Dual-light intelligent flying platform capable of reducing wind resistance
By setting up a hexagonal low-drag extendable arm and a wind pressure sensor on the drone flight platform, the airflow is broken and the direction of the airflow is guided, which solves the problem of increased wind resistance caused by conventional cylindrical extendable wings and improves flight speed and stability.
Patent Information
- Application Number
- CN202423200617.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
The extending wings installed on the flight platform of existing UAVs are conventional cylindrical structures, which increases wind resistance and affects flight speed.
A low-drag extendable arm with a hexagonal cross-section is installed on the flight platform to break up the airflow and guide its direction. Ventilation openings are installed to reduce weight, and wind pressure sensors are installed inside the extendable arm to work with the control center to adjust wind resistance in real time to control flight speed.
By reducing wind resistance, increasing flight speed and stability, adapting to different wind resistance environments, and achieving intelligent control.
Smart Images

Figure CN223479373U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dual-light unmanned aerial vehicle (UAV) technology, and in particular to a dual-light intelligent flight platform that reduces wind resistance. Background Technology
[0002] Application CN202322456930.5 discloses an inspection drone with a dual-light camera mount structure. The drone has a pod-type dual-light camera mounted below the flight platform and drives a motor to rotate it circumferentially and radially, realizing the functions of drone cruising and camera storage. However, during the cruising process, the conventional cylindrical structure of the extended wings mounted on the flight platform of the drone increases wind resistance during flight, which is not conducive to fast flight. Utility Model Content
[0003] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.
[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a dual-light intelligent flight platform with reduced wind resistance. By setting a low-drag extension arm with a hexagonal cross-section on the flight platform body, the surface in contact with the airflow is changed from a conventional arc surface to a sloping surface, breaking the airflow and guiding its direction, thereby reducing wind resistance and increasing flight speed. The low-drag extension arm is also equipped with a ventilation port, which reduces the overall weight while facilitating airflow passage, thereby increasing flight speed. The low-drag extension arm is also equipped with a wind pressure sensor to detect wind speed. After cooperating with the control center, the current wind resistance can be detected to determine whether the low-drag extension arm should be turned and the turning angle, thereby controlling the current speed of the flight platform by adjusting the wind resistance.
[0005] This utility model provides a dual-light intelligent flight platform with reduced wind resistance, including a flight platform body with a dual-light pod camera at the bottom, low-drag flight wings arranged in a ring at intervals on the side of the flight platform body, and a wind pressure measurement component installed in the low-drag flight wings.
[0006] The low-drag flight wing includes a lift rotor and a low-drag extension arm. The wind pressure measurement component is located inside the low-drag extension arm. One end of the low-drag extension arm is connected to the lift rotor, and the other end of the low-drag extension arm is rotatably connected to the flight platform body. The low-drag extension arm has a hexagonal cross-section and is provided with ventilation openings spaced apart on the low-drag extension arm.
[0007] The low-drag flight wing, arranged in a ring on the flight platform body, is used to drive the flight platform for takeoff and landing. The wind pressure measurement component is used to detect the current wind speed and is connected to the control center inside the flight platform body to determine whether the low-drag extension arm is rotating and the rotation angle. The elevator rotor on the low-drag flight wing and the internal structure of the flight platform can refer to existing technology and will not be elaborated here. The low-drag extension arm is set with a hexagonal cross section, so that the surface in contact with the airflow changes from a conventional arc surface to a slope surface, which breaks the airflow and guides the direction of the airflow, thereby reducing wind resistance and increasing flight speed. The low-drag extension arm is also equipped with a ventilation port, which reduces the overall weight and facilitates the passage of airflow, thereby increasing flight speed.
[0008] In some embodiments, the flight platform body has an interface extending outward from its side. A rotating motor is housed within this interface, and the rotating shaft of the motor has a threaded end that extends outward. The interface protects the rotating shaft. The rotating motor and shaft within the interface drive the low-drag extension arm connected to it to rotate, causing different faces of the hexagon to face forward. This adjusts the flight speed according to different wind resistance conditions. When the two angled faces of the hexagonal low-drag extension arm face forward, it helps to break through the airflow, resulting in the highest flight speed. However, this also leads to a slower and less stable flight, making it unsuitable for complex airflow environments. When encountering complex airflow environments such as strong winds or unstable airflow, rotating the low-drag extension arm to face forward increases wind resistance and improves flight stability.
