A detection device for a new inorganic coating for wall surface antibacterial property

Abstract

The application discloses a kind of detection devices for new inorganic coating of wall antibacterial property, it is related to inorganic coating detection equipment technical field, support base is rotatably connected with rotating chassis on the support base, it is connected between the support base and rotating chassis by angle rotating mechanism, for adjusting the angle of coating sample board, detection execution mechanism is equipped on the rotating chassis, execution head is installed at the output end of the detection execution mechanism, locking mechanism is equipped on the lateral wall of the rotating chassis, for the fixation of coating sample board.The application can accurately adjust the installation inclination of coating sample board by the cooperation of support base and angle rotating mechanism, completely simulates the conventional vertical or slightly inclined service condition of building indoor wall, ensures that the stress state, contact mode of coating sample board during detection process is highly consistent with actual use scene, ensures the accuracy of detection result.

Description

Technical Field

[0001] This invention relates to the field of inorganic coating testing equipment, specifically to a testing device for novel inorganic coatings with antibacterial properties on walls. Background Technology

[0002] With the popularization of the concept of healthy living, new antibacterial inorganic wall coatings, with their advantages of being environmentally friendly, having long-lasting antibacterial properties, and being resistant to aging, are widely used in interior wall decoration of various buildings such as residences, hospitals, and schools. The long-term stability of their antibacterial and washability properties has become a core indicator for measuring product quality, directly affecting the safety of the living environment and the service life of the coating. Before mass production and market launch, wall coatings require testing using specialized testing equipment to assess their relevant properties to ensure product quality meets standards.

[0003] However, existing testing equipment for antibacterial inorganic wall coatings still suffers from numerous technical shortcomings in practical applications. It struggles to meet the precise testing requirements of new inorganic coatings and is disconnected from actual wall service conditions, resulting in unreliable test data and an inability to comprehensively and accurately evaluate the long-term performance of the coatings. Furthermore, the fixed installation angle of existing coating samples fails to simulate real wall conditions. The fixed horizontal platform of existing testing equipment leads to significant differences in the stress state and contact method of the coating samples compared to actual wall service conditions, resulting in test results that deviate significantly from actual usage effects and fail to reflect the coating's performance under real-world conditions.

[0004] Therefore, in order to address the shortcomings of the existing technology, a new detection device for antibacterial inorganic coatings on walls was proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for novel inorganic antibacterial coatings for walls, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing device for novel antibacterial inorganic coatings for walls, comprising: a support base, a rotating base rotatably connected to the support base, and the support base and the rotating base being connected by an angle rotation mechanism for adjusting the angle of the coating sample; The rotating base is equipped with a detection and execution mechanism, and an execution head is installed at the output end of the detection and execution mechanism; The rotating base is equipped with a locking mechanism on its side wall for fixing the paint sample.

[0007] Furthermore, the angle rotation mechanism includes a mounting side plate, on which a rotary motor is mounted. The mounting side plate is fixedly connected to a rotating base, and the rotating base is connected to the support base via a connecting shaft. The rotary motor drives the rotation of the connecting shaft through a bevel gear transmission assembly.

[0008] Furthermore, the bevel gear transmission assembly includes a first bevel gear and a second bevel gear. The first bevel gear is disposed on the connecting shaft, and the second bevel gear is disposed on the drive end of the rotary motor, and the first bevel gear meshes with the second bevel gear.

[0009] Furthermore, the detection actuator is connected to the rotating base frame via a fixed connecting frame and a movable connecting frame. A movable limiting frame is provided on the side wall of the rotating base frame, and the movable connecting frame is slidably connected to the movable limiting frame. The movable limiting frame is used to limit the movement direction and range of the movable connecting frame, thereby enhancing the stability of the movable connecting frame.

[0010] Furthermore, the detection actuator includes a reciprocating motion component and a pressure application component. The reciprocating motion component includes a base, on which a push cylinder and a slide are provided. The push cylinder is used to drive the slide, and the slide is slidably connected to the base and fixedly connected to the movable connecting frame. A mounting platform is provided on the slide via a synchronous belt drive component, and the pressure application component is mounted on the mounting platform. The synchronous belt drive component drives the mounting platform to move.

