CN215775533U - Separated atomizer and aerosol generating device - Google Patents
Separated atomizer and aerosol generating device Download PDFInfo
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- CN215775533U CN215775533U CN202120843234.8U CN202120843234U CN215775533U CN 215775533 U CN215775533 U CN 215775533U CN 202120843234 U CN202120843234 U CN 202120843234U CN 215775533 U CN215775533 U CN 215775533U
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- atomizing
- pipe
- atomizer
- split
- air channel
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- 239000000443 aerosol Substances 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 239000006199 nebulizer Substances 0.000 claims abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims description 27
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 206010063659 Aversion Diseases 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008263 liquid aerosol Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a separated atomizer and an aerosol generating device. A split nebulizer, comprising: a housing provided with a mouthpiece portion and a liquid storage chamber; the sealing seat is arranged at the lower part of the shell and is used for sealing the liquid storage cavity; the atomizing assembly is arranged in the central hole of the sealing seat and is used for adsorbing the base material and atomizing the base material into aerosol; the air channel pipe is arranged in the shell, moves relative to the atomizing assembly and is used for realizing switching between a conduction state and a separation state between the liquid storage cavity and the atomizing assembly; wherein, the seal receptacle is provided with spacing portion, and it is used for preventing the air duct pipe is at the aversion under the unstressed state. The separated atomizer provided by the utility model is additionally provided with the limiting part on the sealing seat to prevent the air channel pipe from shifting in an unstressed state, namely, the air channel pipe is prevented from moving upwards to separate from the sealing seat to cause liquid leakage due to the transportation or shaking process and other factors.
Description
Technical Field
The utility model relates to the technical field of aerosol generation, in particular to a separated atomizer and an aerosol generating device.
Background
Aerosol-generating devices generate an aerosol by heating and atomizing a liquid aerosol base material in a non-combustible manner, and in recent years, aerosol-generating devices have been widely used. The atomizer of current aerosol generating device is the design of non-separating structure for the substrate that treats to form the aerosol contacts with atomizing core in advance, causes at the transportation and the in-process leakproofness of selling not good, leads to leaking.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a separate atomizer and an aerosol generating device.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a split nebulizer, comprising:
a housing having a mouthpiece portion and a reservoir chamber for storing an aerosol base;
the sealing seat is arranged at the lower part of the shell and is used for sealing the liquid storage cavity;
the atomizing assembly is arranged in the central hole of the sealing seat and is used for adsorbing the base material and atomizing the base material into aerosol;
the air channel pipe is arranged in the shell, moves relative to the atomizing assembly and is used for realizing switching between a conduction state and a separation state between the liquid storage cavity and the atomizing assembly; wherein,
the seal holder is provided with a limiting part for preventing the air passage pipe from shifting in an unstressed state.
As a preferred embodiment of the separated atomizer provided by the present invention, the sealing seat is provided with a through hole, the through hole is communicated with the liquid storage cavity, and the through hole is provided with a sealing pin for sealing or opening the through hole.
As a preferred embodiment of the split atomizer provided in the present invention, the atomizing assembly includes a tubular support, a heat generating member fixed in the support, an adsorbing portion disposed around the heat generating member, and an atomizing pipe disposed around the adsorbing portion; after the support is assembled on the sealing seat, a material guide groove is formed between the atomizing pipe and the sealing seat, and a material guide opening is formed in the area, corresponding to the material guide groove, of the support.
As a preferred embodiment of the split atomizer provided in the present invention, the upper end of the air duct is movably connected to the housing, and the lower end of the air duct is inserted into or pulled out of the material guide chute.
As a preferred embodiment of the split atomizer provided by the present invention, a convex portion is provided on an outer side of a lower end of the air passage tube, and when the lower end of the air passage tube is fitted into the guide chute, the limit portion presses the convex portion; when the lower end is pulled out of the guide chute, the limiting part props against the convex part.
As a preferred embodiment of the separation type atomizer provided by the present invention, the adsorption part includes an inner adsorption part and an outer adsorption part, the inner adsorption part is surrounded on the heat generating member and located inside the bracket, the outer adsorption part is surrounded outside the bracket corresponding to the inner adsorption part, and the atomization tube is located between the inner adsorption part and the outer adsorption part.
