Cutterhead, head structure and personal care device

Abstract

The present disclosure relates to a cutter net, a head structure and a personal care device, the cutter net having a rotation axis and being configured to rotate around the rotation axis in a predetermined direction; the cutter net has an annular shaving track arranged around the rotation axis, the annular shaving track has a plurality of capture holes, and the capture holes have a front wall surface and a rear wall surface as viewed in the predetermined direction, the front wall surface is formed with a fixed cutting edge adjacent to the edge of the inner surface of the annular shaving track; the fixed cutting edge is configured as a curved shape, and the middle part of the fixed cutting edge is raised towards the predetermined direction. The technical solution provided by the present disclosure can improve the shearing efficiency and the smoothness of use.

Description

Technical Field

[0001] This disclosure relates to the technical field of personal care products, and particularly to a blade mesh, head structure, and personal care device. Background Technology

[0002] Electric shavers typically utilize the relative motion between a foil and a rotating blade. The moving cutting edge of the rotating blade works in conjunction with the fixed cutting edge of the foil to cut the hair.

[0003] However, during the hair cutting process, the moving and fixed cutting edges cannot always effectively cut the beard, thus affecting the cutting efficiency and easily causing a pulling sensation, which affects the user experience. Utility Model Content

[0004] The purpose of this disclosure is to provide a blade mesh, head structure, and personal care device that can improve cutting efficiency and smoothness of use.

[0005] According to one aspect of this disclosure, a foil for a shaving unit is provided, the foil having an axis; the foil having an annular shaving track arranged around the axis for cooperating with a rotating blade, the rotating blade rotating in a predetermined direction, the annular shaving track having a plurality of capture holes, and the capture holes having a front wall surface and a rear wall surface when viewed along the predetermined direction, the front wall surface having a fixed cutting edge formed at an edge adjacent to the inner surface of the annular shaving track; the fixed cutting edge is configured to be curved in at least its orthographic projection on a plane perpendicular to the axis, the middle portion of the fixed cutting edge bulging toward the predetermined direction.

[0006] This disclosure constructs the orthographic projection of the fixed cutting edge onto a plane perpendicular to the axis as a curve. Utilizing the gradually changing tangent at each point on the curve, the shearing angle changes gradually throughout the shearing stroke of both the moving and fixed cutting edges—from contact to separation. This smoother change prevents sudden changes in the shearing angle that could cause a pulling sensation and pause in shaving, ensuring a consistent shaving experience and improving the smoothness of the personal care device. Furthermore, because the shearing angle changes gradually throughout the stroke, multiple shearing angles of varying values ​​exist within each shearing segment. This allows for shearing from multiple positions within each segment, ensuring that adjacent segments provide similar and effective shearing results. In other words, the entire moving and fixed cutting edges can be effectively sheared, resulting in a larger effective shearing area and improved shearing efficiency.

[0007] Meanwhile, by raising the middle part of the fixed cutting edge toward a predetermined direction, the moving cutting edge and the fixed cutting edge can enclose a cutting space within a cutting stroke, and the cutting space gradually shrinks until it disappears. In this way, as the cutting space gradually shrinks, it can gather the hair, reduce the possibility of the hair being pushed out of the cutting area and causing cutting failure, and further improve the cutting efficiency.

[0008] According to another aspect of this disclosure, a head structure is provided, the head structure including a supporting base shell, a supporting bracket, and at least one shaving unit, wherein the supporting bracket is detachably connected to the supporting base shell; the shaving unit includes a rotating blade and the aforementioned blade foil, the rotating blade being located within the blade foil, and the blade foil being disposed on the supporting bracket.

[0009] According to another aspect of this disclosure, a personal care device is provided, the personal care device including a base structure and a head structure coupled to the base structure, wherein the base structure houses a drive component and a drive output component, the drive output component being coupled to the drive component; the head structure includes a supporting base shell, a supporting bracket, and a shaving unit, the supporting base shell being coupled to the base structure, the supporting bracket being detachably connected to the supporting base shell, the shaving unit including a rotary blade and the aforementioned foil, the rotary blade being located within the foil and rotatable relative to the foil, the foil being disposed on the supporting bracket, and the rotary blade being tractively connected to and driven by the drive output component. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A partial structural cross-sectional view of a personal care device according to an embodiment of the present disclosure is shown;

[0012] Figure 2 An exploded schematic diagram of a shaving unit according to an embodiment of the present disclosure is shown;

[0013] Figure 3 A schematic diagram of the first angle of a rotating blade according to an embodiment of the present disclosure is shown;

[0014] Figure 4 A schematic diagram of a first angle of a blade mesh according to an embodiment of the present disclosure is shown;

[0015] Figure 5A partial structural schematic diagram of the cooperation between a rotating blade and a blade mesh according to an embodiment of the present disclosure is shown;

[0016] Figure 6 A schematic diagram illustrating the process of a moving cutting edge gradually moving towards a fixed cutting edge according to an embodiment of the present disclosure is shown.

