CN113115987A

CN113115987A - Atomizing core and cigarette bullet

Info

Publication number: CN113115987A
Application number: CN202110430804.5A
Authority: CN
Inventors: 李亚勇
Original assignee: Dongguan Alpha Electronic Technology Co ltd
Current assignee: Dongguan Alpha Electronic Technology Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-16

Abstract

The utility model provides an atomizing core, including the shell that is equipped with the chamber of acceping that link up from top to bottom, wrap up in the porous body of acceping the intracavity of shell and locating the heating element of porous body bottom surface, the porous body include with the first surface of atomized liquid contact and with the second surface that the first surface is relative, the first surface is for inhaling the liquid level, the second surface is the atomized surface, heating element locates on the atomized surface, the atomized liquid is followed inhale the liquid level and permeate to the atomized surface, heating element heating on the atomized surface, heat conduction extremely will in the porous body atomized liquid atomizes. The application also includes a cartridge.

Description

Atomizing core and cigarette bullet

Technical Field

The application relates to the field of electronic cigarettes, in particular to an atomizing core and a cigarette cartridge.

Background

The key part of tobacco tar atomizing type electron cigarette lies in the atomizer, and the atomizer needs the atomizing core of a infiltration tobacco tar, and the atomizing core adopts organic cotton material originally, but the easy problem of scorching that appears of organic cotton to produce the peculiar smell and influence the use. In order to solve the technical problems, the technical scheme of adopting the ceramic porous body as the atomizing core is also provided in the industry, the ceramic atomizing core cannot be burnt, and meanwhile, the filtering performance is more stable compared with that of a cotton core. The cigarette cartridge disclosed in the patent CN211020987U adopts a ceramic atomizing core, which is generally divided into a liquid absorbing surface and an atomizing surface, and the tobacco tar permeates to the atomizing surface through the liquid absorbing surface to be heated and atomized, but the porous ceramic also has some disadvantages, firstly, the porous ceramic is brittle and easy to crack, and needs a thicker strength support, and the heater is printed on the bottom surface of the porous ceramic, and the porous ceramic bears a supporting force and is easy to crack, so that the heater is cracked to form an open circuit, thereby affecting the atomization of the tobacco tar; secondly, the porous ceramic is generally fired by clay, tobacco tar is easy to carry a mud taste after being atomized by the porous ceramic, and the reduction degree of the tobacco tar is not as good as that of the cotton core.

Meanwhile, the technical problem of oil leakage, namely the problem of oil leakage, of the smoke bomb product always exists, a porous ceramic substrate is adopted as a liquid seepage device for the common atomizing core, atomized liquid permeates through the porous ceramic substrate, and atomized liquid in the porous ceramic substrate is atomized into smoke after heating. The outside of porous ceramic base member need wrap up in order to prevent the oil leak with materials such as sealing silica gel, nevertheless still has the oil leak phenomenon in-service use, still need set up the balanced air flue in the intercommunication stock solution intracavity simultaneously in order to guarantee that the atmospheric pressure in the stock solution intracavity is balanced. The porous ceramic matrix is easy to deform in the using process, micropores are formed in the periphery of the porous ceramic matrix and communicated with each other, so that the sealing is not tight, and a serious oil leakage condition is formed.

Disclosure of Invention

In view of the above, it is desirable to provide an atomizing core and a cartridge having a housing for protecting a porous body, which can prevent the porous body from being fragile, and which can solve the problem of oil leakage in the atomizing core.

For solving above-mentioned technical problem, the application provides an atomizing core, including the shell that is equipped with the chamber of acceping that link up from top to bottom, wrap up in the porous body of the intracavity of acceping of shell and locating the heating element of porous body bottom surface, the porous body include with the atomized liquid contact the first surface and with the relative second surface of first surface, the first surface is for inhaling the liquid level, the second surface is the atomising surface, heating element locates on the atomising surface, the atomized liquid is followed inhale the liquid level and permeate to the atomising surface, the heating element heating on the atomising surface, the heat conduction extremely in the porous body will the atomized liquid atomizes.

Preferably, the housing is a rigid material, and the atomizing core bears a holding supporting force through the housing to be fixed in the atomizing device.

