Fixed cutter of reciprocating type shaver

Abstract

The utility model discloses a stationary knife of a reciprocating type shaver, which is manufactured and formed by powder metallurgy and comprises a left end part and a right end part, a knife net part with mesh design is integrally formed between the left end part and the right end part, a plurality of cutting teeth extending laterally are arranged on the front side and / or the rear side of the knife net part, and the plurality of cutting teeth on each side are arranged in a row. A bristle inlet groove is formed between every two adjacent cutting teeth, the cutting teeth are laterally suspended, fixed cutter faces are arranged at the bottoms of the cutter net part and the cutting teeth respectively, and the material thickness of the left end and the material thickness of the right end are larger than that of the cutter net part. The mesh holes and the cutting teeth are integrated on the fixed cutter, the cutter head structure of the reciprocating type shaver is simplified, the number of parts on the cutter head of the reciprocating type shaver and the assembling procedures are reduced, and batch production is facilitated.

Description

Technical field

[0001] The utility model relates to a fixed knife of a reciprocating shaver. [Background Technology]

[0002] Existing reciprocating razors, especially women's razors, usually have a cutting structure composed of two blade groups. One blade group is a blade net located in the middle and a corresponding movable blade structure. The other blade group is a fixed blade with lateral cutting teeth and a corresponding movable blade structure located outside the blade net. The cutting teeth of the fixed blade are laterally suspended in the air and have a relatively large material thickness for cutting long hair. The blade net is relatively thin and is used for shaving cleanly. The two blade groups are connected together by other structures. The structure is complex, with many parts and many assembly steps, such as the technical solution disclosed in patent publication number CN111687891A.

[0003] The present invention is made based on the above situation. [Utility Model Content]

[0004] The technical problem to be solved by the utility model is to provide a fixed blade of a reciprocating shaver with a simple structure, on which mesh holes and cutting teeth are integrated, so as to simplify the cutter head structure of the reciprocating shaver and reduce the number of parts and assembly procedures on the cutter head of the reciprocating shaver.

[0005] In order to solve the above technical problems, the utility model provides a fixed knife of a reciprocating shaver, which is manufactured by powder metallurgy and includes left and right end parts. A knife net part with a mesh design is integrally formed between the left and right end parts. The front side and / or the rear side of the knife net part is provided with a plurality of laterally extending cutting teeth. The plurality of cutting teeth on each side are arranged in a row, and a hair feeding groove is provided between two adjacent cutting teeth. The cutting teeth are laterally suspended, and a fixed knife surface is provided at the bottom of the knife net part and the cutting teeth respectively. The material thickness of the left and right end parts is greater than the material thickness of the knife net part.

[0006] In the fixed blade of a reciprocating shaver as described above, the blade mesh portion is an arc-shaped structure protruding upward relative to the cutting teeth. In the front-to-back direction, the material thickness of the blade mesh portion is small in the middle and large on both sides.

[0007] As described above, the fixed blade of a reciprocating shaver has a fixed blade surface corresponding to the blade mesh portion that is an arc-shaped structure with a greater curvature than the top surface of the blade mesh portion, and the material thickness of the blade mesh portion is small in the middle and gradually increases towards both sides.

[0008] In the fixed blade of a reciprocating shaver as described above, the bottom of the blade mesh portion is provided with reinforcing ribs, which connect the left and right ends and divide the bottom of the blade mesh portion into three cutting areas: front, middle and back.

[0009] In the fixed blade of the reciprocating shaver as described above, in the front-to-back direction, the mesh holes in the middle of the blade net portion are small, while the mesh holes on both sides are large.

[0010] In the fixed blade of the reciprocating shaver as described above, an upwardly protruding massage structure is integrally formed between the blade mesh portion and the cutting teeth.

[0011] In the fixed blade of a reciprocating shaver as described above, the mesh holes include irregular polygonal mesh holes.

[0012] In the fixed blade of a reciprocating shaver as described above, the material thickness of the cutting teeth is greater than that of the blade mesh portion, and the thickness of the cutting teeth is between 0.25 mm and 0.4 mm.

