阅读说明：本技术 装配辅助工具及雾化芯装配方法 (Assembly auxiliary tool and atomization core assembly method ) 是由 王伟 于 2021-08-24 设计创作，主要内容包括：本发明涉及一种装配辅助工具及雾化芯装配方法。该装配辅助工具包括装配管,装配管具有一作为其轴向一端的第一开口端,装配管的周向侧壁开设有装棉口,装棉口贯通至第一开口端的开口。上述装配辅助工具,首先,将多孔介质层包裹在发热体上,再将发热体和多孔介质层一同插入装配管的第一开口端,使得多孔介质层的端部由装棉口穿出至装配管外,从而剪除多余的多孔介质层。再然后,将装配管的第一开口端插入外罩内,再将装配管拔出,并使得多孔介质层和发热体保留在外罩内,即完成了多孔介质层和发热体与外罩的装配。如此,利用装配辅助工具的装配管将发热体和多孔介质层装配至外罩内,操作简单快捷,降低了装配难度,提高了良品率和生产效率。(The invention relates to an assembly auxiliary tool and an atomization core assembly method. The assembling auxiliary tool comprises an assembling pipe, wherein the assembling pipe is provided with a first opening end serving as one end in the axial direction, and a cotton loading port is formed in the circumferential side wall of the assembling pipe and penetrates through the opening of the first opening end. According to the assembly auxiliary tool, firstly, the porous medium layer is wrapped on the heating body, and then the heating body and the porous medium layer are inserted into the first opening end of the assembly pipe together, so that the end part of the porous medium layer penetrates out of the assembly pipe through the cotton loading port, and therefore redundant porous medium layers are cut. Then, the first opening end of the assembly pipe is inserted into the outer cover, the assembly pipe is pulled out, and the porous medium layer and the heating element are kept in the outer cover, namely the assembly of the porous medium layer, the heating element and the outer cover is completed. So, utilize assembly appurtenance's assembly pipe to assemble heat-generating body and porous medium layer to the dustcoat in, easy operation is swift, has reduced the assembly degree of difficulty, has improved yields and production efficiency.)

1. An assembly assisting tool, characterized in that the assembly assisting tool comprises an assembly pipe (20), the assembly pipe (20) has a first opening end (21) as one end in an axial direction thereof, a cotton loading port (22) is opened in a circumferential side wall of the assembly pipe (20), and the cotton loading port (22) penetrates to an opening (211) of the first opening end (21).

2. The assembly aid of claim 1, wherein the cotton loading opening (22) comprises one or two;

when the number of the cotton loading openings (22) is two, the two cotton loading openings (22) are respectively positioned on two sides of the assembly pipe (20) in a first direction perpendicular to the axial direction of the assembly pipe (20).

3. The assembly aid of claim 1, wherein the fitting tube (20) has a first side (221), a second side (222), and a third side (223) that each pass through an inner wall and an outer wall of the fitting tube (20);

one end of the first side (221) and one end of the second side (222) both extend lengthwise in the axial direction of the fitting tube (20) to the opening (211) of the first open end (21);

one end of the third edge (223) is connected with one end of the first edge (221) far away from the first opening end (21), the other opposite end of the third edge (223) is connected with one end of the second edge (222) far away from the first opening end (21), and the first edge (221), the second edge (222) and the third edge (223) are enclosed to form the cotton containing opening (22).

4. The assembly aid of claim 3, wherein the first edge (221) comprises a first segment (2211) and a second segment (2213) arranged in sequence from the first open end (21) to the third edge (223); the second side (222) comprises a third section (2221) and a fourth section (2223) which are sequentially arranged from the first open end (21) to the third side (223);

the distance between the first segment (2211) and the third segment (2221) is gradually increased in a direction from the first open end (21) toward the opposite end of the fitting tube (20), and the distance between the second segment (2213) and the fourth segment (2223) is constant.

