CN215286153U - Pump head element, pump head and container comprising such a pump head element - Google Patents
Pump head element, pump head and container comprising such a pump head element Download PDFInfo
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- CN215286153U CN215286153U CN202023012917.3U CN202023012917U CN215286153U CN 215286153 U CN215286153 U CN 215286153U CN 202023012917 U CN202023012917 U CN 202023012917U CN 215286153 U CN215286153 U CN 215286153U
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Abstract
The utility model provides a pump head element, a pump head and a container containing the pump head element, wherein the pump head element comprises a buffer liquid part, an opening part and a closed end; one end of the opening part is communicated with the buffer liquid part, and the other end of the opening part is connected with the closed end; the buffer liquid part and the inner space of the opening part are liquid storage spaces; one end of the liquid storage space is sealed by the external piston, and the other end of the liquid storage space is sealed by the sealed end; the opening part is provided with an opening, and the liquid to be taken enters or leaves the liquid storage space and passes through the opening. The pump head element has simple structure and multiple functions, and is convenient for large-scale production; the requirement on product materials is not required, and the production cost can be reduced; the parts needing to be matched with the device are simple, the number is small, and the device is convenient to produce and assemble; the hybrid function that a plurality of parts of current pump head could be realized can be realized.
Description
Technical Field
The utility model relates to a pump head component and contain pump head and the container of this kind of pump head component, especially be fit for pump head component and the pump head and the container that contain this kind of pump head component of large-scale industrial production, equipment.
Background
The pump head is a product which is frequently used in life of people, and a plurality of liquid or paste products can be taken out of the container by using the pump head.
The unit price of the existing pump head is not high, but the number of elements is large, and the material cost and the assembly cost occupy a large proportion in the production cost. However, the reduction of the number of components requires the reconstruction of the pump head structure, and the development of the reconstructed structure is costly and difficult to realize, and few people are willing to try. Therefore, although the pump head technology belongs to the traditional technology, the application is wide, and the production process is mature, the structure of the pump head is improved substantially for decades, and the elements of the pump head are also changed.
There may be many kinds of existing pump head component materials, such as plastics, metal springs, glass beads, etc., and there may be many kinds of plastics. The recycling of various materials is inconvenient, the recycling of the materials is not facilitated, and the treatment of environmental problems such as plastic pollution is not facilitated.
On the other hand, different elements have different structures and shapes, and the pump head performance of the combination of the elements and other elements can also be different. The prior commonly used pump head has a plurality of problems, such as poor air tightness, large spring elasticity, poor controllability, small volume taken out once, incapability of taking out liquid with high viscosity and consistency, and the like. How to improve the handling hand feeling and the taking-out performance is also a main means for improving the competitiveness of products.
Along with the improvement of living standard of people and the enhancement of environmental protection consciousness, people need pump heads and containers with lower manufacturing cost, convenient recovery and better performance, the operation hand feeling in the taking process is improved, and the performance of taking out fluid by the pump heads is improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of high manufacturing cost, poor performance and the like of the pump heads in the prior art, the utility model provides a pump head element, which comprises a buffer liquid part, an opening part and a closed end;
one end of the opening part is communicated with the buffer liquid part, and the other end of the opening part is connected with the closed end;
the buffer liquid part and the inner space of the opening part are liquid storage spaces;
one end of the liquid storage space is sealed by the external piston, and the other end of the liquid storage space is sealed by the sealed end;
the opening part is provided with an opening, and the liquid to be taken enters or leaves the liquid storage space and passes through the opening.
The liquid storage space of the pump head element has the function of temporarily storing liquid to be taken out, one end of the liquid storage space can be closed by an external piston, and the liquid cannot enter and exit from the end; the other end is closed by a closed end. The buffer liquid part is directly connected with the opening part, and the inner space is communicated with the opening part.
The opening part is provided with an opening through which the liquid to be taken enters or leaves the buffer liquid part and the opening part.
In the pump head element, the opening may be a plurality of openings at the same axial position as the opening. The plurality of openings can increase the caliber of the opening part communicated with the external channel, prevent the blockage caused by high-consistency and large-particle fluid and reduce the loss of circulation pressure.
