Dental lightness training colorimetric card

Abstract

The present invention discloses a dental lightness training colorimetric card, and relates to the field of medical assistance, the dental lightness training colorimetric card comprises a shell, two box bodies with bottom openings and a movement mechanism, five background plates with different colors and five different color blocks are arranged in the shell, and five rotating color cards are arranged in the two box bodies through shaft rods, movement mechanisms are arranged in the shell and the two box bodies, the movement mechanisms are used for controlling the color blocks and the color cards to move so as to carry out brightness comparison training, the five background plates are embedded in the inner bottom wall of the opening part of the shell, and the five color blocks are stacked at the corner position of one end of the inner space of the shell. Each color card is composed of five color sheet plates and a top sheet plate, the five color cards in one box body are the same in lightness and different in hue and saturation, and the five color cards in the other box body are different in lightness, hue and saturation. And the brightness identification level of a user in a complex color environment is improved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of medical assistance, and in particular to a dental brightness training color chart. Background Art

[0002] The three attributes of color include lightness, saturation, and hue. Lightness contrast plays a dominant role in color composition, and the hierarchy and spatial relationships of colors are primarily expressed through lightness contrast. If there is only hue contrast, or only saturation contrast without lightness contrast, the outline of the pattern will be difficult to discern. In aesthetic dental restorations, due to the large lightness span of natural tooth color space, accurate reproduction of the lightness of the restoration is crucial. Some scholars believe that lightness value is the primary factor in controlling tooth color, followed by saturation value, and hue value has the least impact on tooth color reproduction. When the hue is uniform, it is relatively easy to judge lightness differences; however, when there are multiple hues, judging lightness can sometimes be very difficult due to the interference of hue.

[0003] Dental colorimetry methods include visual colorimetry, instrumental colorimetry, and digital photo colorimetry. Visual colorimetry is the most commonly used, but it is subject to significant subjectivity and errors. The VITA 3D Master 26-color palette is a commonly used tool for visual colorimetry. It categorizes lightness into five levels, saturation into five levels, and hue into three levels. Correct lightness matching is a crucial first step in colorimetry. However, dentists often encounter interference when determining lightness due to differences in saturation and hue, making it crucial to train their ability to discern lightness.

[0004] The colorimetric training system developed by Professor Jakstat of Germany includes a colorimetric training box, colorimetric training simulation software, and a colorimetric detection box. This system improves the scientific nature of colorimetric training, but the training color chips in the system only contain those from the VITA 3D-MASTER colorimetric guide. Furthermore, the high cost of foreign-designed colorimetric training systems has limited their widespread adoption. Furthermore, the system consists of multiple components, including light sources and colorimetric guides, which increases the complexity of operation and maintenance. Currently, there is a lack of effective tools specifically for dental professionals to train color and brightness perception and judgment. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a dental lightness training color chart to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A dental lightness training color chart comprises a shell, two boxes with bottom openings, and a motion mechanism. The shell is provided with five background plates of different colors and five color blocks of different colors. Five rotatable color cards are provided in each of the two boxes via a shaft. The shell and the two boxes are provided with a motion mechanism, the motion mechanism being used to control the movement of the color blocks and color cards to facilitate lightness contrast training. The top of the shell is provided with an opening. The five background plates are embedded in the inner bottom wall of the shell at the opening. The five color blocks are stacked and arranged at a corner at one end of the interior space of the shell. Each color card is composed of five color plate plates and a top plate, and the top plate is rotatably sleeved on the shaft. The five color cards in one box have the same brightness but different hues and saturations, and the five color cards in another box have different brightness, hues and saturations; The motion mechanism consists of a moving component and a pushing component. The moving component is arranged in the shell to move five stacked color blocks separately, and the pushing component is arranged in the box to push the color cards one by one.

[0007] Specifically, the moving assembly includes five screw rods and five slide rails. The inner wall of the shell is evenly provided with five strip grooves. The five screw rods are rotatably installed in the five strip grooves respectively. The five slide rails are fixed to the other inner wall of the shell by screws respectively. The five screw rods are each provided with a moving block. The five slide rails are each provided with a slider. The two side walls of the five color blocks are respectively connected to the moving block and the slider by connecting rods.

