Anti-forgery pen ball, pen point, pen, method for manufacturing anti-forgery pen ball, and handwriting identification method

Abstract

The present disclosure provides a forgery-proof pen ball, a pen point, a pen, a manufacturing method of the forgery-proof pen ball, and a handwriting identification method. The forgery-proof pen ball has ink affinity, wherein one or more feature patterns are formed on the forgery-proof pen ball; the feature pattern has an outline formed by a predetermined geometric shape; and a groove is formed around the feature pattern, which surrounds the outer outline of the feature pattern, wherein one or more recessed structures are formed towards the center of the ball on the forgery-proof pen ball, the recessed structures are used to form the predetermined geometric shape on the surface of the forgery-proof pen ball, and a material with ink repellency is arranged in the recessed structure to make the feature pattern corresponding pen ball area have ink repellency. By using the technical solution of the present disclosure, microscopic token features can be added to the handwriting, so that handwriting identification can no longer rely solely on writing style for judgment, and therefore the accuracy of handwriting identification can be improved.

Description

Technical Field

[0001] This disclosure relates to an anti-counterfeiting pen bead that can form microscopic token features in handwriting lines, a pen tip and pen using the anti-counterfeiting pen bead, a method for manufacturing the anti-counterfeiting pen bead, and a handwriting identification method. Background Technology

[0002] Handwriting identification can use handwritten text information to determine the writer's identity and has received much attention in recent years as a research hotspot in the fields of machine vision and pattern recognition. Due to the deep foundation of signature authentication mechanisms in the judicial system, handwriting identification has high interpretability and legal acceptance, and is widely used in government, judicial, and commercial transactions.

[0003] Traditional handwriting identification research is usually based on macroscopic writing features and mainly includes two tasks: Task 1 is handwriting recognition, which compares the handwriting to be tested with documents of known writers in the database to determine the writer's identity; Task 2 is handwriting retrieval, which retrieves the closest handwriting record by measuring the similarity between the local or overall features of the handwriting to be queried and the samples in the handwriting database.

[0004] In handwriting identification, common feature extraction strategies include: global feature extraction, which directly describes the entire handwriting, extracting overall shape and statistical information as identification criteria; and local feature extraction, which divides the handwriting image into several small blocks, extracting local information such as stroke gradients, contour lines, and geometric structures, and then encoding and aggregating them into a global description. Identification methods based on local features can obtain richer local information under small sample conditions, and therefore have received more attention in recent years.

[0005] However, these handwriting identification methods also face challenges.

[0006] For example, segmenting handwriting into blocks during data preprocessing is often inaccurate, leading to the incorrect segmentation of continuous strokes and the loss of overall information. Simultaneously, the extracted local features have limited expressive power, making them ill-suited to the complexity of real-world handwriting identification tasks. Furthermore, the handwriting style of the same person may change at different times or in different situations. When different people have similar handwriting styles, or in professional forgery scenarios, the handwriting of different people shows high similarity, all of which can significantly reduce the accuracy of existing handwriting identification methods. In addition, factors such as ink contamination and scanning noise that can easily occur during data acquisition can degrade the quality of the data, weakening the model's discriminative ability. Summary of the Invention

[0007] In view of the above-mentioned problems existing in the prior art, one purpose of this disclosure is to provide a writing tool with anti-counterfeiting function, and another purpose is to provide a handwriting identification method to improve the accuracy of handwriting identification.

[0008] In one aspect of this disclosure, an anti-counterfeiting pen ball is provided, which is ink-repellent, wherein one or more feature patterns are formed on the anti-counterfeiting pen ball; the feature patterns have an outline formed by a predetermined geometry; and a groove is formed around the feature patterns, the groove surrounding the outer outline of the feature patterns, wherein one or more recessed structures are formed on the anti-counterfeiting pen ball toward the center of the ball, the recessed structures being used to form the predetermined geometry on the surface of the anti-counterfeiting pen ball, and an ink-repellent material is disposed in the recessed structures to make the pen ball area corresponding to the feature patterns ink-repellent.

[0009] Because the area of ​​the pen bead corresponding to the feature pattern has ink-repellent properties, the handwriting produced using this anti-counterfeiting pen bead will leave a hollow pattern corresponding to the feature pattern. This hollow pattern can be used as a microscopic token feature for handwriting identification and is directly associated with the pen that uses the anti-counterfeiting pen bead. Therefore, by identifying the hollow pattern in the handwriting line, it can be confirmed whether the handwriting was written by a predetermined pen, thereby achieving the purpose of anti-counterfeiting and significantly improving the accuracy of handwriting identification.