The caliber of the opening part of the pump head element is smaller than the calibers of other parts of the opening part, so that an annular or groove-shaped channel can be formed, and the pump head element is more smoothly communicated with an external channel.
The pump head element may be such that the buffered liquid portion, the open portion and the closed end are coaxial. The buffered liquid portion, the open portion and the closed end facilitate mechanical assembly of other pump head assemblies above the axis.
In the pump head element, the liquid buffer part may be provided with a projection, which cooperates with the bracket to limit the axial movement distance of the pump head element. The convex portion may be a stopper provided specially, or the buffer liquid portion itself may be used as a stopper by utilizing a difference in diameter between the buffer liquid portion and the opening portion.
The partial outer peripheral surface of the liquid buffer part is provided with a smooth supporting surface parallel to the axis of the liquid buffer part, and the supporting surface supports the pump head element to axially reciprocate integrally. The supporting surface comprises an outer peripheral surface positioned at the buffer liquid part and an outer peripheral surface positioned at the joint of the buffer liquid part and the opening part. After the pump head element is combined with the external supporting piece, the supporting surface supports the pump head element to axially reciprocate in a short distance, and the pump head element is prevented from shaking in a non-axial direction. The smooth surface facilitates supporting the pump head element for axial reciprocation.
The pump head element has a buffered liquid portion with a diameter greater than the diameter of the open and closed ends. The diameter of the buffer liquid part is large, more liquid can be temporarily stored, and the pump head can take out more liquid once. The opening and the closed end have small diameters, so that the material, the space and the assembly cost can be saved.
In the pump head element, the opening side is provided with a position for installing the sealing component. Further, one of the positions where the sealing member is mounted is provided on the closed end. So set up, can save space, also can guarantee sealed effect.
The pump head element has simple structure and multiple functions, and is convenient for large-scale production; the requirement on product materials is not required, and the production cost can be reduced; the parts needing to be matched with the device are simple, the number is small, and the device is convenient to produce and assemble; the hybrid function that a plurality of parts of current pump head could be realized can be realized.
The utility model also provides a pump head, this kind of pump head uses the utility model pump head component.
The utility model also provides a container, this kind of container uses the utility model the pump head.
The pump head and the container overcome various problems in the container in the prior art, and have the advantages of few components, convenient assembly, convenient use, capability of taking out the contained objects with high viscosity and consistency, strong practicability and the like. Meanwhile, the pump head and the container are made of single materials, so that the pump head and the container are convenient to recycle again, and the pressure of plastic on environmental pollution is favorably reduced.
Drawings
FIG. 1 is a cross-sectional view of the pump head of example 1;
FIG. 2 is an exploded view of the pump head of FIG. 1 of example 1;
FIG. 3 is a cross-sectional view of the pump head of example 2;
FIG. 4 is an exploded view of the pump head of FIG. 3 according to example 2;
FIG. 5 is a cross-sectional view of the pump head of example 3 and an exploded view thereof;
FIG. 6 is a perspective view and an exploded view of the pump head of example 3;
FIG. 7 is a cross-sectional view of the pump head of example 4 and an exploded view thereof;
fig. 8 is a perspective view and an exploded view of the pump head according to example 4.
Detailed Description
Example 1
Fig. 1 shows a cross-sectional view of a pump head according to example 1, and fig. 2 shows an exploded view of fig. 1. The pump head comprises an axial movement assembly 1, a piston 2, a sealing member 31, a sealing member 32, a suction channel 4 and its outlet 41, an outflow channel 5 and its inlet 51, a bracket 6, as well as a connecting rod 21, a guide cover 22, a container cover 8.
The axial movement assembly 1 comprises a buffer liquid part 11, an opening part 12 and a closed end 13; one end of the opening part 12 is communicated with the buffer liquid part 11, and the other end is connected with the closed end 13; the internal space of the buffer liquid part 11 and the opening part 12 is a liquid storage space 14; one end of the liquid storage space 14 is sealed by the piston 2, and the other end is sealed by the sealing end 13; the opening portion 12 is provided with a plurality of openings 15, and the liquid to be taken in or out of the liquid storage space 14 passes through the openings 15. A stop ring 16 and a convex rib 17 are arranged on the outer side of the axial motion component 1, and a smooth supporting surface 18 parallel to the axis of the buffer liquid part is arranged on the partial outer peripheral side surface of the axial motion component 1.
