Shaving blade with thin teeth, cutter head assembly and shaver

Abstract

The present invention relates to a shaving blade with thin teeth, a blade head assembly, and a shaver, characterized in that a blade tooth group consisting of a plurality of cutting teeth is provided at the edge of a substrate. The blade tooth group is recessed downward along the outer surface of the substrate so that the outer surface of each cutting tooth in the blade tooth group is lower than the outer surface of the substrate, and the inner surface protrudes from the inner surface of the substrate, and the edge of the blade tooth group is connected to the substrate via a stepped surface; a cutting working surface is provided on the inner surface of the blade tooth group, and the thickness of the blade tooth group is less than the thickness of the substrate. The beneficial effect of the present invention is that the blade tooth group is recessed downward along the outer surface of the substrate of the shaving blade, the inner surface of the blade tooth group is ground to form the cutting working surface, and the thickness of the blade tooth group is less than the thickness of the substrate. This not only ensures the flatness of the cutting working surface, reduces frictional resistance, and reduces the temperature rise and operating current of the shaving blade; at the same time, it minimizes the residual length of hair roots on the skin surface, improves the hair shaving effect, and ensures the working strength of the shaving blade.

Description

Technical Field

[0001] The present invention relates to a hair trimming blade, in particular to a shaving blade with thinner teeth and a shaver using the shaving blade. Background Art

[0002] The razor blade mainly uses a plurality of spaced teeth arranged side by side at the edge of the razor blade to trim hair. In order to ensure the flatness and working strength of the cutting surface of the razor blade and avoid deformation during the production process, the thickness of the existing razor blade plate is basically above 0.3mm.

[0003] Although using thicker plates can prevent deformation of the razor blades during production and ensure the flatness and working strength of the cutting surface of the razor blades, during the hair trimming process, the thickness of the plate affects the residual length of the hair roots, resulting in unclean shaving and failing to meet the user's needs. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a shaving blade with thin teeth, a cutter head assembly and a shaver, which can not only effectively ensure the working strength of the shaving blade, but also minimize the thickness of each cutting tooth to avoid long hair roots remaining during shaving, which can significantly improve the shaving effect of the shaving blade; and, can also greatly improve the flatness of the cutting surface, reduce the friction resistance during the shaving process, reduce the temperature rise of the shaving blade, and improve the comfort of using the shaving blade.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a shaving blade with thin teeth, comprising a base plate; a tooth group consisting of a plurality of cutting teeth is provided at the edge of at least one side of the base plate, the tooth group is recessed downward along the outer surface of the base plate so that the outer surface of each cutting tooth in the tooth group is lower than the outer surface of the base plate, and the inner surface protrudes from the inner surface of the base plate, and the edge of the tooth group is connected to the base plate through a step difference surface, and a cutting working surface is provided on the inner surface of the tooth group so that the thickness T1 of the tooth group is less than the thickness T2 of the base plate; wherein the step difference surface includes a first step difference surface, a second step difference surface and a third step difference surface, the first step difference surface connects the tooth root of each cutting tooth in the tooth group to the base plate as a whole, and the second step difference surface and the third step difference surface connect the two ends of the tooth group to the base plate respectively; and the second step difference surface and the third step difference surface have the same inclination angle, and the inclination angle is equal to, greater than or less than the inclination angle of the first step difference surface.

[0006] Preferably, the thickness T1 of the blade tooth group is greater than or equal to 0.08 mm and less than the thickness T2 of the substrate.

[0007] Preferably, the depth T3 of the tooth group recessed downward along the outer surface of the substrate is less than the thickness T2 of the substrate.

[0008] Preferably, the step surface of the outer surface of the substrate connecting the blade tooth group is inclined, and the inclination angle is ≤75°.

[0009] Preferably, the distance T4 between the connection points of the second and third differential surfaces and the substrate and the edges of both ends of the substrate is 3 mm to 5 mm.

[0010] Preferably, the outer surface of the substrate is arc-shaped in cross section, and the inner surface is a horizontal plane and is lower than the cutting working surface of the tooth group.

[0011] Preferably, the outer surface and the inner surface of the substrate are both horizontal surfaces, and the inner surface is lower than the cutting working surface of the tooth group.

[0012] Preferably, one side of the substrate on which the blade tooth group is arranged is provided with a bent edge with a height less than or equal to the thickness of the substrate so that the end of each cutting tooth in the blade tooth group forms a tooth bulge.

[0013] Preferably, at least one screw seat with a screw hole is provided at each end of the substrate, and each screw seat is fixedly connected to the inner surface of the substrate as a whole.

[0014] Preferably, a tooth group consisting of a number of cutting teeth is provided at the edges of both sides of the substrate, and each tooth group is recessed downward along the outer surface of the substrate so that the outer surface of each cutting tooth is lower than the outer surface of the substrate, and each edge of the tooth group is connected to the outer surface of the substrate through a step surface; a limiting guide rail is provided at the center of the inner surface of the substrate, and the limiting guide rail includes a limiting plate and a guide rail, the limiting plate is fixedly connected to the inner surface of the substrate as a whole, and the guide rail is perpendicular to the limiting plate and is an integrated structure with the limiting plate; a limiting groove is provided in the middle of the guide rail.

[0015] Different from the above technical solution, the present invention application also proposes another shaving blade with thin teeth, including a base plate; a tooth group consisting of a plurality of cutting teeth is provided at the edges of both sides of the base plate, and each tooth group is recessed downward along the outer surface of the base plate so that the outer surface of each cutting tooth is lower than the outer surface of the base plate, and the inner surface protrudes from the inner surface of the base plate, and each edge of the tooth group is connected to the outer surface of the base plate through a step surface; a cutting working surface is provided on the inner surface of the tooth group so that the thickness T1 of the tooth group is less than the thickness T2 of the base plate; a limiting guide rail is provided at the center of the inner surface of the base plate, and the limiting guide rail includes a limiting plate and a guide rail, the limiting plate is fixedly connected to the inner surface of the base plate as a whole, and the guide rail is perpendicular to the limiting plate and is an integral structure with the limiting plate; a limiting groove is provided in the middle of the guide rail.

[0016] Preferably, the thickness T1 of the blade tooth group is greater than or equal to 0.08 mm and less than the thickness T2 of the substrate.

[0017] Preferably, the depth T3 of the tooth group recessed downward along the outer surface of the substrate is less than the thickness T2 of the substrate.

[0018] Preferably, the step surface of the outer surface of the substrate connecting the blade tooth group is inclined, and the inclination angle is ≤75°.

[0019] Preferably, the step differential surface includes a first step differential surface, a second step differential surface and a third step differential surface. The first step differential surface connects the tooth root of each cutting tooth in the tooth group to the substrate as a whole. The second step differential surface and the third step differential surface connect the two ends of the tooth group to the substrate respectively, and the connection points of the second step differential surface and the third step differential surface with the substrate are respectively at a distance T4 of 3mm to 5mm from the edges of the two ends of the substrate.

[0020] Preferably, the second section differential surface and the third section differential surface have the same inclination angle, and the inclination angle is equal to, greater than, or less than the inclination angle of the first section differential surface.

[0021] Preferably, the outer surface of the substrate is arc-shaped in cross section, and the inner surface is a horizontal plane and is lower than the cutting working surface of the tooth group.

[0022] Preferably, the outer surface and the inner surface of the substrate are both horizontal surfaces, and the inner surface is lower than the cutting working surface of the tooth group.

[0023] Preferably, one side of the substrate on which the blade tooth group is arranged is provided with a bent edge with a height less than or equal to the thickness of the substrate so that the end of each cutting tooth in the blade tooth group forms a tooth bulge.

[0024] Preferably, at least one screw seat with a screw hole is provided at each end of the substrate, and each screw seat is fixedly connected to the inner surface of the substrate as a whole.

