Knife net blank of rotary shaver

Abstract

The utility model discloses a razor net blank of rotary shaver, including the razor net body, the razor net body has the inner cavity of opening downward, the net top of razor net body is provided with a plurality of recess that recess downward to be used as the pore inlet, the recess and razor net body are formed integrally by powder metallurgy, its simple structure is easy to produce and manufacture, and the razor net blank of rotary shaver is suitable for use in the razor, and the razor net blank of rotary shaver. The processing technology of the pores is simplified, the processing cost of the knife net is reduced, and the processing efficiency of the pores is improved.

Description

Technical Field

[0001] The utility model relates to a cutter net blank of a rotary shaver.

Background Art

[0002] At present, the cutter nets of rotary shavers on the market are usually formed by stamping, and then the beard inlet grooves are cut on the cutter nets by a grinding wheel. Their structures and functions are relatively single, only meeting the basic shaving requirements. However, with the improvement of people's living standards, consumers are more and more concerned about the experience and feeling of shaving products. At present, the industry improves the performance and use feeling of the whole shaver by updating and installing new functions on the main body of the shaver, such as adding LED display, adding infrared rays, etc. However, the most crucial function of the shaver is still shaving, and it is very difficult to have new innovations and breakthroughs in the cutting assembly composed of the cutter net and the moving blade.

[0003] In order to improve the product performance, our company has newly developed a cutter net formed by powder metallurgy, enabling the cutter net to have more structural innovations and function improvements. During the production process, the metal powder is first formed into a cutter net blank through a mold, and the cutter net blank is degreased, sintered and heat-treated. Finally, the top of the cutter net blank needs to be ground thin to grind out the shaving track, so that the beard inlet pores penetrate up and down to the shaving track. For the grinding process, the structure of the cutter net blank has a great influence on the grinding process and also affects the performance of the cutter net after grinding.

[0004] The present utility model is made based on the above situation.

Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to provide a cutter net blank of a rotary shaver, which has a simple structure, is easy to produce and manufacture, is beneficial to simplifying the processing technology of the beard inlet pores and reducing the processing cost of the cutter net, and improving the processing efficiency of the beard inlet pores.

[0006] To solve the above technical problem, a cutter net blank of a rotary shaver of the present utility model includes a cutter net body. The cutter net body has an inner cavity with an opening facing downwards. A plurality of grooves that are recessed downwards are provided on the net top of the cutter net body and are used as beard inlet pores. The grooves and the cutter net body are integrally formed by powder metallurgy.

[0007] For a cutter net blank of a rotary shaver as described above, several of the grooves communicate downwards to the inner cavity.

[0008] For a cutter net blank of a rotary shaver as described above, a plurality of concave rings that are recessed upwards and surround the central axis L are provided at the bottom of the net top, and several grooves that communicate downwards to the concave rings are correspondingly provided on each of the concave rings.

[0009] A cutter net blank of a rotary shaver as described above. For the structure of the groove, in a preferred embodiment, a closed portion is provided corresponding to the concave ring in the middle and lower parts of the net top. The width of the closed portion in the radial direction of the cutter net blank is smaller than the width of the concave ring. For the groove that penetrates downward into the concave ring, the closed portion closes a part of the groove from below, so that the bottom part of the groove is closed and part of it penetrates downward into the concave ring.

[0010] Further, the closed portion protrudes downward into the concave ring or is flush with the concave ring.

[0011] A cutter net blank of a rotary shaver as described above. Each of the grooves communicates downward into the concave ring.

[0012] For the structure of the groove, in another preferred embodiment, the groove is a strip-shaped groove. The grooves on the concave ring are distributed circumferentially. A plurality of the grooves communicate downward into the concave ring, and a plurality of the grooves are closed at the bottom and do not communicate downward into the concave ring. The grooves that communicate into the concave ring and the grooves that do not communicate into the concave ring are distributed alternately.

[0013] A cutter net blank of a rotary shaver as described above. A plurality of downwardly protruding spacer bars are provided at the bottom of the net top. The spacer bars divide the space below the bottom of the net top into inner and outer different concave rings.

[0014] A cutter net blank of a rotary shaver as described above. For the sintered cutter net blank, the material thickness T1 of the closed part at the bottom of the groove ≥ 0.2 mm, and above the bottom closed part, the depth T2 of the groove ≥ 0.2 mm.

[0015] A cutter net blank of a rotary shaver as described above. A fillet R is formed between the groove wall of the groove and the top surface of the net top of the cutter net body.

[0016] A cutter net blank of a rotary shaver as described above. For the sintered cutter net blank, the radius r of the fillet R satisfies 0.05 mm ≤ r ≤ 0.10 mm.

