Knife net of rotary shaver

Abstract

The utility model discloses a rotary shaver net which comprises a shaver net body, the shaver net body is formed by powder metallurgy, the shaver net body is provided with an inner cavity with a downward opening, a hair inlet hole is integrally formed in the net top of the shaver net body, a fixed shaver face is arranged at the bottom of the net top of the shaver net body, and a shaving track in which movable shaver teeth rotate is formed below the fixed shaver face. The rotary shaver net is simple in structure and easy to produce and manufacture, the hair feeding and cutting efficiency can be improved, and flexible design of the rotary shaver net is facilitated. The utility model further discloses a knife net of the rotary shaver, the net strips are arranged between every two adjacent hair inlet holes at intervals, the acute-angle cutting edges are formed on one side or two sides of each net strip, and the knife net of the rotary shaver is simple in structure and capable of improving hair inlet efficiency and cutting sharpness.

Description

[Technical field]

[0001] The utility model relates to a rotary shaver blade net. [Background technology]

[0002] The blade nets of rotary shavers on the market are usually circular blade nets, and their structure is usually that there are several convex rings surrounding the center on the top of the circular blade net, and the bottom of the convex ring forms a shaving track, and a plurality of hair-feeding cutting grooves are opened on the convex ring in a circumferential direction for allowing hair to enter the shaving track for cutting. The current manufacturing process is to use stainless steel sheets to be stamped into the required shape, and then form holes or grooves for hair to enter on the convex ring by punching or grinding wheel cutting.

[0003] Among them, the commonly used cutting process is to use the grinding wheel on the grooving equipment to cut the material on the convex ring to cut out the required hair feed cutting grooves one by one. Its production efficiency is low, and usually a certain number of grooving equipment are required to meet the production needs. The investment cost of the grooving equipment is high. The hair feed cutting groove generally runs through the top surface and side surface of the convex ring to facilitate the hair to enter the shaving track from the top surface and side surface of the convex ring. While cutting the hair feed cutting groove, the side wall of the hair feed cutting groove located on the top surface of the convex ring forms a cutting edge. The cutting edge cooperates with the rotating moving tooth to cut the hair located in the hair feed cutting groove. The hair feed cutting groove 102 cut by the grinding wheel is a straight straight groove, such as Fig.38 and Fig.39 As shown, the straight groove refers to the slot hole that cuts through the top surface of the convex ring 101 and the inner and outer sides of the ring in the horizontal direction. The side wall of the feed cutting groove located on the top surface of the convex ring is a straight wall, and the cutting edge 103 formed is a right-angle structure, such as Fig.40 As shown, its sharpness is poor, and it can only cut hair by cooperating with a high-speed rotating moving knife to improve its sharpness. Due to safety considerations and to prevent the skin from being cut by squeezing into the knife net through the hair feed cutting groove, the hair feed cutting groove is generally processed by a very thin grinding wheel, and the slot width of the hair feed cutting groove is usually designed to be very small, generally around 0.26mm. However, the hair feed cutting groove is small in width, and the mesh strips between the two hair feed cutting grooves have a certain width, which is generally greater than the width of the hair feed cutting groove to ensure the strength of the processing and use. In this way, the actual effective hair feed area in a region will be very small, which makes it difficult for the hair to enter the interior of the knife net when the top surface of the knife net moves against the skin. It needs to be moved repeatedly to allow the hair to enter the shaving track to be cut, resulting in low hair feed and shaving efficiency;

[0004] When there are two, especially three or more convex rings, in order to fully arrange the feed cutting grooves, the number and distribution of the feed cutting grooves between the inner and outer convex rings are usually different. Since the space between two adjacent convex rings is very small, such as Fig.41 and Fig.42As shown, when the grinding wheel 104 is processing the hair feed cutting groove, it can only be processed from the upper side with a larger space, and there will be a great difference in the cutting depth of the hair feed cutting groove on the side wall of the convex ring between the side wall close to the grinding wheel and the side wall away from the grinding wheel. The cutting depth here refers to the depth from top to bottom. Often, when the cutting depth of the side wall close to the grinding wheel is appropriate, the cutting depth of the other side wall is not enough or even not processed. It is necessary to continuously deepen the cutting depth of the side wall close to the grinding wheel to ensure that the other side wall has a certain cutting depth. In addition, in order to avoid the grinding wheel cutting another convex ring, the cutting depth of the side wall away from the grinding wheel is still very limited, and the cutting depth can only be processed very shallowly. When there are three or more convex rings, the middle convex ring located between the inner and outer convex rings can only be processed very shallowly on the two side walls due to space limitations, which is not conducive to the hair entering the knife net.

[0005] The other punching and punching processes can usually only punch out the required hair entry holes on the top surface of the shaving track. The side of the shaving track is closed and cannot be used to introduce hair, resulting in poor hair entry efficiency. In addition, due to the small size of the blade net, for example, the outer diameter of the blade net with double-ring shaving tracks commonly used in shavers is usually about 20mm to 21mm. When punching the holes on it, it is necessary to rotate the blade net around the circumference for multiple times for punching. In addition, in order to ensure the safety of cutting, the hair entry holes are very small, the stamping mold needs to be very precise, the punching needle of the mold is very thin and easy to damage, and the mold life is short. This process is rarely used in general industry.

[0006] The utility model is made based on the above situation. [Contents of the utility model]

[0007] The technical problem to be solved by the utility model is to provide a rotary shaver blade net, which has a simple structure, is easy to produce and manufacture, can improve the hair feeding and cutting efficiency, and is conducive to the flexible design of the rotary shaver blade net.

[0008] In order to solve the above technical problems, the utility model discloses a rotary shaver blade net, comprising a blade net body, which is formed by powder metallurgy, and has an inner cavity with an opening facing downward, and a hair inlet hole is integrally injection-molded on the top of the blade net body, and the blade net body is provided with a fixed blade surface at the bottom of the top of the blade net body, and a shaving track is formed below the fixed blade surface for the movable blade teeth to rotate inside, and the hair inlet hole is connected to the shaving track up and down.

[0009] In the rotary shaver blade net as described above, a rounded corner R is formed between the side wall of the hair inlet hole and the top surface of the net top of the blade net body, and the side wall of the hair inlet hole has an acute-angled blade.

[0010] A rotary shaver blade net as described above, a mesh strip is spaced between two adjacent hair-feeding holes, the side surface of the mesh strip has an inclined straight line segment, and the angle between the straight line segment and the fixed blade surface forms a blade; or the side surface of the mesh strip has an outwardly convex arc segment, and the angle between the convex arc segment and the fixed blade surface forms a blade; or the side surface of the mesh strip has an inwardly concave arc segment, and the angle between the concave arc segment and the fixed blade surface forms a blade; or the side surface of the mesh strip includes a first inclined segment and a second inclined segment, and relative to the up and down direction, the inclination of the first inclined segment is greater than that of the second inclined segment, and the angle between the first inclined segment and the fixed blade surface forms a blade; or a mesh strip is spaced between two adjacent hair-feeding holes, and relative to the up and down direction, the inclination of one side of the mesh strip is greater than that of the other side, and the mesh strip is only provided with an acute-angled blade on the side with the larger inclination.

