Concave-convex razor net of rotary razor
By designing the concave and convex surfaces and multiple convex portions on the knife mesh of the rotating shaver and setting the concave portions in the middle of the shaving track, the problems of skin pulling deformation and material thickness changes during shaving in the prior art are solved, and a more comfortable and effective shaving effect and lower processing difficulty are achieved.
Patent Information
- Application Number
- CN202421315672.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The knife mesh of existing rotating shaver is prone to cause skin to pull and deform during shaving, and the material thickness changes during processing of shaving tracks lead to poor shaving or skin injury.
A concave and convex cutter mesh for rotating shaver is designed, with concave and convex surfaces and multiple convex portions on the convex ring, and a concave portion in the middle of the shaving track. Through these designs, the skin pulling deformation is reduced and the material thickness is optimized to improve the shaving effect.
This design reduces skin pulling deformation during shaving, improves shaving comfort and efficiency, while avoiding skin cutting by optimizing material thickness, increasing processing tolerances and reducing processing difficulty.
Smart Images
Figure CN222627845U_ABST
Abstract
Description
[Technical field]
[0001] The utility model relates to a concave-convex blade net of a rotary shaver. [Background technology]
[0002] The existing rotary shaver blade net has a convex ring on the top of the net. When shaving, the top surface of the convex ring is used as a skin-contacting surface 100 for contacting the skin. The top surface of the convex ring is usually a flat surface or a flat surface. Fig.10 The concave side shown has a smooth curved surface facing downward.
[0003] When shaving, a certain pressure is applied to press the blade net against the skin. Therefore, the skin-contacting surface is basically in contact with the skin in its entirety. In addition, due to the pressure, there is a strong adhesion between the blade net and the skin. This causes a large resistance to the shaver when it moves, and the shaver is prone to pull the skin and cause a large deformation when it moves, reducing the comfort of shaving.
[0004] Another existing rotary shaver blade mesh has a manufacturing tolerance when processing the shaving track. When the shaving track is processed deeper, the material thickness between the skin-contacting surface and the fixed blade surface will become smaller, and when the shaving track is processed shallower, the material thickness between the skin-contacting surface and the fixed blade surface will become larger. Even if the material thickness between the skin-contacting surface and the fixed blade surface changes by 0.01 mm, it may have a significant change in the shaving effect or skin feel. If the material thickness between the skin-contacting surface and the fixed blade surface is thin, it is easy to cut the skin, and the skin is likely to have a tingling sensation after shaving. If the material thickness between the skin-contacting surface and the fixed blade surface is thick, it is easy to shave uncleanly.
[0005] The utility model is made based on this situation. [Utility Model Content]
[0006] The technical problem to be solved by the utility model is to provide a concave-convex blade net of a rotary shaver which has a simple structure, can shave cleanly and can reduce the pulling and deformation of the skin.
[0007] The utility model is realized by the following technical solutions:
[0008] A concave-convex blade net of a rotary shaver comprises a blade net body, the blade net body is provided with an inner cavity, a plurality of annular convex rings are provided on the top of the blade net body, a central positioning column is provided at the bottom of the blade net top, a shaving track surrounding the central positioning column is provided at the bottom of the convex ring, a concave-convex surface is provided on the top of the convex ring, and a hair inlet hole is provided on the convex ring.
[0009] In the above-mentioned concave-convex blade net of a rotary shaver, the concave-convex surface has convex parts and concave parts, and each convex ring is provided with more than two circles of convex parts around the central axis L.
[0010] In the concave-convex blade net of a rotary shaver as described above, a concave portion is correspondingly arranged in the middle of the shaving track.
[0011] Preferably, the inlet holes include a first inlet hole having one end passing through the annular outer side of the convex ring in the transverse direction and the other end being a terminal end, there are multiple first inlet holes and they are arranged around the circumferential direction, a mesh top sheet is provided between two adjacent first inlet holes, the mesh top sheet is provided with a third inlet hole having one end passing through the annular inner side of the convex ring in the transverse direction and the other end being a terminal end, and the mesh top sheet is provided with convex portions on the inner side of the terminal end of the first inlet hole and on the outer side of the terminal end of the third inlet hole respectively.
[0012] Preferably, the inlet holes are strip holes, a mesh strip is provided between two adjacent inlet holes, only one convex portion is provided on the same mesh strip, and between two adjacent mesh strips, the convex portion of one mesh strip is close to the outer end of the mesh strip, and the convex portion of the other mesh strip is close to the inner end of the mesh strip.