[0017] A cutter net blank of a rotary shaver as described above. The groove wall of the groove is inclined upward and outward.

[0018] A cutter net blank of a rotary shaver as described above. For the structure of the net top, in a preferred embodiment, a plurality of upward convex rings are provided on the net top of the cutter net body. The grooves are provided on the convex rings. An inner top is provided inside the net top surrounded by the innermost convex ring. A central positioning post is provided along the central axis L at the bottom of the inner top.

[0019] A cutter net blank of a rotary shaver as described above, the top end of the central positioning post is closed, and a sunken gate groove is arranged above the central positioning post on the inner top.

[0020] A cutter net blank of a rotary shaver as described above, a flanging facing outward is provided at the lower end of the cutter net body, and a plurality of gates are arranged on the side surface of the flanging in the circumferential direction.

[0021] A cutter net blank of a rotary shaver as described above, a plurality of the grooves penetrate through the annular outer side and / or the annular inner side of the convex ring in the transverse direction, and the groove bottom at the annular outer side and / or the annular inner side of the convex ring inclines downward toward the middle of the convex ring.

[0022] A cutter net blank of a rotary shaver as described above, a plurality of the grooves penetrate through the annular outer side and / or the annular inner side of the convex ring in the transverse direction, and chamfers facing outward are arranged at the positions where the grooves penetrate through the annular outer side and / or the annular inner side of the convex ring.

[0023] A cutter net blank of a rotary shaver as described above, a plurality of upward convex rings are arranged on the net top of the cutter net body, and one or more concave rings correspond to the bottom of each convex ring.

[0024] For the structure of the net top, in another preferred embodiment, the net top of the cutter net body is an integral plane or curved surface, a central positioning post is arranged along the central axis L at the bottom of the net top, and the grooves are arranged around the outside of the central positioning post.

[0025] A cutter net blank of a rotary shaver as described above, comb teeth are integrally injection-molded on the cutter net body, and the comb teeth protrude laterally outside the cutter net body.

[0026] A cutter net blank of a rotary shaver as described above, the shape of the cutter net body is a circular or polygonal structure, or a petal-shaped structure.

[0027] A cutter net blank of a rotary shaver as described above, in the area where the grooves are distributed, the thickness d between the top surface and the bottom surface of the net top is not less than 0.3 mm.

[0028] A cutter net blank of a rotary shaver as described above, the grooves and the cutter net body are integrally injection-molded by powder metallurgy.

[0029] Compared with the prior art, the utility model has the following advantages:

[0030] 1. The cutter net blank of the rotary shaver of the present utility model, wherein the cutter net body and the grooves are integrally formed by powder metallurgy, which is beneficial to simplifying the processing technology of the pores and reducing the processing cost of the cutter net, improving the processing efficiency of the pores, and the shapes of the cutter net body and the grooves can be flexibly changed, thus being beneficial to improving the performance of the cutter net and the cutting assembly including the cutter net.

[0031] 2. The cutter net blank of the rotary shaver of the present utility model, several of the grooves communicate downward to the inner cavity, enabling the inner cavity to conduct fluid exchange with the outside through the grooves, so that during the subsequent process of thinning the area where the grooves are located, it is convenient for the solution to enter and exit the inner cavity. Since water, grinding fluid or electrolyte and other related liquids are usually used to assist processing during the thinning process, and the grooves that communicate inside and outside are beneficial to taking away the substances generated in the processing area during the thinning process, improving the processing efficiency.

[0032] 3. The concave ring of the present utility model is used as a processing area for thinning to form an annular shaving track, and several grooves corresponding to each concave ring communicate downward into the concave ring, which is beneficial to the solution in each concave ring flowing out to the outside during the thinning process, taking away the substances generated in the concave ring during processing, and improving the processing efficiency.

[0033] 4. For the grooves that penetrate downward into the concave ring of the present utility model, the closing part closes a part of the groove from below, making the bottom part of the groove closed and part of it penetrate downward into the concave ring, which is beneficial to the flow of substances during injection molding and makes the grooves and the mesh strips between adjacent two grooves better formed. Further, each of the grooves communicates downward into the concave ring, which is beneficial to timely flowing out and taking away the substances generated in the concave ring during processing, and is also beneficial to reducing the solid area that needs to be cut, improving the processing efficiency.

[0034] 5. The grooves of the present utility model are strip-shaped grooves, several of which communicate downward into the concave ring, and several of the grooves are closed at the bottom and do not communicate downward into the concave ring. The grooves that communicate into the concave ring and the grooves that do not communicate into the concave ring are staggered, so that the bottom of one groove is closed between adjacent two grooves, making there be a relatively wide solid material between the two grooves, which is beneficial to the flow of substances during injection molding and is also beneficial to timely flowing out and taking away the substances generated in the concave ring during processing.

