CN213581575U - Supporting mechanism capable of offsetting weight of object stage and microscope using same - Google Patents
Supporting mechanism capable of offsetting weight of object stage and microscope using same Download PDFInfo
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- CN213581575U CN213581575U CN202022332264.0U CN202022332264U CN213581575U CN 213581575 U CN213581575 U CN 213581575U CN 202022332264 U CN202022332264 U CN 202022332264U CN 213581575 U CN213581575 U CN 213581575U
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Abstract
The utility model discloses a can offset supporting mechanism of objective table gravity and use its microscope belongs to bearing structure and microscope equipment technical field. The load of the lifting structure of the existing microscope is limited and is a bearing weak point of the microscope, and the bearing capacity of the lifting structure determines the bearing capacity of the whole microscope. The utility model relates to a can offset supporting mechanism of objective table gravity, the elastic component that the objective table can be connected in the assembly can alleviate the elevation structure load of objective table to the microscope body, and then increase objective table and microscopical bearing capacity. The utility model can realize the lifting and pressure reducing support of the objective table; the requirement of individual customers on the high-load object stage can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; moreover, the utility model has simple and practical scheme, ingenious design and low manufacturing cost.
Description
Technical Field
The utility model relates to a can offset supporting mechanism of objective table gravity and use its microscope belongs to bearing structure and microscope equipment technical field.
Background
In the existing microscope, a lifting/focusing mechanism of the microscope realizes vertical lifting movement by matching a set of complex gear reduction mechanism and a rack, and because of the volume, the load of a vertical lifting structure is limited, which is a bearing weak point of the microscope, and the bearing capacity of the lifting structure determines the bearing capacity of the whole microscope.
Further, according to practical application conditions, the user needs to install the objective table on the lifting/focusing mechanism of the microscope, and the electric objective table with a large stroke is adopted or is reformed to a certain extent according to the self requirement. Both of the above situations are very likely to result in overload operation of the lifting structure.
At this time, if the lifting structure is directly made of a material with high structural strength to meet the extreme requirements of individual customers, the manufacturing cost of the microscope will be greatly increased, and market popularization and sale are affected.
However, if the conventional gear reduction structure is used to manufacture the lifting structure, the actual weight of the stage may exceed the maximum safe weight that can be borne by the vertical axis of the microscope during the use of individual customers, and after a period of electric focusing operation, the lifting structure of the microscope may be affected, which may result in irreversible permanent damage, affect the use accuracy of the microscope, and further cause significant economic loss.
SUMMERY OF THE UTILITY MODEL
To the defect of prior art, the utility model aims to provide an on original supporting mechanism, the assembly can effectively alleviate the elastic component of elevation structure year thing pressure, offsets objective table gravity through elastic force, and then increases the bearing capacity of carrying the objective table, satisfies the demand of individual customer to the high load objective table, has effectively avoided elevation structure's damage to simple structure, low in manufacturing cost, the supporting mechanism of convenient to popularize and sell and use its microscope.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a supporting mechanism capable of offsetting the gravity of an object stage comprises a supporting structure capable of assembling a microscope body;
the support structure is provided with an L-shaped part which is provided with an elastic part capable of being connected with the objective table;
one end of the elastic piece is arranged on the supporting structure, and the other end of the elastic piece can be connected to the objective table to counteract the gravity of the objective table through elastic force.
The utility model discloses through constantly exploring and experimental, break current supporting mechanism and only wholly support the microscope, can not be to the technological bias that the supplementary decompression of part supported, the utility model discloses the elastic component of objective table can be connected in the assembly, the elevation structure load of objective table to the microscope body can be alleviateed, and then increase objective table and microscopical bearing capacity.
The utility model can realize the lifting and pressure reducing support of the objective table; the requirement of individual customers on the high-load object stage can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; and the utility model discloses the scheme is simple, practical, can support microscope local structure, conceives ingeniously, low in manufacturing cost, convenient to popularize and use, sale.