[0011] In the rotary razor blade mesh as described above, the radius r of the rounded corner R satisfies 0.05mm≤r≤0.10mm, and the angle a of the blade is ≤87°.

[0012] In the rotary shaver blade net as described above, a center positioning column is provided at the bottom of the net top of the blade net body along the center axis L, and the top end of the center positioning column is closed.

[0013] In the rotary shaver blade net as described above, a plurality of upward convex rings are arranged on the top of the blade net body, the hair inlet holes are arranged on the convex rings, and the fixed blade surface is arranged at the bottom of the convex rings.

[0014] In the rotary shaver blade net as described above, a plurality of the hair inlet holes penetrate the annular outer side and / or the annular inner side of the convex ring in the transverse direction, and the hair inlet holes have narrowed narrow openings near the annular outer side and / or the annular inner side of the convex ring in the transverse direction.

[0015] In the rotary shaver blade net as described above, a plurality of the hair inlet holes penetrate the annular outer side and / or the annular inner side of the convex ring in the transverse direction, and the hair inlet holes are provided with outward chamfers at the positions where they penetrate the annular outer side and / or the annular inner side of the convex ring.

[0016] In a rotary shaver blade net as described above, comb teeth are integrally injection-molded on the blade net body, and the comb teeth protrude laterally on the outside of the blade net body; further, the top surface of the comb teeth smoothly transitions with the top of the blade net body, the length m of the comb teeth protruding laterally from the outer edge of the blade net body satisfies 0.3mm≤m≤1.0mm, and the height n of the comb tooth head satisfies 0.3mm≤n≤0.5mm at a distance k=0.1mm from the outer end of the comb tooth head to the inside. When a plurality of upward convex rings are provided on the mesh top of the knife net body, and the inlet holes are arranged on the convex rings, the inlet holes on the outermost convex ring include a first inlet hole having one end penetrating the annular outer side of the convex ring in the horizontal direction, the first inlet holes are in plurality and arranged around the circumferential direction, and comb teeth protruding toward the outer side of the convex ring are provided between two adjacent first inlet holes, and the comb teeth are integrally injection molded with the knife net body; further, the other end of the first inlet hole penetrates the annular inner side of the convex ring or does not penetrate the annular inner side of the convex ring to form a terminal end, a mesh top sheet is provided between two adjacent first inlet holes, and the mesh top sheet is provided with a second inlet hole closed on all sides or a third inlet hole having one end penetrating the annular inner side of the convex ring in the horizontal direction and the other end being a terminal end.

[0017] A rotary shaver blade net as described above, on the same convex ring, the hair inlet holes thereon include a first hair inlet hole having one end penetrating the annular outer side of the convex ring in the transverse direction, and the inner end of the first hair inlet hole penetrating the annular inner side of the convex ring, and a second hair inlet hole closed on all sides, the first hair inlet holes are multiple and arranged in a circumferential direction, and a second hair inlet hole is arranged between two adjacent first hair inlet holes;

[0018] Alternatively, on the same convex ring, the inlet holes thereon include a first inlet hole having one end penetrating the annular outer side of the convex ring in the transverse direction, and the other end of the first inlet hole does not penetrate the annular inner side of the convex ring and forms a terminal end, and a third inlet hole having one end penetrating the annular inner side of the convex ring in the transverse direction and the other end being a terminal end, and the first inlet hole and the third inlet hole are respectively arranged around the circumferential direction and the two are staggered;

[0019] Alternatively, on the same convex ring, the inlet holes thereon include a first inlet hole having one end penetrating through the annular outer side of the convex ring in the transverse direction, and the other end of the first inlet hole terminates in the middle of the convex ring, a second inlet hole closed on all sides, and a third inlet hole having one end penetrating through the annular inner side of the convex ring in the transverse direction and the other end terminates in the middle of the convex ring, the first inlet holes are distributed in the outer half circle of the convex ring, the third inlet holes are distributed in the inner half circle of the convex ring, the first inlet holes are arranged in the circumferential direction and a plurality of second inlet holes are spaced between two adjacent first inlet holes, and the third inlet holes are arranged in the circumferential direction and a plurality of second inlet holes are spaced between two adjacent third inlet holes.

[0020] In the rotary shaver blade net as described above, the blade net body is in the shape of a circular or polygonal structure, or a petal-shaped structure.

[0021] The technical problem to be solved by the utility model is to provide a rotary shaver blade net, which has a simple structure and can improve the hair feeding efficiency and the cutting sharpness.

[0022] In order to solve the above technical problems, the utility model discloses a rotary shaver blade net, comprising a blade net body, the blade net body having an inner cavity with an opening facing downward, a hair feeding hole being arranged on the net top of the blade net body, a fixed blade surface being arranged at the bottom of the net top of the blade net body, a shaving track being formed below the fixed blade surface for the movable blade teeth to rotate internally, the hair feeding holes being connected to the shaving track up and down, a mesh strip being arranged between two adjacent hair feeding holes, and an acute-angled blade being formed on one side or both sides of the mesh strip.

[0023] As described above, the side surface of the rotary razor blade net of the mesh strip has an inclined straight line segment, and the angle between the straight line segment and the fixed blade surface forms a blade edge; or, the side surface of the mesh strip has an outwardly convex arc segment, and the angle between the convex arc segment and the fixed blade surface forms a blade edge; or, the side surface of the mesh strip has an inwardly concave arc segment, and the angle between the concave arc segment and the fixed blade surface forms a blade edge; or, the side surface of the mesh strip includes a first inclined segment and a second inclined segment, and relative to the up and down direction, the inclination of the first inclined segment is greater than that of the second inclined segment, and the angle between the first inclined segment and the fixed blade surface forms a blade edge; or, relative to the up and down direction, the inclination of one side of the mesh strip is greater than that of the other side, and the mesh strip is only provided with an acute-angle blade on the side with the larger inclination.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1. The rotary shaver blade net of the utility model has a blade net body and a hair inlet hole formed in one piece by powder metallurgy. It is only necessary to cut off part of the material at the bottom of the blade net body top after the blade net is sintered to form a fixed blade surface and a shaving track for the movable blade teeth to rotate inside. The production process is simple, the production efficiency is high, and it is easy to mass produce, which is conducive to reducing the cost of development and production, and is conducive to the flexible design of the rotary shaver blade net, avoiding the limitation of the existing grinding wheel grooving and stamping punching process on the hair inlet hole. The hair inlet hole can be designed into different shapes, and the limitation of the existing circular blade net is broken. The shape of the blade net body can be flexibly designed into different shapes to meet the different appearance requirements of the shaver product, so that the shape of the shaver product is not limited to the shape of the circular blade net, and can provide diversified choices for different users.

[0026] 2. The utility model has a rounded corner R to increase the entrance of the top of the burr hole in powder metallurgy forming. Compared with the traditional knife net, the effective burr feeding area is greatly improved in the knife net area of ​​the same area, which can improve the efficiency of burr feeding and shaving. At the same time, in powder metallurgy forming, the side wall of the burr hole can be tilted to form an acute-angled blade on the side wall of the burr hole, thereby improving the sharpness of cutting.

