Cutter head assembly and reciprocating type shaver

Abstract

The utility model relates to a tool bit assembly and a reciprocating type shaver, and is applied to the field of shavers. The cutter comprises a moving cutter and a cutter net, the moving cutter can reciprocate in the first direction, the moving cutter comprises a plurality of blade single bodies arranged at intervals in the first direction, and each blade single body is provided with a cutting edge face; the cutter net is provided with a plurality of net holes which are distributed at intervals in the first direction, a barrier rib is formed between every two adjacent net holes, a cutter net inner face is formed on the side, facing the movable cutter, of each barrier rib, and the cutter net inner faces can make contact with the cutting edge face; the cutting edge face is provided with a movable cutter receding groove, and the edge of the movable cutter receding groove and the edge of the blade single body are spaced. And / or the inner surface of the cutter net is provided with a cutter net clearance groove, and the edge of the cutter net clearance groove is spaced from the edge of the mesh. The receding groove is formed in at least one of the cutting edge face of the movable cutter and the cutter net inner face of the cutter net, the contact face of the cutter net inner face and the cutting edge face of the movable cutter can be effectively reduced, friction between the cutter net inner face and the movable cutter can be reduced, and then noise and current generated by the cutter head assembly in the shaving process are reduced.

Description

Blade assembly and reciprocating shaver Technical Field

[0001] This application relates to the technical field of razors, and in particular to a razor head assembly and a reciprocating razor. Background Technology

[0002] Reciprocating electric shavers are tools that use moving blades to cut beards or other body hair that enter the mesh of the shaver. They are common self-service small household appliances that not only meet the need for shaving, but also the need for high efficiency and comfort.

[0003] In related technologies, the head assembly of a reciprocating electric shaver includes a foil and moving blades. The foil, as a key component close to the skin, is typically designed as a curved, thin sheet with fine mesh openings. Its function is to guide the beard hairs into the mesh openings so that the moving blades can cut them. The moving blades are the core component that achieves the beard-cutting function. They consist of multiple sharp blades that reciprocate at high frequency under the drive of a motor to remove hair.

[0004] During shaving, to ensure a clean and thorough shave, the blade edge of the moving part must maintain close contact and fit snugly against the inner surface of the foil to completely cut the beard. However, when the moving part performs high-frequency reciprocating motion, friction is generated between the blade edge and the inner surface of the foil. This friction not only accelerates the wear and tear on the foil and moving part but also generates significant operating resistance, affecting the shaving effect. Summary of the Invention

[0005] Therefore, it is necessary to provide a shaver head assembly and a reciprocating shaver to address the problem that friction occurs between the moving blade edge and the inner surface of the foil during shaving, which affects the lifespan of the shaver head and the shaving effect.

[0006] In a first aspect, this application provides a cutter head assembly, which adopts the following technical solution:

[0007] A blade assembly includes at least a movable blade and a blade mesh. The movable blade is configured to reciprocate along a first direction. Along the first direction, the movable blade includes a plurality of spaced-apart blade units, each blade unit having a cutting edge for cutting hair. The blade mesh has a plurality of mesh openings spaced-apart along the first direction, with a grid rib formed between adjacent mesh openings. An inner surface of the blade mesh is formed on the side of the grid rib facing the movable blade. Viewed along the first direction, the inner surface of the blade mesh has the same curvature as the cutting edge and can contact the cutting edge. The cutting edge has at least one movable blade clearance groove extending along a second direction, which intersects the first direction. In the first direction, the edge of the movable blade clearance groove is spaced from the edge of the blade unit. And / or, the inner surface of the blade mesh has at least one blade mesh clearance groove extending along the second direction, with the edge of the blade mesh clearance groove spaced from the edge of the mesh opening in the first direction.

[0008] In one embodiment, along the first direction, a movable cutting edge is formed at at least one edge of the blade unit, the movable cutting edge being used to cut hair.

[0009] In one embodiment, the blade unit has an arc segment and two straight segments, the arc segment being integrally formed between the two straight segments, and the moving cutting edge being formed on at least one side of the arc segment along the first direction.