Furthermore, the utility model can select elastic pieces with different specifications according to different object stages and object carrying weights, so as to ensure that the object stage can be suitable for various occasions; the stage design will no longer be limited by weight and there are unlimited possibilities.
Further, the utility model discloses can upgrade fast to current supporting mechanism and reform transform, it is with low costs to reform transform, and the facilitate promotion is sold.
As a preferable technical measure:
the elastic piece is a spring, one end of the elastic piece is suspended on the vertical part of the L-shaped piece, and the other end of the elastic piece is fixedly connected with the side end of the objective table;
when the spring is stretched, a return acting force is provided; and part of the weight of the objective table is born by the restoring force of the spring, so that the whole weight of the objective table is not more than the maximum load of the lifting structure.
Or the elastic part is a pressure spring, one end of the elastic part is assembled at the upper end of the transverse part of the L-shaped part, and the other end of the elastic part is fixedly connected with the lower end part of the objective table.
When the spring cannot be used for various reasons, the spring may be replaced by a compressed spring.
The objective table compression pressure spring, the pressure spring provides the support resilience force, and then the partial weight of objective table and year thing is born by the pressure spring, avoids elevation structure to bear too much load.
As a preferable technical measure:
the springs are constant force springs, the number of the springs is 2, and the springs are symmetrically suspended on the vertical part of the L-shaped piece.
When the spring is stretched, the spring provides the original-state acting force, and the force is a constant value, so that the objective table can be controlled to accurately lift.
As a preferable technical measure:
the vertical part of the L-shaped part is a sheet library frame with an accommodating cavity; the supporting structure can also be used as a film library frame, so that the structure of the supporting mechanism is more compact and the occupied space is small.
The film library rack is provided with a connecting piece which can be fixedly connected with the side end of the objective table.
As a preferable technical measure:
the connecting piece is a mouth-shaped frame;
a cross bar at the upper end of the mouth-shaped frame is fixedly connected with the constant force spring;
the opening of the mouth-shaped frame is communicated with the accommodating cavity of the film library frame.
The connecting piece is a mouth-shaped frame, so that the connecting piece is convenient to assemble with the spring; the cross rod at the upper end of the mouth-shaped frame is fixedly connected with the constant force spring, so that the spring is prevented from interfering with normal sheet taking and placing.
The opening of mouth type frame communicates with each other with the chamber that holds of square frame body, and then the assembly structure of spring can not interfere original piece storehouse and use, is convenient for upgrade the transformation to original supporting mechanism, and the scheme is feasible.
As a preferable technical measure:
a vertical guide rail is arranged at one of a cross rod at the lower end of the mouth-shaped frame and the side end of the film library frame, and a sliding groove is arranged at the other side;
the guide rail can slide in the sliding groove in a reciprocating mode, and sliding limiting of the objective table on the supporting structure is achieved.
The guide rail is arranged along the vertical direction, vertical movement of the objective table connecting piece is realized, and mechanical limit is arranged at the two ends of the guide rail to limit the maximum movement position of the objective table connecting piece.
As a preferable technical measure:
the pressure spring is arranged in a cavity of a guide rod;
the guide bar can hang down and establish in the objective table below, can effectively spacing to the pressure spring, and the structure is practical.
As a preferable technical measure:
a support rod is arranged above the guide rod;
the bracing piece is solid cylinder structure, and its upper end is equipped with the bulb that can offset with the objective table bottom surface, and its lower extreme is equipped with the portion of suppressing that can oppress the pressure spring from the top down.
The bracing piece is solid construction, is located the guide bar inside, and can be in the guide bar free motion, and one end compresses tightly the pressure spring, and one end is the bulb and contacts with the objective table. When the objective table moves downwards, the supporting rod moves downwards along with the objective table, the pressure spring is compressed at the moment, partial weight of the objective table and an object is borne by the pressure spring, the objective pressure of the lifting structure can be reduced, and the bearing capacity of the objective table is increased. When the objective table moves upwards, the pressure spring is recovered.