[0025] Based on the above-mentioned shaving blade, the present application also provides a technical solution of a cutter head assembly, including any of the above-mentioned shaving blades;

[0026] The movable blade is in contact with the cutting surface of the tooth group in the shaving blade and can swing back and forth along the limiting guide rail on the inner surface of the shaving blade;

[0027] The movable blade holder fixes the movable blade and keeps the movable blade in contact with the cutting surface of the shaving blade, and can be linked with the driving mechanism to drive the movable blade to swing back and forth along the cutting surface of the shaving blade;

[0028] The shaving blade holder is fixedly connected to the shaving blade and is connected to the shaving blade so that the movable blade and the movable blade holder can swing back and forth.

[0029] Preferably, the movable blade includes a movable blade body and a movable blade gasket. The movable blade body is a plane body, and a plurality of cutting teeth are respectively provided on its two side edges to match the tooth groups on both sides of the shaving blade. A square hole is provided at the center of the movable blade body, and the end face of the movable blade body is in contact with the cutting working surface of the tooth group of the shaving blade. The limiting guide rail passes through the square hole and is placed outside the movable blade body; the cross-section of the movable blade gasket is in the shape of a "J" and includes a slide groove and fixed plates placed on both sides of the slide groove. The fixed plates are fixedly connected to the movable blade body, and the slide groove is placed outside the guide rail of the limiting guide rail and can swing back and forth along the guide rail under external force.

[0030] Preferably, at least two oppositely arranged arc-shaped convex points are provided on the inner side walls on both sides of the slide groove, and each arc-shaped convex point is in contact with the outer side wall of the guide rail respectively.

[0031] Preferably, at least two oppositely arranged and staggered slot holes are provided at both ends of the side walls of the slide; the movable knife seat includes a hook connected to the slot holes on both sides of the slide to enable the movable knife seat to be clamped and fixed to the movable knife gasket.

[0032] Preferably, the hooks are staggeredly arranged on both sides of the swing block, and at least one positioning column is provided on the end face of the swing block; at least one positioning hole is provided on the bottom side wall of the slide groove, and the positioning column is inserted into the positioning hole to synchronize the movable knife gasket and the movable knife seat.

[0033] Preferably, positioning columns are respectively provided at both ends of the swing block, and a positioning block is provided between the two positioning columns; two positioning holes and linkage grooves that pass through both sides of the slide and match the positioning blocks are correspondingly provided on the side walls at the bottom of the slide, the positioning columns are respectively inserted into the positioning holes and the positioning blocks are placed in the linkage grooves so that the movable knife gasket is linked to the movable knife seat.

[0034] Preferably, spring columns are respectively provided at both ends of the end face of the swing block relative to the positioning column and the positioning block, and a swing groove linked to the driving mechanism is provided in the middle of the two spring columns. A pressure spring is respectively provided on each spring column to drive the movable knife gasket and the movable knife body to fit the cutting working surface of the tooth group. The other end of the pressure spring is provided on the convex column in the shaver seat and is pressed against the shaver seat.

[0035] Preferably, a plurality of comb teeth are provided on the outer walls on both sides of the razor seat, which are perpendicular to the reciprocating swing direction of the movable blade body. The cross-section of each comb tooth is a right-angled triangle. The width of the end close to the movable blade is greater than the width of the end away from the movable blade, and the distance between the end face close to the movable blade and the end face of the movable blade body of the movable blade is less than 2 mm; the spacing between each comb tooth is greater than 1 mm.

[0036] Preferably, a cavity for storing lubricant is provided on the end surface of the movable blade that contacts the cutting working surface of the tooth assembly.

[0037] Preferably, the lubricant storage cavity on the end surface of the movable blade is a countersunk hole, a through hole or a strip groove connecting the two ends of the movable blade.

[0038] Preferably, mounting holes are provided at both ends of the razor seat, and each mounting hole is provided with a fastening screw and is threadedly connected to the screw seat on the inner surface of the razor blade to movably fix the movable blade body, movable blade gasket, movable blade seat and top pressure spring on the razor blade.

[0039] Based on the above shaving blades and cutter head assembly, the present application also proposes a technical solution for a shaver, including a body, on which at least one of the above-mentioned cutter head assembly is provided, and the cutter head assembly includes the above-mentioned shaving blades.

[0040] The present invention has the beneficial effect of recessing the tooth group along the outer surface of the substrate of the shaving blade, so that the outer surface of the tooth group is lower than the outer surface of the substrate, and the inner surface protrudes from the inner surface of the substrate. The inner surface of the tooth group is then ground to form a cutting surface, and the thickness of the tooth group is made smaller than the thickness of the substrate. This not only ensures the flatness of the cutting surface, reduces frictional resistance, and lowers the temperature rise and operating current of the shaving blade; it also minimizes the residual length of hair roots on the skin surface, thereby improving hair removal efficiency and ensuring the working strength of the shaving blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A front view of a shaving blade with thin teeth according to an embodiment of the present invention

[0042] Figure 2 for Figure 1 Cross-sectional view of the first embodiment at AA

[0043] Figure 3 for Figure 1 Cross-sectional view of the second embodiment at AA

[0044] Figure 4 A front perspective view of a shaving blade with thin teeth according to an embodiment of the present invention

[0045] Figure 5 A three-dimensional back view of a shaving blade with thin teeth according to an embodiment of the present invention

[0046] Figure 6 A three-dimensional assembly structure diagram of a cutter head assembly according to an embodiment of the present invention

[0047] Figure 7 A three-dimensional assembly diagram of a shaving blade, a movable blade, and a movable blade holder according to an embodiment of the present invention

[0048] Figure 8 A three-dimensional exploded view of a cutter head assembly according to an embodiment of the present invention

[0049] Figure 9 A transverse cross-sectional view of a cutter head assembly according to an embodiment of the present invention

[0050] Figure 10 A longitudinal cross-sectional view of a cutter head assembly according to an embodiment of the present invention

[0051] Figure 11 A three-dimensional structural diagram of the movable blade body in an embodiment of the present invention

[0052] Figure 12 A rear perspective view of the movable blade gasket according to an embodiment of the present invention

[0053] Figure 13 A front perspective view of the movable blade gasket according to an embodiment of the present invention

[0054] Figure 14 A front perspective view of the movable knife seat according to an embodiment of the present invention

[0055] Figure 15 A rear perspective view of the movable knife seat according to an embodiment of the present invention

[0056] Figure 16 A side view of a shaving razor holder according to an embodiment of the present invention

[0057] Figure 17 A three-dimensional structural diagram of a razor holder according to an embodiment of the present invention DETAILED DESCRIPTION

[0058] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0059] like Figures 1 to 5As shown, the present invention is a shaving blade 1 with thin teeth. The blade comprises a base plate 1111, and a tooth group 12 comprising a plurality of cutting teeth 111 disposed on at least one edge of the base plate 11. Existing shaving blades 1 generally employ open-type cutting teeth 111, i.e., the tooth tips are independent, while the tooth roots are connected to the base plate 11. The tooth group 12 comprises a plurality of cutting teeth 111 spaced apart in a single direction. Because the inner and outer end surfaces of the existing cutting teeth 111 are coplanar or curved with the inner and outer end surfaces of the base plate 11, the thickness of the cutting teeth 111 is the same as that of the base plate 11. To ensure the operating strength of the shaving blade 1, the thickness of the existing shaving blade 1 is generally greater than 0.3 mm. While this meets the strength requirements, it also results in a relatively thick cutting tooth 111. During shaving, due to the thickness of the cutting teeth 111, the hair roots remain relatively long on the skin, resulting in an incomplete shaving and failing to meet user requirements. To solve the above technical problems, the present technical solution is to use a stamping process to recess the entire tooth group 12 downward along the outer surface of the substrate 11, so that the outer surface of each cutting tooth 111 is lower than the outer surface of the substrate 11, and the inner surface protrudes from the inner surface of the substrate 11, and a step surface 13 is formed between the tooth root of the cutting tooth 111 and the outer and inner surfaces of the substrate 11. Then, a grinding process is used to grind the inner surface of the tooth group 12 protruding from the inner surface of the substrate 11 to form a cutting working surface 14, and the thickness of each cutting tooth 111 in the tooth group 12 is made less than the thickness of the substrate 11. This not only greatly improves the overall flatness of the inner surface of the tooth group 12, but also reduces the frictional resistance between the movable blade 2 and the shaving blade 1 during use, reducing the temperature rise of the shaving blade 1 and the movable blade 2; at the same time, it can also minimize the thickness of each cutting tooth 111 in the tooth group 12. As is well known, the thinner the shaving blade 1, the shorter the hair roots remain on the skin during shaving, resulting in a better shaving effect and effectively meeting the user's needs. Furthermore, since only the teeth 12 are ground to reduce their thickness, while the base 11 is not affected, the working strength of the shaving blade 1 is effectively maintained.

