An apparatus for measuring whiteness of tissue paper
By combining the extrusion mechanism and the leveling component, the gap problem caused by folding in the whiteness measurement of household paper was solved, achieving higher measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAODING DAYI PAPER IND CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing technology, the accuracy of whiteness measurement results for household paper is easily affected by gaps after folding.
A whiteness measuring instrument including a squeezing mechanism and a leveling component is used. One end of the paper is fixed by a squeezing plate and a connecting plate driven by a motor, while the other end of the paper is leveled by an electric telescopic rod. The connecting plate is kept horizontal and stable by a limit ball and a limit groove to ensure that the paper is flat and fixed.
This effectively avoids gaps caused by paper folding during measurement, thus improving the accuracy of whiteness measurement.
Smart Images
Figure CN224553061U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of whiteness measuring instruments, and more specifically, to a whiteness measuring instrument for household paper. Background Technology
[0002] A whiteness meter is an instrument used to measure the whiteness of an object's surface. It is widely used in many industries such as papermaking, textiles, printing and dyeing, plastics, ceramics, coatings, and food, as well as in scientific research. It can be applied to household paper to measure the whiteness of paper, control the bleaching process in paper production, and ensure that the whiteness of paper meets quality standards.
[0003] In the prior art, when using a benchtop whiteness meter to measure the whiteness of household paper, after calibrating the instrument, the household paper is placed on the sample holder, which is elastic and can be raised and lowered. When the sample holder rises, the top of the paper is brought into contact with the bottom of the measuring instrument, and then the measurement of the paper is started. Since most household paper is toilet paper or facial tissue, this type of paper is relatively thin. Before measurement, the paper may be folded before being placed on the sample holder. Although the rising of the sample holder and its cooperation with the measuring instrument can compress the folded paper, there may still be gaps between the pieces of household paper, which will affect the subsequent measurement results. Utility Model Content
[0004] To overcome the above-mentioned defects, embodiments of this disclosure provide a whiteness measuring instrument for household paper, which solves the technical problem that gaps may exist between household paper products in the prior art.
[0005] According to one aspect, at least one embodiment of this disclosure provides a whiteness tester for household paper, including a whiteness tester body, the whiteness tester body including a base, a sample holder being vertically and elliptically mounted on the base, a support frame being fixedly connected to the base, a measuring instrument being mounted at one end of the support frame, and further including a fixing plate, a fixing frame, a squeezing mechanism and a leveling assembly, the bottom end of the fixing plate being fixedly connected to the top end of the sample holder, the bottom end of the fixing frame being fixedly connected to the top end of the fixing plate, the squeezing mechanism being mounted on the fixing frame for squeezing downward and fixing one end of the paper, and the leveling assembly being mounted on the fixing plate for leveling and fixing the other end of the paper.
[0006] To secure the paper to the fixing plate and press one end of the paper firmly against the fixing plate, the pressing mechanism includes a first motor, a screw, a sliding plate, two pressing springs, and a pressing plate. The first motor is mounted on the top of the fixing frame. One end of the screw is rotatably connected to the fixing frame and coaxially connected to the output end of the first motor. The top end of the sliding plate is threadedly connected to the screw. Both ends of the sliding plate are slidably engaged with the inner sidewall of the fixing frame. One end of the pressing spring is fixedly connected to the inner top wall of the fixing frame, and the other ends of the two pressing springs are fixedly connected to the top end of the pressing plate.
[0007] In order to lay the paper flat on the upper surface of the fixing plate after one end of the paper is fixed, the leveling assembly includes two electric telescopic rods, a connecting plate and a snap-fit assembly. One end of the two electric telescopic rods is fixedly connected to one end of the pressing plate, and the other end of the two electric telescopic rods is fixedly connected to one end of the connecting plate. The snap-fit assembly is disposed at both ends of the connecting plate for horizontally fixing the connecting plate.
[0008] To ensure the connecting plate remains horizontally stable after the other end of the paper is fixed, the snap-fit assembly includes two snap-fit seats, a connecting spring, an extension plate, a limiting ball, and a limiting groove. One end of each of the two snap-fit seats is fixedly connected to both ends of the connecting plate. Each snap-fit seat has a through hole. One end of the connecting spring is fixedly connected to the inner bottom wall of the through hole. One end of the extension plate is fixedly connected to the other end of the connecting spring. One end of the limiting ball is fixedly connected to the other end of the extension plate. Both ends of the fixing plate have limiting grooves that cooperate with the limiting ball.
[0009] In order to guide the extrusion plate to move longitudinally, the fixing frame is provided with a moving groove that cooperates with the sliding plate.
