CN217013465U - Double-pressure-relief type cup cover structure and electric heating cup with same - Google Patents
Double-pressure-relief type cup cover structure and electric heating cup with same Download PDFInfo
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- CN217013465U CN217013465U CN202122862627.6U CN202122862627U CN217013465U CN 217013465 U CN217013465 U CN 217013465U CN 202122862627 U CN202122862627 U CN 202122862627U CN 217013465 U CN217013465 U CN 217013465U
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Abstract
The utility model discloses a double-pressure-relief type cup cover structure and an electric heating cup with the same, wherein the cup cover structure covers a cup body, and comprises a cup cover body, a pressure relief seat arranged in a cup cover, an elastic pressure relief valve arranged on the pressure relief seat and a breathable film arranged on the elastic pressure relief valve; the breathable film is communicated with the external environment; when the air pressure in the electric heating water cup is smaller than or equal to the pressure relief threshold value, the elastic pressure relief valve is in a closed state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane; when the air pressure in the electric heating water cup is larger than the pressure relief threshold value, the elastic pressure relief valve is in an open state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane and the elastic pressure relief valve; the ventilating film is arranged for pressure relief, so that the cup cover structure does not need to be taken down when water is heated and boiled, and the elastic pressure relief valve is utilized for opening for pressure relief when the air pressure is high, so that the balance of the air pressure inside and outside the electric heating cup can be quickly kept, the structure is safer and more reliable to use, and the practicability is higher.
Description
Technical Field
The utility model relates to a double-pressure-relief type cup cover structure and an electric heating cup with the same.
Background
The electric heating cup has become a household appliance frequently used by people in outgoing or traveling due to the characteristics of simple use, convenient carrying and the like.
However, when the existing electric heating water cup is used for heating and boiling water, the cup cover needs to be unscrewed and taken down firstly, so that steam in the cup is discharged to the external environment in time, and the cup cover is opened, so that boiling water is easy to spill to cause scalding risks when the water is boiled, and therefore, certain safety problems exist in the actual use process of the existing electric heating water cup.
Disclosure of Invention
The utility model aims to overcome the defects and provides a double-pressure-relief type cup cover structure and an electric heating cup with the same.
In order to achieve the purpose, the utility model adopts the following specific scheme:
the double-pressure-relief type cup cover structure is applied to the electric heating water cup and comprises a cup cover body, a pressure relief seat arranged in the cup cover, an elastic pressure relief valve arranged on the pressure relief seat and a breathable film arranged on the elastic pressure relief valve; the breathable film is communicated with the external environment;
when the air pressure in the electric heating water cup is smaller than or equal to the pressure relief threshold value, the elastic pressure relief valve is in a closed state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane; when the air pressure in the electric heating water cup is larger than the pressure relief threshold value, the elastic pressure relief valve is in an open state, and the electric heating water cup is subjected to pressure relief through the air-permeable membrane and the elastic pressure relief valve.
The elastic pressure release valve comprises a pressure release silica gel ring, a pressure release support and a pressure release spring, the cup cover body is provided with a plurality of first ventilation through holes, the pressure release seat is provided with a first central through hole, the pressure release silica gel ring is embedded in the pressure release seat in a sealing mode and is coaxially arranged with the first central through hole, the pressure release support is embedded on the inner wall of the pressure release silica gel ring, the pressure release support is provided with a plurality of second ventilation through holes, the ventilation film is arranged on the pressure release support, the pressure release spring is arranged in the cup cover body, and two ends of the pressure release spring are respectively abutted to the inner top surface of the cup cover body and the upper top surface of the pressure release support.
Furthermore, the inner peripheral wall of the first central through hole is convexly provided with a first convex ring, the lower end face of the pressure release silica gel ring is in sealing abutting joint with the upper end face of the first convex ring, and the outer peripheral wall of the pressure release silica gel ring is in clearance fit with the inner peripheral wall of the first central through hole.
Furthermore, a plurality of convex ridges are uniformly distributed on the inner wall of the first central through hole along the circumferential direction, and the convex ridges are abutted with the outer circumferential wall of the pressure release silica gel ring.
