APPLICATOR

CROSS-REFERENCE TO THE RELATED APPLICATIONS

This application is based upon and claims priority to Chinese Patent Application No. 202311167021.8, filed on Sep. 11, 2023, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of makeup, and in particular to an applicator.

BACKGROUND

Mascara is an eyelash cosmetic widely applied in the beauty industry. When mascara is brushed to eyelashes, an applicator is used essentially to apply the mascara. The existing applicator includes a brush rod. The brush rod is provided with bristles. The bristles are shaped as a regular rectangle, a cylinder, a circular truncated cone, etc. The bristles are perpendicular to the brush rod. Hence, the bristles have a small material carrying capacity each time, and the user needs to dip the material frequently for makeup. This is inconvenient and time-consuming.

SUMMARY

The present application provides an applicator to overcome the above defects. Since target points on sections of bristles in the applicator are located on a spiral line, the present application improves a carrying capacity of the applicator for a cosmetic material, and achieves a better makeup effect.

To solve the technical problems, the present application employs the following technical solutions:

An applicator includes a brush rod, where M rows of bristles are arranged on the brush rod; the bristles each include a first end fixedly connected to the brush rod, and a second end being a free end; the second end of the bristle extends toward a direction away from the brush rod; there are N bristles in each row of bristles; target points are respectively provided on sections of at least two of the bristles; the target points are located on a same spiral line; and the first ends of the bristles in a same row are located in a same axial direction of the brush rod, M≥2, N≥2, and M and N each being an integer.

Optionally, the bristles on the same spiral line include at least a first bristle and a second bristle; the first bristle belongs to an i-th row of bristles; and the second bristle belongs to a j-th row of bristles.

Optionally, target points are respectively provided on sections of the bristles in the same row, and the target points are located on the same spiral line.

Optionally, target points are respectively provided on sections of all of the bristles, and the target points are located on the same spiral line.

Optionally, the applicator includes at least two spiral lines; a first group of target points are provided on sections of some bristles in the M rows of bristles; the first group of target points are located on one of the spiral lines; a second group of target points are provided on sections of remaining bristles in the M rows of bristles; and the second group of target points are located on the other of the spiral lines.

Optionally, different spiral lines have a same pitch.

Optionally, the spiral line has a pitch of 0.5 mm to 1.5 mm.

Optionally, a side of the bristle includes at least a curved surface and/or a twisted surface.

Optionally, the applicator further includes a brush handle; the brush rod includes a first end fixedly connected to the brush handle, and a second end being a free end; and the second end of the bristle inclines toward the second end of the brush rod.

Optionally, an inclination angle between a central axial section P of the bristle and a radial section Q of the brush rod is β, 1°<β<5°.

Optionally, the bristles in the same row have a same inclination angle toward the second end of the brush rod.

Optionally, the bristles in two adjacent rows have different inclination angles toward the second end of the brush rod.

Optionally, the bristle is a sheet structure, and an upper surface of the bristle is shaped as at least one of a petaloid structure with two small ends and a large middle, a polygonal structure, a semi-petaloid structure, and a notched petaloid structure.

Optionally, a cross-sectional area of the first end of the bristle is greater than a cross-sectional area of the second end of the bristle.

Optionally, there are two or more types of the bristles; different types of the bristles have different features; and the features of the bristles include at least one of a hardness, a color, a shape and a size.

Optionally, the bristles are a two-color injection molded plastic piece or a three-color injection molded plastic piece or a three-dimensional (3D) printed plastic piece.

Optionally, there are H types of the bristles; and the H types of the bristles include at least two types of bristles having different hardnesses, H≥2, and H being an integer.

Optionally, the bristles in the same row have a same hardness, and the bristles in two adjacent rows have different hardnesses.

Optionally, a connecting line for the second ends of the bristles in the same row includes at least one of a linear segment and a curve.

Optionally, the connecting line for the second ends of the bristles in the same row includes at least one of a raised arc, a recessed arc, a tailing peak, a leading peak, a multi-peak shape and an inverted V shape.

The present application has the following beneficial effects:

1) In the present application, the bristles in the same row are arranged along the same axial direction of the brush rod, and the target points on the sections of at least two bristles are located on the same spiral line. This improves a carrying capacity of the bristles for a cosmetic material, reduces a frequency of the applicator to dip the material, and achieves a higher makeup efficiency.

