color difference meter

Abstract

The application provides a color difference meter, comprising a main body and a supporting structure, the main body is used for emitting measuring light, the bottom of the main body is provided with a measuring hole for the measuring light to emit, the supporting structure is arranged around the measuring hole, the supporting structure is installed on the main body, the bottom end of the supporting structure and the bottom end of the measuring hole are located on the same plane, and the side surface of the supporting structure is provided with at least one through alignment observation slot for observing the alignment state of the measuring hole and the measured area. The color difference meter provided by the application solves the technical problem that the measuring hole at the bottom of the color difference meter in the prior art is difficult to accurately align with the measured area.

Description

Technical Field

[0001] This application belongs to the field of color measurement technology, and more specifically, relates to a colorimeter. Background Technology

[0002] A handheld vertical colorimeter is an instrument for measuring the color difference of objects. It is easy to carry and simple to operate.

[0003] In related technologies, handheld vertical colorimeters are usually equipped with a measuring hole at the bottom. During measurement, the measuring hole is aligned with the sample surface. To ensure that the instrument can stand stably during use, colorimeters are usually designed with an enlarged bottom support surface. However, this method, with the enlargement of the bottom edge area, will obstruct the operator's line of sight to the relative position between the measuring hole and the measured area, affecting the accurate alignment of the measuring hole and the measured area, and affecting the measurement accuracy. Utility Model Content

[0004] The purpose of this application is to provide a colorimeter to solve the technical problem in the prior art where the measuring hole at the bottom of the colorimeter is difficult to accurately align with the area being measured.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a colorimeter is provided, comprising: a main body for emitting measuring light, wherein a measuring hole is provided at the bottom of the main body for the measuring light to be emitted; and a support structure surrounding the measuring hole, wherein the support structure is mounted on the main body, wherein the bottom end of the support structure and the bottom end of the measuring hole are located on the same plane, and at least one through alignment observation groove is provided on the side of the support structure for observing the alignment status between the measuring hole and the measured area.

[0006] In one alternative embodiment, the support structure includes at least two support legs, which are arranged at intervals around the measuring hole, and the gap between two adjacent support legs forms an alignment observation groove.

[0007] In one alternative embodiment, the support foot is an arc-shaped plate structure.

[0008] In one optional embodiment, the main body includes a housing and a base. The base is installed at the bottom of the housing. A measuring hole is provided in the central area of ​​the bottom of the base. A support structure is connected to the bottom of the base, and the bottom end of the support structure and the bottom end of the base are located on the same plane.

[0009] In one optional embodiment, the base includes a connecting part, a mounting part, and a measuring part connected in sequence. The connecting part is connected to the housing, the mounting part has a receiving space, the measuring part is connected to the central area of ​​the mounting part, the measuring part has a measuring hole communicating with the receiving space, and the support structure is connected to the peripheral area of ​​the mounting part. The bottom end of the support structure and the bottom end of the measuring part are located on the same plane.

[0010] In one alternative embodiment, the cross-sectional area of ​​the mounting portion gradually decreases from the end closest to the housing towards the direction away from the housing. The measuring portion is connected to the lower end face of the mounting portion and extends in a direction away from the housing. The support structure is connected to the side of the mounting portion and is located around the measuring portion.

[0011] In one alternative embodiment, the cross-sectional area of ​​the measuring section gradually decreases from the end closest to the housing towards the direction away from the housing.

[0012] In an optional embodiment, the colorimeter further includes a calibration cover, which is detachably connected to the base. A calibration white plate is provided on the side of the calibration cover facing the base, and the calibration white plate is set in correspondence with the measurement hole.

[0013] In one optional embodiment, the main body further includes an upper shell, a mounting base, and a test cover. The mounting base is mounted on the bottom of the upper shell and has a through hole for transmitting measurement light. The test cover is detachably connected to the upper shell or the mounting base and has a measurement hole in the central area. A support structure is connected to the bottom of the test cover.

[0014] In an optional embodiment, the colorimeter further includes a transparent positioning plate, which includes a positioning part and an extension connected to the positioning part. The positioning part has a positioning hole, and the transparent positioning plate is fitted onto the outer periphery of the measuring hole through the positioning hole. The extension passes through the alignment observation groove and extends outward to the outside of the main body.