5. The fitting assistance tool according to claim 1, characterized in that the fitting tube (20) further has a second open end (24) as the other end in the axial direction thereof;

the assembly aid further comprises a pressing member that is penetrable into the first open end (21) of the assembly pipe (20) from the opening of the second open end (24).

6. The assembly assist tool according to claim 1, further comprising a slider (30) and a pressing member, wherein the slider (30) is movably connected to the assembly pipe (20) in an axial direction of the assembly pipe (20), the assembly pipe (20) is provided with a slide groove extending lengthwise in the axial direction, the slider (30) has a mounting portion that penetrates into the assembly pipe (20) through the slide groove, and the pressing member is located in the assembly pipe (20) and is connected to the mounting portion.

7. The assembly aid of claim 1, wherein the first open end (21) of the assembly tube (20) has an inner diameter dimension that is less than or equal to an outer diameter dimension of the porous media layer (12).

8. An atomizing core assembling method using the assembling auxiliary tool according to any one of claims 1 to 7, characterized by comprising the steps of:

a. wrapping the heating element (11) by using a porous medium layer (12) to form a first combination body (112);

b. inserting the first assembly (112) into the fitting pipe (20) through the opening (211) of the first open end (21), and allowing the end of the porous medium layer (12) to pass out of the fitting pipe (20) through the cotton-filling opening (22);

c. removing the part of the porous medium layer (12) which penetrates out of the assembly pipe (20) from the cotton loading port (22);

d. inserting a first open end (21) of the fitting tube (20) into the housing (13);

e. the fitting pipe (20) is pulled out from the housing (13) so that the first assembly (112) is fitted into the housing (13).

9. The atomizing core assembly method of claim 8, wherein step a is preceded by the further steps of: inserting a shaping body (40) into a central hole of the heating body (11);

the method also comprises the following steps between the step b and the step d: and (3) pulling out the shaping body (40) from the central hole of the heating body (11).

10. The atomizing core assembly method of claim 8, wherein step e specifically includes:

the first assembly (112) is abutted by a pressing part arranged in the assembling pipe (20);

the fitting tube (20) is pulled out from the housing (13).

Technical Field

The invention relates to the technical field of atomization devices, in particular to an assembly auxiliary tool and an atomization core assembly method.

Background

Because the smoke generated by the combustion of tobacco contains a plurality of substances which are harmful to health, such as nicotine, coke liquid and the like, the smoking becomes the biggest reason for preventing death in the world at present, and the body of a smoker is damaged by inhaling second-hand smoke by people around the smoker. Consequently along with the development of science and technology and people's increasingly attach importance to health, electronic atomization device's use is more and more extensive, and most electronic atomization device produces smog through atomizing the oil mist, compares in the direct combustion of pipe tobacco, has effectively reduced harmful substance's production, has weakened the injury to smoker and crowd around to a certain extent.

The atomizing core is used as the core structure of the electronic atomizing device and is used for heating the atomized oil, so that the atomized oil is atomized to generate smoke for a user to suck. Generally, the atomizing core needs to be assembled in the outer cover together with the heating element and the oil absorption cotton. However, the existing assembly process is complex, the operation difficulty is high, the yield is low, and the efficiency is low.

Disclosure of Invention

Therefore, it is necessary to provide an assembly auxiliary tool and an assembly method of an atomizing core for overcoming the above defects, aiming at the problems of complicated assembly process, high operation difficulty, low efficiency and unstable assembly quality of the atomizing core in the prior art.

An assembly assist tool includes an assembly pipe having a first open end as one end in an axial direction thereof, a cotton loading port opened in a circumferential side wall of the assembly pipe, the cotton loading port penetrating to an opening of the first open end.

In one embodiment, the cotton loading openings comprise one or two;

when the cotton loading openings comprise two cotton loading openings, the two cotton loading openings are respectively positioned at two sides of the assembling pipe in a first direction perpendicular to the axial direction of the assembling pipe.