[0027] 3. The rotary shaver blade net of the utility model can be integrally formed with inlet holes during powder metallurgy molding. The shape of the inlet holes can be a regular circle, a regular straight line, or other irregular shapes, which is conducive to meeting different functional requirements, and the blade net body and all the inlet holes thereon can be formed at one time. Therefore, the limitations of the existing traditional manufacturing processes of grinding wheel grooving and punching and punching on the blade net repeatedly processed and unable to flexibly cut out inlet holes of different shapes are avoided, and the shape of the inlet holes can be flexibly designed; and the limitation of the existing grinding wheel grooving process on the blade net body being circular is avoided. Since the utility model does not need to rotate at each angle for grooving, the blade net body can be flexibly designed into different shapes, which can meet different design and functional requirements.

[0028] 4. The rotary shaver blade net of the utility model can integrally form comb teeth during powder metallurgy molding, which has a simple process and is easy to produce and mold. The comb teeth protrude laterally from the outside of the blade net body and can hook up hair and guide it into the first hair inlet hole for cutting, so that the shaver equipped with the blade net can shave long beards or long hair while shaving short beards.

[0029] 5. The rotary shaver blade net of the utility model has sharp-angled blades formed on one or both sides of the net strip, which can improve the sharpness of cutting. The sharp-angled blades are conducive to enlarging the entrance at the top of the hair entry hole, thereby improving the hair entry efficiency and cutting efficiency.

Brief Description of the Drawings

[0030] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 It is a structural schematic diagram of an embodiment of a rotary shaver blade net of the utility model;

[0032] Figure 2 It is a top view of an embodiment of a rotary shaver blade mesh of the utility model;

[0033] Figure 3 The utility model is a rotary shaver blade mesh of an embodiment of the blade mesh blank along the Figure 2 Sectional view in the AA direction;

[0034] Figure 4The utility model is a rotary razor blade mesh of an embodiment of the utility model. After cutting off part of the material to form the fixed blade surface, the rear edge Figure 2 Sectional view in the AA direction;

[0035] Figure 5 The utility model is a rotary razor blade mesh of an embodiment of the utility model. After cutting off part of the material to form the fixed blade surface, the rear edge Figure 2 Cross-sectional view in the BB direction;

[0036] Figure 6a It is a cross-sectional view of the pore formed by cutting away part of the material at the bottom of the groove;

[0037] Figure 6b is a cross-sectional view of an embodiment in which the side surface of the mesh strip has an outwardly convex arc segment;

[0038] Figure 6c is a cross-sectional view of an embodiment in which the side surface of the mesh strip has an inwardly concave arc segment;

[0039] Figure 6d is a cross-sectional view of an embodiment in which the side surface of the mesh strip has a first inclined section and a second inclined section with different slopes;

[0040] Figure 6e is a cross-sectional view of an embodiment in which the slope of one side of the mesh strip is greater than that of the other side;

[0041] Figure 7 The embodiment of the groove in the knife mesh blank passing through the convex ring up and down is along Figure 2 Cross-sectional view in the BB direction;

[0042] Figure 8 It is a cross-sectional view of an embodiment of a groove in which a groove in a knife mesh blank passes through a convex ring up and down;

[0043] Fig. 9 The embodiment of the groove bottom closure in the knife mesh blank is along Figure 2 Cross-sectional view in the BB direction;

[0044] Fig.10 is a cross-sectional view of an embodiment of a groove in which the bottom of the groove in the knife mesh blank is closed;

[0045] Fig.11 is a schematic diagram of an embodiment in which the pores or grooves are in the shape of a water drop;

[0046] Fig.12 It is a top view of an embodiment of a rotary shaver blade having bracket-shaped hair inlet holes or grooves according to the utility model;

[0047] Fig.13 yes Fig.12 A partial enlarged view of point C in the middle;

[0048] Fig.14 It is a schematic diagram of an embodiment in which the inlet hole or groove is a straight line groove;

[0049] Fig.15 is a schematic diagram of an embodiment in which the inlet hole or groove is C-shaped;

[0050] Fig.16 is a schematic diagram of an embodiment in which the pores or grooves are wavy;

[0051] Fig.17 It is a schematic diagram of an embodiment in which the groove is composed of a straight groove and a second groove closed on all sides;

[0052] Fig.18 is a schematic diagram of another embodiment in which the groove is composed of a straight groove and a second groove closed on all sides;

[0053] Fig.19 is a schematic diagram of an embodiment in which the groove is composed of a C-shaped first groove and a second groove closed on all sides and arranged in a clockwise combination;

[0054] Fig. 20 is a schematic diagram of an embodiment in which the groove is composed of a C-shaped first groove with a terminal end and a third groove arranged in a counterclockwise combination;

[0055] Fig.21 is a schematic diagram of an embodiment in which a groove is composed of a first groove having a terminal end and a third groove;

[0056] Fig. 22 is a schematic diagram of an embodiment in which a groove on a convex ring is composed of a first groove, a second groove and a third groove;

[0057] Fig.23 Schematic diagram of an embodiment in which the grooves on the inner and outer convex rings have different shapes;

[0058] Fig.24 It is a schematic diagram of an embodiment in which the inner and outer half circles of the same convex ring each have a row of grooves;

[0059] Fig.25 is a schematic diagram of another embodiment in which the inner and outer half circles of the same convex ring each have a row of grooves;

[0060] Fig.26 is a schematic diagram of an embodiment in which a plurality of grooves are provided on the same convex ring;

[0061] Fig. 27 is a schematic diagram of an embodiment of the same convex ring having a circular groove;

[0062] Fig.27a is a schematic diagram of an embodiment of a rotary shaver blade without a convex ring structure;

[0063] Fig.28 is a schematic diagram of an embodiment in which the outer convex ring has comb teeth;

[0064] Fig.29 is a schematic diagram of another embodiment in which the outer convex ring has comb teeth;

[0065] Fig.30 is a perspective view of another embodiment in which the outer convex ring has comb teeth;

[0066] Fig.30a is a cross-sectional view of a rotary shaver foil having comb teeth;

[0067] Fig.31 It is a schematic diagram of an embodiment of a rotary shaver blade having three convex rings according to the utility model;

[0068] Fig.32 It is a schematic diagram of an embodiment of a rotary shaver blade having a convex ring according to the utility model;

[0069] Fig.33 It is a schematic diagram of an embodiment in which no convex ring is provided on the top of the knife net body;

[0070] Fig.34 is a schematic diagram of an embodiment in which the shape of the knife net body is a polygonal structure;

[0071] Fig.34a is a schematic diagram of an embodiment in which the blade net body is in a polygonal structure and has comb teeth;

[0072] Fig.35 is a schematic diagram of an embodiment in which the shape of the blade net body is a multi-segment arc structure;

[0073] Fig.35a is a schematic diagram of an embodiment in which the shape of the blade net body is a multi-segment arc structure and has comb teeth;

[0074] Fig.36 is a schematic diagram of the master mold;

[0075] Fig.37 It is a schematic diagram of the public mold;

[0076] Fig.38 It is a structural reference diagram of the circular knife screen in the prior art;

[0077] Fig.39 It is a cross-sectional reference diagram of a circular knife screen in the prior art;

[0078] Fig.40 It is a cross-sectional reference diagram of the hair feeding cutting groove of the circular knife net in the prior art;

