Shaver head and rotary electric shaver

Abstract

The utility model discloses a shaver head and a rotary electric shaver. The shaver head comprises a blade net, a rotating blade and a cover. The knife net comprises a mounting cavity defined by a shearing part; the bottom of the installation cavity is provided with an installation hole extending towards the interior of the knife net. The rotary blade rotates relative to the knife net; the cover and the rotary blade are located on the opposite side of the blade net, and the cover comprises a cover body and a connecting column connected with the cover body. At least one of the connecting column and the inner wall of the mounting hole is provided with a protrusion. The connecting columns are inserted into the mounting holes so that the protrusions can be located in the mounting holes, and at least the connecting columns are bonded with the inner walls of the mounting holes through glue. And the cover body covers the mounting cavity. Therefore, the contact area of glue is increased through the protrusions, after the glue is solidified, connection between the cover and the knife net becomes very stable, the cover is not prone to falling off, and the decoration effect can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of razors, and particularly to a razor head and a rotary electric razor. Background Art

[0002] A rotary electric razor includes a cutter net and a cover. The cutter net includes an installation cavity surrounded by a shearing part. The cover is installed in the installation cavity to cover the installation cavity, and can play a decorative role, for example.

[0003] During actual shaving, the cover is subjected to repeated frictional forces from the skin, resulting in the cover falling off. In addition, during the cleaning process of the razor, the flushing and corrosion of water flow will also increase the risk of the cover falling off. These problems not only reduce the service life of the razor, but also affect the shaving experience of users. Summary of the Utility Model

[0004] The purpose of this application is to disclose a razor head and a rotary electric razor. The cover of the razor head is not easily detached.

[0005] In a first aspect, this application discloses a razor head. The razor head includes a cutter net, a rotary blade and a cover, wherein: the cutter net includes an installation cavity surrounded by a shearing part; an installation hole extending towards the inside of the cutter net is arranged at the bottom of the installation cavity; the rotary blade rotates relative to the cutter net; the cover and the rotary blade are located on the opposite sides of the cutter net, and the cover includes a cover body and a connecting column connected to the cover body; at least one of the connecting column and the inner wall of the installation hole is provided with a protrusion; the connecting column is inserted into the installation hole so that the protrusion is located in the installation hole, and the connecting column and the inner wall of the installation hole are bonded with glue; the cover body covers the installation cavity.

[0006] In some embodiments, the protrusion extends around the circumference of the connecting column for one week.

[0007] In some embodiments, between the connecting column and the inner wall of the installation hole, and between the cover body and the bottom of the installation cavity, the glue at least fills the space between the connecting column and the inner wall of the installation hole.

[0008] In some embodiments, there are multiple protrusions, which are arranged at intervals along the height direction of the connecting column.

[0009] In some embodiments, the cross-section of the protrusion is in an arcuate shape, the cross-section is parallel to the height direction of the connecting column, or the cross-section of the protrusion includes an inclined side and an arc side, the inclined side is inclined to the height direction of the connecting column; the arc side is connected to the inclined side and is located above the inclined side; the cross-section is parallel to the height direction of the connecting column.

[0010] In some embodiments, along a direction perpendicular to the height of the connecting post, the height of the protrusion is h1, where 0.05 mm ≤ h1 ≤ 0.8 mm; along the height direction of the connecting post, the width of the protrusion is w1, where 0.5 mm ≤ w1 ≤ 1.5 mm.

[0011] In some embodiments, the cover body includes a fence surrounding the contour edge of the cover body; the fence contacts the bottom edge of the installation cavity.

[0012] In some embodiments, the height of the fence relative to the cover body is h2, where 0 mm < h2 ≤ 0.08 mm, and the width of the fence is w2, where 0.5 mm ≤ w2 ≤ 1 mm.

[0013] In some embodiments, the cover body includes an outer surface opposite to the connecting post, the outer surface is a spherical crown, and the highest point of the outer surface is located on the rotation axis of the rotary blade and is not lower than the shearing toroidal surface at the top of the shearing portion.

