CN214341648U - Physical temperature limiting pot - Google Patents
Physical temperature limiting pot Download PDFInfo
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- CN214341648U CN214341648U CN202022186991.0U CN202022186991U CN214341648U CN 214341648 U CN214341648 U CN 214341648U CN 202022186991 U CN202022186991 U CN 202022186991U CN 214341648 U CN214341648 U CN 214341648U
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- magnetic member
- inlayer
- limiting
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- 230000007246 mechanism Effects 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910000828 alnico Inorganic materials 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 238000010411 cooking Methods 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 3
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 3
- 239000005321 cobalt glass Substances 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-nickel-cobalt Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model discloses a physics limit for temperature pan, including inlayer, skin and switch unit, outer movably set up in the periphery of inlayer skin with leave clearance S between the inlayer, switch unit connects respectively the inlayer with it is outer, switch unit can be according to the automatic closure of the size relation of operating temperature and temperature threshold value or disconnection, clearance S is in switch unit is crescent when switching over to the disconnection by the closure. The utility model discloses a physics limit for temperature pan through setting up outer movably in the periphery of inlayer, the switch unit can be according to the automatic closure of the operating temperature of pan and the size relation of temperature threshold value or disconnection to realize the clearance size between automatically regulated skin and the inlayer, and then reach the purpose of cooking the edible material in the inlayer of protection pan and the pan, show promotion pan life-span and user experience.
Description
Technical Field
The utility model relates to a pan technical field especially relates to a physics limit for temperature technique of pan.
Background
The prior art is active in preventing dry burning or overflow, for example, by means of temperature sensitive resistors or ion extinction protection devices, which rely on a system solution of a heating assembly, involving control methods and reliability issues. In practical application, although the effect of preventing dry burning can be achieved, the cookware and the cooked food often cause irreparable loss before reaching the dry burning temperature, such as cookware burning deformation, food material bottom pasting and the like. Therefore, the physical temperature-limiting pot is provided, the control logic of the heating assembly is not relied on, and the pot and the food material are effectively protected, so that the pot has very important value.
Disclosure of Invention
The utility model discloses aim at solving one of the problems that exist among the prior art to a certain extent at least, for this reason, the utility model provides a physics limit for temperature pan, it can be according to the size relation of operating temperature and temperature threshold value, the clearance size between automatically regulated skin and the inlayer to reach the inlayer of protection pan and the purpose of the edible material of culinary art, showing promotion pan life-span and user experience.
According to the physics limit for temperature pan that above-mentioned provided, it realizes through following technical scheme:
the utility model provides a physics limit for temperature pan, includes inlayer, skin and switch element, outer movably set up in the periphery of inlayer skin with leave clearance S between the inlayer, switch element connects respectively the inlayer with it is outer, switch element can be according to the automatic closure of magnitude relation or the disconnection of operating temperature and temperature threshold value, clearance S is in switch element is crescent when switching to the disconnection by the closure.
In some embodiments, the switch unit comprises a first magnetic member and a second magnetic member, the first magnetic member is fixedly connected to the outer side of the bottom of the inner layer, and the second magnetic member is installed on the inner side of the bottom of the outer layer; the first magnetic part can attract the second magnetic part when the working temperature is less than or equal to the temperature threshold, and the first magnetic part and the second magnetic part are separated from attraction when the working temperature is greater than the temperature threshold.
In some embodiments, the first magnetic member is any one of an iron-nickel-cobalt glass seal alloy, an iron-nickel low expansion alloy, an iron-chromium glass seal alloy, and a soft magnetic alloy, and the second magnetic member is any one of an aluminum-nickel-cobalt, SmCo, and soft magnetic alloy5、Sm2(Co,Cu,Zr)17Any one of ferrite and neodymium iron boron.
In some embodiments, a position of the outer layer corresponding to the first magnetic member is provided with a mounting groove recessed downward, the second magnetic member is accommodated in the mounting groove, and when the first magnetic member attracts the second magnetic member, the lower end of the first magnetic member extends into the mounting groove.
In some embodiments, the magnetic component further comprises a positioning module, and the second magnetic component is fixedly installed in the installation groove through the positioning module.
In some embodiments, a thermally conductive layer is disposed within at least a portion of the gap S, the thermally conductive layer being attached to an outer surface of the inner layer or an inner surface of the outer layer.