[0015] The beneficial effects of the colorimeter provided in this application are as follows: Compared with the prior art, the colorimeter of this application embodiment has a support structure at the bottom of the main body. The support structure surrounds the measuring hole, and its bottom end is located on the same plane as the bottom end of the measuring hole. During measurement, it can ensure that the instrument can stand stably on the table and that the end face of the measuring hole is in close contact with the area being measured. At the same time, a through alignment observation groove is provided on the side of the support structure, which allows the operator to observe the alignment status of the measuring hole and the area being measured from the side. This effectively solves the problem of obstruction of vision caused by the expansion of the bottom area, significantly improves measurement efficiency and measurement accuracy. The structure is simple, requires no additional parts, and has high reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of the colorimeter provided in the embodiments of this application. Figure 1 ; Figure 2A schematic diagram of the overall structure of the colorimeter provided in the embodiments of this application. Figure 2 ; Figure 3 Exploded view of the colorimeter provided in the embodiments of this application Figure 1 ; Figure 4 Exploded view of the colorimeter provided in the embodiments of this application Figure 2 ; Figure 5 This is a schematic diagram of the structure of the base provided in an embodiment of this application; Figure 6 A cross-sectional view of the base provided in an embodiment of this application; Figure 7 A rear view of a colorimeter provided in an embodiment of this application; Figure 8 This is a partial structural schematic diagram of a colorimeter provided in an embodiment of this application; Figure 9 This is an exploded view of a portion of the colorimeter structure provided in an embodiment of this application.

[0018] The following are the labeling elements in the figure: 100-Colorimeter; 10-Main body; 11-House; 12-Base; 121-Connecting part; 122-Mounting part; 1221-Accommodation space; 123-Measuring part; 1231-Measuring hole; 13-Display screen; 20-Supporting structure; 21-Supporting foot; 22-Alignment observation slot; 30-Calibration cover; 31-Calibration white board; 40-Transparent positioning plate; 41-Positioning part; 411-Positioning hole; 42-Extension part. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] A handheld vertical colorimeter is an instrument for measuring color differences in objects, characterized by its portability and ease of operation. In related technologies, handheld vertical colorimeters typically have a measuring hole at the bottom, which is aligned with the sample surface during measurement. To ensure the instrument remains stable and upright during use, colorimeters often employ a design that enlarges the bottom support surface. However, this enlargement of the bottom edge area can obstruct the operator's view of the relative position between the measuring hole and the measured area, affecting the accurate alignment of the measuring hole and the measured area, and thus impacting measurement accuracy.

[0024] In addition, handheld vertical colorimeters are stabilized by using a transparent plate at the bottom. The transparent plate helps to stabilize the casing and allows the line of sight to align the measuring hole with the area being measured. However, this method requires additional processing of the transparent part, which is fixed to the lower end of the colorimeter with glue or screws, increasing the cost of the parts. Furthermore, the transparent part is relatively brittle and easily broken or damaged by drops or impacts.

[0025] Please refer to the following: Figures 1 to 9 The colorimeter 100 provided in this application embodiment will now be described. The colorimeter 100 includes: a main body 10 for emitting measuring light, and a measuring hole 1231 provided at the bottom of the main body 10 for the measuring light to be emitted; and a support structure 20 arranged around the measuring hole 1231, the support structure 20 being mounted on the main body 10, the bottom end of the support structure 20 being located on the same plane as the bottom end of the measuring hole 1231, and at least one through alignment observation groove 22 provided on the side of the support structure 20 for observing the alignment status between the measuring hole 1231 and the measured area.

[0026] The main body 10 refers to the upper housing of the colorimeter 100, which is usually designed in a columnar or hand-held shape. The top of the main body 10 is equipped with a touch screen and a display screen 13 for the measurement operation and display of the instrument. The main body 10 integrates circuit boards, batteries, light sources and detectors, etc. The internal optical path structure can adopt a D / 8° integrating sphere structure or a 45° / 0° ring structure, etc.