[0079] Fig.41 It is a reference diagram of the pores of the circular knife mesh in the prior art through the grinding wheel cutting the outer convex ring;

[0080] Fig.42 It is a reference diagram of the pores of the circular knife mesh in the prior art through the grinding wheel cutting the inner convex ring. [Specific implementation method]

[0081] The utility model is further described below in conjunction with the accompanying drawings:

[0082] A powder metallurgy manufacturing process for a rotary razor blade mesh comprises the following steps:

[0083] A. The raw material with stainless steel powder is injected into the mold by an injection molding machine to obtain a knife mesh blank, such as Figures 1 to 3 As shown, the knife net blank comprises a knife net body 1, the knife net body 1 has an inner cavity 2 with an opening facing downward, and a plurality of downwardly concave grooves 4 are integrally formed on the top of the knife net body 1. Preferably, as shown in FIG. Figure 8 and Fig.10 As shown, the groove 4 has a groove wall 40 inclined upward and outward, and a rounded corner R is formed between the groove wall 40 and the top surface 31 of the mesh top of the knife net body 1;

[0084] B. Put the knife mesh blank into the degreasing furnace for degreasing;

[0085] C. Put the degreased knife mesh blank into the sintering furnace for sintering;

[0086] 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;

[0087] E. A portion of the material is cut off from the bottom of the top of the knife net body 1 to form a fixed knife surface 5, and at the same time, a hair inlet hole 4a communicating with each other is formed at the groove 4, and a blade 4b with an acute angle is formed on the side wall of the hair inlet hole 4a, and a shaving track 6 for rotating the movable knife teeth is formed below the fixed knife surface 5, as shown in FIG. Figures 4 to 6e shown.

[0088] 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 granular raw material through a granulator, wherein the mass proportion of POM powder is 5% to 15%; preferably, the stainless steel powder is 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] The powder metallurgy process for manufacturing the rotary razor blade mesh can mass-produce blade mesh blanks through injection molding. The blade mesh blanks are integrally molded with grooves and can be put into a degreasing furnace and a sintering furnace for processing and batch heat treatment. Part of the material is removed from the bottom of the mesh top of the blade mesh body 1. The material can be quickly removed by turning, milling or grinding. The process is simple, the production efficiency is high, and it is easy to mass produce, which is conducive to reducing the cost of development and production.

[0094] The obtained rotary shaver blade net has a side wall of the hair inlet hole 4a that is inclined outward, and a chamfered corner R is provided between the side wall of the hair inlet hole and the top surface 31, so that the entrance of the hair inlet hole 4a at the top is significantly enlarged, which is easy to introduce hair and improves the hair feeding and cutting efficiency; at the same time, the side wall of the hair inlet hole 4a forms a blade 4b with an acute angle, which improves the cutting sharpness, helps the moving knife to reduce its rotation speed, and reduces the noise during shaving.

[0095] The shape of the groove 4 of the knife net blank obtained by injection molding from the top downward can be flexibly changed according to needs, and can be a regular circle, such as Fig. 27 In the embodiment of the present invention, the circular groove is located in the middle; it can also be a regular straight line groove, such as Fig.14 As shown; it can also be other irregular shaped grooves, such as Figure 1 , 2 , 11, 13 and Figures 15 to 30 The shape of the embodiment shown can meet different functional requirements and avoid the limitations of the existing grinding wheel grooving and punching processes on the knife net structure.

[0096] like Figure 1 , 2 , 12, 17 to Fig.30 As shown, the shape of the knife net body 1 can be either circular or Fig.34 The polygonal structure shown, or a structure composed of multiple arcs, such as Fig.35 The petal-shaped structure shown. And other required shapes. The knife net blank of the utility model breaks through the limitation of the existing circular knife net, and the shape of the knife net body 1 can be flexibly designed into different shapes.

[0097] The rounded corner R is formed by a mold, and after sintering in step C, the radius r of the rounded corner R satisfies 0.05mm≤r≤0.10mm. In step E, after part of the material is cut off from the bottom of the mesh top of the knife net body 1, the thickness H between the fixed knife surface 5 and the top surface of the mesh top is ≥0.10mm, preferably between 0.12mm and 0.15mm. The thickness between the fixed knife surface 5 and the top surface of the mesh top can be equal or unequal. For the unequal thickness, the thickness of the thinnest part between the fixed knife surface 5 and the top surface of the mesh top is greater than or equal to 0.10mm. The size of the rounded corner R and the thickness H are matched, while ensuring the shaving cleanliness, the efficiency of hair feeding is effectively improved, and at the same time, it is avoided that the rounded corner R is cut when part of the material is cut off from the bottom of the mesh top, so as to control and ensure the shape of the hair feeding hole 4a.

[0098] The angle a of the blade 4b is ≤87°, preferably 50°≤a≤80°, which has high feeding efficiency, good sharpness, and is easy to demould, thus avoiding the weak strength of the mesh strip 30 between the two feeding holes 4a.

[0099] Preferably, in the above step A, Fig. 9 and Fig.10 In the embodiment 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 inlet pores 4a while ensuring the thickness H between the fixed knife surface 5 and the top surface of the mesh top. Fig.10As 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.

[0100] Of course, you can also Figure 7 and Figure 8 In the embodiment shown, the groove 4 may also pass through the top of the net from top to bottom, and the bottom is not closed.

[0101] Preferably, if Figures 1 to 4 As shown in , 12, 17 to 32, the top of the knife net body 1 is provided with a plurality of upward convex rings 3, the grooves 4 are provided on the convex rings 3, and the fixed knife surface 5 is provided at the bottom of the convex rings 3. Fig.33 As shown, the mesh top of the knife net body 1 may not be provided with the convex ring 3.

[0102] A center positioning column 81 is provided at the bottom of the net top of the knife net body 1 along the center axis L. The center positioning column 81 is used for center positioning of the movable knife that rotates relative to it to improve the stability of the rotation of the movable knife.

[0103] The powder metallurgy process can be used to manufacture a double-ring knife net with two convex rings, such as Figure 1 , it is also possible to manufacture a single-ring knife net with only one convex ring, such as Fig.32 As shown, it is also possible to manufacture three or more multi-ring knife nets, such as Fig.31 As shown. The top surface of the knife net can be distributed along a plane, or along an arc surface or a spherical surface. When there are more than two convex rings, through the above-mentioned powder metallurgy process, the groove 4 on each convex ring can effectively avoid being affected by other convex rings during production.

[0104] For the structure with a convex ring, an inner top 8 is provided on the inner side of the top of the knife mesh blank surrounded by the innermost convex ring 3, and a central positioning column 81 is provided at the bottom of the inner top 8 along the central axis L. The top of the central positioning column 81 is closed, and a sunken gate groove 82 is provided on the top of the inner top 8 above the central positioning column 81. The concave inner top 8 is used to install a decorative sheet and cover the gate groove 82. A mold is provided in the injection molding machine, such as Fig.36 and Fig.37 As shown, the mold includes a male mold 91 and a female mold 92, the female mold 92 is provided with a cavity 921, the middle of the cavity 921 is provided with a raised glue inlet 922, the glue inlet 922 corresponds to the molding gate groove 82, the male mold 91 is provided with a core 911 for molding an inner cavity 2, the middle of the core 911 is provided with a concave positioning column groove 912, the positioning column groove 912 corresponds to the molding center positioning column 81, and a ejector pin 913 is provided on the core 911 at a position corresponding to the inner ejector 8.

