Electronic cigarettes

Abstract

The present application provides an electronic cigarette. The above-mentioned heating unit includes a heating plate, a heating wire coil and a plastic overmolding. The heating plate is provided with an air guide hole; the heating plate covers the heating wire coil, and the heating wire coil is arranged adjacent to the air guide hole; the plastic overmolding is formed on the outer wall of the heating plate, and the plastic overmolding is formed with ventilation holes corresponding to and connected to the air guide hole. Since the heating plate covers the heating wire coil, and the heating wire coil is arranged adjacent to the air guide hole, the heating wire coil heats the heating plate, and since the plastic overmolding is formed on the outer wall of the heating plate, the heating unit is formed in an integrated structure, which reduces the number of components assembled in the heating unit, thereby reducing the number of components of the electronic cigarette; since the heating unit is an integrated structure, the number of components is less than that of the traditional heating unit, and the plastic overmolding is formed on the outer wall of the heating plate, so that the heating unit is tightly connected to the inner wall of the oil cup body, which solves the oil leakage problem of the electronic cigarette.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and in particular to an electronic cigarette. Background Art

[0002] The heating unit of a traditional electronic cigarette includes two ceramic brackets that are arranged opposite to each other and connected to each other. When assembling, it is first supported by the two ceramic brackets, then sealed with a silicone sleeve, and finally loaded into the oil cup. When the electronic cigarette is powered on, the heating wire at the bottom of the heating unit heats up to generate smoke, and the airway on the side isolated by the support structure of the ceramic bracket takes in air in a Z-shaped manner to be guided into the mouthpiece to discharge the mist.

[0003] However, the above-mentioned electronic cigarette has the problem of having too many components, and the assembly error of the electronic cigarette is large, and there is an assembly gap, which causes the electronic cigarette to leak oil. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an electronic cigarette that solves the above technical problems.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A heating unit, comprising:

[0007] A heating plate, wherein the heating plate is provided with air guide holes;

[0008] A heating wire ring, wherein the heating plate covers the heating wire ring, and the heating wire ring is arranged adjacent to the air guide hole;

[0009] The overmolded part is formed on the outer wall of the heating plate, and the overmolded part is formed with ventilation holes corresponding to and connected with the air guide holes.

[0010] In one of the embodiments, the overmolded part is formed on at least one side of the heating plate where the air guide holes are formed.

[0011] In one of the embodiments, the heating wire loop is arranged around the air guide hole.

[0012] In one embodiment, the number of the air guide holes is more than two.

[0013] In one embodiment, the heating unit also includes a thermistor, the heating plate is provided with a mounting hole, the thermistor is located in the mounting hole and connected to the heating plate, and the thermistor is arranged adjacent to the heating wire ring, and the thermistor is used to detect the temperature of the heating plate.

[0014] An oil cup integrated component comprises an oil cup body and a heating unit as described in any one of the above embodiments, wherein the periphery of the overmolded component is connected to the inner wall of the oil cup body.

[0015] In one of the embodiments, the overmolded part is welded to the inner wall of the oil cup body.

[0016] In one of the embodiments, the overmolded part is ultrasonically welded to the inner wall of the oil cup body.

[0017] An electronic cigarette comprises a bottom cover, a nozzle and the oil cup integrated component described in any one of the above embodiments, wherein the bottom cover and the nozzle are respectively connected to two ends of the oil cup integrated component, the bottom cover is provided with a first air inlet hole, the first air inlet hole is connected to the air guide hole, and the nozzle is connected to the ventilation hole.

[0018] In one embodiment, the electronic cigarette further includes a top plug and an air duct, wherein the top plug blocks the end of the oil cup adjacent to the suction nozzle, and the top plug is sleeved on the air duct, the ventilation hole is connected to the suction nozzle through the air duct, and the end of the air duct away from the suction nozzle abuts against the overmolded part.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] 1. Since the heating plate covers the heating wire coil, and the heating wire coil is arranged near the air guide hole, the heating wire coil heats the heating plate. Since the plastic package is formed on the outer wall of the heating plate, the heating unit is formed in an integrated structure, which reduces the number of components assembled in the heating unit, thereby reducing the number of components of the electronic cigarette;

[0021] 2. Since the heating unit is an integrated structure, the number of components is less than that of the traditional heating unit, and the plastic package is formed on the outer wall of the heating plate, so that the heating unit is closely connected to the inner wall of the oil cup body, solving the oil leakage problem existing in the electronic cigarette;

