Colorimeter auxiliary device and chromatic aberration measuring device

Abstract

The utility model relates to the technical field of chromatic aberration measurement, aims to solve the problem of how to improve the color measurement efficiency of dyed products, and provides a colorimeter auxiliary device and a chromatic aberration measurement device. The colorimeter auxiliary device comprises a cover body and a liquid discharge assembly. An opening is formed in the bottom surface of the cover body, the cover body is further provided with a liquid drainage cavity and a waterproof cavity, the liquid drainage cavity is communicated with the opening, the waterproof cavity is located on the side, away from the opening, of the liquid drainage cavity and used for installing a colorimeter, the cover body is provided with a transparent part, and the transparent part is arranged opposite to the opening and separates the liquid drainage cavity and the waterproof cavity. The liquid discharging assembly communicates with the liquid discharging cavity and is used for discharging liquid at the opening through the liquid discharging cavity. The colorimeter has the beneficial effects that the colorimeter can measure the color of a product below the liquid level, so that the product does not need to be taken out from the liquid when the color of the product is measured, and the color measurement efficiency of the dyed product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of color difference measurement, in particular to a color difference meter auxiliary device and a color difference measurement device. BACKGROUND

[0002] In order to measure the color of the product after dyeing, in the related art, the product is lifted out of the dyeing tank after dyeing, and then the color of the product is measured. If the measured color does not meet the requirements, the product needs to be put into the dyeing tank again for dyeing, resulting in a long measurement time.

[0003] For example, in the process of anodizing and dyeing of aluminum alloy, after the product is lifted out of the dyeing tank, it needs to be washed with water and left in the air, and then color measurement is performed, which takes a long time. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a color difference meter auxiliary device and a color difference measurement device to solve the problem of how to improve the color measurement efficiency of the product after dyeing.

[0005] According to one aspect of the present application, a color difference meter auxiliary device is provided, comprising a cover body and a liquid discharge assembly. The bottom surface of the cover body is provided with an opening, and the cover body is further provided with a liquid discharge cavity and a waterproof cavity. The liquid discharge cavity is in communication with the opening, and the waterproof cavity is located on the side of the liquid discharge cavity away from the opening and is used for installing a color difference meter. The cover body has a transparent part, which is arranged opposite to the opening and separates the liquid discharge cavity and the waterproof cavity. The liquid discharge assembly is connected to the liquid discharge cavity and is used for discharging liquid at the opening through the liquid discharge cavity.

[0006] The bottom of the cover body can extend into the liquid, and the liquid at the opening can be discharged through the liquid discharge assembly. Therefore, the color difference meter can be installed in the waterproof cavity and measure the color of the product below the opening through the transparent part. Since the color difference meter auxiliary device enables the color difference meter to measure the color of the product below the liquid surface, the product does not need to be taken out of the liquid when measuring the color, thereby improving the color measurement efficiency of the product after dyeing.

[0007] In one embodiment, the liquid discharge assembly comprises an air pipe and an air pump. One end of the air pipe is connected to the liquid discharge cavity, and the other end of the air pipe is connected to the air pump.

[0008] In one embodiment, the liquid discharge cavity is arranged outside the waterproof cavity near one end of the waterproof cavity close to the opening.

[0009] In one embodiment, the waterproof cavity comprises an axial cylindrical cavity and a tapered cavity. The transparent part defines a cavity bottom wall of one end of the tapered cavity away from the cylindrical cavity. From one end of the tapered cavity connected to the cylindrical cavity to the other end of the tapered cavity, the radial dimension of the tapered cavity gradually decreases. The liquid discharge cavity is arranged outside the tapered cavity. From one end of the liquid discharge cavity close to the cylindrical cavity to the other end of the liquid discharge cavity, the outer diameter and the inner diameter of the liquid discharge cavity gradually decrease.