[0035] 6. The utility model is formed by powder metallurgy, which is conducive to forming a rounded corner at the upper port of the groove. On the one hand, it improves the skin feeling. On the other hand, after thinning the bottom of the groove to form an inlet pore, the rounded corner increases the inlet area at the top of the inlet pore. Compared with the traditional knife net, in the knife net area of the same area, its effective hair inlet area is greatly improved, which can improve the hair inlet and shaving efficiency. At the same time, in the powder metallurgy forming process, the side wall of the groove can be inclined upward and outward, so that the formed inlet pore forms a sharp blade at the lower edge of its side wall, improving the sharpness of cutting.

[0036] 7. The knife net blank of the utility model can integrally form a groove during powder metallurgy forming, and after processing, the groove is used as an inlet pore. The shape of the groove, that is, the corresponding inlet pore, can be a regular circle, a regular straight line, or other irregular shapes, which is conducive to meeting different functional requirements. Moreover, the knife net body and all the grooves on it can be formed at one time, and only the area of the groove needs to be thinned at the bottom of the net top. Therefore, it avoids the limitations of the traditional manufacturing processes of existing grinding wheel grooving and stamping punching on the repeated processing of the knife net and the inability to flexibly cut different-shaped inlet pores, and the shape of the inlet pore can be flexibly designed. And it avoids the limitation of the existing grinding wheel grooving process on the circular shape of the knife net body. Since the utility model does not need to rotate at each angle for grooving, the knife net body can be flexibly designed into different shapes, which can meet different design and functional requirements.

[0037] 8. The knife net blank of the rotary shaver of the utility model can integrally form comb teeth during powder metallurgy forming. The process is simple and easy to produce and form. The comb teeth protrude laterally outside the knife net body, which can hook the hair and guide it into the first inlet pore for cutting, so that the shaver with this knife net can shave short beards while also shaving long beards or long hairs.

Description of the Drawings

[0038] The following further details the specific embodiments of the utility model in conjunction with the drawings, where:

[0039] Figure 1 is a schematic structural diagram of an embodiment of the knife net blank of a rotary shaver of the utility model;

[0040] Figure 2 is a top view of an embodiment of the knife net blank of a rotary shaver of the utility model;

[0041] Figure 3 is a sectional view of an embodiment of the knife net blank of a rotary shaver of the utility model along Figure 2 the A-A direction in;

[0042] Figure 4 is an embodiment where the groove in the knife net blank penetrates the convex ring up and down along Figure 2Cross-sectional view in the B-B direction;

[0043] Figure 5 It is a cross-sectional view of an embodiment of a groove in a cutter net blank where the groove penetrates the convex ring up and down;

[0044] Figure 6 It is the bottom view of another embodiment of a cutter net blank of a rotary shaver of the present invention;

[0045] Figure 7 It is Figure 6 The top view of the embodiment;

[0046] Figure 8 It is along Figure 7 Cross-sectional view in the C-C direction in;

[0047] Figure 9 It is the bottom view of another embodiment of a cutter net blank of a rotary shaver of the present invention;

[0048] Figure 10 is along Figure 9 Cross-sectional view in the D-D direction in;

[0049] Figures 11 - 12 It is a structural schematic diagram of an embodiment where several grooves communicate downward into the concave ring while the bottoms of several grooves are closed and do not communicate downward into the concave ring;

[0050] Figure 13 It is a cross-sectional view of an embodiment where the bottom of the groove in the cutter net blank is closed along Figure 2 Cross-sectional view in the B-B direction in;

[0051] Figure 14 It is a cross-sectional view of an embodiment of a groove where the bottom of the groove in the cutter net blank is closed;

[0052] Figure 15 It is the top view of an embodiment of a cutter net blank of a rotary shaver of the present invention having a bracket-shaped groove;

[0053] Figure 16 It is a schematic diagram of an embodiment where the groove is a straight slot in the shape of a straight line;

[0054] Figure 17 It is a schematic diagram of an embodiment where the inlet pores or grooves are wavy;

[0055] Figure 18 It is a schematic diagram of an embodiment of a cutter net blank of a rotary shaver of the present invention having a C-shaped groove;

[0056] Figure 19 It is a schematic diagram of an embodiment where the groove has a chamfer at its lateral opening and the chamfer is a rounded chamfer;

[0057] Figure 20Schematic diagram of an embodiment with a circular groove on the same convex ring;

[0058] Figure 21 Stereogram of an embodiment in which comb teeth are provided on the outer side of the cutter net body;