[0027] The measuring hole 1231 is a through hole located at the bottom of the main body 10. A light source within the main body 10 emits measuring light, which is emitted through the measuring hole 1231, and the hole also receives reflected light from the sample. The measuring hole 1231 can be configured with a fixed aperture, suitable for standard measurement scenarios. The aperture of the measuring hole 1231 can be set as needed, such as to 4mm or 8mm. Switching between different apertures can also be achieved by using a replaceable test cover, enhancing the instrument's flexibility.

[0028] The support structure 20 is mounted on the main body 10 and surrounds the measuring hole 1231. The support structure 20 is located at the bottom of the instrument and is used to support the entire instrument to stand stably and upright on the sample surface. The support structure 20 can be directly fixed to the lower end of the main body 10 by riveting, threaded connection or other means, or it can be connected through an intermediate component.

[0029] The bottom end of the support structure 20 and the bottom end of the measuring hole 1231 are on the same plane, that is, they are coplanar. During measurement, it can ensure that the end face of the test hole is in close contact with the object being measured, and the instrument can stand stably on the table.

[0030] The support structure 20 can be configured as an annular support base with a through alignment observation slot 22 on the side of the annular support base; it can also be configured as a multi-segment arc support base, which, due to the interval arrangement of the multi-segment arc support base, can ensure the field of view while providing stable support; it can also be configured as a tripod, which has good stability and a wide field of view.

[0031] A through alignment observation slot 22 is provided on the side of the support structure 20 to provide a lateral observation window, allowing the operator to observe the relative position between the measuring hole 1231 and the object being measured from the side, which facilitates the judgment of whether the alignment is accurate and avoids measurement deviation.

[0032] The alignment observation slot 22 can be directly slotted on the annular base 12 or the support foot 21, or an observation channel can be formed by utilizing the gap between multiple support seats. The alignment observation slot 22 can be a long strip, a circle, or a U-shape, etc., for easy observation. Multiple alignment observation slots 22 can be set to allow observation from multiple directions.

[0033] By setting the bottom end of the support structure 20 and the bottom end of the measuring hole 1231 on the same plane, the measurement reference plane and the support plane are unified. The coplanar design ensures that the distance between the measuring hole 1231 and the sample remains consistent when the instrument is placed on the sample surface, avoiding measurement distance deviation caused by the support plane being too high or too low, thereby improving the repeatability of the measurement and the accuracy of the data.

[0034] By setting the alignment observation groove 22 on the side of the support structure 20, the problem of the traditional colorimeter 100 obstructing the view due to the enlarged bottom is effectively solved. The operator can clearly see the relative position between the measurement hole 1231 and the sample measurement area 1 through the alignment observation groove 22 from the side without tilting or lifting the instrument. This facilitates quick and accurate alignment operation, improving measurement efficiency and user experience.

[0035] The support structure 20 can not only stably support the instrument, but also realize the observation path through slots or gaps. No additional parts are needed. The structure is simple, low in cost, and highly reliable.

[0036] During use, the operator only needs to bring the instrument vertically close to the sample, and after confirming that the measuring hole 1231 is aligned with the target area through the side observation groove, press down steadily to make the support structure 20 and the measuring hole 1231 contact the surface for measurement. The process is intuitive, fast and stable.

[0037] Compared with the prior art, the colorimeter 100 provided in this application embodiment has a support structure 20 at the bottom of the main body 10. The support structure 20 surrounds the measuring hole 1231 and its bottom end is located on the same plane as the bottom end of the measuring hole 1231. During measurement, it can ensure that the instrument can stand stably on the table and that the end face of the test hole is in close contact with the area to be measured. At the same time, a through alignment observation groove 22 is provided on the side of the support structure 20, which allows the operator to observe the alignment status of the measuring hole 1231 and the area to be measured from the side. This effectively solves the problem of obstruction of vision caused by the expansion of the bottom area, and significantly improves the measurement efficiency and measurement accuracy. The structure is simple, requires no additional parts, and has high reliability.

[0038] Please refer to some embodiments of this application. Figure 3 and Figure 5 The support structure 20 includes at least two support legs 21, which are arranged at intervals around the measuring hole 1231, and the gap between two adjacent support legs 21 forms the alignment observation groove 22.