The buffer liquid portion 11, the opening 12, and the closed end 13 are on the same axis. A plurality of openings 15 are provided at the same axial position of the opening. Outside the buffer liquid portion 11, a projection stop ring 16 and a rib 17 are provided, which projection cooperates with the holder 6 to limit the distance the axial moving component 1 moves axially. The partial outer peripheral surface of the axial motion component 1 is provided with a supporting surface 18 which supports the overall axial reciprocating motion of the axial motion component 1. On both sides of the opening 15, a position is provided for mounting a sealing ring 31 and a sealing ring 32, wherein the sealing ring 32 is located on the closed end 13. The aperture of the buffer liquid portion 11 is larger than the aperture of the opening 12, and the aperture of the opening 12 is larger than the aperture of the closed end 13. The guide cover 22 facilitates the link 21 to maintain a linear motion and prevent shaking. The air return channel 63 opens at one end into the support 6 below the sealing ring 32 and at the other end into the container lid 8.
The piston 2 is pulled to the outside of the axial motion component 1 through the connecting rod 21, and the axial motion component 1 moves rightwards, so that the opening 15 is communicated with the liquid suction channel 4; the return air passage 63 is opened; and when the piston 2 is pulled continuously, the rib 17 is blocked by the inner side chamfer of the mounting port on the right side of the bracket 6, the axial movement assembly 1 does not move rightwards any more, and liquid to be taken enters the liquid storage space 14 from the liquid suction channel 4 through the opening 15 under the pulling of the piston 2.
The piston 2 is pushed towards the inside of the axial motion component 1 through the connecting rod 21, and the axial motion component 1 moves leftwards, so that the opening 15 is communicated with the outflow channel 5; the return air passage 63 is closed by the seal ring 32; and the piston 2 is pushed continuously, the stop ring 16 is stopped by the mounting opening at the right side of the bracket 6, the axial movement assembly 1 does not move leftwards any more, and the piston 2 pushes the liquid in the liquid storage space 14 to flow out from the outflow channel 5 through the opening 15.
The axial movement component 1 has simple structure and multiple functions, and is convenient for large-scale production; the product material has no high requirement, and the production cost can be reduced; the parts required to be matched with the device are simple, the number of the parts is small, and the device is convenient to produce and assemble.
The pump head that contains the assembly production of axial motion subassembly 1 does the utility model discloses embodiment 1 the pump head. Example 1 this pump head was attached to a container body capable of holding a liquid via a container lid 8, i.e., a container using this pump head was formed. The pump head and the container have the advantages of few components, convenience in assembly and use, capability of taking out the contained objects with high viscosity and consistency, strong practicability and the like. Meanwhile, the pump head and the container are made of single materials and can be made of plastics, so that the plastics can be recycled and reused conveniently.
Example 2
Fig. 3 is a cross-sectional view of a pump head according to embodiment 2, and fig. 4 is an exploded view of fig. 3. The pump head comprises an axial moving component 1, a piston 2, a sealing component 31, a sealing component 32, a liquid suction channel 4, an outflow channel 5, a bracket 6, a connecting rod 21 and a cover 22.
The axial movement assembly 1 comprises a buffer liquid part 11, an opening part 12 and a closed end 13; one end of the opening part 12 is communicated with the buffer liquid part 11, and the other end is connected with the closed end 13; the internal space of the buffer liquid part 11 and the opening part 12 is a liquid storage space 14; one end of the liquid storage space 14 is sealed by the piston 2, and the other end is sealed by the sealing end 13; the opening 12 is provided with an opening 15, through which opening 15 liquid to be taken in or out of the liquid storage space 14 passes. The outside of the axial movement component 1 is provided with a shoulder 16 and a chamfer 17, and the partial outer peripheral side of the axial movement component 1 is provided with a smooth supporting surface 18 parallel to the axis of the buffer liquid part.