In one embodiment, the fitting tube has a first side, a second side, and a third side, each of which passes through an inner wall and an outer wall of the fitting tube;

one end of the first side and one end of the second side both extend lengthwise in the axial direction of the assembly pipe to an opening of the first open end;

one end of the third edge is connected with one end, far away from the first opening end, of the first edge, the other end, opposite to the third edge, of the second edge is connected with one end, far away from the first opening end, of the second edge, and the first edge, the second edge and the third edge are enclosed to form the cotton containing opening. Therefore, when the porous medium layer and the heating body are inserted into the assembly pipe together from the opening of the first opening end, the end part of the porous medium layer is aligned with the cotton containing port, so that the end part of the porous medium layer is inserted into the cotton containing port, and the redundant part of the porous medium layer is cut off conveniently.

In one embodiment, the first edge comprises a first section and a second section which are arranged in sequence from the first open end to the third edge; the second edge comprises a third section and a fourth section which are sequentially arranged from the first opening end to the third edge;

in a direction from the first open end toward the opposite end of the fitting pipe, a distance between the first section and the third section gradually increases, and a distance between the second section and the fourth section does not change. Therefore, the distance between the first section and the third section is gradually increased, so that the inlet of the cotton loading port is trumpet-shaped, and the end part of the porous medium layer can be accurately inserted into the cotton loading port.

In one of the embodiments, the fitting tube further has a second open end as the other axial end thereof;

the fitting assist tool further includes a pressing member that is penetrable into the first open end of the fitting tube from the opening of the second open end. Therefore, in the process of pulling the assembling pipe out of the outer cover, the porous medium layer and the heating element can be pressed in the outer cover through the pressing piece, and the porous medium layer and the heating element are prevented from being pulled out of the outer cover along with the assembling pipe.

In one embodiment, the assembly assisting tool further includes a sliding member movably connected to the assembly pipe in an axial direction of the assembly pipe, the assembly pipe is provided with a sliding groove extending lengthwise in the axial direction, the sliding member has a mounting portion penetrating into the assembly pipe from the sliding groove, and a pressing member is located in the assembly pipe and connected to the mounting portion. Therefore, when the assembly pipe needs to be pulled out, the sliding piece is pushed to move along the assembly pipe until the pressing piece is driven to abut against the porous medium layer. And then, the assembling pipe is pulled out of the outer cover, and the pressing piece is always kept in abutting connection with the porous medium layer in the process of pulling out the assembling pipe, so that the porous medium layer is prevented from being pulled out of the outer cover along with the assembling pipe.

In one embodiment, the inner diameter dimension of the first open end of the fitting tube is less than or equal to the outer diameter dimension of the porous media layer.

An atomizing core assembly method comprising the steps of:

a. wrapping the heating element by using the porous medium layer to form a first assembly;

b. inserting the first assembly into the assembly pipe from the opening of the first opening end, and enabling the end part of the porous medium layer to penetrate out of the assembly pipe from the cotton containing port;

c. removing the part of the porous medium layer which penetrates out of the assembly pipe from the cotton loading port;

d. inserting a first open end of the mounting tube into the housing;

e. the fitting pipe is pulled out from the housing so that the first assembly is fitted into the housing.

In one embodiment, step a further comprises the following steps: inserting the shaping body into the central hole of the heating body;

the method also comprises the following steps between the step b and the step d: and pulling out the shaping body from the central hole of the heating body.

In one embodiment, step e specifically includes:

a pressing piece penetrating through the assembly pipe is used for pressing against the first assembly;

and pulling out the fitting pipe from the housing.

According to the assembly auxiliary tool and the atomization core assembly method, when the porous medium layer is arranged in the outer cover, the porous medium layer is wrapped on the heating element, and then the combination body of the heating element and the porous medium layer is inserted into the first opening end of the assembly pipe together, so that the end part of the porous medium layer penetrates out of the assembly pipe through the cotton loading opening, and therefore the redundant porous medium layer is convenient to cut. Then, the first opening end of the assembly pipe is inserted into the outer cover, the assembly pipe is pulled out, and the porous medium layer and the heating element are kept in the outer cover, namely the assembly of the porous medium layer, the heating element and the outer cover is completed.