[0014] In some embodiments, the height difference between the highest point and the shearing toroidal surface is ΔH, where 0 mm ≤ ΔH ≤ 0.3 mm.

[0015] In some embodiments, the material of the lid is composite polymer plastic or metal.

[0016] In some embodiments, the rotary blade is located inside the cutter net and is rotatably connected to a rotating shaft inside the cutter net, and the rotating shaft has the installation hole; the blade of the rotary blade is located below the shearing toroidal surface of the shearing portion.

[0017] In a second aspect, the present application discloses a rotary electric shaver. The rotary electric shaver includes any one of the foregoing shaver heads.

[0018] For the shaver head or the rotary electric shaver, since at least one of the connecting post and the inner wall of the installation hole is provided with a protrusion, the protrusion increases the contact area. Therefore, when the connecting post and the inner wall of the installation hole are bonded with glue, the contact area of the glue is larger. After the glue is cured, the connection between the lid and the cutter net will become very stable, improving the stability of the lid installation and preventing the lid from falling off. For example, a larger contact area results in a stronger adhesive force, and the lid will not fall off due to a weak adhesive force between the lid and the cutter net; nor will it fall off due to the scouring and corrosion of water flow. Furthermore, by providing the protrusion and assembling the connecting post into the installation hole with the protrusion located inside the installation hole, the requirements for the installation process can be reduced on the premise of ensuring that the lid and the cutter net are not easily separated. Finally, the lid covers the installation cavity (and also covers the installation hole), playing a good role in appearance decoration and making the shaver head more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of a razor blade head shown according to an embodiment of the present application. The razor blade head includes a first type of lid;

[0020] Figure 2 It is a cross-sectional view of an assembly formed by the first type of lid and the blade net, with no glue shown;

[0021] Figure 3 It is Figure 2 an enlarged view of part A in

[0022] Figure 4 a cross-sectional view of the first type of lid;

[0023] Figure 5 It is Figure 4 an enlarged view of part B in

[0024] Figure 6 It is Figure 4 an enlarged view of part C in

[0025] Figure 7 a cross-sectional view of the second type of lid;

[0026] Figure 8 It is Figure 7 an enlarged view of part D in

[0027] Figure 9 a schematic diagram of the blade net and the lid with a height difference ΔH = 0;

[0028] Figure 10 It is Figure 9 a schematic diagram of the contact between the skin and the lid and the blade net in the case of the shown height difference ΔH = 0;

[0029] Figure 11 a schematic diagram of the blade net and the lid with a height difference ΔH > 0;

[0030] Figure 12 It is Figure 11 a schematic diagram of the contact between the skin and the lid and the blade net in the case of the shown height difference ΔH > 0;

[0031] Figure 13 a schematic diagram of the blade net and the lid with a height difference ΔH < 0;

[0032] Figure 14 It is Figure 13 a schematic diagram of the contact between the skin and the lid and the blade net in the case of the shown height difference ΔH < 0. Detailed implementation manners

[0033] Here, in conjunction with the accompanying drawings, the technical solutions in the embodiments (or "embodiments") of the present application will be clearly and completely described. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0034] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), then such terms are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0035] See Figure 1 and Figure 2 and in conjunction with Figure 4 and Figure 7 , the present application discloses a razor blade head. The razor blade head includes a blade net 1, a rotary blade 2, and a lid 3. The blade net 1 includes an installation cavity 12 surrounded by a shearing portion 11. An installation hole 13 extending towards the inside of the blade net 1 is provided at the bottom of the installation cavity 12.

[0036] The rotary blade 2 rotates relative to the blade net 1. In this way, when the rotary blade 2 is driven to rotate relative to the blade net 1, the shaving function is achieved. The lid 3 and the rotary blade 2 are located on the opposite sides of the blade net 1. Taking Figure 1 as a reference, the lid 3 is located on the upper side of the blade net 1, and the rotary blade 2 is located on the lower side of the blade net 1, and the upper side and the lower side are opposite.