[0008] Specifically, the technical solution of this invention is that one end of the five screw rods is fixedly connected to a rotating shaft, and the five rotating shafts extend through the wall of the shell to the outside. The outer walls of the five rotating shafts away from the screw rods are provided with rubber sleeves, and the inner wall of each rubber sleeve is bonded to the outer wall of the rotating shaft, and the outer wall of each rubber sleeve is provided with anti-slip grooves.

[0009] Specifically, the two boxes are fixed on the lower surface of the shell, and the two boxes are arranged in parallel and staggered. Label stickers are adhered to the opening on the upper surface of the shell and the outer walls of the opposite long sides of the two boxes.

[0010] Specifically, the inner top walls of the two boxes are fixed with a first magnet, and the side wall of a color plate away from the top plate of each color card close to the inner top wall of the box is embedded with a first iron sheet, and the first magnet is magnetically attracted to the first iron sheet; A second magnet is fixed to the inner wall of the two boxes on the side close to each other, and a second iron sheet is embedded in the side wall of each top plate away from the top wall inside the box, and the second magnet is magnetically attracted to the second iron sheet.

[0011] Specifically, the pushing assembly includes five L-shaped push rods, the long end top walls of the five L-shaped push rods are in contact with the inner top wall of the box, the long end bottom walls of the five L-shaped push rods are in contact with the side walls of the color plate, and the short end outer wall bottoms of the five L-shaped push rods are fixedly connected with limiting blocks, and each of the opposite outer walls of the box is evenly provided with five movable grooves, and a vertical guide rod is installed in each of the movable grooves, and each of the limiting blocks is passed through the guide rod.

[0012] Specifically, the outer walls of both sides of each limiting block are in contact with the groove wall of the movable groove and are slidably connected, and one end of each limiting block away from the L-shaped push rod passes through the movable groove and is fixed with a push block.

[0013] Specifically, the bottom of the short end of each L-shaped push rod is bonded with a support spring, the bottom end of each support spring is bonded with a fixing plate, and the outer wall of the fixing plate is fixedly connected to the inner wall of the box.

[0014] Specifically, the outer wall of the long side of the shell and the outer wall of one side of each top plate are bonded with color-coded stickers.

[0015] Specifically, the top of the shell is located at the opening and is rotatably mounted with a transparent top plate.

[0016] In summary, the present invention has the following major beneficial effects: through the designed color blocks, color card arrangement, and color matching, the lightness recognition ability under hue and saturation differences is trained, and the user's lightness recognition level in complex color environments is improved. This helps to more accurately perform tooth color comparison in actual clinical operations, especially when there are subtle differences in tooth color. It enables users to accurately identify the lightness of teeth under different background conditions, reduces the interference of background factors on the color comparison results, and thus improves the accuracy and reliability of color comparison; Compared with expensive colorimetric training systems, this colorimetric card device is low-cost, has a relatively simple manufacturing process, is easy to promote and popularize, and is suitable for all levels of dental medical institutions and dental medical schools, effectively reducing the cost of tooth colorimetric training and clinical operations; This colorimetric card device can be used as a teaching tool in dental schools to help students learn and master tooth color identification techniques and improve their lightness recognition ability. Through systematic training, students can more accurately identify subtle differences in tooth color, laying a solid foundation for future clinical work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall isometric structure of the present invention; Figure 2 This is a schematic diagram of the overall oblique axonometric structure of the present invention; Figure 3 It is a schematic diagram of the isometric structure of a housing and a box section of the present invention; Figure 4 For the present invention Figure 3 Oblique axonometric structural diagram; Figure 5 This is a schematic diagram of the oblique axonometric structure of the mobile assembly of the present invention; Figure 6 This is a schematic diagram of the oblique axonometric structure of the push assembly of the present invention; Figure 7 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 8 For the present invention Figure 4 Enlarged view of point B in the middle.

[0018] Description of the drawings: 1. Shell; 101. Strip groove; 102. Transparent top plate; 103. Background plate; 104. Color block; 2. Box; 201. Color card; 2011. Color plate; 2012. Top plate; 2013. First iron plate; 2014. Second iron plate; 202. Shaft; 203. Moving slot; 204. First magnet; 205. Second magnet; 3. Motion mechanism; 4. Moving assembly; 401. Screw; 402. Slide rail; 403. Slider; 404. Rotating shaft; 4041. Rubber sleeve; 405. Connecting rod; 406. Moving block; 5. Pushing assembly; 501. L-shaped push rod; 502. Support spring; 503. Fixed plate; 504. Limiting block; 505. Guide rod; 506. Pushing block; 6. Marking sticker; 7. Color label sticker. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0020] The following describes an embodiment of the present invention based on its overall structure.

