CN216906831U - Electronic cigarette and oil quantity detection device thereof - Google Patents
Electronic cigarette and oil quantity detection device thereof Download PDFInfo
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- CN216906831U CN216906831U CN202220053208.XU CN202220053208U CN216906831U CN 216906831 U CN216906831 U CN 216906831U CN 202220053208 U CN202220053208 U CN 202220053208U CN 216906831 U CN216906831 U CN 216906831U
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Abstract
The utility model discloses an electronic cigarette and an oil quantity detection device thereof, wherein the electronic cigarette comprises a base and an oil bin with an oil storage cavity, and the oil quantity detection device also comprises: the reflecting surface is arranged at the bottom of the oil storage cavity; the light detection assembly is arranged in the base and used for emitting incident light to the reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not; the liquid level detection of the tobacco tar in the oil storage cavity is innovatively carried out by utilizing the optical detection assembly, so that the phenomenon of cotton burning in different degrees caused by forced use of a user after the tobacco tar is exhausted is avoided; and, the optical detection component sets up in the base, with the electrode tip of optical detection component accomodates in the base, avoid the electrode tip to expose and the damage that leads to.
Description
Technical Field
The utility model relates to the technical field of electronic cigarettes, in particular to an electronic cigarette and an oil quantity detection device thereof.
Background
The electronic cigarette is an electronic product simulating a cigarette, has the same taste and feeling as the cigarette, and is a product which is powered by a rechargeable lithium polymer battery to drive an atomizer, and can be sucked by a user after nicotine and the like are changed into steam by heating tobacco tar in an oil storage cavity.
At present, electronic cigarettes in the market determine whether to add tobacco tar or not by judging the oil quantity in an oil storage cavity through visual inspection, but the general oil storage cavity is made of semitransparent materials and the oil quantity is difficult to see clearly; moreover, if the user forgets to add the oil, the cotton burning phenomenon of different degrees can be caused, and even the atomizer is burnt out in serious cases.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an electronic cigarette and an oil quantity detection device thereof, and aims to solve the technical problem that the electronic cigarette in the prior art cannot detect whether the tobacco tar in an oil storage cavity is lower than a preset liquid level.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the utility model provides an oil mass detection device, which is applied to an electronic cigarette, wherein the electronic cigarette comprises a base and an oil bin with an oil storage cavity, and the oil mass detection device also comprises: a reflecting surface provided at the bottom of the oil storage chamber; and the light detection assembly is arranged in the base and used for emitting incident light to the reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
Compared with the prior art, the liquid level detection of the tobacco tar in the oil storage cavity is innovatively carried out by utilizing the optical detection assembly, so that the phenomenon of cotton burning in different degrees caused by forced use of a user after the tobacco tar is exhausted is avoided; and, the optical detection component sets up in the base, with the electrode tip of optical detection component accomodates in the base, avoid the electrode tip to expose and the damage that leads to.
In a preferred embodiment, the light detection assembly comprises a light emitter, a light receiver, and a circuit board; the optical transmitter and the optical receiver are connected to the circuit board.
In a preferred embodiment, an accommodating cavity is formed in the base, the light detection assembly is arranged in the accommodating cavity, and the light detection assembly is positioned below the oil storage cavity; wherein the light emitter, the reflection surface and the light receiver are positioned on the same light path; when the light receiver receives the light emitted by the light emitter, the tobacco tar liquid level in the oil storage cavity is lower than a preset liquid level.
In a preferred embodiment, a light-transmitting block which protrudes towards the accommodating cavity is arranged at the bottom of the oil bin, the light-transmitting block is arranged corresponding to the reflecting surface, and the light-transmitting block is provided with an incident surface and an emergent surface; the incident ray of the light emitter is vertically arranged relative to the incident plane, and the incident angle of the incident ray is larger than the critical angle; the light received by the light receiver is vertically arranged relative to the emergent surface.
In a preferred embodiment, the reflective surface comprises a first reflective surface and a second reflective surface; the bottom of the oil storage cavity is provided with a light transmitting block which is arranged in a protruding manner towards the oil storage cavity, the light transmitting block is provided with a first reflecting surface and a second reflecting surface, and an included angle is formed between the first reflecting surface and the second reflecting surface; when the incident light of the light emitter is reflected to the second reflecting surface through the first reflecting surface and then enters the light receiver, the tobacco tar liquid level in the oil storage cavity is lower than the preset liquid level.