[0010] Furthermore, grooves are formed around the outer contour of the feature pattern on the surface of the anti-counterfeiting pen ball. These grooves are ink-receptive, causing ink adhering near the feature pattern to enter the grooves instead of adhering to the feature pattern. This results in clearer edges for the hollow pattern formed in the pen strokes, making it easier to identify. Moreover, compared to other areas on the ball's surface, the grooves can hold more ink, attracting ink from near the hollow pattern into the grooves, which helps to make the edges of the hollow pattern more prominent and easier to identify.

[0011] The recessed structure facing the center of the sphere can be easily formed using methods such as laser etching or chemical etching. Especially in the case of laser etching, it is possible to flexibly achieve predetermined geometries of different shapes, quantities, and / or configurations. In addition, the ink-repellent material set in the recessed structure can be well retained by the recessed structure and is not easy to fall off, thus maintaining good anti-counterfeiting properties over a long period of time.

[0012] According to an embodiment of the present disclosure, a gap is formed between the groove and the outer contour of the feature pattern, such that the groove and the outer contour of the feature pattern do not contact each other.

[0013] If the groove contacts the outer contour of the feature pattern, the ink entering the groove will easily penetrate into the feature pattern when it spreads on the paper, making the edges of the hollow pattern unclear. When the groove does not contact the outer contour of the feature pattern, the ink near the edge of the feature pattern will easily enter the groove and will not easily adhere to the feature pattern. Furthermore, the ink will not easily penetrate into the feature pattern when it spreads on the paper, thereby improving the clarity of the hollow pattern in the writing.

[0014] According to embodiments of this disclosure, each of the feature patterns includes at least one of the predetermined geometric shapes, and the maximum size of each predetermined geometric shape is smaller than the diameter of the anti-counterfeiting pen ball. Furthermore, the feature pattern includes multiple predetermined geometric shapes, and any two adjacent predetermined geometric shapes are in an intersecting, tangent, or disjoint positional relationship.

[0015] When the above-mentioned dimensional relationships are met, it is easy to form a complete feature pattern in the handwriting, which is beneficial for subsequent identification and comparison. When the feature pattern is formed by multiple predetermined geometric shapes in different positional relationships, the expression of the feature pattern can be further enriched, and the counterfeiting difficulty of the anti-counterfeiting pen ball can be further increased.

[0016] In another aspect of this disclosure, an anti-counterfeiting pen bead is provided, which is ink-repellent, wherein one or more recessed structures are formed on the anti-counterfeiting pen bead toward the center of the bead; the recessed structures are used to form a predetermined geometry on the surface of the anti-counterfeiting pen bead; and the recessed structures are filled with an ink-repellent material or a surface coating made of an ink-repellent material is formed, such that the predetermined geometry is formed as an ink-repellent feature pattern.

[0017] In another aspect of this disclosure, a pen tip is provided, which includes any of the aforementioned anti-counterfeiting pen balls.

[0018] In another aspect of this disclosure, a pen is provided that includes the aforementioned pen tip.

[0019] In another aspect of this disclosure, a method for manufacturing an anti-counterfeiting pen bead is provided, the method comprising: forming one or more recessed structures on the bead toward the center of the bead, the recessed structures being used to form a predetermined geometry on the surface of the bead; and filling the recessed structures with an ink-repellent material or forming a surface coating on the inner surface of the recessed structures using an ink-repellent material, such that the predetermined geometry is formed as an ink-repellent feature pattern.

[0020] According to embodiments of this disclosure, the recessed structure is formed on the bead by laser etching or chemical etching.

[0021] According to an embodiment of this disclosure, after the feature pattern is formed, a groove surrounding the outer contour of the feature pattern is formed on the surface of the bead by laser etching.

[0022] According to embodiments of this disclosure, the groove is formed such that it does not contact the outer contour of the feature pattern, and the method further includes cleaning the ink-receptive beads before forming the recessed structure.

[0023] In another aspect of this disclosure, a handwriting identification method is provided, the method comprising: selecting a sample area from the handwriting to be identified; acquiring a magnified image of the sample area; observing in the magnified image whether a predetermined feature pattern formed by hollow patterns exists in the handwriting; and determining whether the handwriting to be identified was written with a predetermined pen based on whether the predetermined feature pattern exists in the handwriting.