[0039] When the number of support feet 21 is set to two, the two support feet 21 can be arranged symmetrically. When the number of support feet 21 is set to three, they can be arranged in a triangle with an included angle of 120°, forming a stable support around the central axis of the measuring hole 1231. The number of support feet 21 can also be set to three or more, which can be evenly distributed around the measuring hole 1231 to ensure that the instrument remains stable when placed on the surface being measured, avoiding tilting or shaking due to uneven force, thereby ensuring the perpendicularity of the optical path and the consistency of the measurement distance during the measurement process.

[0040] The support foot 21 can be set as a columnar support foot 21. When two support feet 21 are set, both of which are columnar support feet 21, the contact area of ​​the support feet 21 can be increased to maintain placement stability. In addition, when using columnar support feet 21, three columnar support feet 21 can also be set directly to maintain placement stability. The support foot 21 can also be set as a plate-shaped support foot 21 or an arc-shaped support foot 21. Multiple arc-shaped support feet 21 are combined to form an almost annular shape but with gaps. The gaps between the arc segments form an alignment observation groove 22, which can balance structural strength and visual transparency.

[0041] The support foot 21 can be installed to the bottom of the main body 10 by means of screws, clips, etc.; or the support foot 21 can be connected to an intermediate structural component, and then the structural component is fixed to the main body 10; it is only necessary to ensure that the bottom end of the support foot 21 and the bottom end of the measuring hole 1231 are on the same plane to achieve coplanar contact.

[0042] A through gap is naturally formed between two adjacent support legs 21, which constitutes the alignment observation groove 22. Since at least two support legs 21 are arranged at intervals, at least two alignment observation grooves 22 can be formed, located in two opposite directions. When measuring color difference, the operator can observe the relative position between the measuring hole 1231 and the object being measured from different directions through the gap, thus improving the ease of operation.

[0043] The gap between the support feet 21 serves as the alignment observation slot 22, eliminating the need for additional openings or transparent components. This design is simple, low-cost, and highly reliable. The support feet 21 can be made of metal (such as stainless steel or aluminum alloy) or engineering plastics, maintaining sufficient structural strength to achieve stable support.

[0044] Please refer to some embodiments of this application. Figure 3 and Figure 5 The supporting leg 21 is an arc-shaped plate structure.

[0045] When set with two support feet 21, the support feet 21 can be in the form of a semi-circular plate structure, which can stably support the main body 10.

[0046] Each support foot 21 is shaped as a plate-like arc structure that bends along the circumference. Multiple arc-shaped plate-like support feet 21 are arranged in a ring around the measuring hole 1231, which together form an approximately ring-shaped support structure 20.

[0047] The arc-shaped plate structure has good mechanical properties. Its arc-shaped contour can evenly distribute the pressure on the instrument along the tangential and radial directions, effectively improving the load-bearing capacity of the structure, avoiding stress concentration, and enhancing the stability of the support.

[0048] Multiple arc-shaped support feet 21 can be combined to form a ring-shaped support surface. While maintaining high stability, the gaps between each support foot 21 naturally form a through alignment observation groove 22, which not only achieves stable contact between the colorimeter 100 and the measured area, but also retains a lateral visual channel, making it convenient for the operator to observe the alignment status of the measuring hole 1231 and the measured area from multiple directions, thus improving measurement accuracy and ease of operation.

[0049] The arc-shaped plate structure can be made by stamping, injection molding or one-piece molding process. The processing technology is mature and the cost is low. The arc length, thickness and curvature can be flexibly adjusted to adapt to the design of measuring holes 1231 and main body 10 of different sizes.

[0050] Please refer to some embodiments of this application. Figure 3 The main body 10 includes a housing 11 and a base 12. The base 12 is installed on the bottom of the housing 11. A measuring hole 1231 is provided in the central area of ​​the bottom of the base 12. The support structure 20 is connected to the outer area of ​​the base 12, and the bottom end of the support structure 20 and the bottom end of the base 12 are located on the same plane.

[0051] The base 12 can be connected to the housing 11 by means of threads, snaps, screws, or interference fits to achieve reliable assembly. The interior of the housing 11 is used to install circuit boards, batteries, and optical components. A measurement hole 1231 is provided in the center area of ​​the bottom of the base 12. This measurement hole 1231 is aligned with the optical path of the optical components to allow measurement light to pass through.