The utility model also provides an oil mass detection device, which is applied to an electronic cigarette, wherein the electronic cigarette comprises a base and an oil bin with an oil storage cavity, and the oil mass detection device also comprises: the oil bin is also provided with a cavity, the cavity is positioned on the side of the oil storage cavity, and the bottom of the cavity is provided with a first reflecting surface; a second reflecting surface is arranged at the bottom of the oil storage cavity, and an included angle is formed between the second reflecting surface and the first reflecting surface; and the light detection assembly is arranged in the base and used for emitting incident light to the first reflecting surface or the second reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
Compared with the prior art, the liquid level detection of the tobacco tar in the oil storage cavity is innovatively carried out by using the optical detection assembly, so that the phenomenon of cotton burning in different degrees caused by forced use of a user after the tobacco tar is exhausted is avoided; and, the optical detection component sets up in the base, with the electrode tip of optical detection component accomodates in the base, avoid the electrode tip to expose and the damage that leads to.
In a preferred embodiment, the light detection assembly comprises a light emitter, a light receiver, and a circuit board; the optical transmitter and the optical receiver are connected to the circuit board.
In a preferred embodiment, an accommodating cavity is formed in the base, the light detection assembly is arranged in the accommodating cavity, and the light detection assembly is positioned below the oil storage cavity and the cavity; wherein the optical transmitter, the first reflecting surface, the second reflecting surface and the optical receiver are positioned on the same optical path; when the incident light of the light emitter is reflected to the first reflecting surface through the second reflecting surface and then enters the light receiver, or the incident light of the light emitter is reflected to the second reflecting surface through the first reflecting surface and then enters the light receiver, the tobacco tar liquid level in the oil storage cavity is lower than the preset liquid level.
The utility model also provides an electronic cigarette which comprises the oil quantity detection device.
For a better understanding and practice, the utility model is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front exploded view of embodiment 1;
FIG. 2 is a front sectional view of embodiment 1 (the tobacco level is lower than a preset level);
FIG. 3 is a front sectional view of embodiment 1 (smoke level higher than preset level);
FIG. 4 is a top sectional view of embodiment 1;
FIG. 5 is a front exploded view of embodiment 2;
FIG. 6 is a front sectional view of embodiment 2 (the tobacco level is lower than the preset level);
FIG. 7 is a front sectional view of embodiment 2 (the level of the soot is higher than a preset level);
FIG. 8 is a top sectional view of embodiment 2;
FIG. 9 is a front exploded view of the preferred embodiment 3;
FIG. 10 is a front cross-sectional view of example 3 (tobacco level below a preset level);
FIG. 11 is a cross-sectional view A-A of FIG. 10 (the tobacco level is below the predetermined level);
FIG. 12 is a front sectional view of embodiment 3 (the level of the soot is higher than a preset level);
FIG. 13 is a cross-sectional view A-A of FIG. 12 (the soot level is above the predetermined level).
Detailed Description
In order to better illustrate the utility model, the utility model is described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application 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 also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The utility model provides an electronic cigarette and an oil quantity detection device thereof, which can detect whether the liquid level of tobacco tar in an oil storage cavity is lower than a preset liquid level, send out a corresponding signal and perform corresponding operation, and avoid cotton burning phenomena of different degrees caused by forced use of a user after the tobacco tar is exhausted.
Example 1
Specifically, the present invention provides an oil amount detection device, which is applied to an electronic cigarette, wherein the electronic cigarette comprises a base 2 and an oil bin 1 having an oil storage cavity, and the oil amount detection device further comprises: a reflecting surface 111 provided at the bottom of the oil reservoir chamber 11; and the light detection assembly is arranged in the base and used for emitting incident light to the reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
Compared with the prior art, the liquid level detection of the tobacco tar in the oil storage cavity is innovatively carried out by utilizing the optical detection assembly, so that the phenomenon of cotton burning in different degrees caused by forced use of a user after the tobacco tar is exhausted is avoided;
compared with the technology that the optical detection component is arranged in the oil bin and then electrically connected with the base through the electrode end, the optical detection component is arranged in the base, the electrode end of the optical detection component is contained in the base, and damage caused by exposure of the electrode end is avoided.
In one embodiment, the light detection assembly includes a light emitter 31, a light receiver 32, and a circuit board 33; the optical transmitter and the optical receiver are connected to the circuit board. The light emitter and the light receiver are connected to the circuit board to form a whole, so that the light detection assembly is convenient to mount; and the circuit board is electrically connected with the control module in the base through a lead or an electrode end, so that the electrical connection and the signal transmission are realized.