As a preferred embodiment of the split atomizer provided in the present invention, the suction nozzle portion is provided with a sliding cavity, and an upper end of the air duct pipe is movably connected in the sliding cavity.
As a preferred embodiment of the separation type atomizer provided in the present invention, the separation type atomizer further includes a force application portion which is inserted into the air passage tube, and the force application portion is inserted into the air passage tube to apply force to the air passage tube; the force application part is pulled out of the air channel pipe to conduct the atomizing pipe and the mouthpiece part.
An aerosol generating device comprising a separate atomiser as described above.
As a preferred embodiment of the aerosol generating device provided by the present invention, the aerosol generating device further includes a casing, a battery cell disposed in the casing, a bottom cover disposed at a lower end of the casing, a control board disposed on the bottom cover, and a microphone cover disposed at an end of the bottom cover; the bottom cover is provided with an air inlet, and airflow entering from the air inlet enters the atomizing pipe after passing through the microphone sleeve, the inner cavity of the shell and the air inlet so as to take aerosol formed by atomization out of the air channel pipe to the mouthpiece part.
Compared with the prior art, the utility model has the following beneficial effects:
the separated atomizer provided by the utility model is additionally provided with the limiting part on the sealing seat to prevent the air channel pipe from shifting in an unstressed state, namely, the air channel pipe is prevented from moving upwards to separate from the sealing seat to cause liquid leakage due to the transportation or shaking process and other factors.
Specifically, when the lower end of the air channel pipe is abutted against the sealing seat in the non-use state, the limiting part presses the lower end of the air channel pipe to positively fix the air channel pipe; in a use state, the lower end of the air channel pipe is separated from the sealing seat so that the base material is contacted with the atomizing pipe, and at the moment, the limiting part props against the lower end of the air channel pipe to fix the air channel pipe reversely; structural design like this, it is right not only to realize through a spacing portion the air duct pipe carries out the forward and fixes and so as to prevent that the air duct pipe from leading to up-moving and then arousing the weeping because of transportation or rocking process and other factors, but also can be right the air duct pipe carries out reverse fixed in order to prevent to cause the air duct pipe to move down and hinder the feed because of the use.
Drawings
In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.
FIG. 1 is a front view of a split atomizer according to the present invention;
FIG. 2 is a side view of the split atomizer of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 5 is a sectional view taken along line A-A of the separate atomizer of the present invention with the trough open, wherein the direction of the arrows indicates the direction of flow of the substrate material into the atomizing assembly;
FIG. 6 is a sectional view taken along line B-B of the divided type atomizer according to the present invention with the chute opened;
FIG. 7 is a sectional view taken along line A-A of the separable atomizer in a state where the force applying part is removed from the atomizer according to the present invention;
FIG. 8 is a sectional view taken along line B-B of the separable atomizer in a state where the force applying part is removed from the atomizer according to the present invention;
FIG. 9 is an exploded view of the split atomizer of the present invention;
figure 10 is a cross-sectional view of an aerosol generating device of the present invention;
figure 11 is another cross-sectional view of an aerosol generating device of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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 utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
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; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 9, the present embodiment provides a separated atomizer 100, which includes:
a housing 1 having a mouthpiece portion 11 and a reservoir chamber 12, the reservoir chamber 12 for storing an aerosol substrate;
a sealing seat 2 connected with the lower part of the shell 1 and used for sealing the liquid storage cavity 12;
an atomizing assembly 3 disposed in the central hole 24 of the sealing seat 2, the atomizing assembly 3 being used for adsorbing the base material and atomizing the base material into aerosol;
the air channel pipe 4 is arranged in the shell 1, moves relative to the atomizing component 3 and is used for realizing switching between a conduction state and a separation state between the liquid storage cavity 12 and the atomizing component 3; wherein,
the seal holder 2 is provided with a stopper portion 21 for preventing displacement of the airway tube 4 in an unstressed state.