[0010] In one embodiment, at least one side of the arcuate segment is provided with a groove extending in a second direction, the edge of the groove coinciding with the edge of the cutting edge surface to form the moving cutting edge.

[0011] In one embodiment, all of the moving blade clearance slots are spaced apart along the first direction; or, all of the moving blade clearance slots are spaced apart along the second direction.

[0012] In one embodiment, the spacing between any two adjacent moving blade clearance slots is equal.

[0013] In one embodiment, all of the moving blade clearance grooves are arranged in an array on the cutting edge surface.

[0014] In one embodiment, all of the blade mesh clearance slots are spaced apart along the first direction; or, all of the blade mesh clearance slots are spaced apart along the second direction.

[0015] In one embodiment, all of the blade mesh clearance slots are arranged in an array on the inner surface of the blade mesh.

[0016] Secondly, this application provides a reciprocating razor, which adopts the following technical solution:

[0017] A reciprocating shaver includes a body, a drive unit, and the aforementioned blade assembly. The drive unit is installed inside the body, and the moving blade is driven by the drive unit and can reciprocate along a first direction under the drive unit's influence.

[0018] The aforementioned shaver head assembly, by creating clearance grooves on at least one of the cutting edge surface of the moving blade and the inner surface of the foil, effectively reduces the contact area between the inner surface of the foil and the cutting edge surface of the moving blade, thereby reducing friction and consequently decreasing noise and current generated by the shaver head assembly during shaving. The reduced noise significantly improves the shaving experience, while the reduced current extends the shaver's battery life. Furthermore, the clearance grooves facilitate easier grinding of the moving blade's cutting edge surface, optimizing the manufacturing process. Attached Figure Description

[0019] Figure 1 is a partial cross-sectional view of the moving blade and the blade mesh in one embodiment of this application.

[0020] Figure 2 is a perspective view of the moving blade in one embodiment of this application.

[0021] Figure 3 is a perspective view of a single blade unit in one embodiment of this application.

[0022] Figure 4 is a top view of a blade unit in one embodiment of this application.

[0023] Figure 5 is a bottom view of a blade unit in one embodiment of this application.

[0024] Figure 6 is a top view of a blade unit in another embodiment of this application.

[0025] Figure 7 is a top view of the blade unit in another embodiment of this application.

[0026] Figure 8 is a top view of the blade unit in another embodiment of this application.

[0027] Figure 9 is a cross-sectional schematic diagram of the blade unit shown in Figure 6.

[0028] Figure 10 is a cross-sectional schematic diagram of the grating ribs in one embodiment of this application.

[0029] Figure 11 is a cross-sectional schematic diagram of the grid ribs in another embodiment of this application.

[0030] Attached image annotations:

[0031] 1. Moving blade; 11. Cutting section; 111. Single blade; 1111. Moving blade edge; 1112. Edge face; 1113. Moving blade clearance groove; 1114. Groove; 12. Connecting part; 2. Blade mesh; 21. Spacing rib; 211. Skin-friendly surface; 212. Inner surface of the blade mesh; 213. Blade mesh clearance groove; 22. Mesh opening; 3. Arc-shaped segment; 4. Straight segment; F1. First direction; F2. Second direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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 mechanical connection or an electrical connection; 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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 that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. If a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation. The "first direction" can be the direction of movement of the cutting tool.

[0038] The embodiments of this application will be further described in detail below with reference to Figures 1-11.

[0039] Referring to Figure 1, Figure 1 shows a partial cross-sectional view of the moving blade and the foil in one embodiment of this application. One embodiment of this application provides a shaver head assembly, specifically a shaver head assembly for a reciprocating shaver, which includes at least a moving blade 1 and a foil 2. The foil 2 covers the periphery of the moving blade 1 and is used to contact the skin. The bottom end of the moving blade 1 is used for transmission connection to a drive component. During shaving, the moving blade 1 can reciprocate along a first direction F1 (the left-right direction shown in Figure 1) under the drive component to complete the shaving operation. In this embodiment, the drive component can specifically be a drive motor.