[0022] 3. Since the heating plate is provided with air guide holes, and the overmolded part is provided with ventilation holes corresponding to the air guide holes, the airflow on one side of the heating plate can flow out of the other side of the heating plate through the air guide holes and the ventilation holes in sequence, thereby realizing the linear air intake of the heating unit. Compared with the traditional Z-shaped air intake, the air intake path of the electronic cigarette is greatly shortened, thereby reducing the problem of smoke accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of an electronic cigarette in one embodiment;

[0025] Figure 2 for Figure 1 A cross-sectional view of the electronic cigarette shown;

[0026] Figure 3 for Figure 2 Schematic diagram of the explosion of the electronic cigarette shown;

[0027] Figure 4 for Figure 3 A schematic diagram of a heating unit of the electronic cigarette shown;

[0028] Figure 5 for Figure 4 A partial cross-sectional view of the heating unit is shown. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] like Figure 1 and Figure 2As shown, an electronic cigarette 10 of an embodiment includes a bottom cover 100, a suction nozzle 200 and an oil cup integrated part 300. The oil cup integrated part 300 includes an oil cup body 310 and a heating unit 320. The bottom cover 100 and the suction nozzle 200 are respectively connected to the two ends of the oil cup body 310, so that the bottom cover 100 is connected to the suction nozzle 200 through the oil cup integrated part 300. The heating unit 320 includes a heating plate 322, a heating wire coil 324 and a plastic package 326. The heating plate 322 is provided with an air guide hole 322a. The heating plate 322 covers the heating wire coil 324, and the heating wire coil 324 is arranged adjacent to the air guide hole 322a. In this embodiment, the heating wire coil 324 is partially covered in the heating plate 322, and the heating wire coil 324 is partially exposed outside the heating plate 322, so that the heating wire coil 324 can be connected to an external power source. The over-molded component 326 is formed on the outer wall of the heating plate 322 , and the over-molded component 326 is formed with ventilation holes 326 a correspondingly communicating with the air guide holes 322 a .

[0033] like Figure 2 As shown, in one embodiment, the periphery of the overmolding 326 is connected to the inner wall of the oil cup body 310. In this embodiment, the oil cup body 310 is provided with a receiving cavity 312, and the receiving cavity 312 contains oil. The heating unit 320 is located in the receiving cavity 312 and is connected to the oil cup body 310. The bottom cover 100 is provided with a first air inlet 110. The air guide hole 322a is connected with the first air inlet 110, so that the air outside the bottom cover 100 enters the air guide hole 322a through the first air inlet 110. Since the air guide hole 322a is correspondingly connected with the ventilation hole 326a, the airflow on the side of the heating plate 322 adjacent to the first air inlet 110 flows out of the other side of the heating plate 322 through the air guide hole 322a and the ventilation hole 326a in turn.

[0034] When the heating coil 324 is powered on, the heating coil 324 heats the heating plate 322, so that the oil in the accommodating cavity 312 is heated and vaporized when in contact with the heating unit 320, and the vaporized oil smoke flows into the suction nozzle 200 through the airflow, thereby making the oil smoke have a better atomization effect. The overmolding 326 is formed on the outer wall of the heating plate 322, so that the heating unit 320 forms an integrated structure, even if the heating unit 320 forms a single component, it greatly saves the materials and processes for assembly, and reduces labor and errors caused by assembly. In this embodiment, the first air inlet 110 is connected to the air guide hole 322a, and the suction nozzle 200 is connected to the ventilation hole 326a.

[0035] The electronic cigarette 10, the oil cup integrated component 300 and the heating unit 320 described above, because the heating plate 322 covers the heating wire coil 324, and the heating wire coil 324 is arranged near the air guide hole 322a, so that the heating wire coil 324 heats the heating plate 322, and because the overmolding 326 is formed on the outer wall of the heating plate 322, the heating unit 320 is formed in an integrated structure, which reduces the number of components assembled in the heating unit 320, thereby reducing the components of the electronic cigarette 10, saving assembly materials and processes, and thereby reducing the labor input in the production of the electronic cigarette 10; because the heating unit 320 is an integrated structure, the number of components is less than that of the traditional heating unit 320, and the overmolding 326 is formed on the outer wall of the heating plate 322, so that the heating unit 320 is tightly connected to the inner wall of the oil cup body 310, reducing the assembly error of the electronic cigarette 10 and solving the oil leakage problem of the electronic cigarette 10. Since the heating plate 322 is provided with an air guide hole 322a, and the overmolded part 326 is formed with a ventilation hole 326a corresponding to and connected to the air guide hole 322a, the airflow on one side of the heating plate 322 can flow out of the other side of the heating plate 322 through the air guide hole 322a and the ventilation hole 326a, thereby realizing a linear air intake of the heating unit 320. Compared with the traditional Z-shaped air intake, the air intake path of the electronic cigarette 10 is greatly shortened, thereby reducing the problem of smoke accumulation.