[0010] In one of the embodiments, the cover body comprises an inner shell and an outer shell. The inner shell comprises a surrounding plate and a transparent part, and the surrounding plate and the transparent part enclose a waterproof cavity. The surrounding plate comprises an inner cylindrical part and a tapered part, and the tapered part is connected to the transparent part at an end away from the inner cylindrical part. The outer shell comprises an upper cylindrical part and a lower cylindrical part, and the upper cylindrical part is sleeved on the outer surface of the inner cylindrical part, and the lower cylindrical part is sleeved on the outer surface of the tapered part. The lower cylindrical part is radially spaced apart from the tapered part to define a liquid discharge cavity. An end surface of the lower cylindrical part away from the upper cylindrical part is a bottom surface.

[0011] In one of the embodiments, a plurality of contact portions are protruded on the bottom surface, and the plurality of contact portions are spaced apart from each other around the opening.

[0012] In one of the embodiments, from an end of the contact portion connected to the bottom surface to the other end of the contact portion, the cross-sectional area of the contact portion perpendicular to the extension direction of the cover body gradually decreases.

[0013] According to another aspect of the present application, a chromatic aberration measuring device is provided, which comprises a chromatic aberration auxiliary device according to any one of the above embodiments and a chromatic aberration instrument. The chromatic aberration instrument is at least partially inserted into the waterproof cavity, and an end of the chromatic aberration instrument close to the opening is provided with a lens and is attached to the side of the transparent part away from the liquid discharge cavity.

[0014] In one of the embodiments, an open end of the cover body away from the opening is provided with an open end, and the open end is in communication with the waterproof cavity. An end of the chromatic aberration instrument away from the opening is protruded out of the open end. The liquid discharge assembly comprises an air pipe and an air pump. One end of the air pipe is in communication with the liquid discharge cavity, and the other end of the air pipe is in communication with the air pump. The air pump is connected to the part of the chromatic aberration instrument outside the waterproof cavity.

[0015] In one of the embodiments, an adhesive is arranged between the chromatic aberration instrument and the transparent part. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 It is a structural schematic diagram of the chromatic aberration measuring device in an embodiment of the present application.

[0018] Figure 2 It is a structural schematic diagram of the chromatic aberration measuring device in an embodiment of the present application. Figure 1 It is a partial structural sectional view of the chromatic aberration measuring device in an embodiment of the present application (the product is additionally shown in the figure).

[0019] Figure 3 It is a partial structural sectional view of the chromatic aberration measuring device in an embodiment of the present application (the product is additionally shown in the figure). Figure 2Partial enlarged view of the color difference measuring device and the product in the embodiment shown.

[0020] Figure 4 For Figure 1 Structural schematic view of the color difference measuring device in the embodiment shown from another perspective.

[0021] Figure 5 For Figure 1 Structural schematic view of the color difference meter auxiliary device in the embodiment shown.

[0022] Figure 6 For Figure 5 Partial structural section view of the color difference meter auxiliary device in the embodiment shown.

[0023] Main element symbol explanation:

[0024] Color difference measuring device 100

[0025] Color difference meter auxiliary device 10

[0026] Cover 101

[0027] Inner shell 11

[0028] Surrounding plate 113

[0029] Inner cylindrical portion 1131

[0030] Conical portion 1132

[0031] Transparent portion 115

[0032] Outer shell 12

[0033] Upper cylindrical portion 121

[0034] Lower cylindrical portion 122

[0035] Bottom surface 1221

[0036] Opening 11a

[0037] Liquid discharge cavity 11b

[0038] Waterproof cavity 11c

[0039] Cylindrical cavity 11c1

[0040] Conical cavity 11c2

[0041] Open mouth 11e

[0042] Contact portion 13

[0043] Liquid discharge assembly 102

[0044] Air pipe 1021

[0045] Air pump 1022

[0046] color difference meter 20

[0047] lens 21

[0048] product 200

[0049] The following detailed description will further describe the present application with reference to the above-mentioned drawings. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0051] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are for purposes of illustration only.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0053] Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments can be combined with each other in the case of no conflict.