[0105] The above structure is conducive to injection molding the convex ring and the grooves thereon, and is conducive to reducing the width of the mesh strip 30 spaced between two adjacent grooves, increasing the area ratio of the grooves on the convex ring, and improving the hair feeding efficiency.

[0106] like Fig.11 In the embodiment shown, several grooves 4 extend horizontally through the annular outer side 32 of the convex ring 3, and the grooves 4 have narrowed narrow openings 4c at positions near the annular outer side 32 of the convex ring 3 in the horizontal direction. Several grooves 4 extend horizontally through the annular inner side 33 of the convex ring 3, and the grooves 4 have narrowed narrow openings 4c at positions near the annular inner side 33 of the convex ring 3 in the horizontal direction. Fig.13 In the embodiment shown, the plurality of grooves 4 penetrate the annular outer side 32 and the annular inner side 33 of the convex ring 3 in the transverse direction. In the transverse direction, the grooves 4 have narrowed narrow openings 4c at positions near the annular outer side 32 and the annular inner side 33 of the convex ring 3. The correspondingly processed hair inlet holes 4a have narrow openings 4c. When the top of the blade net is pressed against the skin for shaving, the narrow openings 4c can prevent the skin from squeezing into the hair inlet holes 4a, thereby facilitating the increase of the width of the hair inlet holes 4a at the inner side of the openings 4c, increasing the effective hair inlet area, and improving the hair inlet efficiency and the hair cutting efficiency. The transverse direction referred to here is the direction perpendicular to the central axis L of the blade net.

[0107] In order to further improve the efficiency of feeding the hair, the plurality of grooves 4 penetrate the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 in the transverse direction, and the groove 4 is provided with an outward chamfer 7 at the position where it penetrates the annular outer side 32 and / or the annular inner side 33 of the convex ring 3. The chamfer 7 can be Figure 1 , 2 , 11, 17, 19, 20, 23, 24 shown in the chamfer angle, can also be Fig.18 , 21 and the rounded corners shown in 22.

[0108] As for the grooves 4 on the same knife net or the same convex ring 3, they can be grooves 4 of the same shape, such as Fig.12 As shown, it can also be a combination of grooves 4 of different shapes, such as Figure 1 , 2 and Figures 17 to 30 shown.

[0109] like Figures 17 to 19 In the embodiment shown, on the same convex ring 3, the groove 4 thereon includes a first groove 41 having one end penetrating the annular outer side 32 of the convex ring 3 in the transverse direction, and the inner end of the first groove 41 penetrates the annular inner side 33 of the convex ring 3, and a second groove 42 closed all around, the first grooves 41 are arranged in a circumferential direction and a second groove 42 is provided between two adjacent first grooves 41, as shown in FIG. Fig.17and Fig.19 As shown, the number of the second groove 42 between two adjacent first grooves 41 can be one, or two or more. Fig.18 As shown; after part of the material is cut off from the bottom of the convex ring 3 to form the fixed blade surface 5, the corresponding first hair entry hole 4a1 and the second hair entry hole 4a2 are formed at the positions of the first groove 41 and the second groove 42. Since the first groove 41 is an annular outer side 32 and an annular inner side 33 that penetrate the convex ring 3 at both ends, the skin can easily squeeze into the first groove 41, and the second groove 42 is closed all around, which is not conducive to the skin squeezing in. Therefore, the width of the second groove 42 can be made wider than the first groove 41 to increase the probability of short beards falling into the second hair entry hole 4a2. While ensuring safety, the first groove 41 and the second groove 42 are arranged alternately, which is conducive to improving the efficiency of hair entry and shaving.

[0110] like Figure 1 , 2 , 20 and Fig.21 In the illustrated embodiment, on the same convex ring 3, the groove 4 thereon includes a first groove 41 having one end penetrating the annular outer side 32 of the convex ring 3 in the lateral direction, and the other end of the first groove 41 does not penetrate the annular inner side 33 of the convex ring 3 to form a terminal end, and a third groove 43 having one end penetrating the annular inner side 33 of the convex ring 3 in the lateral direction and the other end being a terminal end. The first groove 41 and the third groove 43 are respectively arranged around the circumferential direction and the two are staggered. After part of the material is cut away from the bottom of the convex ring 3 to form the fixed knife surface 5, corresponding first inlet holes 4a1 and third inlet holes 4a3 are formed at the positions of the first groove 41 and the third groove 43.

[0111] like Fig.24 In the illustrated embodiment, on the same convex ring 3, the groove 4 thereon includes a first groove 41 having one end penetrating the annular outer side 32 of the convex ring 3 in the lateral direction, and the other end of the first groove 41 terminates at the middle of the convex ring 3, a second groove 42 closed on all sides, and a third groove 43 having one end penetrating the annular inner side 33 of the convex ring 3 in the lateral direction and the other end terminates at the middle of the convex ring 3, the first grooves 41 are distributed in the outer half circle of the convex ring 3, the third grooves 43 are distributed in the inner half circle of the convex ring 3, the first grooves 41 are arranged in the circumferential direction and the second grooves 42 are spaced between two adjacent first grooves 41, the third grooves 43 are arranged in the circumferential direction and the second grooves 42 are spaced between two adjacent third grooves 43, after part of the material is cut away from the bottom of the convex ring 3 to form the fixed knife surface 5, corresponding first inlet holes 4a1, second inlet holes 4a2 and third inlet holes 4a3 are formed at the positions of the first grooves 41, the second grooves 42 and the third grooves 43.

[0112] The first groove 41 and the third groove 43 may be wave-shaped, C-shaped, bracket-shaped or teardrop-shaped grooves, and the second groove 42 may be an elliptical, wave-shaped, C-shaped, olive-shaped or polygonal groove.

[0113] like Figures 27a to 30a , Fig.34a , Fig.35a In the embodiment shown, the blade net body 1 is integrally injection-molded with comb teeth 4d, which protrude laterally from the outside of the blade net body 1 and can hook up hair and guide it into the pores 4a for cutting, so that a shaver equipped with the blade net can shave long beards or long hair while shaving short beards.

[0114] Preferably, if Fig.30a As shown, the top surface of the comb tooth 4d transitions smoothly with the top surface of the net top of the knife net body 1, and has a good skin feel. The length m of the comb tooth 4d protruding laterally from the outer edge of the knife net body 1 satisfies 0.3mm≤m≤1.0mm, preferably between 0.5mm≤m≤0.8mm. The height n of the head of the comb tooth 4d, measured at a distance k=0.1mm from the outer end of the head of the comb tooth 4d, satisfies 0.3mm≤n≤0.5mm, which avoids the comb teeth being too sharp to scratch the skin and has a good combing effect.