[0024] According to any aspect of this disclosure, microscopic token features can be added to handwriting, so that handwriting identification no longer relies solely on writing style, thus improving the accuracy of handwriting identification. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the anti-counterfeiting pen ball of the first embodiment.

[0026] Figure 2 This is a schematic cross-sectional view of the anti-counterfeiting pen ball according to the first embodiment.

[0027] Figure 3 This is a schematic diagram illustrating the pattern formed in handwriting using a security pen ball.

[0028] Figure 4 This is an example of a characteristic pattern on an anti-counterfeiting pen ball.

[0029] Figure 5 This is an example of a characteristic pattern on an anti-counterfeiting pen ball.

[0030] Figure 6 This is an example of a characteristic pattern on an anti-counterfeiting pen ball.

[0031] Figure 7 The image shows photographs taken under a microscope of the hollow patterns formed in the handwriting by different anti-counterfeiting pen beads.

[0032] Figure 8 The image shows photographs taken under a microscope of the hollow patterns formed in the handwriting by different anti-counterfeiting pen beads.

[0033] Figure 9 The image shows photographs taken under a microscope of the hollow patterns formed in the handwriting by different anti-counterfeiting pen beads.

[0034] Figure 10 The image shows photographs taken under a microscope of the hollow patterns formed in the handwriting by different anti-counterfeiting pen beads.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Pen; 2. Paper; 10. Ball; 11. Feature pattern; 12. Pattern edge; 13. Groove; 20. Hollow pattern; 100. Structural hole. Detailed Implementation

[0037] Pens with tiny ballpoint tips are widely used writing instruments, commonly known as felt-tip pens, ballpoint pens, or rollerball pens. During writing, the ballpoint tip rolls continuously against the paper, transferring the ink onto the paper. Commonly used inks can be categorized as water-based, neutral, and oil-based. Because water-based inks spread more easily on paper, neutral and oil-based inks are more likely to produce sharp, defined lines.

[0038] The following description, for ease of illustrating the technical solution of this disclosure, uses an oil-based ink ballpoint pen as an example to illustrate specific implementation methods. However, this disclosure is not limited thereto, and those skilled in the art should understand that the technical concept of this disclosure can also be applied to pens that use water-based ink and neutral ink and write with the aid of a ballpoint ball.

[0039] In the accompanying drawings, the structures, shapes, and positional relationships shown are all schematic and intended to illustrate the technical concept of this disclosure, rather than to limit the disclosure in any way. Those skilled in the art should understand that the situations shown in the drawings are not necessarily drawn to scale according to the actual situation, and there may be enlargements, reductions, or omissions of certain structures or areas.

[0040] In the following description, the term "predetermined geometry" means that the geometry is predetermined for anti-counterfeiting purposes, and the actual geometry formed conforms to expectations. For example, "predetermined geometry of a circle" means that a circle is intended to represent the geometry with anti-counterfeiting features. In this case, if the final geometry is not a circle (e.g., it is a sector, a square, etc.), then the actual geometry cannot be called "predetermined geometry of a circle".

[0041] In the following description, "ink-repellent" means the property of writing ink to adhere easily. For example, when using oil-based ink, "ink-repellent material" means that oil-based ink adheres easily to the material; when using neutral ink, "ink-repellent material" means that neutral ink adheres easily to the material; and when using water-based ink, "ink-repellent material" means that water-based ink adheres easily to the material.

[0042] [First Implementation Method]

[0043] The first implementation method is an anti-counterfeiting pen ball. Figure 1 and Figure 2 The ball bearing 10, which can be used as the ball of this anti-counterfeiting pen, is shown. The ball bearing 10 can be applied to... Figure 3 The ballpoint pen 1 shown is an example of a ballpoint pen that uses oil-based ink, and the diameter of the ballpoint tip is, for example, 1.0 mm. However, it is not limited to this; the diameter of the ballpoint tip can also be 1.5 mm, 0.7 mm, 0.5 mm, or other values.

