Fixed cutting knife of rotary shaver and cutting assembly of fixed cutting knife

Abstract

The utility model discloses a fixed cutting knife of a rotary shaver, which comprises a metal shell, a cutting part is integrally formed on the top of the shell, an annular shaving track is arranged at the bottom of the cutting part, a hair inlet hole communicated with the shaving track downwards is arranged on the cutting part, an inner cavity positioned below the shaving track is arranged on the shell, and the inner cavity is communicated with the hair inlet hole. The rotary shaver head is simple in structure, the number of parts of the rotary shaver head can be reduced, assembly procedures are reduced, and production cost is reduced. The utility model further discloses a cutting assembly of the rotary shaver, and the cutting assembly has the advantages of being simple in structure, convenient to assemble and easy to discharge hair.

Description

[Technical field]

[0001] The utility model relates to a fixed cutting blade of a rotary shaver and also relates to a cutting assembly of the rotary shaver. [Background technology]

[0002] In an existing rotary shaver, a blade net is usually installed on a plastic shell. The blade net usually has a certain height, a part of which is used to protrude above the plastic shell to ensure the cutting function, and a part of which is used to meet the assembly function with the plastic shell. The movable blade assembly that cooperates with the blade net for cutting is usually installed in the inner cavity of the blade net. The chip removal channel formed between the inner side wall of the outermost part of the blade net and the movable blade assembly is small, and the cut hair is easily blocked in the space surrounded by the movable blade assembly and the blade net and is difficult to be discharged. The cut hair scraps are easily stored in the space formed by the movable blade assembly and the blade net, and this hair storage space is small, and the hair scraps are easily filled up, which requires the user to clean it frequently. In addition, the blade net is installed on the plastic shell, and the cost includes the cost of the blade net, the plastic shell and the assembly, which is not conducive to cost reduction and efficiency improvement.

[0003] The plastic shell used to install the blade net usually includes two types. One is a hanging member, the blade net is installed on the hanging member, and a pivot structure is provided on the hanging member. The blade net is suspended and rotatably connected to the blade head bracket through the pivot structure, and is installed on the razor body through the blade head bracket to allow the blade net and the corresponding movable blade to swing with the curvature of the skin during shaving, as shown in the patent announcement number CN102348544B. In addition, for this kind of hanging design, in actual applications, the plastic shell often needs to be additionally installed and fixed inside the plastic shell due to the insufficient structural strength of the plastic material; the other is a blade head cover, the blade net is installed on the blade head cover, and a main body connecting structure is provided on the blade head cover, and the main body connecting structure is used to be installed and connected to the razor body.

[0004] The utility model is made based on this situation. [Utility Model Content]

[0005] The technical problem to be solved by the utility model is to provide a fixed cutter of a rotary shaver, which has the characteristics of simple structure, capable of reducing the number of parts of the rotary shaver head, reducing assembly procedures and reducing production costs.

[0006] The utility model is realized by the following technical solutions:

[0007] A fixed cutting blade of a rotary shaver comprises a metal shell, a cutting portion is integrally formed on the top of the shell, a circular shaving track is arranged at the bottom of the cutting portion, a hair inlet hole downwardly connected to the shaving track is arranged on the cutting portion, and an inner cavity is arranged below the shaving track on the shell.

[0008] In the fixed cutter of a rotary shaver as described above, the shell is provided with a hanging structure for hanging the shell and allowing the shell to rotate.

[0009] In the fixed cutter of a rotary shaver as described above, a skin contact area located outside the cutting portion is provided on the top of the shell, a suspension ring is integrally formed below the skin contact area, and the suspension ring is provided with the suspension structure.

[0010] In the fixed cutter of a rotary shaver as described above, the suspension ring is located on the inner side of the outer edge of the top of the housing.

[0011] In the fixed cutter of a rotary shaver as described above, the skin contact area is provided with a non-planar structure which is not on the same plane as the surface of the skin contact area.

[0012] In the fixed cutter of a rotary shaver as described above, the hanging structure is a hanging hole or a hanging column.