[0037] See Figure 4 and in conjunction with Figure 3 and Figure 5 , Figure 4 shows a first lid 3. See Figure 7 and in conjunction with Figure 7 , Figure 7 shows a second lid. These two lids 3 include a lid body 31 and a connecting column 32 connected to the lid body 31, and the difference lies in the number and structure of the protrusions 33 on the connecting column 32. In the embodiments of the present application, the connecting column 32 is provided with protrusions 33. In some other embodiments, the protrusions 33 are provided on the inner wall of the installation hole 13. In still some other embodiments, both the inner wall of the installation hole 13 and the connecting column 32 are provided with protrusions 33. In short, at least one of the inner wall of the connecting column 32 and the inner wall of the installation hole 13 is provided with protrusions 33. See Figure 2 and in conjunction withFigure 3 The connecting post 32 is inserted into the mounting hole 13 so that the protrusion 33 is located within the mounting hole 13. At least the connecting post 32 and the inner wall of the mounting hole 13 are bonded by glue 4, that is: a) only the connecting post 32 and the inner wall of the mounting hole 13 are bonded by glue; 2) not only the connecting post 32 and the inner wall of the mounting hole 13 are bonded by glue, but also the lid 31 and the bottom of the mounting cavity 12 are wholly or partly bonded by glue. The lid 31 covers the mounting cavity 12. The lid 3 can serve a decorative function.

[0038] With the above arrangement, since at least one of the connecting post 32 and the inner wall of the mounting hole 13 is provided with a protrusion 33, the protrusion 33 increases the contact area. Thus, when the connecting post 32 and the inner wall of the mounting hole 13 are bonded by glue 4, the contact area of the glue 4 is larger. After the glue 4 cures, the connection between the lid 3 and the cutter net 1 will become very firm, improving the stability of the installation of the lid 3 and preventing the lid 3 from falling off. For example, a larger contact area results in a stronger adhesive force, and the lid 3 will not fall off due to a weak adhesive force between the lid 3 and the cutter net 1; nor will it fall off due to the scouring and corrosion of water flow.

[0039] Furthermore, by means of the assembly method of providing the protrusion 33, inserting the connecting post 32 into the mounting hole 13 and having the protrusion 33 located within the mounting hole 13, on the premise of ensuring that the lid 3 and the cutter net 1 are not easily separated, the requirements for the installation process can be reduced. For example, glue 4 is applied to the connecting post 32 and then inserted into the mounting hole 13 to complete the installation. Moreover, during the installation process, the extrusion between the connecting post 32 and the inner wall of the mounting hole 13 (including the protrusion 33) makes the glue 4 evenly distributed, etc., which can improve the stability and prevent the lid 3 from falling off. Thus, the requirements for the installation process are low.

[0040] Finally, the lid covers the mounting cavity (and also covers the mounting hole), serving a good appearance decoration function, making the shaver cutter head more beautiful.

[0041] Based on the above functions of the protrusion 33, the structure of the protrusion is not limited. For example, when protrusions 33 are provided on both the connecting post 32 and the inner wall of the mounting hole 13, the protrusion 33 can be a thread; of course, it is not limited to a thread. The following describes an implementation manner of the protrusion 33:

[0042] In some implementation manners, the protrusion 33 extends one week along the circumferential direction of the connecting post 32. When the protrusion 33 is provided on the connecting post 32, the protrusion 33 winds around the outer surface of the connecting post 32 for one week; in the case where the protrusion 33 is provided on the inner wall of the mounting hole 13, the protrusion 33 extends one week along the inner wall, that is, winds around the connecting post 32 for one week.

[0043] With the above settings, since the protrusion 33 extends around the circumference of the connecting post 32, the contact area between the connecting post 32 and the inner wall of the mounting hole 13 is larger, the glue bonding is more stable, and it is more capable of preventing the lid 3 from falling off.

[0044] In some embodiments, the glue 4 at least fills the space between the connecting post 32 and the inner wall of the mounting hole 13, including the following two cases: a) The glue 4 only fills the space between the connecting post 32 and the inner wall of the mounting hole 13; b) Refer to Figure 3 and combine with Figure 2 , the glue 4 not only fills the space between the connecting post 32 and the inner wall of the mounting hole 13, but also fills the space between the lid body 31 and the bottom of the mounting cavity 12.