[0040] In this embodiment, the blade mesh 2 is made of stainless steel. Compared with the blade mesh made of nickel in the traditional technology, the blade mesh 2 made of stainless steel has a better structural strength than the blade mesh made of pure nickel, which makes the blade assembly have stronger structural stability and wear resistance, thereby extending the service life of the blade assembly.

[0041] In addition, many people are allergic to nickel. When nickel comes into contact with the skin, it easily releases nickel ions, which can trigger allergic reactions. Stainless steel is much more hypoallergenic than nickel. Due to its alloying properties and the dense oxide film formed on its surface, nickel ions in stainless steel are not easily released, which greatly reduces the risk of allergies to the human body and thus improves the user experience.

[0042] Continuing to refer to FIG. 1, the top of the moving blade 1 has a cutting edge surface 1112 for cutting hair. Along the up-down direction shown in FIG. 1, the cutter net 2 includes a skin-friendly surface 211 and an inner surface 212 of the cutter net disposed opposite to each other. Among them, the inner surface 212 of the cutter net is located on the side of the cutter net 2 facing the moving blade 1 and can contact the cutting edge surface 1112 of the moving blade 1 during the movement of the moving blade 1, and the skin-friendly surface 211 is used to contact the skin to prevent the skin from being accidentally scratched during shaving.

[0043] Combined with FIGS. 2 and 3, FIG. 2 shows a three-dimensional view of the moving blade in an embodiment of the present application, and FIG. 3 shows a three-dimensional view of a single cutting edge in an embodiment of the present application. In some embodiments, the moving blade 1 includes a plurality of single cutting edges 111 arranged at intervals along the first direction F.sub.1, and the cutting edge surface 1112 is formed on the side of the single cutting edge 111 close to the cutter net 2 for cutting hair.

[0044] Continuing to refer to FIG. 3, in some embodiments, the single cutting edge 111 has an arc segment 3 and two straight segments 4. The arc segment 3 is integrally formed between the two straight segments 4 to form a single cutting edge 111 having an overall "U" shape. Among them, the outer surface of the arc segment 3 is the above-mentioned cutting edge surface 1112, and the outer edge radian of the arc segment 3 is consistent with the radian of the inner surface 212 of the cutter net to ensure effective contact between the two during shaving.

[0045] It can be understood that in some other embodiments, the single cutting edge 111 can also be constructed into a structure approximately similar to a "ㄇ" shape, as long as the outer edge radian of its arc segment 3 is consistent with the radian of the inner surface 212 of the cutter net, and the present application does not limit this.

[0046] Combined with FIGS. 3 and 4, FIG. 4 shows a top view of the single cutting edge in an embodiment of the present application. Along the first direction F.sub.1, a moving blade cutting edge 1111 is formed at the edge position of at least one side of the single cutting edge 111, that is, the moving blade cutting edge 1111 is formed on at least one side of the above-mentioned arc segment 3. Preferably, moving blade cutting edges 1111 are formed on both sides of the arc segment 3 opposite to each other in the first direction F.sub.1 to improve shaving efficiency and ensure shaving effect.

[0047] It can be understood that in order to ensure the shaving effect, the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the cutter net 2 must contact each other during shaving to achieve the cutting operation of hair. During shaving, there will be sliding friction between the moving blade 1 and the cutter net 2. The greater the frictional force, the greater the resistance to the movement of the moving blade 1, and the more work is done to overcome the resistance, resulting in an increase in current. At the same power, the smaller the current, the faster the rotational speed of the driving member for driving the moving blade 1, and the faster the moving speed of the moving blade 1, thereby improving shaving efficiency.

[0048] Therefore, in order to reduce the friction between the inner surface 212 of the blade net and the cutting edge surface 1112 during the movement of the moving blade 1, this application provides a clearance groove on at least one of the inner surface 212 of the blade net and the cutting edge surface 1112 to reduce the contact area between the two, thereby achieving the purpose of reducing friction.