[0009] In some embodiments, the low-drag extension arm is hollow inside, and a threaded interface is provided at the end of the low-drag extension arm that connects to the flight platform body. The end of the rotating shaft is screwed into the threaded interface. The hollow interior of the low-drag extension arm reduces the overall weight while providing space for the installation of wind pressure measurement components. The threaded interface is used to mate with the rotating shaft, and the low-drag extension arm connected through the threaded interface can be quickly disassembled and installed.
[0010] In some embodiments, the ventilation openings are spaced apart on the four inclined surfaces of the low-drag extendable arm, with four openings forming a group and arranged in a ring on the low-drag extendable arm. The inner cavity of the low-drag extendable arm communicates with the outside through these ventilation openings. The ring-shaped arrangement of the ventilation openings facilitates airflow and, in conjunction with the inclined surfaces of the low-drag extendable arm, increases flight speed. Correspondingly, an internally installed wind pressure measuring component can detect the wind resistance experienced by the extendable arm through these ventilation openings. Preferably, the wind pressure measuring component is located on the ventilation opening group in the middle section of the low-drag extendable arm.
[0011] In some embodiments, the wind pressure measurement assembly includes a central shaft and four wind pressure sensors arranged in a ring on the central shaft. Each wind pressure sensor has a detection end, which faces outward and corresponds to a vent arranged in a ring on the low-drag extension arm. The central shaft is used to fix the four wind pressure sensors, which correspond to the vents to detect wind resistance. It should be understood that the specific fixing method of the wind pressure measurement assembly in the low-drag extension arm is not limited here. The wind pressure measurement assembly can be fixed inside the low-drag extension arm by adhesive, magnetic attraction, or snap-fit, and the wind pressure sensors can be connected to the vents. The fact that the specific fixing method is not described here does not mean that the wind pressure measurement assembly is not fixed inside the low-drag extension arm or lacks necessary technical features.
[0012] In some embodiments, both the mating interface and the threaded interface are provided with wiring slots, and the two wiring slots are positioned opposite each other. The wiring slots are slots reserved for the connection line between the wind pressure measurement component and the control center. The slots are opened along the curvature of the mating interface and the threaded interface, so as not to affect their connection.
[0013] In some embodiments, the flight platform body extends downward to provide a loading bracket, on which a protective storage shell is provided. A first rotating shaft is rotatably connected within the protective storage shell via bearings. A first helical gear is provided on the outer side of the first rotating shaft, and a hinge block is connected to the lower end of the first rotating shaft. The protective storage shell is used to house the dual-light pod camera, the first rotating shaft connected by bearings allows it to rotate, and the hinge block is used to connect the dual-light pod camera.
[0014] In some embodiments, the dual-light pod camera is rotatably connected to the hinge block, and a first drive motor is provided on the protective storage shell. A drive helical gear is provided on the drive shaft of the first drive motor, and the drive helical gear meshes with the first helical gear. The first drive motor is used to drive the helical gear to rotate, thereby causing the first helical gear to rotate and making the dual-light pod camera rotate circumferentially. The specific structure of the flight platform body can be referred to the background art documents, and is only briefly described here.
[0015] In some embodiments, a control center is also included, which is disposed within the flight platform body. A connecting wire is provided on the wind pressure measurement component, passing through the wiring slot and connecting to the control center. The first drive motor and the rotary motor are electrically connected to the control center. The control center is used to control the flight of the flight platform, receive and analyze measurement data from the wind pressure measurement component, thereby controlling the rotation angle of the rotary motor to achieve intelligent control of the low-drag extension arm and modify the flight speed. It should be understood that the specific coordination between wind pressure data and rotation angle can be obtained by those skilled in the art through calculation and multiple experiments. Accordingly, the intelligent control program involves software components, which are well known to those skilled in the art and will not be described in detail here.
