Color contrast evaluation device

Abstract

The application relates to the technical field of color contrast evaluation devices, and discloses a color contrast evaluation device, which can drive a placing table to move through a driving rod, so that a detection personnel can observe and detect a sample on the placing table from multiple angles, multiple directions and multiple distances, and the detection effect on complex colors is improved.

Description

Technical Field

[0001] This application relates to the field of color contrast evaluation equipment technology, such as a color contrast evaluation device. Background Technology

[0002] With the continuous improvement of industrial manufacturing levels, the evaluation and control of each stage of product design has become increasingly standardized and refined. Color, as the primary visual element, plays a crucial role in shaping the differentiated appearance of products. In recent years, the effects of color injection molding and spraying processes have become increasingly diverse. Besides conventional solid colors or metallic effects, there are now more rich and three-dimensional color effects such as pearlescent iridescence and rainbow gradients. Therefore, the evaluation of color effect samples is becoming increasingly comprehensive and diversified.

[0003] In related technologies, it is generally necessary for inspectors to manually inspect samples by holding them at fixed angles, positions, and distances.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] In related technologies, existing manual inspection techniques can only be applied to samples with conventional solid colors or metallic colors. However, for more complex color effects such as iridescent pearl paint, dazzling metallic paint, and chameleon paint, multi-angle, multi-directional, and multi-distance observation is required for three-dimensional evaluation. This results in the unsatisfactory detection effect of existing inspection techniques on complex colors.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a color contrast evaluation device that can drive a placement stage to move via a drive rod, thereby assisting inspectors in observing and inspecting samples on the placement stage from multiple angles, directions, and distances, and improving the detection effect for complex colors.

[0009] This disclosure provides a color contrast evaluation device for evaluating the color contrast of a sample. The color evaluation device includes a base, a drive rod, and a placement stage. The base is equipped with a control device; the drive rod includes a fixed end and a movable end, the fixed end being mounted on the base; the placement stage is mounted on the movable end of the drive rod and is used to place the sample; wherein, the control device is electrically connected to the drive rod to control the movement of the movable end relative to the fixed end.

[0010] In some embodiments, the drive rod includes a support rod and a connecting rod. The support rod includes a fixed end fixedly mounted to the base and a first connecting end remote from the base; the connecting rod includes a second connecting end and a movable end, the second connecting end being movably connected to the first connecting end; wherein, a control device is used for moving the connecting rod relative to the support rod.

[0011] In some embodiments, the support rod is provided with a hollow guide groove, and the second connecting end and the first connecting end of the connecting rod are inserted into the guide groove; wherein, the connecting rod can extend out of the support rod along the guide groove or retract into the support rod.

[0012] In some embodiments, the drive rod further includes a drive device. The drive device is driven to connect with the connecting rod to move the connecting rod along the guide groove.

[0013] In some embodiments, a limiting part is provided at the position of the guide groove near the first connecting end; a limiting mating part is provided at the position of the connecting rod near the second connecting end; when the connecting rod extends to the limit position, the limiting part stops the limiting mating part, thereby limiting the connecting rod.

[0014] In some embodiments, the drive rod further includes an angle deflection module. The angle deflection module is disposed at the movable end and is driven connected to the placement stage; wherein, the control device is also electrically connected to the angle deflection module to control the angle deflection module to drive the placement stage to rotate.

[0015] In some embodiments, the angle deflection module drives the placement platform to rotate by an angle greater than or equal to 30° and less than or equal to 60°.

[0016] In some embodiments, the color contrast evaluation apparatus further includes a fixing device. The fixing device is detachably mounted on the placement stage; when the fixing device is mounted on the placement stage, the fixing device is at least partially located on the side of the sample facing away from the placement stage, so as to fix the sample to the placement stage.

[0017] In some embodiments, the placement stage is configured as a magnetic material, and the fixing device is configured as a magnetic material; wherein the fixing device is used to attach the sample to the placement stage from the side of the sample away from the placement stage.