The pressure relief support comprises a circular ring part and a circular plate part which are integrally formed, a first annular groove is formed in the inner wall of the pressure relief silica gel ring, the circular ring part is embedded in the first annular groove, the peripheral wall of the circular plate part is connected to the inner peripheral wall of the circular ring part, a plurality of second ventilation through holes are uniformly distributed in the circular plate part, and the ventilation film is arranged on the bottom surface of the circular plate part.
Furthermore, the center of the circular plate part is provided with a first positioning part in an upward protruding manner, the outer wall of the first positioning part is uniformly provided with a plurality of first positioning blades which are arranged in an outward protruding manner along the circumferential direction, the center of the first positioning part is provided with a second central through hole, the first positioning blades and the second ventilation through holes are sequentially and alternately arranged, and the outer side wall of each first positioning blade is abutted against the inner wall of the pressure relief spring;
the cup cover comprises a cup cover body and is characterized in that a second positioning portion is arranged on the inner top of the cup cover body in a downward protruding mode, a plurality of second positioning blades protruding outwards are evenly distributed on the outer wall of the second positioning portion in the circumferential direction, a third central through hole is formed in the center of the first positioning portion, the second positioning blades and the first ventilation through holes are sequentially and alternately arranged, and the outer side wall of each second positioning blade is abutted to the inner wall of the pressure relief spring.
Furthermore, a second annular groove is formed in the top of the pressure relief base, a second convex ring is convexly arranged on the inner top of the cup cover body, a sealing ring is embedded in the second annular groove, and the second convex ring is embedded in the second annular groove and is abutted to the sealing ring.
Furthermore, the pressure relief seat is sleeved with a net cover cap for protecting the breathable film.
Furthermore, a sealing rubber pad is sleeved on the outer wall of the pressure relief base, the outer wall of the sealing rubber pad is in interference fit with the inner wall of the cup cover body, and the outer peripheral wall of the net cover cap is abutted against the inner peripheral wall of the sealing rubber pad.
The utility model also provides an electric heating water cup which comprises a cup body and the cup cover structure, wherein the cup cover structure is covered on the top end of the cup body.
The utility model has the beneficial effects that: the ventilating film is arranged for pressure relief, so that the cup cover structure does not need to be taken down when water is heated and boiled, and the elastic pressure relief valve is utilized for opening for pressure relief when the air pressure is high, so that the balance of the air pressure inside and outside the electric heating cup can be quickly kept, the structure is safer and more reliable to use, and the practicability is higher.
Drawings
FIG. 1 is a sectional view of an electric heating cup according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the lid structure in accordance with the present invention;
FIG. 3 is another cross-sectional view of the lid structure provided by the embodiments of the present invention;
FIG. 4 is an exploded view of the lid structure according to an embodiment of the present disclosure;
FIG. 5 is a schematic cross-sectional view of an elastic relief valve provided in an embodiment of the present invention;
description of the reference numerals: 1. a cup cover body; 11. a first ventilation through hole; 12. a second positioning portion; 13. a second convex ring; 2. a pressure relief seat; 21. a first central through hole; 22. a first convex ring; 23. convex edges; 24. a second annular groove; 3. an elastic pressure relief valve; 31. a pressure relief silica gel ring; 32. a pressure relief support; 321. a circular ring part; 322. a circular plate portion; 323. a second vent through hole; 324. a first positioning portion; 33. a pressure relief spring; 4. a gas permeable membrane; 5. a seal ring; 6. a mesh cover lid; 7. sealing the rubber gasket; 10. a cup body.
Detailed Description
The utility model will be described in further detail with reference to the following figures and specific examples, without limiting the scope of the utility model.
As shown in fig. 1 to 5, the present embodiment provides an electric heating cup, which includes a cup body 10 and a cup cover structure, wherein the cup cover structure covers the top end of the cup body 10, and the cup cover structure includes a cup cover body 1, a pressure relief seat 2 disposed in the cup cover, an elastic pressure relief valve 3 disposed on the pressure relief seat 2, and a gas permeable membrane 4 disposed on the elastic pressure relief valve 3; the breathable film 4 is communicated with the external environment;
when the air pressure in the electric heating water cup is less than or equal to the pressure relief threshold value, the elastic pressure relief valve 3 is in a closed state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane 4; when the air pressure in the electric heating water cup is larger than the pressure relief threshold value, the elastic pressure relief valve 3 is in an open state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane 4 and the elastic pressure relief valve 3.