[0059] Figure 22 It is after the cutter net blank is thinned by cutting off some materials at the net top and along Figure 2 Cross-sectional view in the A-A direction in;

[0060] Figure 23 It is after the cutter net blank is thinned by cutting off some materials at the net top and along Figure 2 Cross-sectional view in the B-B direction in;

[0061] Figure 24 Cross-sectional view of the pore inlet formed by cutting off some materials at the bottom of the groove;

[0062] Figure 25 Schematic diagram of an embodiment in which the cutter net blank of a rotary shaver of the present invention has three convex rings;

[0063] Figure 26 Schematic diagram of an embodiment in which the cutter net blank of a rotary shaver of the present invention has one convex ring;

[0064] Figure 27 Schematic diagram of an embodiment in which no convex ring is provided on the net top of the cutter net body;

[0065] Figure 28 Schematic diagram of an embodiment in which the shape of the cutter net body is a polygonal structure;

[0066] Figure 29 Schematic diagram of an embodiment in which the shape of the cutter net body is a multi-segment arc structure.

Detailed implementation manners

[0067] The present invention will be further described below in conjunction with the accompanying drawings:

[0068] A cutter net blank of a rotary shaver includes a cutter net body 1. The cutter net body 1 has an inner cavity 2 with an opening facing downwards. A plurality of grooves 4 that are recessed downwards and used as pore inlets are provided on the net top 20 of the cutter net body 1. The grooves 4 and the cutter net body 1 are integrally formed by powder metallurgy, which is beneficial to simplifying the processing technology of the pore inlets, reducing the processing cost of the cutter net, improving the processing efficiency of the pore inlets, and moreover, the shape of the cutter net body and the shape of the grooves can be flexibly changed, thereby being beneficial to improving the performance of the cutter net and the cutting assembly including the cutter net.

[0069] Since powder metallurgy forming requires a certain material thickness to ensure the stability of forming, while shaving requires a relatively thin material thickness to make the hair roots remaining after shaving as short as possible to ensure the shaving cleanliness. Therefore, when producing the cutter grid, it is also necessary to shave off some materials from the top 20 of the cutter grid blank from its bottom to make the area where the groove 4 is located thinner. For example, the material thickness H at the thinnest position is between 0.08 mm and 0.15 mm. After thinning, the corresponding upper and lower parts of the groove communicate with each other as the hair inlet pores for hair to enter.

[0070] Preferably, within the area where the groove 4 is distributed, the thickness d between the top surface and the bottom surface of the top 20 is not less than 0.3 mm, preferably 0.4 mm ≤ d ≤ 0.7 mm, which is beneficial to the forming of the cutter grid blank, and at the same time avoids increasing the difficulty and processing time of the thinning process due to being too thick. The material thickness T of the side wall of the inner cavity 2 on the cutter grid body 1 ≥ 0.4 mm. In one embodiment, T = 0.5 mm and d = 0.5 mm are taken.

[0071] Preferably, the groove 4 and the cutter grid body 1 are integrally injection-molded by powder metallurgy. In powder metallurgy forming, the injection molding process is adopted, which is beneficial to maintaining the stability of the size and shape of the groove. After the cutter grid blank is processed into a cutter grid, the corresponding groove serves as the hair inlet pore, and the size and shape of the hair inlet pore are stable, which is beneficial to improving the safety and stability of shaving, avoiding skin cuts caused by too large hair inlet pores, avoiding low hair inlet efficiency due to too small hair inlet pores, and avoiding reduced cutting performance due to deformation of the hair inlet pores.

[0072] As a powder metallurgy forming process for the cutter grid blank, it includes the following steps:

[0073] A. Inject the raw material with stainless steel powder through an injection molding machine to obtain the cutter grid blank. As Figures 1 to 21 shown, the cutter grid blank includes a cutter grid body 1, the cutter grid body 1 has an inner cavity 2 with an opening facing downwards, and a plurality of downwardly concave grooves 4 are integrally formed on the top of the cutter grid body 1. Preferably, as Figure 5 and Figure 14 shown, the groove 4 has a groove wall 40 that is inclined upwards and outwards. Preferably, a fillet R is formed between the groove wall 40 and the top surface 31 of the top of the cutter grid body 1;

[0074] B. Put the cutter grid blank into a degreasing furnace for degreasing;

[0075] C. Put the degreased cutter grid blank into a sintering furnace for sintering;

[0076] D. Heat-treat and harden the sintered cutter grid blank. Preferably, the heat treatment and hardening make the hardness of the cutter grid blank reach above 40 HRC.