[0044] The ball bead 10 is ink-repellent. Specifically, the ball bead 10 may be made of an ink-repellent material, or the material of the ball bead 10 may undergo an ink-repellent treatment, or an ink-repellent layer may be formed on the ball bead 10. A feature pattern 11 is formed on the ball bead 10, the feature pattern 11 having an outline formed by a predetermined geometry. A groove 13 is formed around the feature pattern 11, the groove 13 surrounding the outer outline of the feature pattern 11. A pattern edge portion 12 is formed between the groove 13 and the outer outline of the feature pattern 11, such that the groove 13 does not contact the outer outline of the feature pattern 11. The pattern edge portion 12 is an example of the gap formed between the groove 13 and the feature pattern 11.

[0045] like Figure 2 As shown, the feature pattern 11 is formed using a structural hole 100. The structural hole 100 is an example of a recessed structure facing the center of the bead 10. A pigment-repellent material is provided in the structural hole 100 to make the formed feature pattern 11 pigment-repellent, thereby making the area on the bead 10 corresponding to the feature pattern 11 pigment-repellent. The pigment-repellent material can be filled into the structural hole 100 or attached to the inner surface of the structural hole 100 to form a pigment-repellent surface coating. The dimensions of the structural hole 100 and the groove 13 can be flexibly selected according to the situation; for example, the diameter of the structural hole 100 is 140 μm and the depth is 350 μm, and the maximum width of the groove 13 is 28 μm and the depth is 100 μm.

[0046] Figure 1 The diagram illustrates a case where the predetermined geometry is circular; therefore, the outer contour of the feature pattern 11, the pattern edge 12, and the groove 13 are all circular. The pattern edge 12 is formed from the surface of the bead 10, and the groove 13 is formed by removing a portion of material from the bead 10; therefore, both the pattern edge 12 and the groove 13 are ink-receptive. A cavity is formed in the groove 13, thus allowing it to store more ink than other parts of the bead 10. During the rapid rotation of the bead 10, ink typically does not completely fill the groove 13, causing ink adhering to the pattern edge 12 to tend to enter the groove 13, thereby significantly reducing the amount of ink near the outer contour of the feature pattern 11.

[0047] Figure 3 This illustrates the use of pen 1 to create a line of ink along the writing direction W on paper 2. For example... Figure 3 As shown in (a) and (b), during the rotation of the bead 10 along the rotation direction R, ink first adheres to the bead 10 and then transfers to the paper 2 to form a pen mark. When the ink adheres to the bead 10, there is no (or almost no) ink adhered to the feature pattern 11. Before the ink transfers to the paper 2, the ink adhering to the edge 12 of the pattern tends to transfer into the groove 13. After the ink transfers to the paper 2, a hollow pattern (i.e., a pattern with no or almost no ink) 20 corresponding to the feature pattern 11 is formed in the pen mark.

[0048] If the pen 1 with the ballpoint ball 10 is specific, that is, only one (or more) specific pens 1 have the ballpoint ball 10, then the lines written by this (or these) pens 1 will have the following characteristics: Figure 3 The hollow pattern 20 shown is absent in handwriting lines written with other pens. Therefore, the hollow pattern 20 in the handwriting lines can be used as an anti-counterfeiting measure (i.e., a microscopic token feature) when identifying handwriting.

[0049] The shape, quantity, and / or configuration of the predetermined geometry used to form the feature pattern 11 can be of various types, as described below. Figures 4 to 6 Here are some examples.

[0050] Figure 4 Different predetermined geometries are shown, all obtained by projecting a feature pattern on the bead 10 onto a plane perpendicular to the diametrical direction passing through the center of the feature pattern. In the following description, "maximum dimension of the predetermined geometry" and "maximum dimension of the feature pattern" refer to the dimensions of the bead 10. Figure 4 Dimensions measured in a similar projection plane.

[0051] Figure 4 (a) shows the predetermined geometry of a circle with a diameter of D. Figure 4 (b) shows the predetermined geometry of a square with a side length of L. Figure 4(c) shows a predetermined geometry of an equilateral triangle with a side length of L. To form a complete hollow pattern 20 within the handwriting line, each predetermined geometry must satisfy the dimensional relationship that its maximum dimension is less than the diameter of the bead 10. Alternatively, for ease of operation, the aforementioned dimensional relationship can also be considered satisfied if the maximum dimension of each predetermined geometry is less than the width of the handwriting line formed when writing normally with the bead 10. For example, when forming a handwriting line approximately 1.0 mm wide using a bead 10 with a diameter of 1.0 mm for normal writing, the maximum dimension of each predetermined geometry does not exceed 180 μm, but is not limited to this. Furthermore, the predetermined geometry is not limited to... Figure 4 The examples shown can also be other shapes, such as ovals, rectangles, pentagons, etc.