[0115] like Figures 28 to 30 In the embodiment shown, when a plurality of upwardly directed protruding rings 3 are provided on the top of the mesh of the blade net body 1, the groove 4 on the outermost protruding ring 3 includes a first groove 41 having one end penetrating the annular outer side 32 of the protruding ring 3 in the transverse direction, the first groove 41 has a plurality of first grooves 41 arranged in a circumferential direction, and a comb tooth 4d protruding toward the outer side of the protruding ring 3 is provided between two adjacent first grooves 41, the comb tooth 4d is integrally formed with the blade net body, the width of the comb tooth 4d is small at the head and large at the root, after part of the material is cut off from the bottom of the protruding ring 3 to form the fixed blade surface 5, a corresponding first hair inlet hole 4a1 is formed at the position of the first groove 41, and the comb tooth 4d is located between two adjacent first hair inlet holes 4a1. The comb tooth 4d protrudes laterally from the outer side of the blade net body 1, and can hook up the hair and introduce it into the first hair inlet hole 4a1 for cutting, so that the shaver equipped with the blade net can shave long beards or long hair while shaving short beards.

[0116] The preferred combination of grooves 4 is as follows Fig.28 In the embodiment shown, the other end of the first groove 41 passes through the annular inner side 33 of the convex ring 3, a mesh top sheet 311 is provided between two adjacent first grooves 41, and a second groove 42 closed on all sides is provided on the mesh top sheet 311, and after part of the material is cut off from the bottom of the convex ring 3 to form the fixed blade surface 5, corresponding first inlet holes 4a1 and second inlet holes 4a2 are formed at the positions of the first grooves 41 and the second grooves 42;

[0117] Or, if Fig.29 and Fig.30 In the embodiment shown, the other end of the first groove 41 does not penetrate the annular inner side 33 of the convex ring 3 to form a terminal end, and a mesh top sheet 311 is provided between two adjacent first grooves 41. The mesh top sheet 311 is provided with a third groove 43 having one end penetrating the annular inner side 33 of the convex ring 3 in the transverse direction and the other end being a terminal end. After part of the material is cut away from the bottom of the convex ring 3 to form the fixed knife surface 5, corresponding first inlet holes 4a1 and third inlet holes 4a3 are formed at the positions of the first grooves 41 and the third grooves 43.

[0118] like Fig.27a , 34a In the illustrated embodiment, when the convex ring 3 is not provided on the top of the knife net body 1, comb teeth 4d are provided on the outer side of the knife net body 1, and a hair inlet hole 4a is provided between two adjacent comb teeth 4d.

[0119] like Figure 2 , 4 -6e, 11 to 35, the rotary shaver blade net shown comprises a blade net body 1, the blade net body 1 has an inner cavity 2 opening facing downward, a plurality of downwardly concave grooves 4 are integrally formed on the mesh top of the blade net body 1, the grooves 4 have groove walls 40 inclined upward and outward, a chamfer R is formed between the groove walls 40 and the top surface 31 of the mesh top of the blade net body 1, the blade net body 1 is integrally formed by the above-mentioned powder metallurgy process, a part of the material is cut off from the bottom of the mesh top of the blade net body 1 to form a fixed blade surface 5, and at the same time, a hair inlet pore 4a communicating with each other from top to bottom is formed in the groove 4, and a blade edge 4b ​​with an acute angle is formed on the side wall of the hair inlet pore 4a, and a shaving track 6 for the movable blade teeth to rotate internally is formed below the fixed blade surface 5.

[0120] A mesh strip 30 is provided between two adjacent hair inlet holes 4a, and a sharp-angled blade 4b is formed on one side or both sides of the mesh strip 30.

[0121] like Figure 6a and Figure 6e In the embodiment shown, the side of the mesh strip 30 has an inclined straight line segment 301, a rounded corner R is connected between the straight line segment 301 and the top surface 31 of the mesh top, and the angle between the straight line segment 301 and the fixed blade surface 5 forms a blade 4b, which has a simple structure and a corresponding mold structure.

[0122] like Figure 6b In the illustrated embodiment, the side surface of the mesh strip 30 has an outwardly convex arc segment 302, and the angle between the convex arc segment 302 and the fixed blade surface 5 forms a blade 4b, which is beneficial to increase the width of the top entrance into the pores.

[0123] like Figure 6cIn the embodiment shown, the side surface of the mesh strip 30 has a concave arc segment 303, and the angle between the concave arc segment 303 and the fixed blade surface 5 forms a blade 4b. Figure 6d In the illustrated embodiment, the side surface of the mesh strip 30 includes a first inclined section 304 and a second inclined section 305. Relative to the up and down direction, the slope of the first inclined section 304 is greater than that of the second inclined section 305. The angle between the first inclined section 304 and the fixed blade surface 5 forms a blade 4b. Figure 6c and Figure 6d The illustrated embodiment is advantageous in that the blade 4b has a smaller angle a and the mesh strip 30 has a smaller width and better strength.

[0124] like Figure 6e In the embodiment shown, the slope of one side of the mesh strip 30 is greater than the other side relative to the up-down direction, and the mesh strip 30 is provided with an acute-angled blade 4b only on the side with a larger slope, so that the mesh strip has a better structural strength and is conducive to narrowing the width of the mesh strip. Figures 6a to 6c As shown, the left and right sides of the mesh strip 30 are symmetrical or nearly symmetrical, and blades 4b are provided on both the left and right sides of the mesh strip 30, so that cutting can be performed in cooperation with the moving knife that rotates clockwise and counterclockwise.

[0125] A center positioning column 81 is provided at the bottom of the mesh top of the knife mesh body 1 along the center axis L. The top of the center positioning column 81 is closed, which is conducive to setting a gate groove 82 above the center positioning column 81 along the center axis L to improve the stability of the knife mesh injection molding.

[0126] like Figure 2 , 4 As shown in FIGS. 11 to 32 , a plurality of upward convex rings 3 are provided on the top of the knife net body 1 , the inlet holes 4 a are provided on the convex rings 3 , and the fixed knife surface 5 is provided at the bottom of the convex rings 3 .

[0127] like Fig.11 In the embodiment of the inlet holes 4a shown in the figure, a plurality of the inlet holes 4a penetrate the annular outer side 32 of the convex ring 3 in the transverse direction, and a narrowed gorge 4c is provided at a position of the inlet holes 4a close to the annular outer side 32 of the convex ring 3 in the transverse direction; a plurality of the inlet holes 4a penetrate the annular inner side 33 of the convex ring 3 in the transverse direction, and a narrowed gorge 4c is provided at a position of the inlet holes 4a close to the annular inner side 33 of the convex ring 3 in the transverse direction; Fig.13 Another embodiment of the inlet holes 4a is shown, in which several of the inlet holes 4a penetrate the annular outer side 32 and the annular inner side 33 of the convex ring 3 in the horizontal direction at the same time, and in the horizontal direction, the inlet holes 4a have a narrowed width at the positions close to the annular outer side 32 and the annular inner side 33 of the convex ring 3.

[0128] like Figure 1 ,2 , 17 to 26, 28 to 30, a plurality of the inlet holes 4a penetrate the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 in the horizontal direction, and the inlet holes 4a are located at the annular outer side 32 and / or the annular inner side 33 of the convex ring 3 and are provided with outward chamfers 7.