[0054] Embodiments

[0055] Figure 1 A structural schematic diagram of a color difference measuring device 100 in an embodiment of the present application is shown in FIG. 1. Figure 2 A structural schematic diagram of a color difference measuring device 100 in an embodiment of the present application is shown in FIG. 1. Figure 1 A partial structural sectional view of the color difference measuring device 100 in an embodiment is shown in FIG. 2 (a product 200 is additionally shown in the figure). Figure 3 A partial structural sectional view of the color difference measuring device 100 in an embodiment is shown in FIG. 2 (a product 200 is additionally shown in the figure). Figure 2 A partial enlarged view of the color difference measuring device 100 and the product 200 in the embodiment shown in FIG. 1 is shown in FIG. 3. Figure 4 A partial enlarged view of the color difference measuring device 100 and the product 200 in the embodiment shown in FIG. 1 is shown in FIG. 3. Figure 1 A structural schematic diagram of the color difference measuring device 100 in the embodiment shown in FIG. 1 from another perspective is shown in FIG. 4.

[0056] Referring toFigure 1 and Figure 2 The embodiment provides a color difference measuring device 100, which comprises a color difference meter auxiliary device 10 and a color difference meter 20. Figure 3 and Figure 4 As shown in the figures, the color difference meter auxiliary device 10 comprises a cover body 101 and a liquid discharge assembly 102, the bottom surface 111 of the cover body 101 is provided with an opening 11a, and the cover body 101 is further provided with a liquid discharge cavity 11b and a waterproof cavity 11c, wherein the liquid discharge cavity 11b is communicated with the opening 11a. The cover body 101 is provided with a transparent part 115, which is arranged opposite to the opening 11a and separates the liquid discharge cavity 11b and the waterproof cavity 11c. The liquid discharge assembly 102 is communicated with the liquid discharge cavity 11b and is used for discharging the liquid at the opening 11a through the liquid discharge cavity 11b.

[0057] The color difference meter 20 is at least partially inserted into the waterproof cavity 11c, and the color difference meter 20 is provided with a lens 21 at one end close to the opening 11a and is attached to the side of the transparent part 115 away from the liquid discharge cavity 11b.

[0058] In this way, the waterproof cavity 11c is arranged in the cover body 101 to accommodate the color difference meter 20, so as to avoid the influence of the liquid on the color difference meter 20 during the measurement. The cover body 101 is provided with the transparent part 115, so that the end of the color difference meter 20 provided with the lens 21 can be attached to the transparent part 115, so that the color of the product 200 can be measured through the transparent part 115. The liquid discharge cavity 11b is arranged on the side of the transparent part 115 away from the waterproof cavity 11c, the liquid discharge cavity 11b is communicated with the outside of the cover body 101 through the opening 11a, and the opening 11a is opposite to the transparent part 115, so that during use, the end of the cover body 101 provided with the opening 11a can be inserted into the liquid (such as dyeing liquid), and the opening 11a is close to the to-be-measured area of the product 200, then the liquid at the opening 11a is discharged through the liquid discharge assembly 102, that is, the liquid between the transparent part 115 and the to-be-measured area of the product 200 is discharged, so as to avoid the influence of the color of the liquid on the color difference meter 20 measuring the color of the product 200. Since the waterproof cavity 11c and the liquid discharge cavity 11b are not communicated with each other, when the bottom end of the cover body 101 is inserted into the liquid, the liquid cannot enter the waterproof cavity 11c, and the lens 21 of the color difference meter 20 measures the color of the product 200 through the transparent part 115, so as to realize the underwater measurement of the product 200.

[0059] Therefore, when the product 200 is dyed in the dyeing tank, the bottom end of the cover body 101 can be stretched into the liquid surface of the dyeing tank, so as to measure the color of the product 200, and when the measured color of the product 200 reaches the requirement, the product 200 is lifted out of the dyeing tank for subsequent processing (for example, hole sealing). It should be noted that in the related art, when the color of the dyed product is measured, the measurement period is long. For example, in the aluminum alloy anodic oxidation dyeing process, after the product is dyed, the product is lifted out of the dyeing tank, washed with water, and then left for a period of time, and then the color difference value is measured manually. If the color is not up to standard, the product needs to be repeatedly lifted into and out of the dyeing tank for re-dyeing. This measurement process is time-consuming, and the dyed product is prone to flow marks and other defects when left for a period of time. In addition, the dyeing time is estimated by personnel experience, which is prone to under-dyeing or over-dyeing, resulting in large color difference of the product. The color difference measuring device 100 described above can measure the color of the product 200 under the dyeing liquid, improve the color measurement efficiency of the product 200, and help improve the yield of the product 200.