[0011] Furthermore, a first slide rail is fixedly connected to the base, a first slide block is fixedly connected to the slide rail, and the first slide block is slidably connected to the first slide rail. The pushing end of the pushing cylinder is fixedly connected to the slide rail.

[0012] Furthermore, the synchronous belt drive assembly includes a drive motor, which is fixedly connected to a slide table. Two synchronous pulleys are symmetrically arranged on the slide table, and a synchronous belt is fitted on both synchronous pulleys. The shaft of one of the synchronous pulleys is connected to the output shaft of the drive motor. A drive seat is fixedly connected to the mounting platform, and the drive seat is mounted on the synchronous belt.

[0013] Furthermore, the rotating base has multiple rotating shafts on its side wall via supports, and two adjacent rotating shafts are connected by universal joints. Each rotating shaft is equipped with a locking frame, which includes an extension frame and is mounted on the rotating shaft. The end of the extension frame away from the rotating shaft is provided with an edge frame, which abuts against the upper edge of the paint sample.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the cooperation of a support base and an angle rotation mechanism, can precisely adjust the installation tilt angle of the paint sample, completely simulating the normal vertical or slightly tilted service conditions of the interior wall of a building, ensuring that the stress state and contact method of the paint sample during the testing process are highly consistent with the actual use scenario, and ensuring the accuracy of the test results.

[0015] 2. The angle rotation mechanism in this invention adopts a bevel gear transmission assembly, which has the advantages of large transmission torque, precise transmission ratio and strong self-locking. It can realize the automatic and precise adjustment of the angle of the rotating base and the paint sample. After the adjustment is completed, it is stably locked without angle deviation.

[0016] 3. This invention provides precise guidance and limitation for the detection actuator through the sliding cooperation of the movable limiting frame and the movable connecting frame, strictly limiting the movement direction and range of the actuator, effectively avoiding problems such as lateral deviation and force vibration during reciprocating wiping, ensuring that the force of the actuator head on the paint sample is uniform, and avoiding local excessive wear or insufficient contact.

[0017] 4. The execution head of this invention adopts a quick-disassembly structure, which can be flexibly replaced with a flexible brush, sponge, high-pressure spray nozzle, and ultraviolet irradiation head to achieve mechanical scrubbing resistance, soft scrubbing, water or detergent rinsing aging, ultraviolet light aging and other tests, accurately simulating the synergistic effect of various working conditions in the actual use of the wall.

[0018] 5. The locking mechanism of this invention employs a design where multiple rotating shafts are linked through universal joints, driving multiple sets of locking frames to open and close synchronously. The edge frame presses against the edge of the sample to achieve a firm fixation, eliminating the need to adjust each locking component individually, making assembly and disassembly convenient and efficient. Simultaneously, the locking is firm and reliable, effectively preventing the sample from loosening or shifting during repeated wiping and spraying, further ensuring the accuracy of test data and improving the equipment's versatility and batch testing capabilities. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a testing device for a novel inorganic antibacterial coating for walls; Figure 2 This is a schematic diagram of the detection actuator in a detection device for a novel inorganic antibacterial coating for walls; Figure 3 This is a visual representation of the detection actuator in a testing device for a novel inorganic antibacterial coating for walls, taken from another angle. Figure 4 This is an enlarged view of the rotating base portion of a testing device for a novel inorganic antibacterial coating for walls; Figure 5 This is an enlarged view of the second bevel gear section in a testing device for a novel inorganic antibacterial coating for walls; Figure 6 This is an enlarged view of the first bevel gear section in a testing device for a novel inorganic antibacterial coating for walls; Figure 7 This is an enlarged view of the movable limiting frame in a testing device for a novel inorganic antibacterial coating for walls; Figure 8 This is an enlarged view of the locking frame structure in a testing device for a novel inorganic antibacterial coating for walls.