Preferably, the housing is formed by stretching a stainless steel plate, and comprises a seamless housing and the accommodating cavity, the edge of the bottom side of the housing is connected with a material belt, and the porous body slurry and the heating element material are filled in the accommodating cavity and then sintered and formed.

Preferably, the height of the shell is larger than that of the porous body, so that the thickness of the porous body is reduced.

Preferably, the atomizing core further includes an insulating heat conduction layer disposed on the second surface of the porous body, the heating element is disposed on the insulating heat conduction layer, a lower groove is disposed on the second surface of the porous body, the insulating heat conduction layer is coated in the lower groove, the insulating heat conduction layer is made of porous ceramic, the porous body is made of porous metal, the porous body is formed by mixing metal powder and organic material and sintering, the organic material in the metal powder is ablated to form a microporous structure, and the porous ceramic is formed by mixing ceramic powder and organic material and sintering to remove the organic material.

Preferably, the first surface of the porous body is concavely formed with an upper groove, and the periphery of the upper groove is formed with a side wall.

Preferably, the pores in the porous body have a pore size ranging between 15-22um and a porosity ranging between 50% -60%.

Preferably, the pores in the porous body have a pore size ranging between 18-20um and a porosity ranging between 54% -55%.

Preferably, the insulating heat conduction layer is made of porous ceramic, and a microporous structure is formed inside the insulating heat conduction layer.

Preferably, the porous body is a porous ceramic material, and the porous ceramic is formed by mixing ceramic powder and an organic material and then sintering to remove the organic material.

In order to solve the technical problem, the present application further provides a cartridge, which includes a cartridge tube having a flue tube and a liquid storage cavity, a sealing body installed in the cartridge tube and sealing the liquid storage cavity, an atomizing core installed in the sealing body, and a base fixed to the cartridge tube for limiting the sealing body, wherein the atomizing core includes a housing having an accommodating cavity penetrating from top to bottom, a porous body wrapped in the accommodating cavity of the housing, and a heating element disposed on a bottom surface of the porous body, the porous body is made of a porous metal material, the porous body includes a first surface contacting with an atomized liquid and a second surface opposite to the first surface, the first surface is a liquid absorbing surface, the second surface is an atomizing surface, the heating element is disposed on the atomizing surface, the atomized liquid permeates from the liquid absorbing surface to the atomizing surface, and the heating element on the atomizing surface heats, the heat is conducted to the inside of the porous body to atomize the atomized liquid, and the atomizing core is supported and fixed in the closed body through the shell.

Preferably, the closing body comprises a closing support and a sealing element wrapped on the surface of the closing support, the closing support comprises an air passage connected with the insertion head of the flue pipe, an oil passage formed on the outer side of the air passage and isolated from the air passage, and an accommodating cavity located below the oil passage and used for fixedly accommodating the atomizing core, so that the sealing element is clamped between the insertion head of the flue pipe and the air passage, the sealing element is clamped between the inner wall surface of the smoke and bomb pipe and the sealing support, and the sealing element is clamped between the outer surface of the outer shell of the atomizing core and the inner wall surface of the accommodating cavity.

Preferably, the closing body is inserted into the cavity of the cartridge tube from the lower side and closes the liquid storage cavity, the oil passage of the closing body is communicated with the liquid storage cavity, the base is at least partially buckled into the cavity of the cartridge tube to fix the closing body, and the base comprises an insulating base, a connecting conductor which is arranged in the insulating base and upwards abutted against the contact part, an air inlet which is positioned below the atomizing core, and an atomizing cavity which is formed between the air inlet and the lower surface of the atomizing core.