[0021] It should be noted that all structural materials are made of degradable plastic to reduce the impact on the environment without affecting the performance and service life. The connecting rod 405 is set to be transparent to reduce visual interference.

[0022] In this embodiment, please refer to Figures 1-4As shown, a dental lightness training color chart includes a shell 1, two boxes 2 with bottom openings, and a motion mechanism 3. The shell 1 is provided with five background plates 103 of different colors and five different color blocks 104. The two boxes 2 are each provided with five rotating color charts 201 via a shaft 202. The ends of the shaft 202 are fixedly connected to the inner wall of the box 2. The five color charts 201 in one box 2 have the same lightness and slightly different hue and saturation. The five color charts 201 in the other box 2 have slightly different lightness and slightly different hue and saturation. Differently, the housing 1 and the two boxes 2 are each provided with a motion mechanism 3, which is used to control the movement of the color blocks 104 and the color cards 201 to facilitate brightness contrast training. The top of the housing 1 is provided with an opening, and the five background plates 103 are embedded in the inner bottom wall at the opening of the housing 1. The five color blocks 104 are stacked and arranged at a corner at one end of the internal space of the housing 1. Each color card 201 is composed of five color plate plates 2011 and a top plate 2012, and the top plate 2012 is rotatably sleeved on the shaft 202. The two boxes 2 are fixed to the lower surface of the shell 1, and the two boxes 2 are arranged in parallel and staggered. The upper surface of the shell 1 is located at the opening and the outer walls of the opposite long sides of the two boxes 2. There are labeling stickers 6. The three labeling stickers 6 are used to indicate three groups respectively. The first group is the boxes 2 with the same color card 201 brightness and slight differences in hue and saturation. The second group is another box 2 with slight differences in brightness and different hue and saturation in the color card 201. The third group is the background board 103 and the color block 104 in the shell 1. The outer wall of the long side of the shell 1 and the outer wall of one side of each top plate 2012 are adhered with color label stickers 7. The color label stickers 7 are used to mark the brightness (L), hue (a) and saturation (b) values ​​corresponding to each color block 104 and the color plate 2011, so as to facilitate users to record and identify; The L*a*b* values ​​of the first set of five color cards 201 are as follows:

[0023] The L*a*b* values ​​of the second set of five color cards 201 are as follows:

[0024] The L*a*b* values ​​of the third set of five background plates 103 and five color blocks 104 are as follows:

[0025] The motion mechanism 3 is composed of a moving component 4 and a pushing component 5. The moving component 4 is arranged in the housing 1 for moving the five stacked color blocks 104 respectively, and the pushing component 5 is arranged in the box 2 for pushing the color cards 201 one by one.

[0026] When conducting colorimetric training, you should be under natural light or standard light sources. Natural light can provide uniform and realistic lighting conditions, while standard light sources can simulate specific dental treatment environments, making the colorimetric results more valuable for reference. At the same time, ensure that the device is placed flat on a stable surface, or when held in hand, keep an appropriate distance from the eyes, generally 20-30 cm, to meet the normal observation distance of the human eye for color. Group training: During the first training session, the user pushes the five color cards 201 in sequence along the shaft 202 by pushing the assembly 5, rotating them from horizontal to vertical, and then removing them from the box 2. The user needs to carefully observe each color chip plate 2011 in each color card 201 to see if they have the same brightness. However, due to subtle changes in hue and saturation, the colors of the color chip plates 2011 will still present different visual effects overall. Repeated comparison and identification will improve the user's ability to grasp color details, which will help to more accurately perform tooth color comparison in actual clinical practice. During the second training session, the user continues to use the corresponding pushing components 5 to sequentially push the five color cards 201 along the shaft 202 to rotate from horizontal to vertical, and then move them out of the box 2 to be exposed. The user needs to carefully observe each color plate 2011 in each color card 201 in the group. This training session is relatively difficult because changes in hue and saturation will increase the interference with brightness judgment. The user needs to accurately identify the subtle differences in brightness of the color plate 2011 amidst complex color changes. This helps improve the ability to accurately judge brightness in actual tooth color comparison, thereby improving the accuracy and reliability of color comparison. During the third set of training, the user adjusts the position of the corresponding color block 104 by moving the component 4, so that the color block 104 moves one by one to the top of different background plates 103 according to observation. The user needs to observe the color block 104 of the same brightness under five different backgrounds and analyze the influence of the background color on the brightness perception. Through this training, the user is trained to accurately identify the same brightness under the interference of different viewing backgrounds. This design can help the user understand the influence of background factors on brightness judgment, so as to more accurately perform tooth color comparison in different oral environments or lighting conditions, so that the user can more accurately identify the brightness of the teeth under different background conditions, reduce the interference of background factors on the color comparison results, and improve the accuracy and reliability of color comparison.