[0013] As described above, the fixed blade of a reciprocating shaver has the left and right ends protruding above the blade mesh part, and the fixed blade surface at the bottom of the blade mesh part extends through the entire fixed blade on the left and right sides; or the top surfaces of the left and right ends are flush or substantially flush with the top surface of the blade mesh part, and the bottom of the blade mesh part is concave upward relative to the left and right ends.

[0014] The fixed blade of the reciprocating shaver as described above has a smooth transition between the outer end surface of the end portion and the front and rear side surfaces, and a curved smooth transition is provided between the top surface and the side surfaces of the end portion.

[0015] In the fixed blade of a reciprocating shaver as described above, the heads of the cutting teeth are provided with thickened heads, and the thickening heads and the cutting teeth are integrally injection-molded.

[0016] In the fixed blade of the reciprocating shaver as described above, the front and rear sides of the blade mesh portion are provided with reinforced connecting portions, and the reinforced connecting portions connect the left and right ends.

[0017] In the fixed blade of a reciprocating shaver as described above, the tops of the mesh holes and the hair feed grooves are provided with rounded corners, and the side walls of the mesh holes and the hair feed grooves form cutting edges with acute angles.

[0018] The fixed blade of a reciprocating shaver as described above is located below the chamfer R, the side wall of the mesh or the hair feed groove is an inclined straight line segment, or the side wall of the mesh or the hair feed groove is an inwardly concave arc segment, or the side wall of the mesh or the hair feed groove includes a first inclined segment and a second inclined segment, relative to the up and down directions, the inclination of the first inclined segment is greater than the second inclined segment, the first inclined segment and the fixed blade surface constitute a cutting edge; or the chamfer R extends to the fixed blade surface, and the side wall of the mesh or the hair feed groove is composed of the chamfer R.

[0019] As described above, the fixed blade of a reciprocating shaver has a plurality of recesses on the surface of the blade mesh part between the mesh holes. The recesses are integrally injection-molded with the blade mesh part, and the surface of the blade mesh part and the recesses form a concave and convex skin contact surface.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] 1. The fixed blade of the utility model is integrally formed with a mesh-designed blade mesh portion located in the middle and rows of cutting teeth extending laterally. The fixed blade integrates the design of two blade groups, the mesh and the cutting teeth, thereby simplifying the blade head structure of the reciprocating shaver, reducing the number of parts and assembly procedures on the blade head of the reciprocating shaver, and the powder metallurgy manufacturing process of the fixed blade of the reciprocating shaver is simple, which is conducive to mass production.

[0022] 2. The top surfaces of the left and right ends of the fixed knife are flush or substantially flush with the top surface of the blade mesh portion, avoiding the formation of steps between the top surfaces of the ends and the top surface of the blade mesh portion, so that the top surface of the fixed knife has a better skin feel. Furthermore, there is a smooth transition between the outer end surface of the end and the front and rear side surfaces, and a smooth curved transition is provided between the top surface and the side surfaces of the end, so that the top surface and the side surfaces of the end can be used as the outer end surfaces of the shaver for contacting the skin, thereby improving the skin feel during shaving and avoiding the need to provide additional protective shells at the left and right ends of the top of the fixed knife, which is conducive to simplifying the structure of the shaver, reducing the length between the left and right sides, and reducing the volume of the shaver head.

[0023] 3. The utility model provides an upwardly protruding massage structure between the blade mesh part and the cutting teeth. The massage structure massages the skin during shaving, reduces skin irritation, and improves the skin feel during shaving. The massage structure is integrally injection-molded with the blade mesh part and the cutting teeth, and has a simple structure and a simple manufacturing process.

[0024] 4. The mesh is injection molded by a mold, which makes it easy to make irregular polygonal meshes and other special-shaped holes, so that hair in different directions can enter and be cut.

[0025] 5. The head of the cutting tooth has a thickened head, so as to improve the skin feel of the cutting tooth when it moves on the skin. The thickening head and the cutting tooth are integrally injection molded, which has a simple process, is easy to manufacture and produce, and is easy to control the shape of the thickening head.