Through the above structural design, the separation type atomizer 100 prevents the displacement of the air duct pipe 4 in an unstressed state by additionally arranging the limiting part 21 on the seal holder 2, namely, prevents the air duct pipe 4 from separating from the seal holder 2 to cause liquid leakage due to upward movement caused by transportation or shaking process and other factors. When the air channel pipe 4 is not used, the lower end 42 of the air channel pipe 4 is abutted against the sealing seat 2, and the limiting part 21 presses the lower end 42 of the air channel pipe 4 to fix the air channel pipe 4 in a forward direction, as shown in fig. 5 and 7; when the device is used, the lower end 42 of the air channel pipe 4 is separated from the sealing seat 2, so that the base material is in contact with the atomizing pipe 34, and at the moment, the limiting part 21 of the limiting part 21 props against the lower end 42 of the air channel pipe 4, so as to fix the air channel pipe 4 reversely, as shown in fig. 6 and 8.
Further, the sealing seat 2 is provided with a through hole 22 for facilitating the supplement of the base material. Further, the through hole 22 is provided with a sealing pin 23 for sealing or opening the through hole 22 to facilitate charging.
Further, the atomizing assembly 3 includes a tubular bracket 31 for connecting to the seal holder 2, a heat generating member 32 fixed in the bracket 31, an adsorbing portion 33 disposed around the heat generating member 32, and an atomizing tube 34 disposed around the adsorbing portion 33; after the atomizing assembly 3 is assembled to the sealing seat 2 through the bracket 31, a material guide chute 5 is formed between the atomizing pipe 34 and the sealing seat 2. The diameter of the lower end of the bracket 31 is slightly larger than that of the upper end, the lower end of the bracket 31 is clamped in the lower part of the central hole 24 of the sealing seat 2, and one end (namely the lower end) of the bracket 31, which is far away from the heating element 32, is provided with an air inlet 35, so that air flow can enter conveniently; furthermore, the lower end of the bracket 31 is sleeved with an atomized silica gel 36, and a lead hole is formed in the atomized silica gel 36, so that a lead of the heating element 32 can be conveniently led out and fixed.
Further, the adsorption part 33 includes an inner adsorption part 331 and an outer adsorption part 332, the inner adsorption part 331 is surrounded on the heating element 32 and is located in the bracket 31, it can be understood that the inner adsorption part 331 is disposed between the heating element 32 and the inner wall of the upper end of the bracket 31, the outer adsorption part 332 and the inner adsorption part 331 are correspondingly surrounded on the outer wall of the upper end of the bracket 31, further, the atomizing pipe 34 is sleeved on the outer adsorption part 332, and then a material guide groove 5 is formed between the atomizing pipe 34 and the upper part of the central hole 24. Preferably, but not limited to, the material of the adsorption part 33 is cotton.
Further, the upper end 41 of the air duct pipe 4 is movably connected to the air outlet 111 of the mouthpiece part 11 of the housing 1, and preferably, the upper end 41 of the air duct pipe 4 is connected to the inner wall of the air outlet 11 through a sealing ring to improve the sealing performance; more preferably, the mouthpiece section 11 is provided with a sliding chamber 112 in the region of the air outlet 111, so that the upper end 41 of the air passage tube 4 moves up and down in the sliding chamber 112, and the moving stroke of the upper end 41 of the air passage tube 4 is also limited. The lower end 42 of the air channel tube 4 is sleeved in or pulled out of the material guide chute 5, and it can be understood that the lower end 42 of the air channel tube 4 enters or moves out of the material guide chute 5 along with the up-and-down movement of the air channel tube 4, namely, the material guide chute 5 is sealed or the material guide chute 5 is opened.
