CN220320740U - Accurate positioning auxiliary support for polygonal mapping area - Google Patents
Accurate positioning auxiliary support for polygonal mapping area Download PDFInfo
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- CN220320740U CN220320740U CN202321578065.5U CN202321578065U CN220320740U CN 220320740 U CN220320740 U CN 220320740U CN 202321578065 U CN202321578065 U CN 202321578065U CN 220320740 U CN220320740 U CN 220320740U
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- 238000013507 mapping Methods 0.000 title claims abstract description 32
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 230000035939 shock Effects 0.000 claims description 38
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a polygon survey and drawing regional accurate positioning auxiliary stand, relates to survey and drawing technical field, including setting up subaerial firm base plate, be provided with on the firm base plate with ground complex solid foot subassembly, be provided with three sets of firm poles on the firm base plate, be provided with on the firm base plate with firm pole complex rotating assembly; every set of firm pole top end both ends department all is provided with rotates the connecting piece, and is provided with between two adjacent firm poles and rotates connecting piece complex cross connection subassembly, and is provided with horizontal coupling assembling between two adjacent firm poles, is provided with survey and drawing bed frame between three firm poles, and survey and drawing bed frame's top end both ends department all is provided with the link spare, and the link spare is provided with the tensile expansion assembly of being connected with every firm pole of group respectively. The utility model has higher positioning precision and working efficiency through the unique structural design, can ensure mapping precision in various severe environments, and has wide application prospect and development potential.
Description
Technical Field
The utility model relates to the technical field of surveying and mapping, in particular to an auxiliary bracket for accurately positioning a polygonal surveying and mapping region.
Background
The mapping is the subject of measuring and collecting natural geography and artificial facilities and drawing a graph, and has wide application, especially in the aspects of natural geography and the like. Various surveying instruments are used in the surveying process, wherein the total station is one of the commonly used high-technology measuring instruments, and can realize the functions of measuring horizontal angle, vertical angle, distance, height difference and the like, especially when the surveying instrument is used outdoors.
Thus, with the rapid development of modern mapping technology, more and more polygonal mapping tasks need to be accomplished in an outdoor environment. In such environments, surveying instruments face a number of challenges such as susceptibility to scratching and storage inconvenience, fixing wind resistance and handling wind and seismic disturbances, and problems such as susceptibility to scratching and storage inconvenience, which seriously affect the efficiency and quality of the surveying work, are faced when using surveying instruments. In addition, when mapping is performed under severe weather conditions, fixed windproof work is required to be performed for the mapping instrument, and stability and use convenience of the measuring mirror are ensured. Meanwhile, outdoor measurement also needs to process wind and earthquake interference so as to improve mapping accuracy.
How to solve the technical problems is the subject of the present utility model.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides the polygonal surveying and mapping region accurate positioning auxiliary support which is reasonable in design, safe and reliable, has higher positioning precision and working efficiency, can ensure surveying and mapping precision in various severe environments, and has wide application prospect and development potential.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a polygon survey and drawing regional accurate positioning auxiliary stand, includes the firm base plate that sets up subaerial, be provided with on the firm base plate with ground complex solid foot subassembly, be provided with three sets of firm poles on the firm base plate, be provided with on the firm base plate with firm pole complex rotating assembly;
each group the firm pole top end both ends department all is provided with rotates the connecting piece, and adjacent two be provided with between the firm pole with rotate connecting piece complex cross connection subassembly, and adjacent two be provided with between the firm pole with cross connection subassembly complex horizontal connection subassembly, three groups be provided with survey and drawing bed frame between the firm pole, the top end both ends department of survey and drawing bed frame all is provided with the link spare, the link spare is provided with the tensile expansion assembly of being connected with the firm pole of each group respectively.
Further, the rotating assembly comprises a rotating seat arranged on the stable substrate, a rotating groove is formed in the rotating seat, a rotating piece matched with the stable rod is arranged in the rotating groove, the rotating piece comprises a clamping cylinder matched with the stable rod, a clamping screw is arranged in the clamping cylinder, and a rotating shaft matched with the rotating seat is arranged on the clamping cylinder.
Further, the rotating connecting piece is including the cover establishing the connecting cylinder on the firm pole, the centre department coaxial coupling disc that is provided with of connecting cylinder, the top end both ends department of coupling disc all is provided with a plurality of connection ball groove, just be provided with on the connecting cylinder with firm pole complex set screw, be provided with in the connection ball groove with cross connection subassembly or horizontal coupling subassembly or tensile expansion assembly complex connecting unit.
