CN218219179U - Atomization assembly, atomizer and electronic atomization device - Google Patents
Atomization assembly, atomizer and electronic atomization device Download PDFInfo
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- CN218219179U CN218219179U CN202222155811.1U CN202222155811U CN218219179U CN 218219179 U CN218219179 U CN 218219179U CN 202222155811 U CN202222155811 U CN 202222155811U CN 218219179 U CN218219179 U CN 218219179U
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Abstract
The utility model provides an atomization component, atomizer and electronic atomization device, atomization component includes: the center of the bracket is provided with a through atomizing channel and the side edge of the bracket is also provided with at least one liquid inlet channel communicated with the atomizing channel and the outside of the bracket; the magnetic induction heating pipe is made of porous metal and is arranged in the atomizing channel and used for sucking the liquid matrix entering the atomizing channel from the liquid inlet channel; the electromagnetic coil is made of porous metal and is arranged in the bracket and used for heating the magnetic induction heating pipe so as to atomize the liquid matrix led into the magnetic induction heating pipe after heating; and the electromagnetic shielding tube is made of porous metal and is positioned in the bracket and arranged around the periphery of the electromagnetic coil. The utility model discloses a magnetic induction heating pipe that porous metal made is favorable to concentrating the heat, improves the efficiency of generating heat and generates heat fast, and the electromagnetic shield pipe of setting can prevent magnetism and outwards propagate, reduces electromagnetic radiation, still can play the effect of amortization simultaneously.
Description
Technical Field
The utility model relates to an electron cigarette field, concretely relates to atomization component, atomizer and electron atomizing device.
Background
Along with the publicity of harmfulness of paper cigarettes, more and more users with smoking addiction gradually change, and the electronic cigarette is mainly used for replacing the traditional cigarette, and the main realization principle is that the cigarette oil without toxic and side effects is atomized into smoke through the atomizer, and the smoker obtains a stimulation sense of cigarette effect through the atomized smoke.
In the existing electronic cigarette atomizer, a heating component of an atomizing core generates heat and atomizes cigarette liquid to form smoke; heating element has a variety, generally includes ceramic base member, heater and connecting terminal, and the heater winding is on ceramic base member, and this connecting terminal sets up the both ends at ceramic base member respectively to all be connected with the heater electricity, this ceramic base member is provided with the cavity micropore, and this connecting terminal includes the terminal through-hole with cavity micropore matched with.
However, the above-mentioned heat generating component has several disadvantages:
1. the resistance heating mode has low efficiency, electricity consumption and slow smoke discharging speed;
2. the structure is complex, the cost is high, and the automatic production is not easy to realize;
3. the electric connection with the heating element needs a lead and the surface area of the heating element is large, so that the heating speed is low;
4. the heating wire is easy to break, and the service life is short;
5. the resistance wire is easy to move on the surface of the liquid guide body, so that the screw pitch is uneven, the heating is uneven and the taste is poor.
Meanwhile, some heating components are metal sheets, eddy current heating is generated through electromagnetic induction, a guide piece is arranged on the surface of the metal sheets, smoke liquid is led to the surface of the metal sheets through the guide piece and is heated to form smoke; however, the above-mentioned heat generating component has several disadvantages:
1. low heating efficiency and insufficient smoke generation;
2. the smoke liquid is easy to explode at the moment of contacting the smoke liquid with the metal sheet, so that the electronic cigarette is damaged and noise is generated;
3. there are problems of heat generation and electromagnetic radiation of the electromagnetic coil.
SUMMERY OF THE UTILITY MODEL
The utility model provides an atomization component, atomizer and electronic atomization device to above-mentioned current technical defect, solved and generate heat inefficiency, noise big and have electromagnetic radiation's problem in current.