[0013] In the fixed cutter of a rotary shaver as described above, the shell is provided with a main body connection structure for connecting with the shaver main body.

[0014] As described above, the fixed cutting blade of a rotary shaver, the main body connection structure includes an insertion fitting portion arranged at the lower part of the inner cavity, and a buckle arranged on the side wall of the insertion fitting portion or a magnetic attraction component installation groove or internal thread for installing the magnetic attraction component.

[0015] In the fixed cutter of a rotary shaver as described above, the cutting portion protrudes upward on the top of the housing.

[0016] As for the fixed cutting blade of a rotary shaver as described above, the housing is integrally formed with one, two or more cutting parts.

[0017] In the fixed cutter of a rotary shaver as described above, the side wall of the inner cavity is located outside the range corresponding to the cutting portion downward.

[0018] In the fixed cutting blade of a rotary shaver as described above, an anti-slip groove for installing an anti-slip ring is provided in the inner cavity.

[0019] In the fixed cutter of a rotary shaver as described above, the top of the hair inlet hole has a rounded corner R, and the side wall of the hair inlet hole has a sharp-angled blade.

[0020] In the fixed cutting blade of a rotary shaver as described above, the shell and the cutting part are integrally formed by powder metallurgy.

[0021] The technical problem to be solved by the utility model is to provide a cutting assembly of a rotary shaver, which has the characteristics of simple structure, convenient assembly and easy hair removal.

[0022] The utility model is realized by the following technical solutions:

[0023] A cutting assembly with a fixed cutter of the rotary shaver as described above, wherein a moving cutter assembly is arranged in the inner cavity, the moving cutter assembly comprises a cutter disc and moving cutting teeth, the moving cutting teeth are located in the shaving track, and the cutter disc is located below the inner side wall of the outermost part of the cutting part.

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

[0025] 1. The utility model adopts a metal shell to replace the plastic shell, and a cutting part to replace the blade net. The shell and the cutting part are integrally formed, and the structure is simple, which reduces the number of parts of the rotary shaver head and the assembly process, and is conducive to reducing the large-scale production cost.

[0026] 2. The fixed cutting blade of the rotary shaver has a suspension structure rotatably connected to the blade head bracket, allowing the cutting part to swing with the curvature of the skin during shaving. The suspension ring and the suspension structure are integrally formed with the shell, and are all metal structures with good structural strength and simple structure.

[0027] 3. The side wall of the inner cavity is located outside the range corresponding to the cutting part downward. Since the outer shell and the cutting part are integrally formed, the height of the inner side wall of the outermost part of the cutting part can be reduced, which is convenient for the middle and lower part of the movable knife assembly located in the inner cavity, especially the knife disc of the movable knife assembly is located below the inner side wall of the outermost part of the cutting part, which widens the chip removal channel, so that the cut hair can easily fall to the bottom of the knife disc for discharge, while increasing the hair storage space.

[0028] 4. The shell and the cutting part are integrally formed by powder metallurgy, that is, the shell and the cutting part are integrally formed by injection molding, which has a simple structure, is conducive to manufacturing, is convenient for mass production and improves production efficiency.

Brief Description of the Drawings

[0029] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 It is a three-dimensional diagram of an embodiment of a fixed cutting blade of a rotary shaver of the utility model;

[0031] Figure 2 yes Figure 1 A bottom view of an embodiment;

[0032] Figure 3 yes Figure 1 A top view of an embodiment;

[0033] Figure 4 is along Figure 3Sectional view in the AA direction;

[0034] Figure 5 This is a schematic diagram of the cooperation between a fixed cutting knife and a moving knife assembly of a rotary shaver of the utility model;

[0035] Figure 6 It is a schematic diagram of the result of a fixed cutting knife with a striped skew structure;

[0036] Figure 7 It is a result schematic diagram of a fixed cutting knife with a point-shaped eccentric structure;

[0037] Figure 8 It is a result schematic diagram of a fixed cutting knife with a stripe-shaped eccentric structure and a dot-shaped eccentric structure;

[0038] Fig. 9 It is a schematic diagram of the top structure of an embodiment of a cutter head of a fixed cutter of a rotary shaver of the utility model;