[0129] like Figures 27a to 30a , Fig.34a , Fig.35a In the illustrated embodiment, comb teeth 4d are integrally formed on the blade net body 1 , and the comb teeth 4d protrude laterally from the outside of the blade net body 1 .

[0130] Preferably, if Fig.30a As shown, the top surface of the comb tooth 4d transitions smoothly with the top surface of the mesh top of the knife net body 1, the length m of the comb tooth 4d protruding laterally from the outer edge of the knife net body 1 satisfies 0.3mm≤m≤1.0mm, and the height n of the head of the comb tooth 4d, measured at a distance k=0.1mm from the outer end of the head of the comb tooth 4d, satisfies 0.3mm≤n≤0.5mm.

[0131] like Figures 28 to 30 In the knife net shown in the figure, when a plurality of upwardly directed protruding rings 3 are provided on the top of the knife net body 1, the inlet holes 4a on the outermost protruding ring 3 include a first inlet hole 4a1 having one end penetrating the annular outer side 32 of the protruding ring 3 in the horizontal direction, the first inlet holes 4a1 are multiple and arranged around the circumferential direction, and a comb tooth 4d protruding toward the outer side of the protruding ring 3 is provided between two adjacent first inlet holes 4a1, the comb tooth 4d is integrally formed with the knife net body 1, and the width of the comb tooth 4d is small at the head and large at the root. The other end of the first inlet hole 4a1 penetrates the annular inner side 33 of the protruding ring 3 or does not penetrate the annular inner side 33 of the protruding ring 3 to form a terminal end, and a net top sheet 311 is provided between two adjacent first inlet holes 4a1, and the net top sheet 311 is provided with a second inlet hole 4a2 closed all around or a third inlet hole 4a3 having one end penetrating the annular inner side 33 of the protruding ring 3 in the horizontal direction and the other end being a terminal end.

[0132] like Fig.27a , 34a In the illustrated embodiment, when the convex ring 3 is not provided on the top of the knife net body 1, comb teeth 4d are provided on the outer side of the knife net body 1, and a hair inlet hole 4a is provided between two adjacent comb teeth 4d.

[0133] As various embodiments of the pore 4a of the present invention:

[0134] like Figures 17 to 19The knife net shown in the figure, on the same convex ring 3, the inlet holes 4a thereon include a first inlet hole 4a1 having one end penetrating the annular outer side 32 of the convex ring 3 in the transverse direction, and the inner end of the first inlet hole 4a1 penetrating the annular inner side 33 of the convex ring 3, and a second inlet hole 4a2 closed on all sides, the first inlet holes 4a1 are multiple and arranged in the circumferential direction, and a second inlet hole 4a2 is arranged between two adjacent first inlet holes 4a1. Fig.17 and Fig.19 In the embodiment shown, a second inlet hole 4a2 is disposed between two adjacent first inlet holes 4a1, and the first inlet holes 4a1 and the second inlet holes 4a2 are alternately disposed around the circumferential direction. Of course, two or more second inlet holes 4a2 may also be disposed between two adjacent first inlet holes 4a1, such as Fig.18 shown.

[0135] like Figure 2 , 20 The knife net shown in FIG. 21, on the same convex ring 3, the inlet holes 4a thereon include a first inlet hole 4a1 having one end penetrating the annular outer side 32 of the convex ring 3 in the lateral direction, and the other end of the first inlet hole 4a1 does not penetrate the annular inner side 33 of the convex ring 3 to form a terminal end, and a third inlet hole 4a3 having one end penetrating the annular inner side 33 of the convex ring 3 in the lateral direction and the other end being a terminal end, the first inlet hole 4a1 and the third inlet hole 4a3 are respectively arranged around the circumferential direction and the two are staggered.

[0136] like Fig.24 The knife net shown in the figure, on the same convex ring 3, the inlet holes 4a thereon include a first inlet hole 4a1 having one end penetrating the annular outer side 32 of the convex ring 3 in the transverse direction, and the other end of the first inlet hole 4a1 terminates in the middle of the convex ring 3, a second inlet hole 4a2 closed on all sides, and a third inlet hole 4a3 having one end penetrating the annular inner side 33 of the convex ring 3 in the transverse direction and the other end terminates in the middle of the convex ring 3, the first inlet holes 4a1 are distributed in the outer half circle of the convex ring 3, the third inlet holes 4a3 are distributed in the inner half circle of the convex ring 3, the first inlet holes 4a1 are arranged in the circumferential direction and there is one or more second inlet holes 4a2 between two adjacent first inlet holes 4a1, the third inlet holes 4a3 are arranged in the circumferential direction and there is one or more second inlet holes 4a2 between two adjacent third inlet holes 4a3.

[0137] like Fig.25The knife net shown in the figure is on the same convex ring 3, and the inlet holes 4a thereon include a first inlet hole 4a1 having one end penetrating the annular outer side 32 of the convex ring 3 in the transverse direction, and the other end of the first inlet hole 4a1 terminates at the middle of the convex ring 3, and a third inlet hole 4a3 having one end penetrating the annular inner side 33 of the convex ring 3 in the transverse direction and the other end terminates at the middle of the convex ring 3, the first inlet holes 4a1 are distributed in the outer half circle of the convex ring 3, and the third inlet holes 4a3 are distributed in the inner half circle of the convex ring 3, and the first inlet holes 4a1 and the third inlet holes 4a3 are respectively arranged around the circumferential direction and are staggered.

Claims

1. A rotary shaver blade, characterized in that: The invention comprises a blade net body (1), wherein the blade net body (1) is formed by powder metallurgy, the blade net body (1) has an inner cavity (2) with an opening facing downward, a hair inlet hole (4a) is integrally formed on the top of the blade net body (1), the blade net body (1) is provided with a fixed blade surface (5) at the bottom of the top of the blade net body (1), a shaving track (6) is formed below the fixed blade surface (5) for the movable blade teeth to rotate inside, and the hair inlet hole (4a) is connected to the shaving track (6) in upper and lower directions.

2. The rotary shaver blade according to claim 1, characterized in that: A rounded corner R is formed between the side wall of the feed hole (4a) and the top surface (31) of the mesh top of the knife net body (1), and the side wall of the feed hole (4a) has a sharp-angled blade (4b).

3. The rotary shaver blade according to claim 2, characterized in that: A mesh strip (30) is provided between two adjacent inlet holes (4a); the side surface of the mesh strip (30) has an inclined straight line segment (301); the angle between the straight line segment (301) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) has an outwardly convex arc segment (302); the angle between the convex arc segment (302) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) has an outwardly convex arc segment (302); the angle between the convex arc segment (302) and the fixed blade surface (5) forms a blade (4b); The surface has an inwardly concave arc section (303), and the angle between the concave arc section (303) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) includes a first inclined section (304) and a second inclined section (305), and relative to the up and down directions, the inclination of the first inclined section (304) is greater than that of the second inclined section (305), and the angle between the first inclined section (304) and the fixed blade surface (5) forms a blade (4b).

4. The rotary shaver blade according to claim 2, characterized in that: A mesh strip (30) is provided between two adjacent hair inlet holes (4a); relative to the up-down direction, the slope of one side of the mesh strip (30) is greater than the other side; and the mesh strip (30) is provided with an acute-angled blade (4b) only on the side with the greater slope.

