Fixed blade, electric shaver head using the fixed blade and manufacturing method thereof

Abstract

The present invention discloses a reciprocating linear cutting electric shaver head, comprising a fixed knife support and a fixed knife, the fixed knife support is provided with left and right support parts to support the fixed knife from both sides, an internal cavity is formed between the fixed knife and the fixed knife support, a hair feeding groove is provided between the fixed knife and the fixed knife support, a moving knife matched with the fixed knife is provided in the internal cavity, a middle mounting hole is provided in the middle of the top wall of the fixed knife, an intermediate knife net passing through the middle mounting hole and protruding above the top surface of the fixed knife is provided in the internal cavity, an intermediate knife matching with the intermediate knife net and capable of reciprocating back and forth for cutting is provided below the intermediate knife net, and a transmission component connecting the moving knife and the intermediate knife to the power device of the electric shaver is also provided; the present invention also discloses a fixed knife for the above electric shaver head; the present invention also discloses a method for manufacturing the above electric shaver head. The electric shaver head of the present invention has a simple structure, a small volume, a cutting function protruding from the middle above the fixed knife, and good cutting performance.

Description

[Technical field]

[0001] The invention relates to a fixed blade of an electric shaver head with reciprocating linear cutting, the invention also relates to an electric shaver head with reciprocating linear cutting, and the invention also relates to a method for manufacturing an electric shaver head with reciprocating linear cutting. [Background technology]

[0002] Existing reciprocating linear motion razor heads are usually small in size, flexible in use, and sharp in cutting. Generally, the fixed blade is fixed by a fixed blade bracket to form an inner cavity for the movable blade to move linearly inside, and then a cutting surface is formed on the top surface of the fixed blade, and cutting is performed from both sides. This type of reciprocating razor head, because the fixed blade is fixed to the fixed blade bracket from both sides using a metal sheet, the fixed blade is an integral structure, and the fixed blade is made of a very thin metal sheet, and usually its thickness is consistent, that is, there is only one thickness cut when cutting. Although it meets the cutting requirements well, its function is relatively single, and the user experience needs to be further improved. However, due to its small size, in the reciprocating razor industry, it is generally believed that the design space for this type of product is already very small. Therefore, the current research is basically only based on the existing structure, how to optimize the connection structure between the fixed blade and the fixed blade bracket, and the coordination between the movable blade and the fixed blade and the fixed blade bracket to make some specific optimization designs. For example, the patent for the blade assembly and its manufacturing method with publication number CN109623884A faces a problem that it is difficult to break through the limitations of the existing technology.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a reciprocating linear cutting electric shaver head, which has the characteristics of simple structure, small size, multi-function and good shaving performance.

[0005] To solve the above technical problems, the present invention provides a reciprocating linear cutting electric shaver head, comprising a fixed knife bracket and a fixed knife fixed on the fixed knife bracket, the fixed knife bracket being provided with support parts on the left and right sides respectively for supporting the fixed knife from the left and right sides, an internal cavity being formed between the fixed knife and the fixed knife bracket, a hair feeding groove for hair to enter the internal cavity being provided between the fixed knife and the fixed knife bracket, a moving knife which cooperates with the fixed knife and can reciprocate back and forth for cutting being provided in the internal cavity, a middle mounting hole being provided in the middle part of the top wall of the fixed knife, a middle knife net which passes through the middle mounting hole and protrudes above the top surface of the fixed knife being provided in the internal cavity, a middle knife which cooperates with the middle knife net and can reciprocate back and forth for cutting being provided below the middle knife net, the electric shaver head also comprising a transmission component connecting the moving knife and the middle knife to the power device of the electric shaver.

[0006] In the above-mentioned reciprocating linear cutting electric shaver head, the transmission component includes a movable knife bracket fixedly connected to the movable knife and the intermediate knife, and the movable knife bracket is connected to a driving seat for connecting to the power device of the electric shaver.