[0020] In the diagram: 1. Support base; 2. Rotating base frame; 3. Actuator head; 4. Mounting side plate; 5. Rotary motor; 6. First bevel gear; 7. Second bevel gear; 8. Fixed connecting frame; 9. Moving connecting frame; 10. Moving limit frame; 11. Base; 12. Push cylinder; 13. Slide table; 14. Mounting platform; 15. First slide rail; 16. Second slide rail; 17. Drive motor; 18. Synchronous pulley; 19. Synchronous belt; 20. Drive seat; 21. Rotating shaft; 22. Universal joint; 23. Locking frame; 2301. Extension frame; 2302. Edge frame. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0022] like Figures 1 to 8As shown, a testing device for novel antibacterial inorganic coatings for walls includes: a support base 1, which is fixedly connected inside the testing cabinet. During installation, the rotating base 2 and the mounting surface of the coating sample are kept relatively vertical to the ground (between 80° and 100°). This angle range accurately simulates the conventional installation tilt angle of interior building walls, avoiding the problem of excessive deviation between traditional horizontal placement testing and actual service conditions. The rotating base 2 is rotatably connected to the support base 1. The support base 1 and the rotating base 2 are connected by an angle rotation mechanism to adjust the installation tilt angle of the coating sample, adapting to different building wall conditions. The angle rotation mechanism includes... The system includes a mounting side plate 4, on which a rotary motor 5 is mounted. The mounting side plate 4 is fixedly connected to the rotating base 2. The rotating base 2 and the support base 1 are connected by a connecting shaft. The rotary motor 5 drives the rotation of the connecting shaft through a bevel gear transmission assembly. The bevel gear transmission assembly includes a first bevel gear 6 and a second bevel gear 7. The first bevel gear 6 is located on the connecting shaft, and the second bevel gear 7 is located on the drive end of the rotary motor 5. The first bevel gear 6 and the second bevel gear 7 mesh. The bevel gear transmission has the characteristics of large transmission torque, precise transmission ratio, and strong self-locking. It can achieve precise adjustment of the angle of the rotating base 2, and after adjustment, it can be stably locked without angular deviation.

[0023] The rotary motor 5 serves as the power source for angle adjustment. It transmits power to the connecting shaft via a bevel gear transmission assembly, thereby driving the rotating base 2 to rotate around the connecting shaft and achieve angle adjustment. The bevel gear transmission assembly consists of a first bevel gear 6 and a second bevel gear 7 that mesh with each other. The first bevel gear 6 is fixedly mounted on the connecting shaft connecting the support base 1 and the rotating base 2, while the second bevel gear 7 is fixedly installed on the drive end of the rotary motor 5. The meshing accuracy of the two gears is rigorously calibrated to ensure efficient and accurate power transmission. After angle adjustment is completed, the rotary motor 5 must be de-energized, and the angle is locked using the self-locking property of the bevel gears. Then, the process can proceed to the paint sample fixing stage.

[0024] The rotating base 2 is equipped with a detection execution mechanism. The detection execution mechanism is connected to the rotating base 2 through a fixed connecting frame 8 and a movable connecting frame 9. The fixed connecting frame 8 is made of high-strength steel and is fixed by welding and bolts. One end is tightly fitted and fixed to the side wall of the rotating base 2, and the other end is rigidly connected to the base 11 of the detection execution mechanism. It mainly bears the overall weight of the detection execution mechanism and plays a core role in load bearing and positioning, ensuring that the detection execution mechanism will not shift as a whole during movement. The movable connecting frame 9, as an auxiliary connecting component, effectively shares the force of the fixed connecting frame 8 and provides flexible support for the reciprocating movement of the detection execution mechanism. It ensures that the detection execution mechanism can synchronously adapt to the angle adjustment of the rotating base 2 and always maintain a precise correspondence with the surface of the paint sample, avoiding loosening of the connection parts or displacement of the detection position due to angle adjustment.