So, utilize assembly appurtenance's assembly pipe to assemble heat-generating body and porous medium layer to the dustcoat in, easy operation is swift, greatly reduced the assembly degree of difficulty to yields and production efficiency have been improved.

Drawings

FIG. 1 is a cross-sectional view of an atomizing core in one embodiment of the present invention;

FIG. 2 is a schematic view of an assembly aid according to an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly aid according to another embodiment of the present invention;

FIG. 4 is a schematic view of an assembly aid according to another embodiment of the present invention;

FIG. 5 is a flow chart of a method of assembling an atomizing cartridge in accordance with one embodiment of the present invention;

fig. 6 is an evolution of the flow of the atomizing core assembly method shown in fig. 5.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, before explaining the assembly assisting tool, the structure of the atomizing core 10 will be explained: the atomizing core 10 comprises an outer cover 13, a porous medium layer 12 and a heating element 11, wherein the porous medium layer 12 and the heating element 11 are both arranged in the outer cover 13, and the porous medium layer 12 is positioned between the heating element 11 and the inner wall of the outer cover 13. Alternatively, the heating body 11 may be a resistance wire, and the porous medium layer 12 may be an oil-guiding surface. In the process of assembling the atomizing core 10, the porous medium layer 12 needs to be installed in the outer cover 13, and the phenomenon that the deformation of the installed porous medium layer 12 is uneven to influence the oil guiding effect easily occurs, so that the assembly difficulty is high, the yield is low, and the production efficiency is low.

Therefore, it is necessary to provide an assembly auxiliary tool and an atomizing core assembly method which simplify the assembly process, reduce the assembly difficulty, and improve the yield and production efficiency.

Referring to fig. 2, an assembly assisting tool according to an embodiment of the present invention includes an assembly tube 20, wherein the assembly tube 20 has a first open end 21 as one axial end thereof. The fitting pipe 20 has a fitting opening 22 opened in a circumferential side wall thereof, and the fitting opening 22 penetrates to an opening 211 of the first opening end 21. Alternatively, the fitting tube 20 may be a thin-walled metal tube. Of course, in other embodiments, the fitting tube 20 may be made of other materials, and is not limited herein.

When the porous medium layer 12 is installed in the outer cover 13, the porous medium layer 12 is firstly wrapped on the heating element 11, and then the combination of the heating element 11 and the porous medium layer 12 is inserted into the first opening end 21 of the assembly pipe 20 together, so that the end part of the porous medium layer 12 penetrates out of the assembly pipe 20 through the cotton loading port 22, and the redundant porous medium layer 12 is conveniently cut. Then, the first open end 21 of the assembly tube 20 is inserted into the outer cover 13, and the assembly tube 20 is pulled out, so that the porous medium layer 12 and the heating element 11 are retained in the outer cover 13, that is, the assembly of the porous medium layer 12 and the heating element 11 with the outer cover 13 is completed.

Therefore, the heating body 11 and the porous medium layer 12 are assembled in the outer cover 13 through the assembling pipe 20 of the auxiliary assembling tool, the operation is simple and fast, the assembling difficulty is greatly reduced, and the yield and the production efficiency are improved.

In specific embodiments, the inner diameter of the first open end 21 of the fitting tube 20 is smaller than the outer diameter of the porous medium layer 12, so that the porous medium layer 12 shrinks to a certain extent when being inserted into the fitting tube 20 from the opening of the first open end 21, and the porous medium layer 12 inserted into the fitting tube 20 is fixed relative to the fitting tube 20. When the mounting tube 20 is inserted into the cover 13 and the mounting tube 20 is pulled out, the porous medium layer 12 can be elastically returned to be in close contact with the inner wall of the cover 13. It is understood that in the present embodiment, the porous medium layer 12 may be made of oil absorbent cotton.