[0007] In a reciprocating linear cutting electric shaver head as described above, the movable knife support includes a first connecting portion facing downward, and a second connecting portion and a third connecting portion facing upward, the first connecting portion is used to connect to the drive seat, the second connecting portion is used to connect to the movable knife, and the third connecting portion is used to connect to the intermediate knife.

[0008] In the above-mentioned reciprocating linear cutting electric shaver head, the intermediate knife comprises a blade and a knife holder, and the blade is fixed on the knife holder.

[0009] In the reciprocating linear cutting electric shaver head as described above, the third connecting portion is a plug pin, and the razor holder is provided with a plug hole that is plugged into the third connecting portion.

[0010] In the reciprocating linear cutting electric shaver head as described above, an elastic member capable of pressing the movable knife onto the fixed knife is provided between the movable knife and the fixed knife support.

[0011] In the above-mentioned reciprocating linear cutting electric shaver head, the middle blade net is fixedly arranged relative to the fixed blade; or the middle blade net is floatingly arranged relative to the fixed blade.

[0012] As described above, in a reciprocating linear cutting electric shaver head, when the intermediate blade net is fixedly arranged relative to the fixed blade, the intermediate blade net is provided with an anti-slip limit portion which can be stuck on the bottom of the fixed blade, the intermediate blade is fixed on a transmission component, the intermediate blade supports the intermediate blade net and makes the anti-slip limit portion abut against the bottom of the fixed blade, or the anti-slip limit portion is directly fixed on the bottom of the fixed blade; when the intermediate blade net is floatingly arranged relative to the fixed blade, a guide frame is provided in the internal cavity, the intermediate blade net is movably connected to the guide frame up and down, the intermediate blade is movably connected to the transmission component up and down, and an elastic pressing member for elastically pressing the intermediate blade upward and lifting the intermediate blade net upward is provided between the intermediate blade and the transmission component.

[0013] Another technical problem to be solved by the present invention is to provide a fixed blade of an electric shaver head with reciprocating linear cutting having a simple structure.

[0014] In order to solve the above technical problems, the present invention provides a fixed blade of a reciprocating linear cutting electric shaver head, comprising a first wall and a second wall located at the front and rear sides of the first wall, the second wall is bent downward relative to the first wall to form a V-shaped or U-shaped upper mounting groove, a hair feeding groove located at the side is formed between the first wall and the second wall, and a fixed cutting tooth is formed between two adjacent hair feeding grooves, and a middle mounting hole is provided in the middle of the first wall for an intermediate component below the first wall to extend from the middle mounting hole above the first wall. The intermediate component here can be either a cutting component or a massage component.

[0015] As described above, the fixed blade of the reciprocating linear cutting electric shaver head has a rim around the middle mounting hole along the upper edge of the first wall.

[0016] In the fixed blade of the reciprocating linear cutting electric shaver head as described above, the edge is folded back and attached to the inner wall of the first wall.

[0017] As described above, the fixed knife of a reciprocating linear cutting electric shaver head has third walls bent downward on the left and right sides of the first wall, and on one end of the first wall, the third wall wraps around from the front side to the rear side of the first wall, and in the bent state, the second wall on the front side and the second wall on the rear side are spaced apart from each other front to back, and a notch is formed between the first wall, the second wall and the third wall.

[0018] In the fixed blade of a reciprocating linear cutting electric shaver head as described above, the third wall comprises a front wall portion, a rear wall portion, and a middle wall portion connecting the front wall portion and the rear wall portion, and the front wall portion, the rear wall portion and the middle wall portion are chamfered to transition therebetween.

[0019] Another technical problem to be solved by the present invention is to provide a method for manufacturing a reciprocating linear cutting electric shaver head, which has the characteristics of simple process, small size, multifunctionality and good shaving performance.