The buffer liquid portion 11, the opening 12, and the closed end 13 are on the same axis. A plurality of openings 15 are provided at the same axial position in the opening 12. The buffer liquid part 11 is provided with a shoulder 16 and a chamfer 17 on the outside, and the shoulder 16 and the chamfer 17 are matched with the bracket 6 to limit the axial moving distance of the axial moving component 1. The partial outer peripheral surface of the axial motion component 1 is provided with a supporting surface 18, and the supporting surface 18 supports the axial motion component 1 to axially reciprocate integrally on the bracket 6. On both sides of the opening 15, a position is provided for mounting a sealing ring 31 and a sealing ring 32, wherein the sealing ring 32 is located on the closed end 13. The diameter of the buffer liquid portion 11 is larger than the opening 12, and the diameter of the opening 12 is larger than the closed end 13.
The piston 2 is pulled to the outside of the axial motion component 1 through the connecting rod 21, and the axial motion component 1 moves to the right, so that the opening 15 is communicated with the outlet 41 of the liquid suction channel 4; and the piston 2 is pulled continuously, the chamfer 17 is blocked by the convex rib outside the mounting opening on the right side of the bracket 6, the axial movement component 1 does not move rightwards any more, and liquid to be taken enters the liquid storage space 14 from the liquid suction channel 4 through the opening 15 under the pulling of the piston 2.
The piston 2 is pushed towards the inside of the axial motion assembly 1 through the connecting rod 21, and the axial motion assembly 1 moves leftwards, so that the opening 15 is communicated with the inlet 51 of the outflow channel 5; and the piston 2 is pushed continuously, the shoulder 16 is blocked by the mounting opening at the right side of the bracket 6, the axial movement assembly 1 does not move leftwards any more, and the piston 2 pushes the liquid in the liquid storage space 14 to flow out of the outflow channel 5 through the opening 15.
Similarly, the axial motion assembly 1 of the embodiment has a simple structure and multiple functions, is convenient for large-scale production, and is a core component of a pump head; the method has no high requirement on product materials, and can reduce the production cost; the matched components are simple, the number is small, and the production and the assembly are convenient.
A pump head incorporating an axial motion assembly 1, as described in embodiment 2. Example 2 this pump head is attached to a container body by a container cap 10, i.e. forms a container. The pump head and the container using the same in embodiment 2 have the advantages of few components, convenience in assembly and use, capability of taking out the contained substance with high viscosity and consistency, strong practicability and the like. Meanwhile, the pump head and the container are made of single materials and can be made of plastics, so that the plastics can be recycled and reused conveniently.
Example 3
As shown in fig. 5 and 6, the pump head according to embodiment 3 is shown. Fig. 5 is a sectional view and an exploded view of the pump head according to embodiment 3, and fig. 6 is a perspective view and an exploded view of the pump head according to embodiment 3. The pump head comprises an axial moving assembly 1, a piston 2, a sealing member 31, a sealing member 32, a suction passage 4, an outflow passage 5, a holder 6, and a connecting cover 21.
The axial movement assembly 1 comprises a buffer liquid part 11, an opening part 12 and a closed end 13; one end of the opening part 12 is communicated with the buffer liquid part 11, and the other end is connected with the closed end 13; the internal space of the buffer liquid part 11 and the opening part 12 is a liquid storage space 14; one end of the liquid storage space 14 is sealed by the piston 2, and the other end is sealed by the sealing end 13; the opening 12 is provided with an opening 15, through which opening 15 liquid to be taken in or out of the liquid storage space 14 passes. The buffer liquid portion 11 of the axial movement assembly 1 is larger in diameter than the opening portion 12, forming a shoulder 16. A smooth support surface 18 parallel to the axis of the liquid buffer portion is provided on the partial outer peripheral side surface of the junction between the liquid buffer portion 11 and the opening portion 12. The diameter of the round hole 61 in the middle of the bracket 6 is slightly larger than the diameter of the joint of the buffer liquid part 11 and the opening part 12, and after the axial motion assembly 1 is installed on the bracket 6 through the round hole 61, the sealing part 31 and the sealing part 32 are installed on the opening part 12 and the closed end 13. Further, an outlet 41 of the suction channel 4, an inlet 51 and an outlet 52 of the outflow channel 5 are included.