[0060] like Figure 2 As shown, in order to reduce the production difficulty of the shaving blade 1, in the actual grinding process, the inner surface of the tooth group 12 and the step difference surface 13 connected to the inner surface of the tooth group 12 will be ground together to form an integral cutting working surface 14 slightly higher than the inner surface of the substrate 11. This facilitates the assembly of the movable blade 2 during assembly, and also allows the step difference surface 13 connecting the roots of the cutting teeth 111 in the tooth group 12 to gradually widen from narrow, avoiding stress concentration at the connection between the roots of each cutting tooth 111 and the step difference surface 13, which may cause the cutting teeth 111 to be broken due to force, thereby ensuring the working strength and service life of each cutting tooth 111 in the tooth group 12.

[0061] Of course, during the grinding operation, only the inner surface of each cutting tooth 111 in the tooth group 12 may be ground to reduce the thickness of each cutting tooth 111, such as Figure 3 However, such grinding will cause the stepped surface 13 connecting the roots of the cutting teeth 111 to be higher than the cutting working surface 14 of the tooth group 12, which is not only detrimental to the assembly of the movable blade 2, but also makes the connection between the roots of the cutting teeth 111 of the tooth group 12 and the stepped surface 13 prone to breaking, which correspondingly reduces the service life of the shaving blade 1. Therefore, grinding the inner surface of the tooth group 12 as a whole is the preferred embodiment.

[0062] In order to improve the hair shaving effect of the razor blade 1, the thickness T1 of the tooth group is greater than or equal to 0.08 mm and less than the thickness T2 of the substrate. The thickness T2 of the substrate is between 0.3 mm and 2 mm. In actual use, it will be changed according to different uses. For example, the thickness T2 of the substrate 11 used in the shaving field is preferably between 0.35 and 0.5 mm. The thickness T2 of the substrate 11 of the razor blade 1 used in the hairdressing field can be increased accordingly, and is basically above 0.5 mm. The specific choice can be determined according to the structure of the razor blade 1. Under normal circumstances, the thickness T2 of the substrate of the razor blade 1 used in the shaving field is preferably processed from 0.35 mm sheet material, which can ensure the working strength of the razor blade 1 while minimizing the production cost. In theory, the thinner the thickness of each cutting tooth 111 in the tooth group 12, the better the hair shaving effect of the razor blade 1. In order to prevent the cutting teeth 111 in the tooth set 12 from being deformed or broken, thereby affecting the shaving of hair, the thickness of the tooth set 12 can also be determined according to the hardness of the substrate 11 .

[0063] For example:

[0064] When the hardness of the substrate 11 is between HRC52 and HRC55, the thickness T1 of the tooth group (which can also be considered the thickness of each cutting tooth 111) is preferably 0.13 mm ± 0.03 mm. This prevents deformation, cracking, or breaking of the cutting teeth 111 when hair enters the adjacent hair guide groove, ensuring the working stability of each cutting tooth 111 and improving the hair cutting effect.

[0065] When the hardness of the substrate 11 is less than HRC52, the toughness of the substrate 11 is improved, and the thickness T1 of the tooth group can be set to 0.10 mm or less, thereby preventing the cutting teeth 111 in the tooth group 12 from cracking or breaking.

[0066] When the hardness of the substrate 11 is greater than HRC55, the toughness of the substrate 11 decreases accordingly, but its brittleness increases accordingly. In order to prevent the cutting teeth 111 in the tooth group 12 from cracking or breaking, the thickness of each cutting tooth 111 in the tooth group 12 can be increased accordingly. For example, the thickness T1 of the tooth group is set to one half, two thirds or three quarters of the thickness T2 of the substrate 11 to ensure the performance of the shaving blade 1.

[0067] The specific thickness of the blade tooth group 12 can be flexibly set according to the different materials and hardness of the substrate 11, and this embodiment does not impose any further restrictions.

[0068] To improve the fit of the shaving blade 1 with the skin during hair trimming and enhance the skin's comfort during shaving, the tooth group 12 is recessed downward along the outer surface of the substrate 11 to a depth T3 that is less than the substrate thickness T2. Setting the recessed depth T3 of the tooth group 12 to be less than the substrate thickness T2 allows the thickness of each cutting tooth 111 in the tooth group 12 to be reduced to the greatest extent possible during grinding of the inner surface of the tooth group 12. Simultaneously, the support connection provided by the step surface 13 ensures the working strength of each cutting tooth 111 in the tooth group 12, thereby ensuring the performance and operational stability of the shaving blade 1. Furthermore, because the height difference between the outer surface of the tooth group 12 and the outer surface of the substrate 11 (which can also be considered the recessed depth T3 of the tooth group 12 along the outer surface of the substrate 11) is less than the substrate thickness T2, when the outer surface of the tooth group 12 contacts the skin, the outer surface of the substrate 11 does not produce a pushing sensation against the skin, thereby effectively improving the fit of the shaving blade 1 with the skin and enhancing the user's comfort.

[0069] The thinner the blade set thickness T1, the greater the amount of grinding on the inner surface of each cutting tooth 111 in the blade set 12. Conversely, when the blade set thickness T2 increases, the less grinding on the inner surface of each cutting tooth 111 in the blade set 12. Therefore, in actual production, the depth T3 of the recess of the blade set 12 along the outer surface of the substrate 11 can also be determined based on the actual thickness T1 of each cutting tooth 111 in the blade set 12.

[0070] For example:

[0071] When the thickness T1 of each cutting tooth 111 in the tooth group 12 is required to be less than 0.10 mm, the amount of grinding required on the inner surface of each cutting tooth 111 in the tooth group 12 is relatively large. To ensure the operating strength of each cutting tooth 111 in the tooth group 12, the recess depth T3 of the tooth group 12 along the outer surface of the substrate 11 can be appropriately reduced (the optimal recess depth T3 is less than half the thickness T2 of the substrate 11). When grinding the inner surface of the tooth group 12, the step surface 13 is less ground. This allows the step surface 13 to support the root of each cutting tooth 111 in the tooth group 12, thereby ensuring the operating strength of each cutting tooth 111 in the tooth group 12.

[0072] When the thickness T1 of each cutting tooth 111 in the tooth set 12 is required to be greater than 0.20 mm, the amount of grinding performed on the inner surface of each cutting tooth 111 in the tooth set 12 is relatively small. In this case, the recess depth T3 of the tooth set 12 along the outer surface of the substrate 11 can be appropriately increased. For example, if the recess depth T3 is greater than the substrate thickness T2, or greater than two-thirds or one-half of the substrate thickness T2, the working strength of each cutting tooth 111 in the tooth set 12 can be maintained. However, this also increases the height difference between the outer surface of the tooth set 12 and the outer surface of the substrate 11. When the outer surface of the tooth set 12 contacts the skin, the outer surface of the substrate 11 exerts a pushing force on the skin, affecting the fit of the tooth set 12 and resulting in a relatively poor skin contact feel. Therefore, a preferred embodiment is one in which the recess depth T3 of the tooth set 12 along the substrate 11 is less than the thickness of the substrate 11. The specific recess depth T3 of the tooth set 12 can be determined based on the thickness T1 of the tooth set or user requirements.