[0045] With the above settings, since the glue 4 at least fills the space between the connecting post 32 and the inner wall of the mounting hole 13, in this way, the glue bonding is more stable, and it is more capable of preventing the lid 3 from falling off.

[0046] Refer to Figure 3 , Figure 4 and Figure 5 , in some embodiments, there are multiple protrusions 33, which are arranged at intervals along the height direction of the connecting post 32. Of course, in this embodiment, the shape of the protrusion 33 is not limited to Figures 3 to 5 the shape shown. In some other embodiments, refer to Figure 7 and Figure 8 , there may also be only one protrusion 33.

[0047] With the above settings, whether there is one or multiple protrusions 33, it can increase the contact area, improve the stability of the lid 3, and prevent the lid 3 from falling off. Of course, when there are multiple and spaced protrusions 33, the connecting post 32 forms a structure with alternating concave and convex distributions in the height direction, the contact area is larger, and it is more capable of improving the stability of the lid 3 and preventing the lid 3 from falling off.

[0048] Refer to Figure 8 and combine with Figure 7 , the cross-section of the protrusion 33 is bow-shaped, and overall, the protrusion 33 is a convex hull. The cross-section is parallel to the height direction of the connecting post 32. Refer to Figure 5 and combine with Figure 3 and Figure 4 , the cross-section of the protrusion 33 includes an inclined side 331 and an arc side 332. The cross-section is parallel to the height direction of the connecting post 32. The arc side 332 is connected to the inclined side 331 and is located above the inclined side 331. Figure 5 and Figure 4 and as well as Figure 8 and Figure 7Although the figure shows the shape obtained by providing the protrusion 33 on the connecting column 32. Those skilled in the art can understand that when the protrusion 33 is provided on the inner wall of the mounting hole 13, the cross-sectional shape thereof can also be the aforementioned shape.

[0049] With the above settings, the cross-section of the protrusion 33 is bow-shaped, or the protrusion 33 includes a hypotenuse 331 and an arc edge 332, which can increase the contact area, facilitate the flow of glue, and further improve the stability of the lid 3 and prevent the lid 3 from falling off.

[0050] See Figure 5 and in combination with Figure 4 and Figure 3 and Figure 8 and in combination with Figure 7 along the direction perpendicular to the height of the connecting column 32, the height of the protrusion 33 is h1, where 0.05 mm ≤ h1 ≤ 0.8 mm. For example, 0.05 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.18 mm, 0.2 mm, 0.23 mm, 0.25 mm, 0.28 mm, 0.3 mm, 0.33 mm, 0.38 mm, 0.4 mm, 0.43 mm, 0.48 mm, 0.5 mm, 0.52 mm, 0.55 mm, 0.58 mm, 0.6 m, 0.65 mm, 0.68 mm, 0.7 mm, 0.73 mm, 0.75 mm or 0.8 mm. Along the height direction of the connecting column 32, the width of the protrusion 33 is w1, where 0.5 mm ≤ w1 ≤ 1.5 mm. For example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, etc.

[0051] With the above settings, since 0.05 mm ≤ h1 ≤ 0.8 mm and 0.5 mm ≤ w1 ≤ 1.5 mm, it can increase the contact area, facilitate the flow of glue, and further improve the stability of the lid 3 and prevent the lid 3 from falling off.

[0052] For any of the aforementioned lids 3 (such as Figure 4 the first lid 3 shown in Figure 7 and the second lid 3 shown in Figure 2 ), the lid body 31 includes a fence 34 that surrounds the contour edge of the lid body 31 for one week. See

[0053] With the above settings, since the enclosure 34 surrounds the contour edge of the cover body 31 for one week and contacts the bottom edge of the installation cavity 12, it plays a blocking role and can effectively prevent excess glue from overflowing from the installation hole 13 to the edge of the cover 3 (for example, between the cover body 31 and the side wall of the installation cavity 12) during the process of inserting the connecting column 32 of the cover 3 into the installation hole 13, which affects the appearance of the product.