[0049] In some embodiments, the cutting edge surface 1112 of the moving blade 1 is provided with a moving blade clearance groove 1113 to reduce the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the foil, thereby reducing the friction between them and thus reducing the noise and current generated by the shaver head assembly during shaving. The reduction in noise significantly improves the shaving experience, while the reduction in current extends the shaver's battery life. In addition, the moving blade clearance groove 1113 also makes the grinding of the cutting edge surface 1112 of the moving blade 1 easier, optimizing the manufacturing process.

[0050] In this embodiment, the edge of the movable blade clearance groove 1113 is spaced apart from the movable blade edge 1111, so that the movable blade edge 1111 is always located at the highest point of the movable blade 1, so as to ensure effective contact between the movable blade 1 and the inner surface 212 of the blade net during movement, improve shaving sharpness, and thus ensure shaving effect.

[0051] Referring to Figures 1 and 5, Figure 5 shows a bottom view of the blade unit in one embodiment of this application. Specifically, at least one side of the blade unit 111 has a groove 1114 extending along the second direction F2. The edge of the groove 1114 coincides with the edge of the cutting edge surface 1112 to form the aforementioned moving blade edge 1111. In this embodiment, the groove 1114 provides sufficient space for the whiskers on both sides of the blade unit 111 to be guided in. Furthermore, as shown in Figure 1, the edge of the groove 1114 of the moving blade 1 coincides with the edge of the cutting edge surface 1112. The cutting edge surface 1112 is planar and contacts the inner surface 212 of the blade net, causing the end of the moving blade edge 1111 to form a pointed structure. When the moving blade 1 reciprocates at high speed along the first direction F1, it will not obstruct the whiskers from entering the gap between the moving blade edge 1111 and the blade net 2, nor will it cause fraying, thus effectively improving the user experience.

[0052] Furthermore, as shown in this application, the groove 1114 on the moving blade 1 overlaps with the edge of the cutting edge 1112 to form a moving blade cutting edge 1111. When the hair enters the blade net 2, it is cut, which increases the effective cutting length of the blade unit 111, improves the cutting efficiency, and also improves the shaving efficiency of the razor, saving the user's shaving time.

[0053] Referring to Figure 6, which shows a top view of a blade unit according to another embodiment of this application. In some other embodiments, each blade unit 111 has a plurality of moving blade clearance grooves 1113 on its cutting edge surface 1112. All moving blade clearance grooves 1113 are spaced apart along a first direction F1, and each moving blade clearance groove 1113 is constructed as an elongated groove extending along a second direction F2 to reduce the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the blade net. The second direction F2 intersects the first direction F1, and preferably the second direction F2 is perpendicular to the first direction F1 to ensure shaving sharpness. The moving blade clearance grooves 1113 are preferably equidistantly distributed along the first direction F1.

[0054] Referring to Figure 7, which shows a top view of a blade unit in another embodiment of this application, in some other embodiments, each blade unit 111 has a plurality of moving blade clearance grooves 1113 on its cutting edge surface 1112, and all moving blade clearance grooves 1113 are spaced apart along the second direction F2. Similarly, all moving blade clearance grooves 1113 are constructed as elongated grooves extending along the second direction F2, thereby reducing the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the blade net while ensuring the sharpness of the moving blade 1. The second direction F2 intersects the first direction F1, and preferably the second direction F2 is perpendicular to the first direction F1 to ensure shaving sharpness. The moving blade clearance grooves 1113 are preferably equidistantly distributed along the second direction F2.

[0055] Referring to Figure 8, which shows a top view of a single blade unit in another embodiment of this application. In some embodiments, each blade unit 111 has a plurality of moving blade clearance grooves 1113 on its cutting edge surface 1112. The moving blade clearance grooves 1113 are arranged in an array on the cutting edge surface 1112 to reduce the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the blade net.

[0056] In this embodiment, a portion of the moving blade clearance groove 1113 can be constructed as a long strip according to actual needs, while the remaining portion can be constructed as a circle. This application does not limit the shape of the moving blade clearance groove 1113, as long as it can reduce the contact area between the cutting edge surface 1112 and the inner surface 212 of the blade net while ensuring the sharpness of the moving blade 1, thereby reducing the friction between the moving blade 1 and the blade net 2.

