CN215790015U - Ceramic razor blade, cutting unit, razor head and electric razor - Google Patents

Abstract

The application provides a pottery razor blade, the cutting unit, razor head and electric shaver, pottery razor blade is including cutting the dish, it includes blade disc and pottery razor blade to cut the dish, the pottery razor blade is located on the blade disc, the one end that the blade disc was kept away from to the pottery razor blade has the cutting face, a side of cutting face has the cutting edge, the cutting edge has the curve section, the curve section is the curve form that the orientation of middle part orientation cutting face opposite side is sunken to be set up, the cutting face is the convex arcwall face of blade disc orientation is kept away from to the middle part orientation. The utility model provides a ceramic razor blade through set up inside sunken curve section on ceramic razor blade's cutting edge, when cutting hair, can guide hair to the middle part position of curve section to when the cutting face rotates along shaving the track, can play automatic positioning's effect, in order better with the orbital interior surface cooperation cutting hair that shaves, promote the efficiency of shaving, promote user experience.

Description

Ceramic razor blade, cutting unit, razor head and electric razor

Technical Field

The application belongs to the technical field of electric shavers, and more specifically relates to a ceramic shaver blade, a cutting unit, a shaver head and an electric shaver.

Background

The cutting surfaces of current electric shavers using ceramic razor blades are generally flat or beveled, as are the shaving tracks in the corresponding foil. When shaving or trimming hair, when the cutting face of the ceramic shaver blade rotates and cuts in the shaving track of the shaver net, beards or hair easily slide to two sides of the cutting face from the middle of the cutting face, so that the beards or the hair cannot be cut during shaving, the shaving efficiency is low, and the use experience effect is not good.

SUMMERY OF THE UTILITY MODEL

An object of the embodiments of the present application is to provide a ceramic razor blade, a cutting unit, a shaving head and an electric razor, so as to solve the problem that when the ceramic razor blade in the prior art is used for shaving, beard or hair easily slips to both sides of a cutting surface from the middle of the cutting surface, resulting in low shaving efficiency.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: the utility model provides a ceramic razor blade, includes the cutting dish, the cutting dish includes blade disc and ceramic blade, the ceramic blade is located on the blade disc, the ceramic blade is kept away from the one end of blade disc has the cutting face, a side of cutting face has the cutting edge, the cutting edge has the curve section, the curve section is the middle part orientation the curve form of the sunken setting of direction of cutting face opposite side, the cutting face is kept away from for the middle part orientation the convex arcwall face of blade disc direction.

In an alternative embodiment, the curved section is located in the middle of the cutting edge.

In an optional embodiment, orthographic projections of parts of the cutting edge at two ends of the curved section on the cutter head are straight line sections.

In an alternative embodiment, the ceramic insert has a side surface intersecting the cutting face to form the cutting edge, and the cutting face and the side surface form an angle of less than 90 degrees in the circumferential direction of the cutter head.

In an alternative embodiment, the side surface has an inwardly recessed inner support surface therein that intersects the cutting face at the curvilinear segment.

In an alternative embodiment, the angle between the inner support surface and the cutting surface decreases from the middle of the curved section to the end of the curved section.

In an alternative embodiment, the angle between the inner support surface and the cutting surface is in the range of 45-68 degrees.

In an alternative embodiment, the width of the cutting edge along the radial direction of the cutter head ranges from 0.7mm to 2 mm.

In an alternative embodiment, the width of the cutting edge along the radial direction of the cutter head ranges from 0.8 mm to 1.5 mm.

In an alternative embodiment, the central portion of the cutting face protrudes to a height in the range of 0.02-0.2mm relative to the side edges of the cutting face.

In an alternative embodiment, the central portion of the cutting face protrudes to a height in the range of 0.03-0.08mm relative to the side edges of the cutting face.

In an alternative embodiment, the thickness of the cutter head ranges from 1mm to 3 mm.

In an alternative embodiment, the thickness of the cutter head ranges from 1.5mm to 2.5 mm.

In an alternative embodiment, the cutting disk is an integrally formed structure made of a ceramic material.