According to the atomization core, the outer shell is arranged, the porous body slurry and the resistance material are filled in the outer shell, and then the porous body and the heating element are formed through one-step sintering, so that the sintering frequency is reduced, and the manufacturing cost is reduced; and the outer shell is wrapped on the outer peripheral surface of the porous body in a seamless manner, so that the outer peripheral surface of the porous body cannot seep liquid, and the risk of oil leakage is reduced. The support is provided by the outer shell, avoiding the problem of the ceramic body being brittle.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

FIG. 1 is a perspective view of an atomizing core of the present application;

FIG. 2 is a perspective view of an alternative angle of an atomizing core of the present application;

FIG. 3 is an exploded perspective view of an atomizing cartridge of the present application;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is another embodiment of a cross-sectional view of the atomizing core of FIG. 4;

FIG. 6 is a cross-sectional view of a cartridge of the present application;

FIG. 7 is an enlarged partial view of the dotted circle shown in FIG. 6;

FIG. 8 is an enlarged partial view of another embodiment of the dashed circle shown in FIG. 6;

fig. 9 is a cross-sectional view of another embodiment of an atomizing cartridge of the present application.

Description of the reference numerals

A cartridge tube-10; a tube body-11; a liquid storage cavity-12; flue pipe-13; a lumen-131; an insertion head-132; an enclosure-20; a closed support-21; an oil passage-211; an airway-212; a seal-22; a base-30; an insulating base-31; a connecting conductor-32; a gas inlet-33; an atomizing chamber-34; an atomizing core-40; a porous body-41; lower groove-411; an upper groove-412; liquid suction level-413; atomizing surface-414; a sidewall-415; an insulating and heat conducting layer-42; a heating element-43; an arcuate base-431; an open end-432; a reverse fold-433; a peripheral substrate-434; a contact portion-435; -a housing-45; a housing-451; a receiving cavity-452; convex hull-453.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings.

Example one

Referring to fig. 1 to 5, an atomizing core 40 of the present application includes a porous body 41, an insulating and heat conducting layer 42 coated on one side surface of the porous body 41, a heating element 43 adhered to the insulating and heat conducting layer 42, and a casing 45 wrapped around the porous body 41.

The porous body 41 is made of metal, metal powder and organic materials are mixed to form a mixture and then sintered, the organic materials are ablated and removed to form micropores, the pore diameter range of the micropores is between 15 and 22 microns, and the porosity range is between 50 and 60 percent.

In one embodiment, the pore diameter of the porous body 41 is between 18-20um, and the porosity is between 54% -55%.

In one embodiment, the pore diameter of the metal porous body 41 is in a range of 18-20um, and the porosity is in a range of 54.87% -55.05%.

The porous body 41 includes a liquid suction surface 413 that contacts the atomized liquid, and an atomization surface 414 that faces the liquid suction surface 413. An upper groove 412 is formed in the middle of the liquid absorbing surface 413, the bottom surface and the side surface of the upper groove 412 are used as a part of the liquid absorbing surface, a side wall 415 is formed on the periphery of the upper groove 412, the distance of penetration of atomized liquid can be reduced due to the arrangement of the upper groove 412, and the convex side wall 415 can provide good supporting strength or increase the storage capacity of tobacco tar.

The atomization surface 414 of the porous body 41 is concavely formed with a lower groove 411, the insulating and heat conducting layer 42 is arranged in the lower groove 411, and the lower surface of the insulating and heat conducting layer 42 and/or the outer periphery of the porous body 41 form the atomization surface 414. The lower surface of the insulating and heat conducting layer 42 is flush with the bottom surface of the edge of the porous body 41.

The insulating and heat conducting layer 42 may be a porous ceramic structure, which has the characteristics of insulation, heat conduction and atomized liquid adsorption. The pore diameter and porosity of the insulating and heat conducting layer 42 are set with reference to the porous body 41.

The insulating and heat conducting layer 42 may be made of other materials having insulating, heat conducting and atomized liquid adsorbing functions. The lower groove 411 protects the insulating and heat conducting layer 42, so that the thinner insulating and heat conducting layer 42 does not need to be stressed and cannot be cracked.

The heating element 43 is disposed on the outer surface of the insulating heat conducting layer 42, and the heating element 43 includes an arc-shaped base 431 surrounding the outer surface of the insulating heat conducting layer 42, a peripheral base 434 formed by bending the two free ends of the arc-shaped base 431 in opposite directions and extending along the periphery of the arc-shaped base 431, and a contact portion 435 formed at the free ends of the two peripheral bases 434. A reverse folding portion 433 is formed at a joint of the arc base 431 and the peripheral base 434, an open end 432 is formed between a pair of the reverse folding portions 433, the open end 432 is an opening direction of the arc base 431, and the open end 432 corresponds to a pair of the contact portions 435.