[0073] To prevent the shaving blade 1 from causing a squeezing sensation on the skin surface when in contact, thereby affecting the smoothness of shaving and the comfort of the skin, the step surface 13 on the outer surface of the substrate 11 connecting to the tooth group 12 is inclined, with an inclination angle K ≤ 75°. This inclination angle K is the angle between the step surface 13 and the extension line of the junction between the outer surface of the substrate 11 and the step surface 13, or the angle between the step surface 13 and the extension line of the junction between the outer surface of the tooth group 12 and the step surface 13. From the perspective of the user comfort of the shaving blade 1, the flatter the inclination angle K of the step surface 13, the smoother the movement of the outer surface of the tooth group 12 and the outer surface of the substrate 11 along the skin surface during shaving. Therefore, the inclination angle K of the step surface 13 is preferably 15°±1°, which can relatively smoothly connect the outer surface of the tooth group 12 and the outer surface of the base plate 11. When the outer surface of the tooth group 12 contacts the skin and moves along the skin surface to shave hair, the outer surface of the base plate 11 will not produce a pushing feeling on the skin, thereby improving the skin comfort when the shaving blade 1 is used and ensuring the shaving smoothness of the shaving blade 1. Of course, the inclination angle K of the step surface 13 can also be set to be larger or smaller, such as setting the inclination angle K to 50° or larger, so that the inclined slope of the step surface 13 is steeper. When the outer surface of the tooth group 12 is in contact with the skin, the outer surface of the base plate 11 moves along the skin surface with the tooth group 12, and under the influence of the height difference, a pushing force is generated on the skin surface, which not only affects the smoothness of hair shaving, but also reduces the skin comfort. If the inclination angle K of the step surface 13 is set to a smaller value, such as setting the inclination angle K to be less than 5° or less, this will correspondingly increase the distance between the roots of the cutting teeth 111 in the tooth group 12 and the substrate 11. When the inner surface of the tooth group 12 is ground, the inner surface of the step surface 13 will also be removed, which will seriously affect the working strength of the cutting teeth 111 in the tooth group 12 during use. Secondly, if the skin contact feeling is not considered, the step surface 13 can also be directly set to a vertical shape. However, since the vertical step surface 13 is difficult to demold during stamping, setting the inclination angle K of the step surface 13 to 15°±1° is the preferred embodiment.

[0074] Existing shaving blades 1 generally employ open-type cutting teeth 111, i.e., the tooth tips are independent entities, while the tooth roots are connected to the substrate 11. The tooth group 12 has an open structure on one side, and the other three sides are connected to the substrate 11 via stepped surfaces 13. To ensure the working strength of the tooth group 12, the stepped surfaces 13 include a first stepped surface 131, a second stepped surface 132, and a third stepped surface 133. The first stepped surface 131 integrally connects the tooth roots of each cutting tooth 111 in the tooth group 12 to the substrate 11. The second stepped surface 132 and the third stepped surface 133 connect the two ends of the tooth group 12 to the substrate 11, respectively. Furthermore, the distance T4 between the second and third stepped surfaces 132, 133 and the two end edges of the substrate 11 is 3 mm to 5 mm. The distance T4 between the second and third differential surfaces 132, 133 and the edges of the substrate 11 at both ends is controlled to be 3 mm to 5 mm. During use, the reserved 3 mm to 5 mm edges of the substrate 11 at both ends can effectively support the tooth group 12, preventing the cutting teeth 111 in the tooth group 12 from twisting and deforming during use, thereby improving the performance and working stability of the shaving blade 1. If the edge distance T4 of 3 mm to 5 mm is not reserved at both ends of the substrate 11, and the ends of the tooth group 12 directly cover the ends of the substrate 11, then the tooth group 12 can only be connected to the substrate 11 by the first differential surface 131. During use, the cutting teeth 111 in the tooth group 12 are very likely to twist and deform, seriously affecting the performance and working stability of the shaving blade 1. Of course, the edge distance T4 at both ends of the substrate 11 can also be set to a larger value, such as 8mm, 10mm, or even larger. However, increasing the edge distance T4 will correspondingly increase the material cost of the substrate 11 or reduce the number of cutting teeth 111 in the tooth group 12, thereby reducing the shaving efficiency. Therefore, the optimal embodiment is to set the edge distance T4 at both ends of the substrate 11 between 3mm and 5mm. While ensuring the working strength of each cutting tooth 111 in the tooth group 12, it can also minimize the material cost of the substrate 11. The second section differential surface 132 and the third section differential surface 133 have the same inclination angle, and the inclination angle of the second section differential surface 132 and the third section differential surface 133 is equal to, greater than, or less than the inclination angle K of the first section differential surface 131. To reduce the difficulty of manufacturing the stamping die, the inclination angles of the first section differential surface 131, the second section differential surface 132, and the third section differential surface 133 are preferably the same. Of course, it can also be customized according to user requirements, and the specific settings are not further limited in this embodiment.

[0075] To improve the fit of the shaving blade 1 against the skin, the outer surface of the base plate 11 has an arcuate cross-section, while the inner surface is horizontal and lower than the cutting surface 14 of the tooth assembly 12. This curved outer surface of the base plate 11 allows for better fit during use, enhancing the shaving effect and efficiency of the shaving blade 1. Of course, the outer surface of the base plate 11 can also be horizontal as needed to suit the overall style of different shaving tools or the aesthetic preferences of different users. The specific configuration can be determined based on actual needs or user requirements.

[0076] To enhance the skin feel of the shaving blade 1 during use, a side of the substrate 11 where the tooth group 12 is located is provided with a bent edge having a height less than or equal to the thickness T2 of the substrate 11, thereby forming a tooth protrusion 15 at the end of each cutting tooth 111 in the tooth group 12. By providing a bent edge on the edge of one side of the substrate 11 where the tooth group 12 is located, during tooth cutting, a tooth protrusion 15 is formed at the end of each cutting tooth 111, with the tooth protrusion height T5 being less than or equal to the substrate thickness T2. Of course, the tooth protrusion 15 can also be formed without using a folding process. For example, when the substrate 11 is thick (greater than 0.5 mm), the tooth protrusion 15 structure can also be formed by controlling the distance between the grinding wheel and the edge of the substrate 11 when grinding the inner surface of the tooth group 12 to cut the working surface 14. However, due to the use of a grinding process to process the tooth protrusion 15 structure, the thickness of the substrate 11 is required to be thicker, and the amount of grinding will also be significantly increased, which not only increases the material cost of the substrate 11, but also reduces the processing efficiency of the cutting working surface 14 of the tooth group 12. Therefore, the use of a folding process to form the tooth protrusion 15 is the preferred embodiment. The purpose of providing the tooth protrusion 15 structure at the end of the cutting tooth 111 is mainly to prevent the end of the cutting tooth 111 from puncturing the skin and improving the safety of the shaving blade 1. And the tooth protrusion 15 is used to stimulate the skin, especially when shaving the head, the tooth protrusion 15 at the end of each cutting tooth 111 can play a role similar to a comb, stimulating the nerves of the head, accelerating the blood circulation and blood oxygen supply of the head skin, thereby producing a more comfortable skin feel and improving the comfort of the shaving blade 1.