As an optional technical measure for applying a supporting mechanism capable of offsetting the gravity of the object stage:
a microscope comprises the support mechanism capable of offsetting the gravity of an object stage, the object stage and a microscope body; the microscope body is arranged on the supporting mechanism, and the lifting structure of the microscope body is assembled with the objective table;
the object stage is assembled on the microscope body in a lifting mode through a lifting structure;
one end of the elastic piece is connected to the supporting structure, and the other end of the elastic piece is arranged on the objective table;
the load of the stage on the lifting structure is reduced by the elastic force of the elastic member.
The utility model discloses through constantly exploring and experimental, break current supporting mechanism and only wholly support the microscope, can not be to the technological bias that the supplementary decompression of part supported, the utility model discloses the elastic component of objective table can be connected in the assembly, the elevation structure load of objective table to the microscope body can be alleviateed, and then increase objective table and microscopical bearing capacity.
The utility model can realize the lifting and pressure reducing support of the objective table; the requirement of individual customers on the high-load object stage can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; and the utility model discloses the scheme is simple, practical, thinks about ingeniously, low in manufacturing cost, the facilitate promotion is sold.
Furthermore, the utility model can select the elastic pieces with different specifications according to different carrying weights, so as to ensure that the microscope can be suitable for various occasions; microscope design will no longer be limited by the weight of the load, with infinite possibilities.
Further, the utility model discloses can upgrade the transformation fast to current microscope, it is with low costs to reform transform, and the facilitate promotion is sold.
As a preferable technical measure:
the lifting structure comprises a gear speed reducing mechanism and a rack;
the gear speed reducing mechanism is assembled on the microscope body, and the rack is assembled on the objective table or a support connected with the objective table.
The lifting structure adopts a gear reduction mechanism and a rack matching scheme, and is simple and practical in structure and convenient to produce and manufacture.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses through constantly exploring and experimental, break current supporting mechanism and only wholly support the microscope, can not be to the technological bias that the supplementary decompression of part supported, the utility model discloses the elastic component of objective table can be connected in the assembly, the elevation structure load of objective table to the microscope body can be alleviateed, and then increase objective table and microscopical bearing capacity.
The utility model can realize the lifting and pressure reducing support of the objective table; the requirement of individual customers on the high-load object stage can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; and the utility model discloses the scheme is simple, practical, thinks about ingeniously, low in manufacturing cost, the facilitate promotion is sold.
Furthermore, the utility model can select the elastic pieces with different specifications according to different carrying weights, so as to ensure that the carrying platform can be suitable for various occasions; the stage design will no longer be limited by weight and there are unlimited possibilities.
Further, the utility model discloses can upgrade fast to current supporting mechanism and reform transform, it is with low costs to reform transform, and the facilitate promotion is sold.
Drawings
FIG. 1 is a structural view of the spring of the present invention;
FIG. 2 is a view of the structure of FIG. 1, shown in a converted angle;
FIG. 3 is a structural view of the present invention with a pressure spring;
fig. 4 is a view illustrating the structure shown in fig. 3 converted to a certain angle.
Description of reference numerals:
1. an object stage; 2. a support structure; 3. a constant force spring; 4. a guide bar; 5. a support bar; 6. a microscope body; 11. a connecting member; 111. a chute; 21. a vertical portion; 22. a transverse portion; 23. a film library rack; 231. a guide rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in order to provide a better understanding of the present invention to the public, certain specific details are set forth in the following detailed description of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
It should be noted that when two elements are "fixedly" or "slidably connected," the two elements may be directly connected or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "upper," "lower," and the like are used herein for illustrative purposes only.
1-4, a support mechanism capable of counteracting the weight of a stage, comprises a support structure 2 capable of mounting a microscope body 6;
the support structure 2 is provided with an L-shaped element which is provided with an elastic element capable of being connected with the objective table 1;
elastic component one end sets up on bearing structure 2, and the other end can be connected on objective table 1, offsets objective table 1 gravity through elastic force.