The housing 45 is a seamless tensile member, and includes a seamless case body 451 and a housing chamber 452 penetrating the case body 451. The housing 45 is preferably stretch-formed from a thin sheet of stainless steel and is attached to a tape structure. The tape may be attached at an end edge of the housing 451. The casing 45 may be made of other materials, and the casing 45 is required to have high temperature resistance so that the porous body 41 and the heating element 43 are not melted and deformed when sintered.

During manufacturing, automatic material pulling is performed through connection of the material belt of the housing 45, one side of the accommodating cavity 452 of the housing 45 is sealed through a jig, porous body slurry is filled into the accommodating cavity 452, then porous ceramic slurry is filled on the surface of the porous body slurry, a resistance material is printed on the surface of the porous body slurry, and finally the porous body 41, the insulating and heat conducting layer 42 and the heating element 43 which are made of the metal material are formed through sintering and molding. The full-automatic production is realized, and meanwhile, the slurry is sintered and formed at one time, so that the sintering and forming times are reduced, and the manufacturing cost is reduced.

The porous body slurry is formed by sintering the porous body 41 by mixing alloy powder with organic material, the lower side of the porous body 41 is sealed by a jig, the upper side of the porous body is pressed out of the lower groove 411 by the jig after being filled, the porous ceramic slurry is uniformly filled in the lower groove 411, and the heating element 43 can print resistance powder material on the surface of the ceramic slurry.

The ceramic slurry is a mixture of ceramic powder and organic material, and the organic material is ablated and removed during sintering to form the insulating heat-conducting layer 42.

In an embodiment, the porous body 41 may also be sintered and then installed in the housing 45, so as to facilitate fixing, and the housing 45 may be made into a tapered structure, or a structure with an inner folded edge formed by stamping the bottom edge.

Referring to fig. 5, in an embodiment, the upper groove 412 of the porous body 41 may be omitted, a side surface of the porous body 41 facing the atomized liquid is a plane or irregular surface structure, the height of the housing 45 is greater than the height of the porous body 41, and the upper portion is fixedly supported by the upper edge of the housing 54, so as to reduce the thickness of the porous body 41, thereby reducing the distance of the atomized liquid and improving the atomization effect.

This application atomizing core 40 adopts the porous body 41 of metal material to form as supporting the atress main part, sets up insulating heat-conducting layer 42 on porous body 41 surface heating element 43, through heating element 43 generates heat and passes through the heat insulating heat-conducting layer 42 conducts extremely produce fog with the atomizing liquid in the porous body 41, solved traditional fragile porous ceramic as supporting the cracked technical problem of atress main part easily, the metal material is as atomizing liquid infiltration main part simultaneously, and atomizing liquid conduction infiltration in-process is more pure, and difficult quilt pollutes, has solved the problem of producing soil smell behind the traditional porous ceramic sepage easily.

Meanwhile, the atomization core 40 of the present application is formed by stamping a shell 45 first, then filling the porous body slurry, the insulating and heat conducting layer slurry and the resistance material in the shell 45 in sequence, and then sintering and forming the porous body 41, the insulating and heat conducting layer 42 and the heating element 43 at one time, so that the sintering frequency is reduced, and the manufacturing cost is reduced; and the outer shell 45 is wrapped on the outer peripheral surface of the porous body 41 without a gap, so that the outer peripheral surface of the porous body 41 cannot seep liquid, and the risk of oil leakage is reduced.

Referring to fig. 6 and 7, the atomizing core 40 of the present application is used in the implementation of the cartridge, and the cartridge of the present application includes a cartridge tube 10 having a flue tube 13 and a liquid storage cavity 12, an enclosure 20 installed in the cartridge tube 10 and enclosing the liquid storage cavity 12, an atomizing core 40 installed in the enclosure, and a base 30 fixed to the cartridge tube 10.