[0060] In some embodiments, as shown in Figure 2 the end of the cover body 101 away from the opening 11a has an opening 11e, and the opening 11e is in communication with the waterproof cavity 11c. The color difference meter 20 extends out of the opening 11e at the end away from the opening 11a. The liquid discharge assembly 102 includes an air pipe 1021 and an air pump 1022, as shown in Figure 3 one end of the air pipe 1021 is in communication with the liquid discharge cavity 11b, and the other end of the air pipe 1021 is in communication with the air pump 1022, and the air pump 1022 is connected to the part of the color difference meter 20 outside the waterproof cavity 11c. In this way, by connecting the air pump 1022 and the color difference meter 20, the integrity of the color difference measuring device 100 is good, and it is convenient to take. In other embodiments, the air pump 1022 can also not be connected to the color difference meter 20.

[0061] In some embodiments, an adhesive (not shown in the figure) is provided between the color difference meter 20 and the transparent part 115 to fix the color difference meter 20 relative to the transparent part 115, so as to avoid the lens 21 from shaking relative to the transparent part 115.

[0062] Figure 5 The structure of the color difference meter auxiliary device 10 in the embodiment shown in Figure 1 is shown in the structure schematic view; Figure 6 The partial structure cross-sectional view of the color difference meter auxiliary device 10 in the embodiment shown in Figure 5 .

[0063] Referring to Figure 5 and Figure 6As described above, the color difference meter auxiliary device 10 provided in the embodiment includes the cover body 101 and the liquid discharge assembly 102. The bottom surface 111 of the cover body 101 is provided with the opening 11a. The cover body 101 is further provided with the liquid discharge cavity 11b and the waterproof cavity 11c. The liquid discharge cavity 11b is in communication with the opening 11a. The waterproof cavity 11c is located on the side of the liquid discharge cavity 11b away from the opening 11a, and is used to install the color difference meter 20 (see Figure 4 ). The cover body 101 has a transparent part 115. The transparent part 115 is arranged opposite to the opening 11a, and separates the liquid discharge cavity 11b and the waterproof cavity 11c. The liquid discharge assembly 102 is in communication with the liquid discharge cavity 11b, and is used to discharge the liquid at the opening 11a through the liquid discharge cavity 11b.

[0064] The color difference meter auxiliary device 10 described above can be used to install the color difference meter 20 (see Figure 3 ) in the waterproof cavity 11c, and make the lens 21 of the color difference meter 20 close to the transparent part 115. Then, the liquid at the opening 11a is discharged through the liquid discharge assembly 102. Thus, the bottom end of the cover body 101 can be inserted into the liquid surface and close to the to-be-measured area of the product 200, so as to measure the color of the product 200 under the liquid surface. In this way, when the color of the dyed product 200 is measured, the product 200 does not need to be taken out of the dyeing tank during the dyeing process of the product 200, so as to improve the color measurement efficiency. Moreover, after the color of the product 200 reaches the requirement, the product 200 can be taken out of the dyeing tank for post-dyeing operation, so as to improve the yield of the product 200.

[0065] In some embodiments, as shown in Figure 5 and Figure 6 , the liquid discharge assembly 102 includes an air pipe 1021 and an air pump 1022. One end of the air pipe 1021 is in communication with the liquid discharge cavity 11b. The other end of the air pipe 1021 is in communication with the air pump 1022. In this way, the air pump 1022 can blow or suck air through the air pipe 1021, so as to form a vacuum negative pressure in the liquid discharge cavity 11b, and then empty the liquid at the opening 11a, so as to avoid the influence of the liquid at the opening 11a on the measurement of the color of the product 200 (see Figure 3 ). For example, when the air pump 1022 blows or sucks air at a gas pressure of 0.2 mega-pascal, the liquid at the opening 11a can be discharged in 3 to 5 seconds. It should be noted that during the measurement of the color difference meter 20, the air pump 1022 keeps blowing or sucking air to the liquid discharge cavity 11b, so as to keep the liquid discharge cavity 11b in a vacuum negative pressure.