Brief Description of the Drawings

[0026] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a structural diagram of a fixed blade blank of a reciprocating shaver of the utility model;

[0028] Figure 2This is a bottom schematic diagram of a fixed blade blank of a reciprocating shaver of the utility model;

[0029] Figure 3 2 is a schematic structural diagram of an embodiment in which the knife mesh portion has irregular polygonal meshes;

[0030] Figure 4 The utility model is a fixed blade blank of a reciprocating shaver. Figure 5 Cross-sectional view in the middle BB direction;

[0031] Figure 5 The utility model is a fixed blade blank of a reciprocating shaver. Figure 4 Cross-sectional view in the AA direction;

[0032] Figure 6 This is a structural diagram of a fixed blade of a reciprocating shaver of the utility model;

[0033] Figure 7 This is a schematic structural diagram of an embodiment of a fixed knife with a thickened head on the head of the cutting teeth;

[0034] Figure 8 This utility model is a fixed blade edge of a reciprocating shaver Figure 5 Cross-sectional view in CC direction;

[0035] Figure 9 This is a schematic diagram of a structure with reinforcing ribs at the bottom of the mesh portion;

[0036] Figure 10a 2 is a schematic structural diagram of an embodiment in which the fixed blade surface at the bottom of the mesh portion is upwardly concave;

[0037] Figure 10b It is a structural schematic diagram of an embodiment in which the outer end surface of the end portion and the front and rear side surfaces have a smooth transition, and the top surface and side surfaces of the end portion have a smooth transition;

[0038] Figure 11 It is a structural diagram of a fixed knife with a massage structure;

[0039] Figures 12a-12d Schematic diagrams of structures of different embodiments of cross sections of meshes or hair feed slots;

[0040] Figure 13 It is a structural schematic diagram of an embodiment in which the bottom of the mesh or the wool feeding groove is enclosed with material;

[0041] Figure 14 It is a structural schematic diagram of an embodiment in which the bottom of the mesh or the wool feeding groove is not closed;

[0042] Figure 15 It is a partial schematic diagram of an embodiment in which a concave portion is provided on the surface of the blade mesh portion. [Specific implementation method]

[0043] The present invention will be further described below with reference to the accompanying drawings:

[0044] like Figure 3 、 6 The powder metallurgy manufacturing process of the fixed blade of a reciprocating shaver shown in Figure 12d includes the following steps:

[0045] A. The raw material with stainless steel powder is injected into the injection molding machine to obtain the fixed blade blank, such as Figure 1 、 2 As shown in , 4, and 5, the fixed knife blank includes two left and right end portions 1, a mesh portion 2 with a mesh design is provided between the left and right end portions 1, and a plurality of laterally extending cutting teeth 3 are provided on the front and / or rear sides of the mesh portion 2. The plurality of cutting teeth 3 on each side are arranged in a row, and there is a gap between two adjacent cutting teeth 3.

[0046] A hair feeding groove 4 is provided;

[0047] B. Place the fixed knife blank into the degreasing furnace for degreasing;

[0048] C. Place the degreased fixed blade blank into the sintering furnace for sintering;

[0049] D. Heat-treating and hardening the sintered fixed blade blank;

[0050] E. Remove part of the material from the bottom of the knife net part 2 and the cutting teeth 3 by turning, milling or grinding to form a fixed knife surface 5, so that the mesh 20 on the knife net part 2 forms a through hole that passes through from top to bottom and the hair feeding groove 4 forms a through groove that passes through from top to bottom, the cutting teeth 3 are suspended laterally, and the material thickness of the left and right ends 1 is greater than the material thickness of the knife net part 2, so as to obtain a fixed knife. Figures 6 to 11 The material thickness of the end portion 1 is greater than that of the blade mesh portion 2, so that the obtained fixed blade has good structural strength and is conducive to processing and forming the fixed blade.

[0051] Preferably, in the above step A, Figure 13 In the embodiment shown, the mesh 20 and the bottom of the feed groove 4 are closed, which is easy to produce and form. In step C, the fixed blade blank obtained after sintering has a material thickness T of ≥ 0.2 mm for the mesh 20 and the bottom of the feed groove 4. When removing the material in step E, all the material of the mesh 20 and the bottom of the feed groove 4 is removed, as shown in FIG. Figure 13 The material below will be cut off at the position of L1 in the figure. Figure 14 In the embodiment shown, the mesh 20 and the bottom of the hair inlet groove 4 are not closed.