Another objective of an embodiment of the present invention is to provide a cutting unit, which includes a blade mesh, the blade mesh has a shaving track, the shaving track is provided with an inlet suitable for allowing hairs to enter the blade mesh, and the cutting unit further includes a ceramic razor blade according to any of the above embodiments, the blade mesh is covered on the ceramic razor blade, and a cutting surface of the ceramic razor blade is in adaptive abutment with an inner surface of the shaving track.

It is another object of an embodiment of the present application to provide a shaving head, comprising a housing, and further comprising a cutting unit according to the above-mentioned embodiment, said cutting unit being mounted on said housing.

It is a further object of an embodiment of the present invention to provide an electric shaver comprising a handle and a shaving head as in the previous embodiments, the housing of the shaving head being mounted on the handle.

The beneficial effect that ceramic razor blade, cutting unit, razor head and electric shaver that this application embodiment provided lies in: compared with the prior art, the ceramic razor blade of this application through set up inside sunken curve section on the cutting edge at ceramic razor blade, when shaving or cutting hair, can guide hair to the middle part position of curve section to better cut off hair, hair or beard can not be to the cutting edge both sides slipperiness, promote the efficiency of shaving, promote user experience. The cutting surface is set to be an arc-shaped surface with a convex middle part, and the inner surface of the shaving track of the corresponding cutter net is also an arc-shaped surface, so that the cutting surface can play a role of automatic positioning when rotating along the shaving track, so that hairs can be better cut by matching with the inner surface of the shaving track, and the shaving efficiency is improved. The cutting unit, the shaver head and the electric shaver which use the ceramic shaver blade have high cutting efficiency and good user experience.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electric shaver according to an embodiment of the present application;

fig. 2 is an exploded view of a cutting unit according to an embodiment of the present disclosure;

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

FIG. 4 is a schematic perspective view of the cutting disk of FIG. 2;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic top view of a cutting disk according to an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is an enlarged view of portion D of FIG. 7;

fig. 9 is a schematic top view of a cutting unit according to an embodiment of the present disclosure;

FIG. 10 is an enlarged view of section E of FIG. 9;

FIG. 11 is a schematic cross-sectional view taken along line F-F of FIG. 9;

FIG. 12 is a schematic cross-sectional view of the knife net of FIG. 9;

fig. 13 is a schematic perspective view of the knife net in fig. 9.

Wherein, in the drawings, the reference numerals are mainly as follows:

100-an electric shaver;

10-a shaving head; 11-a housing;

20-a cutting unit;

21-knife net; 211-a shaving track; 2111-inlet; 2112-inner surface; 212-positioning the shaft;

22-ceramic razor blades; 23-a cutting disk; 231-a cutter head; 232-ceramic blade; 2321-cutting surface; 2322-side surface; 23221-inner support surface; 2323-knife edge; 23231-curved section; 23232-edge segment; 24-a fixed seat; 241-positioning grooves;

30-handle.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present application, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1, an electric shaver 100 according to an embodiment of the present invention includes a handle 30 and a shaver head 10, wherein the shaver head 10 is mounted on the handle 30, and the shaver head 10 is supported by the handle 30.

Referring to fig. 1, a shaving head 10 includes a housing 11 and a cutting unit 20. The cutting unit 20 is mounted on the housing 11, and particularly may be mounted on the top of the housing 11, for cutting hair.

Referring to fig. 2, the cutting unit 20 includes a cutter net 21 and a ceramic razor blade 22, and the cutter net 21 covers the ceramic razor blade 22 to cut hairs by the ceramic razor blade 22 in cooperation with the cutter net 21. In use, the ceramic razor blade 22 is mounted in the foil 21, and the ceramic razor blade 22 is rotated in the foil 21, so that the ceramic razor blade 22 cooperates with the foil 21 to cut hair. The blade net 21 is installed on the top of the cabinet 11 to support and position the blade net 21 through the cabinet 11.

