CN219142150U - Vehicle-mounted millimeter wave radar air tightness test equipment - Google Patents
Vehicle-mounted millimeter wave radar air tightness test equipment Download PDFInfo
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- CN219142150U CN219142150U CN202223359773.8U CN202223359773U CN219142150U CN 219142150 U CN219142150 U CN 219142150U CN 202223359773 U CN202223359773 U CN 202223359773U CN 219142150 U CN219142150 U CN 219142150U
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- conveying belt
- carrier
- workbench
- air tightness
- millimeter wave
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The utility model relates to vehicle-mounted millimeter wave radar air tightness testing equipment, which belongs to the technical field of seal detection and comprises a workbench, a radar body, a carrier, a first conveying belt, a code sweeping component, a second conveying belt, a clamping component and a leakage detection component.
Description
Technical Field
The utility model belongs to the technical field of seal detection, and particularly relates to vehicle-mounted millimeter wave radar air tightness test equipment.
Background
The vehicle millimeter wave radar is a detection radar with a detection frequency domain between 30 and 300GHz, can distinguish and identify very small targets, can simultaneously identify a plurality of targets, and has imaging capability, small volume, good maneuverability and concealment. The vehicle millimeter wave radar is widely applied to the field of new energy automobiles, therefore, the vehicle millimeter wave radar needs more excellent waterproof performance to maintain the normal operation of the automobile, the waterproof performance is generally embodied by the air tightness of products, the vehicle millimeter wave radar is generally provided with mounting holes communicated to the inside, when the air tightness of the existing vehicle millimeter wave radar is detected, the products are mostly installed in the detection cavity through the mounting holes manually, whether air overflows from the mounting holes to judge the air tightness of the vehicle millimeter wave radar is detected, and the manual installation consumes manpower.
Disclosure of Invention
The utility model provides vehicle-mounted millimeter wave radar air tightness testing equipment which is used for solving the technical problem that the existing air tightness detection consumes manpower.
The utility model is realized by the following technical scheme: an in-vehicle millimeter wave radar air tightness test device, comprising:
a work table;
the radar comprises a radar body, wherein a mounting hole is formed in the bottom wall of the radar body;
the carrier is provided with a fixing pipe in a penetrating manner, the fixing pipe is inserted in the mounting hole in a sealing manner, and the inside of the radar body is communicated with the lower part of the carrier through the fixing pipe;
the first conveying belt is arranged on the workbench and is used for conveying the carrier;
the code scanning component is arranged on the workbench and is positioned above the first conveying belt and used for determining the information of the radar body;
the second conveying belt is arranged on the workbench, and the second conveying belt and the first conveying belt are respectively arranged on two sides of the workbench surface;
the clamping assembly is arranged on the workbench, one end of the clamping assembly is positioned above the first conveying belt, the other end of the clamping assembly is positioned above the second conveying belt, and the clamping assembly is used for moving the carrier;
and the leak detection assembly is arranged above the first conveying belt and is used for measuring the air tightness of the radar body.
Optionally, in order to better implement the present utility model, the number of the leak detection assemblies is two, the two leak detection assemblies are separately arranged at two sides of the clamping assembly, and the two leak detection assemblies are both located above the second conveying belt.
Optionally, in order to better implement the present utility model, the leak detection assembly includes:
one end of the support column is arranged on the workbench, the other end of the support column extends upwards, and the support columns are positioned on two sides of the second conveying belt;
the top plate is arranged at one end, far away from the workbench, of the supporting column and is positioned above the second conveying belt;
the telescopic cylinder comprises a fixed end and a telescopic end, the fixed end of the telescopic cylinder is arranged on the top plate, and the telescopic end of the telescopic cylinder extends downwards;
the mounting block is mounted at the telescopic end of the telescopic cylinder;
the mounting plate is mounted on the mounting block and is positioned above the second conveying belt;
one end of the sealing cover is arranged on the bottom wall of the mounting plate, the other end of the sealing cover extends downwards, the sealing cover is arranged on the carrier, and a leakage detection space is formed among the mounting plate, the sealing cover and the carrier;
the air inlet pipe is arranged on the sealing cover and communicated with the inside of the sealing cover.
Optionally, in order to better implement the present utility model, a guide hole is formed on the mounting plate, and the support column is slidably inserted into the guide hole.
Optionally, in order to better implement the present utility model, the scan code component includes:
one end of the supporting plate is arranged on the workbench, the other end of the supporting plate extends upwards, and the supporting plate is positioned on one side of the first conveying belt;
the placing table is arranged at one end, far away from the workbench, of the supporting plate;
the camera is installed place the bench, be provided with the code on the radar body, the camera is used for taking a picture discernment the code.
