Cosmetic pencil

Abstract

The utility model relates to the technical field of cosmetic tools, and discloses a cosmetic brush which comprises a brush head and bristles, and a notch is formed in one end of the brush head; three or more bristles are correspondingly arranged at the notches and extend in the height direction; the bristles are divided into a plurality of bristle groups, the heights of the top ends of the bristles of each bristle group are the same, the bristle group at the highest position is defined as a first bristle group and the bristle group at the lowest position is defined as a second bristle group in the height direction of the pen point, and the length of a connecting line of the top ends of the bristles of the first bristle group is larger than or equal to that of a connecting line of the top ends of the bristles of the second bristle group. And the uniformity of lines formed by painting the cosmetic brush is improved, so that the hair flow is stronger.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetics, and in particular to a cosmetic brush. Background Art

[0002] Makeup pencils are one of the important tools for eyebrow and eye makeup. For example, they can be used for eyeliner outlining, eyebrow shaping, filling lower eyelashes, etc.

[0003] Currently, there are cosmetic brushes with multiple (three or more) bristles. However, since users are generally more accustomed to holding the cosmetic brush at an angle, when using the cosmetic brush to apply makeup, the bristles on the side closest to the skin will first contact the skin and bend, while the bristles on the other side are less likely to contact the skin. The bending positions of the bristles at different positions are at different lengths from the notch of the pen tip, resulting in difficult-to-control and uneven lines. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a cosmetic pencil to solve the problem that the lines drawn by the existing eyebrow pencil are difficult to control and have uneven thickness.

[0005] The cosmetic brush includes a brush head and bristles. A notch is formed at one end of the brush head; three or more bristles are arranged corresponding to the notch and extend in the height direction; the bristles are divided into multiple bristle groups, and the tips of the bristles in each bristle group are of the same height. Along the height direction of the brush head, the bristle group at the highest position is defined as the first bristle group, and the bristle group at the lowest position is defined as the second bristle group. The length of the line connecting the bristle tips of the first bristle group is greater than or equal to the length of the line connecting the bristle tips of the second bristle group.

[0006] Furthermore, the enclosed area formed by the cut portions of the plurality of bristles or the enclosed area formed by the top ends of the plurality of bristles in the same cross-sectional plane is diamond-shaped.

[0007] Furthermore, the enclosed area formed by the cut portions of the plurality of bristles or the enclosed area formed by the top ends of the plurality of bristles in the same cross-sectional plane is in the shape of a triangle.

[0008] Furthermore, the enclosed area formed by the cut portions of the plurality of bristles or the enclosed area formed by the top ends of the plurality of bristles in the same cross-sectional plane is a parallelogram.

[0009] Furthermore, the top ends of the multiple bristles are located in the same plane, and the plane where the top ends of the multiple bristles are located is defined as a brushing plane; the gap includes edge lines used to enclose the gap, and the edge lines are located in the same plane, and the surface formed by the edge lines is defined as a gap reference surface; wherein, the brushing plane is arranged parallel to the gap reference surface.

[0010] Furthermore, the top ends of the plurality of bristles are located in the same plane, and the plane where the top ends of the plurality of bristles are located is defined as a brushing plane, and the brushing plane is tilted relative to the height direction of the pen head.

[0011] Furthermore, the inclination angle between the brushing plane and the height direction of the pen head is 20° to 45°.

[0012] Furthermore, the multiple bristles in the bristle group are distributed in straight rows, and the distribution direction of the bristles is perpendicular to the height direction of the pen head.

[0013] Furthermore, the gap includes side lines used to enclose the gap, and the side lines are located in the same plane. The surface formed by the side lines is defined as the gap reference surface. Along the height direction of the pen tip, the side lines located at the highest position of the gap reference surface form a peak line, and the side lines located at the lowest position of the gap reference surface form a valley line, and the length of the peak line is greater than or equal to the length of the valley line.

[0014] Furthermore, the outline of the notch reference surface is a pentagon. Along the height direction of the pen tip, the pentagonal notch reference surface includes a top edge and a bottom point. The top edge is higher than the bottom point, so that the top edge forms a peak line and the bottom point forms a valley line.

[0015] Furthermore, the notch reference surface includes a trapezoidal portion and an inverted triangular portion that are interconnected. Along the height direction of the pen tip, the trapezoidal portion is located above the inverted triangular portion. The lower base of the trapezoidal portion is equal to the base of the inverted triangle in length and is collinear, so that the outline of the notch reference surface is diamond-shaped.

[0016] Furthermore, the trapezoidal portion is an isosceles trapezoid, and the inverted triangular portion is an isosceles triangle.