2) In the present application, the applicator includes the petaloid bristle, and the bristle is twisted axially along an axial center, such that the cosmetic material is attached to the bristle more easily. Meanwhile, the twisted bristle increases a contact surface with hair, such that eyelashes are fitted more easily. Therefore, the applicator in the present application makes the eyelashes attached to the bristle more easily, dips more material each time, and makes the material attached to the eyelashes more easily.

3) In the present application, the bristle inclines on the brush rod. With inclination between the bristle and the brush rod, the applicator can improve a carrying capacity of the cosmetic material between the bristles, and can curl the eyelashes to some extent when applying the hair such as the eyelashes, thereby achieving the better application effect.

4) In the present application, the bristles having different hardnesses are spaced. Compared with the bristles having a single hardness, this facilitates separation of the hair, and achieves a good makeup effect. The conventional bristles have a poor makeup effect if made of a material with a high hardness, and does not facilitate the separation of the hair if made of a material with a low hardness.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a first schematic structural view according to Embodiment 1 of the present application;

FIG. 2 is a second schematic structural view according to Embodiment 1 of the present application;

FIG. 3 is an enlarged view of A in FIG. 2;

FIG. 4 is a third schematic structural view according to Embodiment 1 of the present application;

FIG. 5 is a sectional view along B-B in FIG. 4;

FIG. 6 is an enlarged view of C in FIG. 5;

FIG. 7 is a fourth schematic structural view according to Embodiment 1 of the present application;

FIG. 8 is a first schematic structural view of a bristle according to the present application;

FIG. 9 is a second schematic structural view of a bristle according to the present application;

FIG. 10 is a second schematic structural view of a bristle according to the present application;

FIG. 11 is a first schematic structural view according to Embodiment 2 of the present application;

FIG. 12 is a second schematic structural view according to Embodiment 2 of the present application;

FIG. 13 is an enlarged view of D in FIG. 12;

FIG. 14 is a third schematic structural view according to Embodiment 2 of the present application;

FIG. 15 is a fourth schematic structural view according to Embodiment 2 of the present application;

FIG. 16 is a fifth schematic structural view according to Embodiment 2 of the present application;

FIG. 17 is an enlarged view of E in FIG. 16;

FIG. 18 is a sixth schematic structural view according to Embodiment 2 of the present application;

FIG. 19 is a first schematic structural view according to Embodiment 3 of the present application;

FIG. 20 is a second schematic structural view according to Embodiment 3 of the present application;

FIG. 21 is a third schematic structural view according to Embodiment 3 of the present application;

FIG. 22 is a fourth schematic structural view according to Embodiment 3 of the present application;

FIG. 23 is an enlarged view of F in FIG. 20;

FIG. 24 is a fifth schematic structural view according to Embodiment 3 of the present application;

FIG. 25 is a first schematic structural view according to Embodiment 4 of the present application;

FIG. 26 is a second schematic structural view according to Embodiment 4 of the present application;

FIG. 27 is a third schematic structural view according to Embodiment 4 of the present application;

FIG. 28 is a fourth schematic structural view according to Embodiment 4 of the present application;

FIG. 29 is an enlarged view of G in FIG. 28;

FIG. 30 is a fifth schematic structural view according to Embodiment 4 of the present application;

FIG. 31 is a first schematic structural view according to Embodiment 5 of the present application;

FIG. 32 is a second schematic structural view according to Embodiment 5 of the present application;

FIG. 33 is a third schematic structural view according to Embodiment 5 of the present application;

FIG. 34 is a sectional view along H-H in FIG. 33;

FIG. 35 is an enlarged view of J in FIG. 34;

FIG. 36 is a fifth schematic structural view according to Embodiment 5 of the present application; and

FIG. 37 is an enlarged view of K in FIG. 31.

In the figures: 10—brush rod, 20—bristle, 21—upper surface, 22—lower surface, and 30—brush handle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following describes the technical solutions in the embodiments of the present application clearly and completely with reference to the embodiments of the present application. Apparently, the embodiments described are merely some rather than all of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

It should be noted that the terms “first”, “second” and so on in the description and claims of present application and in the above accompanying drawings are intended to distinguish similar objects but do not necessarily indicate a specific order or sequence. It should be understood that the objects used in such a way may be exchanged under proper conditions to make it possible to implement the described implementations of present application in sequences except those illustrated or described herein. Moreover, the terms “include”, “have” and their variants mean to cover a non-exclusive inclusion. For example, a process, method, system, product or device that includes a list of steps or units is not necessarily limited to those steps or units which are clearly listed. Instead, they may include other steps or units which are not expressly listed or inherent to such a process, method, product, or device.