[0077] When manufacturing the cutter grid through the above-mentioned cutter grid blank, part of the material is shaved off from the bottom of the grid top of the cutter grid body 1 to form a fixed cutter surface 5. At the same time, a through-hole 4a is formed at the groove 4, and a blade 4b with an acute angle is formed on the side wall of the through-hole 4a. A shaving track 6 for the rotation of the moving cutter teeth is formed below the fixed cutter surface 5, as Figures 22 to 27 shown.

[0078] In one embodiment, the raw material has stainless steel powder. The stainless steel powder and POM powder are mixed evenly and then made into granular raw material by a granulator, where the mass ratio of POM powder is 5% - 15%. Preferably, the stainless steel powder is 440C stainless steel powder or 316 stainless steel powder or 420 stainless steel powder.

[0079] Preferably, in step B, the degreasing temperature is 100°C - 150°C. Oxalic acid is introduced into the degreasing furnace to vaporize and remove the POM material in the cutter grid blank at high temperature. In step C, the maximum sintering temperature is between 1200°C and 1400°C. In step D, the heat treatment is to quench first to make the hardness of the cutter grid blank reach 52HRC ± 3HRC, and then temper to 45HRC ± 3HRC, which is beneficial for the cutter grid blank to be processed into a cutter grid and makes the structure of the obtained cutter grid stable.

[0080] Through powder metallurgy, the cutter grid blank can be injection molded in batches. The cutter grid blank is integrally formed with grooves and can be successively placed in the degreasing furnace and sintering furnace for processing in batches, and batch heat treatment. Subsequently, only part of the material needs to be shaved off from the bottom of the grid top of the cutter grid body 1, and the material can be quickly shaved off by processing methods such as turning, milling or grinding, making the production process of the cutter grid simple, with high production efficiency, easy for batch production, and beneficial for reducing the development and production costs.

[0081] For the obtained rotary shaver cutter grid, the side wall of the through-hole 4a inclines outward, and there is a rounded corner R between the side wall and the top surface 31 of the through-hole. At the same time, the entrance of the through-hole 4a at the top becomes significantly larger, which is easy to introduce hair and improve the hair intake and cutting efficiency. Preferably, for the sintered cutter grid blank, the radius r of the rounded corner R satisfies 0.05mm ≤ r ≤ 0.10mm, and the rounded corner R can also improve the skin feeling during shaving.

[0082] The upward and outward inclined groove wall 40 can make the side wall of the through-hole 4a form a blade 4b with an acute angle after the fixed cutter surface 5 is processed, improving the sharpness of cutting, reducing the occurrence of hair pulling, and being beneficial for the moving cutter to reduce its rotation speed and reduce the noise during shaving.

[0083] For the cutter grid blank formed by powder metallurgy, the shape of the projection of the groove 4 from the top down can be flexibly changed according to needs. It can be a regular circle, such as Figure 20The circular groove located in the middle in the embodiment; it can also be a regular straight groove with both ends open, such as Figure 16 shown; it can also be other irregularly shaped special-shaped grooves, such as Figure 1 , 2 , 7, 15, 17 to Figure 21 the shape of the embodiment shown, so as to meet different functional requirements and avoid the limitations of the existing grinding wheel grooving and stamping punching processes on the knife net structure.

[0084] Such as Figure 1 , 2 , 6, 7, 9, 11, 15, 18 to Figure 21 shown, the shape of the knife net body 1 can be either circular or Figure 28 the polygonal structure shown, or a structure composed of multiple arcs, such as Figure 29 the petal-shaped structure shown, and other required shapes. The knife net blank of the present utility model breaks through the limitations of the existing circular knife net, and the shape of the knife net body 1 can be flexibly designed into different shapes to meet different structural and functional requirements.

[0085] Preferably, as Figures 1 to 13 , 15, 18 to 23 shown, a plurality of upward convex rings 3 are provided on the mesh top of the knife net body 1, and the groove 4 is arranged on the convex ring 3. An inner top 8 is provided on the inner side of the top of the knife net blank surrounded by the innermost convex ring 3, and a central positioning column 81 is arranged along the central axis L at the bottom of the inner top 8. The central positioning column 81 is used for central positioning of the moving knife rotating relative to it to improve the stability of the moving knife rotation. Of course, as Figure 27 shown, the convex ring may not be provided on the mesh top of the knife net body 1. The mesh top 20 of the knife net body 1 is an integral plane or curved surface. The central positioning column 81 is arranged along the central axis L at the bottom of the mesh top 20, and the groove 4 surrounds the outside of the central positioning column 81. The top surface of the mesh top is an integral plane or curved surface to improve the skin feeling.