The utility model discloses through constantly exploring and experimental, break current supporting mechanism and only wholly support the microscope, can not be to the technological bias that the supplementary decompression of part supported, the utility model discloses the elastic component of objective table 1 can be connected in the assembly, can alleviate objective table 1 to the elevation structure load of microscope body 6, and then increase objective table 1 and microscopical bearing capacity.
The utility model can realize the lifting and pressure reducing support of the objective table 1; the requirement of individual customers on the high-load objective table 1 can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; and the utility model discloses the scheme is simple, practical, thinks about ingeniously, low in manufacturing cost, the facilitate promotion is sold.
Furthermore, the utility model can select the elastic pieces with different specifications according to different carrying weights, so as to ensure that the carrying platform 1 can be suitable for various occasions; the stage 1 design will no longer be limited by weight and there are unlimited possibilities.
Further, the utility model discloses can upgrade fast to current supporting mechanism and reform transform, it is with low costs to reform transform, and the facilitate promotion is sold.
The utility model discloses a concrete embodiment of elastic component:
the elastic element is a spring, one end of the elastic element is suspended on the vertical part 21 of the L-shaped element, and the other end of the elastic element is fixedly connected with the side end of the objective table 1;
when the spring is stretched, a return acting force is provided; part of the weight of the object stage 1 is born by the restoring force of the spring, so that the whole weight of the object stage 1 is ensured not to exceed the maximum load of the lifting structure.
The utility model discloses another kind of embodiment of elastic component:
the elastic element is a compression spring, one end of the elastic element is assembled at the upper end of the transverse part 22 of the L-shaped element, and the other end of the elastic element is fixedly connected with the lower end part of the objective table 1.
When the spring cannot be used for various reasons, the spring may be replaced by a compressed spring.
When the objective table 1 moves downwards, the compression spring is compressed at the moment, and partial weight of the objective table 1 and an object is borne by the compression spring, so that the lifting structure is prevented from bearing excessive load.
The utility model discloses spring structure a concrete embodiment:
the springs are constant force springs 3, the number of the springs is 2, and the springs are symmetrically suspended on a vertical part 21 of the L-shaped piece.
When the spring is stretched, the spring provides a resilient acting force, and the force is a constant value, so that the object stage 1 can be controlled to accurately lift.
The utility model discloses a concrete embodiment of L shape spare:
the vertical part 21 of the L-shaped piece is a piece warehouse rack 23 with an accommodating cavity; the supporting structure 2 can also be used as a film warehouse rack 23, so that the structure of the supporting structure is more compact and the occupied space is small.
The film storage rack 23 is provided with a connecting piece 11 which can be fixedly connected with the side end of the object stage 1.
The utility model discloses a concrete embodiment of connecting piece 11:
the connecting piece 11 is a mouth-shaped frame;
a cross bar at the upper end of the mouth-shaped frame is fixedly connected with a constant force spring 3;
the through opening of the mouth-shaped frame is communicated with the containing cavity of the film library frame 23.
The connecting piece 11 is a mouth-shaped frame, so that the spring can be conveniently assembled; the cross rod at the upper end of the mouth-shaped frame is fixedly connected with the constant force spring 3, so that the spring is prevented from interfering with normal sheet taking and placing.
The opening of mouth type frame communicates with each other with the chamber that holds of square frame body, and then the assembly structure of spring can not interfere original piece storehouse and use, is convenient for upgrade the transformation to original supporting mechanism, and the scheme is feasible.
The utility model discloses add a specific embodiment of limit structure:
a vertical guide rail 231 is arranged at one of a cross bar at the lower end of the mouth-shaped frame and the side end of the film library frame 23, and the other is provided with a sliding groove 111;
the guide rail 231 can slide back and forth in the slide groove 111, and the slide limit of the stage 1 on the support structure 2 is realized.