[0010] To increase the friction between the extrusion plate and the paper and prevent the paper from moving during the paper leveling process, a rubber pad is provided at the bottom of the extrusion plate.
[0011] To prevent the two electric telescopic rods from being blocked and colliding with the measuring instrument during the sample holder's ascent, the distance between the two electric telescopic rods is greater than the diameter of the measuring instrument, and they are symmetrically arranged on both sides of the measuring instrument.
[0012] In order to make the limiting ball engage in the limiting groove, both ends of the limiting groove are spherical limiting half holes that cooperate with the limiting ball.
[0013] The beneficial effects of the embodiments disclosed herein are as follows:
[0014] In this disclosure, through the cooperation of the extrusion mechanism and the leveling assembly, the first motor drives the extrusion plate and the connecting plate to move downwards simultaneously. During the movement, the limit ball engages with the limit slide groove, keeping the connecting plate horizontal during movement. At this time, the first motor is turned off, and the two ends of the paper are fixed by the bottom ends of the extrusion plate and the connecting plate, respectively. The connecting plate is pushed away from the fixed frame by two electric telescopic rods to level the paper. This avoids gaps between the paper after folding, as the paper is held by the sample holder and the measuring instrument, thus improving the accuracy of the paper measurement. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present disclosure;
[0017] Figure 2 This is a schematic diagram of the structure of the fixing plate, fixing frame, pressing mechanism and leveling assembly in one embodiment of the present disclosure;
[0018] Figure 3 This is a partial cross-sectional view of the paper after the pressing plate and connecting plate have fixed the paper and the connecting plate has flattened the paper in one embodiment of this disclosure.
[0019] Figure 4 For one embodiment of this disclosure Figure 3 Enlarged view of the local structure at point A;
[0020] Figure 5 This is a schematic diagram of the structure of the whiteness meter body in one embodiment of this disclosure.
[0021] In the diagram: 1. Whiteness meter body; 2. Base; 3. Sample holder; 4. Support frame; 5. Measuring instrument; 6. Fixing plate; 7. Fixing frame; 8. First motor; 9. Screw; 10. Slide plate; 11. Compression spring; 12. Compression plate; 13. Electric telescopic rod; 14. Connecting plate; 15. Snap-fit seat; 16. Through hole; 17. Connecting spring; 18. Extension plate; 19. Limiting ball; 20. Limiting slide groove; 21. Moving groove; 22. Rubber pad; 23. Pressing ring; 24. Sponge pad. Detailed Implementation
[0022] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0023] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0024] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0025] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.
[0027] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] like Figures 1-5As shown, it illustrates a whiteness measuring instrument for household paper according to an embodiment of the present disclosure, including a whiteness measuring instrument body 1, a base 2, a sample holder 3 that is vertically adjustable on the base 2, a pressing ring 23 fitted on the sample holder 3, a support frame 4 fixedly connected to the base 2, a measuring instrument 5 provided at one end of the support frame 4, the bottom end of the measuring instrument 5 is connected to the top end of the sample holder 3, by manually pressing down the pressing ring 23, the sample holder 3 is moved downward, a gap is created between the top end of the sample holder 3 and the bottom end of the measuring instrument 5, which can be used to place paper, by releasing the pressing ring 23, the sample holder 3 is moved upward and cooperates with the measuring instrument 5 to clamp and fix the paper, the whiteness of the paper is measured by the operation of the measuring instrument 5, characterized in that it also includes a fixing plate 6, a fixing frame 7, a squeezing mechanism and a leveling assembly, the bottom end of the fixing plate 6 is fixedly connected to the top end of the sample holder 3, and the bottom end of the fixing frame 7 is fixedly connected to the top end of the fixing plate 6.