[0018] In some embodiments, the color contrast evaluation device includes multiple sets of drive rods and a placement stage; wherein a control device is electrically connected to multiple drive rods respectively to control the movement of the movable end of any drive rod.

[0019] The color contrast evaluation device provided in this disclosure can achieve the following technical effects:

[0020] This disclosure provides a color contrast evaluation device for evaluating the color contrast of samples. The color evaluation device includes a base, a drive rod, and a placement stage. The base is equipped with a control device; the drive rod includes a fixed end and a movable end, with the fixed end mounted on the base; the placement stage is mounted on the movable end of the drive rod and is used to place the sample; wherein, the control device is electrically connected to the drive rod to control the movement of the movable end relative to the fixed end. In this way, the user can first place the sample on the placement stage, and then control the movement of the movable end of the drive rod relative to the fixed end through the control device, thereby moving the placement stage and the sample. This configuration allows the placement stage to be moved by the drive rod, assisting the inspector in observing and inspecting the sample on the placement stage from multiple angles, directions, and distances, improving the detection effect for complex colors.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a color contrast evaluation device provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of a drive rod and a placement platform provided in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of a drive rod provided in an embodiment of this disclosure;

[0026] Figure 4 This is a schematic diagram of the structure of a control panel provided in an embodiment of this disclosure;

[0027] Figure 5 This is a schematic diagram of another color contrast evaluation device provided in an embodiment of this disclosure;

[0028] Figure 6 This is a schematic diagram of another color contrast evaluation device provided in an embodiment of this disclosure.

[0029] Figure label:

[0030] 10: Base; 11: Housing; 12: Control Panel;

[0031] 20: Drive rod; 21: Support rod; 211: Guide groove; 212: Limiting part; 22: Connecting rod; 221: Limiting mating part; 23: Angle deflection module;

[0032] 31: Placement platform; 32: Fixing device; 33: Sample. Detailed Implementation

[0033] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0034] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0035] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0036] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0037] Unless otherwise stated, the term "multiple" means two or more.

[0038] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0039] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0041] like Figures 1 to 6 As shown, this embodiment of the present disclosure provides a color contrast evaluation device, which can drive the placement stage 31 to move via the drive rod 20, so as to assist the tester in observing and testing the sample 33 on the placement stage 31 from multiple angles, directions and distances, thereby improving the detection effect for complex colors.

[0042] like Figures 1 to 6 As shown, this embodiment of the disclosure provides a color contrast evaluation device for evaluating the color contrast of a sample 33. The color evaluation device includes a base 10, a drive rod 20, and a placement platform 31. The base 10 is equipped with a control device; the drive rod 20 includes a fixed end and a movable end, the fixed end being mounted on the base 10; the placement platform 31 is mounted on the movable end of the drive rod 20 and is used to place the sample 33; wherein, the control device is electrically connected to the drive rod 20 to control the movement of the movable end relative to the fixed end.

[0043] Specifically, the base 10 includes a housing 11, and the control device is disposed inside the housing 11. The fixed end of the drive rod 20 is fixedly installed on the upper surface of the housing 11, and the drive rod 20 is arranged perpendicular to the upper surface of the housing 11. The control device can control the movable end of the drive rod 20 to move relative to the fixed end, and the movable end of the drive rod 20 can drive the placement platform 31 to move. The placement platform 31 is installed on the movable end of the drive rod 20, and the side of the placement platform 31 facing away from the drive rod 20 forms a placement surface, on which the user can place the sample 33 for observation and testing.

[0044] After the user places the sample 33 on the placement surface, the user can send a control command to the control device to control the drive rod 20 to move the placement stage 31, so that the sample 33 and the user present different angles and distances. This setup allows the color contrast evaluation device to assist the inspector in observing and inspecting the sample 33 on the placement stage 31 from multiple angles, directions, and distances, improving the inspection effect for complex colors.

[0045] Optionally, a control panel 12 is provided on one side wall of the housing 11, which is used to send control commands to the control device.