[0017] Figure 7 It shows Figure 6 Diagram showing the change in shear angle during motion;

[0018] Figure 8 A schematic diagram illustrating the process of a moving cutting edge gradually moving towards a fixed cutting edge according to an embodiment of the present disclosure is shown.

[0019] Figure 9 A schematic diagram of a dynamic cutting edge according to an embodiment of the present disclosure is shown;

[0020] Figure 10 A schematic diagram of the second angle of the blade mesh according to an embodiment of the present disclosure is shown;

[0021] Figure 11 A schematic diagram of the blade mesh from a third angle according to an embodiment of the present disclosure is shown;

[0022] Figure 12 A schematic diagram of the second angle of a rotating blade according to an embodiment of the present disclosure is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1000, Shaving unit; 2000, Support base shell; 3000, Support bracket; 4000, Base structure;

[0025] 100. Rotating blade; 101. Rotation axis; 102. Predetermined direction; 110. Cutter head; 120. Cutting blade; 121. Moving cutting edge; 1211. Second intermediate section; 1212. Third edge section; 1213. Fourth edge section; 122. Inner blade assembly; 123. Outer blade assembly; 130. Mating shaft;

[0026] 200. Blade mesh; 210. Annular shaving track; 211. Inner circumferential side surface; 212. Outer circumferential side surface; 213. First shaving track; 214. Second shaving track; 215. Rib; 220. Capture hole; 221. Front wall surface; 222. Rear wall surface; 223. Fixed cutting edge; 2231. First intermediate section; 2232. First edge section; 2233. Second edge section; 230. Top cover; 231. Intermediate base; 2311. Positioning shaft; 240. Annular wall; 241. Main body; 242. Flange;

[0027] α, shear angle; γ, shear space. Detailed Implementation

[0028] Electric shavers typically combine multiple shaving units on a shaving head, such as using three shaving units in an equilateral triangle configuration. Each shaving unit usually includes a foil and a rotating blade. During shaving, hair is captured by capture holes on the foil and enters the shaving unit. The foil and the rotating blade move relative to each other, and the moving cutting edge of the rotating blade interacts with the fixed cutting edge of the foil to cut the hair.

[0029] However, some related technologies use a combination of straight moving and fixed cutting edges to cut hair. But this method does not have a hair-gathering effect. When the hair enters the capture hole, it may be pushed out of the cutting area, resulting in cutting failure. Furthermore, the cutting angle of the straight moving and fixed cutting edges is fixed. When dealing with hair of different thicknesses and textures, the fixed cutting angle may be too small for coarse beards, resulting in insufficient cutting force and difficulty in shaving cleanly in one go, requiring repeated shaving. On the other hand, for fine beards, the cutting angle may be relatively too large, easily pulling the beard, making the shaving process less smooth, and may also irritate the skin, resulting in a pulling sensation and ineffective cutting.

[0030] To address this, attempts were made to use a combination of a V-shaped fixed cutting edge and a V-shaped moving cutting edge in razors to cut hair. The V-shape can be understood as a structure composed of two straight segments forming an angle, with the connection point between the two segments potentially forming an arc. This V-shape could effectively gather hair during the cutting process, improving cleaning efficiency. However, research revealed that, on one hand, the corresponding capture hole of the V-shaped fixed cutting edge is also V-shaped, with a relatively sharp middle section, ineffectively creating a scalp-removing effect. This leads to stress concentration on the user's skin surface, easily causing skin strain. On the other hand, the connecting part of the V-shaped fixed and moving cutting edges is mainly composed of straight segments. This means that during the hair cutting process, the cutting angle remains constant for most of the time, only decreasing sharply at the connection point of the two straight segments.

[0031] The difference in shearing angles between straight and curved segments is precisely what makes the hair-cutting schemes using both fixed and moving V-shaped cutting edges different. The straight segment's shearing angle remains constant, meaning both cutting edges always contact the hair at the same angle, resulting in an inability to adapt to various hair types and a relatively poor cutting effect. Conversely, the curved segment's shearing angle gradually changes, allowing the two cutting edges to contact the hair at different angles. This adapts to hair of varying thicknesses, resulting in a cleaner shave, more even force distribution, reduced pulling force on the hair, and less skin irritation. In other words, in the V-shaped fixed and moving V-shaped cutting edge combination hair-cutting scheme, the cutting area is mainly concentrated at the curved segment where they connect, leading to a smaller overall cutting area and impacting cutting efficiency. Furthermore, when the V-shaped fixed cutting edge and the V-shaped moving cutting edge move from the straight segment contact shearing to the arc segment contact shearing, there is a sudden change in the shearing angle, that is, it suddenly gradually decreases from a constant state. This not only makes it easy to pull the hair, but also results in a large difference in the shaving experience before and after the two segments due to the different changes in the shearing angle. Sudden stinging is likely to occur, causing the shaving to stop, affecting the smoothness of the razor and the user experience.