In a first aspect, to solve the above technical problem, an atomizing assembly is provided, which includes:
the center of the bracket is provided with a through atomizing channel and the side edge of the bracket is also provided with at least one liquid inlet channel communicated with the atomizing channel and the outside of the bracket;
the magnetic induction heating pipe is made of porous metal and is arranged in the atomizing channel and used for sucking the liquid matrix entering the atomizing channel from the liquid inlet channel;
the electromagnetic coil is made of porous metal and is arranged in the bracket and used for heating the magnetic induction heating pipe so as to atomize the liquid matrix led into the magnetic induction heating pipe after heating;
and the electromagnetic shielding tube is made of porous metal and is positioned in the bracket and arranged around the periphery of the electromagnetic coil.
Further, the porous metal is metal felt or foam metal.
Furthermore, the atomization channel comprises an air outlet channel and an atomization cavity which are communicated up and down, and the magnetic induction heating pipe is arranged in the atomization cavity; still be equipped with one in the support and encircle the annular chamber that the atomizing chamber set up, the annular intracavity is all located to solenoid and electromagnetic shield pipe, inlet channel communicates annular chamber and atomizing chamber in proper order, just the electromagnetic shield pipe runs through in the position department that corresponds inlet channel and is equipped with the via hole, solenoid is for having gapped spiral coil to make liquid matrix get into in the atomizing chamber after the clearance.
Furthermore, the lower end of the annular cavity is an opening, and the inner circumferential surface and the outer circumferential surface of the electromagnetic coil are respectively abutted with the inner circumferential surface of the annular cavity and the inner circumferential surface of the electromagnetic shielding tube so as to close the opening.
Furthermore, the atomization assembly also comprises a non-metal oil guide body which is sleeved on the periphery of the magnetic induction heating pipe so as to guide the liquid matrix flowing into the liquid inlet channel into the magnetic induction heating pipe.
Furthermore, the atomization assembly further comprises a cylindrical non-metal fixing piece, the magnetic induction heating pipe is sleeved in the non-metal fixing piece, and a through hole penetrates through the non-metal fixing piece at a position corresponding to the liquid inlet channel.
In a second aspect, the present invention further provides an atomizer comprising an atomizing assembly as described in any of the above.
Furthermore, the atomizer also comprises an oil bin with an air outlet and a base arranged at the lower end of the oil bin, the atomizing assembly is arranged in the center of the oil bin, the upper end of the support is fixed in the air outlet, and the lower end of the support is inserted into the base; an oil storage cavity for storing oil is formed by enclosing among the oil bin, the base and the atomizing assembly, and the liquid inlet channel is communicated with the oil storage cavity; the base is further provided with at least one air inlet communicated with the atomization cavity, and the base is further provided with a positive pole bullet needle and a negative pole bullet needle which are respectively connected with two ends of the electromagnetic coil.
Furthermore, at least one oil absorption piece for absorbing the liquid matrix falling into the base in the atomizing cavity is arranged in the base.
A third aspect, the utility model also provides an electronic atomization device, include the host computer for the atomizer power supply, still including locating the host computer upper end and as aforesaid arbitrary the atomizer, be equipped with a circuit board in the host computer and the battery of being connected with the circuit board electricity, be equipped with two positive pole pins and the negative pole pin of being connected with positive pole bullet needle and negative pole bullet needle electricity respectively on the circuit board.
The utility model discloses following beneficial effect has:
the utility model discloses an atomizing subassembly adopts the magnetic induction heating pipe inside dispersion that porous metal made to distribute a large amount of directional or random holes, and it has imbibition and induction heating's effect at first, realizes solenoid to its induction heating, and utilizes the hole of regular or irregular distribution on the column wall, is favorable to concentrating the heat, improves the efficiency of generating heat and generates heat fast, and solenoid is porous metal coil, and the heat that produces itself is less because of porous existence, thereby has effectively reduced solenoid's generating heat; and the electromagnetic shield pipe that porous metal made, it is through encircleing the mode outside at solenoid, can prevent magnetism outwards propagation, reduces electromagnetic radiation, and porous structure still can play the effect of amortization simultaneously, has solved the current problem that generates heat inefficiency, noise are big and have electromagnetic radiation.