[0027] It is also possible to develop a corresponding mobile phone applet by combining modern digital technology, and input the color data of all color cards 201 and color blocks 104 into the applet. Users can upload photos of their teeth, and use AI algorithms to automatically identify the brightness range of the teeth and give corresponding color comparison suggestions. Users can choose appropriate groups for targeted training based on the color comparison suggestions, thereby enhancing the intelligence of color comparison training.

[0028] See also Figure 3 、 Figure 5 and Figure 7 As shown, the moving assembly 4 includes five screw rods 401 and five slide rails 402. The inner wall of the shell 1 is evenly provided with five strip grooves 101. The five screw rods 401 are respectively rotatably installed in the five strip grooves 101. The five slide rails 402 are respectively fixed to the other inner wall of the shell 1 by screws. The five screw rods 401 are each provided with a moving block 406. The five slide rails 402 are each provided with a slider 403. The two side walls of the five color blocks 104 are respectively connected to the color blocks 104 by connecting rods 405. The moving block 406 is connected to the slider 403, and one end of the five screw rods 401 is fixedly connected to the rotating shaft 404. The five rotating shafts 404 extend to the outside through the wall of the shell 1. The outer wall of the end of the five rotating shafts 404 away from the screw rods 401 is provided with a rubber sleeve 4041. The inner wall of each rubber sleeve 4041 is bonded to the outer wall of the rotating shaft 404, and the outer wall of each rubber sleeve 4041 is provided with anti-slip grooves. The top of the shell 1 is located at the opening and a transparent top plate 102 is rotatably installed.

[0029] When conducting the third group of training, the user selects the color block 104 to be moved as needed, then pinches the corresponding rubber sleeve 4041 with his fingers, rotates the rotating shaft 404, drives the connected screw rod 401 to rotate, and then drives the moving block 406 to move along the strip groove 101. At the same time, the color block 104 is moved under the drive of the connecting rod 405, and the slider 403 is driven by the connecting rod 405 to slide along the slide rail 402 to realize the movement of the color block 104 until the color block 104 moves above the background plate 103. Under this background, the user can observe the color contrast between the color block 104 and the background plate 103 through the transparent top plate 102 to conduct color comparison training. By adjusting the position of the color block 104, the influence of the colors of the five background plates 103 on the brightness perception is analyzed. Through this training, the color comparison skills are further improved to ensure greater accuracy in actual operation.

[0030] See also Figure 3 、 Figure 4 、 Figure 6 and Figure 8 As shown, the inner top walls of the two boxes 2 are fixed with a first magnet 204, and the side wall of a color plate 2011 of each color card 201 away from the top plate 2012 and close to the inner top wall of the box 2 is embedded with a first iron sheet 2013, and the first magnet 204 is magnetically attracted to the first iron sheet 2013; A second magnet 205 is fixed to the inner wall of each of the two boxes 2 that are close to each other, and a second iron sheet 2014 is embedded in the side wall of each top plate 2012 away from the inner top wall of the box 2, and the second magnet 205 is magnetically attracted to the second iron sheet 2014; The pushing assembly 5 includes five L-shaped push rods 501, the long end top walls of the five L-shaped push rods 501 are in contact with the inner top wall of the box body 2, the long end bottom walls of the five L-shaped push rods 501 are in contact with the side wall of the color plate 2011, and the bottom of the short end outer wall of the five L-shaped push rods 501 are fixedly connected with a limiting block 504, and each of the opposite outer walls of the box body 2 is evenly opened with five movable grooves 203, and each movable groove 203 is installed with a vertical guide rod 505. The blocks 504 are all passed through the guide rod 505, and the outer walls on both sides of each of the limiting blocks 504 are in contact with the groove walls of the movable groove 203 and are slidably connected. The end of each of the limiting blocks 504 away from the L-shaped push rod 501 passes through the movable groove 203 and is fixed with a push block 506. The bottom of the short end of each of the L-shaped push rods 501 is bonded with a support spring 502, and the bottom end of each of the support springs 502 is bonded with a fixing plate 503. The outer wall of the fixing plate 503 is fixedly connected to the inner wall of the box body 2.