Further, the connecting unit comprises a connecting frame, a U-shaped groove matched with the connecting disc is formed in the connecting frame, a top supporting hydraulic rod matched with the connecting ball groove is arranged at two ends of an opening of the U-shaped groove, and connecting frame parts matched with the cross connecting assembly or the horizontal connecting assembly or the stretching and telescoping assembly are rotatably connected to the connecting frame.
Further, the cross connection assembly comprises a first connecting rod, two ends of the first connecting rod are respectively matched with the connecting telescopic parts of the rotating connecting pieces, the first connecting rod is rotationally connected with a second connecting rod, grooves matched with the second connecting rod are formed in the first connecting rod, and the connecting telescopic parts are respectively arranged at two ends of the second connecting rod;
the connecting telescopic member is in including setting up head rod or second connecting rod tip, and with head rod or second connecting rod rotate the flexible section of thick bamboo of hydraulic pressure of being connected, the flexible end department of hydraulic pressure flexible section of thick bamboo is provided with the buffer rod, just the flexible end of hydraulic pressure flexible section of thick bamboo seted up with buffer rod complex buffer chamber, just be provided with buffer spring on the buffer rod, the tip of buffer rod be provided with rotate connecting member complex connection U type frame.
The horizontal connecting assembly comprises a connecting edge, the two ends of the connecting edge are all rotationally connected with a telescopic hydraulic cylinder, a shock absorbing rod is arranged at the moving end of the telescopic hydraulic cylinder, a shock absorbing cavity matched with the shock absorbing rod is formed at the moving end of the telescopic hydraulic cylinder, a shock absorbing spring is sleeved on the shock absorbing rod, and a hinge bracket matched with the rotating connecting piece is arranged on the shock absorbing rod.
Further, the survey and drawing bed frame is including being used for placing the survey and drawing frame of surveying and drawing instrument, just be provided with the spirit level on the survey and drawing frame, the top end both ends punishment of survey and drawing frame do not rotate and are connected with the rolling disc, establish on the rolling disc and follow the circumference of rolling disc evenly is provided with three group's link spare, just the rotation link spare is located on the link spare.
Further, stretch the flexible subassembly and include the stretch rod, the both ends department of stretch rod all rotates and is connected with the stretch rod, the removal end department of stretch rod is provided with the shock attenuation pole, the removal end department of stretch rod seted up with shock attenuation pole complex shock attenuation chamber, the cover is equipped with damping spring on the shock attenuation pole, be provided with on the shock attenuation pole with rotate connecting piece complex shock attenuation link.
Further, the stabilizing rod is sleeved with a slow-moving sleeve, the slow-moving sleeves are respectively provided with a slow-moving annular plate, the slow-moving annular plates are provided with slow-moving springs, and the slow-moving springs are in contact with the rotating connecting piece
Further, the fixing leg assembly comprises telescopic fixing legs arranged at four corners of the stable base plate.
The utility model adopts the fixed foot component which can be tightly matched with the ground to ensure the stability of the bracket. Through closely cooperating with ground, also can guarantee the stationarity of support under the ground condition of difference to guarantee the accuracy and the accuracy of survey and drawing better.
The utility model forms a firm surveying and mapping base frame through the cooperation of the three groups of stabilizing rods, the cross connecting components and other components, can ensure that a total station, other surveying and mapping instruments and the like are kept stable and motionless on fixed positions, and establishes the stable surveying and mapping base frame, thereby ensuring absolute precision and relative precision in the measuring process, and ensuring that the rotating components adopt the design of rotating seats and rotating pieces, so that the connection with the fixed rods is firmer.
The connecting frame piece and the stretching and telescoping component can connect the surveying and mapping base frame with the three groups of stabilizing rods, and the problem that the total station is interfered by various environments in the operation process to cause data measurement errors is avoided. The connecting mode can enable the total station to be effectively matched with the surveying and mapping base frame, and enable the surveying and mapping base frame to provide a reference plane for surveying and mapping instruments such as the total station in a stable state, so that accuracy of the surveying and mapping instruments and accuracy of key data are maintained.