[0052] The support structure 20 is connected to the outer periphery of the base 12, and thus can be arranged around the measuring hole 1231. The bottom end of the support structure 20 and the bottom end of the base 12 are located on the same plane, that is, the contact surface of the support structure 20 is flush with the lower end surface of the base 12, forming a coplanar support structure 20. This ensures that the support surface is consistent with the measurement reference surface when the instrument is placed, avoiding inconsistent measurement distances due to height differences, thereby improving the repeatability and accuracy of the measurement. In some embodiments, at least three support feet 21 are spaced apart around the measuring hole 1231 in the outer periphery of the base 12.

[0053] By setting the base 12, the functions of the measuring hole 1231 and the support structure 20 can be integrated into one module, which is conducive to the modular design of the product and facilitates production and assembly. As an intermediate connecting structure, the base 12 can also effectively protect the internal structure of the housing 11 and prevent external contaminants from directly entering the housing 11 during the measurement process.

[0054] In addition, the relative position of the measuring hole 1231 and the support structure 20 can be machined on the base 12 in one go, ensuring geometric accuracy and improving product consistency.

[0055] The base 12 can mate with the housing 11, and a mounting cavity or mounting slot is provided inside the base 12 for mounting optical components such as light sources and sensors. The inner surface of the base 12 can be machined into a spherical curved surface and coated with a high-reflectivity material to form an integrating sphere cavity with the housing 11. In a 45° annular illumination / 0° receiving structure, the base 12 can be provided with an annular light guide channel or a reflector assembly mounting position to guide light to illuminate the sample at a specific angle and guide the reflected light to the central sensor. This achieves the integration of the front end of the optical system, concentrating key optical path structures (such as the measurement aperture 1231, the reflective cavity, and the component mounting position) in the base 12, improving assembly accuracy and product consistency.

[0056] Please refer to some embodiments of this application. Figure 5 and Figure 6 The base 12 includes a connecting part 121, a mounting part 122, and a measuring part 123 connected in sequence. The connecting part 121 is connected to the housing 11. The mounting part 122 is provided with a receiving space 1221. The measuring part 123 is connected to the central area of ​​the mounting part 122. The measuring part 123 has a measuring hole 1231 communicating with the receiving space 1221. The support structure 20 is connected to the outer area of ​​the mounting part 122. The bottom end of the support structure 20 and the bottom end of the measuring part 123 are located on the same plane.

[0057] The connecting part 121 is located at the upper end of the base 12 and is used to achieve a detachable or fixed connection with the housing 11, such as by thread engagement, snap locking or screw engagement, to ensure a firm connection between the connecting part 121 and the housing 11.

[0058] The mounting portion 122 is located below the connecting portion 121 and has a receiving space 1221. This space can be used to install optical components and can also serve as part of the reflected light collection cavity. For example, in the integrating sphere colorimeter 100, the inner wall of the receiving space 1221 can be coated with a high-reflectivity coating to form the lower half of the integrating sphere cavity, which, together with the interior of the housing 11, constitutes a complete optical integrating cavity for efficiently collecting diffuse light reflected from the sample.

[0059] The measuring part 123 is located in the central area below the mounting part 122, protruding away from the housing 11. A measuring hole 1231 is formed at its bottom, communicating with the receiving space 1221, allowing light to be emitted from the optical path system through the measuring hole 1231 and received as reflected light. The connecting part 121, mounting part 122, and measuring part 123 (i.e., the entire base 12) can be designed as a single injection-molded unit to ensure geometric accuracy and improve product consistency.

[0060] The support structure 20 is connected to the outer periphery below the mounting part 122 and is arranged around the measuring part 123. Its bottom end is on the same plane as the bottom end of the measuring part 123, forming a coplanar support structure 20.

[0061] By setting up a receiving space 1221 in the base 12, the optical component mounting position and the reflective light cavity are integrated into one design, so that the base 12 not only undertakes the mechanical connection function, but also becomes an important part of the optical system, thereby improving the functional density and integration of the instrument.

[0062] The measuring section 123 is located in the center and has a small outer diameter, covering only the necessary measurement area and avoiding obstruction of surrounding samples; while the support structure 20 is located on the periphery, providing sufficient support area. Due to the small contact area of ​​the measuring section 123, in conjunction with the alignment observation groove 22 on the support structure 20, the operator can clearly see the relative position between the measuring hole 1231 and the sample mark, achieving rapid and accurate alignment and improving measurement efficiency.