The guide rail 231 is arranged along the vertical direction, so that the vertical movement of the connecting piece 11 of the objective table 1 is realized, and the two ends of the guide rail 231 are provided with mechanical limits to limit the maximum movement position of the connecting piece 11 of the objective table 1.
The utility model discloses pressure spring structure a concrete embodiment:
the pressure spring is arranged in a cavity of a guide rod 4;
the guide rod 4 can hang down and establish in objective table 1 below, can effectively spacing to the pressure spring, and the structure is practical.
A support rod 5 is arranged above the guide rod 4;
the support rod 5 is of a solid cylindrical structure, the upper end of the support rod is provided with a ball head which can be abutted against the bottom surface of the objective table 1, and the lower end of the support rod is provided with a pressing part which can press the pressure spring from top to bottom.
The support rod 5 is of a solid structure, is positioned inside the guide rod 4 and can freely move in the guide rod 4, one end of the support rod compresses the pressure spring, and the other end of the support rod is a ball head and is in contact with the objective table 1. When the objective table 1 moves downwards, the support rod 5 moves downwards along with the objective table 1, the compression spring is compressed at the moment, partial weight of the objective table 1 and an object is borne by the compression spring, the carrying pressure of the lifting structure can be reduced, and the bearing capacity of the objective table 1 is increased. When the object stage 1 moves upward, the compression spring is restored.
The utility model discloses use the embodiment that can offset the supporting mechanism of objective table gravity:
a microscope comprises the support mechanism capable of offsetting the gravity of the object stage, the object stage 1 and a microscope body 6; the microscope body 6 is arranged on the supporting mechanism, and the lifting structure of the microscope body is assembled with the objective table 1;
the objective table 1 is assembled on the microscope body 6 in a lifting way through a lifting structure;
one end of the elastic part is connected to the supporting structure 2, and the other end of the elastic part is arranged on the objective table 1;
the load of the stage 1 on the elevating structure is reduced by the elastic force of the elastic member.
The utility model discloses through constantly exploring and experimental, break current supporting mechanism and only wholly support the microscope, can not be to the technological bias that the supplementary decompression of part supported, the utility model discloses the elastic component of objective table 1 can be connected in the assembly, can alleviate objective table 1 to the elevation structure load of microscope body 6, and then increase objective table 1 and microscopical bearing capacity.
The utility model can realize the lifting and pressure reducing support of the objective table 1; the requirement of individual customers on the high-load objective table 1 can be effectively met, meanwhile, the damage caused by overload work of the lifting structure can be effectively avoided, the use precision of the microscope is ensured, and the economic loss caused by overload is avoided; and the utility model discloses the scheme is simple, practical, thinks about ingeniously, low in manufacturing cost, the facilitate promotion is sold.
Furthermore, the utility model can select the elastic pieces with different specifications according to different carrying weights, so as to ensure that the microscope can be suitable for various occasions; microscope design will no longer be limited by the weight of the load, with infinite possibilities.
Further, the utility model discloses can upgrade the transformation fast to current microscope, it is with low costs to reform transform, and the facilitate promotion is sold.
The utility model discloses a concrete embodiment of elevation structure:
the lifting structure comprises a gear speed reducing mechanism and a rack;
the gear reduction mechanism is assembled on the microscope body 6, and the rack is assembled on the objective table 1.
The lifting structure adopts a gear reduction mechanism and a rack matching scheme, and is simple and practical in structure and convenient to produce and manufacture.
In the application, the fastening mode can be a bolt connection, a welding, a riveting, an inserting connection or a connection through a third component, and the person skilled in the art can select the fastening mode according to the actual situation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A support mechanism capable of counteracting the weight of a stage, comprising a support structure (2) capable of mounting a microscope body (6);
it is characterized in that the preparation method is characterized in that,
the support structure (2) is provided with an L-shaped part which is provided with an elastic part capable of being connected with the objective table (1);
one end of the elastic piece is arranged on the supporting structure (2), the other end of the elastic piece can be connected to the objective table (1), and gravity of the objective table (1) is offset through elastic force.