For ease of description, spatially relative terms, such as “above”, “on the upper side of”, “on the upper surface of” and “on”, can be used to describe the spatial positional relationship between components or features shown in the figure. It should be understood that the spatially relative terms are intended to encompass different orientations of the components in use or operation in addition to those shown in the figure. For example, if a component in the figure is inverted, it is described as a component “above other component or structure” or “on other component or structure”. Therefore, the component will be positioned as “below other component or structure” or “under other component or structure”. Therefore, the exemplary term “above” may include both orientations “above” and “below”. The component may also be positioned in other different ways (rotated by 90 degrees or in other orientations), but the relative description of the space should be explained accordingly.

As shown in FIGS. 1-37, an applicator includes brush rod 10. M rows of bristles 20 are arranged on the brush rod 10. Optionally, the bristles 20 each have upper surface 21 and lower surface 22 opposite to each other. The bristle 20 includes a first end fixedly connected to the brush rod 10, and a second end being a free end. The second end of the bristle 20 extends toward a direction away from the brush rod 10. There are N bristles 20 in each row of bristles 20. Target points are respectively provided on sections of at least two of the bristles 20, and the target points are located on a same spiral line. The first ends of the bristles 20 in a same row are located in a same axial direction of the brush rod 10. M≥2, N≥2, and M and N each are an integer. That is, there are at least two rows of bristles 20 on the brush rod 10, and at least two bristles 20 in each row of bristles 20. The first ends of the bristles 20 in the same row are located in the same axial direction of the brush rod 10, which refers to that centerpoints of the first ends of the bristles 20 in the same row are located in the same axial direction of the brush rod 10. The target points are respectively provided on the sections of the at least two of the bristles 20, and the target points are located on the same spiral line, which refers to that the target points on the sections of the at least two bristles 20 are located on a same virtual spiral line, and the sections each are a plane perpendicular to an axial center of the brush rod. In the present application, the bristles in the same row are arranged along the same axial direction of the brush rod 10, and the target points on the sections of at least two bristles are located on the same spiral line. This improves a carrying capacity of the bristles for a cosmetic material, reduces a frequency of the applicator to dip the material, and achieves a higher makeup efficiency.

The bristles 20 on the same spiral line may be located in a same row, and may also be located in different rows. Optionally, the bristles 20 on the same spiral line include at least a first bristle and a second bristle. The first bristle belongs to an i-th row of bristles. The second bristle belongs to a j-th row of bristles. i is not the same as j. That is, some bristles in two or more rows are located on the same spiral line.

In a possible implementation, target points are respectively provided on sections of the bristles 20 in the same row, and the target points are located on the same spiral line. That is, the target points on sections of all of the bristles in the same row are located on the same spiral line. The target points on the bristles in different rows may be located on the same spiral line, and may also be located on different spiral lines.

In another possible implementation, target points are respectively provided on sections of all of the bristles 20, and the target points are located on the same spiral line. That is, the target points on all bristles on the brush rod 10 are located on the same spiral line. This not only improves the carrying capacity of the bristles for the cosmetic material, but also can improve a curling capability of the bristles for eyelashes to achieve a better makeup effect.

In still another possible implementation, the applicator includes at least two spiral lines. A first group of target points are provided on sections of some bristles in the M rows of bristles 20. The first group of target points are located on one of the spiral lines. A second group of target points are provided on remaining bristles in the M rows of bristles 20. The second group of target points are located on the other of the spiral lines. That is, the target points are respectively provided on sections of some bristles, and these target points form the first group of target points. The target points are respectively provided on sections of remaining bristles, and these target points form the second group of target points.

The target points on the sections of the bristles 20 in the M rows are located on at least two different spiral lines. That is, in the M rows of bristles, the target points on the sections of at least two bristles are located on spiral line A, and the target points on the sections of at least two other bristles are located on spiral line B. The spiral line A and the spiral line B are different spiral lines.