The cigarette bullet pipe 10 comprises a pipe body 11, a liquid storage cavity 12 located in the pipe body 11, and a flue pipe 13 which is arranged on the pipe body 11 and is vertically communicated. The flue pipe 13 extends into the liquid storage cavity 12 from the top of the pipe body 11, and the flue pipe 13 comprises a flue hole 131 which is through from top to bottom and an insertion head 132 formed at the bottom of the flue pipe 13. The insertion head 132 has an outer diameter smaller than the outer diameter of the flue tube 13. Preferably, the flue pipe 13 is located in the middle of the reservoir chamber 12; in one embodiment, the flue 13 may be disposed on one or both sides of the reservoir 12.

The closing body 20 comprises a closing support 21 and a sealing member 22 wrapped on the surface of the closing support 21. The closed bracket 21 includes an air passage 212 engaged with the insertion head 132 of the flue pipe 13, an oil passage 211 formed outside the air passage 212 and isolated from the air passage 212, and an accommodating chamber 213 located below the oil passage 211 for fixedly accommodating the atomizing core 40. The sealing member 22 covers at least the surfaces of the oil passage 211, the air passage 212, and the accommodating chamber 213, and at least partially the outer surface of the closed support 21, so that the sealing member 22 is clamped between the insertion head 132 of the flue pipe 13 of the aerosol pipe 10 and the air passage 212 to achieve sealing, the sealing member 22 is clamped between the inner wall surface of the aerosol pipe 10 and the sealed support 21 to achieve sealing, and the sealing member 22 is clamped between the outer surface of the outer shell 45 of the atomizing core 40 and the inner wall surface of the accommodating chamber 213 to achieve sealing.

The closing body 20 is inserted into the cavity of the cigarette bullet tube 10 from the lower side and closes the liquid storage cavity 12, the oil passage of the closing body 20 is communicated with the liquid storage cavity 12, and the base 30 is at least partially buckled into the cavity of the cigarette bullet tube 10 to fix the closing body 20. The base 30 includes an insulating base 31, a connecting conductor 32 disposed in the insulating base 31 and upwardly abutted to the contact portion 435, an air inlet 33 located below the atomizing core 40, and an atomizing chamber 34 formed between the air inlet 33 and the lower surface of the atomizing core 40.

The atomized liquid of this application cigarette bullet flows in from stock solution chamber 12 on the imbibition face 413 of atomizing core 40, the atomized liquid infiltration extremely atomizing core 40 atomizing face 414, heating element 43 power supply heating, through insulating heat-conducting layer 42 conduction extremely in the porous body 41 and with the atomized liquid atomizing in it produce the fog, the fog passes through atomizing chamber 34 conduction extremely in the air flue 213 back in the same direction as the flue pipe 13 is sucked out.

The outer surface of the housing 45 is sealed by sandwiching the sealing member at least partially with the inner wall surface of the housing chamber 213, and a serious oil leakage problem due to deformation of the porous body 41 is not caused. The supporting strength of the shell 45 is sufficient, and a plurality of material belts are connected, so that the shell can be assembled in an automatic assembly mode during assembly.

Example two

Referring to fig. 9, compared to the first embodiment, the second embodiment is different in that the porous body 41 is made of a porous ceramic material instead of a metal material, the insulating and heat conducting layer 42 is omitted, and the heating element 43 is directly disposed on the bottom surface of the porous body 41 and is formed by sintering.

The present embodiment can effectively solve the brittleness problem of the porous body 41 made of a ceramic material, and the rigid housing 45 serves as a supporting force-bearing element, so that the housing 45 can effectively protect the porous body 41 from product scrapping caused by force-bearing fracture, or from deformation caused by force-bearing, resulting in deformation and partial breakage of the product, thereby causing a serious oil leakage phenomenon.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides an atomizing core, its characterized in that, including the shell of acceping the chamber that link up from top to bottom, wrap up in the porous body of acceping the intracavity of shell and locating the heating element of porous body bottom surface, the porous body include with the first surface of atomized liquid contact and with the second surface that the first surface is relative, the first surface is for inhaling the liquid level, the second surface is the atomising surface, heating element locates on the atomising surface, atomized liquid follows inhale the liquid level and permeate to the atomising surface, the heating element heating on the atomising surface, the heat conduction extremely will in the porous body atomized liquid atomizes.