Referring to fig. 2, 4 and 5, the ceramic razor blade 22 provided by the present application will now be described. The ceramic razor blade 22 includes a cutting disc 23, the cutting disc 23 includes a cutter disc 231 and a ceramic blade 232, and the ceramic blade 232 is disposed on the cutter disc 231 to support the ceramic blade 232 through the cutter disc 231. One end of the ceramic blade 232 has a cutting face 2321, the cutting face 2321 is located on the end face of the end of the ceramic blade 232 away from the cutter head 231, and one side of the cutting face 2321 has a cutting edge 2323 for cutting. The ceramic blade 232 is used, has high hardness and wear resistance, and can ensure that the cutting edge 2323 on the ceramic blade 232 is not easily passivated and rusted, so that the service life is prolonged and the shaving efficiency is improved.

Referring to fig. 10, 11 and 13, the foil 21 has a shaving track 211, and an inlet 2111 is opened on the shaving track 211. The cutting face 2321 of the ceramic shaving blade 22 is adapted to abut against the inner surface of the shaving track 211. In use, hair enters the foil 21 from the inlets 2111 in the foil 21 to be severed by the ceramic shaving blades 22 in cooperation with the inner surfaces 2112 of the shaving tracks 211.

Referring to fig. 5 and 10, the cutting edge 2323 has a curved section 23231, and the curved section 23231 is curved in a concave manner toward the other side of the cutting surface 2321, that is, the middle of the curved section 23231 is concave inward. When the structure is used for cutting hair, the hair can be guided to the middle position of the cutting edge 2323, so that the hair can be cut off better, and the shaving efficiency is improved; and can gather the cut hairs to be better guided toward the cutter head 231 for discharging the cut hairs.

Referring to fig. 11 and 12, when the cutting surface 2321 is an arc-shaped surface, the inner surface 2112 of the corresponding shaving track 211 is also an arc-shaped surface, i.e., the inner surface 2112 of the shaving track 211 is an arc-shaped surface with a central portion depressed upward, so that the cutting surface 2321 is matched with the inner surface 2112 of the shaving track 211. Thus, the cutting surface 2321 can perform an automatic positioning function when rotating along the shaving track 211, so that the cutting surface 2321 and the inner surface 2112 of the shaving track 211 can better cooperate to cut hairs, and the shaving efficiency is improved.

The application provides a ceramic razor blade 22, compare with prior art, the ceramic razor blade 22 of this application, through set up inside sunken curve section 23231 on the cutting edge 2323 at ceramic blade 232, when shaving or cutting hair, can guide the hair to the middle part position of curve section 23231 to better cut off the hair, hair or beard can not be to cutting edge 2323 both sides swift current, promote shaving efficiency, promote user experience. The cutting surface 2321 is configured as an arc-shaped surface with a convex middle portion, and the inner surface 2112 of the shaving track 211 of the corresponding blade net 21 is also an arc-shaped surface, so that when the cutting surface 2321 rotates along the shaving track 211, an automatic positioning function can be achieved, hairs can be better cut by matching with the inner surface 2112 of the shaving track 211, and the shaving efficiency is improved. The cutting unit 20, the shaver head 10 and the electric shaver 100 using the ceramic razor blade 22 have high cutting efficiency and good user experience.

In one embodiment, the ceramic razor blade 22 further comprises a fixing seat 24, the cutting disc 23 is mounted on the fixing seat 24, the cutting disc 23 is supported by the fixing seat 24, and when in use, the fixing seat 24 can be connected to a driving mechanism of the electric razor 100 to drive the fixing seat 24 to rotate, so as to drive the cutting disc 23 to rotate. Of course, in some embodiments, the cutting disc 23 may be directly connected to the driving mechanism of the electric shaver 100 according to the shape of the cutting disc 23, for example, a joint hole may be provided in the cutting disc 23 to connect to the driving mechanism of the electric shaver 100.

In one embodiment, referring to fig. 3 and 5, the curved segment 23231 can be curved to allow the hair to be cut better and to facilitate design and manufacture. In other embodiments, the curved segment 23231 may be configured in other shapes, such as parabolic, V-shaped, and the like.