[0020] In order to solve the above technical problems, the present invention provides a method for manufacturing a reciprocating linear cutting electric shaver head, the method comprising:

[0021] A bracket is provided, including:

[0022] - a fixed knife bracket, wherein the fixed knife bracket has two front and rear support parts, and a mounting groove located between the two support parts, and a transmission member movement hole is provided in the middle of the mounting groove,

[0023] - a guide frame, wherein the guide frame is located in the mounting groove, the guide frame is fixed on the fixed knife bracket by injection molding, and the guide frame is located on the left and right sides of the transmission member movement hole,

[0024] An elastic member is provided, which has a central hole, is placed on the outer side of the guide frame from top to bottom, is positioned by the guide frame, and has elastic arms extending upwards on both sides of the guide frame.

[0025] Provide drive seat,

[0026] Provide moving knife assembly, including:

[0027] - a movable knife, the movable knife is a flat plate structure, has movable cutting teeth on at least one of the front and rear sides, and has a clearance hole in the middle,

[0028] - a movable knife support, comprising a first connection portion facing downward, and a second connection portion and a third connection portion facing upward, wherein the second connection portion is arranged on the left and right sides of the movable knife support, and the third connection portion is located between the second connection portions,

[0029] The second connection part is fixedly connected to the bottom of the movable knife, and the second connection parts on the left and right sides are located on the left and right sides of the clearance hole.

[0030] Providing an intermediate knife, the intermediate knife having an arched top and having arched cutting teeth on the arched top, passing the intermediate knife through the clearance hole and installing it on the third connecting part,

[0031] The driving seat is inserted from the bottom of the bracket, and the moving knife assembly is inserted from the top of the bracket through the first connecting part and / or the driving seat through the transmission member movement hole. The first connecting part is plug-connected and fixed with the driving seat and installed on the bracket.

[0032] The movable knife bracket is installed in the slide rail on the guide frame and is slidably connected to the guide frame left and right. The bottom of the movable knife located on the front and rear sides of the clearance hole is pressed on the elastic arm. In this assembled state, the top surface of the movable knife is slightly higher than the left and right supporting parts on the fixed knife bracket, and the movable knife bracket is elastically supported. The movable knife bracket has space for downward movement relative to the guide frame, and the intermediate knife protrudes from the clearance hole above the movable knife.

[0033] An intermediate knife net is provided, wherein the intermediate knife net is provided with an anti-dropping limiter.

[0034] A fixed knife is provided, which is made of a thin metal sheet. The front and rear side walls of the metal sheet are pre-bent to form a first wall located at the top and a bent second wall. After bending, a fixed cutting tooth corresponding to the movable cutting tooth is provided on at least one of the front and rear sides. A middle mounting hole is provided in the middle of the first wall.

[0035] The middle knife net and the fixed knife are independent of each other, and the middle knife net is put on the middle knife from above, and then the fixed knife is put on the outside of the middle knife net with the middle mounting hole facing the middle knife net, and the anti-slip limit part is pressed against the bottom surface of the first wall of the fixed knife, and the two second walls of the fixed knife are wrapped around the outside of the two supporting parts of the fixed knife bracket and fixed. After the fixed knife is fixed, its first wall is pressed on the moving knife, and the moving knife is pressed downward, and the middle knife net is pressed on the middle knife at the same time; or the middle knife net passes through the middle mounting hole and is pre-fixed on the first wall of the fixed knife by the anti-slip limit part, and then the fixed knife is connected to the fixed knife bracket, wherein the middle knife net is put on the middle knife, and the two second walls of the fixed knife are wrapped around the outside of the two supporting parts of the fixed knife bracket and fixed. After the fixed knife is fixed, its first wall is pressed on the moving knife, and the moving knife is pressed downward, and the middle knife net is pressed on the middle knife at the same time.