Specifically, when water in the cup body 10 is heated, steam in the cup body 10 is gradually increased, air pressure is gradually increased, in the initial heating stage, namely the air pressure in the cup body 10 is smaller than or equal to a pressure relief threshold value, the elastic pressure relief valve 3 is in a closed state, the air permeability and waterproof characteristics of the air permeable membrane 4 are utilized at the moment, the cup cover structure is not required to be unscrewed from the cup body 10, meanwhile, even if the electric heating cup is accidentally toppled in the heating process, the air permeable membrane 4 can also prevent water in the cup body 10 from flowing out, the steam in the cup body 10 is discharged into the external environment through the air permeable membrane 4, along with the increase of the air pressure in the cup body 10, namely when the air pressure in the cup body 10 is larger than the pressure relief threshold value, at the moment, the elastic pressure relief valve 3 drives the air permeable membrane 4 to open another pressure relief channel, at the moment, most of the gas in the cup body 10 is discharged into the external environment through the channel opened by the elastic pressure relief valve 3, and the other part of gas continues to be discharged to the external environment through the breathable film 4 to form double pressure relief, so that the steam in the cup body 10 is rapidly discharged to the external environment, the balance of the internal and external air pressures of the cup body 10 is rapidly realized, and the cup cover structure is not required to be taken down from the cup body 10 in the whole heating process.
It should be noted that the pressure relief threshold is the opening threshold of the elastic pressure relief valve 3, and the opening threshold is adapted to the air pressure value in the cup 10 when the cup lid structure can be normally opened, and the numerical value of the opening threshold is changed according to the numerical values such as the size and the shape of the cup 10, and certainly, in order to avoid causing the damage of the air permeable membrane 4, the pressure relief threshold can be designed to be slightly smaller than the air pressure value in the cup 10 when the cup lid is normally opened, so that the opening threshold can be freely set according to the actual design requirements.
This embodiment carries out the pressure release through setting up ventilated membrane 4 to need not to take off the bowl cover structure when heating and boiling water, utilize elasticity relief valve 3 to open the pressure release when atmospheric pressure simultaneously, thereby can keep the inside and outside atmospheric pressure's of electric heat drinking cup balance fast, the structure uses safe and reliable more, and the practicality is stronger.
As shown in fig. 1 to 5, based on the above-mentioned embodiment, further, the elastic pressure relief valve 3 includes a pressure relief silicone ring 31, a pressure relief support 32 and a pressure relief spring 33, the cup lid 1 is provided with a plurality of first ventilation through holes 11, the pressure relief support 2 has a first central through hole 21, the pressure relief silicone ring 31 is embedded in the pressure relief support 2 in a sealing manner and is coaxially disposed with the first central through hole 21, the pressure relief support 32 is embedded on an inner wall of the pressure relief silicone ring 31, the pressure relief support 32 is provided with a plurality of second ventilation through holes 323, the ventilation film 4 is disposed on the pressure relief support 32, the pressure relief spring 33 is disposed in the cup lid 1, and two ends of the pressure relief spring 33 are respectively abutted to an inner top surface of the cup lid 1 and an upper top surface of the pressure relief support 32.