[0032] To address this, this disclosure further incorporates a curved structure for at least one of the moving and fixed cutting edges. This ensures that throughout the entire cutting stroke of both edges—from contact to separation—the cutting angle gradually changes. This results in a consistent cutting effect at every point, guaranteeing effective cutting at every stage, leading to a larger effective cutting area and higher cutting efficiency. Furthermore, the process is seamless, providing a consistent shaving experience and preventing sudden stops, thus improving smoothness and overall user experience.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this disclosure, but not all embodiments.

[0034] like Figure 1As shown, this disclosure provides a personal care device, which may include a base structure 4000 and a head structure coupled to the base structure 4000. The base structure 4000 houses at least a power source, a drive component, and a drive output component. The drive output component is coupled to the drive component, and the drive component drives the drive output component to rotate. The energy source provides power to the drive component. The head structure includes a supporting base shell 2000, a supporting bracket 3000, and at least one shaving unit 1000. The supporting base shell 2000 is coupled to the base structure 4000, and the supporting base shell 2000 and the base structure 4000 may be fixedly connected or may have a certain degree of rotation or floating. The shaving unit 1000 is mounted on the supporting bracket 3000, which provides support for the shaving unit 1000. The supporting bracket 3000 is detachably connected to the supporting base shell 2000 to facilitate the cleaning of hair clippings located between the supporting bracket 3000 and the supporting base shell 2000.

[0035] In practical applications, the number of shaving units 1000 can be one, two, or three, etc. When there are multiple shaving units 1000, each shaving unit 1000 rotates around its own rotation axis. The personal care device can be a razor, hair trimmer, etc. for shaving hair, or a lint remover for trimming lint balls, etc., and this disclosure does not specifically limit it in this regard.

[0036] For details regarding the specific structure of the shaving unit 1000, please refer to [link / reference needed]. Figures 2 to 6 As shown, in some embodiments, the shaving unit 1000 may include a rotary blade 100, which serves as the active cutting component of the shaving unit 1000. The rotary blade 100 has a rotation axis 101 and rotates about the rotation axis 101 in a predetermined direction 102, wherein the predetermined direction 102 may be clockwise or counterclockwise about the rotation axis 101. Specifically, the rotary blade 100 may include a blade disc 110 and a plurality of cutting blades 120 located on one end face of the blade disc 110. The cutting blades 120 have a moving cutting edge 121, such that the cutting blades 120 participate in the cutting operation through the moving cutting edge 121. It should be noted that the edge portion of the cutting blade 120 that participates in the cutting is the moving cutting edge 121. The moving cutting edge 121 may be the entire front edge of the cutting blade 120 along the predetermined direction 102, or it may refer to a portion of the front edge of the cutting blade 120 along the predetermined direction 102; there is no specific limitation in this regard.

[0037] For example, the rotary blade 100 may be formed from a single metal sheet through stamping and bending processes, and the cutting blade 120 may be connected to the cutter head 110 via a support leg. The cutter head 110, the support leg, and the cutting blade 120 may all have substantially the same material thickness. Optionally, the cutter head assembly 3000 may also include a fixing frame, through which the rotary blade 100 and the blade net 200 may be fixedly positioned on the support bracket 3000. The cutter head assembly 3000 may also include a carrier, through which the rotary blade 100 and the blade net 200 may first be fixedly positioned within the carrier via the fixing frame, and then mounted on the support bracket 3000 along with the carrier.