In some embodiments, the cookware further comprises an elastic mechanism, an upper flange extending outwards is arranged on the upper edge of the inner layer, a lower flange extending outwards is arranged at a position, corresponding to the upper flange, of the upper edge of the outer layer, the lower flange and the upper flange jointly form a handle of the cookware, and the elastic mechanism is arranged between the upper flange and the lower flange.
In some embodiments, the elastic mechanism comprises an elastic piece, the lower flange is provided with a downward concave accommodating groove, the lower end of the elastic piece is arranged in the accommodating groove and connected or abutted with the bottom of the accommodating groove, and the upper end of the elastic piece is connected or abutted with the upper flange; or the upper flanging is provided with a limiting groove protruding upwards, the upper end of the elastic piece extends into the limiting groove and is abutted or connected with the top of the limiting groove, and the lower end of the elastic piece is connected or abutted with the lower flanging.
In some embodiments, the elastic mechanism further includes a positioning column, the upper end of the positioning column is connected to the upper flange, the lower end of the positioning column extends into the accommodating groove, and the elastic member is sleeved on the outer surface of the positioning column.
In some embodiments, the elastic mechanism further includes a limiting block, the limiting block is disposed at a position where the bottom of the upper flange corresponds to the accommodating groove, and the upper end of the elastic member abuts against or is connected to the bottom of the limiting block.
Compared with the prior art, the utility model discloses an at least including following beneficial effect:
the utility model discloses a physics limit for temperature pan through setting up outer movably in the periphery of inlayer, the switch unit can be according to the automatic closure of the operating temperature of pan and the size relation of temperature threshold value or disconnection to realize the clearance size between automatically regulated skin and the inlayer, and then reach the purpose of cooking the edible material in the inlayer of protection pan and the pan, show promotion pan life-span and user experience.
Drawings
Fig. 1 is a schematic structural view of a pot in embodiment 1 of the present invention, in which a switch unit is in a closed state;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a schematic structural view of the pot in embodiment 1 of the present invention, in which the switch unit is in an off state.
Detailed Description
The present invention is illustrated by the following examples, but the present invention is not limited to these examples. To the embodiment of the present invention, modify or replace some technical features, without departing from the spirit of the present invention, it should be covered in the technical solution scope of the present invention.
Example 1
Referring to fig. 1-3, the present embodiment provides a physical temperature limiting pot comprising an inner layer 1, an outer layer 2 and a switch unit (not shown in the figure), wherein the inner layer 1 is a heat conducting layer. The outer layer 2 is a heating or heat transfer layer, and the outer layer 2 is movably arranged on the periphery of the inner layer 1. A gap S is reserved between the outer layer 2 and the inner layer 1, and the size of the gap S can be changed along with the movement of the outer layer 2. The switch unit is connected with the inner layer 1 and the outer layer 2 respectively, the switch unit can be automatically closed or opened according to the size relation between the working temperature and the temperature threshold value, and the gap S is gradually increased when the switch unit is switched from closed to opened. In this embodiment, the operating temperature is the temperature of the inner layer 1 or the outer layer 2 during cooking, and the temperature threshold is the upper limit value of the temperature at which the switch unit is kept in the closed state.
Referring to fig. 1, when the switch unit is kept in a closed state when the working temperature of the pot is less than or equal to the temperature threshold, the gap S between the outer layer 2 and the inner layer 1 is minimum, and the heat of the outer layer 2 can be quickly transferred to the inner layer 1, so that the inner layer 1, i.e. the cooked food inside the pot, is heated, and the heating effect is ensured; referring to fig. 3, when the operating temperature of pan was greater than the temperature threshold, the switch unit can automatic switch to the off-state, and clearance S between outer 2 and the inlayer 1 grow this moment for outer 2' S heat is difficult to transmit to inlayer 1, has reached thermal-insulated purpose, has effectively protected the inlayer 1 of pan and the culinary art food in the pan.
It is thus clear that the physics limit for temperature pan of this embodiment through with outer 2 movably sets up in inlayer 1' S periphery to the switch unit can be according to the operating temperature of pan and the automatic closure of the big or small relation of temperature threshold value or disconnection, thereby realizes the clearance S size between automatically regulated outer 2 and the inlayer 1, and then reaches the purpose of cooking the edible material in inlayer 1 and the pan of protection pan, is showing promotion pan life-span and user experience.