[0057] Referring to Figure 9, which shows a cross-sectional view of the blade unit in Figure 6, D is the distance from the moving blade edge 1111 to the moving blade clearance groove 1113, E is the depth of the moving blade clearance groove 1113, and F is the width of the moving blade clearance groove 1113.

[0058] In this embodiment of the application, the value range of D is set to 0.05mm-0.22mm, preferably 0.10mm-0.15mm. The smaller the value of D, the worse the strength of the moving blade edge 1111. The larger the value of D, the greater the friction between the inner surface 212 of the blade net and the surface 1112 of the moving blade edge 1111.

[0059] Furthermore, in this application, the value range of E is set to 0.005mm-0.08mm, preferably 0.005mm-0.03mm. The larger the value of E, the weaker the strength of the moving blade edge 1111; the smaller the value of E, the weaker the ability of the moving blade clearance groove 1113 to reduce friction. The value range of F is set to 0.03mm-0.33mm, preferably 0.04mm-0.10mm. The larger the value of F, the weaker the strength of the moving blade edge 1111, and the greater the risk of pulling on the beard during shaving; the smaller the value of F, the higher the requirements for the etching process.

[0060] Referring to Figures 1 and 10, Figure 10 shows a cross-sectional schematic diagram of the grid ribs in one embodiment of this application. In some embodiments, the blade mesh 2 has a plurality of mesh openings 22 spaced apart along a first direction F1, and a grid rib 21 for contacting the skin is formed between adjacent mesh openings 22. The side of the grid rib 21 facing the moving blade 1 is the inner surface 212 of the blade mesh, and the side of the grid rib 21 away from the moving blade 1 is the skin-friendly surface 211.

[0061] Specifically, the inner surface 212 of the mesh rib 21 has a mesh clearance groove 213. The edge of the mesh clearance groove 213 is spaced from the edge of the mesh opening 22, so that the mesh clearance groove 213 is always located in the middle position of the mesh rib 21. This ensures effective contact between the moving blade 1 and the cutting edge surface 1112 during the movement of the blade, thereby ensuring shaving sharpness and shaving effect. Along the first direction F1, the mesh clearance grooves 213 are preferably evenly distributed.

[0062] Taking Figure 10 as an example, in Figure 10, B is the distance from the edge of the mesh 22 of the blade mesh 2 on the inner surface 212 to the edge of the blade mesh clearance groove 213, and C is the depth of the blade mesh clearance groove 213. In this embodiment, the value range of B is set to 0.02mm-0.10mm, preferably 0.04mm-0.06mm. The smaller the value of B, the weaker the strength of the blade mesh 2; the larger the value of B, the greater the friction between the inner surface 212 of the blade mesh and the moving blade edge 1111 surface 1112. The value range of C is set to 0.002mm-0.03mm, preferably 0.002mm-0.015mm. The larger the value of C, the weaker the strength of the blade mesh 2; the smaller the value of C, the weaker the ability of the blade mesh clearance groove 213 to reduce friction.

[0063] Referring to Figure 11, which shows a cross-sectional schematic diagram of the grid ribs in another embodiment of this application, in some other embodiments, each grid rib 21 has multiple blade mesh clearance grooves 213. All blade mesh clearance grooves 213 are spaced apart along a first direction F1, and each blade mesh clearance groove 213 is constructed as an elongated groove extending along a second direction F2 to reduce the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the blade mesh. In this embodiment of the application, the second direction F2 intersects the first direction F1, and preferably the second direction F2 is perpendicular to the first direction F1 to ensure shaving sharpness. Along the second direction F2, the blade mesh clearance grooves 213 are preferably evenly distributed.

[0064] In some other embodiments, each shaving rib 21 has multiple blade-net clearance grooves 213 on its inner surface 212, and all the blade-net clearance grooves 213 are distributed at intervals along the second direction F2 (not shown). Similarly, all the blade-net clearance grooves 213 are constructed as elongated grooves extending along the second direction F2, thereby reducing the contact area between the cutting edge surface 1112 of the moving blade 1 and the inner surface 212 of the blade net while ensuring the sharpness of the moving blade 1. The second direction F2 intersects the first direction F1, and preferably the second direction F2 is perpendicular to the first direction F1 to ensure shaving sharpness.