[0036] In the method for manufacturing a reciprocating linear cutting electric shaver head as described above, when the intermediate blade net and the fixed blade are independent, the intermediate blade is movably connected to the third connection part up and down, and an elastic pressing member is installed between the movable blade support and the intermediate blade. Preferably, the elastic pressing member is a spring sheet, and the movable blade assembly is first welded and fixed with the elastic pressing member, and then the movable blade is fixed to the second connection part.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] 1. The electric shaver head corresponding to the present invention adds a group of intermediate blade nets and the cutting structure of the intermediate blade in the middle of the fixed blade. First, the intermediate blade net protruding above the top of the fixed blade can make the top of the electric shaver head have a better skin-fitting effect; second, the electric shaver head has the performance of intermediate cutting, which improves the shaving efficiency and avoids increasing the manufacturing difficulty of the fixed blade; third, the separate intermediate blade net is easy to be made thinner due to its small size, so that the shaving is cleaner.

[0039] 2. The manufacturing method of the present invention is simple, and the electric shaver head produced can effectively ensure that the fixed blade and the movable blade are closely fitted, and the middle blade net and the middle blade are also closely fitted, and it is also ensured that the middle blade net and the middle blade can float relative to the fixed blade, thereby improving the cutting sharpness and the touch of the skin when shaving.

Brief Description of the Drawings

[0040] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0041] Figure 1 It is an exploded view of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0042] Figure 2It is a structural schematic diagram of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0043] Figure 3 It is a top view of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0044] Figure 4 is along Figure 3 Sectional view in the AA direction;

[0045] Figure 5 is along Figure 3 Cross-sectional view in the BB direction;

[0046] Figure 6 is along Figure 5 A partial enlarged view of point E in the middle;

[0047] Figure 7 It is an exploded view of a second embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0048] Figure 8 It is a structural schematic diagram of a second embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0049] Fig. 9 is a top view of a second embodiment of a reciprocating linear cutting electric shaver head of the present invention;

[0050] Fig.10 is along Fig. 9 Cross-sectional view in CC direction;

[0051] Fig.11 is along Fig. 9 Cross-sectional view in the middle DD direction;

[0052] Fig.12 It is a structural schematic diagram of an embodiment of a reciprocating linear cutting electric shaver head with two intermediate blade nets of the present invention;

[0053] Fig.13 is a schematic structural diagram of a movable knife support corresponding to an embodiment of the present invention having two intermediate knife nets;

[0054] Fig.14 It is a structural schematic diagram of an embodiment of a fixed knife;

[0055] Fig.15 yes Fig.14 A schematic structural diagram of an embodiment of an electric shaver head corresponding to the fixed blade in FIG.

[0056] Fig.16It is a structural schematic diagram of components corresponding to a method for manufacturing a reciprocating linear cutting electric shaver head of the present invention;

[0057] Fig.17 This is a schematic diagram of installing the moving knife assembly, the intermediate knife, and the driving seat on the bracket;

[0058] Fig.18 It is a schematic diagram of the installation of a structure in which the middle knife net is independent of the fixed knife;

[0059] Fig.19 It is a schematic diagram of the installation of the structure for fixing the middle knife net on the fixed knife;

[0060] Fig. 20 This is a schematic diagram of the installation of the fixed knife. [Specific implementation method]

[0061] The present invention will be further described below in conjunction with the accompanying drawings:

[0062] like Figures 1 to 15 The electric shaver head for reciprocating linear cutting shown in the figure comprises a fixed knife support 1 and a fixed knife 2 fixed on the fixed knife support 1, the fixed knife support 1 is provided with supporting parts 11 for supporting the fixed knife 2 from the left and right sides respectively, an internal cavity 10 is formed between the fixed knife 2 and the fixed knife support 1, a hair feeding groove 25 for hair to enter the internal cavity 10 is provided between the fixed knife 2 and the fixed knife support 1, a movable knife 3 which cooperates with the fixed knife 2 and can reciprocate back and forth for cutting is provided in the internal cavity 10, a middle mounting hole 21 is provided in the middle of the top wall of the fixed knife 2, a middle knife net 4 which passes through the middle mounting hole 21 and protrudes above the top surface of the fixed knife 2 is provided in the internal cavity 10, and a middle knife 5 which cooperates with the middle knife net 4 and can reciprocate back and forth for cutting is provided below the middle knife net 4, and the electric shaver head also includes a transmission component 6 connecting the movable knife 3 and the middle knife 5 to the power device of the electric shaver. The present invention adds a group of intermediate blade nets and the cutting structure of the intermediate blade in the middle of the fixed blade 2. First, the intermediate blade net protruding above the top of the fixed blade 2 can make the top of the electric shaver head have a better skin-fitting effect; second, the electric shaver head has the performance of intermediate cutting, which improves the shaving efficiency and avoids increasing the manufacturing difficulty of the fixed blade 2; third, the separate intermediate blade net 4 is easy to be made thinner due to its small size, so that the shaving is cleaner.