In one embodiment, the curved segment 23231 is located in the middle of the cutting edge 2323 to ensure good structural strength across the cutting edge 2323. In other embodiments, the cutting edge 2323 may be integrally formed as the curved segment 23231, i.e., the cutting edge 2323 is integrally curved, such that the cutting edge 2323 has a larger curved cutting area.

In one embodiment, the portion of the cutting edge 2323 at both ends of the curved segment 23231 is formed as a straight line segment in the orthographic projection of the cutter head 231, that is, the cutting edge 2323 has edge segments 23232 at both ends of the curved segment 23231, and the orthographic projection of the edge segment 23232 on the cutter head 231 is a straight line segment, so that the ceramic blade 232 is not easily cracked or broken during the grinding process. In addition, the structure can provide the ceramic razor blade 232 with good structural strength, and is not prone to chipping or crumbling when the ceramic razor blade 22 falls.

In one embodiment, the holder 24 may be made of plastic, which is low cost and light weight.

In one embodiment, the fixing seat 24 and the cutting disc 23 may be formed by two-step injection molding, for example, when the fixing seat 24 is injection molded, the cutting disc 23 may be placed in a mold for forming the fixing seat 24, and when the fixing seat 24 is injection molded, the fixing seat 24 and the cutting disc 23 are formed integrally to ensure the firm connection between the cutting disc 23 and the fixing seat 24. Of course, the fixing seat 24 and the cutting disk 23 may be bonded together, or the fixing seat 24 and the cutting disk 23 may be riveted together.

In one embodiment, the ceramic blade 232 is plural to improve cutting efficiency. In this embodiment, the plurality of ceramic blades 232 are disposed in two circles on the cutter head 231. In still other embodiments, the ceramic blades 232 may be arranged in a circle on the cutter head 231. Of course, the number of the ceramic blades 232 may be three, four, or the like on the cutter head 231. The widths of the two adjacent circles of ceramic blades 232 along the radial direction of the cutter head 231 can be set to be the same or different.

In one embodiment, the cutting disc 23 is an integrally formed structure made of ceramic material, and is convenient to manufacture and low in cost. Of course, in some embodiments, the ceramic blades 232 of the cutting disk 23 and the cutter head 231 may be separately manufactured, and the ceramic blades 232 may be fixed to the cutter head 231.

In one embodiment, referring to fig. 5, the ceramic blade 232 has a side surface 2322, the side surface 2322 intersects the cutting surface 2321 to form a cutting edge 2323, and an included angle a between the cutting surface 2321 and the side surface 2322 along the circumferential direction of the cutter head 231 is less than 90 degrees, so as to ensure sharpness and structural strength of the cutting edge 2323, thereby improving cutting efficiency.

In one embodiment, the cutting surface 2321 and the side surface 2322 form an angle a ranging from 45 degrees to 70 degrees along the circumferential direction of the cutter head 231, which ensures sharpness and structural strength of the cutting edge 2323 to improve cutting efficiency. When the included angle a between the cutting surface 2321 and the side surface 2322 is less than 45 degrees, the structural strength of the blade 2323 portion is low, and the blade is prone to wear and fracture. When the included angle a between the cutting surface 2321 and the side surface 2322 is greater than 70 degrees, the cutting edge 2323 is not sharp enough, and the cutting efficiency is low.

In one embodiment, referring to fig. 3 and 5, the side surface 2322 has an inner support surface 23221, the inner support surface 23221 is recessed inwardly, i.e., the inner support surface 23221 is recessed toward the other side of the cutting surface 2321, and the inner support surface 23221 intersects the cutting surface 2321 at the curved section 23231, i.e., the cutting surface 2321 intersects the inner support surface 23221 to form the curved section 23231 of the cutting edge 2323. Providing the inner support surface 23221 on the side surface 2322 makes the curved segment 23231 sharper, increasing shaving efficiency. Also, after the curved segment 23231 cuts hair, the inner support surface 23221 may better direct hair toward the cutter head 231 to discharge the cut hair.