In addition, liquid matrix is when inlet passage gets into atomization component, it produces the contact with solenoid in the annular chamber earlier to enter into, it is of course, tobacco tar is not electrically conductive in the electron cigarette field, thereby usable liquid matrix plays certain cooling effect to solenoid, and the lower extreme of annular chamber is the opening, can make things convenient for electromagnetic shield pipe and solenoid's equipment, but for liquid matrix does not down flow from secondary opening part, utilize solenoid's interior periphery to mutually support with the wall of annular chamber and electromagnetic shield pipe respectively and realize the purpose of sealing, overall structure is simple, reliable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
FIG. 1 is a schematic view of an atomizing assembly in example 1;
FIG. 2 is a schematic view of an atomizing assembly in example 2;
FIG. 3 is a schematic view of an atomizer having the atomizing assembly of FIG. 1 in example 3;
FIG. 4 is a schematic view of an atomizer having the atomizing assembly of FIG. 2 according to example 3;
FIG. 5 is a schematic view of an electronic atomizer according to example 4 having the atomizer shown in FIG. 3;
fig. 6 is a schematic view of an electronic atomizer according to embodiment 4 having the atomizer shown in fig. 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Example 1
As shown in fig. 1, the atomizing assembly 100 of the present embodiment includes a bracket 1, a magnetic induction heating pipe 2, an electromagnetic coil 3, and an electromagnetic shielding pipe 4.
The center of the bracket 1 is provided with an atomization channel 10 which penetrates through the bracket up and down, a cavity for atomizing the liquid matrix and enabling the atomized smoke to flow upwards under the action of suction force, and the side edge of the bracket is also provided with at least one liquid inlet channel 11 which is communicated with the atomization channel 10 and the outside of the bracket so as to utilize the liquid inlet channel to introduce the liquid matrix outside the bracket into the atomization channel; and inlet channel's quantity is more, and the volume that the outer liquid matrix of support is leading-in to atomizing passageway is more and efficiency is faster, and when inlet channel 11's quantity was at least two, two at least inlet channel 11 arrange on the support with annular array's mode to guarantee the ascending inlet efficiency of each side, thereby realize each inlet channel's even feed liquor.
In addition, the magnetic induction heating pipe 2, the electromagnetic coil 3 and the electromagnetic shielding pipe 4 are all made of porous metal, namely, a large number of directional or random holes are distributed in the three in a dispersing way; the magnetic induction heating pipe 2 is arranged in the atomizing channel 10 and absorbs the liquid matrix entering the atomizing channel 10 from the liquid inlet channel by using the holes on the atomizing channel, namely in practice, the magnetic induction heating pipe seals the inner side hole opening of the liquid inlet channel, so that the liquid matrix can only flow to the magnetic induction heating pipe and is absorbed by the magnetic induction heating pipe; the electromagnetic coil 3 is arranged in the bracket 1 and surrounds the magnetic induction heating pipe, so that the magnetic induction heating pipe is positioned in an electromagnetic field in the middle of the electromagnetic coil, eddy current is generated under the action of the electromagnetic field and the magnetic induction heating pipe is heated, and the liquid matrix introduced into the magnetic induction heating pipe is atomized after the magnetic induction heating pipe is heated, so that the liquidity of the liquid matrix in the magnetic induction heating pipe can be improved in the atomization process, the atomization effect of the liquid matrix in the magnetic induction heating pipe is further ensured, and the aerosol formed by atomization has good taste; the electromagnetic shielding tube 4 is positioned in the bracket 1 and surrounds the periphery of the electromagnetic coil 3.
In the magnetic induction heating tube made of porous metal, a large number of directional or random tiny holes are dispersedly distributed in the magnetic induction heating tube, the magnetic induction heating tube has the effects of liquid absorption and induction heating at first, induction heating of the electromagnetic coil on the magnetic induction heating tube is realized, holes regularly or irregularly distributed on the column wall are utilized, the concentrated heat is facilitated, the heating efficiency is improved, and rapid heating is realized; the electromagnetic shielding tube made of porous metal can prevent the outward transmission of magnetism and reduce electromagnetic radiation by surrounding the electromagnetic coil, and meanwhile, the porous structure can also play a role in noise reduction.