[0036] like Figure 2 As shown, in one embodiment, the overmolding 326 is formed on at least one side of the heating plate 322 with the air guide hole 322a, so that the overmolding 326 is connected to the heating plate 322 to form an integrated structure, and then the periphery of the heating unit 320 is in contact with the inner wall of the accommodating cavity 312, reducing the problem of assembly gap at the connection between the heating unit 320 and the inner wall of the accommodating cavity 312, ensuring the air tightness of the oil cup integrated component 300, and better solving the oil leakage problem of the electronic cigarette 10. In this embodiment, the overmolding 326 is an elastic plastic part, and the oil cup body 310 is a plastic part, so that the overmolding 326 is closely connected to the inner wall of the oil cup body 310, and the tightness of the connection between the heating unit 320 and the inner wall of the accommodating cavity 312 is improved. In this embodiment, the heating plate has a rectangular structure, and the over-molded parts are formed on the five sides of the heating plate, that is, there is no over-molded part formed on the side of the heating plate adjacent to the bottom cover, and the other sides of the heating plate are all formed with over-molded parts, so that the heating plate and the over-molded parts are firmly connected, and the over-molded parts are better connected to the oil cup body.

[0037] like Figure 2 and Figure 3As shown, further, the overmolded part 326 is formed on the heating plate 322 through an injection molding process, so that the connection structure between the overmolded part 326 and the heating plate 322 is relatively simple and easy to manufacture, and the cost of molding the overmolded part 326 on the heating plate 322 is reduced. Specifically, the overmolded part 326 is injection molded on the heating plate 322 in an injection mold, which can ensure that the shape and position accuracy of the heating unit 320 after molding is within 0.05mm, and it is easy to realize automated production line production, improve the production efficiency of the electronic cigarette 10, and save the cost of the electronic cigarette 10. In one embodiment, the material of the overmolded part 326 is polyetheretherketone, that is, a semi-crystalline thermoplastic plastic, so that the overmolded part 326 has good high temperature resistance, and thus the overmolded part 326 and the heating plate 322 are not easy to deform or even melt when the overmolded part 326 is integrally injection molded.

[0038] Furthermore, the heating plate is provided with a connection hole on one side of the molded overmolded part, and the overmolded part is partially molded in the connection hole, so that the overmolded part and the heating plate are firmly connected. Specifically, the connection hole is L-shaped, so that the connection between the overmolded part and the heating plate is more firmly connected. In order to further improve the tightness of the connection between the heating plate and the overmolded part, a plurality of attachment point grooves are also provided on the inner wall of the connection hole, and the plurality of attachment point grooves are distributed at intervals, so that the overmolded part is partially molded in the attachment point grooves, thereby making the connection between the heating plate and the overmolded part more tightly.

[0039] like Figure 4 and Figure 5 As shown, in order to improve the heating effect of the oil, in one embodiment, the heating wire coil 324 is arranged around the air guide hole 322a, so that the surrounding of the air guide hole 322a is heated quickly and evenly, thereby improving the heating efficiency of the heating plate 322, which is conducive to improving the heating effect of the oil. It can be understood that in other embodiments, the heating wire coil 324 is not limited to being arranged around the air guide hole 322a. In one embodiment, the heating wire coil 324 is S-shaped or straight-shaped or other shapes.

[0040] In the present embodiment, the heating wire coil is an annular conductive plate, and the heating wire coil is partially buried in the heating plate, so that the heat generated by the heating wire coil can be quickly transferred to the heating plate, thereby increasing the rate at which the heating wire coil heats the heating plate. In the present embodiment, the heating plate is a ceramic plate. In order to wrap the heating wire coil around the heating plate, it is necessary to pre-position the heating wire coil by a positioning fixture during molding, pour ceramic slurry, and after the heating plate is molded and solidified for a certain period of time, remove the positioning fixture, and then pour ceramic slurry again, which cannot well ensure the relative stillness of the heating plate and the heating wire coil. Furthermore, the heating plate includes a plate body and a fixed column, and the heating wire coil is provided with a positioning hole. The fixed column is inserted into the positioning hole and connected to the heating wire coil, so that the fixed column and the heating wire coil are relatively positioned, and the plate body is respectively molded on the fixed column and the heating wire coil, so that the heating plate is respectively molded on the heating wire coil with high precision. Specifically, the plate body and the fixed column are both made of ceramic. During molding, the fixing column is molded first; then the fixing column is supported and inserted into the positioning hole of the heating wire loop so that the fixing column and the heating wire loop are relatively stationary; then the plate body is molded so that the plate body is molded on the fixing column and the heating wire loop respectively; finally, the heating plate is cured.

