Powder metallurgy blade net for rotary shaver
By setting upwardly raised bumps and bent-shaped hair insertion grooves on the knife net of the rotating razor, the problems of low shaving efficiency and insufficient skin safety in the prior art are solved, and more efficient beard cutting and better skin protection are achieved.
Patent Information
- Application Number
- CN202421823425.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing rotary razor knife mesh is inefficient during shaving, the beard is easily overwhelmed or bounced up and the skin is easily cut and damaged.
A powder metallurgical knife mesh is used, with several upwardly raised convex points on the mesh top, and the inlet groove is curved. Combined with the convex points on the mesh strips, it improves the cutting efficiency of the beard and enhances skin safety.
It improves shaving efficiency, reduces the situation where the beard is overwhelmed or bounced up and is not clean, enhances the safety of the skin, and avoids being deeply squeezed into the hair groove and being cut and injured.
Smart Images
Figure CN222920589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a powder metallurgy cutter net for a rotary shaver.
Background Art
[0002] The cutter net of the existing rotary shaver is usually a stamping cutter net, that is, a blank with the shape of the cutter net is punched out from a metal plate by stamping, and then corresponding hair inlet grooves are processed on the blank, and the hair inlet grooves are separated by mesh strips. Therefore, for the cutter net of the rotary shaver on the market at present, the top surface in contact with the skin is usually flat, or a slightly arched spherical or arc-shaped structure. When shaving, the skin generally adheres to the entire top surface of the cutter net. Most of the beards in the mesh strip area are pressed down by the mesh strips. The cutter net moves on the skin, and the mesh strips constantly press down the beards. The pressed beards will bounce up when entering the hair inlet groove area. And many times, because it takes a certain time for the beards to bounce up and the shaver is moving, some beards are cut before they bounce up in the hair inlet groove and have already moved to the outside of the hair inlet groove and are pressed down again. In addition, some beards will also bounce up to a certain extent and are cut, but not cleanly, thus affecting the shaving efficiency. Therefore, at present, shaving needs to be repeated many times on the same area to shave cleanly.
[0003] In addition, the top of the mesh strip is very smooth and basically flat and consistent. The skin is blocked by the mesh strip. When shaving, part of the skin arches in the hair inlet groove, and the top of the cutter net presses on the skin and moves, which is easy to increase the depth of the skin squeezed into the hair inlet groove, so that it is squeezed into the shaving track and cut by the internal moving cutter. Therefore, the thickness of the material at the top of the mesh at the shaving track cannot be made very thin, or the width of the hair inlet groove has to be made very small to ensure the safety of cutting. And the thickness of the material at the top of the mesh at the shaving track is related to the shaving cleanliness, and the width of the hair inlet groove is related to the hair inlet efficiency.
[0004] The present utility model is made based on this situation.
Content of the Utility Model
[0005] The technical problem to be solved by the present utility model is to provide a powder metallurgy cutter net for a rotary shaver, which has the characteristics of simple structure, good safety and high shaving efficiency.
[0006] The present utility model is realized by the following technical solutions:
[0007] The powder metallurgy cutter net for a rotary shaver includes a rigid cutter net body. A shaving track is provided on the top of the cutter net body. An inlet hair structure communicating with the shaving track from top to bottom is provided on the top of the cutter net corresponding to the shaving track. A plurality of convex points protruding upward above the top surface of the cutter net are provided around the inlet hair structure on the top of the cutter net.
[0008] The powder metallurgy cutter net for a rotary shaver as described above, wherein the bumps and the cutter net body are integrally injection molded by powder metallurgy.
[0009] The powder metallurgy cutter net for a rotary shaver as described above, wherein the height h of the bumps ≤ 0.15 mm and the width d ≤ 0.30 mm.
[0010] The powder metallurgy cutter net for a rotary shaver as described above, wherein the outer surface of the bumps is a hemispherical structure.
[0011] The powder metallurgy cutter net for a rotary shaver as described above, wherein the hair inlet structure includes a hair inlet groove which has a lateral opening, and there are multiple hair inlet grooves arranged circumferentially on the same shaving track, and there are web strips spaced between adjacent hair inlet grooves, and there are several bumps provided on the web strips.
[0012] The powder metallurgy cutter net for a rotary shaver as described above, wherein the material thickness of the web strips is thin at the middle position of the shaving track and gradually becomes thicker towards both sides of the shaving track, and there are bumps provided on the web strips corresponding to the middle position of the shaving track.
[0013] The powder metallurgy cutter net for a rotary shaver as described above, wherein the bumps on adjacent web strips are arranged staggeredly.