Referring to fig. 1 and 3, further, the switch unit includes a first magnetic member 31 and a second magnetic member 32, the first magnetic member 31 is fixedly connected to the outer side of the bottom of the inner layer 1, and the second magnetic member 32 is installed at the inner side of the bottom of the outer layer 2. The first magnetic part 31 can attract the second magnetic part 32 when the working temperature is less than or equal to the temperature threshold, and the switch unit is closed at the moment, so that the gap S between the outer layer 2 and the inner layer 1 is minimum, and the heat conduction effect between the inner layer 1 and the outer layer 2 is ensured; the first magnetic part 31 and the second magnetic part 32 are released from the attraction relation when the working temperature is higher than the temperature threshold value, the switch unit is turned off at the moment, the outer layer 2 and the second magnetic part 32 move towards the direction far away from the inner layer 1, so that the gap S between the outer layer 2 and the inner layer 1 is enlarged, the heat of the outer layer 2 is prevented from being transferred to the inner layer 1, the heat insulation effect is obviously improved, and the purpose of protecting a cooker and cooking food materials is achieved.
In this embodiment, the curie temperature of the first magnetic member 31 is preferably 150 to 950 ℃, and more preferably 180 to 450 ℃. Specifically, the first magnetic member 31 is any one of an iron-nickel-cobalt glass sealing alloy, an iron-nickel low expansion alloy, an iron-chromium glass sealing alloy, and a soft magnetic alloy. More specifically, the iron-nickel-cobalt glass seal alloy is 4J29 or 4J44, the iron-nickel glass seal alloy is any one of 4J42, 4J48, 4J50 and 4J52, the iron-nickel low expansion alloy is 4J36 or 4J32, the iron-chromium glass seal alloy is 4J28, and the soft magnetic alloy is any one of 1J36, 1J46, 1J50, 1J79, 1J85 and 1J 22.
The Curie temperature of the second magnetic member 32 is not less than 310 deg.C, the maximum service temperature is not less than 150 deg.C, and the second magnetic member 32 is Alnico or SmCo5、Sm2(Co,Cu,Zr)17Any one of ferrite and neodymium iron boron. In the present embodiment, the second magnetic member 32 is preferably alnico, which has a curie temperature point of 750 to 890 ℃ and a maximum use temperature of 525 ℃.
Referring to fig. 1, specifically, a position of the bottom of the outer layer 2 corresponding to the first magnetic member 31 is provided with a mounting groove 21 recessed downward, the second magnetic member 32 is accommodated in the mounting groove 21, and when the first magnetic member 31 attracts the second magnetic member 32, the lower end of the first magnetic member 31 extends into the mounting groove 21. Therefore, the first magnetic part 31 attracts the second magnetic part 32, that is, when the switch unit is closed, the gap S between the inner layer 1 and the outer layer 2 is further reduced, the heat conduction effect between the inner layer 1 and the outer layer 2 is further enhanced, and the heating efficiency of the pot is remarkably improved.
Referring to fig. 3, further, the magnetic connector further includes a positioning module 4, and the second magnetic member 32 is fixedly installed in the installation groove 21 through the positioning module 4, so that with the aid of the positioning module 4, the second magnetic member 32 is stably and reliably fixed in the installation groove 21, and the firmness and reliability of connection between the second magnetic member 32 and the outer layer 2 are improved.
Further, be equipped with heat-conducting layer 5 in at least partial clearance S, heat-conducting layer 5 can be high heat conduction metal coating, and its connection is at the surface of inlayer 1 or the internal surface of outer 2, like this, through heat-conducting layer 5, has effectively guaranteed the pan good even heat conduction effect when the heating, promotes the efficiency of inlayer 1 heating culinary art food. Preferably, the thermally conductive metal coating is made of a copper or aluminum material.
Referring to fig. 2-3, specifically, the upper edge of the inner layer 1 is provided with an upper flange 11 extending outwards, the upper edge of the outer layer 2 is provided with a lower flange 22 extending outwards at a position corresponding to the upper flange 11, and the lower flange 22 and the upper flange 11 together form a handle of a pot, so that a user can conveniently take and place the pot, the user is prevented from being scalded when moving the pot in a cooking process or after the cooking is finished, and the use safety is improved.