[0052] Figure 5 Taking a circle as an example, the positional relationship between two adjacent predetermined geometric shapes is shown. Figure 5 (a) shows the positional relationship of two intersecting circles. Figure 5 (b) shows the positional relationship of two circles that are tangent to each other. Figure 5 (c) shows the positional relationship of two circles that are far apart from each other (i.e., do not touch each other).

[0053] Figure 6 Examples of different configurations of multiple predetermined geometries are shown. Figure 6 (a) shows a configuration in which a circular predetermined geometry and a square predetermined geometry are adjacent to each other. Figure 6 (b) shows a configuration in which two circular predetermined geometries and one elliptical predetermined geometry are arranged side by side. Figure 6 (c) shows a configuration of two circular predetermined geometries and one triangular predetermined geometry in a triangular arrangement.

[0054] It should be noted that when the feature pattern 11 is formed by multiple predetermined geometric shapes, the outer contour of the entire feature pattern 11 has a relatively complex shape, which significantly improves its recognizability. Therefore, even when the maximum size of the entire feature pattern 11 is greater than or equal to the diameter of the bead 10 (or the width of the stroke line), the hollow pattern 20 formed by it still has significant recognizability and is easily identified correctly in magnified images. In other words, the maximum size of the feature pattern 11 can exceed the diameter of the bead 10 (or the width of the stroke line) while ensuring correct identification of the hollow pattern 20 in the stroke line. This provides a more flexible environment for designing micro token features.

[0055] Please note that the above describes the case where one feature pattern 11 is formed on the ball 10, but multiple (e.g., two, three or more) feature patterns 11 can be formed on the ball 10, and the outline, size and other elements of each feature pattern 11 can be the same or different from each other.

[0056] [Second Implementation]

[0057] The second embodiment is an anti-counterfeiting pen ball, which differs from the first embodiment in that the groove 13 is omitted, while the other structures are the same as those in the first embodiment. The ball in the second embodiment has a simpler structure, and therefore its manufacturing difficulty and cost are lower than those in the first embodiment.

[0058] In the second embodiment, a corresponding hollow pattern 20 can be formed in the pen stroke line by the feature pattern 11. However, since the groove 13 is omitted, the amount of ink near the outer edge of the feature pattern 11 is greater than in the first embodiment.

[0059] After the ink is transferred from the ball 10 to the paper 2, it diffuses to some extent within the paper fibers. Because the amount of ink at the edges of the hollow pattern 20 is greater than in the first embodiment, the edges of the hollow pattern 20 become blurred. Therefore, when using the anti-counterfeiting pen ball of the second embodiment, it is preferable to consider the adverse effects caused by the diffusion of ink within the paper fibers.

[0060] For example, the hollow pattern 20 can be made larger so that even if its edges are blurred, it will not affect the correct identification of the hollow pattern 20. Or, for example, when the ink spreads very little on the paper, and the blurring of the edges of the hollow pattern 20 is very slight, it will not affect the correct identification of the hollow pattern 20.

[0061] Figures 7 to 10 The images show photographs taken under a microscope of the hollow patterns formed in the handwriting by different anti-counterfeiting pen beads.

[0062] Figure 7 of (a) Figure 8 (a) and Figure 9 (a) shows photographs of pen marks obtained when the ball of the second embodiment is used as an anti-counterfeiting pen ball, in which Figure 7 (a) shows a hollow circular pattern. Figure 8 (a) shows a hollow pattern of a square. Figure 9 (a) shows a hollow pattern of a triangle. It can be seen that the edges of the hollow patterns of these three predetermined geometric shapes are unclear, with the circular hollow pattern being relatively well recognizable, while the hollow patterns of the square and triangle (especially the triangle) are less recognizable.

[0063] Figure 7 of (b) Figure 8 (b) and Figure 9 (b) shows photographs of the pen marks obtained when the ball of the first embodiment is used as an anti-counterfeiting pen ball, in which Figure 7 (b) shows the relationship with Figure 7 The same circular hollow pattern in (a), Figure 8 (b) shows the relationship with Figure 8 The same hollow square pattern in (a), Figure 9 (b) shows the relationship with Figure 9 The same hollow triangular pattern in (a). It can be clearly seen that the hollow patterns of these three predetermined geometric shapes are all clearly identifiable. This is because the presence of groove 13 improves the clarity of the edges of the hollow pattern 20.