[0086] Through the above powder metallurgy process, a double-ring knife net with two convex rings can be manufactured, such as Figure 1 shown, and a single-ring knife net with only one convex ring can also be manufactured, such as Figure 26 shown, and a multi-ring knife net with three or more rings can also be manufactured, such as Figure 25 shown. When there are more than two convex rings, through the above powder metallurgy process, the groove 4 on each convex ring can be effectively prevented from being affected by other convex rings during production and manufacturing.

[0087] For the groove 4 on the same knife net or the same convex ring 3, it can be a groove 4 of the same shape, such as Figure 15 shown; it can also be a combination of grooves 4 of different shapes, such as Figure 1 ,2 and Figures 18 to 21 as shown. The groove 4 can be a wavy, C-shaped, bracket-shaped, water droplet-shaped, oval-shaped, olive-shaped or polygonal groove.

[0088] Preferably, as shown in Figure 1 , 3 , 8, 10a, 10b, 25, 26, the top end of the central positioning post 81 is closed, and a sunken gate groove 82 is provided above the central positioning post 81 on the top of the inner top 8. The gate groove 82 is used for injecting glue during injection molding, so that the knife net blank can be better injection molded. The concave inner top 8 is used for installing the decorative sheet and covering the sunken gate groove 82.

[0089] Furthermore, as shown in Figure 1 , a flanging 11 facing outward is provided at the lower end of the knife net body 1, and a plurality of gates 111 are provided on the side surface of the flanging 11 in the circumferential direction. The gates 111 are used for injecting glue during injection molding. By injecting glue simultaneously at multiple positions, better filling can be achieved and the molding stability can be improved.

[0090] Preferably, as shown in the embodiments of Figure 8 and Figure 11 , when the groove 4 penetrates the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 in the transverse direction, the groove bottom 401 of the groove 4 at the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 inclines downward toward the middle of the convex ring 3, which is beneficial to avoiding the formation of a sharp corner structure on the side of the shaving track 6 after the knife net is processed. When the beard slides out from the inlet pore, the sharp corner structure is likely to interact with the uncut beard and cause beard pulling.

[0091] Preferably, a plurality of the grooves 4 penetrate the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 in the transverse direction. An outward chamfer 7 is provided at the position where the groove 4 penetrates the annular outer side 32 and / or the annular inner side 33 of the convex ring 3. The chamfer 7 can improve the hair inlet efficiency. The chamfer 7 can be the chamfered bevel as shown in Figure 1 , 2 , 7, 11, 13, 18, or can also be the rounded chamfer as shown in Figure 19 . The knife net blank formed by powder metallurgy is easy to simultaneously form the chamfer 7 when forming the groove 4, which simplifies the production process.

[0092] Furthermore, as shown in Figure 21In the illustrated embodiment, a comb tooth 4d is integrally injection-molded on the cutter net body 1. By powder metallurgy, it is easy to form comb teeth on the cutter net, simplifying the production process. The comb tooth 4d protrudes laterally outside the cutter net body 1 and can hook hair and guide it into the pores 4a for cutting, enabling the razor with this cutter net to shave short beards as well as long beards or long hairs. Preferably, the top surface of the comb tooth 4d is smoothly transitioned with the top surface of the net top of the cutter net body 1, providing a good skin feel.

[0093] Preferably, several of the grooves 4 communicate downward to the inner cavity 2, enabling the inner cavity 2 to perform fluid exchange with the outside through these grooves. This facilitates the entry and exit of the solution into and out of the inner cavity 2 during the subsequent process of thinning the area where the grooves 4 are located. Since water, grinding fluid, electrolyte, or other related liquids are usually used as aids in the thinning process, the internally and externally connected grooves 4 are conducive to carrying away the substances generated in the processing area during the thinning process, improving the processing efficiency.

[0094] Preferably, as Figure 3 、 8 、10a, 10b and Figure 12 In the illustrated embodiment, several concave rings 201 that are recessed upward and surround the central axis L are provided at the bottom of the net top 20. The concave rings 201 serve as processing areas for thinning to form an annular shaving track 6. A number of grooves 4 that communicate downward to the concave rings 201 are correspondingly provided on each of the concave rings 201, facilitating the outflow of the solution in each concave ring 201 to the outside during the thinning process, carrying away the substances generated in the concave ring 201 during processing, and improving the processing efficiency. The central axis L corresponds to the rotation center axis of the moving cutter.

[0095] Preferably, as Figures 6 - 10b In the illustrated embodiment, a closing portion 202 corresponding to the concave ring 201 is provided in the middle and lower part of the net top 20. The width of the closing portion 202 in the radial direction of the cutter net blank is smaller than the width of the concave ring 201. For the grooves 4 that penetrate downward to the concave ring 201, the closing portion 202 closes a part of the grooves 4 from below, making the bottom part of the grooves 4 partially closed and partially penetrating downward to the concave ring 201, which is conducive to the flow of substances during injection molding and enables better molding of the grooves and the net strips 30 between adjacent two grooves.