Different spiral lines may have different pitches, and may also have a same pitch. Optionally, the different spiral lines have the same pitch.

Optionally, the spiral line has a pitch of 0.5 mm to 1.5 mm. The spiral line rises spirally along a clockwise direction or a counterclockwise direction.

In a possible implementation, a side of the bristle 20 includes at least a curved surface and/or a twisted surface. The side of the bristle 20 refers to the upper surface 21 and the lower surface 22 of the bristle. The upper surface 21 and/or the lower surface 22 of the bristle 20 includes the curved surface and/or the twisted surface. For example, the upper surface 21 of the bristle includes the curved surface, the twisted surface, and the curved surface and the twisted surface. Alternatively, the lower surface 22 of the bristle includes the curved surface, the twisted surface, and the curved surface and the twisted surface. Alternatively, both the upper surface 21 and the lower surface 22 of the bristle 20 include the curved surface, the twisted surface, and the curved surface and the twisted surface. That is, the bristle 20 is twisted, such that the cosmetic material like mascara is attached to the bristle 20 more easily. Meanwhile, the twisted bristle 20 increases a contact surface with hair such as the eyelashes, such that the eyelashes are fitted more easily. Therefore, the present disclosure makes the eyelashes attached to the bristle 20 more easily, dips more material each time, and makes the material attached to the eyelashes more easily. Since the applicator in the embodiment uses the bristle 20, the applicator including the bristle also achieves the same technical effects. Optionally, the bristle 20 is twisted entirely, or the first end of the bristle 20 is twisted, or the second end of the bristle 20 is twisted, or a middle of the bristle 20 is twisted, or both the first end and the second end of the bristle 20 are twisted. It is to be noted that the twisted position of the bristle 20 is an exemplary illustration, rather than a limit to the specific twisted position of the bristle.

As shown in FIG. 1, the applicator further includes brush handle 30. The brush rod 10 includes a first end fixedly connected to the brush handle 30, and a second end being a free end. The second end of the bristle 20 inclines toward the second end of the brush rod 10. With inclination between the bristle 20 and the brush rod 10, the applicator can improve the carrying capacity of the cosmetic material between the bristles 20, and can curl the eyelashes to some extent when applying the hair such as the eyelashes, thereby achieving the better application effect.

As shown in FIG. 31 and FIG. 37, an inclination angle between a central axial section P of the bristle 20 and a radial section Q of the brush rod 10 is β, 1°<β<5°. A direction from the first end to the second end of the bristle 20 is defined as an axial direction of the bristle. The central axial section of the bristle is a section along the axial direction of the bristle. The section passes through a centerline of the first end of the bristle 20. The centerline is a centerline along a circumferential direction of the brush rod 10. That is, the centerline of the first end of the bristle 20 is not located in a same circumferential direction of the brush rod 10.

A centerpoint of the first end of the bristle 20 is connected to a centerpoint of the second end of the bristle 20 to obtain straight line A. An included angle between the straight line A and the axial center of the brush rod 10 is an inclination angle of the bristle 20 toward the second end of the brush rod 10, and is referred to as the inclination angle of the bristle 20. Inclination angles of the bristles 20 in the same row may be the same, and may also be different. Optionally, the bristles 20 in the same row have a same inclination angle toward the second end of the brush rod 10. That is, all of the bristles 20 in the same row have a same inclination angle.

Inclination angles of the bristles 20 in different rows may be the same, and may also be different. Optionally, the bristles 20 in two adjacent rows have different inclination angles toward the second end of the brush rod 10. Optionally, the inclination angles of the bristles 20 in different rows are different. Alternatively, the M rows of bristles 20 are divided into P groups. The bristles in each group have a same inclination angle. The bristles in different groups have different inclination angles. P≥2. For example, there are nine rows of bristles on the brush rod 10. The nine rows of bristles are divided into three groups, with three rows of bristles forming one group. The inclination angles of the bristles in the three groups are different. That is, the bristles have three different inclination angles.