Optionally, in order to better implement the present utility model, the gripping assembly includes:
the support frame is arranged on the workbench, one end of the support frame is positioned above the first conveying belt, and the other end of the support frame is positioned above the second conveying belt;
the first sliding block is arranged on the support frame and is slidably arranged in the first sliding groove;
the first sliding block is provided with a first sliding groove, the first sliding groove is perpendicular to the first sliding groove, and the first sliding block is arranged in the first sliding groove in a sliding way;
the lifting cylinder comprises a fixed end and a lifting end, the fixed end of the lifting cylinder is arranged on the second sliding block, and the lifting end of the lifting cylinder extends downwards;
the clamping jaw is arranged at the lifting end of the lifting cylinder and is used for clamping the carrier.
Optionally, to better implement the present utility model, further includes:
the first sealing ring is arranged on the fixed pipe, and the outer wall of the mounting hole is abutted against the first sealing ring;
the second sealing ring is arranged at one end, far away from the mounting plate, of the sealing cover, the second sealing ring is abutted to the upper surface of the carrier, and the second sealing ring is used for sealing the leak detection space.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides vehicle-mounted millimeter wave radar air tightness testing equipment which comprises a workbench, a radar body, a carrier, a first conveying belt, a code scanning component, a second conveying belt, a clamping component and a leak detection component, wherein a mounting hole is formed in the bottom wall of the radar body, a fixing pipe is mounted on the carrier and is inserted in the mounting hole in a sealing manner, the radar body is communicated with the lower part of the carrier through the fixing pipe, the first conveying belt is mounted on the workbench, the first conveying belt is used for conveying the carrier, the code scanning component is mounted on the workbench, the code scanning component is located above the first conveying belt, the code scanning component is used for determining information of the radar body, the second conveying belt is mounted on the workbench, the second conveying belt and the first conveying belt are respectively arranged on two sides of the workbench, the clamping component is mounted on the workbench, one end of the clamping component is located above the first conveying belt, the other end of the clamping component is located above the second conveying belt, the clamping component is used for moving the carrier, the leak detection component is mounted above the first conveying belt, and the leak detection component is used for measuring air tightness of the radar body. Thus, the radar body is arranged on the carrier, the scanning component is positioned above the first conveying belt, the clamping component clamps the carrier on the first conveying belt to the second conveying belt, the carrier is conveyed to the leak detection component by the second conveying belt, and the leak detection component and the carrier cooperate to measure the air tightness of the radar body.
Through the structure, the vehicle-mounted millimeter wave radar air tightness testing equipment provided by the utility model solves the technical problem that the existing air tightness detection consumes manpower. Specifically, the radar body is installed on the carrier, the inside of radar body is linked together with the diapire of carrier, sweep the radar body on the code component discernment carrier, the subassembly is got to clamp and remove the radar body after discernment to the second conveyer belt on, the second conveyer belt drives the carrier, make the radar body reach under the leak hunting subassembly, leak hunting subassembly work, leak hunting subassembly and the sealed radar body place region formation detection space of carrier, when radar body gas tightness is not good, the gas gets into the radar body, and discharge downwards by the fixed pipe on the carrier, this gas tightness test equipment is through independently discernment radar body, and carry out gas tightness detection with radar body to target position, so, this equipment is through automatic identification, automatic feeding, automated inspection is in order to realize the gas tightness detection of on-vehicle millimeter radar, moreover, the steam generator is rational in infrastructure, the practicality is strong.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an air tightness test device for a vehicle-mounted millimeter wave radar according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a leak detection assembly according to an embodiment of the present utility model;
FIG. 3 is another schematic view of a leak detection assembly according to an embodiment of the utility model;
FIG. 4 is a schematic view of a gripping assembly according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a code scanning assembly according to an embodiment of the present utility model;
fig. 6 is a schematic view of the structure of the hood in the embodiment of the present utility model.
In the figure: 1-a workbench; 2-a radar body; 3-carrier; 4-a first conveyor belt; 5-code scanning assembly; 51-supporting plates; 52-placing a table; 53-camera; 6-a second conveyor belt; 7-clamping the component; 71-a supporting frame; 72-a first slider; 73-a second slider; 74-lifting cylinder; 75-clamping jaw; 8-a leak detection assembly; 81-supporting columns; 82-top plate; 83-a telescopic cylinder; 84-mounting blocks; 85-mounting plates; 86-sealing cover; 87-air inlet pipe; 9-hood.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.