[0013] Preferably, the concave-convex surface is a rotation surface around the central axis L of the knife net and is divided by pores.
[0014] In the concave-convex blade net of a rotary shaver as described above, the side wall of the hair inlet hole is formed with a sharp-angled blade.
[0015] In the concave-convex blade net of a rotary shaver as described above, the height difference Δd between adjacent convex portions and concave portions of the concave-convex surface is ≤0.15 mm.
[0016] In the above-mentioned concave-convex blade net of a rotary shaver, the net top, the convex ring and the concave-convex surface thereon and the blade net body are integrally formed by powder metallurgy.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] 1. By providing a concave and convex surface on the convex ring, it is easy to move on the skin surface during shaving, which can reduce the pulling and deformation of the skin. The shaved area can also be massaged before and after shaving to improve the shaving experience.
[0019] 2. A concave portion is correspondingly arranged in the middle of the shaving track. Through the concave-convex surface, the material thickness between the top of the convex ring and the fixed blade surface is thin in the middle of the shaving track to ensure a clean shave, and the thickness at the convex portion is large. The multiple convex portions work together to support the skin and prevent the skin from being cut by squeezing into the shaving track through the pores. Therefore, when processing the shaving track, the material thickness of the middle of the convex ring can be made thinner than that of the existing razor blade mesh. The convex portion can prevent the skin from being cut, thereby increasing the allowable tolerance and reducing the processing difficulty.
Brief Description of the Drawings
[0020] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:
[0021] Figure 1 It is a structural schematic diagram of an embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0022] Figure 2 It is a cross-sectional view of an embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0023] Figure 3 It is a structural schematic diagram of another embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0024] Figure 4 It is a cross-sectional view of another embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0025] Figure 5 It is a top view of an embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0026] Figure 6 It is a top view of another embodiment of a concave-convex blade net of a rotary shaver of the utility model;
[0027] Figure 7 Schematic diagram of an embodiment in which the bottom of the groove in the knife mesh blank is closed;
[0028] Figure 8 Schematic diagram of an embodiment in which the groove in the knife mesh blank is a through hole that passes through from top to bottom and the bottom thereof is not closed;
[0029] Fig. 9 is a schematic cross-sectional view of an inlet pore and its sidewalls;
[0030] Fig.10 It is a cross-sectional view of the existing knife net. [Specific implementation method]
[0031] The utility model is further described below in conjunction with the accompanying drawings:
[0032] like Figures 1 to 6 The concave-convex blade net of a rotary shaver shown in the figure comprises a blade net body 1, the blade net body 1 is provided with an inner cavity 2, a plurality of annular convex rings 3 are provided on the net top 20 of the blade net body 1, a center positioning column 81 is provided at the bottom of the net top 20, a shaving track 6 surrounding the center positioning column 81 is provided at the bottom of the convex ring 3, a concave-convex surface 200 is provided on the top of the convex ring 3, and a hair inlet hole 4a is provided on the convex ring 3.
[0033] When shaving, the concavoconvex surface 200 is easy to move on the skin surface, which can reduce the pulling and deformation of the skin.
[0034] The concavo-convex surface 200 has convex portions 201 and concave portions 202 .
[0035] Preferably, if Figures 1 to 6 In the illustrated embodiment, each of the convex rings 3 is provided with more than two circles of convex portions 201 around the central axis L.
[0036] Preferably, a recess 202 is correspondingly provided in the middle of the shaving track 6. By providing the concave-convex surface 200, the material thickness between the top of the convex ring 3 and the fixed blade surface 5 is thin in the middle of the shaving track 6, thereby ensuring a clean shave. The thickness at the position of the convex portion 201 is large. The joint action of multiple convex portions 201 can support the skin and prevent the skin from being cut by being squeezed into the shaving track 6 through the pores. Therefore, when processing the shaving track 6, the material thickness of the middle of the convex ring 3 can be made thinner than that of the existing razor blade mesh. The skin is prevented from being cut by the action of the convex portion 201, thereby increasing the allowable tolerance and reducing the processing difficulty.
[0037] like Figure 1-4 In the illustrated embodiment, the concave-convex surface 200 is a rotating surface around the central axis L of the blade net and is separated by the inlet pores 4a, and has a simple structure.
[0038] like Figure 5 In the illustrated embodiment, the inlet holes 4a are strip-shaped holes, a mesh strip 30 is provided between two adjacent inlet holes 4a, only one convex portion 201 is provided on the same mesh strip 30, and between two adjacent mesh strips 30, the convex portion 201 of one mesh strip 30 is close to the outer end of the mesh strip 30, and the convex portion 201 of the other mesh strip 30 is close to the inner end of the mesh strip 30.