As shown in FIG. 4, the bristle 20 has the upper surface 21 and the lower surface 22 opposite to each other. The bristles 20 include bristles having different upper surfaces 21. The bristle 20 having the large upper surface 21 is defined as a big bristle. The bristle 20 having the small upper surface 21 is defined as a small bristle. An inclination angle of the big bristle toward the second end of the brush rod 10 is less than an inclination angle of the small bristle toward the second end of the brush rod 10. The big bristle and the small bristle are obtained by comparing two bristles having different upper surfaces. In the embodiment, by providing the bristles having different upper surfaces on the brush rod, and providing the bristles having different sizes at different inclination angles, various bristles having different inclination angles cooperate to catch the eyelashes to achieve a better application effect.

In a possible implementation, the bristles 20 in two adjacent rows are respectively defined as bristles A and bristles B. The bristles A and bristles B are spaced to each other. An area of the upper surface of each of the bristles A is greater than an area of the upper surface of each of the bristles B. All of the bristles A have a same inclination angle and a same upper surface. All of the bristles A have a same inclination angle and a same upper surface. The inclination angle of the bristle A toward the second end of the brush rod 10 is less than the inclination angle of the bristle B toward the second end of the brush rod 10. In the embodiment, two different types of bristles are spaced, the bristle having the large upper surface has the small inclination angle, and the bristle having the small upper surface has the large inclination angle. In application, two bristles having different inclination angles cooperate to catch the eyelashes to achieve the better application effect.

The bristle 20 is a sheet structure. The upper surface of the bristle 20 is shaped as at least one of a petaloid structure with two small ends and a large middle, a polygonal structure, a semi-petaloid structure, and a notched petaloid structure. Optionally, the bristle 20 is the sheet structure. For the same bristle, a shape of the upper surface 21 and a shape of the lower surface 22 are the same. The upper surface 21 and the lower surface 22 of the bristle 20 are connected through circumferential sides. In a first possible implementation, as shown in FIG. 10, the upper surface of the bristle 20 is shaped as the petaloid structure with the two small ends and the large middle, in which the second end is smaller than the first end, a connecting line between the first end and the second end is an arc, and a widest portion in the middle is close to the second end of the bristle. In a second possible implementation, as shown in FIG. 36, different from the first impossible implementation, a widest portion in the middle is close to the first end of the bristle. In a third possible implementation, different from the first impossible implementation, a widest portion in the middle has a same distance away from the first end and the second end. In a fourth possible implementation, the bristle is a half of the bristle along the central axial section in the first possible implementation. In a fifth possible implementation, as shown in FIG. 22, the bristle is a half of the bristle along the central axial section in the second possible implementation. In a sixth possible implementation, the bristle is a half of the bristle along the central axial section in the third possible implementation. That is, the upper surface of the bristle is shaped as an arched structure in the fourth possible implementation to the sixth possible implementation. In a seventh possible implementation, the bristle is shaped as the semi-petaloid structure, and the upper surface of the bristle 20 is provided with a multi-peak structure. In an eighth possible implementation, as shown in FIG. 14, the upper surface of the bristle 20 is shaped as the polygonal structure, such as a pentagonal structure, a hexagonal structure and a heptagonal structure. In a ninth possible implementation, as shown in FIG. 4, a cross section of the bristle 20 is shaped as a notched petaloid structure. That is, the upper surface of the bristle 20 is provided with one, two or more notches. The structure of the bristle in the implementation can be obtained by machining the notch on the bristle in the first possible implementation to the eighth possible implementation.

A sectional area of the first end of the bristle 20 is greater than a sectional area of the second end of the bristle 20. The sectional area of the first end of the bristle 20 refers to an area of a junction between the first end of the bristle 20 and the brush rod 10. The sectional area of the second end of the bristle 20 refers to an area of a side of the free end of the bristle 20. As shown in FIG. 18, the bristle has the thick first end and the fine second end. Optionally, the bristle is tapered off from the first end to the second end. That is, for any two points D and E between the first end and the second end of the bristle, the point D is closer to the first end than the point E, and a longitudinal sectional area of the bristle corresponding to the point D is greater than a longitudinal sectional area of the bristle corresponding to the point E. The so-called longitudinal sectional area refers to a section parallel to the first end.

There are two or more types of the bristles 20. Different types of the bristles 20 have different features. The features of the bristles 20 include at least one of a hardness, a color, a shape and a size. That is, the bristles 20 may be made of resin materials having different hardnesses and/or different colors. The bristles may also be designed into different shapes and/or sizes.