[0096] As Figure 8 shown, the closing portion 202 protrudes downward into the concave ring 201, which is conducive to increasing the material thickness of the closing portion 202. Of course, it can also be as Figure 10a 、 10b shown, where the bottom surface of the closing portion 202 is flush with the concave ring.

[0097] Preferably, as Figure 4 、 6In the embodiments shown in , 9, 10a, and 10b, each of the grooves 4 is downwardly connected to the concave ring 201, which is conducive to the timely outflow of the materials generated during processing in the concave ring 201, and is also conducive to reducing the physical area that needs to be cut and improving the processing efficiency.

[0098] Of course, you can also Figure 11 and Figure 12 In the illustrated embodiment, the grooves 4 are strip grooves. The grooves 4 on the concave ring 201 are distributed around the circumferential direction. Some of the grooves 4 are connected downward to the concave ring 201, and some of the grooves 4 are closed at the bottom and are not connected downward to the concave ring 201. The grooves 4 connected to the concave ring 201 and the grooves 4 not connected to the concave ring 201 are staggered, so that the bottom of one groove between two adjacent grooves 4 is closed, so that there is a wider solid material between the two grooves connected downward to the concave ring 201, which is beneficial to the flow of materials during injection molding, and is also beneficial to timely outflow and take away the materials generated by processing in the concave ring 201.

[0099] like Figure 10a As shown, there can be only one concave ring 201; of course, it can also be as Figure 3 , 8 , 10b and Figure 12 As shown, a plurality of downwardly protruding spacers 15 are provided at the bottom of the net top 20 , and the spacers 15 divide the space below the bottom of the net top into different inner and outer concave rings 201 .

[0100] like Figure 3 , 8 In the embodiment shown in FIG. 10a, the bottom of each convex ring 3 corresponds to a concave ring 201; of course, it can also be as shown in FIG. Figure 10b In the embodiment shown, the bottom of one convex ring 3 corresponds to two or more concave rings 201, and each concave ring generates a shaving track after thinning, so that one convex ring corresponds to two or more shaving tracks, and the width of the convex ring can be increased accordingly, thereby improving the integrity of the top surface of the net and improving the skin feel.

[0101] After sintering, for the knife mesh blank with a groove with a closed part at the bottom, the material thickness T1 of the closed part at the bottom of the groove 4 is ≥0.2mm, which is conducive to injection molding, and is located above the closed part at the bottom. The depth T2 of the groove 4 is ≥0.2mm, which is conducive to processing the pores 4a while ensuring the thickness H between the fixed knife surface 5 and the top surface of the mesh top.

[0102] Of course, it is not ruled out that Figure 13 In the illustrated embodiment, the bottom of the groove 4 is closed.

Claims

1. A cutter net blank of a rotary shaver, characterized in that: It includes a cutter net body (1), the cutter net body (1) has an inner cavity (2) with an opening facing downwards, a plurality of grooves (4) which are recessed downwards and used as pore inlet holes are arranged on the net top (20) of the cutter net body (1), and the grooves (4) and the cutter net body (1) are integrally formed by powder metallurgy.

2. The cutter net blank of a rotary shaver according to claim 1, characterized in that: A plurality of the grooves (4) communicate downwards into the inner cavity (2).

3. The cutter net blank of a rotary shaver according to claim 2, characterized in that: A plurality of concave rings (201) which are recessed upwards and surround the central axis L are arranged at the bottom of the net top (20), and a plurality of grooves (4) which communicate downwards into the concave rings (201) correspond to each of the concave rings (201).

4. The cutter net blank of a rotary shaver according to claim 3, characterized in that: A closing part (202) corresponding to the concave ring (201) is arranged at the middle and lower part of the net top (20), the width of the closing part (202) in the radial direction of the cutter net blank is smaller than the width of the concave ring (201), for the grooves (4) which penetrate downwards to the concave ring (201), the closing part (202) closes a part of the grooves (4) from below, so that the bottom part of the grooves (4) is partially closed and partially penetrates downwards into the concave ring (201).

5. The cutter net blank of a rotary shaver according to claim 4, characterized in that: The closing part (202) protrudes downwards in the concave ring (201).

6. The cutter net blank of a rotary shaver according to claim 3, characterized in that: Each of the grooves (4) communicates downwards into the concave ring (201).