In one embodiment, the angle between the inner support surface 23221 and the cutting surface 2321 is tapered, and the angle between the inner support surface 23221 and the cutting surface 2321 tapers from the middle of the curved segment 23231 to the end of the curved segment 23231. For example, at the corresponding position of the middle of the curved section 23231, the included angle between the inner support surface 23221 and the cutting surface 2321 is b1, at the corresponding position of the end of the curved section 23231, the included angle between the inner support surface 23221 and the cutting surface 2321 is b2, b1> b2, and the included angle between the inner support surface 23221 and the cutting surface 2321 is gradually reduced from the middle of the curved section 23231 to the end of the curved section 23231 from b1 to b 2. The structure not only can more conveniently process the shape of the curve section 23231 and ensure the processing precision, but also can adjust the angle between the inner supporting surface 23221 of each part and the length direction of the ceramic blade 232 body so as to better guide and discharge the cut hair.

In one embodiment, the angle between the inner support surface 23221 and the cutting surface 2321 is in the range of 45-68 degrees, and the angle between the inner support surface 23221 and the cutting surface 2321 is gradually changed in the range of 45-68 degrees, so that the curved section 23231 has good cutting efficiency and is convenient for guiding and discharging cut hairs.

In one embodiment, referring to fig. 6, the width w of the cutting edge 2323 along the radial direction of the cutter head 231 is in the range of 0.7-2mm to ensure a good width of the cutting edge 2323, thereby ensuring the structural strength and wear resistance of the ceramic blade 232 to ensure the cutting efficiency. When the width w of the cutting edge 2323 in the radial direction of the cutter disc 231 is less than 0.7mm, the cutting edge 2323 is too narrow, cutting efficiency is low, and strength is low. When the width w of the cutting edge 2323 in the radial direction of the cutter disc 231 is greater than 2mm, the cutting edge 2323 is too wide, and a large driving force is required during cutting, which adversely affects cutting efficiency and makes the cutting disc 23 have a large volume.

In the above embodiment, the width w of the cutting edge 2323 along the radial direction of the cutter disc 231 is in the range of 0.8-1.5mm, and on the basis of ensuring the width of the cutting edge 2323 and the cutting efficiency, the cutting edge 2323 can be made smaller, so that the cutting disc 23 can be made smaller, and the wear resistance and the structural strength of the ceramic blade 232 are ensured.

In one embodiment, referring to fig. 7, the thickness d of the cutter head 231 is in the range of 1-3mm to ensure good strength and less weight of the cutter head 231, and to reduce the cost, and to prevent cracking or chipping during the grinding process. In addition, the ceramic razor blade 22 is not easily chipped or chipped when dropped. When the thickness w of the cutter head 231 is less than 1mm, the cutter head 231 has low strength and is easily cracked or crumbled. When the thickness w of the cutter 231 is greater than 3mm, the cutter 231 is heavy, the cost is high, and sintering is inconvenient.

In the above embodiment, the thickness d of the cutter 231 ranges from 1.5mm to 2.5mm, which can better ensure the structural strength of the cutter 231, reduce the cost and facilitate sintering.

In one embodiment, referring to fig. 3, 7 and 8, the cutting surface 2321 is an arcuate surface with a central portion projecting away from the cutter head 231. The center of the cutting surface 2321 refers to the center of the cutting surface 2321 in the radial direction of the cutter head 231. The cutting face 2321 is set to be an arc-shaped face with a convex middle part, so that good cutting efficiency can be ensured.

In one embodiment, the protruding height h of the middle portion of the cutting face 2321 is in the range of 0.02-0.2mm relative to the side edge of the cutting face 2321, so that the cutting face 2321 is provided with an arc-shaped face with a slightly protruding middle portion for easy processing and ensuring good cutting efficiency.

In the above embodiment, the protruding height h of the middle portion of the cutting face 2321 relative to the side of the cutting face 2321 is in the range of 0.03-0.08mm, which not only facilitates the manufacturing, but also ensures the good cutting efficiency of the ceramic blade 232.