[0017] Furthermore, the outline of the notch reference surface is a triangle.

[0018] Furthermore, the outline of the notch reference surface is a parallelogram.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Regarding the multiple bristles at the notch, since the user will tilt the brush head close to the skin and apply the brush during use, the multiple bristles of the second bristle group will contact the skin first. During the process of dragging the bristles for application, the bristles that first contact the skin will bend more severely and may overlap with other bristles to form a cluster, resulting in the painted line being partially thickened and uneven. In this application, the length of the line connecting the bristle tips of the highest first bristle group is greater than or equal to the length of the line connecting the bristle tips of the lowest second bristle group. When applying, the tips of all the bristles can contact the skin together, thereby applying a more uniform eyebrow line with a stronger flow of hair.

[0021] 2. The shape and height of the notch reference surface of the pen tip are set to correspond to the shape and height of the top of the bristles, which can better conform to the user's holding habits and facilitate the user to hold the brush at an angle. During use, the user can conveniently use the top of all the bristles to brush, and the top of all the bristles can maintain a basically consistent bending position, making the drawn lines easier to control, and being able to draw more even lines, creating a more hair-like makeup look. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a structural diagram of an implementation of the cosmetic brush of the present application, wherein, in this view, the outline of the notch reference surface and the shape of the bristle distribution are both triangular.

[0024] Figure 2 for Figure 1 Schematic diagram of the pen head structure of a cosmetic brush, wherein, in this view, there is one notch.

[0025] Figure 3 for Figure 1 Schematic diagram of the pen head structure of a cosmetic brush, wherein in this view, there are multiple notches.

[0026] Figure 4 This is a structural diagram of an implementation method of the cosmetic brush of the present application, wherein, in this view, the outline of the notch reference surface and the shape of the bristle distribution are both parallelograms.

[0027] Figure 5 for Figure 4 Schematic diagram of the pen head structure of a cosmetic brush.

[0028] Figure 6 This is a structural diagram of an implementation of the cosmetic brush of the present application, wherein, in this view, the outline of the notch reference surface and the shape of the bristle distribution are both diamond-shaped.

[0029] Figure 7 for Figure 6 Schematic diagram of the pen head structure of a cosmetic brush.

[0030] Figure numerals: pen tip 1, bottom point 1-1, top edge 1-2, notch 2, side line 2-1, trapezoidal portion 2-2, inverted triangle portion 2-3, bristles 3, peak line 4, valley line 5, first bristle group 6, second bristle group 7. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0036] like Figure 1 As shown, the cosmetic brush provided in this embodiment comprises a brush head 1 and bristles 3. A notch 2 is defined at one end of the brush head 1, and multiple (three or more) bristles 3 are positioned corresponding to the notch 2. The bristles 3 extend parallel to the height of the brush head 1. Specifically, one end of the multiple bristles 3 is fixed within the brush head 1, while the other end extends outside the brush head 1 through the notch 2, allowing the bristles 3 to brush the user's skin surface.

[0037] There may be one or more notches 3 at the end of the nib 1 . The following description will be made based on the case where only one notch 3 is provided at the end of the nib 1 .

[0038] In order to clearly illustrate the technical solution of this application, the following are also defined: Figure 1 In this application, the height direction of the pen tip 1 refers to Figure 1 The up and down directions in .

[0039] As an implementation method, the bristles 3 are divided into bristle groups based on the height of the top of the bristles 3. Each bristle group includes one or more bristles 3 with the same top height, and the bristles 3 in the same bristle group are distributed in a straight line. The distribution direction of the bristles 3 is perpendicular to the height direction of the pen head, that is, the bristles 3 are distributed in a horizontal direction, thereby improving the uniformity of the arrangement of the bristles 3.

[0040] It should be noted that the orientation of the bristles 3 is consistent with the height direction of the pen tip.

[0041] Along the height direction of the pen head 1, the highest bristle group is defined as the first bristle group 6, and the lowest bristle group is defined as the second bristle group 7. The length of the top ends of the bristles 3 in the first bristle group 6 is greater than or equal to the length of the top ends of the bristles 3 in the second bristle group 7.

[0042] It should be noted that the "highest position bristle group" refers to the bristle group with the highest position of the bristle tips of the first bristle group 6, and does not specifically refer to the root or overall highest position of the first bristle group 6. Similarly, the "lowest position bristle group" refers to the bristle group with the lowest position of the bristle tips of the second bristle group 7.