[0029] like Figure 2 and Figure 3 As shown, the extrusion mechanism is mounted on the fixed frame 7 and is used to extrude and fix one end of the paper downwards. To fix the paper to the fixed plate 6 and press one end of the paper firmly onto the fixed plate 6, the extrusion mechanism includes a first motor 8, a screw 9, a sliding plate 10, two extrusion springs 11, and an extrusion plate 12. The first motor 8 is mounted on the top of the fixed frame 7. One end of the screw 9 is rotatably connected to the fixed frame 7 and coaxially connected to the output end of the first motor 8. The top of the sliding plate 10 is threadedly connected to the screw 9. Both ends of the sliding plate 10 are slidably engaged with the inner sidewall of the fixed frame 7. To guide the extrusion plate 12 and allow it to move longitudinally, the fixed frame 7 has a moving groove 21 that engages with the sliding plate 10. One end of the extrusion spring 11 is fixedly connected to the inner top wall of the fixed frame 7, and the other ends of the two extrusion springs 11 are... One end is fixedly connected to the top of the extrusion plate 12. In order to increase the friction between the extrusion plate 12 and the paper and prevent the paper from moving during the paper leveling process, a rubber pad 22 is provided at the bottom of the extrusion plate 12. The top of the extrusion plate 12 is in contact with the bottom of the screw 9. By driving the sample holder 3 to move downward, a gap is created between the fixed plate 6 and the bottom of the measuring instrument 5. The paper is placed on the fixed plate 6 with one end of the paper below the extrusion plate 12. By starting the first motor 8, the output end of the first motor 8 rotates and drives the screw 9 to rotate. The screw 9 drives the slide plate 10 to move downward. The slide plate 10 drives the two extrusion springs 11 and the extrusion plate 12 to move downward. The rubber pad 22 contacts the paper and, during the subsequent movement, the two extrusion springs 11 contract, and one end of the paper is squeezed and fixed on the fixed plate 6.
[0030] like Figure 2 , Figure 3 and Figure 4As shown, the leveling assembly is mounted on the fixed plate 6 to level and fix the other end of the paper. To ensure the paper is laid flat on the upper surface of the fixed plate 6 after one end is fixed, the leveling assembly includes two electric telescopic rods 13, a connecting plate 14, and a locking assembly. One end of each electric telescopic rod 13 is fixedly connected to one end of the pressing plate 12, and the other end of each electric telescopic rod 13 is fixedly connected to one end of the connecting plate 14. A sponge pad 24 is provided at the bottom of the connecting plate 14. The bottom of the sponge pad 24 is made of a smooth material and slides smoothly with the paper. Both electric telescopic rods 13 are made of high-rigidity, high-hardness material to avoid... During the ascent of the sample holder 3, the two electric telescopic rods 13 are obstructed and collide with the measuring instrument 5. The distance between the two electric telescopic rods 13 is greater than the diameter of the measuring instrument 5, and they are symmetrically arranged on both sides of the measuring instrument 5. The snap-fit assembly is located at both ends of the connecting plate 14 for horizontally fixing the connecting plate 14. In order to keep the connecting plate 14 stable in the horizontal direction after the other end of the paper is fixed, the snap-fit assembly includes two snap-fit seats 15, a connecting spring 17, an extension plate 18, a limiting ball 19, and a limiting slide groove 20. One end of each of the two snap-fit seats 15 is fixedly connected to both ends of the connecting plate 14, and a through hole 16 is provided on the snap-fit seat 15. One end of the connecting spring 17 is fixedly connected to the inner bottom wall of the through hole 16, one end of the extension plate 18 is fixedly connected to the other end of the connecting spring 17, and one end of the limiting ball 19 is fixedly connected to the other end of the extension plate 18. Both ends of the fixing plate 6 are provided with limiting grooves 20 that cooperate with the limiting ball 19. To allow the limiting ball 19 to engage within the limiting groove 20, both ends of the limiting groove 20 are spherical limiting half-holes that cooperate with the limiting ball 19. Driven by the first motor 8, the sliding plate 10 moves downwards, simultaneously driving the leveling assembly downwards. During this movement, the edge of the fixing plate 6 presses against the limiting ball 19, causing the limiting ball 19 to enter the through hole 16. Inside the hole 16, the limiting ball 19 drives the extension plate 18 to move. The extension plate 18 presses the connecting spring 17, and the connecting spring 17 retracts. When the limiting ball 19 is fully inside the through hole 16, the snap-fit seat 15 moves downward against the outer wall of the fixing plate 6. When the limiting ball 19 moves to the limiting slide groove 20, the connecting spring 17 pushes the extension plate 18 to move the limiting ball 19 out of the through hole 16 and snaps it into the limiting slide groove 20. At this time, the first motor 8 is turned off, so that both ends of the paper are fixed by the bottom ends of the pressing plate 12 and the connecting plate 14 respectively. The connecting plate 14 is pushed away from the fixing frame 7 by the two electric telescopic rods 13 to flatten the paper.