[0016] By adopting the above technical solution, the beneficial effects of this utility model are:
[0017] This invention features a low-drag extension arm with a hexagonal cross-section mounted on the flight platform. This transforms the surface in contact with the airflow from a conventional curved surface to a sloping surface, breaking up the airflow and guiding its direction. This reduces drag and increases flight speed. The low-drag extension arm also has ventilation openings, which reduce overall weight while facilitating airflow passage, thereby increasing flight speed. Furthermore, the low-drag extension arm is equipped with a wind pressure sensor to detect wind speed. In conjunction with the control center, the current wind resistance can be detected to determine whether the low-drag extension arm should be turned and the turning angle, thus controlling the flight platform's current speed by adjusting the wind resistance.
[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.
[0019] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.
[0020] To make the above and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0022] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the overall structure of the flight platform in some embodiments of this utility model;
[0025] Figure 2 This is a schematic diagram of the connection structure between the low wind resistance extension arm and the interface in some embodiments of this utility model;
[0026] Figure 3 This is a cross-sectional schematic diagram of the connection structure between the low wind resistance extension arm and the docking interface in some embodiments of this utility model.
[0027] Figure 4 This is a cross-sectional schematic diagram of the wind pressure measuring component and the low wind resistance extension arm in some embodiments of the present invention;
[0028] Figure 5 This is a schematic diagram of the specific structure of the dual-light pod camera in some embodiments of this utility model.
[0029] Explanation of key figure labels:
[0030] 1. Flight platform body;
[0031] 11. Connect the interface; 12. Rotate the motor;
[0032] 2. Dual-light pod camera;
[0033] 3. Low-drag flight wing;
[0034] 31. Elevating rotor;
[0035] 32. Low wind resistance extension arm;
[0036] 321. Threaded interface; 322. Ventilation opening;
[0037] 4. Wind pressure measurement component;
[0038] 41. Central shaft; 42. Wind pressure sensor;
[0039] 5. Wiring trough;
[0040] 6. Loading bracket;
[0041] 7. Protective storage case;
[0042] 71. First rotating shaft; 72. First helical gear; 73. Hinge block;
[0043] 8. First drive motor. Detailed Implementation
[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.
[0045] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0047] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] Reference Figure 1-2 , Figure 1This is a schematic diagram of the overall structure of the flight platform in some embodiments of this utility model; Figure 2 This is a schematic diagram of the connection structure between the low-drag extension arm and the interface in some embodiments of this utility model.
[0049] According to some embodiments of the present invention, the present invention provides a dual-light intelligent flight platform with reduced wind resistance, including a flight platform body 1 with a dual-light pod camera 2 at the bottom, a low-drag flight wing 3 arranged in a ring at intervals on the side of the flight platform body 1, and a wind pressure measuring component 4 disposed in the low-drag flight wing 3.
[0050] The low-drag flight wing 3 includes a lift rotor 31 and a low-drag extension arm 32. The wind pressure measurement component 4 is disposed inside the low-drag extension arm 32. One end of the low-drag extension arm 32 is connected to the lift rotor 31, and the other end of the low-drag extension arm 32 is rotatably connected to the flight platform body 1. The low-drag extension arm 32 has a hexagonal cross section and is provided with ventilation openings 322 spaced apart on the low-drag extension arm 32.
[0051] The low-drag flight wing 3, which is arranged in a ring on the flight platform body 1, is used to drive the flight platform to take off and land. The wind pressure measurement component 4 is used to detect the current wind speed and is connected to the control center inside the flight platform body 1. It is used to determine whether the low-drag extension arm 32 is rotating and the rotation angle. The elevator rotor 31 on the low-drag flight wing 3 and the internal structure of the flight platform can refer to the existing technology, which will not be elaborated here. The low-drag extension arm 32 is set with a hexagonal cross section, so that the surface in contact with the airflow changes from a conventional arc surface to a slope surface, which breaks the airflow and guides the direction of the airflow, thereby reducing wind resistance and increasing flight speed. The low-drag extension arm 32 is also provided with a vent 322, which reduces the overall weight and facilitates the passage of airflow, thereby increasing flight speed.
[0052] Reference Figure 3 , Figure 3 This is a cross-sectional schematic diagram of the connection structure between the low-drag extension arm and the interface in some embodiments of this utility model.