Drawings
FIG. 1 is a schematic view of a three-dimensional mechanism at a first view angle according to the present utility model;
FIG. 2 is a schematic view of a three-dimensional mechanism at a second view angle according to the present utility model;
FIG. 3 is a schematic view of an enlarged structure at A of the present utility model;
FIG. 4 is a schematic view of an enlarged structure at B of the present utility model;
FIG. 5 is a schematic view of the enlarged structure of the present utility model at C;
wherein, the attached drawings are as follows: 1. stabilizing the substrate; 2. a foot fixing assembly; 3. a stabilizing rod; 4. a rotating assembly; 41. a rotating seat; 42. a rotating member; 5. rotating the connecting piece; 51. a connecting cylinder; 52. a connecting disc; 53. a connecting ball groove; 54. a connection unit; 541. a connecting frame; 542. a hydraulic rod is propped up; 543. a connecting frame member; 6. a cross-connect assembly; 61. a first connecting rod; 62. connecting the telescopic piece; 621. a hydraulic telescopic cylinder; 622. a buffer rod; 623. a buffer spring; 624. connecting the U-shaped frame; 63. a second connecting rod; 7. a horizontal connection assembly; 71. connecting ribs; 72. a telescopic hydraulic cylinder; 73. a shock-absorbing rod; 74. a damping spring; 75. a hinge bracket; 8. surveying and mapping the base frame; 81. a connecting rod; 82. a mapping frame; 83. a rotating disc; 9. stretching the telescopic assembly; 91. a stretching rod; 92. a shock-absorbing rod; 93. a damping spring; 94. and a shock absorption connecting frame.
Detailed Description
Referring to fig. 1 to 5, an auxiliary bracket for accurately positioning a polygonal mapping area comprises a stable base plate 1 arranged on the ground, wherein a foot fixing assembly 2 matched with the ground is arranged on the stable base plate 1, three groups of stable rods 3 are arranged on the stable base plate 1, and a rotating assembly 4 matched with the stable rods 3 is arranged on the stable base plate 1;
each group of stabilizing rods 3 is provided with a rotary connecting piece 5 at the top and bottom ends, a cross connecting component 6 matched with the rotary connecting piece 5 is arranged between every two adjacent stabilizing rods 3, a horizontal connecting component 7 matched with the cross connecting component 6 is arranged between every two adjacent stabilizing rods 3, a surveying and mapping base frame 8 is arranged between every three groups of stabilizing rods 3, connecting frame pieces 543 are respectively arranged at the top and bottom ends of the surveying and mapping base frame 8, and the connecting frame pieces 543 are respectively provided with a stretching and telescoping component 9 connected with each group of stabilizing rods 3.
Further, the rotating assembly 4 comprises a rotating seat 41 arranged on the stable substrate 1, a rotating groove is formed in the rotating seat 41, a rotating piece 42 matched with the stable rod 3 is arranged in the rotating groove, the rotating piece 42 comprises a clamping cylinder matched with the stable rod 3, a clamping screw is arranged in the clamping cylinder, and a rotating shaft matched with the rotating seat 41 is arranged on the clamping cylinder.
Further, the rotary connecting piece 5 comprises a connecting cylinder 51 sleeved on the stabilizing rod 3, a connecting disc 52 is coaxially arranged in the middle of the connecting cylinder 51, a plurality of connecting ball grooves 53 are formed in the two ends of the top and the bottom of the connecting disc 52, positioning screws matched with the stabilizing rod 3 are arranged on the connecting cylinder 51, and a connecting unit 54 matched with the cross connecting assembly 6 or the horizontal connecting assembly 7 or the stretching and retracting assembly 9 is arranged in the connecting ball grooves 53.
Further, the connection unit 54 includes a connection frame 541, a U-shaped groove matched with the connection disc 52 is formed in the connection frame 541, a propping hydraulic rod 542 matched with the connection ball groove 53 is disposed at two ends of the opening of the U-shaped groove, and a connection frame member matched with the cross connection assembly 6 or the horizontal connection assembly 7 or the stretching and retracting assembly 9 is rotatably connected to the connection frame 541.
Further, the cross connection assembly 6 comprises a first connection rod 61, connection telescopic members 62 matched with the rotation connection members 5 are respectively arranged at two ends of the first connection rod 61, the first connection rod 61 is connected with a second connection rod 63 in a rotation mode, grooves matched with the second connection rod 63 are formed in the first connection rod 61, and connection telescopic members 62 are respectively arranged at two ends of the second connection rod 63;
the connecting telescopic piece 62 comprises a hydraulic telescopic cylinder 621 which is arranged at the end part of the first connecting rod 61 or the second connecting rod 63 and is rotationally connected with the first connecting rod 61 or the second connecting rod 63, a buffer rod 622 is arranged at the telescopic end of the hydraulic telescopic cylinder 621, a buffer cavity matched with the buffer rod 622 is formed at the telescopic end of the hydraulic telescopic cylinder 621, a buffer spring 623 is arranged on the buffer rod 622, and a U-shaped connecting frame 624 matched with the rotating connecting piece 5 is arranged at the end part of the buffer rod 622.