[0077] To facilitate the assembly of the shaving blade 1 and improve assembly efficiency, at least one screw seat 16 with a screw hole is provided at each end of the substrate 11, and each screw seat 16 is fixedly connected to the inner surface of the substrate 11 as a whole. Conventional shaving blades 1 are inserted into the shaving base 4 by relying on the two ends of the substrate 11. This installation structure is not only not conducive to the injection molding of the shaving base 4, but also increases the difficulty of making the injection mold of the shaving base 4. In addition, due to the influence of processing accuracy, during use, the shaving blade 1 may also slide along the slot in the shaving base 4, which can easily cause hair to get stuck or pulled. Therefore, by installing screw seats 16 with screw holes at each end of the inner surface of the substrate 11, the shaving base 4 can be directly fixedly connected to the shaving blade 1 by tightening screws 44 during assembly, which can effectively prevent the shaving blade 1 from being displaced after assembly, prevent hair from getting stuck or pulled due to the displacement of the shaving blade 1, and improve the comfort and working stability of the shaving blade 1. In actual production, the screw seat 16 can be fixedly connected to the shaving blade 1 by bonding, welding or other similar processes.

[0078] In order to improve the shaving efficiency of the shaving blade 1, a tooth group 12 consisting of a plurality of cutting teeth 111 is provided at the edges of both sides of the base sheet 11, and each tooth group 12 is recessed downwardly from the outer surface of the base sheet 11 so that the outer surface of each cutting tooth 111 is lower than the outer surface of the base sheet 11, and each edge of the tooth group 12 is connected to the outer surface of the base sheet 11 via a step surface 13; by providing the tooth groups 12 recessed downwardly along the outer surface of the base sheet 11 at the edges of both sides of the base sheet 11, the shaving blade 1 does not need to be frequently turned in direction during use, and hair can be shaved by simply moving the shaving blade 1 back and forth along the skin, thereby increasing the hair feed channel and improving the shaving efficiency of the shaving head.

[0079] When shaving, the shaving blade 1 relies on the reciprocating swing of the movable blade 2 along the cutting surface 14 of the tooth assembly 12. To ensure the stability of the shaving operation and prevent the movable blade 2 from misaligning along the cutting surface 14 of the tooth assembly 12, which could affect the hair-cutting performance of the shaving blade 1, a limiting guide rail 17 is provided at the center of the inner surface of the base plate 11. A limiting plate 171 of the limiting guide rail 17 is fixedly connected to the inner surface of the base plate 11 (such connection can be achieved by bonding or welding, etc.). A guide rail 172 connected to the limiting plate 171 is perpendicular to the inner surface of the base plate 11 and is provided with a limiting groove 173. During use, the movable blade 2 is placed on the guide rail 172 and driven by an external drive mechanism to reciprocate along the guide rail 172. This effectively prevents the movable blade 2 from misaligning during the reciprocating swinging process, thus ensuring the operational stability of the shaving blade 1. By providing a limiting groove 173 on the guide rail 172, the limiting groove 173 can limit the left and right swing stroke of the movable blade 2 when the movable blade 2 slides back and forth along the guide rail 172, preventing excessive swing stroke from damaging the shaving blade 1 or the movable blade 2. In actual production, the limiting piece 171 and the guide rail 172 are an integrated structure formed by multiple bending processes; and the width of the guide rail 172 is greater than the width of the limiting piece 171. The guide rail 172 that extends beyond the limiting piece 171 restrains the movable blade 2, preventing the movable blade 2 from separating from the shaving blade 1.

[0080] like Figures 6 to 17 As shown, based on the above-mentioned razor blade 1, the present application also provides a technical solution for a cutter head assembly, comprising a razor blade 1 as described in any of the above items; a movable blade 2 that is in contact with the cutting working surface 14 of the tooth group 12 in the razor blade 1 and can swing back and forth along the limiting guide rail 17 on the inner surface of the razor blade 1; the movable blade 2 is connected to a movable blade holder 3 and is kept in contact with the cutting working surface 14 of the razor blade 1 through the movable blade holder 3, the movable blade holder 3 is linked to a driving mechanism and, driven by the driving mechanism, the movable blade 2 can swing back and forth along the cutting working surface 14 of the razor blade 1; the razor blade 1 is fixedly connected to the razor holder 4, and the movable blade 2 and the movable blade holder 3 can be movably placed in the razor holder 4 to form a whole with the razor blade 1. When the cutter head assembly is assembled, the razor holder 4 can directly fix the razor blade 1, the movable blade 2 and the movable blade holder 3 to the body, and the driving mechanism installed on the body is linked to the movable blade holder 3. The above-mentioned shaving blade 1 can not only improve the hair trimming effect of the cutter head assembly and improve the skin feel, but also, under the action of the limiting guide rail 17, can effectively prevent the movable blade 2 from being misaligned when it swings back and forth along the shaving blade 1, thereby ensuring the working stability and safety of the cutter head assembly.

[0081] To facilitate the production and assembly of the movable blade 2, the movable blade 2 includes a movable blade body 21 and a movable blade gasket 22. The movable blade body 21 is a planar body, one end of which is aligned with the cutting surface 14 of the tooth group 12 of the shaving blade 1. A plurality of cutting teeth 111 are provided on its two side edges to mate with the tooth groups 12 on both sides of the shaving blade 1. Because a limiting guide rail 17 is provided on the inner surface of the shaving blade 1, and the length of the guide rail 172 is greater than the length of the limiting plate 171, a square hole 211 is provided at the center of the movable blade body 21 to facilitate alignment of the movable blade body 21 with the cutting surface 14 of the tooth group 12 of the shaving blade 1. The length of the square hole 211 is less than the length of the guide rail 172 and greater than the length of the limiting plate 171. During assembly, one end of the square hole 211 is first inserted into one end of the guide rail 172 and moved along the guide rail 172. This allows the other end of the square hole 211 of the movable blade body 21 to pass through the guide rail 172, placing the movable blade body 21 between the guide rail 172 and the inner surface of the shaving blade 1. The movable blade gasket 22 has a "F"-shaped cross-section and has a slot 221 that mates with the guide rail 172. Fixed plates 222 are provided on either side of the slot 221. The fixed plates 222 securely connect the movable blade body 21 and the movable blade gasket 22 together. The fixed plates 222 can be connected to the end surface of the movable blade body 21 by bonding, clamping, or welding. By splitting the movable blade 2 into a movable blade body 21 and a movable blade gasket 22, not only is processing and molding facilitated, but the sliding groove 221 within the movable blade gasket 22 also cooperates with the limiting guide rail 17 on the inner surface of the shaving blade 1, thereby preventing the movable blade 2 from misaligning when it swings back and forth along the cutting working surface 14 of the tooth group 12 under external force, thereby ensuring the operating stability and performance of the cutter head assembly. To reduce the frictional resistance between the sliding groove 221 of the movable blade gasket 22 and the limiting guide rail 17 of the shaving blade 1, thereby reducing the temperature rise and operating current of the shaving blade 1, at least two opposing arc-shaped protrusions 223 are provided on the inner sidewalls of both sides of the sliding groove 221, and each arc-shaped protrusion 223 is respectively in contact with the outer sidewall of the guide rail 172. By providing at least two opposing arcuate protrusions 223 on the contacting sides of the chute 221 and the guide rail 172, the surface contact between the chute 221 and the guide rail 172 is replaced with point contact, effectively reducing the contact area between the chute 221 and the guide rail 172. When an external force drives the movable blade 2 to swing horizontally back and forth along the shaving blade 1, the reduced contact area correspondingly reduces frictional resistance, thereby reducing the temperature rise and operating current of the shaving blade 1 and the movable blade 2, improving the user comfort of the cutter head assembly, and extending the service life and life of the shaver battery.