[0065] In other embodiments, each grid rib 21 has multiple blade clearance grooves 213 on its inner surface 212. These grooves are arranged in an array (not shown) to reduce the contact area between the cutting edge 1112 of the moving blade 1 and the inner surface 212 of the blade net. In this embodiment, some of the blade clearance grooves 213 can be constructed as elongated strips, while the remaining grooves can be constructed as circles. This application does not limit the shape of the blade clearance grooves 213, as long as they can reduce the contact area between the cutting edge 1112 of the moving blade 1 and the inner surface 212 of the blade net while ensuring the sharpness of the moving blade 1, thereby reducing the friction between the moving blade 1 and the blade net 2.

[0066] Referring again to Figure 1, in some embodiments, this application also provides a reciprocating shaver, which includes at least a body (not shown), a drive unit (not shown), and a shaving head assembly as shown in any of the above embodiments. The drive unit is installed inside the body, and the moving blade 1 is drivenly connected to the output end of the drive unit, thereby performing high-frequency reciprocating motion along a first direction F1 under the drive unit's influence to achieve the shaving operation. In this embodiment, the drive unit may specifically be a drive motor.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cutter head assembly, characterized in that, The blade assembly includes at least: a movable blade configured to reciprocate along a first direction, wherein the movable blade includes a plurality of spaced-apart blade units, each blade unit having a cutting edge surface for cutting hair; and a blade mesh having a plurality of mesh openings spaced-apart along the first direction, with a grid rib formed between adjacent mesh openings, and an inner surface of the blade mesh formed on the side of the grid rib facing the movable blade, wherein, when viewed along the first direction, the inner surface of the blade mesh has the same curvature as the cutting edge surface and can contact the cutting edge surface; wherein the cutting edge surface has at least one movable blade clearance groove, the movable blade clearance groove extending along a second direction intersecting the first direction; in the first direction, the edge of the movable blade clearance groove is spaced from the edge of the blade unit; and / or, the inner surface of the blade mesh has at least one blade mesh clearance groove, the blade mesh clearance groove extending along the second direction, and in the first direction, the edge of the blade mesh clearance groove is spaced from the edge of the mesh opening.

2. The cutter head assembly according to claim 1, characterized in that, Along the first direction, a movable cutting edge is formed at at least one edge of the blade unit, and the movable cutting edge is used to cut hair.

3. The cutter head assembly according to claim 2, characterized in that, The blade unit has an arc-shaped segment and two straight segments. The arc-shaped segment is integrally formed between the two straight segments. Along the first direction, the moving blade edge is formed on at least one side of the arc-shaped segment.

4. The cutter head assembly according to claim 3, characterized in that, At least one side of the arc-shaped segment is provided with a groove extending in a second direction, the edge of the groove coinciding with the edge of the cutting edge surface to form the moving cutting edge.

5. The cutter head assembly according to any one of claims 1-4, characterized in that, All of the moving blade clearance slots are spaced apart along the first direction; or, all of the moving blade clearance slots are spaced apart along the second direction.

6. The cutter head assembly according to claim 5, characterized in that, The spacing between any two adjacent moving cutter clearance slots is equal.

7. The cutter head assembly according to any one of claims 1-4, characterized in that, All of the moving blade clearance grooves are arranged in an array on the cutting edge surface.

8. The cutter head assembly according to any one of claims 1-4, characterized in that, All of the blade mesh clearance slots are spaced apart along the first direction; or, all of the blade mesh clearance slots are spaced apart along the second direction.

9. The cutter head assembly according to any one of claims 1-4, characterized in that, All of the aforementioned cutter mesh clearance slots are arranged in an array on the inner surface of the cutter mesh.

10. A reciprocating razor, characterized in that, It includes a body, a drive unit, and a cutter head assembly as described in any one of claims 1-9, wherein the drive unit is installed inside the body, the moving cutter is connected to the drive unit, and is capable of reciprocating along the first direction under the drive unit.

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