In one embodiment, when the cutting face 2321 is an arcuate face, the edge segment 23232 of the corresponding cutting edge 2323 is curved. When the cutting surface 2321 may also be a plane, the edge segment 23232 of the corresponding cutting edge 2323 is a straight line segment.

In one embodiment, referring to fig. 2, 11 and 12, the middle of the foil 21 is provided with a positioning shaft 212, the fixing base 24 is provided with a positioning groove 241, and the positioning shaft 212 is disposed in the positioning groove 241, so as to position the ceramic razor blade 22 and the foil 21 well, facilitate assembly, and facilitate good adhesion of the cutting surface 2321 to the inner surface 2112 of the shaving track 211.

The ceramic razor blade 232 of the ceramic razor blade 22 of the embodiment of the application has high hardness and good wear resistance, is not easy to wear and passivate during use, and can ensure long-term and good cutting efficiency and long service life. And when shaving or cutting hair, can lead hair to the middle position of curved section 23231 to better cut off hair, promote the efficiency of shaving.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (17)

1. A ceramic razor blade comprising a cutting disk characterized by: the cutting disc comprises a cutter disc and ceramic blades, the ceramic blades are arranged on the cutter disc, the ceramic blades are far away from one end of the cutter disc, a cutting face is arranged at one side of the cutting face, a cutting edge is arranged at one side of the cutting face, a curve section is arranged on the cutting edge, the curve section faces towards the middle part, the direction of the other side of the cutting face is sunken to form a curve, and the cutting face is far away from the middle part towards the convex arc-shaped face in the direction of the cutter disc.

2. The ceramic razor blade of claim 1, wherein: the curved section is located in the middle of the blade.

3. The ceramic razor blade of claim 2, wherein: the orthographic projections of the parts of the cutting edges at the two ends of the curve section on the cutter head are straight line sections.

4. The ceramic razor blade of claim 1, wherein: the ceramic blade is provided with a side surface which is intersected with the cutting surface to form the cutting edge, and the included angle between the cutting surface and the side surface along the circumferential direction of the cutter head is smaller than 90 degrees.

5. The ceramic razor blade of claim 4, wherein: the side surface has an inwardly recessed inner support surface therein that intersects the cutting surface at the curvilinear segment.

6. The ceramic razor blade of claim 5, wherein: the included angle between the inner supporting surface and the cutting surface is reduced from the middle part of the curve section to the end part of the curve section.

7. The ceramic razor blade of claim 6, wherein: the included angle between the inner supporting surface and the cutting surface ranges from 45 degrees to 68 degrees.

8. Ceramic razor blade according to any of claims 1 to 7, wherein: the width range of the cutting edge along the radial direction of the cutter head is 0.7-2 mm.

9. The ceramic razor blade of claim 8, wherein: the width range of the cutting edge along the radial direction of the cutter head is 0.8-1.5 mm.

10. Ceramic razor blade according to any of claims 1 to 7, wherein: the height range of the middle part of the cutting surface protruding relative to the side edge of the cutting surface is 0.02-0.2 mm.

11. The ceramic razor blade of claim 10, wherein: the height of the middle part of the cutting surface protruding relative to the side edge of the cutting surface is 0.03-0.08 mm.

12. Ceramic razor blade according to any of claims 1 to 7, wherein: the thickness range of the cutter head is 1-3 mm.

13. The ceramic razor blade of claim 12, wherein: the thickness range of the cutter head is 1.5-2.5 mm.

14. Ceramic razor blade according to any of claims 1 to 7, wherein: the cutting disc is an integrally formed structure made of ceramic materials.

15. A cutting unit, comprising a blade mesh having a shaving track, said shaving track having an inlet opening adapted for hair to enter said blade mesh, wherein: further comprising the ceramic razor blade of any of claims 1-14, said knife screen being mounted on said ceramic razor blade with a cutting surface of said ceramic razor blade in mating abutment with an inner surface of said shaving track.

16. A shaving head, comprising a housing, characterized in that: comprising a cutting unit as claimed in claim 15, mounted on the housing.

17. An electric shaver, comprising a handle, characterized in that: a razor head according to claim 16, the housing of the razor head being mounted on the handle.

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