[0025] A movable limiting frame 10 is provided on the side wall of the rotating base frame 2, and the movable connecting frame 9 is slidably connected to the movable limiting frame 10. Specifically, the movable limiting frame 10 has a limiting through hole that precisely matches the outer dimensions of the movable connecting frame 9. The inner wall of the limiting through hole is precision ground and polished to reduce surface roughness, which can effectively reduce the frictional resistance when the movable connecting frame 9 slides, reduce component wear, and avoid phenomena such as sliding jamming and sticking, thus ensuring smooth movement. One end of the movable connecting frame 9 is fixedly connected to the slide table 13, and the other end is inserted into the limiting through hole of the movable limiting frame 10. It can slide smoothly along the extension direction of the through hole. The limiting through hole restricts the movement direction and range of the movable connecting frame 9, effectively reducing problems such as lateral deviation and force vibration of the detection actuator during reciprocating motion. This avoids insufficient contact and uneven force between the actuator 3 and the paint sample due to deviation, which would affect the accuracy of the detection data. It also prevents uneven washing and spraying actions caused by vibration, which would not be able to truly simulate the actual working conditions. This greatly enhances the operational stability of the entire detection device. The detection actuator includes a reciprocating motion component and a pressure application component. The reciprocating motion component includes a base 11, on which a push cylinder 12 and a slide 13 are provided. The push cylinder 12 is used to drive the slide 13, and the slide 13 is slidably connected to the base 11. A first slide rail 15 is fixedly connected to the base 11, and a first slide block is fixedly connected to the slide 13, and the first slide block is slidably connected to the first slide rail 15. The push end of the push cylinder 12 is fixedly connected to the slide 13, and the slide 13 is fixedly connected to the movable connecting frame 9. A mounting platform 14 is provided on the slide table 13 via a synchronous belt drive assembly, and a pressure application actuator is mounted on the mounting platform 14. A second slide rail 16 is provided on the slide table 13, and the mounting platform 14 is slidably connected to the second slide rail 16. The synchronous belt drive assembly drives the mounting platform 14 to move. The synchronous belt drive assembly includes a drive motor 17, which is fixedly connected to the slide table 13. Two synchronous pulleys 18 are symmetrically arranged on the slide table 13, and a synchronous belt 19 is fitted onto both pulleys 18. The surface of the synchronous belt 19 is treated with anti-slip material to effectively prevent slippage during transmission, ensuring the stability and accuracy of power transmission. Simultaneously, the synchronous belt 19 has a certain degree of elasticity, which can buffer the impact force generated during transmission and reduce the impact of vibration on detection accuracy. The shaft of one of the synchronous pulleys 18 is connected to the output shaft of the drive motor 17. A drive seat 20 is fixedly connected to the mounting platform 14 and is mounted on the synchronous belt 19. An actuator head 3 is installed at the output end of the detection actuator. The pressure application actuator includes a vertical lifting drive component and a pressure sensor. The actuator head 3 is flexible. The brush can also be replaced with a sponge, a high-pressure spray nozzle, or an ultraviolet irradiation head. Operators can adjust the speed and direction of the drive motor 17 via the control terminal to precisely control the movement distance and speed of the mounting platform 14, ensuring that the actuator 3 accurately aligns with the detection area of ​​the paint sample, avoiding blind spots or contact deviations, and ensuring the comprehensiveness and uniformity of the detection action. This is especially suitable for scenarios where the paint sample surface has minor unevenness or requires zoned detection. The vertical lifting drive uses a miniature electric push rod, featuring high lifting accuracy, controllable thrust, and stable operation. Its output end is fixedly connected to the actuator 3, enabling it to drive the actuator 3 to achieve vertical lifting and adjusting the contact pressure between the actuator 3 and the paint sample. For new inorganic paint samples of different thicknesses and hardness, the pressure can be precisely adjusted to avoid surface damage and coating peeling due to excessive pressure, which would affect the detection results. It also prevents insufficient pressure from causing inadequate contact between the actuator 3 and the paint sample, failing to simulate the friction and spraying force during actual use, ensuring that the detection conditions are consistent with actual conditions.

[0026] The rotating base 2 has a locking mechanism on its side wall for fixing the paint sample. The rotating base 2 has multiple rotating shafts 21 on its side wall via supports, and two adjacent rotating shafts 21 are connected by a universal joint 22. Each rotating shaft 21 is provided with a locking frame 23, which includes an extension frame 2301. The extension frame 2301 is set on the rotating shaft 21, and the end of the extension frame 2301 away from the rotating shaft 21 is provided with an edge frame 2302. The edge frame 2302 abuts against the upper edge of the paint sample. It is worth noting that in actual use, a knob or micro motor is installed on the end or outer side wall of one of the rotating shafts 21 to drive the connected rotating shaft 21 to rotate, thereby driving the other rotating shafts 21 to rotate as well.