Further, the diameter of the lower end 42 of the airway tube 4 is not less than the diameter of the upper end 41 of the airway tube 4. A convex part 43 is arranged on the outer side of the lower end 42 of the air channel pipe 4, and when the lower end is sleeved in the guide chute 5, the limiting part 21 presses the convex part 43; when the lower end is pulled out of the material guide groove 5, the limiting part 21 props against the convex part 43, the limiting part 21 is made of an elastic part, such as silica gel, and is pushed open under stress, and is reset under the condition of no stress. Preferably, the outer side of the upper part of the convex part 43 is provided with a transition inclined surface, so as to be convenient for jacking the limiting part 21 when ascending. The convex part 43 and the limiting part 21 are used in a matched manner, so that the air channel pipe 4 is fixed in the forward direction and the reverse direction, unnecessary displacement of the air channel pipe 4 is avoided, specifically, when the lower end 42 of the air channel pipe 4 abuts against the guide chute 5 on the sealing seat 2 in a non-use state, the limiting part 21 presses the lower end 42 of the air channel pipe 4 to fix the air channel pipe 4 in the forward direction, the guide chute 5 is sealed, and feeding cannot be conducted to cut off the communication between the liquid storage cavity 12 and the atomizing pipe 34; in a use state, the lower end 42 of the air channel tube 4 is forced to be separated from the liquid storage tank of the seal seat 2, so that the guide chute 5 is opened to conduct the liquid storage cavity 12 and the atomizing tube 34, so that the base material is in contact with the atomizing tube 34, and at the moment, the limiting part 21 of the limiting part 21 props against the lower end 42 of the air channel tube 4 to fix the air channel tube 4 reversely. Structural design like this, it is right not only to realize through a spacing portion 21 the air duct pipe 4 carries out the forward and fixes in order to prevent that air duct pipe 4 from leading to up-moving and then arousing the weeping because of transportation or rocking process and other factors, but also can be to air duct pipe 4 carries out reverse fixed in order to prevent to cause air duct pipe 4 to move down and hinder the feed because of the use.
Further, the separation type atomizer 100 further includes a force application portion 6 which is inserted into the air passage tube 4, and the force application portion 6 is inserted into the air passage tube 4 to apply force to the air passage tube 4; the urging portion 6 is pulled out of the air passage tube 4 to communicate the atomizing tube 34 and the mouthpiece portion 11. Further, the material of the force application portion 6 is preferably, but not limited to, silicone. Specifically, the force application portion 6 is configured as a rod-shaped structure, a buckle portion 61 is disposed at an end portion of the force application portion 6, correspondingly, the air channel tube 4 is provided with a buckle portion 44 for clamping the buckle portion 61, and preferably, a transition step is disposed at a connection portion between the lower end 42 and the upper end of the air channel tube 4 as the buckle portion 44. When in specific use, the process that one end of the force application part 6 with the buckle part 61 is inserted into the air channel pipe 4 to reach the buckle position 44 also drives the air channel pipe 4 to move downwards to enter the material guide groove 5; the force application part 6 is pulled, the buckling part 61 is buckled by the buckling position 44, so that the air channel pipe 4 is driven to move upwards to be separated from the material guide groove 5 when the force application part 6 is pulled, as shown in fig. 5 and 6, the force application part 6 is continuously pulled until the force application part 6 is pulled out, as shown in fig. 7 and 8, the air channel pipe 4 and the air outlet are in a conducting state, and an aerosol generation step can be carried out. Preferably, the force application part 6 is a silica gel rod, so that the pulling and inserting for multiple times are facilitated.
Example 2
Referring to fig. 10 and 11, the present embodiment provides an aerosol generating device including the above-mentioned separation-type atomizer 100.
Further, the aerosol generating device further comprises a chassis 200 detachably connected with the housing 1, a battery cell 300 arranged in the chassis 200, a bottom cover 400 arranged at the lower end of the chassis 200, a control board 500 arranged on the bottom cover 400, and a microphone cover 600 sleeved at the end of the bottom cover 400; the bottom cover 400 is provided with an air inlet, and the airflow entering from the air inlet enters the atomizing pipe 34 after passing through the microphone cover 600, the inner cavity of the casing 200 and the air inlet 35, so as to take the aerosol formed by atomization out of the air passage pipe 4 to the mouthpiece 11. The battery cell 300 is connected to the control board 500, and the heating element 32 is connected to the control board 500 via a wire.