[0053] According to some embodiments of this utility model, optionally, the flight platform body 1 has an interface 11 extending outward from its side. A rotating motor 12 is installed within the interface 11, and the rotating shaft of the rotating motor 12 has a threaded end that extends outward. The interface 11 protects the rotating shaft. The rotating motor 12 and rotating shaft within the interface 11 drive the low-drag extension arm 32 connected to it to rotate, so that different faces of the hexagon face forward, corresponding to different wind resistance conditions, thus adjusting the flight speed. When the two angled faces of the hexagonal low-drag extension arm 32 face forward, it helps to break through the airflow, resulting in the highest flight speed. However, correspondingly, the flight stability decreases, making it unsuitable for complex airflow environments. When encountering complex airflow environments such as strong winds or unstable airflow, rotating the low-drag extension arm 32 to face forward increases wind resistance and improves flight stability.
[0054] The low-drag extension arm 32 is hollow inside. One end of the low-drag extension arm 32, which connects to the flight platform body 1, is provided with a threaded interface 321. The end of the rotating shaft is screwed into this threaded interface 321. The hollow design of the low-drag extension arm 32 reduces the overall weight while providing space for the wind pressure measurement component 4. The threaded interface 321 is used to connect to the rotating shaft, allowing for quick disassembly and installation of the low-drag extension arm 32 connected via the threaded interface 321.
[0055] Both the interface 11 and the threaded interface 321 are provided with wiring slots 5, and the two wiring slots 5 are positioned opposite each other. The wiring slots 5 are reserved for the connection line between the wind pressure measurement component 4 and the control center. The slots are opened along the curvature of the interface 11 and the threaded interface 321, so as not to affect their connection.
[0056] Reference Figure 4 , Figure 4 This is a cross-sectional schematic diagram of the wind pressure measurement component and the low wind resistance extension arm in some embodiments of this utility model.
[0057] According to some embodiments of this utility model, optionally, the four inclined surfaces of the low-drag extendable arm 32 are provided with ventilation openings 322 at intervals, and every four ventilation openings 322 form a group and are distributed in a ring on the low-drag extendable arm 32. The inner cavity of the low-drag extendable arm 32 communicates with the outside through the ventilation openings 322. The correspondingly ring-shaped distribution of ventilation openings 322 facilitates airflow and, in conjunction with the inclined surfaces of the low-drag extendable arm 32, increases the flight speed. Correspondingly, the internally installed wind pressure measuring component 4 can detect the wind resistance currently experienced by the extendable arm through the ventilation openings 322. Preferably, the wind pressure measuring component 4 is disposed on the group of ventilation openings 322 in the middle section of the low-drag extendable arm 32.
[0058] The wind pressure measurement assembly 4 includes a central shaft 41 and four wind pressure sensors 42 arranged in a ring on the central shaft 41. Each wind pressure sensor 42 has a detection end, which faces outward and corresponds to the ventilation opening 322 arranged in a ring on the low-drag extension arm 32. The central shaft 41 is used to fix the four wind pressure sensors 42, which correspond to the ventilation opening 322 to detect wind resistance. It should be understood that the specific fixing method of the wind pressure measurement assembly 4 in the low-drag extension arm 32 is not limited here. The wind pressure measurement assembly 4 can be fixed in the low-drag extension arm 32 by means of adhesive, magnetic attraction, or snap-fit, and the wind pressure sensors 42 can be connected to the ventilation opening 322. The fact that the specific fixing method is not described here does not mean that the wind pressure measurement assembly 4 is not fixed in the low-drag extension arm 32 or lacks necessary technical features.
[0059] Reference Figure 5 , Figure 5 This is a schematic diagram of the specific structure of the dual-light pod camera in some embodiments of this utility model.
[0060] Optionally, according to some embodiments of this utility model, the flight platform body 1 extends downward to provide a loading bracket 6. A protective storage shell 7 is provided on the loading bracket 6. A first rotating shaft 71 is rotatably connected to the protective storage shell 7 via bearings. A first helical gear 72 is provided on the outer side of the first rotating shaft 71, and a hinge block 73 is connected to the lower end of the first rotating shaft 71. The protective storage shell 7 is used to house the dual-light pod camera 2, the first rotating shaft 71 connected by bearings allows it to rotate, and the hinge block 73 is used to connect the dual-light pod camera 2.