The bristles 20 are a two-color injection molded plastic piece or a three-color injection molded plastic piece or a 3D printed plastic piece. When the bristles are made of two or more different plastic materials, two-color injection molding or three-color injection molding or 3D printing may be used. Certainly, when all bristles are made of a same plastic material, single-color injection molding or the 3D printing may be used.

There are H types of the bristles 20. The H types of the bristles 20 include at least two types of bristles having different hardnesses. H≥2, and H is an integer. That is, the bristles 20 may be made of two or more different plastic materials, or made of a same plastic material with different hardnesses.

Optionally, the bristles 20 in the same row have a same hardness, and the bristles 20 in two adjacent rows have different hardnesses. The bristles 20 in the two adjacent rows are respectively defined as bristles F and bristles H. A hardness of the bristles F is greater than a hardness of the bristles H. The bristles F and the bristles H are spaced to each other. Usually, the bristle with the high hardness facilitates separation of the hair, and the bristle with the low hardness is more prone to makeup. In the embodiment, the bristles having different hardnesses are spaced. Compared with the bristles having a single hardness, this facilitates separation of the hair, and achieves a good makeup effect. The conventional bristles have a poor makeup effect if made of a material with a high hardness, and does not facilitate the separation of the hair if made of a material with a low hardness.

The bristles 20 have a Shore hardness D of 35 to 82, and a tensile modulus of 35 MPa, such as 35 shore D Hytrel® to 1180 MPa from the DuPont, and 82 shore D Hytrel® from the DuPont. Optionally, the bristles 20 have a Shore hardness D of 45 to 72, and a tensile modulus of 95 MPa, such as 45 shore D Hytrel® to 570 MPa from the DuPont, and 72 shore D Hytrel® from the DuPont. Optionally, the bristles 20 have a Shore hardness D of 55 to 63, and a tensile modulus of 200 MPa, such as 55 shore D Hytrel®) to 280 MPa from the DuPont, and 63 shore D Hytrel® from the DuPont. In a possible implementation, the bristles 20 each include a first sub-bristle and a second sub-bristle. The first sub-bristle has a Shore hardness of D63, and the second sub-bristle has a Shore hardness of D47.

The bristles 20 are made of one of a silicone elastomer, a thermoplastic elastomer such as a styrene-ethylene-butylene-styrene block copolymer (SEBS), an ethyl vinyl acetate (EVA) elastomer, a thermoplastic polyester elastomer such as Hytrel® from the DuPont, a thermoplastic polyurethane elastomer such as Pellethane® produced by the Dow Plastic Company, nitrile and ethylene propylene diene monomer (EPDM).

A connecting line for the second ends of the bristles 20 in the same row includes at least one of a linear segment and a curve. The connecting line for the second ends of the bristles 20 is a connecting line for centerpoints of the second ends of the bristles. The connecting line for the second ends of the bristles 20 includes at least one curve, or at least two linear segments, or at least one linear segment and at least one curve. That is, at least two of the bristles 20 in the same row have different heights. The connecting line for the second ends of the bristles 20 in the same row includes at least one of a raised arc, a recessed arc, a tailing peak, a leading peak, a multi-peak shape and an inverted V shape.

Embodiment 1: As shown in FIGS. 1-6, brush rod 10 is connected to brush handle 30. Eight rows of bristles 20 are arranged on the brush rod 10. The bristles 20 each have upper surface 21 and lower surface 22 opposite to each other. Target points on sections of all of the bristles 20 are located on a same spiral line. The bristles in a same row have a same shape, but different heights. Adjacent bristles 20 are structurally different. The eight rows of bristles 20 are divided into two types, which are respectively defined as bristles C and bristles D. The bristles C and the bristles D are spaced. As shown in FIG. 4, the upper surface of each of the bristles C is shaped as a petal with a notch. The notch is located at a first end of the bristle C. As shown in FIG. 2, a connecting line for second ends of the bristles C in the same row is shaped as a raised arc. Referring also to FIG. 4, the upper surface of each of the bristles D is shaped as a pedal with two notches. The two notches are located in a middle of the bristle D. As shown in FIG. 5, a connecting line for second ends of the bristles D in the same row includes a recessed arc and a linear segment. As shown in FIG. 4, an included angle between two adjacent rows of bristles 20 is a, a being 45°.