In this embodiment, the buffer liquid portion 11, the opening 12, and the closed end 13 are on the same axis. A plurality of openings 15 are provided at the same axial position in the opening 12. The buffer liquid part 11 is formed with a shoulder 16 on the outside, and the shoulder 16 and the sealing member 31 cooperate with the bracket 6 to limit the distance of the axial movement assembly 1. The local peripheral side surface of the joint of the buffer liquid part 11 and the opening part 12 is provided with a supporting surface 18, and the supporting surface 18 ensures that the axial motion assembly 1 axially reciprocates on the bracket 6 as a whole. Positions for mounting the sealing member 31 and the sealing member 32 are provided on both sides of the opening 15, wherein the sealing member 32 is located on the closed end 13. The diameter of the buffer liquid part 11 is larger than that of the opening part 12, and the diameter of the opening part 12 is larger than that of the closed end 13.
The piston 2 is pulled to the outside of the axial motion component 1 through the connecting cover 21, and the axial motion component 1 integrally moves upwards to enable the opening 15 to be communicated with the liquid suction channel 4; after the sealing member 31 is blocked by the intermediate partition 62 of the bracket 6, the axial moving assembly 1 does not move upward any more, and the liquid to be taken enters the liquid storage space 14 from the liquid suction passage 4 through the opening 15 under the pulling of the negative pressure formed by the piston 2.
The piston 2 is pushed towards the inside of the axial movement component 1 through the connecting cover 21, and the axial movement component 1 integrally moves downwards to enable the opening 15 to be communicated with the outflow channel 5; after the shoulder 16 is blocked by the intermediate partition 62 of the bracket 6, the axial moving component 1 does not move downwards any more, and the piston 2 pushes the liquid in the liquid storage space 14 to flow out from the outflow channel 5 through the opening 15.
Similarly, the axial motion component 1 of the embodiment has simple structure and multiple functions, and is convenient for large-scale production; the requirement on product materials is not required, and the production cost can be reduced; the parts required to be matched with the device are simple, the number of the parts is small, and the device is convenient to produce and assemble.
Example 4
Fig. 7 and 8 show a pump head according to embodiment 4. Fig. 7 is a sectional view and an exploded view of the pump head according to embodiment 4, and fig. 8 is a perspective view and an exploded view of the pump head according to embodiment 4. The pump head comprises an axial moving assembly 1, a piston 2, a suction channel 4, an outflow channel 5, a bracket 6, a connecting rod 21 and a cover 22.
The axial movement assembly 1 comprises a buffer liquid part 11, an opening part 12 and a closed end 13; one end of the opening part 12 is communicated with the buffer liquid part 11, and the other end is connected with the closed end 13; the internal space of the buffer liquid part 11 and the opening part 12 is a liquid storage space 14; one end of the liquid storage space 14 is sealed by the piston 2, and the other end is sealed by the sealing end 13; the opening portion 12 is provided with a plurality of openings 15, and the liquid to be taken in or out of the liquid storage space 14 passes through the openings 15. A stop ring 16 and a stop ring 17 are arranged on the outer side of the axial movement component 1, and a smooth support surface 18 parallel to the axis of the buffer liquid part is arranged on the local outer peripheral side surface of the axial movement component 1. The support 6 supports a support surface 18 supporting the axial motion assembly 1 for overall axial reciprocation. The diameter of the buffer liquid part 11 is larger than the opening part 12 and the closed end 13, and the opening part 12 and the closed end 13 have the same diameter.
The piston, the buffer liquid portion 11, the opening 12, and the closed end 13 are coaxial. A plurality of openings 15 are provided at the same axial position of the opening. The buffer liquid part 11 is provided with a stop ring 16 and a stop ring 17 outside, and the stop ring 16 and the stop ring 17 are matched with the bracket 6 to limit the axial movement distance of the axial movement component 1. The partial outer peripheral surface of the axial motion component 1 is provided with a supporting surface 18 which supports the overall axial reciprocating motion of the axial motion component 1.