[0031] Working Principle: Place the whiteness tester for household paper in a suitable position and start the whiteness tester body 1. After calibration, the user manually presses down on the pressing ring 23 to move the sample holder 3 downwards, creating a gap between the fixed plate 6 and the bottom of the measuring instrument 5. Place the paper on the fixed plate 6 with one end of the paper below the pressure plate 12. Start the first motor 8. The output of the first motor 8 rotates, driving the screw 9 to rotate. The screw 9 simultaneously moves the slide plate 10 and the two electric telescopic rods 13 downwards. The slide plate 10 moves the two compression springs 11 and the pressure plate 12 downwards. The rubber pad 22 contacts the paper, and during subsequent movement, the two compression springs 11 contract, compressing one end of the paper and fixing it to the fixed plate 6. The electric telescopic rods 13 move the connecting plate 14 downwards. During the movement, the fixed plate 6... The edge-pressed limiting ball 19 enters the through hole 16. The limiting ball 19 drives the extension plate 18 to move. The extension plate 18 presses the connecting spring 17, and the connecting spring 17 retracts. When the limiting ball 19 is fully inside the through hole 16, the locking seat 15 moves downward against the outer wall of the fixing plate 6. When the limiting ball 19 moves to the limiting groove 20, the connecting spring 17 pushes the extension plate 18 to move the limiting ball 19 out of the through hole 16 and lock it into the limiting groove 20. At this time, the first motor 8 is turned off, so that both ends of the paper are fixed by the bottom ends of the pressing plate 12 and the connecting plate 14 respectively. The connecting plate 14 is pushed away from the fixing frame 7 by the two electric telescopic rods 13 to flatten the paper. Then the pressing ring 23 is released, and the sample holder 3 rises elastically and drives the paper fixed on the fixing plate 6 to stick to the bottom of the measuring instrument 5 to measure the whiteness of the paper.
[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A whiteness tester for household paper, comprising a whiteness tester body (1), the whiteness tester body (1) comprising a base (2), a sample holder (3) being vertically and flexibly mounted on the base (2), a support frame (4) being fixedly connected to the base (2), and a measuring instrument (5) being mounted at one end of the support frame (4), characterized in that, Also includes: A fixing plate (6) is fixedly connected at its bottom end to the top end of the sample holder (3). A fixing frame (7) is fixedly connected at its bottom end to the top end of the fixing plate (6); A squeezing mechanism is provided on the fixed frame (7) for squeezing down and fixing one end of the paper; A leveling component is disposed on the fixing plate (6) for leveling and fixing the other end of the paper.
2. The whiteness measuring instrument for household paper according to claim 1, characterized in that, The extrusion mechanism includes: The first motor (8) is mounted on the top of the fixed frame (7); Screw (9), one end of which is rotatably connected to the fixed frame (7) and coaxially connected to the output end of the first motor (8); The top of the slide plate (10) is threadedly connected to the screw (9), and the two ends of the slide plate (10) are respectively slidably engaged with the inner sidewall of the fixing frame (7); Two compression springs (11), one end of which is fixedly connected to the inner top wall of the fixing frame (7); The other ends of the two compression springs (11) are fixedly connected to the top of the compression plate (12).
3. The whiteness measuring instrument for household paper according to claim 2, characterized in that, The leveling component includes: Two electric telescopic rods (13), one end of the two electric telescopic rods (13) being fixedly connected to one end of the extrusion plate (12); The connecting plate (14) has the other ends of the two electric telescopic rods (13) fixedly connected to one end of the connecting plate (14); A snap-fit assembly is disposed at both ends of the connecting plate (14) for horizontally fixing the connecting plate (14).
4. The whiteness measuring instrument for household paper according to claim 3, characterized in that, The snap-fit assembly includes: Two snap-fit seats (15) are provided, one end of each snap-fit seat (15) is fixedly connected to both ends of the connecting plate (14), and through holes (16) are provided on the snap-fit seats (15). A connecting spring (17) is fixedly connected at one end to the inner bottom wall of the through hole (16); An extension plate (18) is provided, one end of which is fixedly connected to the other end of the connecting spring (17). A limiting ball (19), one end of which is fixedly connected to the other end of the extension plate (18); Limiting groove (20): Both ends of the fixing plate (6) are provided with limiting grooves (20) that cooperate with the limiting ball (19).
5. The whiteness measuring instrument for household paper according to claim 2, characterized in that, The fixed frame (7) is provided with a movable groove (21) that cooperates with the sliding plate (10).
6. The whiteness measuring instrument for household paper according to claim 2, characterized in that, A rubber pad (22) is provided at the bottom end of the extrusion plate (12).
7. The whiteness measuring instrument for household paper according to claim 3, characterized in that, The distance between the two electric telescopic rods (13) is greater than the diameter of the measuring instrument (5), and they are symmetrically arranged on both sides of the measuring instrument (5).
8. The whiteness measuring instrument for household paper according to claim 4, characterized in that, The two ends of the limiting groove (20) are spherical limiting half holes that cooperate with the limiting ball (19).