[0052] Preferably, in step E, the lower end of the fixed blade blank is surface ground by a grinder to grind off a set material thickness. The set material thickness can be set by inputting a value into the grinder or manually adjusting the setting, such as grinding off Figure 13 or Figure 14 The material thickness below L1 is shown, and the fixed blade surface 5 corresponding to the cutting teeth 3 is ground so that the fixed blade surface 5 corresponding to the cutting teeth 3 is coplanar with the lower end surface of the fixed blade blank, as shown in FIG. Figure 8-10a As shown, the process of removing part of the material from the bottom of the cutting tooth 3 is simple, which is conducive to grinding the fixed blade surface of the cutting tooth to be smoother, so as to improve the cutting sharpness of the cutting tooth.

[0053] In one embodiment, a raw material having stainless steel powder is prepared by uniformly mixing stainless steel powder and POM powder and then producing a granular raw material through a granulator, wherein the mass proportion of POM powder is 5% to 15%; preferably, the stainless steel powder can be selected from 440C stainless steel powder, 316 stainless steel powder or 420 stainless steel powder; preferably, the mass proportion of POM powder is 8%±2%, and the particle size of the stainless steel powder and the POM powder is less than 20 μm, such as 3 μm to 8 μm.

[0054] Preferably, the outer diameter of the granules produced by the granulator is less than 5 mm; the degreasing temperature in step B is 100°C to 150°C, and oxalic acid is introduced into the degreasing furnace to vaporize the POM material in the fixed knife blank at high temperature and remove it, and the degreasing time is 6h to 10h.

[0055] Preferably, the sintering time in step C is 20 hours to 30 hours, wherein the maximum sintering temperature t is set between 1200°C and 1400°C, and preferably, the temperature is maintained for 2-5 hours after the temperature is raised to the set maximum temperature t. In one embodiment, from the beginning to the end, the temperature ranges and times of the sintering are: sintering from room temperature to 900°C for 3-8 hours, sintering from 900°C to 1200°C for 2-6 hours, sintering from 1200°C to 1400°C for 2-5 hours, sintering from 1200°C to 1000°C for 0.5-5 hours, and sintering from 1000°C to room temperature for 8-15 hours. Of course, the sintering temperature ranges and sintering times can also be other set values.

[0056] Preferably, the heat treatment in step D is first quenching to make the hardness of the fixed knife blank reach 52HRC±3HRC, and then tempering to 45HRC±3HRC, which is conducive to processing and forming the fixed knife and making the obtained fixed knife structure stable.

[0057] The powder metallurgy manufacturing process enables the produced fixed blade to be integrally formed with a mesh-designed blade portion located in the middle and rows of cutting teeth extending laterally in the air. The fixed blade integrates the design of two blade groups, the mesh and the cutting teeth, thereby simplifying the blade head structure of the reciprocating shaver, reducing the number of parts and assembly steps on the blade head of the reciprocating shaver, and the powder metallurgy manufacturing process of the fixed blade of the reciprocating shaver is simple, which is conducive to mass production.

[0058] Preferably, in the above step A, the mesh 20 and the hair feeding groove 4 have groove walls that are inclined upward and outward, and the tops of the mesh 20 and the hair feeding groove 4 are provided with chamfered corners R. In the above step E, after part of the material is cut off from the bottom of the knife net part 2 and the cutting teeth 3 to form the fixed knife surface 5, the side walls of the mesh 20 and the hair feeding groove 4 form a cutting edge 9 with an acute angle, as shown in FIG. Figures 12a-12d In the embodiment shown, the rounded corners R improve the comfort of skin-friendly movement, and the sharp-angled cutting edge 9 improves the sharpness of cutting. The rounded corners R and the inclined groove walls are formed by a powder metallurgy manufacturing process, which is simple and easy to implement.

[0059] The material thickness of the cutting teeth 3 of the prepared fixed knife is greater than the material thickness at the position of the mesh 20. In step C, the fixed knife blank obtained after sintering has a radius r of the chamfer R on the mesh 20 that satisfies 0.03mm≤r≤0.10mm, and a radius r of the chamfer R on the feed groove 4 that satisfies 0.05mm≤r≤0.20mm.