The horizontal connecting assembly 7 comprises connecting ribs 71, telescopic hydraulic cylinders 72 are rotatably connected to the two ends of the connecting ribs 71, shock absorbing rods 73 are arranged at the moving ends of the telescopic hydraulic cylinders 72, shock absorbing cavities matched with the shock absorbing rods 73 are formed at the moving ends of the telescopic hydraulic cylinders 72, shock absorbing springs 74 are sleeved on the shock absorbing rods 73, and hinge frames 75 matched with the rotary connecting pieces 5 are arranged on the shock absorbing rods 73.
Further, survey and drawing bed frame 8 is including the survey and drawing frame 82 that is used for placing surveying and drawing instrument, and is provided with the spirit level on the survey and drawing frame 82, and the top end both ends of survey and drawing frame 82 do not rotate respectively and are connected with rolling disc 83, establish on the rolling disc 83 and evenly be provided with three group's link piece 543 along the circumference of rolling disc 83, and rotate link piece 5 and be located on the link piece 543.
Further, stretch telescopic assembly 9 includes stretch rod 91, and stretch rod 91's both ends department all rotates and is connected with stretch hydraulic stem, and stretch hydraulic stem's removal end department is provided with shock attenuation pole 92, stretch hydraulic stem's removal end department set up with shock attenuation pole 92 complex shock attenuation chamber, the cover is equipped with damping spring 93 on the shock attenuation pole 92, be provided with on the shock attenuation pole 92 with rotate connecting piece 5 complex shock attenuation link 94.
Further, the stabilizing rod 3 is sleeved with a slow-moving sleeve, the slow-moving sleeves are respectively provided with a slow-moving annular plate, a slow-moving spring is arranged on the slow-moving annular plate, and the slow-moving spring is contacted with the rotary connecting piece 5
Further, the fixing leg assembly 2 comprises telescopic fixing legs arranged at four corners of the stable base plate.
The working principle of the technical scheme is realized by combining a series of structural members with stability and adjustability based on mapping requirements. The stable base plate 1, the fixed leg assembly 2 and the stable rod 3 are used for supporting the whole mapping base frame 8, so that the stability of the whole mapping base frame is ensured; the rotating assembly 4 is used for realizing the rotation of a surveying instrument or measuring equipment so as to realize the measurement requirements of different angles; the cross connection assembly 6 and the horizontal connection assembly 7 are used for connecting a plurality of stabilizing rods 3, so that the structural stability of the whole surveying and mapping base frame 8 is ensured; the mapping pedestal 8 is used to carry measuring instruments and equipment and to transmit various measurement data. The flexibility and adjustability of the whole structure are embodied on the connecting frame 543 and the stretching and retracting assembly 9, and numerical adjustment can be carried out according to actual needs so as to adapt to different measurement requirements.
The technical features of the present utility model that are not described in the present utility model may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be within the scope of the present utility model by those skilled in the art.
Claims (10)
1. The utility model provides a polygon survey and drawing regional accurate positioning auxiliary stand which characterized in that: the novel ground-mounted foot fixing device comprises a stable base plate (1) arranged on the ground, wherein a foot fixing assembly (2) matched with the ground is arranged on the stable base plate (1), three groups of stable rods (3) are arranged on the stable base plate (1), and a rotating assembly (4) matched with the stable rods (3) is arranged on the stable base plate (1);
each group firm pole (3) top end both ends department all is provided with rotates connecting piece (5), and adjacent two be provided with between firm pole (3) with rotate connecting piece (5) complex cross-connect subassembly (6), and adjacent two be provided with between firm pole (3) with cross-connect subassembly (6) complex horizontal coupling subassembly (7), three groups be provided with survey and drawing bed frame (8) between firm pole (3), the top end both ends department of survey and drawing bed frame (8) all is provided with link spare (543), link spare (543) are provided with tensile expansion assembly (9) that are connected with firm pole (3) of each group respectively.
2. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the rotating assembly (4) comprises a rotating seat (41) arranged on the stable substrate (1), a rotating groove is formed in the rotating seat (41), a rotating piece (42) matched with the stable rod (3) is arranged in the rotating groove, the rotating piece (42) comprises a clamping cylinder matched with the stable rod (3), a clamping screw is arranged in the clamping cylinder, and a rotating shaft matched with the rotating seat (41) is arranged on the clamping cylinder.
3. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the rotary connecting piece (5) comprises a connecting cylinder (51) sleeved on the stabilizing rod (3), a connecting disc (52) is coaxially arranged in the middle of the connecting cylinder (51), a plurality of connecting ball grooves (53) are formed in the two ends of the top and the bottom of the connecting disc (52), positioning screws matched with the stabilizing rod (3) are arranged on the connecting cylinder (51), and connecting units (54) matched with the cross connecting assembly (6) or the horizontal connecting assembly (7) or the stretching and telescoping assembly (9) are arranged in the connecting ball grooves (53).
4. A polygonal survey area precision positioning aid as claimed in claim 3, wherein: the connecting unit (54) comprises a connecting frame (541), a U-shaped groove matched with the connecting disc (52) is formed in the connecting frame (541), supporting hydraulic rods (542) matched with the connecting ball grooves (53) are arranged at two ends of an opening of the U-shaped groove, and connecting frames (541) are rotatably connected with connecting frame (541) matched with the cross connecting assembly (6) or the horizontal connecting assembly (7) or the stretching and stretching assembly (9).
5. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the cross connection assembly (6) comprises a first connecting rod (61), two ends of the first connecting rod (61) are respectively matched with a connecting telescopic piece (62) matched with the rotating connecting piece (5), the first connecting rod (61) is rotationally connected with a second connecting rod (63), grooves matched with the second connecting rod (63) are formed in the first connecting rod (61), and the connecting telescopic pieces (62) are respectively arranged at two ends of the second connecting rod (63);
the connecting telescopic piece (62) is in including setting up head rod (61) or second connecting rod (63) tip, and with head rod (61) or second connecting rod (63) rotate hydraulic telescoping tube (621) of being connected, the flexible end department of hydraulic telescoping tube (621) is provided with buffer rod (622), just the flexible end of hydraulic telescoping tube (621) seted up with buffer rod (622) complex buffer chamber, just be provided with buffer spring (623) on buffer rod (622), the tip of buffer rod (622) be provided with rotate connecting piece (5) complex connection U type frame (624).
6. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the horizontal connecting assembly (7) comprises a connecting rib (71), telescopic hydraulic cylinders (72) are rotationally connected to two ends of the connecting rib (71), shock absorbing rods (73) are arranged at moving ends of the telescopic hydraulic cylinders (72), shock absorbing cavities matched with the shock absorbing rods (73) are formed in moving ends of the telescopic hydraulic cylinders (72), shock absorbing springs (74) are sleeved on the shock absorbing rods (73), and hinge brackets (75) matched with the rotating connecting pieces (5) are arranged on the shock absorbing rods (73).
7. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: survey and drawing bed frame (8) are including being used for placing surveying and mapping instrument's survey and drawing frame (82), just be provided with the spirit level on survey and drawing frame (82), the top end both ends of survey and drawing frame (82) do not rotate respectively and are connected with rolling disc (83), establish on rolling disc (83) follow the circumference of rolling disc (83) evenly is provided with three group's link spare (543), just rotate link (5) and be located on link spare (543).
8. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the stretching and telescoping assembly (9) comprises a stretching rod (91), both ends of the stretching rod (91) are rotationally connected with a stretching hydraulic rod, a shock absorption rod (92) is arranged at the moving end of the stretching hydraulic rod, a shock absorption cavity matched with the shock absorption rod (92) is formed at the moving end of the stretching hydraulic rod, a shock absorption spring (93) is sleeved on the shock absorption rod (92), and a shock absorption connecting frame (94) matched with the rotating connecting piece (5) is arranged on the shock absorption rod (92).
9. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the stabilizing rod (3) is sleeved with a slow-moving sleeve, the slow-moving sleeves are respectively provided with a slow-moving annular plate, slow-moving springs are arranged on the slow-moving annular plates, and the slow-moving springs are in contact with the rotating connecting piece (5).
10. A polygonal survey area precision positioning aid as claimed in claim 1, wherein: the fixed leg assembly (2) comprises telescopic fixed legs arranged at four corners of the stable base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321578065.5U CN220320740U (en) | 2023-06-20 | 2023-06-20 | Accurate positioning auxiliary support for polygonal mapping area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321578065.5U CN220320740U (en) | 2023-06-20 | 2023-06-20 | Accurate positioning auxiliary support for polygonal mapping area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220320740U true CN220320740U (en) | 2024-01-09 |
Family
ID=89413509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321578065.5U Active CN220320740U (en) | 2023-06-20 | 2023-06-20 | Accurate positioning auxiliary support for polygonal mapping area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220320740U (en) |
-
2023
- 2023-06-20 CN CN202321578065.5U patent/CN220320740U/en active Active
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