[0066] In some embodiments, as shown in Figure 6As shown, the liquid discharge cavity 11b is arranged outside the waterproof cavity 11c at the end close to the opening 11a, so as to reduce the distance between the opening 11a and the transparent part 115, and further facilitate the liquid discharge assembly 102 to quickly discharge the liquid at the opening 11a, and improve the color measurement accuracy of the product 200.

[0067] In some embodiments, as shown in Figure 6 As shown, the waterproof cavity 11c includes an axial cylindrical cavity 11c1 and a tapered cavity 11c2, the transparent part 115 defines a cavity bottom wall at the end of the tapered cavity 11c2 away from the cylindrical cavity 11c1, and the radial dimension of the tapered cavity 11c2 gradually decreases from the end of the tapered cavity 11c2 connected to the cylindrical cavity 11c1 to the other end of the tapered cavity 11c2. The liquid discharge cavity 11b is arranged outside the tapered cavity 11c2, and the outer diameter and the inner diameter of the liquid discharge cavity 11b gradually decrease from the end of the liquid discharge cavity 11b close to the cylindrical cavity 11c1 to the other end of the liquid discharge cavity 11b. In this way, the radial dimension of the opening 11a is reduced, which further facilitates the liquid discharge assembly 102 to quickly discharge the liquid at the opening 11a, and further improves the color measurement accuracy of the product 200.

[0068] In some embodiments, as shown in Figure 6 As shown, the air pipe 1021 is connected to the end of the liquid discharge cavity 11b away from the opening 11a.

[0069] In some embodiments, as shown in Figure 5 and Figure 6 As shown, the cover body 101 includes an inner shell 11 and an outer shell 12. The inner shell 11 includes a surrounding plate 113 and a transparent part 115, and the surrounding plate 113 and the transparent part 115 surround the waterproof cavity 11c. The surrounding plate 113 includes an inner cylindrical part 1131 and a tapered part 1132, and the end of the tapered part 1132 away from the inner cylindrical part 1131 is connected to the transparent part 115. The outer shell 12 includes an upper cylindrical part 121 and a lower cylindrical part 122, the upper cylindrical part 121 is sleeved outside the inner cylindrical part 1131, the lower cylindrical part 122 is sleeved outside the tapered part 1132, and the lower cylindrical part 122 is arranged radially spaced apart from the tapered part 1132 to define the liquid discharge cavity 11b. The end face of the lower cylindrical part 122 away from the upper cylindrical part 121 is the bottom face 111. In this way, by arranging the inner shell 11 and the outer shell 12, the inner shell 11 and the outer shell 12 are respectively facilitated to be processed.

[0070] In some embodiments, the thickness of the transparent part 115 is 0.5mm to 1.5mm, for example, 1mm. The sum of the thicknesses of the inner cylindrical part 1131 and the upper cylindrical part 121 is 3.5mm to 4.5mm, for example, 4mm.

[0071] Optionally, the inner shell 11 and the outer shell 12 can both be made of transparent material, such as transparent acrylic.

[0072] In some embodiments, as shown in Figure 4 The bottom surface 111 is provided with a plurality of contact portions 13, which are arranged at intervals around the opening 11a. In this way, the contact portions 13 are arranged to contact the product 200 (see Figure 3 ), so as to reduce the contact area between the color difference auxiliary device 10 and the product 200, so as to avoid the color measurement result being affected by the large contact area between the color difference auxiliary device 10 and the product 200. In use, the cover 101 is supported on the product 200 by the plurality of contact portions 13.

[0073] In some embodiments, as shown in Figure 3 and Figure 4 From one end of the contact portion 13 connected to the bottom surface 111 to the other end of the contact portion 13, the cross-sectional area of the contact portion 13 perpendicular to the extension direction of the cover 101 gradually decreases, so as to further reduce the contact area between the contact portion 13 and the product 200, thereby further improving the measurement accuracy of the color of the product 200.

[0074] In use, the distance between the region to be measured of the product 200 and the liquid surface can be set according to the needs of use, for example, it can be 2-10 cm. It should be noted that by reducing the distance between the product 200 and the liquid surface, the overall uniformity of the color difference measurement result can be further improved, and the error can be reduced.