On both sides of the circular frame 7 are the outlet 41 of the suction channel 4 and the inlet 51 of the outflow channel 5, respectively, the inlet 51 of the outflow channel 5 being located on the outside. A position where the seal member 31 is attached is provided on the inner surface of the frame 7. The sealing member 31 allows the opening and closing ends of the axial moving member 1 to reciprocate while closing a gap between the outlet 41 of the liquid suction path 4 and the inlet 51 of the outflow path 5 to prevent mixed flow. After the opening portion 12 and the closed end 13 of the axial movement assembly 1 are mounted on the frame 7, the mounting opening is sealed with the sealing member 32. The cover 22 facilitates the link 21 to maintain a linear motion and prevent shaking.
The piston 2 is pulled to the outside of the axial motion component 1 through the connecting rod 21, and the axial motion component 1 moves rightwards, so that the opening 15 is communicated with the liquid suction channel 4; the piston 2 is pulled further, the blocking ring 17 is blocked by the holder 6, the axial movement assembly 1 is no longer moved to the right, and the liquid to be taken is drawn from the suction channel 4 into the liquid storage space 14 through the opening 15 by the pulling of the piston 2.
The piston 2 is pushed towards the inside of the axial motion component 1 through the connecting rod 21, and the axial motion component 1 moves leftwards, so that the opening 15 is communicated with the outflow channel 5; the piston 2 is pushed continuously, the stop ring 16 is stopped by the bracket 6, the axial movement assembly 1 can not move leftwards any more, and the piston 2 pushes the liquid in the liquid storage space 14 to flow out of the outflow channel 5 through the opening 15.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, variations and combinations can be made in these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A pump head element comprising a buffered liquid portion, an open portion and a closed end;
one end of the opening part is communicated with the buffer liquid part, and the other end of the opening part is connected with the closed end;
the buffer liquid part and the inner space of the opening part are liquid storage spaces;
one end of the liquid storage space is sealed by an external piston, and the other end of the liquid storage space is sealed by the sealed end;
the opening part is provided with an opening, and liquid to be taken enters or leaves the liquid storage space and passes through the opening.
2. A pump head element as claimed in claim 1, wherein the openings are a plurality of openings at the same axial position as the aperture.
3. A pumphead element as claimed in claim 1, wherein the aperture at the opening is smaller than the aperture of the remainder of the opening.
4. A pumphead element as claimed in claim 1, wherein the buffered liquid portion, the open portion and the closed end are co-axial.
5. A pump head element as claimed in claim 1, wherein the liquid-retaining portion is provided with a projection on the outside thereof.
6. A pump head element as claimed in claim 1, wherein the peripheral surface of the liquid-retaining portion is provided with a smooth bearing surface parallel to the axis of the liquid-retaining portion.
7. A pump head element as claimed in claim 1, wherein the diameter of the buffered liquid portion is greater than the diameter of the open and closed ends; alternatively, the diameter of the opening portion is larger than the diameter of the closed end.
8. A pump head element as claimed in claim 1, wherein the open side is provided with a location for mounting the sealing means.
9. A pump head comprising the pump head element of claim 1.
10. A container comprising the pump head of claim 9.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023012917.3U CN215286153U (en) | 2020-12-15 | 2020-12-15 | Pump head element, pump head and container comprising such a pump head element |
| PCT/CN2021/138443 WO2022127832A1 (en) | 2020-12-15 | 2021-12-15 | Pump head element and pump head comprising same, and container |
| JP2023537582A JP2023554678A (en) | 2020-12-15 | 2021-12-15 | Pump head parts, pump heads and containers using the same |
| EP21905758.5A EP4265539A4 (en) | 2020-12-15 | 2021-12-15 | Pump head element and pump head comprising same, and container |
| US18/335,964 US20240026877A1 (en) | 2020-12-15 | 2023-06-15 | Pump head element and pump head comprising same, and container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023012917.3U CN215286153U (en) | 2020-12-15 | 2020-12-15 | Pump head element, pump head and container comprising such a pump head element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215286153U true CN215286153U (en) | 2021-12-24 |
Family
ID=79512439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023012917.3U Active CN215286153U (en) | 2020-12-15 | 2020-12-15 | Pump head element, pump head and container comprising such a pump head element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215286153U (en) |
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2020
- 2020-12-15 CN CN202023012917.3U patent/CN215286153U/en active Active
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