[0027] This device, through the coordinated operation of its various mechanisms, simulates the actual service conditions of paint samples on building interior walls, enabling precise and stable execution of tests related to the antibacterial properties of the paint. This ensures that the test results are consistent with the actual usage effects. The specific working principle is as follows: The support base 1 is fixedly installed inside the testing cabinet. During installation, it is strictly ensured that the rotating base 2 and the mounting surface of the paint sample are in a relatively vertical state of 80°-100° with the ground. This angle range accurately matches the conventional installation tilt angle of the building's interior wall, fundamentally solving the problem of excessive deviation between traditional horizontal placement testing and actual service conditions, laying the foundation for testing accuracy. Subsequently, the paint sample is fixed by a locking mechanism. Rotating one of the rotating shafts 21 (which can be driven by an end knob or a micro motor) and using the linkage of the universal joint 22, all rotating shafts 21 are driven to rotate synchronously, thereby causing the locking brackets 23 on each rotating shaft 21 to flip, so that the edge bracket 2302 is tightly abutted against the upper edge of the paint sample, achieving a firm fixation of the paint sample and preventing the sample from shifting during the testing process and affecting the testing accuracy.

[0028] The support base 1 and the rotating frame 2 are connected by an angle rotation mechanism, which allows for flexible adjustment of the installation tilt angle of the paint sample according to the actual working conditions of different building walls. During angle adjustment, the rotary motor 5, which mounts the side plate 4 on the rotating frame 2, is activated. The drive end of the rotary motor 5 drives the second bevel gear 7 to rotate. Since the second bevel gear 7 meshes with the first bevel gear 6 located on the connecting shaft between the support base 1 and the rotating frame 2, the power of the rotary motor 5 is transmitted to the connecting shaft using the characteristics of high torque, precise transmission ratio, and strong self-locking of the bevel gear transmission. This drives the rotating frame 2 to rotate around the connecting shaft until the preset tilt angle is reached. After adjustment, the self-locking performance of the bevel gear transmission ensures stable locking of the rotating frame 2, guaranteeing no angular deviation during testing and ensuring the stability of the testing conditions.

[0029] The detection actuator is connected to the rotating base frame 2 via a fixed connecting frame 8 and a movable connecting frame 9. The movable connecting frame 9 is slidably connected within the movable limiting frame 10 on the side wall of the rotating base frame 2. The movable limiting frame 10 restricts the movement direction and range of the movable connecting frame 9 through the limiting through hole, effectively preventing lateral deviation and force vibration during the reciprocating motion of the detection actuator, enhancing the overall operational stability, and ensuring the uniformity of washing, spraying, and other actions.

[0030] The reciprocating motion and precise pressure application of the detection actuator are achieved through the coordinated action of multiple components: In the reciprocating motion component, after the push cylinder 12 on the base 11 is activated, it drives the slide 13, which is fixedly connected to it, to slide along the first slide rail 15 on the base 11. The slide 13 drives the entire pressure application actuator and the actuator head 3 to reciprocate, simulating the reciprocating friction and spraying effects on the actual wall surface. At the same time, the drive motor 17 on the slide 13 is activated, driving one of the synchronous pulleys 18 to rotate. Through the transmission action of the synchronous belt 19, it drives the other synchronous pulley 18 to rotate synchronously. The drive seat 20 connected to the synchronous belt 19 then drives the mounting platform 14 to move along the second slide rail 16, further fine-tuning the position of the actuator head 3 to ensure that the actuator head 3 makes precise contact with the surface of the paint sample. The vertical lifting drive in the pressure application assembly adjusts the pressure between the actuator head 3 and the paint sample. A pressure sensor monitors the pressure value in real time to ensure stable pressure during testing. The actuator head 3 can be flexibly replaced with a flexible brush, sponge, high-pressure spray nozzle, or UV irradiation head to perform different testing actions on the paint sample, such as washing, wiping, spraying, and UV aging, meeting diverse antibacterial testing needs. Throughout the testing process, all mechanisms work together seamlessly, with precise angle adjustment, secure sample fixation, and stable and uniform testing actions. By simulating the service conditions of the paint on actual building walls, the test data accurately reflects the antibacterial performance of the new inorganic paint, providing a reliable basis for paint quality evaluation.