As shown in fig. 1 to 4, an accommodating cavity 21 is formed in the base 2, the light detection assembly is arranged in the accommodating cavity 21, and the light detection assembly is located below the oil storage cavity; wherein the light emitter, the reflecting surface and the light receiver are positioned on the same light path; when the light receiver receives the light emitted by the light emitter, the liquid level of the tobacco tar in the oil storage cavity is lower than a preset liquid level.
Further, a light transmitting block 12 protruding towards the accommodating cavity is arranged at the bottom of the oil bin, the light transmitting block is arranged corresponding to the reflecting surface, and the light transmitting block is provided with an incident surface and an emergent surface; the incident ray of the light emitter is vertically arranged relative to the incident plane, and the incident angle of the incident ray is larger than the critical angle; the light received by the light receiver is vertically arranged relative to the emergent surface.
Furthermore, the light emitter and the light receiver are laterally attached to the circuit board at a certain angle, so that the light emitter and the light receiver can be conveniently installed and connected.
Specifically, when the liquid level of the soot in the oil storage cavity is lower than a preset liquid level, the light emitter 31 emits an incident light to the reflection surface 111, the incident light is reflected to the light receiver 32 through the reflection surface under the action of the total reflection principle, and the light receiver 32 receives the light emitted by the light emitter 31 and generates a low liquid level signal (the low liquid level signal here may be a high level signal or a low level signal, which is specifically determined according to an actual circuit, and the present invention is not limited);
when the liquid level of the tobacco tar in the oil storage cavity is higher than a preset liquid level, the light emitter 31 emits incident light to the reflecting surface 111, the incident light enters the oil storage cavity 11 under the action of a total reflection principle, and the light receiver cannot receive the light emitted by the light emitter and then generates a high liquid level signal (the low liquid level signal here can be a low level signal or a high level signal, and is specifically determined according to an actual circuit, and the utility model is not limited);
the low liquid level signal or the high liquid level signal is transmitted to a control module in the base through a wire or an electrode end, and the control module performs corresponding operation (for example, turning on a warning light or stopping the work of an atomizer, etc.) according to the low liquid level signal, which is not limited in the utility model.
It should be noted that the preset liquid level is determined according to an intersection point of an incident light and the reflecting surface, and the reflecting surface may be determined according to actual requirements, that is, the reflecting surface may be set at the bottom of the oil storage cavity, or may be set higher than the bottom of the oil storage cavity.
Example 2
As shown in fig. 5 to 8, the present embodiment is different from embodiment 1 in that the reflection surface includes a first reflection surface 111a and a second reflection surface 111 b; the bottom of the oil storage cavity 11 is provided with a light transmitting block 12 which protrudes towards the oil storage cavity, the light transmitting block is provided with the first reflecting surface and the second reflecting surface, and an included angle is formed between the first reflecting surface and the second reflecting surface; when the incident light of the light emitter is reflected to the second reflecting surface through the first reflecting surface and then enters the light receiver, the tobacco tar liquid level in the oil storage cavity is lower than the preset liquid level.
In the present invention, the incident light emitted by the light emitter is transmitted to the light receiver by two reflections, and compared with the scheme in embodiment 1 in which an included angle is formed between the light emitter and the light receiver, the light emitter 31 and the light receiver 32 are in a parallel state, so that the light emitter and the light receiver are conveniently connected to the circuit board 33.
Specifically, when the liquid level of the soot in the oil storage cavity is lower than a preset liquid level, the light emitter 31 emits an incident light to the first reflection surface 111a, the first reflection surface 111a reflects the incident light to the second reflection surface 111b and then enters the light receiver 32, and the light receiver 32 receives the light emitted by the light emitter 31 and then generates a low liquid level signal (the low liquid level signal here may be a high level signal or a low level signal, which is determined according to an actual circuit, which is not limited in the present invention);
when the liquid level of the soot in the oil storage cavity is higher than a preset liquid level, the light emitter 31 emits an incident light to the first reflection surface 111a, the incident light enters the oil storage cavity 11, and the light receiver 32 cannot receive the light emitted by the light emitter and then generates a high liquid level signal (the low liquid level signal here may be a low level signal or a high level signal, which is determined according to an actual circuit, and the utility model is not limited);
the low liquid level signal or the high liquid level signal is transmitted to the control module in the base through a wire or an electrode end, and the control module performs corresponding operations (for example, turning on a warning light or stopping the work of an atomizer, etc.) according to the low liquid level signal, which is not limited in the present invention.