[0061] The dual-light pod camera 2 is rotatably connected to the hinge block 73. A first drive motor 8 is provided on the protective storage shell 7. A drive helical gear is provided on the drive shaft of the first drive motor 8, and the drive helical gear meshes with the first helical gear 72. The first drive motor 8 is used to drive the helical gear to rotate, thereby driving the first helical gear 72 to rotate, so that the dual-light pod camera 2 rotates circumferentially. The specific structure of the flight platform body 1 can be referred to the background art document, and is only briefly described here.
[0062] This flight platform also includes a control center located within the flight platform body 1. A connecting cable is provided on the wind pressure measurement component 4, passing through the wiring slot 5 and connecting to the control center. The first drive motor 8 and the rotary motor 12 are electrically connected to the control center. The control center is used to control the flight of the flight platform, receiving and analyzing measurement data from the wind pressure measurement component 4 to control the rotation angle of the rotary motor 12, thereby achieving intelligent control of the low-drag extension arm 32 and modifying the flight speed. It should be understood that the specific coordination between wind pressure data and rotation angle can be obtained by those skilled in the art through calculation and multiple experiments. Accordingly, the intelligent control program involves software components, which are well known to those skilled in the art and will not be described in detail here.
[0063] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.
[0064] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.
[0065] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.
Claims
1. A dual-light intelligent flight platform for reducing wind resistance, characterized in that, include The flight platform itself is equipped with a dual-light pod camera at its bottom. Low-drag flight wings are arranged in a ring at intervals on the side of the flight platform body; The wind pressure measurement component is installed inside the low-drag flight wing; The low-drag flight wing includes a lift rotor and a low-drag extension arm. The wind pressure measurement component is located inside the low-drag extension arm. One end of the low-drag extension arm is connected to the lift rotor, and the other end of the low-drag extension arm is rotatably connected to the flight platform body. The low-drag extension arm has a hexagonal cross-section and is provided with ventilation openings spaced apart on the low-drag extension arm.
2. The dual-light intelligent flight platform for reducing wind resistance according to claim 1, characterized in that, The flight platform body has an interface extending outward from its side. A rotating motor is installed inside the interface, and the end of the rotating shaft of the rotating motor is threaded and extends outward.
3. The dual-light intelligent flight platform for reducing wind resistance according to claim 2, characterized in that, The low-drag extension arm is hollow inside, and a threaded interface is provided at one end of the low-drag extension arm that connects to the flight platform body. The end of the rotating shaft is screwed into the threaded interface.
4. The dual-light intelligent flight platform for reducing wind resistance according to claim 1, characterized in that, The low-drag extension arm has ventilation openings spaced apart on its four inclined surfaces. Every four ventilation openings form a group and are distributed in a ring on the low-drag extension arm. The inner cavity of the low-drag extension arm is connected to the outside through the ventilation openings.
5. The dual-light intelligent flight platform for reducing wind resistance according to claim 4, characterized in that, The wind pressure measurement assembly includes a central shaft and four wind pressure sensors arranged in a ring on the central shaft. Each wind pressure sensor has a detection end, which faces outward and corresponds to the ventilation openings arranged in a ring on the low-drag extension arm.
6. The dual-light intelligent flight platform for reducing wind resistance according to claim 3, characterized in that, Both the mating interface and the threaded interface are provided with wiring grooves, and the positions of the two wiring grooves are corresponding.
7. The dual-light intelligent flight platform for reducing wind resistance according to claim 6, characterized in that, The flight platform extends downward to form a loading bracket, which is equipped with a protective storage shell. A first rotating shaft is rotatably connected to the protective storage shell via a bearing. A first helical gear is provided on the outer side of the first rotating shaft, and a hinge block is connected to the lower end of the first rotating shaft.
8. The dual-light intelligent flight platform for reducing wind resistance according to claim 7, characterized in that, The dual-light pod camera is rotatably connected to the hinge block. A first drive motor is provided on the protective storage shell. A drive helical gear is provided on the drive shaft of the first drive motor, and the drive helical gear meshes with the first helical gear.
9. The dual-light intelligent flight platform for reducing wind resistance according to claim 8, characterized in that, It also includes a control center, which is located inside the flight platform. The wind pressure measurement component is equipped with a connecting wire that passes through the wiring slot and connects to the control center. The first drive motor and the rotating motor are electrically connected to the control center.
Citation Information
Patent Citations
Inspection drone with dual-light camera bracket structure
CN220948580U