[0014] The powder metallurgy cutter net for a rotary shaver as described above, wherein the hair inlet structure further includes hair inlet holes which are closed on all sides, and multiple hair inlet holes are gathered together, and there are bumps provided between the hair inlet holes.
[0015] The powder metallurgy cutter net for a rotary shaver as described above, wherein the hair inlet groove is in a curved shape.
[0016] The powder metallurgy cutter net for a rotary shaver as described above, wherein the hair inlet structure only includes hair inlet holes which are closed on all sides, and multiple hair inlet holes are gathered together, and there are bumps provided between the hair inlet holes.
[0017] The powder metallurgy cutter net for a rotary shaver as described above, wherein the hair inlet structure simultaneously includes a hair inlet groove and hair inlet holes, the hair inlet groove has a lateral opening, the hair inlet holes are closed on all sides, there are multiple hair inlet grooves arranged circumferentially on the same shaving track, the hair inlet holes are elongated holes, there are several hair inlet holes spaced between adjacent hair inlet grooves, and there are several bumps provided between adjacent hair inlet grooves, between adjacent hair inlet grooves and hair inlet holes, and / or between adjacent two hair inlet holes.
[0018] Compared with the prior art, the present utility model has the following advantages:
[0019] 1. The utility model is provided with a plurality of upwardly convex points around the hair inlet structure on the mesh top. When the mesh top presses against the skin, the convex points thereon can lift the skin at the corresponding positions of the convex points upward. During shaving, the mesh top moves while adhering to the skin, and the moving convex points change the shape of the skin, enabling the beard to stand up better at the position where it enters the hair inlet structure and be cut, thereby improving the shaving efficiency.
[0020] 2. The convex points of the utility model and the cutter net body are integrally injection molded by powder metallurgy, with a simple structure and convenient manufacturing.
[0021] 3. The hair inlet groove of the utility model is in a curved shape. In combination with the convex points arranged on the mesh strip, under the combined action of the two, during shaving, the top of the cutter net presses against the skin and moves, and the skin is likely to slide out of the hair inlet groove, avoiding the skin being deeply squeezed into the hair inlet groove and cut when the cutter net presses on the skin and pushes. It has better safety, and at the same time is conducive to widening the hair inlet groove and improving the hair inlet efficiency.
Description of the Drawings
[0022] The following further details the specific embodiments of the utility model with reference to the drawings, where:
[0023] Figure 1 is a top view of an embodiment of the powder metallurgy cutter net for a rotary shaver of the utility model;
[0024] Figure 2 is a structural schematic diagram of an embodiment of the powder metallurgy cutter net for a rotary shaver of the utility model;
[0025] Figure 3 is a cross-sectional view of an embodiment of the powder metallurgy cutter net for a rotary shaver of the utility model along the Figure 1 A - A direction in;
[0026] Figure 4 is a cross-sectional view of an embodiment of the powder metallurgy cutter net for a rotary shaver of the utility model;
[0027] Figure 5 is a top view of another embodiment of the powder metallurgy cutter net for a rotary shaver of the utility model;
[0028] Figure 6 is a structural schematic diagram of an embodiment in which the convex points on two adjacent mesh strips are arranged staggeredly;
[0029] Figure 7 is a structural schematic diagram of an embodiment in which the hair inlet structures are all hair inlet grooves;
[0030] Figure 8 is a structural schematic diagram of an embodiment in which hair inlet holes are arranged between two adjacent hair inlet grooves in a shaving track.
Detailed Implementation Modes
[0031] The present utility model will be further described below in conjunction with the attached drawings:
[0032] As Figures 1 to 8 shown, the powder metallurgy cutter net for a rotary shaver includes a rigid cutter net body 1. A shaving track 6 is provided on the top 20 of the cutter net body 1. A hair inlet structure is provided on the top 20 corresponding to the shaving track 6 and communicates from top to bottom to the shaving track 6. A number of bumps 2 protruding upward above the top surface of the top 20 are provided around the hair inlet structure on the top 20. The bumps have a blocking effect on the skin, reducing the risk of the skin being cut when squeezed into the hair inlet structure. When the top 20 of the cutter net presses against the skin, the bumps 2 thereon can lift the skin at the corresponding positions of the bumps 2 upward. During the shaving process, the top 20 of the cutter net moves while adhering to the skin, and the moving bumps 2 continuously change the state of the skin adhering to the top surface of the top 20, enabling the beard to stand up better and be cut when entering the hair inlet structure, improving the shaving efficiency.