[0082] Because the movable blade 2 requires external force to swing horizontally back and forth along the limiting guide rail 17 on the inner surface of the shaving blade 1 to trim and shave hair, to facilitate the synchronous linkage between the movable blade 2 and the driving mechanism, at least two oppositely arranged and offset latch holes 2211 are provided at both ends of the side walls of the slide 221. The latch hooks 32 provided on the movable blade holder 3 are engaged with the latch holes 2211, thereby forming a detachable fixed connection between the movable blade gasket 22 and the movable blade holder 3. When the movable blade holder 3 is driven by the driving mechanism to swing back and forth, the latch hooks 32 of the movable blade holder 3 can correspondingly drive the movable blade gasket 22 and the movable blade body 21 fixedly connected to the movable blade gasket 22 to swing back and forth synchronously along the limiting guide rail 17 on the inner surface of the shaving blade 1, thereby shaving hair. In actual production, two mutually offset slot holes 2211 are respectively provided on the outer side walls on both sides of the slide groove 221 of the movable knife gasket 22. This can ensure that the snapping force of the hooks 32 on both sides of the movable knife seat 3 acts evenly on both sides of the movable knife gasket 22, thereby ensuring the firmness of the connection between the movable knife seat 3 and the movable knife gasket 22.

[0083] Because the hook 32 on the movable blade holder 3 and the slot 2211 of the movable blade washer 22 primarily connect the movable blade washer 22 to the movable blade holder 3, the thin sidewalls of the slot 221 of the movable blade washer 22 result in a relatively small contact area between the sidewalls of the hook 32 of the movable blade holder 3 and the sidewalls of the slot 2211 of the slot 221. This can easily cause the hook 32 to break when the movable blade holder 3 and the drive mechanism reciprocate synchronously. To prevent breakage of the hook 32 during synchronous operation of the movable blade washer 22 and the movable blade holder 3, the hooks 32 are staggered on either side of the swing block 31. At least one positioning post 33 is provided on the end surface of the swing block 31. At least one positioning hole 2212 is provided on the bottom sidewall of the slot 221. The positioning post 33 is inserted into the positioning hole 2212 to synchronize the movable blade washer 22 with the movable blade holder 3. At least one positioning post 33 is provided on the contact surface of the swing block 31 and the slide groove 221, and the positioning post 33 is inserted into the positioning hole 2212 of the slide groove 221 of the movable blade gasket 22 to drive the movable blade gasket 22 and the movable blade holder 3 to swing back and forth synchronously. This not only ensures the synchronous linkage between the movable blade gasket 22 and the movable blade body 21 and the movable blade holder 3, thereby ensuring the hair shaving performance; but also effectively prevents the breakage of the hook 32, thereby ensuring the firmness of the connection between the movable blade holder 3 and the movable blade gasket 22.

[0084] In order to ensure the synchronous linkage performance of the movable knife seat 3 and the movable knife gasket 22 to the greatest extent, and prevent the reciprocating swing performance of the movable knife gasket 22 and the movable knife body 21 from being affected by the breakage of the positioning column 33 under stress, positioning columns 33 are respectively provided at both ends of the swing block 31 of the movable knife seat 3, and a positioning block 34 is provided between the two positioning columns 33; two positioning holes 2212 and linkage grooves 2213 that pass through both sides of the slide groove 221 and match the positioning blocks 34 are correspondingly provided on the bottom side wall of the slide groove 221, the positioning columns 33 are respectively inserted into the positioning holes 2212 and the positioning blocks 34 are placed in the linkage grooves 2213 to make the movable knife gasket 22 and the movable knife seat 3 linked and connected. By providing positioning holes 2212 at both ends of the swing block 31 of the movable blade holder 3 and providing a positioning block 34 between the two positioning posts 33, during assembly, the positioning posts 33 on the swing block 31 are respectively inserted into the positioning holes 2212 on the chute 221 of the movable blade gasket 22, while the positioning block 34 is engaged with the linkage groove 2213 in the middle of the chute 221. When the hooks 32 on either side of the swing block 31 are connected with the hooks 32 on either side of the chute 221 of the movable blade gasket 22, the two positioning posts 33 and the positioning block 34 on the swing block 31 form a limiting connection with the positioning holes 2212 and the positioning block 34 on the chute 221 of the movable blade gasket 22. When the movable blade holder 3 reciprocates in synchronization with the drive mechanism, the two positioning posts 33 and the positioning block 34 synchronously drive the movable blade gasket 22 and the movable blade body 21 to reciprocate along the cutting surface 14 of the shaving blade 1, thereby achieving hair shaving.

[0085] In order to ensure that the movable blade body 21 of the movable blade 2 is always in contact with the cutting working surface 14 of the tooth group 12 of the shaving blade 1, and to prevent the hair trimming performance from being affected by the loose contact between the end face of the movable blade body 21 and the cutting working surface 14 of the tooth group 12; spring columns 35 are respectively provided at both ends of the end face of the swing block 31 relative to the positioning column 33 and the positioning block 34, and a swing groove 36 linked to the driving mechanism is arranged between the two spring columns 35, and a pressure spring 37 is respectively provided on each spring column 35 to drive the movable blade gasket 22 and the movable blade body 21 to fit the cutting working surface 14 of the tooth group 12, and the other end of the pressure spring 37 is sleeved on the convex column 41 in the shaving seat 4 and pressed against the shaving seat 4. By adding a spring column 35 to the swing block 31 of the movable blade holder 3 and sleeved with a pressure spring 37 on the spring column 35, during assembly, one end of the pressure spring 37 presses against the shaving blade holder 4, and the other end presses against the swing block 31 of the movable blade holder 3. The swing block 31 presses the movable blade gasket 22, and the movable blade gasket 22 transmits the elastic force of the pressure spring 37 to the movable blade body 21, so that the end face of the movable blade body 21 always fits the cutting working surface 14 of the tooth group 12 of the shaving blade 1, thereby ensuring the hair cutting performance of the cutter head assembly. A swing groove 36 is provided between the two spring columns 35 on the swing block 31. When the cutter head assembly is connected to the body of the shaver, the swing groove 36 can be linked to the drive mechanism in the body of the shaver.

[0086] During shaving, one side wall of the razor holder 4 may come into contact with the skin. At this point, the skin may wrinkle under the pressure of the cutter head assembly. To prevent skin injuries, a plurality of comb teeth 42 are provided on the outer side walls of the razor holder 4, perpendicular to the reciprocating direction of the movable blade body 21. Each comb tooth 42 has a right-angled triangular cross-section, with a width closer to the movable blade 2 than the width farther from the movable blade 2. The end face closer to the movable blade 2 is less than 2 mm in distance T6 from the end face of the movable blade body 21 of the movable blade 2. The spacing between the comb teeth 42 is greater than 1 mm. During shaving, the comb teeth 42 on both sides of the razor holder 4 flatten the skin, preventing it from wrinkling under the pressure of the cutter head assembly and entering between two adjacent cutting teeth 111 of the cutter tooth group 12. This improves the safety of the cutter head assembly and prevents skin injuries during shaving. The spacing between the end faces of each comb tooth 42 and the end face of the movable blade body 21 is less than 2 mm to prevent skin wrinkling during shaving, which could result in the skin entering the cutting teeth 111 and causing scratches. Setting the spacing T7 between each comb tooth 42 to be greater than 1 mm, preferably 1.5 mm to 3 mm, also prevents skin wrinkles from entering the cutting teeth 111 when the shaving head assembly is in contact with the skin. Setting the spacing between comb teeth 42 too small, such as less than 1 mm, increases the material cost of the comb teeth 42. Setting it too large, such as greater than 10 mm or 20 mm, reduces the skin-flattening effect of the comb teeth 42.