[0075] In use, after the bottom of the cover 101 is inserted into the dyeing tank, the liquid at the opening 11a is discharged by the liquid discharge assembly 102, and the opening 11a is positioned to the region to be measured of the product 200, then the color difference meter 20 performs the first measurement, and then the measurement data is uploaded to the computer. After the computer compares the measurement data and the target data, it is determined whether the color of the product 200 meets the requirements. If it meets the requirements, the product 200 is taken out of the dyeing tank and subjected to subsequent processing. If it does not meet the requirements, the product 200 is allowed to continue dyeing, and the color difference measurement device 100 is allowed to continue measurement and feedback the measurement result.

[0076] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A colorimeter auxiliary device, characterized in that, include: The cover has an opening on its bottom surface, and also has a drain chamber and a waterproof chamber. The drain chamber is connected to the opening, and the waterproof chamber is located on the side of the drain chamber away from the opening and is used to install a colorimeter. The cover has a transparent part, which is arranged opposite to the opening and separates the drain chamber and the waterproof chamber. as well as, A drainage assembly, connected to the drainage chamber, is used to drain liquid from the opening through the drainage chamber.

2. The colorimeter auxiliary device according to claim 1, characterized in that: The drainage assembly includes an air pipe and an air pump; One end of the trachea is connected to the drainage chamber, and the other end of the trachea is connected to the air pump.

3. The colorimeter auxiliary device according to claim 1, characterized in that: The drainage cavity surrounds the outer side of the waterproof cavity near the opening.

4. The colorimeter auxiliary device according to claim 3, characterized in that: The waterproof cavity includes a cylindrical cavity and a conical cavity distributed along the axial direction. The transparent portion defines the bottom wall of the conical cavity away from the cylindrical cavity. From the end of the conical cavity connected to the cylindrical cavity to the other end of the conical cavity, the radial dimension of the conical cavity gradually decreases. The drainage chamber is arranged around the outside of the conical cavity. From one end of the drainage chamber near the cylindrical cavity to the other end of the drainage chamber, both the outer diameter and the inner diameter of the drainage chamber gradually decrease.

5. The colorimeter auxiliary device according to claim 1, characterized in that: The cover includes an inner shell and an outer shell; The inner shell includes a surrounding plate and a transparent portion, the surrounding plate and the transparent portion forming the waterproof cavity. The surrounding plate includes an inner cylindrical portion and a conical portion distributed along the axial direction, and the end of the conical portion away from the inner cylindrical portion is connected to the transparent portion. The outer shell includes an upper cylindrical portion and a lower cylindrical portion distributed along the axial direction. The upper cylindrical portion is sleeved outside the inner cylindrical portion, and the lower cylindrical portion is sleeved outside the conical portion. The lower cylindrical portion and the conical portion are arranged radially spaced to define the drainage chamber. The end face of the lower cylindrical portion away from the upper cylindrical portion is the bottom surface.

6. The colorimeter auxiliary device according to claim 1, characterized in that: The bottom surface is provided with a plurality of contact portions, which are arranged at intervals around the opening.

7. The colorimeter auxiliary device according to claim 6, characterized in that: From one end of the contact portion connected to the bottom surface to the other end of the contact portion, the cross-sectional area of ​​the contact portion perpendicular to the extending direction of the cover gradually decreases.

8. A color difference measuring device, characterized in that, include: The colorimeter auxiliary device as described in any one of claims 1 to 7; as well as, A colorimeter, at least partially inserted into the waterproof cavity, has a lens at one end near the opening and is attached to the side of the transparent portion away from the drainage cavity.

9. The color difference measuring device according to claim 8, characterized in that: The cover has an opening at the end away from the opening, and the opening communicates with the waterproof cavity; The end of the colorimeter furthest from the opening extends out of the opening; The drainage assembly includes an air pipe and an air pump; one end of the air pipe is connected to the drainage chamber, and the other end of the air pipe is connected to the air pump; the air pump is connected to the part of the colorimeter located outside the waterproof chamber.

10. The color difference measuring device according to claim 8, characterized in that: An adhesive is provided between the colorimeter and the transparent part.

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