[0041] In order to better shape and connect the plate body to the fixed column, further, a spiral groove in a spiral shape is opened on the peripheral wall of the fixed column, and the plate body is partially formed in the spiral groove and connected to the fixed column, so that the connection area between the plate body and the fixed column is larger, and at the same time, the plate body and the fixed column are tightly connected, thereby improving the reliability of the connection between the plate body and the fixed column. Further, a plurality of concave grooves connected to the spiral groove are opened on the peripheral wall of the fixed column, and the plate body is partially formed in the concave groove, further increasing the connection area between the plate body and the fixed column, and at the same time, making the connection between the plate body and the fixed column tighter.

[0042] like Figure 4 As shown, in one embodiment, the number of the air guide holes 322a is more than two, so that the airflow on one side of the heating unit 320 quickly flows into the other side of the heating unit 320 through the air guide holes 322a. In this embodiment, the number of the air guide holes 322a is multiple, and the multiple air guide holes 322a are arranged side by side. Specifically, the multiple air guide holes 322a are distributed in a rectangular array. In other embodiments, the multiple air guide holes 322a are not limited to being distributed in a rectangular array, but can also be distributed in a circular array.

[0043] like Figure 1 , Figure 3 and Figure 4As shown, in one embodiment, the heating unit 320 also includes a thermistor 328, the heating plate 322 is provided with a mounting hole 322b, the thermistor 328 is located in the mounting hole 322b and connected to the heating plate 322, and the thermistor 328 is arranged adjacent to the heating wire coil 324, and the thermistor 328 is used to detect the temperature of the heating plate 322. When the thermistor 328 detects the preset temperature, the atomization of the smoke oil reaches the best effect, and the current passing through the thermistor 328 is controlled by feedback to ensure that the heating plate 322 is maintained at the best temperature for the atomization of the smoke oil, thereby ensuring the consistency of the taste and saving the power consumption of the electronic cigarette 10. In this embodiment, the thermistor 328 is an NTC temperature sensor. The thermistor is also in contact with the heating wire coil, so that the temperature of the heating wire coil is directly transmitted to the thermistor, thereby improving the detection accuracy of the thermistor. Specifically, the heating wire coil is provided with a fixing hole, the thermistor is inserted into the fixing hole and abuts against the heating wire coil, so that the thermistor and the heating wire coil are reliably abutted, thereby improving the detection accuracy of the thermistor.

[0044] Furthermore, the electronic cigarette 10 also includes a control module (not shown) and a power supply module (not shown), the control module is electrically connected to the power supply module and the thermistor 328 respectively, the power supply module is electrically connected to the heating coil 324, and the control module is used to control the current passing through the heating coil 324. When the thermistor 328 detects a preset temperature, the atomization of the smoke oil reaches the best effect, the thermistor 328 feeds back an induction signal to the control module, and the control module controls the power supply module to maintain a constant current supply to the heating coil 324 to ensure that the heating plate 322 is maintained at the best temperature for the atomization of the smoke oil, thereby ensuring the consistency of the taste and saving the power consumption of the electronic cigarette 10.

[0045] It should be noted that the resistance of the heating coil 324 can be flexibly selected, such as 0.3Ω or 0.6Ω or 0.9Ω or 1.2Ω, etc. Correspondingly, the heating unit 320 can be adjusted by controlling the output of a predetermined voltage by the control module. In this embodiment, the predetermined voltage can be any value of 2.8V~3.4V, thereby meeting the requirements of the atomizer in the range of 6.8W~38W, thereby improving the applicability of the heating unit 320 and saving the procurement, transportation, management and manufacturing costs of the electronic cigarette 10. Of course, in other embodiments, the predetermined voltage is not limited to any value of 2.8V~3.4V, but can also be other values.