2. The support mechanism capable of counteracting the weight of the stage of claim 1,
the elastic piece is a spring, one end of the elastic piece is suspended on the vertical part (21) of the L-shaped piece, and the other end of the elastic piece is fixedly connected with the side end of the objective table (1);
or the elastic element is a pressure spring, one end of the elastic element is assembled at the upper end of the transverse part (22) of the L-shaped element, and the other end of the elastic element is fixedly connected with the lower end part of the objective table (1).
3. A support mechanism capable of counteracting the weight of the carrier as claimed in claim 2,
the springs are constant force springs (3), the number of the springs is 2, and the springs are symmetrically suspended on a vertical part (21) of the L-shaped piece.
4. A support mechanism capable of counteracting the weight of the carrier as claimed in claim 3,
the vertical part (21) of the L-shaped piece is a piece library rack (23) with an accommodating cavity;
the film storage rack (23) is provided with a connecting piece (11) which can be fixedly connected with the side end of the objective table (1).
5. A support mechanism capable of counteracting the weight of the carrier as claimed in claim 4,
the connecting piece (11) is a mouth-shaped frame;
a cross bar at the upper end of the mouth-shaped frame is fixedly connected with a constant force spring (3);
the through opening of the mouth-shaped frame is communicated with the containing cavity of the sheet storage rack (23).
6. A support mechanism capable of counteracting the weight of the carrier as claimed in claim 5,
a vertical guide rail (231) is arranged at one of a cross bar at the lower end of the mouth-shaped frame and the side end of the sheet storage rack (23), and the other is provided with a sliding groove (111);
the guide rail (231) can slide in the sliding groove (111) in a reciprocating mode, and sliding limiting of the objective table (1) on the supporting structure (2) is achieved.
7. A support mechanism capable of counteracting the weight of the carrier as claimed in claim 2,
the pressure spring is arranged in a cavity of a guide rod (4);
the guide rod (4) can be vertically arranged below the objective table (1).
8. The support mechanism capable of counteracting the weight of the stage of claim 7,
a support rod (5) is arranged above the guide rod (4);
the support rod (5) is of a solid cylindrical structure, the upper end of the support rod is provided with a ball head which can be abutted against the bottom surface of the objective table (1), and the lower end of the support rod is provided with a pressing part which can press the pressure spring from top to bottom.
9. A microscope comprising a support mechanism according to any one of claims 1 to 8 capable of counteracting the weight of the stage, the stage (1), the microscope body (6); the microscope body (6) is arranged on the supporting mechanism, and the lifting structure of the microscope body is assembled with the objective table (1);
the objective table (1) is assembled on the microscope body (6) in a lifting manner through a lifting structure;
one end of the elastic piece is connected to the supporting structure (2), and the other end of the elastic piece is arranged on the objective table (1);
the load of the objective table (1) on the lifting structure is reduced by the elastic force of the elastic piece.
10. A microscope according to claim 9,
the lifting structure comprises a gear speed reducing mechanism and a rack;
the gear speed reducing mechanism is assembled on the microscope body (6), and the rack is assembled on the objective table (1) or a support connected with the objective table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022332264.0U CN213581575U (en) | 2020-10-19 | 2020-10-19 | Supporting mechanism capable of offsetting weight of object stage and microscope using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022332264.0U CN213581575U (en) | 2020-10-19 | 2020-10-19 | Supporting mechanism capable of offsetting weight of object stage and microscope using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213581575U true CN213581575U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022332264.0U Active CN213581575U (en) | 2020-10-19 | 2020-10-19 | Supporting mechanism capable of offsetting weight of object stage and microscope using same |
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| Country | Link |
|---|---|
| CN (1) | CN213581575U (en) |
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2020
- 2020-10-19 CN CN202022332264.0U patent/CN213581575U/en active Active
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