7. The cutter net blank of a rotary shaver according to claim 3, characterized in that: The grooves (4) are strip-shaped grooves, the grooves (4) on the concave ring (201) are distributed around the circumferential direction, a plurality of the grooves (4) communicate downwards into the concave ring (201), a plurality of the grooves (4) are closed at the bottom and do not communicate downwards into the concave ring (201), and the grooves (4) which communicate into the concave ring (201) and the grooves (4) which do not communicate into the concave ring (201) are distributed alternately.

8. The cutter net blank of a rotary shaver according to claim 3, characterized in that: A plurality of spacing bars (15) which protrude downwards are arranged at the bottom of the net top (20), and the spacing bars (15) space the space below the bottom of the net top into different inner and outer concave rings (201).

9. A cutter net blank of a rotary shaver according to any one of claims 3 to 8, characterized in that: A plurality of upward convex rings (3) are arranged on the net top of the cutter net body (1), and one or more concave rings (201) correspond to the bottom of each of the convex rings (3).

10. The cutter net blank of a rotary shaver according to claim 4 or 7, characterized in that: For the sintered cutter net blank, the material thickness T1 of the closed part at the bottom of the groove (4) ≥ 0.2 mm, and above the closed part at the bottom, the depth T2 of the groove (4) ≥ 0.2 mm.

11. A cutter net blank of a rotary shaver according to any one of claims 1 to 8, characterized in that: A fillet R is formed between the groove wall (40) of the groove (4) and the top surface (31) of the net top of the cutter net body (1).

12. The cutter net blank of a rotary shaver according to claim 11, characterized in that: For the sintered cutter net blank, the radius r of the fillet R satisfies 0.05 mm ≤ r ≤ 0.10 mm.

13. The cutter net blank of a rotary shaver according to claim 11, characterized in that: The groove wall (40) of the groove (4) inclines upwards and outwards.

14. A cutter net blank of a rotary shaver according to any one of claims 1 to 8, 12, and 13, characterized in that: A plurality of upward convex rings (3) are arranged on the net top of the cutter net body (1), the grooves (4) are arranged on the convex rings (3), an inner top (8) is arranged inside the net top (20) surrounded by the innermost convex ring (3), and a central positioning post (81) is arranged along the central axis L at the bottom of the inner top (8).

15. The cutter net blank of a rotary shaver according to claim 14, characterized in that: The top end of the central positioning post (81) is closed, and a sunken gate groove (82) is arranged above the central positioning post (81) on the inner top (8).

16. The cutter net blank of a rotary shaver according to claim 15, characterized in that: The lower end of the cutter grid body (1) is provided with a flanging (11) facing outward, and a plurality of gate openings (111) are arranged on the side surface of the flanging (11) in the circumferential direction.

17. A cutter net blank of a rotary shaver according to claim 14, characterized in that: A plurality of the grooves (4) penetrate through the annular outer side (32) and / or the annular inner side (33) of the convex ring (3) in the transverse direction, and the groove bottom (401) of the groove (4) located at the annular outer side (32) and / or the annular inner side (33) of the convex ring (3) inclines downward toward the middle of the convex ring (3).

18. The cutter net blank of a rotary shaver according to claim 14, characterized in that: A plurality of the grooves (4) penetrate through the annular outer side (32) and / or the annular inner side (33) of the convex ring (3) in the transverse direction, and chamfers (7) facing outward are arranged at the positions where the grooves (4) penetrate through the annular outer side (32) and / or the annular inner side (33) of the convex ring (3).

19. A cutter net blank of a rotary shaver according to any one of claims 1 to 8, 12, and 13, characterized in that: The grid top (20) of the cutter grid body (1) is an integral plane or curved surface, a central positioning post (81) is arranged along the central axis L at the bottom of the grid top (20), and the grooves (4) are arranged around the outside of the central positioning post (81).

20. A net blank of a rotary shaver according to any one of claims 1 to 8, 12, 13, 15 to 18, characterized in that: Comb teeth (4d) are integrally injection-molded on the cutter grid body (1), and the comb teeth (4d) protrude laterally outside the cutter grid body (1).

21. A cutter net blank of a rotary shaver according to any one of claims 1 to 8, 12, 13, 15 to 18, characterized in that: The shape of the cutter grid body (1) is a circular or polygonal structure, or a petal-shaped structure.

22. A cutter net blank of a rotary shaver according to any one of claims 1 to 8, 12, 13, 15 to 18, characterized in that: In the area where the grooves (4) are distributed, the thickness d between the top surface and the bottom surface of the grid top (20) is not less than 0.3 mm.

23. The cutter net blank of a rotary shaver according to any one of claims 1 to 8, 12, 13, 15 to 18, characterized in that: The grooves (4) and the cutter grid body (1) are integrally injection-molded by powder metallurgy.

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