Specifically, the pressure relief silicone ring 31 is made of a silicone material, the pressure relief spring 33 is made of a stainless steel material and is not easy to corrode, the pressure relief support 32 and the pressure relief support 2 are both made of a PP material, when the air pressure in the cup body 10 is less than or equal to a pressure relief threshold value, steam in the cup body 10 enters the first central through hole 21 and then is exhausted to the external environment through the breathable film 4, the second breathable through hole 323 and the first breathable through hole 11 in sequence, so that the cup cover structure does not need to be taken down for heating, when the air pressure in the cup body 10 is greater than the pressure relief threshold value, because the air pressure in the cup body 10 is high, the pressure relief support 32 is lifted by the steam, the pressure relief support 32 drives the pressure relief silicone ring 31 and the breathable film 4 to move upwards, the pressure relief spring 33 is compressed, so that the first central through hole 21 is directly communicated with the first breathable through hole 11, most of the steam in the cup body 10 is directly exhausted to the first breathable through hole 21 to the first breathable through hole 11, discharge to the external environment from first ventilative through-hole 11 again, another part steam passes through ventilated membrane 4 simultaneously, second ventilative through-hole 323, first ventilative through-hole 11 discharges to the external environment in, thereby realize the steam in the cup 10 and discharge fast, so set up, utilize first central through-hole 21 directly to exhaust, the exhaust aperture is big, the pressure release is fast, so that pressure release spring 33 resets, reset pressure release silica gel ring 31, make pressure release silica gel ring 31 close first central through-hole 21 once more after the pressure release in the cup 10, resume once more in the cup 10 to carrying out the pressure release through ventilated membrane 4, do benefit to and shorten the time that elasticity relief valve 3 opened, thereby effectively avoid elasticity relief valve 3 open time overlength and cause the risk that boiling water in the cup 10 directly spills through first central through-hole 21, the structure uses more safe and reliable.
Based on the above embodiment, further, the first protruding ring 22 is protruded from the inner peripheral wall of the first central through hole 21, the lower end surface of the pressure release silicone ring 31 is in sealing contact with the upper end surface of the first protruding ring 22, and the outer peripheral wall of the pressure release silicone ring 31 is in clearance fit with the inner peripheral wall of the first central through hole 21. So set up to install pressure release silica gel ring 31 in first central through hole 21, do benefit to the volume that reduces overall structure, when pressure release silica gel ring 31 was jacked, the terminal surface of pressure release silica gel ring 31 and first bulge loop 22's terminal surface break away from the cooperation, make first bulge loop 22's centre bore and 11 intercommunications of first ventilative through hole, thereby discharge steam in a large number.
Based on the above embodiment, furthermore, a plurality of protruding ridges 23 are evenly distributed on the inner wall of the first central through hole 21 along the circumferential direction, and the plurality of protruding ridges 23 are all abutted against the outer circumferential wall of the pressure release silica gel ring 31. So set up to the terminal surface of pressure release silica gel ring 31 breaks away from the cooperation back with the terminal surface of first bulge loop 22, can provide bigger exhaust space.
Based on the above embodiment, further, the pressure relief support 32 includes the annular portion 321 and the circular plate portion 322 that are integrally formed, the first annular groove is opened on the inner wall of the pressure relief silicone ring 31, the annular portion 321 is embedded in the first annular groove, the circumferential wall of the circular plate portion 322 is connected to the inner circumferential wall of the annular portion 321, the plurality of second ventilation through holes 323 are uniformly distributed on the circular plate portion 322, and the ventilation film 4 is disposed on the bottom surface of the circular plate portion 322. Specifically, the number of the second ventilation through holes 323 is set to three, and certainly, the number can be freely set according to actual design requirements, the three second ventilation through holes 323 are arranged in a circumferential array, and the second ventilation through holes 323 are arranged in an arc shape, so that the steam in the cup body 10 can be discharged to the first ventilation through holes 11 from each second ventilation through hole 323 after passing through the ventilation film 4.
Based on the above embodiment, further, the center of the circular plate 322 is provided with a first positioning portion 324 protruding upwards, the outer wall of the first positioning portion 324 is uniformly provided with a plurality of first positioning blades protruding outwards along the circumferential direction, the center of the first positioning portion 324 is provided with a second central through hole, specifically, the second central through hole is further communicated with the external environment, the first positioning blades and the second ventilation through holes 323 are sequentially and alternately arranged, and the outer side wall of the first positioning blade abuts against the inner wall of the pressure relief spring 33;
the second positioning portion 12 is convexly provided downwards at the inner top of the cup cover body 1, a plurality of second positioning blades which are convexly provided outwards are evenly distributed on the outer wall of the second positioning portion 12 along the circumferential direction, a third central through hole is provided at the center of the first positioning portion 324, the second positioning blades and the first ventilation through holes 11 are alternately arranged in sequence, and the outer side walls of the second positioning blades are abutted against the inner walls of the pressure relief springs 33.