[0046] Specifically, the control panel 12 is equipped with multiple buttons, allowing users to issue control commands to the control device. For example, the control panel 12 includes a motion button and a stop button. When the user presses the motion button, they send a motion command to the control device. Upon receiving the motion command, the control device controls the drive lever 20 to move the placement stage 31 along a preset trajectory, thereby creating different angles and distances between the sample 33 and the user. The user can also press the stop button to send a stop command to the control device. Upon receiving the stop command, the control device controls the drive lever 20 to stop moving, allowing the user to observe the sample 33 in the prohibited state.

[0047] like Figure 4 As shown, optionally, the control panel 12 is equipped with light sources for each of the multiple buttons. In the initial state, all the buttons are normally dark. After the user presses the motion button, the motion button becomes constantly lit, and the control panel 12 sends a motion command to the control device.

[0048] Optionally, the housing 11 of the base 10 is made of ABS plastic, and the overall color of the housing 11 is configured as a neutral light gray. Similarly, the placement stage 31 is made of ABS plastic, and the overall color of the placement stage 31 is configured as a neutral light gray. It is understood that configuring the colors of the base 10 and the placement stage 31 as neutral light gray can prevent the colors of the base 10 and the placement stage 31 from interfering with the user's observation and inspection of the sample 33.

[0049] like Figures 2 to 3 As shown, in some embodiments, the drive rod 20 includes a support rod 21 and a connecting rod 22. The support rod 21 includes a fixed end fixedly mounted to the base 10 and a first connecting end away from the base 10; the connecting rod 22 includes a second connecting end and a movable end, the second connecting end being movably connected to the first connecting end; wherein, a control device is used for the movement of the connecting rod 22 relative to the support rod 21.

[0050] Specifically, the end of the support rod 21 facing the base 10 constitutes a fixed end, which is fixedly installed on the base 10, and the support rod 21 is perpendicular to the upper surface of the base 10. The end of the support rod 21 facing away from the base 10 is a first connecting end, and the second connecting end of the connecting rod 22 is movably connected to the first connecting end, so that the connecting rod 22 can move relative to the support rod 21. The end of the connecting rod 22 facing away from the support rod 21 constitutes a movable end, and the placement platform 31 is installed on the movable end of the connecting rod 22. For example, the connecting rod 22 can move relative to the support rod 21 in a direction away from or towards the base 10, thereby driving the placement platform 31 to move in a direction away from or towards the base 10, such as... Figure 5 As shown.

[0051] like Figure 3 As shown, in some embodiments, the support rod 21 is provided with a hollow guide groove 211, and the second connecting end and the first connecting end of the connecting rod 22 are inserted into the guide groove 211; wherein, the connecting rod 22 can extend out of the support rod 21 along the guide groove 211 or retract into the support rod 21.

[0052] Specifically, the support rod 21 is provided with a hollow guide groove 211, which extends axially along the support rod 21. The first connecting end of the support rod 21 has an opening communicating with the guide groove 211. The second connecting end of the connecting rod 22 can be inserted into the guide groove 211 through the opening of the first connecting end, allowing the connecting rod 22 to slide along the guide groove 211 in a direction away from or towards the base 10. For example, when it is necessary to increase the distance between the placement platform 31 and the user, the connecting rod 22 can be controlled to slide along the guide groove 211 towards the base 10, causing the connecting rod 22 to retract into the guide groove 211; when it is necessary to shorten the distance between the placement platform 31 and the user, the connecting rod 22 can be controlled to slide along the guide groove 211 away from the base 10, causing the connecting rod 22 to extend out of the guide groove 211. With this configuration, the distance between the placement platform 31 and the user can be adjusted by extending the connecting rod 22 out of or retracting it into the support rod 21, enabling multi-distance observation and testing of the sample 33.

[0053] In some embodiments, the drive rod 20 further includes a drive device. The drive device is driven to connect to the connecting rod 22 to drive the connecting rod 22 to move along the guide groove 211.