[0043] Generally, when using the brush, the user will tilt the brush head 1 close to the skin for brushing. By shortening the length of the second bristle group 7 at the lowest position on its distribution straight line, the bristles 3 in the second bristle group 7 can be prevented from bending due to excessive bristles 3, thereby preventing the bristles 3 in the second bristle group 7 from overlapping with the bristles 3 in other bristle groups, thereby improving the uniformity of the brushed line (eyebrow line) and improving the aesthetics of the eyebrow line.

[0044] As an implementation method, the tips of the multiple bristles 3 collectively form a plane or curved surface, which is defined as the brushing surface. The brushing surface is tilted relative to the height direction of the pen head 1. When a user uses a cosmetic brush, the cosmetic brush is usually tilted relative to the user's skin surface. By tilting the brushing surface relative to the height direction of the pen head 1, more tips of the bristles 3 can contact the patient's skin surface, thereby improving the efficiency of the cosmetic brush.

[0045] The following description will be made by taking the brushing surface as an example. Specifically, there is a certain height difference between the top ends of the bristles 3 of adjacent bristle groups, so that the brushing plane is tilted relative to the height direction of the pen head 1.

[0046] As an implementation method, the height of the top of the bristles 3 decreases from the first bristle group 6 to the second bristle group 7. This makes the brushing surface formed by the top of the multiple bristles 3 more suitable for the user's usage habits, thereby improving the convenience of using the cosmetic brush.

[0047] Specifically, in order to achieve the goal of reducing the top height of the bristles 3 from the first bristle group 6 to the second bristle group 7, the length of the bristles 3 of each bristle group extending out of the gap 2 decreases from the first bristle group 6 to the second bristle group 7, so that the top height of adjacent bristle groups decreases successively.

[0048] Alternatively, the length of the bristles 3 of each bristle group extending out of the notch 2 is the same, so that the heights of the top ends of adjacent bristle groups decrease successively along the notch reference surface.

[0049] It should be noted that, in the present application, the bristles 3 of each bristle group are described as having the same length extending out of the notch 2 .

[0050] As an implementation, the brushing plane is tilted at an angle of 20° to 45° relative to the height of the pen tip 1. Furthermore, the brushing plane is tilted at an angle of 25° to 40° relative to the height of the pen tip 1. Furthermore, the brushing plane is tilted at an angle of 32.5° relative to the height of the pen tip 1.

[0051] Through the above arrangement, it is possible to avoid the inclination angle between the brushing plane and the pen head 1 in the height direction being too large, thereby ensuring that more tips of the bristles 3 can contact the user's skin, thereby improving the user's comfort.

[0052] The above arrangement can prevent the inclination angle between the brushing plane and the pen head 1 in the height direction from being too small, and also ensure that more tips of the bristles 3 can contact the user's skin, thereby improving the user's comfort.

[0053] As a way to implement Figure 1 and Figure 2 As shown, the notch 2 includes multiple edges 2-1 that enclose the notch 2. The multiple edges 2-1 lie in the same plane, and the surface enclosed by the edges 2-1 is defined as the notch reference surface. The brushing plane is arranged parallel to the notch reference surface. By arranging the brushing plane parallel to the notch reference surface, the installation of the bristles 3 is improved, thereby improving the production efficiency of the cosmetic brush.

[0054] It should be noted that the edge 2-1 can be a straight line or an arc, and the present application does not limit the shape of the edge 2-1. In order to more clearly describe the technical solution of the present application, the application describes the edge 2-1 as a straight line.

[0055] As a way to implement Figure 5 As shown, the enclosed area formed by the cut parts of multiple bristles 3 or the enclosed area formed by the top ends of multiple bristles 3 in the same cross-sectional plane is diamond-shaped. By distributing the multiple bristles 3 in a diamond-shaped structure, the bristles 3 can be more closely aligned with the shape of the user's eyebrows during brushing, making the eyebrow line formed by the bristles 3 more natural and beautiful. In this implementation, it is only necessary to ensure that the bristles 3 are distributed in a diamond shape. The outline of the notch reference surface can be any one of a triangle, a quadrilateral, a pentagon, a trapezoid, and a circle. Specifically, to ensure the aesthetics of the cosmetic brush and the support of the notch 2 for the bristles 3, the notch reference surface outline where the notch 2 is located adopts a pentagonal (diamond) shape. Furthermore, the edge of the notch 2 abuts against the side wall of the bristles 3 located at the edge of the notch 2.

[0056] It should be noted that, in this implementation, the diamond shape of the distribution of the bristles 3 is consistent with or similar to the diamond shape of the outline of the notch reference surface.