Examples
The embodiment provides vehicle-mounted millimeter wave radar air tightness testing equipment, which is used for solving the technical problem that the existing air tightness detection consumes manpower. This gas tightness test equipment includes workstation 1, radar body 2, carrier 3, first conveyer belt 4, sweeps a yard subassembly 5, second conveyer belt 6, presss from both sides and gets subassembly 7 and leak hunting subassembly 8, wherein:
the bottom of workstation 1 is equipped with the universal wheel, and the universal wheel helps removing this on-vehicle millimeter wave radar gas tightness test equipment, still is equipped with aircraft bonnet 9 on the workstation 1, and aircraft bonnet 9 is used for protecting the equipment on the workstation 1.
The mounting hole has been seted up on the diapire of radar body 2, and the mounting hole communicates to the inside of radar body 2, and the mounting hole is used for installing radar body 2 in the setting position of car, and after the installation, the mounting hole is installed the work piece shutoff.
The carrier 3 is internally provided with a fixing pipe in a penetrating manner, the fixing pipe is inserted in the mounting hole in a sealing manner, the radar body 2 is communicated with the lower portion of the carrier 3 through the fixing pipe, in particular, the carrier 3 is internally provided with a mounting groove in a penetrating manner, the fixing pipe is welded in the mounting groove, the mounting hole is sleeved on the fixing pipe, and the connecting position of the mounting hole and the fixing pipe is sealed, so that the radar body 2 is communicated with one end, far away from the fixing pipe, of the carrier 3.
The first conveyer belt 4 is installed on workstation 1, and first conveyer belt 4 is used for carrying carrier 3, specifically is equipped with microcontroller in the workstation 1, and microcontroller's model is STM32 singlechip, and first conveyer belt 4 passes through servo motor and drives, and microcontroller controls servo motor's rotation angle in order to accurate control first conveyer belt 4's stroke.
The code scanning component 5 is arranged on the workbench 1, the code scanning component 5 is located above the first conveying belt 4, the code scanning component 5 is used for determining information of the radar body 2, the code scanning component 5 is electrically connected with the micro-controller, and the micro-controller records information corresponding to the radar body 2 so as to facilitate subsequent rejection of products with poor air tightness.
The second conveyer belt 6 is installed on the workstation 1, and second conveyer belt 6 and first conveyer belt 4 divide to establish in the both sides of workstation 1 face, and second conveyer belt 6 passes through servo motor drive, and this servo motor is connected with microcontroller electricity.
The clamping assembly 7 is installed on the workbench 1, one end of the clamping assembly 7 is located above the first conveying belt 4, the other end of the clamping assembly 7 is located above the second conveying belt 6, the clamping assembly 7 is used for moving the carrier 3, and specifically, the micro controller controls the clamping assembly 7 to clamp the carrier 3 on the first conveying belt 4 to the second conveying belt 6.
The leak detection assembly 8 is arranged above the first conveying belt 4, the leak detection assembly 8 is used for measuring the air tightness of the radar body 2, and the leak detection assembly 8 is electrically connected with the micro-controller.
Through above-mentioned structure, the on-vehicle millimeter wave radar gas tightness test equipment that this embodiment provided has solved current gas tightness and has detected the technical problem who consumes the manpower. Specifically, the radar body 2 is installed on the carrier 3, the inside of the radar body 2 is communicated with the bottom wall of the carrier 3, the code scanning assembly 5 identifies the radar body 2 on the carrier 3, the clamping assembly 7 moves the identified radar body 2 to the second conveying belt 6, the second conveying belt 6 drives the carrier 3, the radar body 2 arrives under the leak detection assembly 8, the leak detection assembly 8 works, the leak detection assembly 8 and the carrier 3 seal the area where the radar body 2 is located, when the air tightness of the radar body 2 is poor, air enters the radar body 2 and is discharged downwards through the fixing tube on the carrier 3, the air tightness testing device automatically identifies the radar body 2 and conveys the radar body 2 to a target position for air tightness detection, and therefore the device realizes air tightness detection of the vehicle-mounted millimeter radar through automatic identification, automatic feeding and automatic detection, and has a novel structure.
An alternative implementation of this embodiment is as follows: the number of the leak detection assemblies 8 is two, the two leak detection assemblies 8 are respectively arranged on two sides of the clamping assembly 7, the two leak detection assemblies 8 are located above the second conveying belt 6, specifically, the leak detection assemblies 8 are located on two sides of the clamping assembly 7, one leak detection assembly 8 clamps another carrier 3 with the radar body 2 onto the second conveying belt 6 when the air tightness is detected by the clamping assembly 7, after the detection is completed, the detected carrier 3 moves to the lower side of the clamping assembly 7, and the other carrier 3 moves to the other leak detection assembly 8 to detect the air tightness of the radar body 2.