[0031] In a normal state, the color card 201 is in a horizontal state in the box body 2 and is restricted in the box body 2 by the magnetic attraction of the first magnet 204 and the first iron sheet 2013. When the user performs the first or second group of color comparison training, the push block 506 can be manually pushed. The push block 506 drives the limiting block 504 to slide along the guide rod 505 in the movable groove 203, driving the connected L-shaped push rod 501 to move downward and compress the support spring 502. The long end of the L-shaped push rod 501 pushes the contacting color plate 2011 to move, so that the first iron sheet 2013 is separated from the first magnet 204, and the color plate 2011 is moved. The top plate 2012 connected to the housing 11 rotates around the shaft 202, changing the angle of the color card 201. The color card 201 continues to rotate under the action of gravity (when the housing 1 is held by hand) or manually (when the housing 1 is placed on its side on a table) until it is in a vertical position. At this time, the second magnet 205 contacts the second iron plate 2014 for magnetic attraction, stabilizing the color card 201 in the vertical position. The user can then perform color comparison observation. After the L-shaped push rod 501 releases the push block 506, the compressed support spring 502 pushes the L-shaped push rod 501, the limit block 504, and the push block 506 upward and reset for the next use. When the color card 201 needs to be restored to a horizontal state, the color card 201 is manually pushed to rotate in the opposite direction around the shaft 202 and moved into the box 2 to a horizontal state. The first iron piece 2013 and the first magnet 204 are re-adsorbed to ensure that the color card 201 is stable. The entire device is exquisitely designed and easy to operate, effectively improving the accuracy and efficiency of color comparison training.

[0032] The working principle of the present invention is: During the first or second group training, the user manually pushes the push block 506, which drives the limit block 504 to slide along the guide rod 505 in the movable groove 203, driving the connected L-shaped push rod 501 to move downward and compress the support spring 502. The long end of the L-shaped push rod 501 pushes the contacted color plate 2011 to move, so that the first iron plate 2013 is separated from the first magnet 204, and the top plate 2012 connected to the color plate 2011 rotates around the shaft 202, changing the angle of the color card 201. The color card 201 continues to rotate under the action of gravity (when the housing 1 is held by hand) or manually (when the housing 1 is placed on the table) until it is in a vertical state. At this time, the second magnet 205 contacts the second iron plate 2014 for magnetic attraction, so that the color card 201 is stable in the vertical state. Then the user compares the colors to observe whether their brightness is the same. During the third set of training, the user selects the color block 104 they want to move as needed, then pinches the corresponding rubber sleeve 4041 with their fingers, rotates the rotating shaft 404, drives the connected screw rod 401 to rotate, and then drives the moving block 406 to move along the strip groove 101. At the same time, the color block 104 moves under the drive of the connecting rod 405, and the slider 403 is driven by the connecting rod 405 to slide along the slide rail 402 to realize the movement of the color block 104 until the color block 104 moves above the background plate 103. The user can observe the color contrast between the color block 104 and the background plate 103 through the transparent top plate 102 under this background, and conduct color comparison training. By adjusting the position of the color block 104, the user can analyze the influence of the background color on the brightness perception through five different background plates 103. Through this training, the user is trained to accurately identify the same brightness under the interference of different viewing backgrounds.