[0054] See Figure 6 , the height of the enclosure 34 relative to the cover body 31 is h2, 0 mm < h2 ≤ 0.08 mm. For example, 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm or 0.08 mm, etc.; the width of the enclosure 34 is w2, 0.5 mm ≤ w2 ≤ 1 mm.

[0055] With the above settings, since 0 mm < h2 ≤ 0.08 mm and 0.5 mm ≤ w2 ≤ 1 mm, the enclosure 34 can play a better blocking role and can effectively prevent excess glue from overflowing to the edge of the cover 3 (for example, between the cover body 31 and the side wall of the installation cavity 12) during the process of inserting the connecting column 32 of the cover 3 into the installation hole 13, which affects the appearance of the product.

[0056] For any of the above-mentioned covers 3, see Figure 4 and Figure 2 the first cover 3 shown in Figure 7 and the second cover 3 shown in

[0057] With the above settings, since the outer surface 311 is a spherical crown. The highest point of the outer surface 311 is located on the rotation axis of the rotary blade 2 and is not lower than the shearing ring surface 111 at the top of the shearing part of the cutter net 1. That is, the height difference between the highest point and the shearing ring surface 111 is ΔH, ΔH ≥ 0.

[0058] By means of Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14The relationship between the above height difference and comfort is understood as follows:

[0059] In Figure 9 , the height difference ΔH between the outer surface 311 of the lid 3 and the shearing annular surface 111 of the cutter net 1 is 0, that is, the highest point of the lid 3 is flush with the shearing annular surface 111 of the cutter net 1. In Figure 10 , the skin 5 does not deform at the highest point of the outer surface 311, avoiding the head wave phenomenon generated by the shearing annular surface 111 and the skin, reducing the moving friction resistance between the shearing annular surface 111 and the skin. Therefore, there is no grinding feeling of skin deformation, generating a relatively comfortable shaving skin feeling, improving the moving smoothness of shaving, and avoiding the discomfort of the skin during shaving (including grinding feeling and sticky feeling) caused by the design of the cutter net 1, bringing a better shaving experience to the user.

[0060] In Figure 11 , the height difference ΔH between the highest point of the lid 3 and the shearing annular surface 111 of the cutter net 1 is >0. In Figure 12 , the skin 5 does not undergo spherical deformation at the outer surface 311 of the lid 3 (for example, the skin naturally stretches at the top of the outer surface 311), which can further reduce the head wave phenomenon generated by the shearing annular surface 111 and the skin 5, reducing the moving friction resistance between the shearing annular surface 111 and the skin 5, thereby improving the moving smoothness of shaving, bringing a comfortable shaving skin feeling and a better shaving experience to the user.

[0061] Compare Figure 9 , Figure 10 , Figure 11 and Figure 12 with Figure 13 and Figure 14 . In Figure 13 , the outer surface 311 of the lid 3 is concave with respect to the cutter net 1 (i.e., ΔH < 0), and this height difference will bring about a poor skin feeling. The reason for this poor skin feeling (as shown in Figure 14 ) is mainly the concave skin deformation of the facial skin 5, resulting in a large plowing friction force during shaving, thus generating a grinding feeling and an uncomfortable shaving skin feeling.

[0062] See Figure 2 . The height difference between the highest point and the shearing annular surface 111 is ΔH, and 0mm ≤ ΔH ≤ 0.3mm.

[0063] With the above settings, since 0mm ≤ ΔH ≤ 0.3mm, the setting of this height difference can effectively reduce the head wave phenomenon generated by the shearing annular surface 111 of the razor blade during movement and the skin, reducing the moving friction resistance between the shearing annular surface 111 and the skin, thereby improving the moving smoothness of shaving and bringing a better shaving experience to the user.

[0064] In some embodiments, the material of the lid is composite polymer plastic or metal. With the above arrangement, it is also convenient to apply a smooth coating, and a better skin feel can be obtained.