[0038] In this embodiment, the shaving unit 1000 may further include a blade foil 200, which serves as the active cutting component of the shaving unit 1000. The blade foil 200 has an axis that substantially coincides with the rotation axis 101 of the rotating blade 100. The blade foil 200 has an annular shaving track 210 arranged around the axis, or in other words, the blade foil 200 has an annular shaving track 210 arranged around the rotation axis 101. The annular shaving track 210 cooperates with a plurality of cutting blades 120 to accommodate at least a portion of the cutting blades 120. The annular shaving track 210 has an outer surface for engaging with the user's skin and an inner surface for engaging with the cutting blade 120. The annular shaving track 210 has a plurality of capture holes 220 penetrating both the inner and outer surfaces. The capture holes 220 gather hair within themselves, allowing it to enter the annular shaving track 210 and participate in the cutting operation. Viewed along a predetermined direction 102, the capture holes 220 have a front wall surface 221 and a rear wall surface 222. The front wall surface 221 has an edge adjacent to the cutting blade 120 and an edge away from the cutting blade 120. A fixed cutting edge 223 is formed on the edge of the front wall surface 221 adjacent to the cutting blade 120. It should be noted that the fixed cutting edge 223 refers to the edge portion of the front wall surface 221 adjacent to the cutting blade 120 that participates in the shearing process. This fixed cutting edge 223 can be the entire edge of the front wall surface 221 adjacent to the cutting blade 120, or it can be only a portion of the edge of the front wall surface 221 adjacent to the cutting blade 120. Figure 5 As shown in the example, the moving cutting edge 121 is the entire front edge of the cutting blade 120 along the predetermined direction 102. When the two ends of the moving cutting edge 121 just come into contact with the edge of the cutting blade 120 adjacent to the front wall surface 221, the part of the edge of the cutting blade 120 adjacent to the front wall surface 221 located between the two ends of the moving cutting edge 121 is the fixed cutting edge 223.

[0039] Among them, such as Figure 5 and Figure 7As shown, during the rotation of the rotating blade 100 around the rotation axis 101, viewed from a perspective parallel to the rotation axis 101, the moving cutting edge 121 gradually approaches the fixed cutting edge 223 along a predetermined direction 102, then contacts the fixed cutting edge 223, and finally separates from it. When the moving cutting edge 121 intersects the fixed cutting edge 223 and undergoes a misalignment, the moving cutting edge 121 and the fixed cutting edge 223 cooperate to cut the hair entering the capture hole 220. Furthermore, within one shearing stroke, the fixed cutting edge 223 and the moving cutting edge 121 enclose a shearing space γ, which gradually shrinks until it disappears, while the shearing angle α continuously changes, for example... Figure 6 and Figure 7 During the process, as the moving cutting edge 121 moves towards the fixed cutting edge 223, the shear angle α continuously changes from α3 to α2 and α1, with α3 > α2 > α1. It should be noted that the shear angle α is formed between the fixed cutting edge 223 and the moving cutting edge 121; in other words, the shear angle α is the angle formed by the tangents of the fixed cutting edge 223 and the moving cutting edge 121 at their intersection point. The shear stroke is the distance traveled by the moving cutting edge 121 and the fixed cutting edge 223 from contact to separation.

[0040] In this way, compared to the discomfort caused by the abrupt change in shear angle α in the shearing scheme of V-shaped fixed cutting edge and V-shaped moving cutting edge, the present disclosure shows that in the shearing stroke of the moving cutting edge 121 and the fixed cutting edge 223, that is, from the process of the two cutting edges coming into contact to the process of separation, the shear angle α changes gradually. The shear angle α does not change abruptly throughout the process, and the change is more gradual. This avoids the sudden pulling sensation caused by the sudden change of the shear angle α, which would cause the shaving to stop. It ensures the consistency of the shaving experience before and after, thereby improving the smoothness of the personal care device and improving the user experience.

[0041] Furthermore, since the shear angle α changes gradually throughout the entire shearing process, there are multiple shear angles α of different values ​​in each shearing segment. In this way, shearing can be achieved from multiple shearing positions in each shearing segment, ensuring that the shearing effect of each adjacent shearing segment is similar and can provide effective shearing throughout the entire shearing process. That is, the entire moving cutting edge 121 and the fixed cutting edge 223 can be effectively sheared, thereby obtaining a larger effective shearing area and improving shearing efficiency.

[0042] Meanwhile, within a shearing stroke, the moving cutting edge 121 and the fixed cutting edge 223 enclose a shearing space γ, and the shearing space γ gradually shrinks until it disappears. Thus, as the shearing space γ gradually shrinks, it can gather the hair, reduce the possibility of the hair being pushed out of the cutting area and causing shearing failure, and further improve the shearing efficiency.

[0043] In order to achieve a gradual change in the shear angle α within the shear stroke, in some embodiments, the orthographic projection of at least one of the fixed cutting edge 223 and the moving cutting edge 121 onto a plane perpendicular to the rotation axis 101 can be a curved shape, thereby utilizing the characteristic that the tangents at each point on the curve are gradually changing to achieve a gradual change in the shear angle α.