In this embodiment, the relative both sides on 1 upper end edge in inlayer all are equipped with the last turn-ups 11 that extends outwards, correspond, and the relative both sides on 2 outer upper end edges all are equipped with the lower turn-ups 22 that extends outwards for the pan left and right sides all has the handle, and the user takes and puts the pan conveniently steadily more.
Referring to fig. 2-3, further, an elastic mechanism (not shown) is further included, an elastic mechanism located between the upper flange 11 and the lower flange 22 is disposed inside each handle, and when the first magnetic member 31 attracts the second magnetic member 32, a pretightening force generated by the elastic mechanism is smaller than an attracting force generated when the first magnetic member 31 attracts the second magnetic member 32. In the cooking process, when the working temperature rises to be close to the temperature threshold value, the attraction force is gradually reduced, when the attraction force is reduced to be smaller than the pretightening force of the elastic mechanism, the pretightening force of the elastic mechanism can push the outer layer 2 to move towards the direction far away from the inner layer 1, and the movement of the outer layer 2 can synchronously drive the second magnetic part 32 to move towards the direction far away from the inner layer 1 and the first magnetic part 31, so that the speed of the switch unit disconnection (namely, the attraction relation between the first magnetic part 31 and the second magnetic part 32 is removed) is accelerated, the response of the switch unit disconnection is more sensitive, and the effect of protecting a cooker and cooking food materials is obviously enhanced. In addition, under the combined action of the two elastic mechanisms, the downward movement of the outer layer 2 is more stable.
Specifically, the elastic mechanism includes an elastic member 61, the lower flange 22 is provided with a receiving groove 23 recessed downward, the elastic member 61 is a spring, the lower end of the elastic member is disposed in the receiving groove 23 and connected or abutted to the bottom of the receiving groove 23, and the upper end of the elastic member is connected or abutted to the upper flange 11. Therefore, by arranging the accommodating groove 23 suitable for accommodating the elastic element 61, when the first magnetic element 31 attracts the second magnetic element 32, the distance between the upper flange 11 and the lower flange 22 is ensured to be smaller, the gap S between the outer layer 2 and the inner layer 1 is further ensured to be smaller, and the heat transfer effect between the inner layer 1 and the outer layer 2 is obviously improved; meanwhile, the elastic member 61 is in a compressed state (see fig. 2), and the pretightening force of the elastic member 61 is smaller than the attraction force when the first magnetic member 31 attracts the second magnetic member 32.
In other embodiments, the receiving groove 23 of the lower flange 22 may be omitted, and correspondingly, the upper flange 11 is provided with a limiting groove protruding upward, the upper end of the elastic member 61 extends into the limiting groove and abuts against or is connected to the top of the limiting groove, and the lower end of the elastic member is connected with or abuts against the lower flange 22.
Specifically, elastic mechanism still includes reference column 62, and upward turn-ups 11 is connected to the upper end of reference column 62, and the holding tank 23 the inside is stretched into to the lower extreme, and the surface of reference column 62 is located to elastic component 61 cover, and like this, reference column 62 can play the guide effect to elastic component 61, avoids elastic component 61 concertina movement process to take place to shift and deformation, guarantees elastic component 61's performance. In the embodiment, the upper flange 11 is provided with a through hole (not shown) at a position corresponding to the positioning column 62, the lower end of the positioning column 62 passes through the elastic member 61 and then connects to the bottom of the receiving groove 23, and the upper end passes through the through hole and extends to above the through hole.
More specifically, the elastic mechanism further comprises a limiting block 63, the limiting block 63 is sleeved on the outer surface of the positioning column 62, the top surface of the limiting block 63 is connected with or abutted against the bottom of the upper flanging 11, and the bottom surface of the limiting block 63 is connected with or abutted against the upper end of the elastic member 61, so that the strength of the upper flanging 11 can be improved through the limiting block 63, and the deformation of the upper flanging 11 under the action of the pretightening force of the elastic member 61 is avoided.
Example 2
The present embodiment is different from embodiment 1 in that the elastic mechanism is omitted, the receiving groove 23 as described in embodiment 1 is correspondingly omitted from the lower flange 22, and other parts are the same as those in embodiment 1. From this, the overall structure of pan is simpler, saves manufacturing material and assembly process for manufacturing cost is lower.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (10)
1. The utility model provides a physics limit for temperature pan, its characterized in that includes inlayer (1), skin (2) and switch element, skin (2) movably set up in the periphery of inlayer (1) skin (2) with leave clearance S between inlayer (1), switch element connects respectively inlayer (1) with outer layer (2), switch element can be according to the automatic closure of magnitude relation of operating temperature and temperature threshold value or disconnection, clearance S is in switch element increases gradually when switching to the disconnection by the closure.