[0033] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A dental lightness training color chart, comprising a shell (1), two boxes (2) with bottom openings, and a motion mechanism (3), wherein the shell (1) is provided with five background plates (103) of different colors and five color blocks (104) of different colors, and the two boxes (2) are both provided with five rotating color cards (201) via shafts (202), and the shell (1) and the two boxes (2) are both provided with a motion mechanism (3), and the motion mechanism (3) is used to control the movement of the color blocks (104) and the color cards (201) for performing lightness contrast training, characterized in that: The top of the shell (1) is provided with an opening, the five background plates (103) are all embedded in the inner bottom wall of the shell (1) at the opening, the five color blocks (104) are stacked and arranged at a corner position at one end of the internal space of the shell (1), and each color card (201) is composed of five color plates (2011) and a top plate (2012), and the top plate (2012) is rotatably sleeved on the shaft (202); The five color cards (201) in one box (2) have the same brightness but different hues and saturations, and the five color cards (201) in another box (2) have different brightness, hues, and saturations; The motion mechanism (3) is composed of a moving component (4) and a pushing component (5). The moving component (4) is arranged in the housing (1) for moving five stacked color blocks (104) separately, and the pushing component (5) is arranged in the box (2) for pushing the color cards (201) one by one.

2. The dental lightness training color chart according to claim 1, characterized in that: The moving assembly (4) includes five screw rods (401) and five slide rails (402). Five strip grooves (101) are evenly opened on the inner wall of the shell (1). The five screw rods (401) are rotatably installed in the five strip grooves (101). The five slide rails (402) are fixed to the other inner wall of the shell (1) by screws. The five screw rods (401) are each sleeved with a moving block (406). The five slide rails (402) are each installed with a slider (403). The two side walls of the five color blocks (104) are respectively connected to the moving block (406) and the slider (403) by connecting rods (405).

3. The dental lightness training color chart according to claim 2, characterized in that: One end of the five screw rods (401) is fixedly connected to a rotating shaft (404), and the five rotating shafts (404) all extend through the wall of the shell (1) to the outside. The outer wall of one end of the five rotating shafts (404) away from the screw rods (401) is provided with a rubber sleeve (4041), the inner wall of each rubber sleeve (4041) is bonded to the outer wall of the rotating shaft (404), and the outer wall of each rubber sleeve (4041) is provided with anti-slip grooves.

4. The dental lightness training color chart according to claim 1, characterized in that: The two boxes (2) are fixed on the lower surface of the shell (1), and the two boxes (2) are arranged in parallel and staggered. The upper surface of the shell (1) is located at the opening and the outer walls of the opposite long sides of the two boxes (2) are both adhered with marking stickers (6).

5. The dental lightness training color chart according to claim 4, characterized in that: The inner top walls of the two boxes (2) are both fixed with a first magnet (204), and the side wall of a color plate (2011) in each color card (201) that is away from the top plate (212) and close to the inner top wall of the box (2) is both embedded with a first iron plate (213), and the first magnet (204) and the first iron plate (2013) are magnetically attracted; A second magnet (205) is fixed to the inner walls of the two boxes (2) on the sides close to each other, and a second iron sheet (2014) is embedded in the side wall of each top plate (2012) away from the inner top wall of the box (2), and the second magnet (205) is magnetically attracted to the second iron sheet (2014).

6. The dental lightness training color chart according to claim 4, characterized in that: The pushing assembly (5) includes five L-shaped push rods (501), the long end top walls of the five L-shaped push rods (501) are in contact with the inner top wall of the box body (2), the long end bottom walls of the five L-shaped push rods (501) are in contact with the side wall of the color plate (2011), and the bottom of the short end outer wall of the five L-shaped push rods (501) are fixedly connected with a limiting block (504), and each of the opposite outer walls of the box body (2) is evenly opened with five movable grooves (203), and a vertical guide rod (505) is installed in each movable groove (203), and each limiting block (504) is passed through the guide rod (505).

7. The dental lightness training color chart according to claim 6, characterized in that: The outer walls on both sides of each limiting block (504) are in contact with the groove wall of the movable groove (203) and are in sliding connection. The end of each limiting block (504) away from the L-shaped push rod (501) passes through the movable groove (203) and is fixed with a push block (506).

8. The dental lightness training color chart according to claim 6, characterized in that: A support spring (502) is bonded to the bottom of the short end of each L-shaped push rod (501), and a fixing plate (503) is bonded to the bottom end of each support spring (502), wherein the outer wall of the fixing plate (503) is fixedly connected to the inner wall of the box body (2).

9. The dental lightness training color chart according to claim 1, characterized in that: Color-coded stickers (7) are bonded to the outer wall of the long side of the shell (1) and one side outer wall of each top plate (2012).

10. The dental lightness training color chart according to claim 1, characterized in that: A transparent top plate (102) is rotatably mounted on the top of the housing (1) at the opening.

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