Alternatively, the leak detection assembly 8 includes a support column 81, a top plate 82, a telescopic cylinder 83, a mounting block 84, a mounting plate 85, a seal cover 86, and an air intake pipe 87, one end of the support column 81 is mounted on the table 1, the other end extends upward, the support column 81 is located at both sides of the second conveyor belt 6, the top plate 82 is mounted at an end of the support column 81 remote from the table 1, the top plate 82 is located above the second conveyor belt 6, the telescopic cylinder 83 includes a fixed end and a telescopic end, the fixed end of the telescopic cylinder 83 is mounted on the top plate 82, the telescopic end of the telescopic cylinder 83 extends downward, the mounting block 84 is mounted at the telescopic end of the telescopic cylinder 83, the mounting block 84 is used for buffering the pressure between the mounting plate 85 and the telescopic cylinder 83, the mounting plate 85 is mounted on the mounting block 84, the mounting plate 85 is located above the second conveyor belt 6, one end of the seal cover 86 is mounted on the bottom wall of the mounting plate 85, the other end extends downwards, the seal cover 86 covers on the carrier 3, form the leak hunting space between mounting panel 85, seal cover 86, carrier 3, intake pipe 87 installs on seal cover 86, intake pipe 87 is linked together with the inside of seal cover 86, specifically, seal cover 86 seals and installs on the diapire of mounting panel 85, telescopic cylinder 83 control seal cover 86 moves down in order to seal up when cover 86 is established on carrier 3, the internal pressure in leak hunting space is up to certain value to the intake pipe 87 afterwards, then stop the air entrainment, wait to observe the internal pressure variation in leak hunting space, if its internal pressure variation is within the error range, then judge the gas tightness of this radar body 2 is good, obviously, leak hunting space itself sealing performance is good, so as to reduce the influence of self seal to the detection.
More preferably, the mounting plate 85 is provided with a guide hole, and the support column 81 is slidably inserted into the guide hole, so that the sealing cover 86 and the carrier 3 are matched more stably.
An alternative implementation of this embodiment is as follows: the scanning module 5 comprises a supporting plate 51, a placing table 52 and a camera 53, wherein one end of the supporting plate 51 is installed on the workbench 1, the other end of the supporting plate extends upwards, the supporting plate 51 is located on one side of a first conveying belt, the placing table 52 is installed at one end, far away from the workbench 1, of the supporting plate 51, the camera 53 is installed on the placing table 52, the radar body 2 is provided with codes, the camera 53 is used for shooting identification codes, the camera 53 is electrically connected with the micro-controller, the micro-controller records the codes of the radar body 2, and timely records when poor air tightness of the radar body 2 is detected, so that problem products can be removed conveniently.
An alternative implementation of this embodiment is as follows: the clamping assembly 7 comprises a supporting frame 71, a first sliding block 72, a second sliding block 73, a lifting air cylinder 74 and a clamping jaw 75, wherein the supporting frame 71 is arranged on the workbench 1, one end of the supporting frame 71 is located above the first conveying belt 4, the other end of the supporting frame 71 is located above the second conveying belt 6, a first sliding groove is formed in the supporting frame 71, the first sliding block 72 is slidably arranged in the first sliding groove, a second sliding groove is formed in the first sliding block 72, the second sliding groove is perpendicular to the first sliding groove, the second sliding block 73 is slidably arranged in the second sliding groove, the lifting air cylinder 74 comprises a fixed end and a lifting end, the fixed end of the lifting air cylinder 74 is arranged on the second sliding block 73, the lifting end of the lifting air cylinder 74 extends downwards, the clamping jaw 75 is arranged at the lifting end of the lifting air cylinder 74, the clamping jaw 75 is used for clamping the carrier 3, and the first sliding block 72 and the second sliding block 73 are controlled to move by different linear motors respectively, and the linear motors, the lifting air cylinder 74 and the clamping jaw 75 are electrically connected with a uniform micro controller.
An alternative implementation of this embodiment is as follows: the air tightness detection device further comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged on the fixed pipe, the outer wall of the mounting hole is abutted to the first sealing ring, the second sealing ring is arranged at one end, far away from the mounting plate 85, of the sealing cover 86, the second sealing ring is abutted to the upper surface of the carrier 3, and the second sealing ring is used for sealing a leakage detection space, so that the tightness of the leakage detection space is higher, and the interference of air tightness detection on the radar body 2 is smaller.