[0087] To reduce frictional resistance between the movable blade body 21 and the shaving blade 1, a lubricant storage cavity 212 is provided on the end surface of the movable blade body 21 of the movable blade 2 where it contacts the cutting surface 14 of the tooth group 12. The lubricant is placed in the cavity 212 during assembly, and then the movable blade body 21 is brought into contact with the cutting surface 14 of the tooth group 12. As the movable blade holder 3, driven by the drive mechanism, causes the movable blade gasket 22 and the movable blade body 21 to reciprocate along the cutting surface 14 of the tooth group 12 of the shaving blade 1, the lubricant automatically lubricates the end surface of the movable blade body 21 and the cutting surface 14 of the tooth group 12, effectively reducing frictional resistance between the movable blade body 21 and the cutting surface 14 of the tooth group 12, reducing the temperature rise of the shaving blade 1 and the movable blade body 21, and improving the user comfort of the cutter head assembly.

[0088] To facilitate storage of lubricating material, the lubricating material storage cavity 212 on the end surface of the movable blade body 21 is a spaced countersunk hole, a through hole or a strip groove connecting the two ends of the movable blade body 21. The specific choice can be determined according to the actual structure of the movable blade body 21 and is not further limited in this embodiment.

[0089] In order to prevent the movable blade body 21, movable blade gasket 22 and movable blade holder 3 of the movable blade 2 from detaching from the shaving blade 1 and affecting the shaving performance of the cutter head assembly, mounting holes 43 are respectively provided at both ends of the shaving blade holder 4. Each mounting hole 43 is respectively provided with a fastening screw 44 and is threadedly connected to the screw seat 16 on the inner surface of the shaving blade 1 to movably fix the movable blade body 21, movable blade gasket 22, movable blade holder 3 and top pressure spring 37 to the shaving blade 1. The shaving blade holder 4 has a semi-enclosed structure. The movable blade body 21, movable blade gasket 22 and movable blade holder 3 are respectively placed in the shaving blade holder 4, and the swing groove 36 of the movable blade holder 3 passes through the swing hole 45 of the shaving blade holder 4 and is linked to the drive mechanism. Reinforcement blocks 46 are provided on both sides of the swing hole 45 of the razor seat 4. Bosses 41 for fixing the pressure spring 37 are respectively disposed in the reinforcement blocks 46. The pressure spring 37, with the aid of the razor seat 4, sequentially presses the movable blade seat 3 and the movable blade gasket 22, so that the movable blade body 21 always maintains contact with the cutting working surface 14 of the blade tooth group 12 of the razor blade 1. At the same time, fastening screws 44 are threadedly connected through the mounting holes 43 at both ends of the razor seat 4 to the screw seats 16 fixed at both ends of the inner surface of the razor blade 1, thereby fixing the movable blade seat 3, the movable blade gasket 22, and the movable blade body 21 so that they can swing back and forth between the razor seat 4 and the razor blade 1.

[0090] Based on the above shaving blade 1 and cutter head assembly, the present application also proposes a shaver technical solution, including a body, on which at least one above-mentioned cutter head assembly is provided, and the cutter head assembly includes the above-mentioned shaving blade.

[0091] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A shaving blade with thin teeth, comprising a base plate (11); characterized in that A tooth group (12) consisting of a plurality of cutting teeth (111) is provided at at least one side edge of the substrate (11). The tooth group (12) is recessed downward along the outer surface of the substrate (11), so that the outer surface of each cutting tooth (111) in the tooth group (12) is lower than the outer surface of the substrate (11), and the inner surface protrudes from the inner surface of the substrate (11). The edge of the tooth group (12) is connected to the substrate (11) via a step surface (13). A cutting working surface (14) is provided on the inner surface of the tooth group (12), so that the thickness T1 of the tooth group is smaller than the thickness T2 of the substrate. The step differential surface (13) comprises a first step differential surface (131), a second step differential surface (132) and a third step differential surface (133); the first step differential surface (131) connects the tooth roots of each cutting tooth (111) in the tooth group (12) to the base plate (11) as a whole; the second step differential surface (132) and the third step differential surface (133) connect the two ends of the tooth group (12) to the base plate (11) respectively; and the second step differential surface (132) and the third step differential surface (133) have the same inclination angle, and the inclination angle is equal to, greater than or less than the inclination angle of the first step differential surface (131).

2. A shaving blade with thin teeth according to claim 1, characterized in that The thickness T1 of the blade tooth group is greater than or equal to 0.08 mm and less than the thickness T2 of the substrate.

3. A shaving blade with thin teeth according to claim 1, characterized in that The blade tooth group (12) is recessed downward along the outer surface of the substrate (11) to a depth T3 that is less than the thickness T2 of the substrate.

4. A shaving blade with thin teeth according to claim 1, characterized in that The step surface (13) of the outer surface of the substrate (11) connected to the blade tooth group (12) is inclined, and the inclination angle is ≤75°.

5. A shaving blade with thin teeth according to claim 1 or 4, characterized in that The distance T4 between the connection points of the second differential surface (132) and the third differential surface (133) and the substrate (11) and the edges of both ends of the substrate (11) is 3 mm to 5 mm.

6. A shaving blade with thin teeth according to claim 1, characterized in that The outer surface of the substrate (11) is arc-shaped in cross section, and the inner surface is a horizontal plane and is lower than the cutting working surface (14) of the blade tooth group (12).

7. A shaving blade with thin teeth according to claim 1, characterized in that The outer surface and inner surface of the substrate (11) are both horizontal surfaces, and the inner surface is lower than the cutting working surface (14) of the blade tooth group (12).

8. A shaving blade with thin teeth according to claim 1, characterized in that The side of the substrate (11) where the tooth group (12) is arranged is provided with a bent edge with a height less than or equal to the thickness of the substrate (11), so that the end of each cutting tooth (111) in the tooth group (12) forms a tooth protrusion (15).

9. A shaving blade with thin teeth according to claim 1, characterized in that At least one screw seat (16) with a screw hole is respectively provided at both ends of the substrate (11), and each screw seat (16) is fixedly connected to the inner surface of the substrate (11) as a whole.

10. A shaving blade with thin teeth according to claim 1, characterized in that A tooth group (12) consisting of a plurality of cutting teeth (111) is provided at the edges of both sides of the substrate (11), each tooth group (12) is recessed downward along the outer surface of the substrate (11) so that the outer surface of each cutting tooth (111) is lower than the outer surface of the substrate (11), and each edge of the tooth group (12) is connected to the outer surface of the substrate (11) through a step surface (13); a limiting guide rail (17) is provided at the center of the inner surface of the substrate (11), the limiting guide rail (17) comprising a limiting piece (171) and a guide rail (172); the limiting piece (171) is fixedly connected to the inner surface of the substrate (11) as a whole, the guide rail (172) is perpendicular to the limiting piece (171) and forms an integral structure with the limiting piece (171); a limiting groove (173) is provided in the middle of the guide rail (172).

11. A shaving blade with thin teeth, comprising a base plate (11); characterized in that A tooth group (12) consisting of a plurality of cutting teeth (111) is provided at the edges of both sides of the substrate (11). Each tooth group (12) is recessed downward along the outer surface of the substrate (11) so that the outer surface of each cutting tooth (111) is lower than the outer surface of the substrate (11), and the inner surface protrudes from the inner surface of the substrate (11). Each edge of the tooth group (12) is connected to the outer surface of the substrate (11) through a step surface (13). A cutting working surface is provided on the inner surface of the tooth group (12). (14) The thickness T1 of the tooth group is smaller than the thickness T2 of the substrate; a limiting guide rail (17) is provided at the center of the inner surface of the substrate (11), the limiting guide rail (17) comprising a limiting piece (171) and a guide rail (172); the limiting piece (171) is fixedly connected to the inner surface of the substrate (11) as a whole; the guide rail (172) is perpendicular to the limiting piece (171) and forms an integral structure with the limiting piece (171); a limiting groove (173) is provided in the middle of the guide rail (172).

12. A shaving blade with thin teeth according to claim 11, characterized in that The thickness T1 of the blade tooth group is greater than or equal to 0.08 mm and less than the thickness T2 of the substrate.