[0060] Preferably, the angle a of the cutting edge 9 is ≤ 80°. Figure 12a In the embodiment shown, below the rounded corner R, the side wall of the mesh 20 or the hair feeding groove 4 is an inclined straight line segment 11, or as shown in FIG. Figure 12c In the embodiment shown, the side wall of the mesh 20 or the hair feeding groove 4 is an inwardly concave arc segment 12, or as shown in FIG. Figure 12d In the embodiment shown, the side wall of the mesh 20 or the hair feeding groove 4 includes a first inclined section 13 and a second inclined section 14. With respect to the up and down direction, the slope of the first inclined section 13 is greater than that of the second inclined section 14. The first inclined section 13 and the fixed blade surface 5 form a cutting edge 9; or as Figure 12b In the illustrated embodiment, the rounded corner R extends to the fixed blade surface 5 , and the side walls of the mesh 20 or the hair feeding groove 4 are composed of the rounded corner R.

[0061] Figure 12c and Figure 12d The embodiment shown is conducive to making the cutting edge 9 have a smaller acute angle a, thereby improving sharpness.

[0062] The left and right ends 1 are made of thick material and have good structural strength. As a strength supporting structure, the blade mesh part 2 of the fixed knife blank is an upward convex arc structure. The fixed knife prepared in the above step E has a material thickness of the blade mesh part 2 that is small in the middle and large on both sides in the front-to-back direction, so that the blade mesh part 2 has good structural strength and the middle part of the blade mesh part 2 can be made thin to improve the shaving quality.

[0063] Furthermore, in the front-to-back direction, the material thickness of the knife net part 2 is small in the middle and large on both sides, and the mesh holes in the middle of the knife net part 2 are small and the mesh holes on both sides are large, so as to ensure the cutting safety while making it easy for the mesh holes on both sides to feed hair.

[0064] like Figure 8 and Figure 10a In the illustrated embodiment, the fixed blade surface 5 corresponding to the blade mesh portion 2 is an arc-shaped structure with a greater curvature than the top surface of the blade mesh portion 2. The material thickness of the blade mesh portion 2 is thinner in the middle and gradually increases towards the sides. The blade mesh portion 2 has an arched structure, with a thinner center and thicker edges in the front-to-back direction, facilitating a clean shave while maintaining structural strength.

[0065] Or as Figure 9 In the embodiment shown, a reinforcing rib 6 is provided at the bottom of the blade mesh portion 2, and the reinforcing rib 6 connects the left and right end portions 1. The reinforcing rib 6 divides the bottom of the blade mesh portion 2 into three cutting areas: a front cutting area 21, a middle cutting area 22, and a rear cutting area 23. Through the action of the reinforcing rib 6, the material thickness of the front, middle, and rear cutting areas is made thinner, thereby improving the shaving cleanliness and increasing the area that can be shaved.

[0066] Furthermore, in the fixed knife prepared in step E, the material thickness of the cutting teeth 3 is greater than the material thickness of the blade mesh part 2, and the thickness of the cutting teeth 3 is between 0.25mm and 0.4mm, so that the suspended cutting teeth have better structural strength and are conducive to shaving long hair short, and short hair can better enter the mesh 20 of the blade mesh part 2 for cutting.

[0067] Further, if Figure 7 and 11 In the embodiment shown, an upwardly protruding massage structure 10 is provided between the blade mesh portion 2 and the cutting teeth 3. The massage structure 10 is integrally injection-molded with the blade mesh portion 2 and the cutting teeth 3, and has a simple structure and a simple manufacturing process.

[0068] Further, if Figure 7 、 10aIn the embodiment shown in 10b, on the fixed knife blank, the head of the cutting tooth 3 is integrally injection-molded with a thickened head 15. After removing material from the bottom of the cutting tooth 3, the head of the cutting tooth 3 has a thickened head 15, thereby improving the skin feel of the cutting tooth 3 when it moves on the skin. The process is simple, easy to manufacture and produce, and easy to control the shape of the thickened head 15.