[0033] Preferably, the bump 2 and the cutter net body 1 are integrally injection molded by powder metallurgy, with a simple structure and convenient manufacturing.
[0034] Preferably, the height h of the bump 2 ≤ 0.15 mm, and the width d ≤ 0.30 mm. Preferably, 0.05 mm ≤ h ≤ 0.10 mm, and the width 0.15 ≤ d ≤ 0.20 mm, to avoid the area where the bump 2 lifts the skin being too large, so that the skin cannot adhere well to the top surface of the top 20, thereby affecting the depth of the skin squeezed into the hair inlet structure and affecting the shaving cleanliness.
[0035] Preferably, as Figure 4 shown in the embodiment, the outer surface of the bump 2 is a hemispherical structure.
[0036] Regarding the hair inlet structure, the following are preferred implementation modes:
[0037] As Figure 1 , 2 , 5, 6 and 7 shown in the embodiment, the hair inlet structure includes a hair inlet groove 3. The hair inlet groove 3 has a lateral opening 31. A plurality of hair inlet grooves 3 arranged circumferentially are corresponding to the same shaving track 6. A net strip 30 is provided between adjacent two hair inlet grooves 3. A number of bumps 2 are provided on the net strip 30. The width of the bump 2 is smaller than the width of the net strip 30. When the skin is squeezed into the hair inlet groove 3, the bumps have a blocking effect on the skin, improving safety and being beneficial to increasing the width of the hair inlet groove 3 and improving the hair inlet efficiency.
[0038] As Figures 1 - 4In the illustrated embodiment, the material thickness of the wire mesh 30 is thin at the middle position of the shaving track 6 and gradually thickens towards both sides of the shaving track 6, improving the shaving cleanliness of the middle area of the shaving track 6. At the middle position of the wire mesh 30 corresponding to the shaving track 6, there are raised dots 2, which can strengthen the strength of the weak position in the middle of the wire mesh 30.
[0039] As Figures 5 - 7 shown in the illustrated embodiment, on multiple wire meshes 30, there are more than two raised dots 2 spaced apart on each wire mesh 30.
[0040] As Figure 6 shown in the illustrated embodiment, the raised dots 2 on adjacent wire meshes 30 are staggered to avoid the raised dots 2 between the two wire meshes 30 being too dense.
[0041] Preferably, as Figure 1 、 2 、5, and 6 shown in the illustrated embodiment, the hair inlet groove 3 is in a curved shape. In combination with the raised dots 2 on the wire mesh 30, under their combined action, when shaving, the top of the cutter net presses on the skin and moves, and the skin easily slides out of the hair inlet groove, avoiding the skin being deeply squeezed into the hair inlet groove and cut when the cutter net presses on the skin and pushes. It has better safety, and at the same time, it is beneficial to widen the hair inlet groove 3 to improve the hair inlet efficiency.
[0042] Preferably, as Figure 1 、 2 、5, and 6 shown, the hair inlet structure further includes hair inlet holes 4 that are closed on all sides. A plurality of the hair inlet holes 4 are grouped together, and there are raised dots 2 between the hair inlet holes 4.
[0043] Or the hair inlet structure on the cutter net is only composed of hair inlet holes 4 that are closed on all sides. A plurality of the hair inlet holes 4 are grouped together, and there are raised dots 2 between the hair inlet holes 4. The illustration is omitted here.
[0044] As Figure 8 shown in the illustrated embodiment, the hair inlet structure includes a hair inlet groove 3 and hair inlet holes 4. The hair inlet groove 3 has a lateral opening 31, and the hair inlet holes 4 are closed on all sides. On the same shaving track 6, there are a plurality of hair inlet grooves 3 arranged circumferentially. The hair inlet holes 4 are long holes. There are several hair inlet holes 4 spaced between adjacent two hair inlet grooves 3, and there are several raised dots 2 between adjacent two hair inlet grooves 3 and between adjacent hair inlet grooves 3 and hair inlet holes 4. When there are more than two hair inlet holes 4 spaced between adjacent two hair inlet grooves 3, there are also several raised dots 2 between the adjacent two hair inlet holes 4. The illustration is omitted here.
[0045] For the above powder metallurgy cutter net, the following is an embodiment of the powder metallurgy forming process, including the following steps:
[0046] A. Inject the raw material with stainless steel powder through an injection molding machine to obtain a cutter net blank. The cutter net blank includes a cutter net body 1. The cutter net body 1 has an inner cavity with an opening facing downwards. An incoming hair structure is integrally formed on the net top 20 of the cutter net body 1, and a number of upwardly protruding bumps 2 are integrally formed around the incoming hair structure on the net top 20.