[0044] In some embodiments, when the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 is constructed as a curved shape, the middle portion of the fixed cutting edge 223 bulges towards the predetermined direction 102, that is, the fixed cutting edge 223 gradually extends towards the predetermined direction 102 from both ends towards the middle. Furthermore, the curvature of the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 continuously changes. Thus, during the shearing stroke of the moving cutting edge 121 and the fixed cutting edge 223, a gradual change in the shearing angle α can be achieved, and the shearing space γ formed by the moving cutting edge 121 and the fixed cutting edge 223 gradually shrinks as the moving cutting edge 121 moves towards the fixed cutting edge 223, thereby achieving the aforementioned hair gathering effect. Moreover, the gradual change in the shearing angle α allows for a more gentle transition of the front angle of the fixed cutting edge 223 along the predetermined direction 102, effectively releasing skin stress upon contact with the skin, making the hair cutting process less irritating to the skin, thereby improving comfort and safety. Accordingly, in this embodiment, the orthographic projection of the moving cutting edge 121 onto a plane perpendicular to the rotation axis 101 can be constructed as a straight line shape or a curved shape.

[0045] Furthermore, the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 can be constructed as an arc shape, with the opening direction of the arc shape opposite to the predetermined direction 102, thereby facilitating production and reducing production costs. For example, the curvature range of the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 is (0, 3 mm). -1 Preferably, the curvature of the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 is 1.5 mm. -1 .

[0046] Furthermore, the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 can also be constructed as a multi-segment structure. Specifically, such as... Figure 8As shown, the orthographic projection of the fixed cutting edge 223 on a plane perpendicular to the rotation axis 101 may have a first intermediate section 2231, and a first edge section 2232 and a second edge section 2233 located at both ends of the first intermediate section 2231. Along the predetermined direction 102, the first intermediate section 2231 is located in front of the first edge section 2232 and the second edge section 2233. The curvature of the first edge section 2232 and the curvature of the second edge section 2233 are both less than the curvature of the first intermediate section 2231, so that the curvature at both ends of the fixed cutting edge 223 is relatively gentle compared to the curvature in the middle. This allows the hair to be gathered towards the middle during the cutting process, while avoiding gathering most of the hair in the middle for cutting. This also allows both ends of the fixed cutting edge 223 to participate in effective cutting, improving cutting efficiency.

[0047] For example, the curvature of the first edge segment 2232, the curvature of the second edge segment 2233, and the curvature of the first intermediate segment 2231 range from (0, 3mm) to (3mm). -1 Preferably, the curvature of the first edge segment 2232 and the curvature of the second edge segment 2233 are (0, 1.5 mm). -1 The curvature range of the first intermediate segment 2231 is (0.5mm). -1 3mm -1 ].

[0048] In some embodiments, when the orthographic projection of the movable cutting edge 121 onto a plane perpendicular to the rotation axis 101 is constructed as a curve, the middle portion of the movable cutting edge 121 bulges in the direction opposite to the predetermined direction 102. That is, the movable cutting edge 121 gradually extends from both ends toward the middle in the direction opposite to the predetermined direction 102. Thus, during the shearing stroke between the movable cutting edge 121 and the fixed cutting edge 223, a gradual change in the shearing angle α can be achieved, and the shearing space γ enclosed by the movable cutting edge 121 toward the fixed cutting edge 223 can gradually shrink as the movable cutting edge 121 moves toward the fixed cutting edge 223, thereby achieving the aforementioned hair-gathering effect. Correspondingly, in this embodiment, the orthographic projection of the fixed cutting edge 223 onto a plane perpendicular to the rotation axis 101 can be constructed as a straight line or a curve.

[0049] Furthermore, the orthographic projection of the moving cutting edge 121 onto a plane perpendicular to the rotation axis 101 can be constructed as an arc shape, with the opening direction of the arc shape being the same as the predetermined direction 102, thereby facilitating production and reducing production costs. For example, the curvature range of the orthographic projection of the moving cutting edge 121 onto a plane perpendicular to the rotation axis 101 is (0.5mm). -1 1.5mm -1 ].

[0050] Furthermore, the orthographic projection of the moving cutting edge 121 onto at least the plane perpendicular to the rotation axis 101 can also be constructed as a multi-segment structure. Specifically, such as... Figure 9 As shown, the orthographic projection of the moving cutting edge 121 on a plane perpendicular to the rotation axis 101 may have a second intermediate section 1211, and a third edge section 1212 and a fourth edge section 1213 located at both ends of the second intermediate section 1211. Along the predetermined direction 102, the second intermediate section 1211 is located behind the third edge section 1212 and the fourth edge section 1213. The curvature of the third edge section 1212 and the curvature of the fourth edge section 1213 are both less than the curvature of the second intermediate section 1211. This makes the curvature at both ends of the orthographic projection of the moving cutting edge 121 on the plane perpendicular to the rotation axis 101 more gradual than that in the middle. This allows the hair to be gathered towards the middle during the cutting process, while avoiding gathering most of the hair in the middle for cutting. This also allows both ends of the moving cutting edge 121 to participate in effective cutting, improving cutting efficiency.