[0069] like Figure 3 In the embodiment shown, the mesh 20 comprises irregular polygonal meshes, which facilitates the entry of hair in different directions for cutting. The irregular mesh here refers to meshes having irregular shapes and / or irregular arrangements.

[0070] like Figure 4-5 In the embodiment shown, the left and right ends 1 of the fixed knife blank are raised above the knife net part 2. When part of the material is cut off from the bottom of the knife net part 2 and the cutting teeth 3, the corresponding bottoms of the knife net part 2 and the cutting teeth 3 completely cut off the material from the left end to the right end of the fixed knife blank, so that the mesh 20 on the knife net part 2 forms a through hole that passes through from top to bottom and the hair feeding groove 4 forms a through groove that passes through from top to bottom, and the cutting teeth 3 are laterally suspended. Figure 8-9 As shown, the fixed blade surface 5 at the bottom of the blade mesh part 2 and the cutting teeth 3 runs through the entire fixed blade. The process is simple, the manufacturing is convenient, and the fixed blade surface 5 is easy to grind. The left and right ends 1 have thicker materials to improve the structural strength.

[0071] Or as Figure 10a and Figure 10b In the embodiment shown, the top surfaces of the left and right ends 1 of the fixed knife are flush or substantially flush with the top surface of the blade mesh portion 2, avoiding the formation of a step between the top surface of the end 1 and the top surface of the blade mesh portion 2, so that the top surface of the fixed knife has a better skin feel. When part of the material is cut from the bottom of the blade mesh portion 2, the bottom of the blade mesh portion 2 is concave upward relative to the left and right ends 1, so that the left and right ends 1 have thicker material, thereby improving the structural strength. Figure 10b In the embodiment shown, a smooth transition is formed between the outer end surface of the end portion 1 and the front and rear side surfaces, and a curved surface 16 is provided between the top surface and the side surfaces of the end portion 1 for a smooth transition, so that the top surface and the side surfaces of the end portion 1 can be used as the outer end surfaces of the shaver for contacting the skin, thereby improving the skin feel during shaving and avoiding the need to provide additional protective shells at the left and right ends of the top of the fixed blade, thereby simplifying the structure of the shaver and reducing the length between the left and right sides, thereby reducing the volume of the shaver head.

[0072] Furthermore, in the fixed knife obtained in step E, the front and rear sides of the knife net part 2 are provided with a reinforcing connection part 7, and the reinforcing connection part 7 connects the left and right end parts 1, so that the knife net part 2 is surrounded by the end parts 1 and the reinforcing connection part 7 on all sides, forming a strength support structure of the knife net part 2, improving the structural strength of the knife net part 2, and cutting teeth are provided on the outside of the reinforcing connection part 7.

[0073] Further, if Figure 15 In the embodiment shown, a plurality of recesses 24 are provided on the surface of the blade mesh portion between the mesh holes. The recesses 24 are integrally injection-molded with the blade mesh portion 2. The material thickness of the blade mesh portion 2 can be reduced at the positions corresponding to the recesses 24, thereby improving the shaving cleanliness. Moreover, the surface of the blade mesh portion and the recesses 24 form a concave and convex skin contact surface, which facilitates the entry of hair into the mesh holes for cutting.

Claims

1. A fixed blade of a reciprocating shaver, characterized in that: The invention is manufactured by powder metallurgy and comprises left and right end portions (1). A mesh-designed knife net portion (2) is integrally formed between the left and right end portions (1). The front side and / or the rear side of the knife net portion (2) are provided with a plurality of laterally extending cutting teeth (3). The plurality of cutting teeth (3) on each side are arranged in a row. A feed groove (4) is provided between two adjacent cutting teeth (3). The cutting teeth (3) are laterally suspended. The bottoms of the knife net portion (2) and the cutting teeth (3) are respectively provided with fixed knife surfaces (5). The material thickness of the left and right end portions (1) is greater than the material thickness of the knife net portion (2).

2. The fixed blade of a reciprocating shaver according to claim 1, characterized in that: The knife net portion (2) is an upwardly convex arc-shaped structure. In the front-to-back direction, the material thickness of the knife net portion (2) is small in the middle and large on both sides.