[0057] As another implementation, Figure 1 As shown, the enclosed area formed by the cut parts of multiple bristles 3 or the enclosed area formed by the top ends of multiple bristles 3 in the same cross-sectional plane is triangular. By distributing the multiple bristles 3 in a triangular structure, the amount of bristles 3 used can be reduced, thereby reducing the production cost of the eyebrow pencil.

[0058] Similarly, in this implementation, it is only necessary to ensure the shape structure of the distribution of the bristles 3. The shape of the gap 2 can be consistent with or different from the shape of the distribution of the bristles 3, which will not be elaborated in this implementation.

[0059] As another implementation, Figure 4As shown, the enclosed area formed by the cut portions of the multiple bristles 3 or the enclosed area formed by the top ends of the multiple bristles 3 in the same cross-sectional plane is a parallelogram. By distributing the multiple bristles 3 in a parallelogram structure, the assembly convenience of the bristles 3 can be improved, thereby reducing the production cost of the eyebrow pencil.

[0060] Similarly, in this implementation, it is only necessary to ensure the shape structure of the distribution of the bristles 3. The shape of the gap 2 can be consistent with or different from the shape of the distribution of the bristles 3, which will not be elaborated in this implementation.

[0061] As a way to implement Figure 1 and Figure 2 As shown, a notch 2 may be provided at the end of the pen tip 1 , and a plurality of bristles 3 may extend out of the pen tip 1 through the notch 2 , so as to improve the installation convenience of the bristles 3 .

[0062] As another implementation, Figure 3 As shown, the end of the pen tip 1 can also be provided with a plurality of notches 2, and the number of notches 2 is less than or equal to the number of bristles 3. When the number of notches 2 is the same as the number of bristles 3, each bristle 3 extends through one notch 2; when the number of notches 2 is less than the number of bristles 3, multiple bristles 3 extend through one notch 2. When the number of notches 2 is greater than one, the edge line 2-1 of the notch reference surface is the line connecting the outermost points of the notches 2. The edge line 2-1 is as shown in FIG. Figure 3 As shown by the double-dotted line in FIG, the notch reference surface is the enclosed area formed by connecting the lines of the outermost points of the notch 2. It should be noted that the present application is described as having a notch 2 at the end of the pen tip 1.

[0063] In this embodiment, along the height direction of the pen tip 1, the edge line located at the highest position of the notch reference surface forms a peak line 4, and the edge line located at the lowest position of the notch reference surface forms a valley line 5, and the length of the peak line 4 is greater than or equal to the length of the valley line 5.

[0064] It should be noted that the peak line 4 and the valley line 5 define the highest position and the lowest position of the notch reference surface, and the peak line 4 and the valley line 5 can be a line segment or an endpoint.

[0065] As a way to implement Figure 2 As shown, the outline of the notch reference surface is an inverted triangle, the peak line 4 of the inverted triangle notch reference surface is a long straight line segment, and the valley line 5 is the endpoint of one corner of the triangular notch reference surface. In this embodiment, the peak line 4 is longer than the valley line 5.

[0066] As another implementation, Figure 4 As shown, the outline of the notch reference surface is a parallelogram, and the peak line 4 and the valley line 5 of the parallelogram notch reference surface are both long straight line segments. In this embodiment, the length of the peak line 4 is equal to that of the valley line 5.

[0067] Furthermore, in this embodiment, the outline of the notch reference surface may be a rectangular structure or a diamond shape.

[0068] As another implementation, Figure 6 As shown, the outline of the notch reference surface is a pentagon. Along the height direction of the pen tip 1, the pentagonal notch reference surface includes a top edge 1-2 and a bottom point 1-1. The top edge 1-2 is located higher than the bottom point 1-1, so that the top edge 1-2 forms a peak line 4 and the bottom point 1-1 forms a valley line 5. In this embodiment, the peak line 4 is longer than the valley line 5.

[0069] In this implementation, the notch reference surface includes mutually connected trapezoidal portions 2-2 (such as Figure 7 The dotted line area) and the inverted triangle portion 2-3 (as shown Figure 7 In the area indicated by the dotted line), along the height direction of the pen tip 1, the trapezoidal portion 2-2 is located above the inverted triangle portion 2-3, and the lower base of the trapezoidal portion 2-2 is equal to the base of the inverted triangle 2-3 and is collinear, so that the outline of the notch reference surface is diamond-shaped.

[0070] Specifically, the trapezoidal portion 2-2 is an isosceles trapezoid, and the inverted triangular portion 2-3 is an isosceles triangle. It should be noted that the trapezoidal portion 2-2 can be a trapezoidal structure of other shapes, and the inverted triangular portion 2-3 can be other triangular structures. This application does not limit the specific structures of the trapezoidal portion and the inverted triangular portion.