5. The rotary shaver blade according to claim 2, characterized in that: The radius r of the rounded corner R satisfies 0.05 mm ≤ r ≤ 0.10 mm, and the angle a of the blade (4 b) ≤ 87°.

6. The rotary shaver blade according to claim 1, characterized in that: A central positioning column (81) is provided at the bottom of the net top of the knife net body (1) along the central axis L, and the top end of the central positioning column (81) is closed.

7. A rotary shaver blade according to any one of claims 1 to 6, characterized in that: A plurality of upwardly facing convex rings (3) are arranged on the top of the knife net body (1); the hair inlet holes (4a) are arranged on the convex rings (3); and the fixed knife surface (5) is arranged at the bottom of the convex rings (3).

8. The rotary shaver blade according to claim 7, characterized in that: The plurality of inlet holes (4a) penetrate the annular outer side (32) and / or the annular inner side (33) of the convex ring (3) in the transverse direction. In the transverse direction, the inlet holes (4a) have narrowed narrow openings (4c) at positions close to the annular outer side (32) and / or the annular inner side (33) of the convex ring (3).

9. The rotary shaver blade according to claim 7, characterized in that: The plurality of inlet holes (4a) penetrate the annular outer side (32) and / or the annular inner side (33) of the convex ring (3) in the transverse direction, and the inlet holes (4a) are provided with outward chamfers (7) at the positions where they penetrate the annular outer side (32) and / or the annular inner side (33) of the convex ring (3).

10. A rotary shaver blade according to any one of claims 1 to 6, characterized in that: The blade net body (1) is integrally injection-molded with comb teeth (4d), and the comb teeth (4d) protrude laterally from the outside of the blade net body (1).

11. The rotary shaver blade according to claim 10, characterized in that: The top surface of the comb teeth (4d) smoothly transitions to the top surface of the mesh top of the knife net body (1); the length m of the comb teeth (4d) protruding laterally from the outer edge of the knife net body (1) satisfies 0.3mm≤m≤1.0mm; the height n of the head of the comb teeth (4d), measured at a distance k=0.1mm inward from the outer end of the head of the comb teeth (4d), satisfies 0.3mm≤n≤0.5mm.

12. The rotary shaver blade according to claim 10, characterized in that: The net top of the knife net body (1) is provided with a plurality of upwardly facing convex rings (3), and the inlet holes (4a) are arranged on the convex rings (3). The inlet holes (4a) on the outermost convex ring (3) include a first inlet hole (4a1) having one end penetrating the annular outer side (32) of the convex ring (3) in the transverse direction, and the first inlet holes (4a1) are in plurality and arranged in a circumferential direction, and comb teeth (4d) protruding toward the outer side of the convex ring (3) are provided between two adjacent first inlet holes (4a1).

13. The rotary shaver blade according to claim 12, characterized in that: The other end of the first hair inlet hole (4a1) passes through the annular inner side (33) of the convex ring (3) or does not pass through the annular inner side (33) of the convex ring (3) to form a terminal end, and a mesh top sheet (311) is provided between two adjacent first hair inlet holes (4a1), and the mesh top sheet (311) is provided with a second hair inlet hole (4a2) which is closed on all sides or a third hair inlet hole (4a3) which has one end in the transverse direction passing through the annular inner side (33) of the convex ring (3) and the other end being a terminal end.

14. The rotary shaver blade according to claim 7, characterized in that: On the same convex ring (3), the inlet holes (4a) thereon include a first inlet hole (4a1) having one end penetrating the annular outer side (32) of the convex ring (3) in the transverse direction, and the inner end of the first inlet hole (4a1) penetrating the annular inner side (33) of the convex ring (3), and a second inlet hole (4a2) closed on all sides, wherein there are a plurality of the first inlet holes (4a1) arranged in a circumferential direction, and a second inlet hole (4a2) is arranged between two adjacent first inlet holes (4a1).

15. The rotary shaver blade according to claim 7, characterized in that: On the same convex ring (3), the inlet holes (4a) thereon include a first inlet hole (4a1) having one end penetrating the annular outer side (32) of the convex ring (3) in the transverse direction, and the other end of the first inlet hole (4a1) does not penetrate the annular inner side (33) of the convex ring (3) to form a terminal end, and a third inlet hole (4a3) having one end penetrating the annular inner side (33) of the convex ring (3) in the transverse direction and the other end being a terminal end, wherein the first inlet hole (4a1) and the third inlet hole (4a3) are respectively arranged around the circumferential direction and the two are arranged alternately.

16. The rotary shaver blade according to claim 7, characterized in that: On the same convex ring (3), the inlet holes (4a) thereon include a first inlet hole (4a1) having one end penetrating the annular outer side (32) of the convex ring (3) in the transverse direction, and the other end of the first inlet hole (4a1) terminates at the middle of the convex ring (3), a second inlet hole (4a2) closed on all sides, and a third inlet hole (4a2) having one end penetrating the annular inner side (33) of the convex ring (3) in the transverse direction and the other end terminates at the middle of the convex ring (3). 3), the first inlet pores (4a1) are distributed in the outer half circle of the convex ring (3), the third inlet pores (4a3) are distributed in the inner half circle of the convex ring (3), the first inlet pores (4a1) are arranged in a circumferential direction and a plurality of second inlet pores (4a2) are spaced between two adjacent first inlet pores (4a1), and the third inlet pores (4a3) are arranged in a circumferential direction and a plurality of second inlet pores (4a2) are spaced between two adjacent third inlet pores (4a3).

17. A rotary shaver blade according to any one of claims 1 to 6, characterized in that: The shape of the knife net body (1) is a circular or polygonal structure, or a petal-shaped structure.

18. A rotary shaver blade, characterized in that: The invention comprises a blade net body (1), wherein the blade net body (1) has an inner cavity (2) with an opening facing downwards, a hair feeding hole (4a) is arranged on the top of the blade net body (1), a fixed blade surface (5) is arranged at the bottom of the top of the blade net body (1), a shaving track (6) is formed below the fixed blade surface (5) for the movable blade teeth to rotate inside, the hair feeding hole (4a) is connected with the shaving track (6) up and down, a mesh strip (30) is arranged between two adjacent hair feeding holes (4a), and a sharp-angled blade (4b) is formed on one side or both sides of the mesh strip (30).

19. The rotary shaver blade according to claim 18, characterized in that: The side surface of the mesh strip (30) has an inclined straight line segment (301), and the angle between the straight line segment (301) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) has an outwardly convex arc segment (302), and the angle between the convex arc segment (302) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) has an inwardly concave arc segment (303), and the angle between the concave arc segment (303) and the fixed blade surface (5) forms a blade (4b); or the side surface of the mesh strip (30) includes a first inclined segment (304) and a second inclined segment (305), and relative to the up and down direction, the inclination of the first inclined segment (304) is greater than that of the second inclined segment (305), and the angle between the first inclined segment (304) and the fixed blade surface (5) forms a blade (4b).

20. The rotary shaver blade according to claim 18, characterized in that: With respect to the up-down direction, the slope of one side of the mesh bar (30) is greater than that of the other side, and the mesh bar (30) is provided with a sharp-angled blade (4b) only on the side with the greater slope.

Images