[0046] like Figure 2As shown, in one embodiment, the periphery of the overmolding 326 is welded to the inner wall of the oil cup body 310, so that the periphery of the overmolding 326 is reliably connected to the inner wall of the oil cup body 310, and the tightness of the connection between the periphery of the overmolding 326 and the inner wall of the oil cup body 310 is improved, so that the oil cup body 310 and the heating unit 320 are combined into one component, further reducing the number of components of the electronic cigarette 10. Since the overmolding 326 is directly welded to the oil cup body 310, there is no assembly gap between the overmolding 326 and the oil cup body 310.

[0047] like Figure 2 As shown, further, the overmolded part 326 is ultrasonically welded to the inner wall of the oil cup body 310, so that the overmolded part 326 is ultrasonically hot-melt welded to the inner wall of the oil cup body 310, thereby improving the connection strength between the overmolded part 326 and the inner wall of the oil cup body 310. In this embodiment, the heating plate 322 is a ceramic plate, the overmolded part 326 is a polyetheretherketone part, the heating plate 322 is coated on the heating wire ring 324, and the overmolded part 326 is formed on the heating plate 322 to form a heating unit 320. Since the overmolded part 326 is ultrasonically welded to the inner wall of the oil cup body 310, the overmolded part 326 and the oil cup body 310 are connected to form a single component, and the oil cup integrated part 300 manufactured in this way does not have an assembly gap at all, which solves the problem of oil leakage of the electronic cigarette 10.

[0048] In one of the embodiments, the preparation method of the oil cup assembly of any of the above embodiments includes the following steps: first, positioning the heating wire coil 324 and the thermistor 328 in a first mold; then, preparing ceramic slurry, and pouring the ceramic slurry into the first mold and curing it, so that the ceramic slurry is coated around the heating wire coil 324 and the thermistor 328 to form a semi-finished heating unit 320; then, placing the semi-finished heating unit 320 in a second mold, and injection molding the overmolded part 326 on the outer wall of the heating plate 322 to form the heating unit 320; finally, ultrasonically welding the heating unit 320 to the inner wall of the oil cup body 310, that is, ultrasonically welding the overmolded part 326 to the inner wall of the oil cup body 310, so that the oil cup body 310 and the heating unit 320 are combined into one component, which greatly reduces the number of components of the oil cup assembly 300 and avoids the problem of assembly gap of the oil cup assembly 300, thereby effectively solving the problem of oil leakage.

[0049] like Figure 2 and Figure 3As shown, the electronic cigarette 10 further includes a top plug 400 and an air guide tube 500. The top plug 400 blocks the end of the oil cup body 310 adjacent to the suction nozzle 200, and the top plug 400 is sleeved on the air guide tube 500. The top plug abuts against the suction nozzle, so that the suction nozzle presses the top plug against the end of the oil cup, so that the top plug is not easy to loosen from the oil cup. The ventilation hole 326a is connected to the suction nozzle 200 through the air guide tube 500, and the end of the air guide tube 500 away from the suction nozzle 200 abuts against the plastic package 326, so that the airflow through the air guide hole 322a completely flows from the air guide tube 500 to the suction nozzle 200, reducing the situation of air leakage of the electronic cigarette 10. In this embodiment, the air duct 500 is located in the accommodating cavity 312, and the top plug 400 is partially located in the accommodating cavity 312 to block the end of the oil cup adjacent to the suction nozzle 200, and the top plug 400 is sleeved on the air duct 500, so that the oil in the accommodating cavity 312 will not leak out through the end of the oil cup adjacent to the suction nozzle 200, and the end of the air duct 500 away from the suction nozzle 200 abuts against the oil cup assembly 300, so that the oil in the accommodating cavity 312 will not flow into the air duct 500 or even be sucked out from the suction nozzle 200, so that the oil must be heated and vaporized by the heating unit 320, thereby improving the atomization effect of the electronic cigarette 10.

[0050] In order to make the air duct tightly abut against the overmolded part, further, an elastic rubber layer is provided at the end of the air duct adjacent to the overmolded part, and the elastic rubber layer elastically abuts against the overmolded part, so that the air duct and the overmolded part are tightly abutted, thereby improving the sealing of the abutment between the air duct and the overmolded part and preventing oil from leaking between the air duct and the overmolded part.