[0071] As another implementation, the outline of the notch reference surface is circular, and the peak line 4 and the valley line 5 of the circular notch reference surface are both endpoints. In this embodiment, the peak line 4 is longer than the valley line 5.

[0072] As another implementation, the outline of the notch reference surface is a trapezoid, and the two parallel lines of the trapezoidal notch reference surface are respectively a peak line 4 and a valley line 5. In this embodiment, the peak line 4 is longer than the valley line 5.

[0073] In this embodiment, the two waistlines of the trapezoidal notch reference surface may be arc-shaped, with the middle of the waistline arched toward the top of the pen tip 1 . This embodiment does not limit the shape of the waistline.

[0074] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0075] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0076] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0077] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A cosmetic brush, characterized in that: include: A pen tip, one end of which is provided with a notch; Bristles, three or more of which are disposed correspondingly at the notches and extend in the height direction; The bristles are divided into multiple bristle groups, and the top heights of the bristles in each bristle group are the same. Along the height direction of the pen tip, the bristle group at the highest position is defined as the first bristle group, and the bristle group at the lowest position is defined as the second bristle group; The length of a line connecting the top ends of the bristles of the first bristle group is greater than or equal to the length of a line connecting the top ends of the bristles of the second bristle group.

2. The cosmetic brush according to claim 1, characterized in that The enclosed area formed by the cut parts of the plurality of bristles in the same cross-sectional plane or the enclosed area formed by the top ends of the plurality of bristles is in a diamond shape.

3. The cosmetic brush according to claim 1, characterized in that The enclosed area formed by the cut parts of the plurality of bristles or the enclosed area formed by the top ends of the plurality of bristles in the same cross-sectional plane is in a triangle shape.

4. The cosmetic brush according to claim 1, characterized in that The enclosed area formed by the cut parts of the plurality of bristles or the enclosed area formed by the top ends of the plurality of bristles in the same cross-sectional plane is a parallelogram.

5. The cosmetic brush according to any one of claims 1 to 4, characterized in that: The tips of the multiple bristles are located in the same plane, and the plane where the tips of the multiple bristles are located is defined as a brushing plane; The notch includes side lines for enclosing the notch, the side lines are located in the same plane, and a surface enclosed by the side lines is defined as a notch reference surface; Wherein, the brushing plane is arranged parallel to the notch reference surface.

6. The cosmetic brush according to claim 1, characterized in that The top ends of the plurality of bristles are located in the same plane, and the plane where the top ends of the plurality of bristles are located is defined as a brushing plane, and the brushing plane is tilted relative to the height direction of the pen head.

7. The cosmetic brush according to claim 6, characterized in that The inclination angle between the brushing plane and the height direction of the pen head is 20° to 45°.

8. The cosmetic brush according to claim 1 or 6, characterized in that: The multiple bristles in the bristle group are distributed in a straight row, and the distribution direction of the bristles is perpendicular to the height direction of the pen head.

9. The cosmetic brush according to claim 1, characterized in that The notch includes side lines used to enclose the notch, and the side lines are located in the same plane. The surface formed by the side lines is defined as the notch reference surface. Along the height direction of the pen tip, the side lines located at the highest position of the notch reference surface form a peak line, and the side lines located at the lowest position of the notch reference surface form a valley line, and the length of the peak line is greater than or equal to the length of the valley line.

10. The cosmetic brush according to claim 9, characterized in that The outline of the notch reference surface is a pentagon. Along the height direction of the pen tip, the pentagonal notch reference surface includes a top edge and a bottom point. The top edge is higher than the bottom point, so that the top edge forms a peak line and the bottom point forms a valley line.

11. The cosmetic brush according to claim 10, characterized in that The notch reference surface includes a trapezoidal portion and an inverted triangular portion that are interconnected. Along the height direction of the pen tip, the trapezoidal portion is located above the inverted triangular portion. The lower base of the trapezoidal portion is equal to the base of the inverted triangle in length and is collinear, so that the outline of the notch reference surface is diamond-shaped.

12. The cosmetic brush according to claim 11, characterized in that The trapezoidal portion is an isosceles trapezoid, and the inverted triangular portion is an isosceles triangle.

13. The cosmetic brush according to claim 9, characterized in that The outline of the notch reference surface is a triangle.

14. The cosmetic brush according to claim 9, characterized in that The outline of the notch reference surface is a parallelogram.

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