[0051] For example, the curvature of the third edge segment 1212, the curvature of the fourth edge segment 1213, and the curvature of the second intermediate segment 1211 range from (0, 3 mm) -1 The first intermediate segment 2231 and the second intermediate segment 1211 can be set correspondingly, the third edge segment 1212 can be set correspondingly to the first edge segment 2232, and the fourth edge segment 1213 and the second edge segment 2233 can be set correspondingly.

[0052] It should be pointed out that, such as Figure 8 As shown, when the orthographic projections of the moving cutting edge 121 and the fixed cutting edge 223 on the plane perpendicular to the rotation axis 101 are both constructed as curved shapes, the moving cutting edge 121 and the fixed cutting edge 223 can form an interlocking cutting method, which can further enhance the effect of gathering the beard, while ensuring the effective cutting area and improving shaving efficiency.

[0053] Regarding the specific structure of the blade mesh 200, in some embodiments, such as Figure 4 , Figure 10 and Figure 11As shown, the blade mesh 200 is generally cap-shaped. Specifically, the blade mesh 200 may include a top cover 230 and an annular wall 240. Of course, the top cover 230 may also be a shape other than a circle, such as a polygon. The annular wall 240 extends at least partially from the periphery of the top cover 230 along the rotation axis 101 toward the rotating blade 100. For example, the annular wall 240 may include a main body portion 241 and a flange portion 242. The main body portion 241 extends directionally from the top cover 230 along the rotation axis 101 toward the rotating blade 100, and the flange portion 242 extends radially outward from the periphery of the main body portion 241 away from the top cover 230. Of course, a transition section that bends radially outward may also be provided between the main body portion 241 and the flange portion 242, and the main body portion 241 is connected to the flange portion 242 through the transition section.

[0054] The top cover 230 includes a central base 231 and at least one of the aforementioned annular shaving tracks 210. The central base 231 is located at the center of the top cover 230 and serves as a central support portion of the top cover 230 and also acts as a shield for the interior of the shaving unit 1000. Each annular shaving track 210 is arranged around the central base 231 and has an inner circumferential side surface 211 and an outer circumferential side surface 212. The capture holes 220 located on the annular shaving tracks 210 extend at least partially onto the inner circumferential side surface 211 and the outer circumferential side surface 212, thereby increasing the probability of hair entering the capture holes 220, improving the gathering effect of the capture holes 220 on the beard, and improving cleaning efficiency.

[0055] The annular shaving track 210 may have one or more, and correspondingly, a number of cutting blades 120 are arranged according to the number of annular shaving tracks 210.

[0056] Taking two annular shaving tracks 210 as an example, the two annular shaving tracks 210 are a first shaving track 213 and a second shaving track 214. The first shaving track 213 is located between the second shaving track 214 and the intermediate base 231. The capture hole 220 of the first shaving track 213 extends to the outer circumferential side surface 212 of the first shaving track 213. The capture hole 220 of the second shaving track 214 extends to the inner circumferential side surface 211 and the outer circumferential side surface 212 of the second shaving track 214.

[0057] Correspondingly, such as Figure 12 As shown, a plurality of cutting blades 120 are arranged in an inner blade group 122 and an outer blade group 123 coaxially around a rotation axis 101. The inner blade group 122 is located inside the outer blade group 123. The inner blade group 122 cooperates with the first shaving track 213 to achieve hair cutting, and the outer blade group 123 cooperates with the second shaving track 214 to achieve hair cutting.

[0058] For example, the number of cutting blades 120 in the inner blade group 122 is less than the number of cutting blades 120 in the outer blade group 123. For instance, the number of cutting blades 120 in the inner blade group 122 is five, and the number of cutting blades 120 in the outer blade group 123 is ten, thereby ensuring that the first shaving track 213 cooperating with the inner blade group 122 and the second shaving track 214 cooperating with the outer blade group 123 have similar hair cutting effects.

[0059] like Figure 4 and Figure 5 As shown, the capture hole 220 can be considered as being formed by dividing two adjacent ribs 215 on the annular shaving track 210. Specifically, the annular shaving track 210 is provided with a plurality of ribs 215, which are spaced apart along a predetermined direction 102. In other words, the two ends of the ribs 215 respectively overlap the inner circumferential side surface 211 and the outer circumferential side surface 212, and the capture hole 220 is located between two adjacent ribs 215. It can be understood that each rib 215 has a bottom wall near the cutting blade 120, a top wall opposite to the bottom wall, a front side wall and a rear side wall connecting the top wall and the bottom wall, wherein the front side wall is located in front of the rear side wall along the predetermined direction 102. The aforementioned front wall surface 221 is the rear side wall of the front rib 215 among the two ribs 215 forming the capture hole 220, and the rear wall surface 222 is the front side wall of the rear rib 215 among the two ribs 215 forming the capture hole 220.