[0039] Fig.10 It is a schematic diagram of the bottom structure of an embodiment of a cutter head of a fixed cutter of a rotary shaver of the utility model;

[0040] Fig.11 This is a structural schematic diagram of an embodiment of the utility model in which the outer shell of a fixed cutting blade of a rotary shaver is used as a blade head cover;

[0041] Fig.12 yes Fig.11 A cross-sectional view of an embodiment of the present invention;

[0042] Fig.13 It is a structural schematic diagram of an embodiment of the utility model in which a fixed cutting blade of a rotary shaver has a magnetic attraction component mounting groove;

[0043] Fig.14 It is a structural schematic diagram of an embodiment of the utility model in which a fixed cutting blade of a rotary shaver has two cutting parts on its housing;

[0044] Fig.15 The utility model is a structural schematic diagram of an embodiment in which the cutting portion of the fixed cutting blade of a rotary shaver is flush with the top of the shell.

[0045] Figure 16a-16e is a schematic diagram of the cross section of the pore;

[0046] Fig.17 It is a structural schematic diagram of the movable knife assembly installed in the knife net in the prior art;

[0047] Fig.18 yes Fig.17 Cross-sectional view of . [Specific implementation method]

[0048] The utility model is further described below in conjunction with the accompanying drawings:

[0049] like Figures 1 to 15 The fixed cutting blade of a rotary shaver shown in the figure comprises a metal shell 1, a suspension structure 8 or a main body connection structure is provided on the shell 1, a cutting portion 2 is integrally formed on the top of the shell 1, a circular shaving track 3 is provided at the bottom of the cutting portion 2, a hair inlet hole 4 downwardly connected to the shaving track 3 is provided on the cutting portion 2, and an inner cavity 5 located below the shaving track 3 is provided on the shell 1. The utility model adopts a metal shell 1 to replace a plastic shell, and a cutting portion 2 to replace a blade net. The shell 1 and the cutting portion 2 are integrally formed, and the structure is simple, which reduces the number of parts of the rotary shaver head, reduces the assembly process, and is conducive to reducing the large-scale production cost.

[0050] like Figures 1 to 5 In the embodiment shown, the housing 1 is provided with a suspension structure 8 for suspending the housing 1 and allowing the housing 1 to rotate. Fig. 9 and Fig.10 As shown, the fixed cutter of the rotary shaver is rotatably connected to the cutter head bracket 16 via the suspension structure 8, and is mounted on the shaver body via the cutter head bracket 16.

[0051] The hanging structure 8 is a hanging hole or a hanging column, and the cutter head bracket 16 is correspondingly provided with a rotating column or a rotating hole that rotates in coordination with the hanging hole or the hanging column.

[0052] A skin contact area 6 located outside the cutting portion 2 is provided on the top of the shell 1, a suspension ring 7 is integrally formed below the skin contact area 6, and the suspension structure 8 is provided on the suspension ring 7. The suspension ring 7 and the suspension structure 8 are integrally formed with the shell 1, and are both metal structures with good structural strength and simple structure.

[0053] like Figure 2 and Figure 4 As shown, the suspension ring 7 is located on the inner side of the outer edge of the top of the housing 1, which facilitates the insertion of the suspension ring 7 into the mounting hole of the cutter head bracket 16 to hide the suspension structure 8 inside, and limits the swing angle of the fixed cutting knife of the rotary shaver relative to the cutter head bracket 16.

[0054] Furthermore, if Figure 6 to Figure 7 As shown, the skin contact area 6 is provided with an eccentric structure 9 which is not on the same plane as the surface of the skin contact area 6. The eccentric structure 9 is a convex structure or a concave structure, which improves the skin feel of the skin contact area 6 when it moves on the skin.