It should be noted that the preset liquid level is determined according to an intersection point of the incident light and the first reflecting surface, and the intersection point may be determined according to actual requirements, that is, the intersection point may be set to be higher than the bottom of the oil storage cavity.
Example 3
Referring to fig. 9 to 13, the present invention further provides an oil amount detecting device, which is applied to an electronic cigarette, wherein the electronic cigarette includes a base 2 'and an oil bin 1' having an oil storage chamber, and the oil amount detecting device further includes: the oil bin is also provided with a cavity 12 ', the cavity is positioned on the side of the oil storage cavity, and the bottom of the cavity is provided with a first reflecting surface 121'; a second reflecting surface 111 ' is arranged at the bottom of the oil storage cavity, and an included angle is formed between the second reflecting surface 111 ' and the first reflecting surface 121 '; and the light detection assembly is arranged in the base and used for emitting incident light to the first reflecting surface or the second reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
Compared with the prior art, the liquid level detection of the tobacco tar in the oil storage cavity is innovatively carried out by utilizing the optical detection assembly, so that the phenomenon of cotton burning in different degrees caused by forced use of a user after the tobacco tar is exhausted is avoided; and, the optical detection component sets up in the base, with the electrode tip of optical detection component accomodates in the base, avoid the electrode tip to expose and the damage that leads to.
In one embodiment, the light detection assembly includes a light emitter 31 ', a light receiver 32 ', and a circuit board 33 '; the optical transmitter and the optical receiver are connected to the circuit board.
Furthermore, an accommodating cavity 21 'is formed in the base 2', the optical detection assembly is arranged in the accommodating cavity, and the optical detection assembly is positioned below the oil storage cavity and the cavity; wherein the optical transmitter, the first reflecting surface, the second reflecting surface and the optical receiver are positioned on the same optical path; when the incident light of the light emitter is reflected to the first reflecting surface through the second reflecting surface and then enters the light receiver, or the incident light of the light emitter is reflected to the second reflecting surface through the first reflecting surface and then enters the light receiver, the liquid level of the tobacco tar in the oil storage cavity is lower than a preset liquid level.
According to the utility model, the cavity is additionally arranged in the oil bin, and the first reflecting surface of the cavity is matched with the second reflecting surface in the oil storage cavity, so that the detection of the liquid level of the tobacco tar in the oil storage cavity is realized, the improvement in the oil storage cavity in embodiment 2 is avoided, and the die opening processing is convenient.
Further, a sealing component (such as a rubber plug or a cotton plug) can be added to the upper part of the cavity, so that dust and the like are prevented from entering the cavity and accumulating at the bottom of the cavity, and the detection precision is further influenced.
Specifically, when the liquid level of the soot in the oil storage cavity is lower than a preset liquid level, the light emitter 31 ' emits an incident light to the first reflection surface 121 ', the first reflection surface 121 ' reflects the incident light to the second reflection surface 111 ' and then emits the incident light to the light receiver 32 ', and the light receiver receives the light emitted by the light emitter and then generates a low liquid level signal (the low liquid level signal here may be a high level signal or a low level signal, and is specifically determined according to an actual circuit, which is not limited in the present invention);
when the liquid level of the soot in the oil storage cavity is higher than a preset liquid level, the light emitter 31 'emits an incident light to the first reflection surface 121', the first reflection surface 121 'reflects the incident light to the second reflection surface 111' and then emits the incident light to the oil storage cavity 11 ', and the light receiver 32' cannot receive the light emitted by the light emitter and then generates a high liquid level signal (the low liquid level signal here may be a low level signal or a high level signal, and is specifically determined according to an actual circuit, which is not limited in the present invention);
the low liquid level signal or the high liquid level signal is transmitted to the control module in the base through a wire or an electrode end, and the control module performs corresponding operations (for example, turning on a warning light or stopping the work of an atomizer, etc.) according to the low liquid level signal, which is not limited in the present invention.
It should be noted that the preset liquid level is determined according to an intersection point of the incident light and the second reflecting surface, and the intersection point may be determined according to actual requirements, that is, the intersection point may be set to be higher than the bottom of the oil storage cavity.
It should be noted that the positions of the light receiver and the light reflector may be interchanged, and when the liquid level of the soot in the oil storage cavity is higher than a preset liquid level, the light emitter emits an incident light to the second reflection surface, and the incident light is directly incident into the oil storage cavity.