[0064] Figure 10 The illustration shows a case where the feature pattern 11 is formed by multiple predetermined geometric shapes, all of which use the ball bearings of the first embodiment as anti-counterfeiting pen beads. Figure 10 In (a), the feature pattern 11 is formed by a predetermined circular geometry and a predetermined square geometry, and the maximum size of the feature pattern 11 is less than the width of the stroke line. Figure 10 In (b), the feature pattern 11 is formed by a predetermined geometry of three circles of different sizes arranged side by side, and the maximum size of the feature pattern 11 is greater than the width of the stroke line. It can be seen that... Figure 10 The edges of the hollow patterns corresponding to each predetermined geometric shape are all very clear.

[0065] [Third Implementation Method]

[0066] The third embodiment is a pen tip that includes the anti-counterfeiting pen ball of the first or second embodiment.

[0067] [Fourth Implementation Method]

[0068] The fourth embodiment is a pen that includes the pen tip of the third embodiment.

[0069] [Fifth Implementation Method]

[0070] The fifth embodiment is a method for manufacturing an anti-counterfeiting pen ball, applicable to the manufacture of anti-counterfeiting pen balls of the first or second embodiment. The method of the fifth embodiment includes the following:

[0071] The cleaning step involves cleaning the beads made of ink-receptive materials.

[0072] Before cleaning, the ball can be placed on the pen tip for easy fixing, clamping, and transfer. Alternatively, if other methods are used to fix, clamp, or transfer the ball, it can be placed on the pen tip after manufacturing. During cleaning, one or more methods can be used, such as deionized water, organic or inorganic solvents, plasma, or ultrasonic cleaning, to completely clean the surface of the ball.

[0073] The structural hole processing step involves forming a structural hole recessed towards the center of the ball on the ball after cleaning. The structural hole formed in this step is used to create a predetermined geometry on the surface of the ball.

[0074] Before machining the structured holes, the beads can be fixed in place. For example, a pen tip with beads attached can be fixed to a worktable. However, this is not a limitation; other methods can be used to fix the beads, as long as the structured holes can be machined. Structured holes can be formed on the beads using laser etching or chemical etching. For example, a femtosecond laser can be used to scan the beads and etch structured holes with the desired shape and size. For instance, a structured hole with a predetermined geometric shape, 140 μm in diameter and 350 μm in depth, can be machined.

[0075] The structural hole filling step involves filling the structural hole with a graphite-repellent material or forming a surface coating on the inner surface of the structural hole using a graphite-repellent material, thereby forming a predetermined geometry as a graphite-repellent feature pattern.

[0076] The properties of the ink used for writing can be considered when selecting a suitable ink-repellent material. For example, perfluoropolyether (PFPE) can be used as an ink-repellent material. However, this is not the only option; other suitable materials can also be used.

[0077] During the filling process, a tool (such as a microinjector with an accuracy of ±0.1 μL and a single-hole injection volume of 1~2 μL) can be used to inject liquid ink-repellent material into the structural pores until they are overflowing. After filling, a drying process can be performed to allow the material filled in the structural pores to completely solidify and form the desired feature pattern. Alternatively, a tool can be used to adhere the liquid ink-repellent material to the inner surface of the structural pores to form an ink-repellent surface coating, which can also form the desired feature pattern after drying. Here, the "inner surface of the structural pores" includes at least the surface of the inner sidewalls of the pores. For example, the "inner surface of the structural pores" can include the surface of the inner sidewalls of the pores and the bottom surface of the pores.

[0078] Optionally, the dried filler material can form a smooth surface and connection with the surrounding (existing) surface of the beads. In other words, the height of the filler material left at the opening of the structural hole after curing can be the same as the height of the corresponding position before the structural hole is processed.

[0079] After the above steps, the anti-counterfeiting pen ball of the second embodiment can be obtained. In manufacturing the anti-counterfeiting pen ball of the first embodiment, the groove can be formed through the following steps.

[0080] The groove processing step involves forming a groove around the outer contour of a feature pattern on the surface of the ball using laser etching. In this step, the groove is formed in a manner that prevents it from contacting the outer contour of the feature pattern.