The above description is merely an embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present utility model, and it is intended to cover the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (7)
1. The vehicle-mounted millimeter wave radar air tightness test device is characterized by comprising:
a work table;
the radar comprises a radar body, wherein a mounting hole is formed in the bottom wall of the radar body;
the carrier is provided with a fixing pipe in a penetrating manner, the fixing pipe is inserted in the mounting hole in a sealing manner, and the inside of the radar body is communicated with the lower part of the carrier through the fixing pipe;
the first conveying belt is arranged on the workbench and is used for conveying the carrier;
the code scanning component is arranged on the workbench and is positioned above the first conveying belt and used for determining the information of the radar body;
the second conveying belt is arranged on the workbench, and the second conveying belt and the first conveying belt are respectively arranged on two sides of the workbench surface;
the clamping assembly is arranged on the workbench, one end of the clamping assembly is positioned above the first conveying belt, the other end of the clamping assembly is positioned above the second conveying belt, and the clamping assembly is used for moving the carrier;
and the leak detection assembly is arranged above the first conveying belt and is used for measuring the air tightness of the radar body.
2. The vehicle millimeter wave radar air tightness test device according to claim 1, wherein the number of the leakage detection assemblies is two, the two leakage detection assemblies are respectively arranged at two sides of the clamping assembly, and the two leakage detection assemblies are both positioned above the second conveying belt.
3. The vehicle millimeter wave radar air tightness test apparatus according to claim 2, wherein said leak detection assembly comprises:
one end of the support column is arranged on the workbench, the other end of the support column extends upwards, and the support columns are positioned on two sides of the second conveying belt;
the top plate is arranged at one end, far away from the workbench, of the supporting column and is positioned above the second conveying belt;
the telescopic cylinder comprises a fixed end and a telescopic end, the fixed end of the telescopic cylinder is arranged on the top plate, and the telescopic end of the telescopic cylinder extends downwards;
the mounting block is mounted at the telescopic end of the telescopic cylinder;
the mounting plate is mounted on the mounting block and is positioned above the second conveying belt;
one end of the sealing cover is arranged on the bottom wall of the mounting plate, the other end of the sealing cover extends downwards, the sealing cover is arranged on the carrier, and a leakage detection space is formed among the mounting plate, the sealing cover and the carrier;
the air inlet pipe is arranged on the sealing cover and communicated with the inside of the sealing cover.
4. The vehicle-mounted millimeter wave radar air tightness test device according to claim 3, wherein the mounting plate is provided with a guide hole, and the support column is slidably inserted into the guide hole.
5. The vehicle millimeter wave radar air tightness test apparatus according to claim 1, wherein said code scanning component comprises:
one end of the supporting plate is arranged on the workbench, the other end of the supporting plate extends upwards, and the supporting plate is positioned on one side of the first conveying belt;
the placing table is arranged at one end, far away from the workbench, of the supporting plate;
the camera is installed place the bench, be provided with the code on the radar body, the camera is used for taking a picture discernment the code.
6. The vehicle millimeter wave radar air tightness test apparatus according to claim 1, wherein said clamping assembly comprises:
the support frame is arranged on the workbench, one end of the support frame is positioned above the first conveying belt, and the other end of the support frame is positioned above the second conveying belt;
the first sliding block is arranged on the support frame and is slidably arranged in the first sliding groove;
the first sliding block is provided with a first sliding groove, the first sliding groove is perpendicular to the first sliding groove, and the first sliding block is arranged in the first sliding groove in a sliding way;
the lifting cylinder comprises a fixed end and a lifting end, the fixed end of the lifting cylinder is arranged on the second sliding block, and the lifting end of the lifting cylinder extends downwards;
the clamping jaw is arranged at the lifting end of the lifting cylinder and is used for clamping the carrier.
7. A vehicle-mounted millimeter wave radar air tightness test apparatus according to claim 3, further comprising:
the first sealing ring is arranged on the fixed pipe, and the outer wall of the mounting hole is abutted against the first sealing ring;
the second sealing ring is arranged at one end, far away from the mounting plate, of the sealing cover, the second sealing ring is abutted to the upper surface of the carrier, and the second sealing ring is used for sealing the leak detection space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223359773.8U CN219142150U (en) | 2022-12-12 | 2022-12-12 | Vehicle-mounted millimeter wave radar air tightness test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223359773.8U CN219142150U (en) | 2022-12-12 | 2022-12-12 | Vehicle-mounted millimeter wave radar air tightness test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219142150U true CN219142150U (en) | 2023-06-06 |
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ID=86596162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223359773.8U Active CN219142150U (en) | 2022-12-12 | 2022-12-12 | Vehicle-mounted millimeter wave radar air tightness test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219142150U (en) |
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2022
- 2022-12-12 CN CN202223359773.8U patent/CN219142150U/en active Active
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