[0063] Please refer to some embodiments of this application. Figure 6 The cross-sectional area of ​​the mounting part 122 gradually decreases from the end near the housing 11 to the direction away from the housing 11. The measuring part 123 is connected to the lower end face of the mounting part 122 and extends in the direction away from the housing 11. The support structure 20 is connected to the side of the mounting part 122 and is located around the measuring part 123.

[0064] The mounting part 122 has a tapered structure that is larger at the top and smaller at the bottom. Its bottom is connected to the measuring part 123 through the lower end face and extends away from the housing 11, forming a continuous and smooth geometric transition. This avoids stress concentration caused by structural abrupt changes, improves the mechanical strength and fatigue resistance of the connecting part 121, and facilitates demolding during injection molding or machining, thereby improving manufacturability and product consistency.

[0065] Meanwhile, this design facilitates the construction of an integrating sphere optical cavity inside the mounting section 122, whose inner wall can be designed as a highly reflective surface that approximates a sphere; or it can be adapted to optical system structures such as 45° surround illumination, whose conical inner wall can be provided with annular light guide grooves, etc.

[0066] The measuring part 123 is located on the lower end face of the mounting part 122 and extends downward. The support structure 20 is connected to the side of the mounting part 122 and is located on the radial periphery of the measuring part 123, forming a surrounding support. This achieves a smaller contact area and a larger support area, which improves the stability of the instrument placement while ensuring measurement accuracy.

[0067] The outer wall of the mounting section 122 is a downward-sloping surface, which makes it less likely to accumulate dust and other pollutants. Droplets of pollutants can slide off naturally along the slope. The overall structure is simple and easy to wipe and maintain.

[0068] Please refer to some embodiments of this application. Figure 6 The cross-sectional area of ​​the measuring section 123 gradually decreases from the end closest to the housing 11 toward the direction away from the housing 11.

[0069] As the front-end structure closest to the sample, the measuring unit 123 has a small end (the end away from the housing 11), which can significantly reduce the contact or proximity area with the sample surface, avoid large-sized structures from obstructing the operator's view, and facilitate observation of the alignment status between the measuring hole 1231 and the target area. It is suitable for measurement scenarios with small area and high-precision positioning.

[0070] Meanwhile, the smooth transition with a narrower front end prevents sharp edges from directly contacting the sample, effectively preventing scratches on high-gloss paint surfaces, soft plastics, and other fragile materials when placing or moving the instrument, thus protecting the sample's integrity. Furthermore, the thicker root of the measuring section 123 provides sufficient support strength, while the thinner front end enables precise positioning, resulting in excellent overall bending resistance and structural rigidity.

[0071] The outer surface of the measuring part 123 can be set as an arc surface or a conical surface, which makes it less likely to trap dirt and grime, and can be wiped clean quickly during cleaning.

[0072] Please refer to some embodiments of this application. Figures 1 to 4 The colorimeter 100 also includes a calibration cover 30, which is detachably connected to the base 12. A calibration white plate 31 is provided on the side of the calibration cover 30 facing the base 12, and the calibration white plate 31 is correspondingly set with the measuring hole 1231.

[0073] The calibration cover 30 can be detachably connected to the base 12 by means of threaded engagement, snap-fit ​​connection, or rotary locking. In some embodiments, such as Figures 3 to 5 The calibration cover 30 is tightened by a screw fastener (not shown in the figure). The screw fastener structure forms a mechanical limit after being rotated into place. The operation is intuitive, the connection is stable, and it can effectively resist external impacts such as vibration and drops, preventing the calibration cover 30 from falling off accidentally.

[0074] A calibration white plate 31 is installed inside the calibration cover 30, serving as a reference surface for color measurement. When the calibration cover 30 is in place, the calibration white plate 31 inside faces the measurement hole 1231. The instrument can emit light to illuminate the white plate and receive the reflected light, thereby establishing the zero point and gain parameters of the optical system, completing the calibration, and ensuring the accuracy and consistency of subsequent measurement data.

[0075] The calibration cover 30 is placed on the base 12 to seal the measurement hole 1231, preventing dust, fingerprints and other contaminants from polluting the measurement area, and also preventing scratches that could damage the optical system.