[0081] During the machining of grooves, if the feature pattern has a complex geometry and configuration, it can easily create additional difficulties for the machining process. For example, in Figure 6 In the case shown in (c), the two endpoints of the predetermined triangular geometry are tangent to the predetermined circular geometry. It is very difficult to machine grooves near these two endpoints; therefore, grooves can be machined at a distance from these endpoints, or grooves can be left unmachined near these endpoints. Although ink diffusion may occur near the endpoints, this diffusion is limited and does not affect the accurate identification of the entire feature pattern. Therefore, in this disclosure, the statement "grooves surround the outer contour of the feature pattern" does not mean that the grooves surround the feature pattern continuously and without interruption, nor does it mean that the grooves must correspond precisely to the outer contour of the feature pattern. Rather, it allows for discontinuities or fluctuations in the grooves at local locations, as long as they do not affect the accurate identification of the entire feature pattern.

[0082] The following is a specific embodiment of the method according to the fifth implementation.

[0083] a. Place the unused pen tip (hereinafter referred to as "pen tip") in deionized water or anhydrous ethanol for ultrasonic cleaning; then transfer it to n-hexane for ultrasonic cleaning and dry.

[0084] b. Prepare a mixed solution of perfluorodecyltrichlorosilane (FDTS) and n-hexane, and completely immerse the beads in the mixed solution and let them stand.

[0085] c. Remove the pen tip and dry it.

[0086] d. Etching using a femtosecond laser. The laser beam is focused and processed according to a predetermined geometry to obtain a circular blind hole with a diameter of 140 μm and a depth of 350 μm on the surface of the ball.

[0087] e. Perform regional ink-repellent injection on beads with circular blind holes. First, add a thermal crosslinking agent (BTSE) to perfluoropolyether (PFPE), and use a microinjector to inject the mixed solution into the blind holes of the beads, ensuring that the solution is evenly distributed on the pore walls of the blind holes.

[0088] f. Place the pen tip in a vacuum drying oven to dry and cure the ink-repellent layer.

[0089] g. Focus the laser beam and process it according to the outline of a predetermined geometric shape. The outline of the predetermined geometric shape of the circle is concentric with the outline of the circular blind hole of the structure and is magnified by 1.5 times to obtain a V-shaped groove structure with a width of 28μm and a depth of 100μm.

[0090] h. Remove the pen tip and connect it to the ink cartridge to begin writing.

[0091] i. Using equipment (such as a magnifying glass, microscope, camera, mobile phone, etc.) to magnify and observe the handwriting, a circular hollow pattern with clear edges and a diameter of 140μm was observed in the handwriting, corresponding to the size and shape of the structural blind hole (microscopic token feature).

[0092] [Sixth Implementation Method]

[0093] The sixth embodiment is a handwriting identification method applicable to handwriting lines formed using any of the methods described in the first to fifth embodiments. The method of the sixth embodiment includes the following:

[0094] Select a sample area from the handwriting to be identified. There are no particular restrictions on the selection of the sample area; it can be flexibly selected based on the identification equipment used, the operator's habits, etc.

[0095] Obtain magnified images of the sample area. Microscopes can be used to obtain magnified images, but this is not the only method. Magnifying glasses, cameras, video cameras, mobile phones, and other similar devices can also be used.

[0096] Observe the handwriting in the magnified image to see if there is a predetermined characteristic pattern formed by hollow patterns. This step can be performed by manual visual observation, or with the aid of video equipment or other means.

[0097] The determination of whether the handwriting was written with a predetermined pen is based on the presence of a hollow pattern (i.e., a micro-token feature) corresponding to a predetermined characteristic pattern in the handwriting. As long as there is a connection between the predetermined pen and the writer, the handwriting can be determined from the identification results to determine whether it was written by a specific person. For example, a specific pen may be held by a specific person (or a person in a specific position), so only that specific person can write handwriting with the predetermined micro-token feature.

[0098] Of course, this handwriting identification method can also be combined with other existing handwriting identification methods for comprehensive consideration.

[0099] In the above embodiments, the ink used for writing is not limited to colored ink, but can also be other materials that can be used for writing, such as transparent ink that only develops color after UV irradiation, or liquids that absorb electromagnetic waves of a specific frequency. Therefore, the term "ink" in this disclosure should be understood in the broadest sense. Correspondingly, the concept of "paper" in this disclosure should also be understood in the broadest sense, which can refer to all media that can be used to hold "ink" and form handwriting.