The utility model also provides an electronic cigarette which comprises the oil quantity detection device. The base with the oil sump is connected, be equipped with control module in the base, control module with light detection component electric connection. The oil bin is powered and controlled by the base, wherein the control module performs corresponding operation (such as turning on a warning lamp or stopping the work of an atomizer) according to the low liquid level signal, which is not limited by the utility model.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. The utility model provides an oil mass detection device, its is applied to in the electron cigarette, the electron cigarette includes base and the oil storage tank that has the oil storage chamber, its characterized in that, this oil mass detection device includes:
the reflecting surface is arranged at the bottom of the oil storage cavity;
and the light detection component is arranged in the base and used for emitting incident light to the reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
2. The oil amount detection device according to claim 1, characterized in that:
the optical detection component comprises an optical transmitter, an optical receiver and a circuit board;
the optical transmitter and the optical receiver are connected to the circuit board.
3. The oil amount detection device according to claim 2, characterized in that:
an accommodating cavity is formed in the base, the light detection assembly is arranged in the accommodating cavity, and the light detection assembly is positioned below the oil storage cavity; wherein the light emitter, the reflection surface and the light receiver are positioned on the same light path;
when the light receiver receives the light emitted by the light emitter, the tobacco tar liquid level in the oil storage cavity is lower than a preset liquid level.
4. The oil amount detection device according to claim 3, characterized in that:
the bottom of the oil bin is provided with a light-transmitting block which is arranged in a protruding manner towards the direction of the accommodating cavity, the light-transmitting block is arranged corresponding to the reflecting surface, and the light-transmitting block is provided with an incident surface and an emergent surface;
the incident ray of the light emitter is vertically arranged relative to the incident plane, and the incident angle of the incident ray is larger than the critical angle;
the light received by the light receiver is vertically arranged relative to the emergent surface.
5. The oil amount detection device according to claim 3, characterized in that:
the reflecting surface comprises a first reflecting surface and a second reflecting surface;
the bottom of the oil storage cavity is provided with a light transmitting block which is arranged in a protruding manner towards the oil storage cavity, the light transmitting block is provided with a first reflecting surface and a second reflecting surface, and an included angle is formed between the first reflecting surface and the second reflecting surface;
when the incident light of the light emitter is reflected to the second reflecting surface by the first reflecting surface and then enters into the second reflecting surface
When the optical receiver is in the optical receiver, the tobacco tar liquid level in the oil storage cavity is lower than a preset liquid level.
6. The utility model provides an oil mass detection device, its is applied to in the electron cigarette, the electron cigarette includes base and the oil storage tank that has the oil storage chamber, its characterized in that, this oil mass detection device includes:
the oil bin is also provided with a cavity, the cavity is positioned on the side of the oil storage cavity, and the bottom of the cavity is provided with a first reflecting surface;
a second reflecting surface is arranged at the bottom of the oil storage cavity, and an included angle is formed between the second reflecting surface and the first reflecting surface;
and the light detection assembly is arranged in the base and used for emitting incident light to the first reflecting surface or the second reflecting surface so as to detect whether the tobacco tar in the oil storage cavity is lower than a preset liquid level or not.
7. The oil amount detection device according to claim 6, characterized in that:
the optical detection component comprises an optical transmitter, an optical receiver and a circuit board;
the optical transmitter and the optical receiver are connected to the circuit board.
8. The oil amount detection device according to claim 7, characterized in that:
an accommodating cavity is formed in the base, the optical detection assembly is arranged in the accommodating cavity and is positioned below the oil storage cavity and the cavity; wherein the optical transmitter, the first reflecting surface, the second reflecting surface and the optical receiver are positioned on the same optical path;
when the incident light of the light emitter is reflected to the first reflecting surface through the second reflecting surface and then enters the light receiver, or the incident light of the light emitter is reflected to the second reflecting surface through the first reflecting surface and then enters the light receiver, the liquid level of the tobacco tar in the oil storage cavity is lower than a preset liquid level.
9. An electronic cigarette characterized by comprising the oil amount detection device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220053208.XU CN216906831U (en) | 2022-01-10 | 2022-01-10 | Electronic cigarette and oil quantity detection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220053208.XU CN216906831U (en) | 2022-01-10 | 2022-01-10 | Electronic cigarette and oil quantity detection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216906831U true CN216906831U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220053208.XU Active CN216906831U (en) | 2022-01-10 | 2022-01-10 | Electronic cigarette and oil quantity detection device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216906831U (en) |
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2022
- 2022-01-10 CN CN202220053208.XU patent/CN216906831U/en active Active
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