Preferably, the atomizing channel 10 includes an air outlet channel 12 and an atomizing cavity 13 which are communicated up and down, the magnetic induction heating pipe 2 is arranged in the atomizing cavity 13, the liquid inlet channel is arranged around the atomizing cavity 13 and is communicated with the atomizing cavity to guide the liquid matrix into the atomizing cavity for atomizing, and the air outlet channel is used for an outflow channel after atomizing; the bracket 1 is also internally provided with an annular cavity 14 which is arranged around the atomizing cavity 13 and is mutually separated, the electromagnetic coil 3 and the electromagnetic shielding pipe 4 are sleeved in the annular cavity 14 from inside to outside, the liquid inlet channel 10 is sequentially communicated with the annular cavity 14 and the atomizing cavity 13, namely, the liquid inlet channel penetrates through the bracket from front to back along the radial direction, a through hole 41 is arranged at the position of the electromagnetic shielding pipe 4 corresponding to the liquid inlet channel 10 in a penetrating manner and is used for the inflow of liquid matrix, the electromagnetic coil 3 is a spiral coil with a gap, so that the liquid matrix enters the atomizing cavity 13 after passing through the gap, namely, the upper end and the lower end of the electromagnetic coil 3 and the upper end and the lower end of the electromagnetic shielding pipe are respectively positioned above and below the liquid inlet channel; in the aforesaid, utilize atomizing chamber and the annular chamber that sets up on the support to fix magnetic induction heating pipe, solenoid and electromagnetic shield pipe respectively, the equipment forms integral atomization component and uses, and overall structure is simple and the equipment is convenient with the dismantlement.
Preferably, in order to facilitate the installation of the electromagnetic coil and the electromagnetic shielding tube, the lower end of the annular cavity 14 is designed to be an opening, so that the electromagnetic coil and the electromagnetic shielding tube can be installed in the annular cavity from bottom to top from the opening; certainly, in order to avoid the liquid matrix entering the annular cavity from flowing downwards from the opening of the annular cavity, the inner circumferential surface and the outer circumferential surface of the electromagnetic coil 3 are respectively abutted with the inner circumferential surface of the annular cavity 14 and the inner circumferential surface of the electromagnetic shielding tube 4, namely, the electromagnetic coil is used for realizing the purpose of sealing, and the flow of the liquid matrix flows forwards by using a gap on the liquid matrix, so that the whole structure is simple and reliable, and the structure that an additional sealing piece is required to be used for sealing is reduced; during assembly, in order to facilitate the installation of the electromagnetic coil and the electromagnetic shielding pipe into the annular cavity, the electromagnetic coil and the electromagnetic shielding pipe are generally installed into the annular cavity together after being sleeved together, so that the inconvenience of installing the electromagnetic coil and the electromagnetic shielding pipe after being installed into the annular cavity due to the abutting relation of the electromagnetic coil and the electromagnetic shielding pipe is avoided.
Preferably, the atomizing assembly 100 further comprises a non-metallic oil guiding body 5, which is sleeved on the periphery of the magnetic induction heating tube 2, the oil guiding member has oil guiding and locking capabilities, so as to guide the liquid matrix flowing in the liquid inlet channel into the magnetic induction heating tube, so that the oil guiding body is used for absorbing oil and then guiding the oil to be dispersed on the whole magnetic induction heating tube, thereby effectively improving the oil guiding efficiency and the atomizing effect, the oil guiding body is non-metallic, and does not absorb magnetism and is heated by induction, which is beneficial to magnetism concentration and improves the heating efficiency of the magnetic induction heating tube; in addition, the oil-guiding body also plays a role in supporting and fixing the magnetic induction heating pipe, and generally, the magnetic induction heating pipe has certain flexibility, so a support is required to support the magnetic induction heating pipe.