[0039] Or Figure 6 In the illustrated embodiment, the inlet hole 4a includes a first inlet hole 4a1 having one end extending through the annular outer side of the convex ring 3 in the transverse direction and the other end being a terminal end, there are a plurality of first inlet holes 4a1 and they are arranged around the circumferential direction, a mesh top sheet 311 is provided between two adjacent first inlet holes 4a1, and a third inlet hole 4a3 is provided on the mesh top sheet 311, having one end extending through the annular inner side of the convex ring 3 in the transverse direction and the other end being a terminal end, and the mesh top sheet 311 is provided with protrusions 201 on the inner side of the terminal end of the first inlet hole 4a1 and on the outer side of the terminal end of the third inlet hole 4a3, respectively.
[0040] exist Figure 5 and Figure 6 In the illustrated embodiment, three adjacent protrusions 201 form a triangular structure surrounding the middle area of the protruding ring 3, so as to prevent the skin from squeezing into the shaving track 6 while making the area with thin material thickness between the top of the protruding ring 3 and the fixed blade surface 5 large, thereby improving the efficiency of shaving.
[0041] Furthermore, the height difference Δd≤0.15mm between adjacent convex portions 201 and concave portions 202 of the concave-convex surface 200 is preferably between 0.05mm≤Δd≤0.1mm, so that it is easy to move on the skin surface and prevent the skin from squeezing into the shaving track 6, while effectively ensuring the cleanness of the shaving.
[0042] Furthermore, if Fig. 9 As shown, the side wall of the inlet hole 4a is formed with an acute-angled blade 4b with good sharpness.
[0043] Furthermore, the mesh top 20, the convex ring 3 and the concave-convex surface 200 thereon and the knife mesh body 1 are integrally formed by powder metallurgy, and have a simple structure, which is conducive to mass production and improved production efficiency.
[0044] The following is an embodiment of a powder metallurgy forming process, comprising the following steps:
[0045] A. A raw material having stainless steel powder is injection molded by an injection molding machine to obtain a knife net blank, wherein the knife net blank comprises a knife net body 1, wherein the knife net body 1 has an inner cavity 2 with an opening facing downward, wherein a convex ring 3 and a concave-convex surface 200 are integrally formed on the mesh top of the knife net body 1, wherein a plurality of downwardly concave grooves 4 are integrally formed on the mesh top of the knife net body 1, wherein the groove 4 has a groove wall inclined upward and outward, and a chamfered corner R is formed between the groove wall and the top surface of the mesh top of the knife net body 1;
[0046] B. Put the knife mesh blank into the degreasing furnace for degreasing;
[0047] C. Put the degreased knife mesh blank into the sintering furnace for sintering;
[0048] D. heat-treating and hardening the sintered blade mesh blank. Preferably, the heat-treating and hardening process makes the hardness of the blade mesh blank reach 40HRC or above;
[0049] E. Part of the material is cut off from the bottom of the mesh top of the blade mesh body 1 to form a fixed blade surface 5. At the same time, a hair inlet hole 4a that is connected to each other from top to bottom is formed at the groove 4, and a blade edge 4b with an acute angle is formed on the side wall of the hair inlet hole 4a. A shaving track 6 is formed below the fixed blade surface 5 for the movable blade teeth to rotate.
[0050] In one embodiment, a raw material having stainless steel powder is prepared by mixing stainless steel powder and POM powder evenly and then manufacturing the mixed raw material into granules through a granulator, wherein the mass proportion of POM powder is 5% to 15%; the stainless steel powder can be selected from 440C stainless steel powder or 316 stainless steel powder or 420 stainless steel powder, 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 20μm, such as 3μm to 8μm.
[0051] Preferably, after the knife mesh blank is sintered, it can be shaped by a shaping mold and then heat treated so that the obtained knife mesh blank is closer to the design requirements. The shaped part can be only the positioning structure on the knife mesh blank used for cooperating with the outside for positioning, or the entire knife mesh blank can be shaped. When the entire knife mesh blank needs to be shaped, the shaping mold is designed according to the designed contour of the knife mesh blank.
[0052] 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 knife mesh blank at high temperature and remove it, and the degreasing time is 6h to 10h.