[0054] Specifically, the control device is electrically connected to the drive device, and the user can control the drive device to drive the connecting rod 22 to move along the guide groove 211. The drive device can be a pneumatic drive device or a hydraulic drive device.

[0055] In some practical applications, the driving device is a pneumatic drive device, which includes an air pump installed on the base 10. A seal can be provided between the connecting rod 22 and the guide groove 211 to configure the guide groove 211 as a sealed cavity. In this case, the air pump can directly inflate or depress the guide groove 211 to drive the connecting rod 22 to move away from or towards the base 10. Alternatively, a separate cylinder can be installed in the guide groove 211, with the cylinder drivingly connected to the second connecting end of the connecting rod 22. The air pump can inflate or depress the cylinder to drive the connecting rod 22 to move away from or towards the base 10.

[0056] In other practical applications, the drive device is a hydraulic drive device, which includes an oil pump and an oil tank disposed on the base 10. Simultaneously, a seal can be provided between the connecting rod 22 and the guide groove 211 to configure the guide groove 211 as a sealed cavity. In this case, the oil pump can directly fill or extract hydraulic oil into the guide groove 211 to drive the connecting rod 22 to move away from or towards the base 10. Alternatively, a separate oil cylinder can be provided in the guide groove 211, and the oil cylinder is driven to the second connecting end of the connecting rod 22. The oil pump can fill or extract hydraulic oil into the oil cylinder to drive the connecting rod 22 to move away from or towards the base 10.

[0057] In other practical applications, the driving device is a mechanical drive device, that is, the driving device includes mechanical drive structures such as gears, racks, or connecting rods. The driving device is connected to the connecting rod 22 through the mechanical drive structure, thereby driving the connecting rod 22 to move away from or towards the base 10.

[0058] Optionally, the control panel 12 includes an up button and a down button. Initially, both the up and down buttons are normally off. When the user presses the up button, it illuminates, and the control panel 12 sends an up command to the control device. Upon receiving the up command, the control device controls the drive mechanism to move the connecting rod 22 away from the base 10, thereby raising the placement platform 31. When the user presses the down button, it illuminates, and the control panel 12 sends a down command to the control device. Upon receiving the down command, the control device controls the drive mechanism to move the connecting rod 22 towards the base 10, thereby lowering the placement platform 31.

[0059] like Figure 3 As shown, in some embodiments, a limiting part 212 is provided at the position of the guide groove 211 near the first connecting end; a limiting mating part 221 is provided at the position of the connecting rod 22 near the second connecting end; when the connecting rod 22 extends to the limit position, the limiting part 212 stops the limiting mating part 221, thereby limiting the connecting rod 22.

[0060] Specifically, the limiting part 212 is provided with the inner wall of the guide groove 211 and is located near the first connecting end. The limiting mating part 221 is provided on the outer wall of the connecting rod 22 and is located near the second connecting end. When the connecting rod 22 extends to its limit position in the direction away from the base 10, the limiting part 212 stops the limiting mating part 221 to limit the connecting rod 22, thereby preventing the connecting rod 22 from continuing to extend in the direction away from the base 10 and causing the connecting rod 22 to disengage from the guide groove 211.

[0061] In some practical applications, the limiting part 212 and the limiting mating part 221 can be two corresponding limiting protrusions. When the connecting rod 22 extends to the limit position, the two limiting protrusions abut against each other to limit the connecting rod 22.

[0062] In other practical applications, the limiting part 212 can be a limiting groove, and the limiting mating part 221 can be a limiting protrusion. When the connecting rod 22 extends to its limit position, the limiting protrusion can be embedded in the limiting groove to limit the connecting rod 22.

[0063] In other practical applications, the limiting part 212 can be a limiting protrusion, and the limiting mating part 221 can be a limiting groove.

[0064] like Figure 3 As shown, in some embodiments, the drive rod 20 further includes an angle deflection module 23. The angle deflection module 23 is disposed at the movable end and is drivenly connected to the placement platform 31; wherein, the control device is also electrically connected to the angle deflection module 23 to control the angle deflection module 23 to drive the placement platform 31 to rotate.