[0051] like Figure 2 and Figure 5 As shown, further, the oil cup body 310 includes an oil cup shell 310a and an annular extension 310b, and the accommodating cavity 312 is opened along the axial direction of the oil cup shell 310a. The top plug 400 blocks the end of the oil cup shell 310a adjacent to the suction nozzle 200, so that the top plug 400 is connected to the oil cup shell 310a. The oil cup shell 310a is also connected to the bottom cover 100. The annular extension 310b is located in the accommodating cavity 312 and connected to the inner wall of the oil cup shell 310a, and the annular extension 310b is arranged adjacent to the bottom cover 100. The overmolded part 326 is tightly connected to the annular extension 310b, so that the airflow on the side of the heating unit 320 adjacent to the bottom cover 100 can only pass through the air guide hole 322a of the heating plate 322 of the heating unit 320. In this embodiment, the annular extension 310b is formed with an annular groove 312b, the heating unit 320 is located in the annular groove 312b, and the periphery of the overmolded part 326 is tightly connected to the annular extension 310b. The ventilation holes are respectively connected to the air guide holes 322a and the air guide pipe 500, so that the airflow on the side of the heating unit 320 adjacent to the bottom cover 100 passes through the air guide holes 322a and the ventilation holes in sequence and enters the air guide pipe 500.

[0052] like Figure 2 and Figure 5 As shown, further, the periphery of the overmolded part 326 is welded to the annular extension part 310b, so that the periphery of the overmolded part 326 is tightly connected to the annular extension part 310b, thereby preventing the oil from leaking from the gap between the periphery of the heating unit 320 and the annular extension part 310b. In addition, the top plug 400 is plugged at the end of the oil cup shell 310a adjacent to the suction nozzle 200, thereby preventing the oil from leaking from one side of the suction nozzle 200. Specifically, the periphery of the overmolded part 326 is ultrasonically welded to the annular extension part 310b, thereby preventing the oil from leaking from one side of the suction nozzle 200.

[0053] like Figure 2 As shown, further, the oil cup shell 310a and the annular extension 310b are integrally formed, so that the structure of the oil cup body 310 is more compact and the molding of the oil cup body 310 is convenient. In this embodiment, the oil cup shell 310a and the annular extension 310b are integrally injection molded, so that the structure of the oil cup body 310 is simple and easy to manufacture, and it is also convenient to subsequently ultrasonically weld the overmolded part 326. Specifically, the oil cup body 310 is a plastic part, so that the oil cup body 310 and the overmolded part 326 can be better ultrasonically welded.

[0054] In order to better connect the overmolded part with the annular extension, further, an annular protrusion is provided on the peripheral wall of the overmolded part. When the peripheral edge of the overmolded part 326 is welded to the annular extension, the contact area between the overmolded part and the annular extension is larger, thereby making the welding between the overmolded part and the annular extension more secure. In this embodiment, there are multiple annular protrusions, and the multiple annular protrusions are arranged at intervals, so that the overmolded part and the annular extension are better connected. Furthermore, the cross section of the annular protrusion is sawtooth or trapezoidal.

[0055] In order to better connect the overmolded part to the annular extension portion, the annular extension portion is further provided with a positioning groove connected to the annular groove. The overmolded part is located in the positioning groove and connected to the annular extension portion, so that the connection between the overmolded part and the annular extension portion is more secure, thereby enabling the overmolded part to be better connected to the annular extension portion.

[0056] like Figure 2 and Figure 5As shown, in order to further improve the atomization effect of the electronic cigarette 10, an oil leakage hole 326b connected to the annular groove 312b is formed on the inner wall of the plastic package 326 adjacent to the suction nozzle 200, and the heating plate 322 is partially exposed to the oil leakage hole 326b, so that the oil leakage hole 326b is connected to the accommodating cavity 312 through the annular groove 312b, so that the oil in the accommodating cavity 312 can flow to the heating plate 322 through the oil leakage hole 326b, thereby improving the efficiency of the heating unit 320 heating the oil, and thus improving the atomization effect of the electronic cigarette 10. Furthermore, the number of the oil leakage holes 326b is multiple, and the multiple oil leakage holes 326b are arranged around the ventilation hole, so that the oil can leak into the surface of the heating plate 322 through the multiple oil leakage holes 326b for rapid heating, further improving the atomization effect of the electronic cigarette 10.