[0063] In order to facilitate the installation and connection with the external handle, such as Figures 1 to 5 As shown, a mounting seat 100 is provided on the outer side of the structure formed by the fixed knife bracket 1 and the fixed knife 2 for mounting on the handle.

[0064] A clearance hole 31 is provided in the middle of the movable knife 3 for making way for the middle knife net 4 during the forward and backward reciprocating linear motion, so as to prevent the movable knife 3 from colliding with the middle knife net 4 during the forward and backward reciprocating motion.

[0065] In order to make the movable knife 3 better attached to the bottom of the fixed knife 2 and improve the sharpness of the cutting, as Figure 1 , 7 As shown in Figures 11 and 11 , an elastic member 7 is provided between the movable knife 3 and the fixed knife bracket 1 , which can press the movable knife 3 onto the fixed knife 2 .

[0066] As a preferred embodiment of the transmission component, Figure 1 , 5 As shown in FIGS. 7 and 10, the transmission component 6 includes a movable knife bracket 61 fixedly connected to the movable knife 3 and the intermediate knife 5, and a driving seat 62 for connecting to a power device of the electric shaver is connected to the movable knife bracket 61. In order to facilitate the directional movement of the movable knife bracket 61, a guide frame 8 is provided in the internal cavity 10, and the guide frame 8 includes a guide groove 81 for guiding the movable knife bracket 61 to slide forward and backward.

[0067] The movable knife bracket 61 includes a first connecting portion 611 facing downward, and a second connecting portion 612 and a third connecting portion 613 facing upward. The first connecting portion 611 is used to connect with the driving seat 62, the second connecting portion 612 is used to connect with the movable knife 3, and the third connecting portion 613 is used to connect with the middle knife 5. The structure is simple and it is convenient to drive the movable knife 3 and the middle knife 5 to reciprocate back and forth.

[0068] As a preferred embodiment of the intermediate knife 5, Figure 1 , 4 As shown in Figures 5, 7, 10 and 11, the intermediate knife 5 comprises a blade 51 and a knife holder 52, and the blade 51 is fixed on the knife holder 52. The blade 51 has a first leg and a second leg, and an arched portion located between the first leg and the second leg, the arched portion is located above the knife holder and has an arched cutting tooth thereon, the knife holder is used to connect and drive with the movable knife support 61, and at the same time, the blade is supported by the connection between the knife holder and the first leg and the second leg so that the shape of the arched portion is fixed and the cutting teeth located in the middle are formed, and the blade is small in size so as to be conveniently placed in the middle of the movable knife.

[0069] As a preferred connection method between the third connection part 613 and the intermediate knife 5, the third connection part 613 is a pin, and the knife holder 52 is provided with a plug hole 53 plugged with the third connection part 613, which has a simple structure and is easy to assemble.

[0070] As an implementation method of the intermediate knife net 4, the intermediate knife net 4 is fixedly arranged relative to the fixed knife 2. Figure 1 , 4As shown in Figures 5 and 6, the intermediate knife net 4 is provided with an anti-slip limiter 43 that can be stuck on the bottom of the fixed knife 2. The intermediate knife 5 is fixed on the transmission component 6. The intermediate knife 5 supports the intermediate knife net 4 and makes the anti-slip limiter 43 close to the bottom of the fixed knife 2, or the anti-slip limiter 43 is directly fixed to the bottom of the fixed knife 2 by bonding, welding or welding. The anti-slip limiter 43 can be a plastic part fixed on the lower part of the intermediate knife net 4, or a metal integrally formed with the intermediate knife net 4, and has a simple structure.