[0047] B. Place the cutter net blank in a degreasing furnace for degreasing.
[0048] C. Place the degreased cutter net blank in a sintering furnace for sintering.
[0049] D. Heat-treat and harden the sintered cutter net blank. Preferably, the heat treatment and hardening make the hardness of the cutter net blank reach above 40 HRC.
[0050] E. Cut off part of the material from the bottom of the net top of the cutter net body 1 to form a shaving track 6 for the rotary motion of the moving cutter teeth, so that the incoming hair structure penetrates from top to bottom to the corresponding shaving track 6.
[0051] The raw material with stainless steel powder is made into granular raw material by mixing stainless steel powder and POM powder evenly and then through a granulator. The mass proportion of POM powder is 5% - 15%. The stainless steel powder can be selected from 440C stainless steel powder or 316 stainless steel powder or 420 stainless steel powder.
Claims
1. A powder metallurgy blade mesh for a rotary shaver, characterized in that: The invention comprises a rigid blade net body (1), wherein a shaving track (6) is arranged on the net top (20) of the blade net body (1), and a hair feeding structure connected to the shaving track (6) from top to bottom is arranged on the net top (20) corresponding to the shaving track (6), and a plurality of protrusions (2) protruding upwards above the top surface of the net top are arranged on the net top (20) around the hair feeding structure.
2. The powder metallurgy blade mesh for a rotary shaver according to claim 1, characterized in that: The convex point (2) and the blade net body (1) are integrally injection molded by powder metallurgy.
3. The powder metallurgy blade mesh for a rotary shaver according to claim 1, characterized in that: The height h of the protrusion (2) is ≤ 0.15 mm, and the width d is ≤ 0.30 mm.
4. The powder metallurgy blade mesh for a rotary shaver according to claim 1, characterized in that: The outer surface of the convex point (2) is a hemispherical structure.
5. The powder metallurgy blade mesh for a rotary shaver according to any one of claims 1 to 4, characterized in that: The hair feeding structure comprises a hair feeding groove (3), wherein the hair feeding groove (3) has a lateral opening (31), and a plurality of hair feeding grooves (3) arranged in a circumferential direction are correspondingly arranged on the same shaving track (6), and a mesh strip (30) is provided between two adjacent hair feeding grooves (3), and a plurality of protrusions (2) are provided on the mesh strip (30).
6. The powder metallurgy blade mesh for a rotary shaver according to claim 5, characterized in that: The material thickness of the mesh strip (30) is thin at a position corresponding to the middle of the shaving track (6), and gradually becomes thicker towards both sides of the shaving track (6). A convex point (2) is provided on the mesh strip (30) at a position corresponding to the middle of the shaving track (6).
7. The powder metallurgy blade mesh for a rotary shaver according to claim 5, characterized in that: The convex points (2) on two adjacent mesh strips (30) are arranged in a staggered manner.
8. The powder metallurgy blade mesh for a rotary shaver according to claim 5, characterized in that: The hair inlet structure also includes hair inlet holes (4) that are closed on all sides, a plurality of the hair inlet holes (4) are gathered together, and convex points (2) are provided between the hair inlet holes (4) and the hair inlet holes (4).
9. The powder metallurgy blade mesh for a rotary shaver according to claim 5, characterized in that: The hair feeding groove (3) is in a curved shape.
10. The powder metallurgy blade mesh for a rotary shaver according to any one of claims 1 to 4, characterized in that: The hair inlet structure comprises hair inlet holes (4) which are closed on all sides, a plurality of the hair inlet holes (4) are assembled together, and convex points (2) are provided between the hair inlet holes (4) and the hair inlet holes (4).
11. The powder metallurgy blade mesh for a rotary shaver according to any one of claims 1 to 4, characterized in that: The hair feeding structure comprises a hair feeding groove (3) and a hair feeding hole (4); the hair feeding groove (3) has a lateral opening (31); the hair feeding hole (4) is closed on all sides; a plurality of hair feeding grooves (3) arranged in a circumferential direction correspond to one and the same shaving track (6); the hair feeding hole (4) is an elongated hole; a plurality of hair feeding holes (4) are spaced between two adjacent hair feeding grooves (3); a plurality of protrusions (2) are provided between two adjacent hair feeding grooves (3), between adjacent hair feeding grooves (3) and hair feeding holes (4), and / or between two adjacent hair feeding holes (4).