2. The atomizing core of claim 1, wherein the housing is a rigid material, and the atomizing core is held in holding support by the housing for securement within the atomizing device.

3. The atomizing core according to claim 2, wherein the housing is formed by stretching a stainless steel plate, and includes a seamless housing and the receiving cavity, a material belt is connected to a bottom side edge of the housing, and the porous body slurry and the heating element material are sintered and molded after being filled in the receiving cavity.

4. The atomizing core of claim 3, wherein the housing height of the outer housing is greater than the height of the porous body, resulting in a reduced thickness of the porous body.

5. The atomizing core of claim 1, wherein the atomizing core further comprises an insulating and heat conducting layer disposed on the second surface of the porous body, the heating element is disposed on the insulating and heat conducting layer, the second surface of the porous body is provided with a lower groove, the insulating and heat conducting layer is coated in the lower groove, the insulating and heat conducting layer is made of porous ceramic, the porous body is made of porous metal, the porous body is formed by mixing metal powder and organic material and sintering, the organic material in the metal powder is ablated to form a microporous structure, and the porous ceramic is formed by mixing ceramic powder and organic material and sintering to remove the organic material.

6. The atomizing core of claim 5, wherein the first surface of the porous body is concavely formed with an upper groove, the upper groove being peripherally formed with a boundary wall.

7. The atomizing core of claim 6, wherein the pores within the porous body have a pore size ranging from 15 to 22um and a porosity ranging from 50% to 60%.

8. The atomizing core of claim 7, wherein the pores within the porous body have a pore size ranging from 18 to 20um and a porosity ranging from 54% to 55%.

9. The atomizing core of claim 8, wherein the insulating and heat conducting layer is made of porous ceramic, and a microporous structure is formed inside the insulating and heat conducting layer.

10. The atomizing core of claim 1, wherein the porous body is a porous ceramic material formed by mixing ceramic powder with an organic material and then sintering to remove the organic material.

11. A cigarette bullet comprises a cigarette bullet tube provided with a smoke channel tube and a liquid storage cavity, a closing body which is arranged in the cigarette bullet tube and closes the liquid storage cavity, an atomizing core which is arranged in the closing body and a base which is fixedly held with the cigarette bullet tube to limit the closing body, and is characterized in that the atomizing core comprises a shell provided with an accommodating cavity which is communicated up and down, a porous body which is wrapped in the accommodating cavity of the shell and a heating element which is arranged on the bottom surface of the porous body, the porous body is made of porous metal materials, the porous body comprises a first surface which is contacted with atomized liquid and a second surface which is opposite to the first surface, the first surface is a liquid absorbing surface, the second surface is an atomizing surface, the heating element is arranged on the atomizing surface, the atomized liquid permeates from the liquid absorbing surface to the atomizing surface, the heating element on the atomizing surface heats and conducts heat into the porous body to atomize the atomized liquid, the atomizing core is supported and fixed in the closed body through the shell.

12. The cartridge of claim 11, wherein the closing body includes a closing bracket and a sealing member wrapped around a surface of the closing bracket, the closing bracket includes an air passage engaged with the insertion head of the flue tube, an oil passage formed outside the air passage and isolated from the air passage, and a receiving chamber located below the oil passage for fixedly receiving the atomizing core, so that the sealing member is sandwiched between the insertion head of the flue tube and the air passage, the sealing member is sandwiched between an inner wall surface of the cartridge tube and the sealing bracket, and the sealing member is sandwiched between an outer surface of a casing of the atomizing core and an inner wall surface of the receiving chamber.

13. The cartridge of claim 12, wherein the closing body is inserted into the cavity of the cartridge tube from the lower side and closes the reservoir, the oil passage of the closing body communicates with the reservoir, the base at least partially snaps into the cavity of the cartridge tube to secure the closing body, and the base includes an insulating base, a connecting conductor disposed in the insulating base and abutting upward against the contact portion, an air inlet located below the atomizing core, and an atomizing cavity formed between the air inlet and the lower surface of the atomizing core.