[0053] Preferably, the sintering time in step C is 20h to 30h, wherein the maximum sintering temperature t is set between 1200°C and 1400°C, and preferably, the temperature is kept for 2-5h 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 3-8h, sintering from 900°C to 1200°C for 2-6h, sintering from 1200°C to 1400°C for 2-5h, sintering from 1200°C to 1000°C for 0.5-5h, and sintering from 1000°C to room temperature for 8-15h. Of course, the sintering temperature range and sintering time can also be other set values.
[0054] Preferably, the heat treatment in step D is first quenching to make the hardness of the knife net blank reach 52HRC±3HRC, and then tempering to 45HRC±3HRC, which is conducive to processing and forming the knife net and making the structure of the obtained knife net stable.
[0055] Preferably, in the above step A, Figure 7 As shown, the bottom of the groove 4 is closed. In step C, the knife mesh blank obtained after sintering has a material thickness T1 of the closed part of the bottom of the groove 4 ≥ 0.2 mm, which is conducive to injection molding of the groove 4. The depth T2 of the groove 4 is ≥ 0.2 mm, which is conducive to processing the pores 4a while ensuring the thickness between the fixed knife surface 5 and the top surface of the mesh top. Figure 7 As shown by the dotted line L1, material is cut from the bottom of the mesh top of the knife mesh body 1 to the position L1, and the position L1 is located above the bottom of the groove 4, so that the groove is connected from top to bottom to form the pores.
[0056] Of course, you can also Figure 8 As shown, the groove 4 can also pass through the top of the net from top to bottom, and the bottom is not closed.
Claims
1. A concave-convex blade net of a rotary shaver, characterized in that: The invention comprises a blade net body (1), wherein the blade net body (1) is provided with an inner cavity (2), a plurality of annular convex rings (3) are provided on the net top (20) of the blade net body (1), a central positioning column (81) is provided at the bottom of the net top (20), a shaving track (6) surrounding the central positioning column (81) is provided at the bottom of the convex ring (3), a concave-convex surface (200) is provided on the top of the convex ring (3), and a hair inlet hole (4a) is provided on the convex ring (3).
2. The concave-convex blade net of a rotary shaver according to claim 1, characterized in that: The concave-convex surface (200) has a convex portion (201) and a concave portion (202), and each convex ring (3) is provided with more than two circles of convex portions (201) around the central axis L.
3. The concave-convex blade net of a rotary shaver according to claim 2, characterized in that: A recess (202) is correspondingly arranged in the middle of the shaving track (6).
4. The concave-convex blade net of a rotary shaver according to claim 2, characterized in that: The hair inlet holes (4a) include a first hair inlet hole (4a1) having one end that passes through the annular outer side of the convex ring (3) in the transverse direction and the other end that is a terminal end, a plurality of the first hair inlet holes (4a1) are arranged in a circumferential direction, a mesh top sheet (311) is provided between two adjacent first hair inlet holes (4a1), the mesh top sheet (311) is provided with a third hair inlet hole (4a3) having one end that passes through the annular inner side of the convex ring (3) in the transverse direction and the other end that is a terminal end, and the mesh top sheet (311) is provided with convex portions (201) on the inner side of the terminal end of the first hair inlet hole (4a1) and on the outer side of the terminal end of the third hair inlet hole (4a3), respectively.
5. The concave-convex blade net of a rotary shaver according to claim 2, characterized in that: The wool inlet holes (4a) are strip-shaped holes, a mesh strip (30) is provided between two adjacent wool inlet holes (4a), only one convex portion (201) is provided on the same mesh strip (30), and between two adjacent mesh strips (30), the convex portion (201) of one mesh strip (30) is close to the outer end of the mesh strip (30), and the convex portion (201) of the other mesh strip (30) is close to the inner end of the mesh strip (30).
6. A concave-convex blade net of a rotary shaver according to any one of claims 1 to 4, characterized in that: The concave-convex surface (200) is a rotation surface around the central axis L of the knife net and is divided by the inlet holes (4a).
7. A concave-convex blade net of a rotary shaver according to any one of claims 1 to 4, characterized in that: The side wall of the inlet hole (4a) is formed with an acute-angled blade (4b).
8. A concave-convex blade net of a rotary shaver according to any one of claims 1 to 4, characterized in that: The height difference Δd between adjacent convex portions (201) and concave portions (202) of the concave-convex surface (200) is ≤0.15 mm.
9. A concave-convex blade net of a rotary shaver according to any one of claims 1 to 5, characterized in that: The mesh top (20), the convex ring (3) and the concave-convex surface (200) thereon, and the knife mesh body (1) are integrally formed by powder metallurgy.