, conductor 2 is a flat nickel wire. The flat nickel wire has a rectangular cross-section, resulting in a larger contact area with the interlocking groove compared to a round nickel wire. During injection molding, the molten plastic can more fully coat the surface of the nickel wire, forming a composite fixing structure of mechanical interlocking and interfacial molecular adhesion. This improves the interlocking strength and avoids the loosening risk caused by the small contact area of ​​traditional round nickel wires. The cross-sectional moment of inertia of the flat nickel wire is higher than that of the round nickel wire of the same material, making it less prone to plastic deformation during insert injection molding. Nickel wire also exhibits better welding performance compared to other metal conductors.

[0034] According to another aspect of this utility model, this utility model also provides an electronic cigarette, including the heating element 100 described above. The electronic cigarette further includes an e-liquid reservoir, an e-liquid guide, and an airflow channel. The e-liquid reservoir stores e-liquid; one end of the e-liquid guide is connected to the e-liquid reservoir, and the other end of the e-liquid guide is used to contact the heating element 100 to deliver the e-liquid; one end of the airflow channel is connected to the atomizing area of ​​the heating element 100, and the other end of the airflow channel extends to the mouthpiece of the electronic cigarette for aerosol flow. The e-liquid in the reservoir is transferred to the heating element 100 through the e-liquid guide. The heating element 100 heats the e-liquid to generate aerosol gas, and then the airflow channel delivers the aerosol gas to the mouthpiece of the electronic cigarette, thereby enabling the user to inhale. Since the electronic cigarette includes all embodiments of the heating element 100 described above, it possesses at least all the beneficial effects brought by all the above embodiments, which will not be elaborated further here.

[0035] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A heating element, characterized in that, include: The heating element includes a steel pipe and a heating film wrapped around the outer periphery of the steel pipe; conductor; A bracket abuts against the bottom of the steel pipe, the conductor is at least partially embedded inside the bracket, both ends of the conductor are exposed to the bracket, and the first end of the conductor is welded to the heating film, and the second end of the conductor is used to weld to the motherboard; The conductor and the bracket are integrally formed by insert injection molding.

2. The heating element as described in claim 1, characterized in that, The conductor is bent to form a first connecting segment and a second connecting segment that are perpendicularly connected to each other. The bracket has a fitting position, which includes a first fitting groove and a second fitting groove that are interconnected. The first connecting segment includes a first end, and the second connecting segment has a second end on the side away from the first connecting segment. The first connecting segment fits into the first fitting groove, and the first end extends out of the first fitting groove. The second connecting segment fits into the second fitting groove, and the second end exposes the second fitting groove.

3. The heating element as described in claim 1, characterized in that, The bracket has an installation groove, the wall of which fits against the outer periphery of the steel pipe, and the bottom of which abuts against the bottom of the steel pipe.

4. The heating element as described in claim 1, characterized in that, The heating element also includes a sealing ring having a first through hole for the conductor to pass through, and the sealing ring is used to fit against the bracket.

5. The heating element as described in claim 4, characterized in that, The heating element further includes a shell, which comprises a lower shell and an upper shell connected to each other. The lower shell and the upper shell enclose an inner cavity. The heating element and the support are both disposed in the inner cavity. The lower shell has a groove and a second through hole communicating with the groove. The second through hole corresponds to the first through hole. The sealing ring is installed in the groove. The upper shell abuts against the top of the steel pipe. The upper shell and the lower shell cooperate with each other to fix the heating element and the support.

6. The heating element as described in claim 5, characterized in that, The bracket has a first positioning hole, the upper housing has a second positioning hole, and the lower housing has a third positioning hole. The inner hole of the sealing ring, the first positioning hole, the second positioning hole, and the third positioning hole are coaxially arranged.

7. The heating element according to any one of claims 1 to 6, characterized in that, The heating element also includes an adapter plate, which is soldered to the conductor. The adapter plate is provided with pins for soldering to the motherboard.

8. The heating element as described in claim 7, characterized in that, The adapter plate has welding holes, through which the conductor passes and is welded to the welding holes.

9. The heating element as described in any one of claims 1 to 6, characterized in that, The conductor is a flat nickel wire.

10. An electronic cigarette, characterized in that, The heating element includes any one of claims 1 to 9.

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