Of course, in other embodiments, the inner diameter of the first opening end 21 of the fitting tube 20 may be substantially equal to the outer diameter of the porous medium layer 12, and the porous medium layer 12 is not elastically deformed when being installed in the fitting tube 20 and the outer cover 13, but is foamed and expanded after being installed in the outer cover 13 and absorbing oil, so as to be closely attached to the inner wall of the outer cover 13. It is understood that, in the present embodiment, the porous medium layer 12 may be made of a foaming material, which can expand after absorbing oil.

In the embodiment of the present invention, the fitting tube 20 has a first side 221, a second side 222, and a third side 223 that all penetrate the inner wall and the outer wall of the fitting tube 20. One end of the first side 221 and one end of the second side 222 both extend lengthwise along the axial direction of the assembling tube 20 to the opening 211 of the first opening end 21, one end of the third side 223 is connected to one end of the first side 221 away from the first opening end 21, and the other end of the third side 223 is connected to one end of the second side 222 away from the first opening end 21, so that the first side 221, the second side 222 and the third side 223 jointly enclose the cotton loading opening 22. In this way, when the porous medium layer 12 and the heating element 11 are inserted into the fitting tube 20 together from the opening 211 of the first open end 21, the end of the porous medium layer 12 is aligned with the cotton loading port 22 so that the end of the porous medium layer 12 is inserted into the cotton loading port 22, so that the excess portion of the porous medium layer 12 is cut off.

In particular, in the embodiment, the first side 221 includes a first segment 2211 and a second segment 2213 sequentially arranged from the opening 211 of the first open end 21 to the third side 223. The second side 222 includes a third section 2221 and a fourth section 2223 arranged in order in the direction from the opening 211 of the first open end 21 to the third side 223.

In a direction from the first open end 21 toward the opposite end of the fitting tube 20, the distance between the first segment 2211 and the third segment 2221 gradually increases, and the distance between the second segment 2213 and the fourth segment 2223 does not change. Thus, as the distance between the first section 2211 and the third section 2221 is gradually increased, the inlet of the cotton loading port 22 is flared, so that the end of the porous medium layer 12 can be accurately inserted into the cotton loading port 22.

In the embodiment of the present invention, cotton loading port 22 includes one or two. Referring to fig. 2, when only one cotton loading opening 22 is provided, a porous medium layer 12 is formed by wrapping the heating element 11 with a piece of porous medium sheet for one circle, and redundant parts at two ends of the porous medium layer 12 are closed. After the porous medium layer 12 and the heating element 11 are inserted into the assembling pipe 20, the redundant parts at the two ends of the porous medium layer 12 are arranged at the cotton containing opening 22 for cutting.

Referring to fig. 3, when the two cotton loading ports 22 are provided, the two cotton loading ports 22 are respectively provided on both sides of the assembling tube 20 in a first direction perpendicular to the axial direction of the assembling tube 20. Thus, the heating element 11 can be sandwiched by two porous medium sheets to form the porous medium layer 12 covering the heating element 11. After the porous medium layer 12 and the heating element 11 are inserted into the assembling pipe 20, the redundant parts at the two ends of the porous medium layer 12 are respectively arranged through the two cotton containing openings 22 so as to be cut off conveniently.

In the embodiment of the present invention, the fitting tube 20 further has the second open end 24 as the other end in the axial direction thereof, that is, the first open end 21 and the second open end 24 are respectively provided as both ends in the axial direction of the fitting tube 20. The assembly aid further comprises a press member (not shown) which is insertable into the first open end 21 of the assembly tube 20 from the opening of the second open end 24. In this way, in the process of pulling out the fitting tube 20 from the outer cover 13, the porous medium layer 12 and the heating element 11 can be pressed against the outer cover 13 by the pressing member, and the porous medium layer 12 and the heating element 11 can be prevented from coming out of the outer cover 13 together with the fitting tube 20. Alternatively, the pressing member may be a needle, a rod, a bar, or the like, which is not limited herein.