Embodiment 2: As shown in FIGS. 11-18, brush rod 10 is connected to brush handle 30. Twelve rows of bristles 20 are arranged on the brush rod 10. The bristles 20 each have upper surface 21 and lower surface 22 opposite to each other. Target points on sections of all of the bristles 20 are located on a same spiral line. The bristles in a same row have a same shape, but different heights. Adjacent bristles 20 are structurally different. The twelve rows of bristles 20 are divided into three types, which are respectively defined as bristles C, bristles D and bristles E. The bristles C have the largest upper surface, and the bristles E have the smallest upper surface. There are six rows of bristles C, three rows of bristles D and three rows of bristles E. The bristles C is spaced apart from the bristles D or the bristles D. As shown in FIG. 14 and FIG. 18, the upper surface of each of the bristles C is shaped as a quadrangle. As shown in FIG. 16, a connecting line for second ends of the bristles C in the same row includes three linear segments, in which the linear segment in the middle is parallel to an axial center of the brush rod 10, and the linear segments at two ends incline. Referring also to FIG. 14 and FIG. 18, the upper surface of each of the bristles D is shaped as a pedal, and the upper surface of each of the bristles E is shaped as a pentagon. As shown in FIG. 12, a connecting line for second ends of the bristles D in the same row includes a recessed arc and a linear segment. A connecting line for second ends of the bristles E in the same row is a raised arc. As shown in FIG. 14, an included angle between two adjacent rows of bristles 20 is b, b being 30°.

Embodiment 3: As shown in FIGS. 19-24, brush rod 10 is connected to brush handle 30. Twelve rows of bristles 20 are arranged on the brush rod 10. The twelve rows of bristles 20 are divided into six pairs. Two rows of bristles 20 in each pair are provided back to back. The bristles 20 each have upper surface 21 and lower surface 22 opposite to each other. Target points on sections of all of the bristles 20 are located on a same spiral line. The bristles in a same row have a same shape, but different heights. Adjacent bristles 20 are structurally different. The twelve rows of bristles 20 are divided into two types, which are respectively defined as bristles C and bristles D. The bristles C and the bristles D are spaced. As shown in FIG. 22 and FIG. 24, the upper surface of each of the bristles C is shaped as a half raised petal. As shown in FIG. 20 and FIG. 24, a connecting line for second ends of the bristles C in the same row is shaped as a raised arc. Referring also to FIG. 22 and FIG. 24, the upper surface of each of the bristles D is shaped as a half recessed pedal. As shown in FIG. 19 and FIG. 24, a connecting line for second ends of the bristles D in the same row includes a recessed arc and a linear segment. As shown in FIG. 22, an included angle between two adjacent rows of bristles 20 is c, c being 30°. The included angle between the two adjacent rows of bristles is an included angle between planes of the bristles.

Embodiment 4: As shown in FIGS. 25-30, different from Embodiment 3, ten rows of bristles 20 are arranged on a brush rod. The ten rows of bristles 20 are divided into five pairs. As shown in FIG. 30, an included angle between two adjacent rows of bristles 20 is d, d being 360.

Embodiment 5: As shown in FIGS. 31-37, brush rod 10 is connected to brush handle 30. Eight rows of bristles 20 are arranged on the brush rod 10. The bristles 20 each have upper surface 21 and lower surface 22 opposite to each other. Target points on sections of all of the bristles 20 are located on a same spiral line. All bristles have a same shape, but different heights.

The eight rows of bristles 20 are divided into two types, which are respectively defined as bristles C and bristles D. The bristles C and the bristles D are spaced. As shown in FIG. 33 and FIG. 36, the upper surface of each of the bristles C and the upper surface of each of the bristles D are shaped as a petal. At a same radial position of the brush rod 10, the upper surface of the bristle C is smaller than the upper surface of the bristle D. As shown in FIG. 32 and FIG. 36, a connecting line for second ends of the bristles C in the same row is shaped as a raised arc. As shown in FIG. 34 and FIG. 36, a connecting line for second ends of the bristles D in the same row includes a recessed arc and a linear segment. As shown in FIG. 33, an included angle between two adjacent rows of bristles 20 is e, e being 45°.

It should be noted that those of ordinary skill in the art can further make variations and improvements without departing from the conception of the present application. These variations and improvements all fall within the protection scope of the present application. Therefore, the protection scope of present application shall be subject to the appended claims.

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