[0076] The detachable design allows users to quickly install the calibration cap 30 for calibration when needed, and then remove it to measure samples. The entire process requires no additional tools, making it simple and efficient. The twist-lock or magnetic structure, in particular, allows for installation and removal in seconds.

[0077] In addition, the calibration cover 30 can be designed as different functional modules, such as a cover equipped with whiteboards of different reflectivities for multi-level calibration.

[0078] In some embodiments of this application, the main body 10 further includes an upper shell (not shown in the figure), a mounting base (not shown in the figure), and a test cover (not shown in the figure). The mounting base is mounted on the bottom of the upper shell and has a through hole for transmitting measurement light. The test cover is detachably connected to the upper shell or the mounting base. The test cover has a measurement hole 1231 in the central area and a support structure 20 is connected to the bottom of the test cover.

[0079] The structure of the upper housing can be referenced from that of housing 11. The structure of the mounting base can be referenced from that of base 12. The mounting base can be connected to the upper housing by means of threads, snaps, screws, or interference fits to achieve reliable assembly. The interior of the upper housing is used to install circuit boards, batteries, and optical components. The mounting base is provided with through holes to allow measurement light to pass through, so that the measurement light can be emitted from the measurement hole 1231 of the test cover.

[0080] As an intermediate connecting structure, the mounting base can also effectively protect the internal structure of the upper shell. The mounting base can be equipped with mounting cavities or mounting slots to install optical components such as light sources and sensors. The mounting base can cooperate with the upper shell to form an integrating sphere cavity, etc.

[0081] The test cover is detachably connected to the upper housing or mounting base via threads, snaps, or a rotating lock. By featuring a detachable test cover, test covers with different aperture sizes (1231) can be interchanged. Users can choose the appropriate test cover based on the size of the measured area and accuracy requirements, enabling multi-scale measurement. For example, a small aperture can be used for fine areas, while a large aperture can be used for large, uniform areas. This design significantly expands the application range of a single colorimeter 100. The test cover is a detachable component, allowing for direct removal for cleaning or replacement, facilitating maintenance.

[0082] The support structure 20 is directly connected to the bottom of the test cover and is located around the measuring hole 1231. Therefore, the support structure 20 is replaced every time the test cover is replaced. The support height, coplanarity, and other structural parameters under different hole diameter configurations are uniformly guaranteed by the test cover, avoiding assembly errors caused by the separation of the support structure 20 and the measuring hole 1231. This ensures that every measurement has the same contact reference and alignment conditions, and also facilitates the assembly between the test cover and the mounting base.

[0083] The mounting base only needs to have one through hole for light transmission, eliminating the need for integrated measurement holes 1231 and support structure 20. Its function is simplified to a transition platform connecting the upper shell and the test cover. Therefore, the mounting base can be fixed to the upper shell as a standard part for a long time.

[0084] Please refer to some embodiments of this application. Figure 8 and Figure 9 The colorimeter 100 also includes a transparent positioning plate 40, which includes a positioning part 41 and an extension part 42 connected to the positioning part 41. The positioning part 41 is provided with a positioning hole 411. The transparent positioning plate 40 is fitted onto the outer periphery of the measuring hole 1231 through the positioning hole 411. The extension part 42 passes through the alignment observation groove 22 and extends outward to the outside of the main body 10.

[0085] Normally, the measuring personnel can directly observe whether the test hole and the area to be measured are aligned through the gap window between the fixed feet. If more precise alignment is required, a positioning plate is used. When using the positioning plate, place it firmly against the object being measured. First, align the center of the circular hole on the positioning plate with the center of the area to be measured. Hold the positioning plate still with one hand, and with the other hand, lift the instrument and insert the measuring holes 1, 2, 3, and 1 into the circular hole on the positioning plate. Then, press the measurement button on the instrument's touchscreen to obtain the color value of the measured area.

[0086] In routine measurements, users can perform visual alignment using the alignment observation slot 22 for quick operation. However, when facing a small area or a high-precision measurement area, a transparent alignment plate can be used as an auxiliary tool. By aligning the positioning hole 411 of the transparent alignment plate with the area to be measured and accurately inserting the measuring hole 1231 of the colorimeter 100 into the hole, it can be ensured that the light spot completely covers the target area, effectively avoiding color measurement errors caused by human offset and significantly improving alignment accuracy.