[0065] Specifically, the angle deflection module 23 can be a rotating shaft, located at the movable end of the connecting rod 22, and the placement stage 31 is mounted on the movable end of the connecting rod 22 via the angle deflection module 23. In this way, the control device can control the angle deflection module 23 to drive the placement stage 31 to rotate around the movable end of the connecting rod 22, thereby adjusting the angle between the placement stage 31 and the user, and thus enabling multi-angle observation and inspection of the sample 33, such as... Figure 6 As shown.

[0066] Optionally, the control panel 12 also includes a rotation button, which is initially off. After the user presses the rotation button, the rotation button becomes on and the control panel 12 sends a rotation command to the control device. After receiving the rotation command, the control device controls the multi-angle deflection module 23 to drive the placement stage 31 to rotate forward, backward, left, or right, or to rotate the placement stage 31 clockwise or counterclockwise.

[0067] In some embodiments, the angle deflection module 23 drives the placement platform 31 to rotate by an angle greater than or equal to 30° and less than or equal to 60°.

[0068] Specifically, the angle deflection module 23 can drive the placement stage 31 to rotate between 30° and 60°. For example, the angle deflection module 23 can drive the placement stage 31 to rotate to 30°, 45° or 60°, which makes it more convenient for users to observe and inspect the sample 33.

[0069] In some practical applications, the angle deflection module 23 can drive the placement stage 31 to rotate to 45°. At this time, the user can control the angle deflection module 23 to drive the placement stage 31 to rotate forward 45°, backward 45°, left 45°, or right 45° through the control device.

[0070] like Figures 1 to 6 As shown, in some embodiments, the color contrast evaluation apparatus further includes a fixing device 32. The fixing device 32 is detachably mounted on the placement stage 31; when the fixing device 32 is mounted on the placement stage 31, the fixing device 32 is at least partially located on the side of the sample 33 facing away from the placement stage 31, so as to fix the sample 33 to the placement stage 31.

[0071] Specifically, the fixing device 32 is detachably installed on the placement platform 31. After the user places the sample 33 on the placement platform 31, the fixing device 32 can be installed on the placement platform 31. At this time, the fixing device 32 at least partially abuts against the sample 33 from the side of the sample 33 away from the placement platform 31, so as to cooperate with the placement platform 31 to fix the sample 33. When the user needs to remove the sample 33, the fixing device 32 can be removed from the placement platform 31 first, and then the sample 33 can be removed from the placement platform 31. This setting can prevent the sample 33 from slipping when the placement platform 31 moves, thus avoiding any situation that would affect the user's observation and testing.

[0072] like Figures 1 to 6 As shown, in some embodiments, the placement stage 31 is configured as a magnetic material, and the fixing device 32 is configured as a magnetic material; wherein the fixing device 32 is used to adhere to the placement stage 31 from the side of the sample 33 away from the placement stage 31.

[0073] Specifically, the placement platform 31 is made of a magnetic material, and the fixing device 32 is also made of a magnetic material. For example, the placement platform 31 can be made of materials such as iron, cobalt, or nickel, and the fixing device 32 is equipped with a permanent magnet so that it can be attracted to the placement platform 31. Thus, after the user places the sample 33 on the placement platform 31, the fixing device 32 can be attracted to the placement platform 31 from the side of the sample 33 facing away from it, thereby fixing the sample 33 to the placement platform 31. When the user needs to remove the sample 33, the fixing device 32 can be directly removed from the placement platform 31, and then the sample 33 can be removed from the placement platform 31. This design makes it more convenient for the user to install or remove the fixing device 32 from the placement platform 31.

[0074] like Figures 1 to 6 As shown, in some embodiments, the color contrast evaluation device includes multiple sets of drive rods 20 and a placement platform 31; wherein, the control device is electrically connected to the multiple drive rods 20 respectively to control the movement of the movable end of any drive rod 20.