[0057] like Figure 2 and Figure 3 As shown, in this embodiment, the oil cup shell 310a is detachably connected to the bottom cover 100, so as to maintain the electronic cigarette 10. Specifically, the oil cup shell 310a is snap-connected to the bottom cover 100, so that the oil cup shell 310a is detachably connected to the bottom cover 100, so as to maintain or clean the electronic cigarette 10. In order to snap-connect the oil cup shell 310a to the bottom cover 100 and reduce the number of openings of the bottom cover 100, further, the end of the oil cup shell 310a adjacent to the bottom cover 100 is convexly provided with a first hook 312a, and the first hook 312a is snap-connected to the first air inlet 110, so that the oil cup shell 310a is snap-connected to the bottom cover 100, and then the oil cup shell 310a is detachably connected to the bottom cover 100. In this embodiment, the oil cup shell 310a is provided with a second air inlet hole 313a, and the first air inlet hole 110 and the air guide hole 322a are both connected to the second air inlet hole 313a, so that the first air inlet hole 110 is connected to the air guide hole 322a. Specifically, the second air inlet hole 313a is provided at a location where the first hook 312a is protruding from the oil cup shell 310a, so that the second air inlet hole 313a is connected to the first air inlet hole 110, and at the same time, the strength of the buckle connection between the oil cup shell 310a and the bottom cover 100 is ensured.

[0058] like Figure 2 and Figure 3 As shown, in order to connect the first air inlet hole 110 with the air guide hole 322a, further, an air inlet cavity 120 is opened on the bottom cover 100, and the first air inlet hole 110 is connected with the air inlet cavity 120 through the second air inlet hole 313a, and the air inlet cavity 120 is connected with the air guide hole 322a, so that the first air inlet hole 110 is connected with the air guide hole 322a.

[0059] It is understood that in other embodiments, the oil cup shell 310a and the bottom cover 100 are not limited to a detachable connection. In order to improve the tightness of the connection between the oil cup shell 310a and the bottom cover 100 and better avoid the problem of oil leakage of the electronic cigarette 10, in one embodiment, the oil cup shell 310a and the bottom cover 100 are welded together, that is, the oil cup shell 310a and the bottom cover 100 are welded, so that the oil cup shell 310a and the bottom cover 100 are tightly connected, which improves the tightness of the connection between the first air inlet 110 and the air guide hole 322a, while reducing the number of components of the electronic cigarette 10, and further reducing the assembly error of the electronic cigarette 10.

[0060] In one embodiment, the oil cup shell 310a is ultrasonically welded to the bottom cover 100, so that the oil cup shell 310a is tightly and firmly connected to the bottom cover 100. In this embodiment, the oil cup shell 310a is ultrasonically welded to the bottom cover 100, and the annular extension 310b is ultrasonically welded to the heating unit 320. In addition, the oil cup body 310 is an integrally formed structure, so that the oil cup body 310 is tightly connected to the bottom cover 100 and the annular extension 310b, respectively, and the problem of easy oil leakage of the electronic cigarette 10 is avoided. The oil cup body 310 and the bottom cover 100 are both plastic parts, so that the oil cup assembly 300 and the bottom cover 100 are better ultrasonically welded.

[0061] like Figure 2 As shown, further, the electronic cigarette 10 also includes a conductive elastic pin 600, and a connection hole 130 communicating with the air inlet cavity 120 is opened on the bottom cover 100. The conductive elastic pin 600 is inserted into the connection hole 130 and connected to the bottom cover 100, and the conductive elastic pin 600 is electrically connected to the heating wire coil 324, so that the heating wire coil 324 is electrically connected to the power supply module through the conductive elastic pin 600. In this embodiment, the heating wire coil 324 is partially exposed on the periphery of the heating plate 322. The conductive elastic pin 600 elastically abuts against the heating wire coil 324, so that the conductive elastic pin 600 is electrically connected to the heating wire coil 324.

[0062] It should be noted that in other embodiments, the heating wire coil 324 can also be completely buried in the heating plate. In one embodiment, the heating unit also includes a conductive column, which is partially located in the heating plate and electrically connected to the heating wire coil. The conductive spring pin abuts against the conductive column to electrically connect the heating wire coil to the power supply module. Since the heating wire coil is completely located in the heating plate, the distance from the heating wire coil to the side of the heating plate adjacent to the suction nozzle is shorter, thereby increasing the rate at which the heating wire coil heats the heating plate.

[0063] like Figure 2 and Figure 3As shown, further, the suction nozzle 200 is detachably connected to the oil cup body 310, so as to regularly add oil to the accommodating chamber 312, or clean the accommodating chamber 312, thereby improving the convenience of using the electronic cigarette 10. In this embodiment, the suction nozzle 200 is snap-connected to the oil cup body 310, so that the suction nozzle 200 and the oil cup body 310 are detachably connected. Further, the end of the oil cup body 310 adjacent to the suction nozzle 200 is convexly provided with a second hook 315, and the suction nozzle 200 is provided with a slot 210, and the second hook 315 is snap-connected into the slot 210, so that the oil cup body 310 and the suction nozzle 200 are snap-connected.