[0065] For any of the foregoing razor blades, refer to Figure 1 and in combination with Figure 2 , the rotary blade 2 is located within the cutter net 1 and is rotatably connected to a rotating shaft 15 inside the cutter net 1. More specifically, the cutter net 1 includes a receiving cavity 14, and a rotating shaft 15 is formed by the extension of the top wall of the receiving cavity 14. The rotating shaft 15 has the mounting hole 13. The rotary blade 2 is provided with a pivot hole 21 that cooperates with the rotating shaft 15. The blade 22 of the rotary blade 2 is located below the shearing toroidal surface 111 of the shearing portion. Thus, when the rotary blade 2 is driven, the rotary blade 2 rotates around the rotating shaft 15.

[0066] With the above arrangement, the rotating shaft 15 has the mounting hole 13, and the rotating shaft 15 cooperates with the pivot hole 21. In this way, the mounting hole 13 can be regarded as the shaft hole of the cutter net 1, and the shaft hole is blocked by the lid 3, so that the lid 3 has a better decorative effect and improves the aesthetics of the product. Moreover, combined with the foregoing beneficial effects, the lid 3 is not easily detached, or the razor blade can improve the shaving comfort.

[0067] In a second aspect, an embodiment of the present application discloses a rotary electric shaver. The rotary electric shaver includes any of the foregoing razor blades.

[0068] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A razor head, characterized in that: The razor head comprises a blade net, a rotating blade and a cover, wherein: The knife net includes an installation cavity surrounded by a shearing portion; a mounting hole extending toward the inside of the knife net is provided at the bottom of the installation cavity; The rotary blade rotates relative to the blade net; The cover and the rotating blade are located on opposite sides of the knife net, and include a cover body and a connecting column connected to the cover body; at least one of the connecting column and the inner wall of the mounting hole is provided with a protrusion; the connecting column is inserted into the mounting hole so that the protrusion is located in the mounting hole, and at least the connecting column and the inner wall of the mounting hole are bonded by glue; the cover body covers the mounting cavity.

2. The razor head according to claim 1, characterized in that: The protrusion extends along the circumference of the connecting column for one circle; And / or, the glue at least fills the space between the connecting column and the inner wall of the mounting hole, and between the cover body and the bottom of the mounting cavity.

3. The razor head according to claim 1, characterized in that: There are a plurality of protrusions, which are arranged at intervals along the height direction of the connecting column.

4. The razor head according to claim 1, characterized in that: The cross section of the protrusion is arcuate, and the cross section is parallel to the height direction of the connecting column; Alternatively, the cross section of the protrusion includes a hypotenuse and an arcuate side, the hypotenuse is inclined to the height direction of the connecting column; the arcuate side is connected to the hypotenuse and is located above the hypotenuse; and the cross section is parallel to the height direction of the connecting column.

5. The razor head according to claim 1, characterized in that: Along the direction perpendicular to the height of the connecting column, the height of the protrusion is h1, 0.05mm≤h1≤0.8mm; Along the height direction of the connecting column, the width of the protrusion is w1, 0.5mm≤w1≤1.5mm.

6. The razor head according to claim 1, characterized in that: The cover body includes a surrounding wall surrounding the contour edge of the cover body; the surrounding wall is in contact with the bottom edge of the installation cavity.

7. The razor head according to claim 6, characterized in that: The height of the surrounding wall relative to the cover body is h2, 0mm<h2≤0.08mm, and the width of the surrounding wall is w2, 0.5mm≤w2≤1mm.

8. The razor head according to claim 1, characterized in that: The cover body comprises an outer surface opposite to the connecting column, the outer surface is a spherical cap, and the highest point of the outer surface is located on the rotating axis of the rotating blade and is not lower than the shearing annular surface at the top of the shearing portion.

9. The razor head according to claim 8, characterized in that: A height difference between the highest point and the shear ring surface is ΔH, 0mm≤ΔH≤0.3mm.

10. The razor head according to claim 1, characterized in that: The cover is made of composite polymer plastic or metal.

11. The razor head according to claim 1, characterized in that: The rotating blade is located in the knife net and is rotatably connected to a rotating shaft inside the knife net, wherein the rotating shaft has the mounting hole; and the blade of the rotating blade is located below the shearing annular surface of the shearing portion.

12. A rotary electric shaver, characterized in that: The rotary electric shaver comprises the shaver head according to any one of claims 1 to 11.

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