In some alternative implementations, the porous metal may preferably be a metal felt or a metal foam; the metal felt is formed by weaving a plurality of metal fibers, so that the metal felt body is provided with a plurality of weaving holes, the liquid guiding effect is realized, meanwhile, in the suction process, the aerosol in the weaving holes can be taken out by suction airflow, and the taste of the aerosol is further ensured; the metal foam has a plurality of foam pores (i.e., the fine pores and/or micro-pores in the metal foam), the diameter of the foam pores can reach millimeter level, and the foam pores on the metal foam are almost or completely communicated with each other, so that the liquid guiding effect can be realized, and the aerosol on the metal foam can be carried out as far as possible.
In other embodiments, the oil-guiding member is made of cotton.
Example 2
As shown in fig. 2, an atomizing assembly 100 of the present embodiment has a structure substantially the same as that of embodiment 1, except that no oil guide is provided in the present embodiment; however, the atomizing assembly in this embodiment further includes a cylindrical non-metal fixing member 6, the magnetic induction heating tube 2 is sleeved in the non-metal fixing member 6, and plays a role in supporting and fixing the magnetic induction heating tube, and the non-metal fixing member 6 is provided with a through hole 61 at a position corresponding to the liquid inlet channel 11 in a penetrating manner, that is, in this embodiment, the magnetic induction heating tube is only used for guiding and heating, and the liquid guiding efficiency is a little lower than that of the structure in which the oil guiding body is used in embodiment 1.
In other embodiments, the non-metallic fastener is made of silicone.
Example 3
As shown in fig. 3 or 4, an atomizer 200 according to the present embodiment includes the atomizing assembly 100 according to embodiment 1 or embodiment 2.
In this embodiment, the atomizer further includes an oil bin 7 having an air outlet 71, and a base 72 disposed at a lower end of the oil bin 7, the atomizing assembly 100 is disposed at a center of the oil bin 7, an upper end of the bracket 1 is fixed in the air outlet 71, and a lower end thereof is inserted into the base 72; an oil storage cavity 73 for storing liquid matrix is formed by the oil bin 7, the base 72 and the atomization assembly 100 in an enclosing manner, and the liquid inlet channel 11 is communicated with the oil storage cavity 73 so as to guide the liquid matrix in the oil storage cavity into the atomization cavity for atomization; the base 72 is further provided with at least one air inlet 74 communicated with the atomizing chamber 13 to realize air flow when air is sucked outwards, and the base 72 is further provided with a positive pole pogo pin 75 and a negative pole pogo pin 76 respectively connected with two ends of the electromagnetic coil 3.
In this embodiment, at least one oil sucking member 77 for sucking the liquid matrix falling into the base from the atomizing chamber 13 is further provided in the base 72.
In other embodiments, the oil absorbing member is made of porous metal.
Example 4
As shown in fig. 5 or 6, the electronic atomizing device of this embodiment includes a main body 300 for supplying power to an atomizer 200, and further includes the atomizer 200 according to embodiment 3, which is sleeved on an upper end of the main body, a circuit board 301 and a battery 302 electrically connected to the circuit board 301 are disposed in the main body 300, a positive pin 303 and a negative pin 304 are disposed on the circuit board 301, the positive pin 303 and the negative pin 304 respectively extend upward out of the main body, wherein an upper end of the positive pin is abutted against the positive pogo pin 75 to realize electrical connection, an upper end of the negative pin is abutted against the negative pogo pin 76 to realize electrical connection, so as to supply power to an electromagnetic coil in the atomizer by using the battery, and the circuit board is used for controlling on-off and charging operations of a power supply; of course, a push switch and a charging interface (not shown) are provided on the circuit board to control the power supply and charge the battery.