[0087] The transparent alignment plate is made of transparent materials, such as PC (polycarbonate) or glass, and has good light transmittance and wear resistance. During use, the user can clearly see the relative positional relationship between the surface of the object being measured and the positioning hole 411.

[0088] The size of the positioning hole 411 on the positioning part 41 matches the outer periphery of the measuring hole 1231, forming a loose fit or a slight interference fit, ensuring that the instrument will not wobble or shift after insertion, realizing the step of positioning first and then measuring, and improving the accuracy of measurement.

[0089] The extension 42 extends out of the alignment observation slot 22 and extends to the outside of the main body 10, so that the user can still observe the position of the transparent alignment plate after the instrument is placed. It is also convenient to operate. The user can fix the position of the transparent alignment plate by pressing the extension 42, and then pick up the colorimeter 100 with the other hand, put the measuring hole 1231 into the positioning hole 411, and then click the measurement button on the instrument's touch screen to obtain the color value of the measured area, realizing two-handed operation.

[0090] The transparent alignment plate is a detachable, independent accessory that is only used when high-precision alignment is required. It can be stored away when not in use and does not affect regular rapid measurement operations.

[0091] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A color difference meter characterized by comprising: include: The main body is used to emit measuring light, and the bottom of the main body is provided with a measuring hole for the measuring light to be emitted; as well as, A support structure is arranged around the measuring hole and is installed on the main body. The bottom end of the support structure and the bottom end of the measuring hole are located on the same plane. The side of the support structure is provided with at least one through alignment observation groove for observing the alignment status between the measuring hole and the measured area.

2. The color difference meter as claimed in claim 1, wherein The support structure includes at least two support legs, which are arranged at intervals around the measuring hole, and the gap between two adjacent support legs forms the alignment observation groove.

3. The color difference meter as claimed in claim 2, wherein The support foot is an arc-shaped plate structure.

4. The color difference meter according to any one of claims 1 to 3, wherein The main body includes a housing and a base. The base is installed at the bottom of the housing. The measuring hole is provided in the central area of ​​the bottom of the base. The support structure is connected to the bottom of the base, and the bottom end of the support structure and the bottom end of the base are located on the same plane.

5. The color difference meter as claimed in claim 4, wherein The base includes a connecting part, a mounting part, and a measuring part connected in sequence. The connecting part is connected to the housing. The mounting part has a receiving space. The measuring part is connected to the central area of ​​the mounting part and has a measuring hole communicating with the receiving space. The support structure is connected to the peripheral area of ​​the mounting part, and the bottom end of the support structure and the bottom end of the measuring part are located on the same plane.

6. The color difference meter as claimed in claim 5, wherein The cross-sectional area of ​​the mounting part gradually decreases from the end near the housing to the direction away from the housing. The measuring part is connected to the lower end face of the mounting part and extends in the direction away from the housing. The supporting structure is connected to the side of the mounting part and is located around the measuring part.

7. The color difference meter as claimed in claim 5, wherein The cross-sectional area of ​​the measuring part gradually decreases from the end closest to the housing towards the direction away from the housing.

8. The color difference meter as claimed in claim 4, wherein The colorimeter also includes a calibration cover, which is detachably connected to the base. A calibration white plate is provided on the side of the calibration cover facing the base, and the calibration white plate is arranged corresponding to the measurement hole.

9. The color difference meter according to any one of claims 1 to 3, wherein The main body includes an upper shell, a mounting base, and a test cover. The mounting base is installed at the bottom of the upper shell and has a through hole for transmitting the measuring light. The test cover is detachably connected to the upper shell or the mounting base, and the measuring hole is provided in the central area of ​​the test cover. The support structure is connected to the bottom of the test cover.

10. The color difference meter according to any one of claims 1 to 3, wherein The colorimeter also includes a transparent positioning plate, which includes a positioning part and an extension part connected to the positioning part. The positioning part is provided with a positioning hole. The transparent positioning plate is fitted onto the outer periphery of the measuring hole through the positioning hole. The extension part passes through the alignment observation groove and extends outward to the outside of the main body.

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