[0060] For example, several ribs 215 can be equidistantly spaced along a predetermined direction 102 to ensure that the size and shape of each capture hole 220 are uniform, thus ensuring aesthetics and hair cutting effect.

[0061] In some embodiments, the front wall surface 221 has a rounded corner at the edge away from the cutting blade 120, or the rear side wall and top wall of the rib 215 have a rounded corner with a radius of 0.05mm-0.15mm. This makes the foil 200 smoother when it comes into contact with the skin, effectively reducing friction and scratching of the foil 200 on the skin during shaving, reducing skin irritation, and making the shaving experience more comfortable.

[0062] In some embodiments, the rear wall 222 is configured as a curved surface, with the rear wall 222 bulging toward a predetermined direction 102. The front wall 221 and the rear wall 222 can have approximately the same shape, so that the width of each part of the capture hole 220 is nearly consistent, which can obtain a larger capture hole 220, ensure the hair capture rate, and improve the cutting efficiency.

[0063] At least one of the front wall surface 221 and the rear wall surface 222 may also have a certain draft angle to facilitate mold production.

[0064] In some embodiments, the side of the rib 215 adjacent to the cutting blade 120 bulges away from the cutting blade 120 in the middle of the radial direction of the annular shaving track 210. In other words, the bottom wall of the rib 215 bulges away from the cutting blade 120. The thickness of the rib 215 gradually decreases from both ends in the radial direction perpendicular to the rotation axis 101, forming a dome or curved shape that is thin in the middle and thick at both sides. This ensures the connection strength between the rib 215 and the inner circumferential side surface 211 and the outer circumferential side surface 212, and also minimizes the distance between the cutting blade 120 and the outer surface of the blade net 200. This allows the moving cutting edge 121 and the fixed cutting edge 223 to be as close as possible to the root of the hair, reducing hair residue after cutting and improving shaving cleanliness.

[0065] Correspondingly, the fixed cutting edge 223 also bulges away from the cutting blade 120, and the middle portion of the moving cutting edge 121 bulges away from the cutting blade 120, thus forming a shape that matches the side of the rib 215 adjacent to the cutting blade 120. This allows the moving cutting edge 121 and the fixed cutting edge 223 to fit together, and the moving cutting edge 121 to be closer to the hair root, further improving the cleanliness of the shave. It should be noted that when the moving cutting edge 121 and the fixed cutting edge 223 bulge away from the cutting blade 120, and the orthographic projection of the moving cutting edge 121 and the fixed cutting edge 223 onto the plane perpendicular to the rotation axis 101 is also a curve, the moving cutting edge 121 and the fixed cutting edge 223 are spatial curves.

[0066] In some embodiments, the side of the rib 215 away from the cutting blade 120 may be a plane, or the side of the rib 215 away from the cutting blade 120 may be raised in a direction away from the cutting blade 120.

[0067] In some embodiments, such as Figure 2 and Figure 10 As shown, the center of the cutter head 110 may be provided with a coupling feature so that the cutter head 110 is connected to the transmission element in the housing through the coupling feature, so that the power transmitted by the transmission element can be transmitted to the cutter head 110 to drive the cutter head 110 to rotate.

[0068] The coupling feature can be a connecting hole or a mating shaft. Taking a connecting hole as an example, the cutter head 110 can be connected to the mating shaft 130 through the connecting hole. The mating shaft 130 has a positioning hole at its top end and a connecting part at its bottom end. The connecting part is used to connect with the transmission element inside the housing to transmit power. Correspondingly, the inner surface of the intermediate base 231 is provided with a positioning shaft 2311. The positioning shaft 2311 is used to cooperate with the positioning hole to ensure the accuracy of the relative position of the rotating blade 100 and the blade net 200 after assembly, thus ensuring the shearing effect.

[0069] The terms "upper" and "lower" used in this disclosure are used to describe the relative positional relationship of the various structures in the accompanying drawings. They are only for the purpose of clarity of description and are not intended to limit the scope of implementation of this disclosure. Changes or adjustments to the relative relationships without substantially altering the technical content should also be considered as part of the scope of implementation of this disclosure.