The separation type atomizer 100 adopted by the aerosol generating device provided by the embodiment prevents the air channel pipe 4 from moving in an unstressed state by additionally arranging the limiting part 21 on the seal holder 2, namely, prevents the air channel pipe 4 from separating from the seal holder 2 to cause liquid leakage due to upward movement caused by transportation or shaking process and other factors. Structural design like this, it is right not only to realize through a spacing portion 21 the air duct pipe 4 carries out the forward and fixes in order to prevent that air duct pipe 4 from leading to up-moving and then arousing the weeping because of transportation or rocking process and other factors, but also can be to air duct pipe 4 carries out reverse fixed in order to prevent to cause air duct pipe 4 to move down and hinder the feed because of the use.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the utility model and do not limit the scope of the utility model. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. A split nebulizer, comprising:
a housing having a mouthpiece portion and a reservoir for storing an aerosol base;
the sealing seat is arranged at the lower part of the shell and is used for sealing the liquid storage cavity;
the atomizing assembly is arranged in the central hole of the sealing seat and is used for adsorbing the base material and atomizing the base material into aerosol;
the air channel pipe is arranged in the shell, moves relative to the atomizing assembly and is used for realizing switching between a conduction state and a separation state between the liquid storage cavity and the atomizing assembly; wherein,
the seal holder is provided with a limiting part for preventing the air passage pipe from shifting in an unstressed state.
2. The split atomizer of claim 1, wherein said seal holder defines a through hole, said through hole communicating with said reservoir chamber, a seal pin disposed in said through hole for sealing or opening said through hole.
3. The split atomizer of claim 1, wherein said atomizing assembly comprises a tubular support, a heat generating member fixed within said support, an adsorption portion disposed around said heat generating member, an atomizing tube disposed around said adsorption portion; after the support is assembled on the sealing seat, a material guide groove is formed between the atomizing pipe and the sealing seat, and a material guide opening is formed in the area, corresponding to the material guide groove, of the support.
4. The split atomizer of claim 3, wherein said air duct has an upper end movably connected to said housing and a lower end engaging or disengaging said chute.
5. The split atomizer according to claim 4, wherein a convex portion is provided on an outer side of a lower end of the air passage pipe, and when the lower end of the air passage pipe is fitted into the material guide chute, the limit portion presses the convex portion; when the lower end is pulled out of the guide chute, the limiting part props against the convex part.
6. The separate atomizer of claim 3, wherein said adsorption portion comprises an inner adsorption portion and an outer adsorption portion, said inner adsorption portion being enclosed on said heat generating member and located within said support, said outer adsorption portion being enclosed outside said support in correspondence with said inner adsorption portion, said atomizing tube being located between said inner adsorption portion and said outer adsorption portion.
7. A split nebulizer as claimed in claim 1, wherein the mouthpiece portion is provided with a sliding chamber, and the upper end of the airway tube is movably connected within the sliding chamber.
8. The split nebulizer of claim 1, further comprising a force applying portion that is inserted into the air passage tube and is inserted into the air passage tube to apply force to the air passage tube; the force application part is pulled out of the air channel pipe to conduct the atomizing pipe and the mouthpiece part.
9. An aerosol generating device comprising a split nebulizer as claimed in any one of claims 1 to 8.
10. The aerosol generating device of claim 9, further comprising a housing, a battery cell disposed in the housing, a bottom cover disposed at a lower end of the housing, a control board disposed on the bottom cover, and a microphone cover disposed at an end of the bottom cover; the bottom cover is provided with an air inlet, and airflow entering from the air inlet enters the atomizing pipe after passing through the microphone sleeve, the inner cavity of the shell and the air inlet so as to take aerosol formed by atomization out of the air channel pipe to the mouthpiece part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120843234.8U CN215775533U (en) | 2021-04-22 | 2021-04-22 | Separated atomizer and aerosol generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120843234.8U CN215775533U (en) | 2021-04-22 | 2021-04-22 | Separated atomizer and aerosol generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215775533U true CN215775533U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120843234.8U Active CN215775533U (en) | 2021-04-22 | 2021-04-22 | Separated atomizer and aerosol generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215775533U (en) |
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2021
- 2021-04-22 CN CN202120843234.8U patent/CN215775533U/en active Active
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