13. A shaving blade with thin teeth according to claim 11, characterized in that The blade tooth group (12) is recessed downward along the outer surface of the substrate (11) to a depth T3 that is less than the thickness T2 of the substrate.

14. A shaving blade with thin teeth according to claim 11, characterized in that The step surface (13) of the outer surface of the substrate (11) connected to the blade tooth group (12) is inclined, and the inclination angle is ≤75°.

15. A shaving blade with thin teeth according to claim 11 or 14, characterized in that The step differential surface (13) comprises a first step differential surface (131), a second step differential surface (132) and a third step differential surface (133); the first step differential surface (131) connects the tooth roots of each cutting tooth (111) in the tooth group (12) to the substrate (11) as a whole; the second step differential surface (132) and the third step differential surface (133) connect the two ends of the tooth group (12) to the substrate (11) respectively; and the connection points of the second step differential surface (132) and the third step differential surface (133) with the substrate (11) are respectively at a distance T4 of 3 mm to 5 mm from the edges of the two ends of the substrate (11).

16. A shaving blade with thin teeth according to claim 15, characterized in that The second section differential surface (132) and the third section differential surface (133) have the same inclination angle, and the inclination angle is equal to, greater than, or less than the inclination angle of the first section differential surface (131).

17. A shaving blade with thin teeth according to claim 11, characterized in that The outer surface of the substrate (11) is arc-shaped in cross section, and the inner surface is a horizontal plane and is lower than the cutting working surface (14) of the blade tooth group (12).

18. A shaving blade with thin teeth according to claim 11, characterized in that The outer surface and inner surface of the substrate (11) are both horizontal surfaces, and the inner surface is lower than the cutting working surface (14) of the blade tooth group (12).

19. A shaving blade with thin teeth according to claim 11, characterized in that The side of the substrate (11) where the tooth group (12) is arranged is provided with a bent edge with a height less than or equal to the thickness of the substrate (11), so that the end of each cutting tooth (111) in the tooth group (12) forms a tooth protrusion (15).

20. A shaving blade with thin teeth according to claim 11, characterized in that At least one screw seat (16) with a screw hole is respectively provided at both ends of the substrate (11), and each screw seat (16) is fixedly connected to the inner surface of the substrate (11) as a whole.

21. A cutter head assembly, characterized in that A shaving blade (1) with thin teeth comprising any one of claims 1 to 10 or 11 to 20; A movable blade (2) is in contact with a cutting working surface (14) of a tooth group (12) in a shaving blade (1) and can swing back and forth along a limiting guide rail (17) on the inner surface of the shaving blade (1); A movable blade holder (3) fixes the movable blade (2) and keeps the movable blade (2) in contact with the cutting working surface (14) of the shaving blade (1), and can be linked with a driving mechanism to drive the movable blade (2) to swing back and forth along the cutting working surface (14) of the shaving blade (1); The shaving blade holder (4) is fixedly connected to the shaving blade (1) and enables the movable blade (2) and the movable blade holder (3) to be connected to the shaving blade (1) in a manner that allows the movable blade (2) and the movable blade holder (3) to swing back and forth.

22. A cutter head assembly according to claim 21, characterized in that The movable blade (2) comprises a movable blade body (21) and a movable blade gasket (22). The movable blade body (21) is a plane body. A plurality of cutting teeth (111) are provided on both side edges thereof to match the tooth groups (12) on both sides of the shaving blade (1). A square hole (211) is provided at the center of the movable blade body (21). The end face of the movable blade body (21) is in contact with the cutting working surface (14) of the tooth group (12) of the shaving blade (1). The limiting guide rail (17) passes through the square hole (211) and is placed outside the movable knife body (21); the movable knife gasket (22) has a cross-section in the shape of a Chinese character "F" and includes a slide groove (221) and fixed plates (222) placed on both sides of the slide groove (221); the fixed plates (222) are fixedly connected to the movable knife body (21); the slide groove (221) is placed outside the guide rail (172) of the limiting guide rail (17) and can swing back and forth along the guide rail (172) under the drive of an external force.

23. A cutter head assembly according to claim 22, characterized in that At least two arc-shaped convex points (223) are arranged opposite to each other on the inner side walls of both sides of the slide groove (221), and each arc-shaped convex point (223) is respectively in contact with the outer side wall of the guide rail (172).

24. The cutter head assembly according to claim 22, characterized in that At least two oppositely arranged and staggered slot holes (2211) are provided at both ends of the side walls of the slide groove (221); the movable knife seat (3) includes a hook (32) hooked and connected to the slot holes (2211) on both sides of the slide groove (221) so that the movable knife seat (3) and the movable knife gasket (22) are fixedly connected.

25. A cutter head assembly according to claim 24, characterized in that The hooks (32) are staggeredly arranged on both sides of the swing block (31), and at least one positioning column (33) is provided on the end surface of the swing block (31); at least one positioning hole (2212) is provided on the bottom side wall of the slide groove (221), and the positioning column (33) is inserted into the positioning hole (2212) to synchronize the movable knife gasket (22) and the movable knife seat (3).

26. A cutter head assembly according to claim 24, characterized in that Positioning posts (33) are respectively provided at both ends of the swing block (31), and a positioning block (34) is provided between the two positioning posts (33); two positioning holes (2212) and linkage grooves (2213) that pass through both sides of the slide groove (221) and match the positioning blocks (34) are correspondingly provided on the side wall at the bottom of the slide groove (221); the positioning posts (33) are respectively inserted into the positioning holes (2212) and the positioning blocks (34) are placed in the linkage grooves (2213) so that the movable knife gasket (22) is linked to the movable knife seat (3).

27. A cutter head assembly according to claim 24, characterized in that Spring columns (35) are respectively provided at both ends of the end surface of the swing block (31) relative to the positioning column (33) and the positioning block (34). A swing groove (36) linked to the driving mechanism is provided between the two spring columns (35). A pressure spring (37) is respectively provided on each spring column (35) for driving the movable knife gasket (22) and the movable knife body (21) to fit with the cutting working surface (14) of the knife tooth group (12). The other end of the pressure spring (37) is provided on a protruding column (41) in the shaving cutter seat (4) and is pressed against the shaving cutter seat (4).

28. The cutter head assembly according to claim 21, characterized in that A plurality of comb teeth (42) are respectively provided on the outer side walls on both sides of the shaving blade seat (4) and are perpendicular to the reciprocating swing direction of the movable blade body (21). The cross section of each comb tooth (42) is in the shape of a right triangle. The width of the end close to the movable blade (2) is greater than the width of the end away from the movable blade (2). The distance T6 between the end face close to the movable blade (2) and the end face of the movable blade body (21) of the movable blade (2) is less than 2 mm. The spacing between the comb teeth (42) is greater than 1 mm.

29. The cutter head assembly according to claim 21, characterized in that A lubricant storage cavity (212) is provided on the end surface of the movable blade body (21) that contacts the cutting working surface (14) of the blade tooth group (12).

30. A cutter head assembly according to claim 29, characterized in that The lubricant storage cavity (212) on the end surface of the movable blade body (21) is a countersunk hole, a through hole or a strip groove connecting the two ends of the movable blade (2) arranged at intervals.

31. A cutter head assembly according to any one of claims 21 to 30, characterized in that Mounting holes (43) are respectively provided at both ends of the shaving blade holder (4), and each mounting hole (43) is respectively provided with a fastening screw (44) and is threadedly connected to a screw seat (16) on the inner surface of the shaving blade (1) to movably fix the movable blade body (21), the movable blade gasket (22), the movable blade holder (3) and the pressure spring (37) on the shaving blade (1).

32. A shaver, characterized in that The machine body comprises a machine body, on which is provided at least one cutter head assembly according to any one of claims 21 to 31.

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