[0055] like Figures 11 to 13In the embodiment shown, the housing 1 is provided with a main body connection structure for connecting with the shaver body. The main body connection structure includes an insertion matching portion 10 provided at the lower part of the inner cavity 5, and a buckle 11 provided on the side wall of the insertion matching portion 10 or a magnetic attraction component installation groove 13 or an internal thread for installing a magnetic attraction component 12. The buckle 11 is used to be clamped on the shaver body; the magnetic attraction component installation groove 13 is used to install the magnetic attraction component 12, such as a magnet, and fix it on the shaver body by magnetic attraction; and the internal thread is used to be threadedly connected to the shaver body.

[0056] like Figure 2 , 4 As shown in FIGS. 5, 12 and 13, the side wall of the inner cavity 5 is located outside the range corresponding to the downward direction of the cutting part 2. Since the outer shell 1 and the cutting part 2 are integrally formed, the height of the inner side wall 21 at the outermost part of the cutting part 2 can be reduced, which is convenient for the middle and lower part of the moving knife assembly 17 located in the inner cavity 5, especially the knife disc 171 of the moving knife assembly is located below the inner side wall 21 at the outermost part of the cutting part 2, widening the channel for chip removal, so that the cut hair can easily fall to the bottom of the knife disc 171 for discharge, while increasing the hair storage space.

[0057] The inner cavity 5 is provided with an anti-slip groove 15 , which is used to install an anti-slip ring 14 , and the anti-slip ring 14 is used to confine the movable knife assembly in the inner cavity 5 .

[0058] The cutting portion 2 protrudes upward on the top of the housing 1, and when the hair inlet hole is a groove-shaped structure, it is convenient for hair to enter. Of course, the cutting portion 2 can also be flush with the top of the housing 1, such as Fig.15 shown.

[0059] like Fig.14 In the illustrated embodiment, more than two cutting portions 2 are integrally formed on the housing 1 .

[0060] like Figures 16a to 16e As shown, the top of the hair inlet hole 4 has a rounded corner R, and the side wall of the hair inlet hole 4 has an acute-angled blade 4b.

[0061] The blade 4b corresponds to the side wall on one side, such as Fig.16a In the embodiment shown, it is an inclined straight line segment 301; or Fig.16c The embodiment shown is a concave arc segment 303; or Fig.16d The embodiment shown includes a first inclined section 304 and a second inclined section 305. With respect to the up-down direction, the slope of the first inclined section 304 is greater than that of the second inclined section 305. Fig.16c and Fig.16d The illustrated embodiment is advantageous in that the blade 4b has a smaller angle and at the same time the mesh strip 30 between two adjacent feed holes 4 has a smaller width and better strength.

[0062] like Fig.16b In the illustrated embodiment, relative to the up-down direction, the slope of the blade 4b of the hair inlet hole 4 is greater on one side than on the other side.

[0063] The shell 1 and the cutting part 2 are integrally formed by powder metallurgy, that is, the shell 1 and the cutting part 2 are integrally formed by injection molding, which has a simple structure and is conducive to mass production and improved production efficiency.

[0064] The following is an embodiment of a powder metallurgy forming process, comprising the following steps:

[0065] A. A raw material having stainless steel powder is injection molded by an injection molding machine to obtain a blank, wherein the blank comprises a shell 1, a cutting portion 2 is integrally formed on the top of the shell 1, a pore inlet groove is provided on the cutting portion 2, and the shell 1 has an inner cavity 5 with an opening facing downward;

[0066] B. Put the embryo into the degreasing furnace for degreasing;

[0067] C. Put the degreased blank into a sintering furnace for sintering;

[0068] D. heat-treating and hardening the sintered blank;

[0069] E. Part of the material is cut off from the bottom of the cutting part 2 of the blank to form a fixed blade surface, and at the same time, a shaving hole 4 communicating with each other from top to bottom is formed at the shaving hole groove, and a shaving track 3 for the rotating motion of the movable blade teeth is formed below the fixed blade surface.

[0070] 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 of POM powder accounts for 5% to 15%; the stainless steel powder can be selected from 440C stainless steel powder, 316 stainless steel powder or 420 stainless steel powder.

[0071] In step B, the degreasing temperature is 100° C. to 150° C. Oxalic acid is introduced into the degreasing furnace to vaporize the POM material in the embryo at high temperature and remove it. The degreasing time is 6 h to 10 h.