It should be noted that the pressing member is not limited to be separated from the fitting tube 20, and in other embodiments, the pressing member may be fitted to the fitting tube 20. Referring to fig. 4, in particular, the assembly assisting tool further includes a sliding member 30 and a pressing member. The slider 30 is movably connected to the fitting tube 20 in the axial direction of the fitting tube 20. The fitting tube 20 is provided with a slide groove (not shown) extending lengthwise in the axial direction thereof, and the slider 30 has a mounting portion (not shown) inserted into the fitting tube 20 through the slide groove. The pressing member is located inside the fitting tube 20 and connected to the mounting portion so that the pressing member can move together with the slider 30 relative to the fitting tube 20. Thus, when the assembling tube 20 needs to be pulled out, the sliding member 30 is pushed to move along the assembling tube 20 until the pressing member is driven to abut against the porous medium layer 12. Then, the fitting tube 20 is pulled out from the outer cover 13, and the pressing member is always kept in contact with the porous medium layer 12 in the process of pulling out the fitting tube 20, so that the porous medium layer 12 is prevented from being pulled out from the outer cover 13 together with the fitting tube 20.

Further, the sliding member 30 is sleeved outside the assembling pipe 20, and the mounting portion extends into the assembling pipe 20 through the sliding groove and is connected with the pressing member.

Referring to fig. 2, 5 and 6, based on the above-mentioned auxiliary assembly tool, the present invention further provides an assembly method of an atomizing core, which includes the steps of:

s10, wrapping the heating element 11 by using the porous medium layer 12 to form a first combination body 112;

s20, inserting the first combination body 112 into the assembly pipe 20 from the opening 211 of the first opening end 21, and leading the end part of the porous medium layer 12 out of the assembly pipe 20 from the cotton loading opening 22;

s30, removing the part of the porous medium layer 12 which penetrates out of the assembly pipe 20 from the cotton containing port 22;

s40, penetrating the first open end 21 of the assembling pipe 20 into the outer cover 13;

s50, the mounting pipe 20 is pulled out from the housing 13, so that the first assembly 112 is mounted in the housing 13.

Therefore, the heating body 11 and the porous medium layer 12 are assembled in the outer cover 13 through the assembling pipe 20 of the auxiliary assembling tool, the operation is simple and fast, the assembling difficulty is greatly reduced, and the yield and the production efficiency are improved.

In an embodiment, before step S10, the method further includes the steps of:

s11, inserting the shaping body 40 into the center hole of the heating body 11 for shaping the heating body 11, thereby avoiding the deformation of the heating body 11 in the assembly process, further reducing the assembly difficulty and improving the yield.

Further comprising the steps between steps S20 and S40:

s21, the shaping body 40 is pulled out from the center hole of the heating element 11. After the first assembly 112 is inserted into the assembly tube 20, the assembly tube 20 has a fixing function for the first assembly 112, and in order to insert the first open end 21 of the assembly tube 20 into the outer cover 13 in the subsequent step, the fixing member 40 needs to be pulled out from the center hole of the heating element 11.

The execution order of step S21 and step S30 is not limited. That is, step S21 may be performed first, and then step S30 may be performed; step S30 may be executed first, and then step S21 may be executed.

In an embodiment, step S50 specifically includes:

the pressing member inserted into the assembly pipe 20 is pressed against the first assembly 112;

the mounting tube 20 is pulled out of the housing 13.

In this manner, the first combined body 112 (i.e., the porous medium layer 12 and the heating element 11) is pressed by the pressing member, so that the first combined body 112 does not come out of the cover 13 following the fitting tube 20 when the fitting tube 20 is pulled out.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several 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.