Specifically, the quantity of first location blade sets up to three, and the quantity of second location blade is six, so sets up, utilizes first location blade and second location blade to fix and lead pressure release spring 33, guarantees that pressure release spring 33 is on a parallel with the axis direction of first central through hole 21 to the elasticity of pressure release support 32, guarantees reliable opening and closing of elasticity relief valve 3.
In this embodiment, every first location blade and every second location blade all are equipped with the chamfer structure, so set up, are convenient for install pressure release spring 33.
Based on the above embodiment, furthermore, the top of the pressure relief base 2 is provided with a second annular groove 24, the inner top of the cup cover body 1 is convexly provided with a second convex ring 13, the second annular groove 24 is embedded with the sealing ring 5, and the second convex ring 13 is embedded in the second annular groove 24 and is abutted against the sealing ring 5. So set up, guarantee the leakproofness between pressure release seat 2 and the bowl cover body 1, avoid the water in the cup 10 to ooze from the gap between pressure release seat 2 and the bowl cover body 1, the structure is more reliable.
Based on the above embodiment, a cover lid 6 for protecting the breathable film 4 is further sleeved on the pressure relief base 2. So set up to include the ventilated membrane 4, the phenomenon of stabbing the ventilated membrane 4 appears in avoiding the use to take place, and the structure is used more reliably, safely.
In this embodiment, an annular protrusion is convexly disposed on the outer peripheral wall of the pressure relief seat 2, a third annular groove is correspondingly concavely disposed on the inner peripheral wall of the net cover lid 6, and the annular protrusion is embedded in the third annular groove. So set up, the cooperation of annular bulge and third annular groove for the reticle cap lid 6 is installed on pressure release seat 2, protects ventilated membrane 4, and is safe convenient.
On the basis of above-mentioned embodiment, further, the outer wall cover of pressure release seat 2 is equipped with a sealed cushion 7, the outer wall of sealed cushion 7 and the inner wall interference fit of bowl cover body 1, and the periphery wall of screen cover lid 6 still leans on with the interior perisporium of sealed cushion 7 counterbalance. So set up to in the installation of the seat of releasing 2, further guarantee simultaneously to release the leakproofness between seat 2 and the bowl cover body 1, form double seal effect with sealing washer 5, effectively avoided the emergence of the infiltration condition.
The above description is only a preferred embodiment of the present invention, and therefore, all equivalent changes or modifications of the structure, characteristics and principles described in the present patent application are included in the protection scope of the present patent application.
Claims (10)
1. The double-pressure-release type cup cover structure is applied to an electric heating cup and is characterized by comprising a cup cover body (1), a pressure-release seat (2) arranged in the cup cover, an elastic pressure-release valve (3) arranged on the pressure-release seat (2) and a breathable film (4) arranged on the elastic pressure-release valve (3), wherein the size of the breathable film (4) is smaller than that of the elastic pressure-release valve (3); the breathable film (4) is communicated with the external environment;
when the air pressure in the electric heating water cup is smaller than or equal to the pressure relief threshold value, the elastic pressure relief valve (3) is in a closed state, and the electric heating water cup is subjected to pressure relief through the air permeable membrane (4); when the air pressure in the electric heating water cup is larger than the pressure relief threshold value, the elastic pressure relief valve (3) is in an open state, and the electric heating water cup is subjected to pressure relief through the breathable film (4) and the elastic pressure relief valve (3).
2. The cup cover structure with double pressure relief according to claim 1, wherein the elastic pressure relief valve (3) comprises a pressure relief silicone ring (31), a pressure relief support (32) and a pressure relief spring (33), the cup cover body (1) is provided with a plurality of first ventilation through holes (11), the pressure relief base (2) is provided with a first central through hole (21), the pressure relief silica gel ring (31) is hermetically embedded in the pressure relief seat (2) and is coaxial with the first central through hole (21), the pressure relief support (32) is embedded on the inner wall of the pressure relief silica gel ring (31), the pressure relief support (32) is provided with a plurality of second ventilation through holes (323), the ventilation film (4) is arranged on the pressure relief support (32), the pressure relief spring (33) is arranged in the cup cover body (1), and the two ends of the pressure relief spring (33) are respectively abutted against the inner top surface of the cup cover body (1) and the upper top surface of the pressure relief support (32).