[0072] In step A, the suspension ring 7 , the suspension structure 8 or the main body connection structure are integrally injection-molded with the housing 1 .

[0073] like Figure 5 , 12, 13 shows a cutting assembly of a fixed cutting knife of the above-mentioned rotary shaver, wherein a movable knife assembly 17 is provided in the inner cavity 5, and the movable knife assembly 17 includes a knife disc 171 and movable cutting teeth 172, wherein the movable cutting teeth 172 are located in the shaving track 3, and the knife disc 171 is located below the outermost inner side wall 21 of the cutting part 2, and has the characteristics of simple structure, convenient assembly, and easy hair removal.

Claims

1. A fixed cutting blade of a rotary shaver, characterized in that: The invention comprises a metal shell (1), a cutting portion (2) is integrally formed on the top of the shell (1), a ring-shaped shaving track (3) is arranged at the bottom of the cutting portion (2), a hair inlet hole (4) connected downwardly to the shaving track (3) is arranged on the cutting portion (2), and an inner cavity (5) located below the shaving track (3) is arranged on the shell (1).

2. The fixed cutting blade of a rotary shaver according to claim 1, characterized in that: The outer shell (1) is provided with a suspension structure (8) for suspending the outer shell (1) and allowing the outer shell (1) to rotate.

3. The fixed cutting blade of a rotary shaver according to claim 2, characterized in that: A skin contact area (6) located outside the cutting portion (2) is provided on the top of the shell (1), a suspension ring (7) is integrally formed below the skin contact area (6), and the suspension structure (8) is provided on the suspension ring (7).

4. The fixed cutting blade of a rotary shaver according to claim 3, characterized in that: The suspension ring (7) is located on the inner side of the outer edge of the top of the housing (1).

5. The fixed cutting blade of a rotary shaver according to claim 3, characterized in that: The skin contact area (6) is provided with a non-planar structure (9) which is not on the same plane as the surface of the skin contact area (6).

6. The fixed cutting blade of a rotary shaver according to claim 2, characterized in that: The hanging structure (8) is a hanging hole or a hanging column.

7. The fixed cutting blade of a rotary shaver according to claim 1, characterized in that: The housing (1) is provided with a main body connection structure for connecting to a shaver main body.

8. The fixed cutting blade of a rotary shaver according to claim 7, characterized in that: The main body connection structure comprises an insertion matching portion (10) arranged at the lower part of the inner cavity (5), and a buckle (11) arranged on the side wall of the insertion matching portion (10) or a magnetic attraction component installation groove (13) or an internal thread for installing a magnetic attraction component (12).

9. A fixed cutter for a rotary shaver according to any one of claims 1 to 8, characterized in that: The cutting portion (2) protrudes upward on the top of the housing (1).

10. A fixed cutter for a rotary shaver according to any one of claims 1 to 8, characterized in that: The housing (1) is integrally formed with one, two or more cutting portions (2).

11. A fixed cutter for a rotary shaver according to any one of claims 1 to 8, characterized in that: The side wall of the inner cavity (5) is located outside the range to which the cutting portion (2) corresponds downward.

12. The fixed cutting blade of a rotary shaver according to claim 11, characterized in that: The inner cavity (5) is provided with an anti-slip groove (15) for installing an anti-slip ring (14).

13. A fixed cutter for a rotary shaver according to any one of claims 1 to 8, characterized in that: The top of the hair inlet hole (4) has a rounded corner R, and the side wall of the hair inlet hole (4) has an acute-angled blade (4b).

14. A fixed cutter for a rotary shaver according to any one of claims 1 to 8, characterized in that: The shell (1) and the cutting part (2) are integrally formed by powder metallurgy.

15. A cutting assembly with a fixed cutting blade of a rotary shaver according to claim 11 or 12, characterized in that: A movable knife assembly (17) is provided in the inner cavity (5), and the movable knife assembly (17) comprises a knife disc (171) and movable cutting teeth (172), wherein the movable cutting teeth (172) are located in the shaving track (3), and the knife disc (171) is located below the outermost inner side wall (21) of the cutting portion (2).

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