[0070] It should be noted that, in this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] Furthermore, in this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A blade foil for a shaving unit, characterized in that, The blade net (200) has an axis; The blade net (200) has an annular shaving track (210) arranged around the axis to facilitate cooperation with a rotating blade. The rotating blade rotates in a predetermined direction (102). The annular shaving track (210) has a plurality of capture holes (220), and the capture holes (220) have a front wall surface (221) and a rear wall surface (222) when viewed along the predetermined direction (102). The front wall surface (221) has a fixed cutting edge (223) formed at the edge adjacent to the inner surface of the annular shaving track (210). The fixed cutting edge (223) is constructed as a curved shape at least in the orthographic projection on a plane perpendicular to the axis, and the middle portion of the fixed cutting edge (223) bulges toward the predetermined direction (102).

2. The blade foil according to claim 1, characterized in that, The curvature of the orthographic projection of the fixed cutting edge (223) onto a plane perpendicular to the axis continuously changes.

3. The blade mesh according to claim 1, characterized in that, The fixed cutting edge (223) is constructed as an arc shape.

4. The blade foil according to claim 1, characterized in that, The orthographic projection of the fixed cutting edge (223) onto a plane perpendicular to the axis has a first intermediate segment (2231), and a first edge segment (2232) and a second edge segment (2233) located at both ends of the first intermediate segment (2231), wherein, Along the predetermined direction (102), the first intermediate segment (2231) is located in front of the first edge segment (2232) and the second edge segment (2233), and the curvature of the first edge segment (2232) and the curvature of the second edge segment (2233) are both less than the curvature of the first intermediate segment (2231).

5. The blade mesh according to claim 4, characterized in that, The curvature of the first edge segment (2232) and the curvature of the second edge segment (2233) range from (0, 1.5 mm) to (1.5 mm). -1 The curvature range of the first intermediate segment (2231) is (0.5mm). -1 2.5mm -1 ].

6. The blade mesh according to claim 4, characterized in that, The curvature of the first edge segment (2232), the curvature of the second edge segment (2233), and the curvature of the first intermediate segment (2231) range from (0, 3 mm) to (3 mm). -1 ].

7. The blade foil according to any one of claims 1 to 6, characterized in that, The blade mesh (200) includes a top cover (230) and an annular wall (240), wherein, The annular wall (240) extends at least partially from the periphery of the top cover (230) along the axial direction; The top cover (230) includes a central base (231) and at least one of the annular shaving tracks (210) disposed around the central base (231) and having an inner circumferential side surface (211) and an outer circumferential side surface (212), and the capture hole (220) extends at least partially to the inner circumferential side surface (211) and / or the outer circumferential side surface (212).

8. The blade mesh according to claim 7, characterized in that, The annular shaving track (210) has two parts, namely the first shaving track (213) and the second shaving track (214); The first shaving track (213) is located between the second shaving track (214) and the intermediate base (231). The capture hole (220) of the first shaving track (213) extends to the outer circumferential side surface (212) of the first shaving track (213), and the capture hole (220) of the second shaving track (214) extends to the outer circumferential side surface (212) and the inner circumferential side surface (211) of the second shaving track (214).

9. The blade mesh according to claim 1, characterized in that, The front wall surface (221) has a rounded corner at the edge adjacent to the outer surface of the annular shaving track (210), and the rounded corner is 0.05mm-0.15mm.

10. The blade mesh according to claim 1, characterized in that, The front wall surface (221) and the rear wall surface (222) have approximately the same shape.

11. The blade mesh according to claim 1, characterized in that, The annular shaving track (210) is provided with a plurality of ribs (215), which are spaced apart along the predetermined direction (102). The capture hole (220) is located between two adjacent ribs (215). The bottom wall of the rib (215) protrudes from the middle part of the radial direction of the annular shaving track (210) toward the outer surface of the annular shaving track (210).

12. A head structure, characterized in that, The head structure includes a supporting base shell (2000), a supporting bracket (3000), and at least one shaving unit (1000), wherein, The support bracket (3000) is detachably connected to the support base shell (2000); The shaving unit (1000) includes a rotating blade (100) and a blade net (200) as described in any one of claims 1 to 11, wherein the rotating blade (100) is located within the blade net (200) and the blade net (200) is disposed on the support bracket (3000).

13. A personal care device, characterized in that, The personal care device includes a base structure (4000) and a head structure coupled to the base structure (4000), wherein, The base structure (4000) houses a drive component and a drive output component, the drive output component being coupled to the drive component; The head structure includes a supporting base shell (2000), a supporting bracket (3000), and a shaving unit (1000). The supporting base shell (2000) is coupled to the base structure (4000), and the supporting bracket (3000) is detachably connected to the supporting base shell (2000). The shaving unit (1000) includes a rotating blade (100) and a blade net (200) as described in any one of claims 1 to 11. The rotating blade (100) is located inside the blade net (200) and can rotate relative to the blade net (200). The blade net (200) is disposed on the supporting bracket (3000), and the rotating blade (100) is tractively connected to and driven by the drive output member.

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