[0064] Compared with the prior art, the present invention has at least the following advantages:

[0065] 1. Since the heating plate 322 covers the heating coil 324, and the heating coil 324 is arranged adjacent to the air guide hole 322a, the heating coil 324 heats the heating plate 322. Since the overmolding member 326 is formed on the outer wall of the heating plate 322, the heating unit 320 is formed in an integrated structure, which reduces the number of components assembled in the heating unit 320, thereby reducing the number of components of the electronic cigarette 10.

[0066] 2. Since the heating unit 320 is an integrated structure, the number of components is less than that of the conventional heating unit 320, and the overmolded part 326 is formed on the outer wall of the heating plate 322, so that the heating unit 320 is tightly connected to the inner wall of the oil cup body 310, thereby solving the oil leakage problem existing in the electronic cigarette 10;

[0067] 3. Since the heating plate 322 is provided with an air guide hole 322a, and the overmolded part 326 is formed with a ventilation hole 326a corresponding to the air guide hole 322a, the airflow on one side of the heating plate 322 can flow out of the other side of the heating plate 322 through the air guide hole 322a and the ventilation hole 326a, thereby realizing the linear air intake of the heating unit 320. Compared with the traditional Z-shaped air intake, the air intake path of the electronic cigarette 10 is greatly shortened, thereby reducing the problem of smoke accumulation.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An electronic cigarette, characterized in that: The invention comprises a bottom cover, a suction nozzle and an oil cup assembly, wherein the bottom cover and the suction nozzle are respectively connected to two ends of the oil cup assembly, and the bottom cover is provided with a first air inlet hole; the oil cup assembly comprises an oil cup body and a heating unit, and the heating unit comprises: A heating plate, wherein the heating plate is provided with air guide holes; A heating wire ring, wherein the heating plate covers the heating wire ring, and the heating wire ring is arranged adjacent to the air guide hole; The overmolded part is formed on the outer wall of the heating plate, and the overmolded part is formed with ventilation holes corresponding to and communicating with the air guide holes; the overmolded part is formed on the heating plate by injection molding; the heating plate is provided with a connecting hole on one side of the formed overmolded part, and the overmolded part is partially formed in the connecting hole; the periphery of the overmolded part is connected to the inner wall of the oil cup body; The electronic cigarette further comprises a top plug and an air guide tube, wherein the top plug blocks the end of the oil cup body adjacent to the suction nozzle, and the top plug is sleeved on the air guide tube; the top plug abuts against the suction nozzle, the ventilation hole is connected with the suction nozzle through the air guide tube, and the end of the air guide tube away from the suction nozzle abuts against the plastic package; the air guide tube is located in the accommodating cavity, and the top plug part is located in the accommodating cavity to block the end of the oil cup adjacent to the suction nozzle; The oil cup body includes an oil cup shell and an annular extension portion, the accommodating cavity is opened along the axial direction of the oil cup shell; the top plug is blocked at the end of the oil cup shell adjacent to the suction nozzle; the oil cup shell is also connected to the bottom cover; the annular extension portion is located in the accommodating cavity and connected to the inner wall of the oil cup shell, and the annular extension portion is arranged adjacent to the bottom cover; the overmolded part is tightly connected to the annular extension portion; the annular extension portion is formed with an annular groove, the heating unit is located in the annular groove, and the periphery of the overmolded part is tightly connected to the annular extension portion; the ventilation hole is also connected to the air guide hole; the periphery of the overmolded part is welded to the annular extension portion, and the first air inlet hole is connected to the air guide hole.

2. The electronic cigarette according to claim 1, characterized in that: The overmolded component is formed at least on one side of the heating plate where the air guide holes are provided.

3. The electronic cigarette according to claim 1, characterized in that: The heating wire loop is arranged around the air guide hole.

4. The electronic cigarette according to claim 3, characterized in that: The number of the air guide holes is more than two.

5. The electronic cigarette according to any one of claims 1 to 4, characterized in that: The heating unit also includes a thermistor. The heating plate is provided with a mounting hole. The thermistor is located in the mounting hole and connected to the heating plate. The thermistor is arranged adjacent to the heating wire ring and is used to detect the temperature of the heating plate.

6. The electronic cigarette according to claim 1, characterized in that: The overmolded component is welded to the inner wall of the oil cup body.

7. The electronic cigarette according to claim 6, characterized in that: The overmolded part is ultrasonically welded to the inner wall of the oil cup body.

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