[0031] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A testing device for novel inorganic antibacterial coatings for walls, comprising: The support base (1) is characterized in that a rotating base frame (2) is rotatably connected to the support base (1), and the support base (1) and the rotating base frame (2) are connected by an angle rotation mechanism for adjusting the angle of the paint sample; The rotating base (2) is equipped with a detection execution mechanism, and the output end of the detection execution mechanism is equipped with an execution head (3). The rotating base (2) is provided with a locking mechanism on its side wall for fixing the paint sample.

2. The detection device for novel inorganic antibacterial coatings for walls according to claim 1, characterized in that, The angle rotation mechanism includes a mounting side plate (4), on which a rotary motor (5) is mounted. The mounting side plate (4) is fixedly connected to the rotating base (2). The rotating base (2) is connected to the support base (1) via a connecting shaft. The rotary motor (5) drives the rotation of the connecting shaft through a bevel gear transmission assembly.

3. The detection device for novel inorganic antibacterial coatings for walls according to claim 2, characterized in that, The bevel gear transmission assembly includes a first bevel gear (6) and a second bevel gear (7). The first bevel gear (6) is mounted on a connecting shaft, and the second bevel gear (7) is mounted on the drive end of a rotary motor (5). The first bevel gear (6) meshes with the second bevel gear (7).

4. The detection device for novel inorganic antibacterial coatings for walls according to claim 1, characterized in that, The detection actuator is connected to the rotating base frame (2) through a fixed connecting frame (8) and a movable connecting frame (9). A movable limiting frame (10) is provided on the side wall of the rotating base frame (2), and the movable connecting frame (9) is slidably connected to the movable limiting frame (10). The movable limiting frame (10) is used to limit the movement direction and movement range of the movable connecting frame (9) and enhance the stability of the movable connecting frame (9).

5. The detection device for novel inorganic antibacterial coatings for walls according to claim 4, characterized in that, The detection actuator includes a reciprocating motion component and a pressure application component. The reciprocating motion component includes a base (11), on which a push cylinder (12) and a slide (13) are provided. The push cylinder (12) is used to drive the slide (13), and the slide (13) is slidably connected to the base (11) and fixedly connected to the movable connecting frame (9). The slide (13) is provided with a mounting platform (14) via a synchronous belt drive component, and the pressure application component is mounted on the mounting platform (14). The slide (13) is provided with a second slide rail (16), and the mounting platform (14) is slidably connected to the second slide rail (16). The synchronous belt drive component drives the mounting platform (14) to move.

6. The detection device for novel inorganic antibacterial coatings for walls according to claim 5, characterized in that, A first slide rail (15) is fixedly connected to the base (11), a first slide block is fixedly connected to the slide table (13), and the first slide block is slidably connected to the first slide rail (15). The pushing end of the pushing cylinder (12) is fixedly connected to the slide table (13).

7. The detection device for novel inorganic antibacterial coatings for walls according to claim 5, characterized in that, The synchronous belt drive assembly includes a drive motor (17), which is fixedly connected to a slide (13). Two synchronous pulleys (18) are symmetrically arranged on the slide (13), and a synchronous belt (19) is fitted on both synchronous pulleys (18). The shaft of one of the synchronous pulleys (18) is connected to the output shaft of the drive motor (17). A drive seat (20) is fixedly connected to the mounting platform (14), and the drive seat (20) is set on the synchronous belt (19).

8. The detection device for novel inorganic antibacterial coatings for walls according to claim 1, characterized in that, The rotating base (2) has multiple rotating shafts (21) on its side wall via supports, and two adjacent rotating shafts (21) are connected by a universal joint (22). Each rotating shaft (21) is provided with a locking frame (23). The locking frame (23) includes an extension frame (2301), and the extension frame (2301) is set on the rotating shaft (21). The end of the extension frame (2301) away from the rotating shaft (21) is provided with an edge frame (2302), and the edge frame (2302) abuts against the upper edge of the paint sample.

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