Of course, an inlet 305 communicating with the intake port 74 is further provided on the wall surface of the main body 300 in order to achieve the intake of the intake port.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention, and these modifications or substitutions are intended to be covered by the scope of the invention; therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An atomizing assembly, comprising:
the center of the bracket is provided with a through atomizing channel and the side edge of the bracket is also provided with at least one liquid inlet channel communicated with the atomizing channel and the outside of the bracket;
the magnetic induction heating pipe is made of porous metal and is arranged in the atomizing channel and used for sucking the liquid matrix entering the atomizing channel from the liquid inlet channel;
the electromagnetic coil is made of porous metal and is arranged in the bracket and used for heating the magnetic induction heating pipe so as to atomize the liquid matrix led into the magnetic induction heating pipe after heating;
and the electromagnetic shielding tube is made of porous metal and is positioned in the bracket and arranged around the periphery of the electromagnetic coil.
2. The atomizing assembly of claim 1, wherein the porous metal is a metal felt or a metal foam.
3. The atomizing assembly of claim 1, wherein the atomizing channel comprises an air outlet channel and an atomizing cavity which are communicated with each other up and down, and the magnetic induction heating pipe is arranged in the atomizing cavity; still be equipped with one in the support and encircle the annular chamber that the atomizing chamber set up, the annular intracavity is all located to solenoid and electromagnetic shield pipe, inlet channel communicates annular chamber and atomizing chamber in proper order, just electromagnetic shield pipe runs through in the position department that corresponds inlet channel and is equipped with the via hole, solenoid is for having gapped spiral coil to make liquid matrix get into in the atomizing chamber after the clearance.
4. The atomizing assembly of claim 3, wherein the lower end of the annular chamber is open, and the inner circumferential surface and the outer circumferential surface of the electromagnetic coil abut against the inner circumferential surface of the annular chamber and the inner circumferential surface of the electromagnetic shielding tube, respectively, to close the opening.
5. The atomizing assembly of any one of claims 1 to 4, further comprising a non-metallic oil-guiding body which is fitted around the outer periphery of said magnetically induced heating tube to guide the liquid medium flowing in the liquid-feeding passage to said magnetically induced heating tube.
6. The atomizing assembly of any one of claims 1 to 4, further comprising a cylindrical non-metallic fixing member, wherein the magnetic induction heating pipe is sleeved in the non-metallic fixing member, and a through hole is formed in the non-metallic fixing member at a position corresponding to the liquid inlet channel.
7. A nebulizer comprising a nebulizing assembly according to any one of claims 1 to 6.
8. The atomizer according to claim 7, further comprising an oil sump having an air outlet, and a base disposed at a lower end of the oil sump, wherein the atomizing assembly is disposed at a center of the oil sump, and an upper end of the bracket is fixed in the air outlet, and a lower end thereof is inserted into the base; an oil storage cavity for storing oil is formed by enclosing among the oil bin, the base and the atomizing assembly, and the liquid inlet channel is communicated with the oil storage cavity; the base is further provided with at least one air inlet communicated with the atomizing channel, and the base is further provided with a positive pole spring needle and a negative pole spring needle which are respectively connected with two ends of the electromagnetic coil.
9. The atomizer of claim 8, wherein at least one oil suction member is further disposed in said base for sucking up liquid matrix falling into said base in said atomizing passage.
10. An electronic atomising device comprising a main unit for supplying power to an atomiser, characterised in that it further comprises an atomiser as claimed in any one of claims 7 to 9 provided at an upper end of the main unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222155811.1U CN218219179U (en) | 2022-08-16 | 2022-08-16 | Atomization assembly, atomizer and electronic atomization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222155811.1U CN218219179U (en) | 2022-08-16 | 2022-08-16 | Atomization assembly, atomizer and electronic atomization device |
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| Publication Number | Publication Date |
|---|---|
| CN218219179U true CN218219179U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222155811.1U Active CN218219179U (en) | 2022-08-16 | 2022-08-16 | Atomization assembly, atomizer and electronic atomization device |
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| CN (1) | CN218219179U (en) |
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- 2022-08-16 CN CN202222155811.1U patent/CN218219179U/en active Active
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