3. The fixed blade of a reciprocating shaver according to claim 2, characterized in that: The fixed blade surface (5) corresponding to the blade mesh part (2) is an arc-shaped structure with a curvature greater than that of the top surface of the blade mesh part (2), and the material thickness of the middle part of the blade mesh part (2) is small and gradually increases towards both sides.

4. The fixed blade of a reciprocating shaver according to claim 2, characterized in that: The bottom of the knife net portion (2) is provided with a reinforcing rib (6), the reinforcing rib (6) connecting the left and right ends (1), and the reinforcing rib (6) divides the bottom of the knife net portion (2) into three cutting areas (21, 22, 23), namely, front, middle, and rear.

5. The fixed blade of a reciprocating shaver according to claim 2, characterized in that: In the front-to-back direction, the mesh holes in the middle of the knife net part (2) are small, and the mesh holes on both sides are large.

6. The fixed blade of a reciprocating shaver according to claim 1, characterized in that: An upwardly protruding massage structure (10) is integrally formed between the blade mesh portion (2) and the cutting teeth (3).

7. The fixed blade of a reciprocating shaver according to claim 1, characterized in that: The mesh (20) comprises an irregular polygonal mesh.

8. The fixed blade of a reciprocating shaver according to claim 1, characterized in that: The material thickness of the cutting teeth (3) is greater than that of the blade mesh portion (2), and the thickness of the cutting teeth (3) is between 0.25 mm and 0.4 mm.

9. The fixed blade of a reciprocating shaver according to any one of claims 1 to 8, characterized in that: The left and right end portions (1) protrude above the knife net portion (2), and the fixed knife surface (5) at the bottom of the knife net portion (2) penetrates the entire fixed knife from left to right.

10. The fixed blade of a reciprocating shaver according to any one of claims 1 to 8, characterized in that: The top surfaces of the left and right end portions (1) are flush or substantially flush with the top surface of the knife net portion (2), and the bottom of the knife net portion (2) is concave upward relative to the left and right end portions (1).

11. The fixed blade of a reciprocating shaver according to claim 10, characterized in that: There is a smooth transition between the outer end surface of the end portion (1) and the front and rear side surfaces, and a curved surface (16) is provided between the top surface and the side surfaces of the end portion (1) for a smooth transition.

12. A fixed blade of a reciprocating shaver according to any one of claims 1 to 8 and 11, characterized in that: The head of the cutting tooth (3) is provided with a thickened head (15), and the thickened head (15) and the cutting tooth (3) are integrally injection-molded.

13. The fixed blade of a reciprocating shaver according to any one of claims 1 to 8, characterized in that: Reinforced connecting parts (7) are provided on the front and rear sides of the blade net part (2), and the reinforced connecting parts (7) connect the left and right end parts (1).

14. The fixed blade of a reciprocating shaver according to any one of claims 1 to 8, characterized in that: The tops of the mesh holes (20) and the hair feeding groove (4) are provided with rounded corners R, and the side walls of the mesh holes (20) and the hair feeding groove (4) form cutting edges (9) with acute angles.

15. The fixed blade of a reciprocating shaver according to claim 14, characterized in that: Located below the chamfered corner R, the side wall of the mesh (20) or the hair feed groove (4) is an inclined straight line segment (11), or the side wall of the mesh (20) or the hair feed groove (4) is an inwardly concave arc segment (12), or the side wall of the mesh (20) or the hair feed groove (4) includes a first inclined segment (13) and a second inclined segment (14), and relative to the up and down directions, the inclination of the first inclined segment (13) is greater than that of the second inclined segment (14), and the first inclined segment (13) and the fixed blade surface (5) form a cutting edge (9); or the chamfered corner R extends to the fixed blade surface (5), and the side wall of the mesh (20) or the hair feed groove (4) is composed of the chamfered corner R.

16. A fixed blade of a reciprocating shaver according to any one of claims 1 to 8 and 15, characterized in that: A plurality of recesses (24) are provided on the surface of the blade mesh portion (2) between the mesh holes (20); the recesses (24) and the blade mesh portion (2) are integrally injection-molded; the surface of the blade mesh portion (2) and the recesses (24) form a skin contact surface with alternating concave and convex portions.

Images