[0100] In the above embodiments, for ease of understanding, circles, squares, and triangles are used as examples to illustrate the predetermined geometric shapes used to form the feature pattern 11. However, the representation of the feature pattern is not limited to these. For example, specific numbers, letters, characters, symbols, and other geometric shapes with complex outlines can also be used as predetermined geometric shapes, and feature patterns can be formed by using one predetermined geometric shape alone or by combining multiple predetermined geometric shapes. Therefore, the "predetermined geometric shape" in this disclosure should be understood in the broadest sense, and should not be simply equated with the most basic geometric figures.

[0101] The present disclosure has been described above with reference to exemplary embodiments; however, it should be understood that the present disclosure is not limited to these exemplary embodiments. The scope of the claims should be interpreted in the broadest sense to include all such variations, equivalent structures, and functions.

Claims

1. A counterfeit-proof pen ball (10), which has ink-receptive properties, characterized in that, One or more feature patterns (11) are formed on the anti-counterfeiting pen ball; The feature pattern (11) has an outline formed by a predetermined geometry; and A groove (13) is formed around the feature pattern (11), the groove (13) surrounding the outer contour of the feature pattern (11), wherein, One or more recessed structures (100) facing the center of the ball are formed on the anti-counterfeiting pen ball (10). The recessed structure (100) is used to form the predetermined geometry on the surface of the anti-counterfeiting pen bead (10), and The recessed structure (100) is provided with an ink-repellent material so that the pen bead area corresponding to the feature pattern (11) has ink repellency.

2. The anti-counterfeiting pen ball (10) according to claim 1, characterized in that, A gap (12) is formed between the groove (13) and the outer contour of the feature pattern (11) so that the groove (13) does not contact the outer contour of the feature pattern (11).

3. The anti-counterfeiting pen ball according to claim 1 or 2, characterized in that, Each of the feature patterns (11) includes at least one of the predetermined geometric shapes, and the maximum size of each of the predetermined geometric shapes is smaller than the diameter of the anti-counterfeiting pen bead (10).

4. The anti-counterfeiting pen ball according to claim 3, characterized in that, The feature pattern (11) includes a plurality of the predetermined geometric shapes, and any two adjacent predetermined geometric shapes form an intersecting, tangent or disjoint positional relationship.

5. A counterfeit-proof pen ball (10) having ink-receptive properties, characterized in that, One or more recessed structures (100) facing the center of the ball are formed on the anti-counterfeiting pen ball (10). The recessed structure (100) is used to form a predetermined geometry on the surface of the anti-counterfeiting pen ball (10); as well as The recessed structure (100) is filled with a repellent material or has a surface coating made of a repellent material, such that the predetermined geometry is formed as a repellent feature pattern.

6. A pen tip, characterized in that, The pen tip includes an anti-counterfeiting pen ball according to any one of claims 1 to 5.

7. A pen, characterized in that, The pen includes the pen tip according to claim 6.

8. A method for manufacturing an anti-counterfeiting pen ball, characterized in that, include: One or more recessed structures are formed on the ball toward the center of the ball, the recessed structures being used to form a predetermined geometry on the surface of the ball; as well as The recessed structure is filled with a pigment-repellent material or a surface coating is formed on the inner surface of the recessed structure using a pigment-repellent material, so that the predetermined geometry is formed as a pigment-repellent feature pattern.

9. The method according to claim 8, characterized in that, The recessed structure is formed on the ball using laser etching or chemical etching.

10. The method according to claim 8 or 9, characterized in that, After the feature pattern is formed, a groove is formed on the surface of the bead by laser etching to form a groove around the outer contour of the feature pattern.

11. The method according to claim 10, characterized in that, The groove is formed in such a way that it does not contact the outer contour of the feature pattern; The method further includes cleaning the ink-loving beads before forming the recessed structure.

12. A method for handwriting identification, characterized in that, include: Select a sample area from the handwriting to be identified; Obtain a magnified image of the sample region; Observe in the magnified image whether there is a predetermined feature pattern formed by hollow patterns in the handwriting; as well as Based on whether the predetermined feature pattern exists in the handwriting, it is determined whether the handwriting to be identified was written with a predetermined pen.

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