2. A physical temperature limiting pot according to claim 1, characterized in that the switch unit comprises a first magnetic member (31) and a second magnetic member (32), the first magnetic member (31) is fixedly connected to the bottom outside of the inner layer (1), the second magnetic member (32) is installed to the bottom inside of the outer layer (2); the first magnetic part (31) can attract the second magnetic part (32) when the working temperature is smaller than or equal to the temperature threshold value, and the first magnetic part (31) and the second magnetic part (32) are separated from attracting relation when the working temperature is larger than the temperature threshold value.
3. A physical temperature-limiting pot as claimed in claim 2, wherein the first magnetic member (31) is any one of fe-ni-co glass-seal alloy, fe-ni-glass-seal alloy, fe-ni low expansion alloy, fe-cr glass-seal alloy and soft magnetic alloy, and the second magnetic member (32) is alnico, SmCo, and soft magnetic alloy5、Sm2(Co,Cu,Zr)17Any one of ferrite and neodymium iron boron。
4. The pot as claimed in claim 2, wherein the outer layer (2) has a downwardly concave mounting groove (21) at a position corresponding to the first magnetic member (31), the second magnetic member (32) is received in the mounting groove (21), and when the first magnetic member (31) attracts the second magnetic member (32), the lower end of the first magnetic member (31) extends into the mounting groove (21).
5. The physical temperature-limiting pot as claimed in claim 4, further comprising a positioning module (4), wherein the second magnetic member (32) is fixedly mounted in the mounting groove (21) through the positioning module (4).
6. A physical temperature-limiting pot according to claim 1, characterized in that a heat conducting layer (5) is arranged in at least part of the space S, said heat conducting layer (5) being attached to the outer surface of the inner layer (1) or the inner surface of the outer layer (2).
7. The physical temperature-limiting pot as claimed in any one of claims 1 to 6, further comprising an elastic mechanism, wherein an upper flange (11) extending outwards is provided along the upper end of the inner layer (1), a lower flange (22) extending outwards is provided along the upper end of the outer layer (2) at a position corresponding to the upper flange (11), the lower flange (22) and the upper flange (11) jointly constitute a handle of the pot, and the elastic mechanism is provided between the upper flange (11) and the lower flange (22).
8. The physical temperature-limiting pot as claimed in claim 7, wherein the elastic mechanism comprises an elastic member (61), the lower flange (22) is provided with a receiving groove (23) which is concave downwards, the lower end of the elastic member (61) is arranged in the receiving groove (23) and connected or abutted with the bottom of the receiving groove (23), and the upper end of the elastic member is connected or abutted with the upper flange (11);
or the upper flanging (11) is provided with a limiting groove protruding upwards, the upper end of the elastic piece (61) extends into the limiting groove and is abutted or connected with the top of the limiting groove, and the lower end of the elastic piece is connected or abutted with the lower flanging (22).
9. The physical temperature-limiting cooker as claimed in claim 8, wherein the elastic mechanism further comprises a positioning column (62), the upper end of the positioning column (62) is connected with the upper flange (11), the lower end of the positioning column extends into the accommodating groove (23), and the elastic member (61) is sleeved on the outer surface of the positioning column (62).
10. The physical temperature-limiting pot as claimed in claim 8, wherein the elastic mechanism further comprises a limiting block (63), the limiting block (63) is arranged at the position of the bottom of the upturned edge (11) corresponding to the accommodating groove (23), and the upper end of the elastic member (61) is abutted against or connected with the bottom of the limiting block (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022186991.0U CN214341648U (en) | 2020-09-29 | 2020-09-29 | Physical temperature limiting pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022186991.0U CN214341648U (en) | 2020-09-29 | 2020-09-29 | Physical temperature limiting pot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214341648U true CN214341648U (en) | 2021-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022186991.0U Active CN214341648U (en) | 2020-09-29 | 2020-09-29 | Physical temperature limiting pot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214341648U (en) |
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2020
- 2020-09-29 CN CN202022186991.0U patent/CN214341648U/en active Active
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