3. The cup cover structure with the double pressure release functions as claimed in claim 2, wherein a first convex ring (22) is convexly arranged on the inner peripheral wall of the first central through hole (21), the lower end face of the pressure release silicone ring (31) is in sealing abutting connection with the upper end face of the first convex ring (22), and the outer peripheral wall of the pressure release silicone ring (31) is in clearance fit with the inner peripheral wall of the first central through hole (21).
4. The cup cover structure with the double pressure relief functions as claimed in claim 2, wherein a plurality of protruding ridges (23) are uniformly distributed on the inner wall of the first central through hole (21) along the circumferential direction, and the protruding ridges (23) are abutted to the outer circumferential wall of the pressure relief silica gel ring (31).
5. The cup cover structure with double pressure relief functions as claimed in claim 2, wherein the pressure relief support (32) comprises a circular ring portion (321) and a circular plate portion (322) which are integrally formed, a first annular groove is formed in an inner wall of the pressure relief silica gel ring (31), the circular ring portion (321) is embedded in the first annular groove, a peripheral wall of the circular plate portion (322) is connected to an inner peripheral wall of the circular ring portion (321), a plurality of second ventilation through holes (323) are uniformly distributed in the circular plate portion (322), and the ventilation film (4) is arranged on a bottom surface of the circular plate portion (322).
6. The double-pressure-release cup cover structure according to claim 5, wherein a first positioning portion (324) is convexly provided upwards at the center of the circular plate portion (322), a plurality of first positioning blades which are convexly provided outwards are evenly distributed on the outer wall of the first positioning portion (324) along the circumferential direction, a second central through hole is provided at the center of the first positioning portion (324), the first positioning blades and the second ventilation through holes (323) are sequentially and alternately arranged, and the outer side walls of the first positioning blades are abutted against the inner wall of the pressure-release spring (33);
the cup cover comprises a cup cover body (1), wherein a second positioning portion (12) is arranged on the inner top of the cup cover body in a downward protruding mode, a plurality of second positioning blades protruding outwards are evenly distributed on the outer wall of the second positioning portion (12) along the circumferential direction, a third central through hole is formed in the center of a first positioning portion (324), the second positioning blades and first ventilation through holes (11) are sequentially and alternately arranged, and the outer side wall of each second positioning blade is abutted to the inner wall of a pressure relief spring (33).
7. The cup cover structure with double pressure relief functions according to claim 1, wherein a second annular groove (24) is formed in the top of the pressure relief base (2), a second protruding ring (13) is convexly arranged on the inner top of the cup cover body (1), a sealing ring (5) is embedded in the second annular groove (24), and the second protruding ring (13) is embedded in the second annular groove (24) and abuts against the sealing ring (5).
8. The cup lid structure with double pressure relief according to any one of claims 1-7, wherein the pressure relief base (2) is sleeved with a cover lid (6) for protecting the air permeable membrane (4).
9. The cup cover structure with the double pressure relief functions as claimed in claim 8, wherein a sealing rubber pad (7) is sleeved on the outer wall of the pressure relief seat (2), the outer wall of the sealing rubber pad (7) is in interference fit with the inner wall of the cup cover body (1), and the outer peripheral wall of the mesh cover lid (6) is abutted against the inner peripheral wall of the sealing rubber pad (7).
10. An electric cup, characterized in that it comprises a cup body (10) and a lid structure according to claims 1 to 9, which covers the top end of the cup body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122862627.6U CN217013465U (en) | 2021-11-19 | 2021-11-19 | Double-pressure-relief type cup cover structure and electric heating cup with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122862627.6U CN217013465U (en) | 2021-11-19 | 2021-11-19 | Double-pressure-relief type cup cover structure and electric heating cup with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217013465U true CN217013465U (en) | 2022-07-22 |
Family
ID=82439189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122862627.6U Active CN217013465U (en) | 2021-11-19 | 2021-11-19 | Double-pressure-relief type cup cover structure and electric heating cup with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217013465U (en) |
-
2021
- 2021-11-19 CN CN202122862627.6U patent/CN217013465U/en active Active
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