[0075] Specifically, multiple sets of drive rods 20 and placement platforms 31 are respectively mounted on the base 10, and the control device is electrically connected to each of the drive rods 20. In this way, the user can place multiple samples 33 on multiple placement platforms 31 and then observe and test the multiple samples 33 simultaneously.

[0076] like Figure 4 As shown, optionally, the control panel 12 also includes multiple selection buttons, each corresponding to a different actuator 20. Thus, when the user presses any selection button, that button remains illuminated. Then, when the user presses the motion button, the control device can control the corresponding actuator 20 to move the placement platform 31.

[0077] like Figure 4 As shown, the control panel 12 may optionally include a "Select All" button. After the user presses the "Select All" button, the button remains lit. Then, the user presses the "Move" button, at which point the control device can simultaneously control multiple drive levers 20 to drive multiple placement platforms 31 to move.

[0078] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A color contrast evaluation apparatus for color contrast evaluation of a sample (33), characterized by The color evaluation device includes: The base (10) includes a housing (11) and is provided with a control device; A drive rod (20) includes a fixed end and a movable end, the fixed end being mounted on the base (10); and, A placement platform (31) is installed at the movable end of the drive rod (20), and the placement platform (31) is used to place the sample (33); The control device is electrically connected to the drive rod (20) to control the movement of the movable end relative to the fixed end.

2. The color contrast evaluation apparatus according to claim 1, characterized by, The drive rod (20) includes: The support rod (21) includes a fixed end fixedly mounted to the base (10) and a first connecting end remote from the base (10); and, The connecting rod (22) includes a second connecting end and a movable end, wherein the second connecting end is movably connected to the first connecting end; The control device is used to move the connecting rod (22) relative to the support rod (21).

3. The color contrast evaluation device according to claim 2, characterized in that, The support rod (21) is provided with a hollow guide groove (211), and the second connecting end and the first connecting end of the connecting rod (22) are inserted into the guide groove (211); The connecting rod (22) can extend out of the support rod (21) along the guide groove (211) or retract into the support rod (21).

4. The color contrast evaluation apparatus according to claim 3, characterized by The drive rod (20) also includes: The driving device is connected to the connecting rod (22) to drive the connecting rod (22) to move along the guide groove (211).

5. The color contrast evaluation device according to claim 3, characterized in that, A limiting part (212) is provided at a position near the first connecting end of the guide groove (211); and, A limiting fitting part (221) is provided on the connecting rod (22) near the second connecting end; When the connecting rod (22) extends to its limit position, the limiting part (212) stops the limiting mating part (221), thereby limiting the connecting rod (22).

6. The color contrast evaluation apparatus according to claim 1, characterized by The drive rod (20) also includes: An angle deflection module (23) is disposed at the movable end, and the angle deflection module (23) is drivenly connected to the placement platform (31); The control device is also electrically connected to the angle deflection module (23) to control the angle deflection module (23) to drive the placement platform (31) to rotate.

7. The color contrast evaluation device according to claim 6, characterized in that, The angle deflection module (23) drives the placement platform (31) to rotate by an angle greater than or equal to 30° and less than or equal to 60°.

8. The color contrast evaluation apparatus according to any one of claims 1 to 7, characterized by, Also includes: The fixing device (32) is detachably installed on the placement platform (31); When the fixing device (32) is installed on the placement table (31), the fixing device (32) is at least partially located on the side of the sample (33) away from the placement table (31) to fix the sample (33) to the placement table (31).

9. The color contrast evaluation device according to claim 8, characterized in that, The placement platform (31) is configured with a magnetic material, and the fixing device (32) is configured with a magnetic material; The fixing device (32) is used to attach the sample (33) to the placement platform (31) from the side away from the placement platform (31).

10. The color contrast evaluation apparatus according to any one of claims 1 to 7, characterized in that, The color contrast evaluation device includes multiple sets of the drive rods (20) and the placement platform (31); The control device is electrically connected to multiple drive rods (20) to control the movement of the movable end of any drive rod (20).

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