[0071] As another embodiment of the intermediate blade net 4, the intermediate blade net 4 is arranged to float relative to the fixed blade 2, so that it can float to a certain extent according to the skin surface and the force application method, thereby improving the skin-fitting effect and comfort. Figure 7 , 10 As shown in Figures 11, the intermediate knife net 4 is movably connected to the guide frame 8 up and down, the intermediate knife 5 is movably connected to the transmission component 6 up and down, and an elastic pressing member 9 is provided between the intermediate knife 5 and the transmission component 6 for elastically pressing the intermediate knife 5 upward and lifting the intermediate knife net 4 upward. Preferably, the elastic pressing member 9 is a spring and is sleeved on the third connecting part 613, with a simple structure and easy assembly.

[0072] The guide frame 8 is provided with a limit groove 82 for the upper and lower movable limit of the middle knife net 4, the middle knife net 4 is provided with a knife net frame 41, and the knife net frame 41 is provided with a limit strip 42 inserted into the limit groove 82. Figure 7 and Fig.10 In the illustrated embodiment, the limit strip also serves as an anti-slip limit portion to prevent the middle knife net from slipping out of the fixed knife.

[0073] In a preferred embodiment, the fixed knife support is a rigid support, and the cross section of the fixed knife support is an arcuate shape. The fixed knife is a flexible metal sheet. The flexible metal sheet is used to support the edges on the left and right sides of the fixed knife support. The fixed knife is bent and tightened along the outer side of the arcuate shape of the fixed knife support under the action of a certain external force, and the side of the fixed knife is fixed to the side or bottom surface of the fixed knife support by welding, riveting or pasting. The initial shape of the fixed knife in the process can be a flat plate structure or pre-bent on the left and right sides. The left and right ends of the fixed knife are fixed to the fixed knife support to form a structure similar to a bow and a bowstring, so that the fixed knife can obtain a very flat cutting working surface that contacts the moving knife without the need for additional precision processing, and the size is small and compact; in addition, the thickness of the fixed knife can be made thinner than other process structures. Of course, for the electric shaver head with reciprocating linear cutting, the structure of the fixed knife and the fixed knife support and the combination of the two can also adopt other forms.

[0074] The invention has a simple structure, a small volume and better shaving performance.

[0075] In the present invention, the intermediate knife net 4 may have one, such as Figures 1 to 11 ,as well as Fig.14 and Fig.15 In the embodiment shown, there are two or more intermediate knife nets 4, such as Fig.12 The embodiment shown in FIG. 1 has two intermediate blade nets 4, and the corresponding intermediate blades 5 have two groups. The transmission component 6 realizes driving by arranging two groups of third connecting parts 613 on the movable blade support 61 to respectively connect the two groups of intermediate blades 5. Fig.13 As shown, the structure is simple and the shaving range is large.

[0076] About the preferred embodiment of the fixed knife, as Figure 1 and Fig.14 The fixed knife of a reciprocating linear cutting electric shaver head shown in the figure includes a first wall 22 and a second wall 23 located on the front and rear sides of the first wall 22, the second wall 23 is bent downward relative to the first wall 22 and forms a V-shaped or U-shaped upper mounting groove 24, a hair feed groove 25 located on the side is formed between the first wall 22 and the second wall 23, and a fixed cutting tooth 26 is formed between two adjacent hair feed grooves 25, and the middle mounting hole 21 is arranged in the middle part of the first wall 22, and its length is between one half and three quarters of the length of the entire first wall 22.

[0077] like Figure 1 , Figure 5 and Figure 6 In the illustrated embodiment, a rim 27 is provided on the first wall 22 around the middle mounting hole 21 , so that the first wall 22 can be made very thin while the edge of the middle mounting hole 21 has a good structural strength to prevent tearing from the edge of the middle mounting hole 21 .

[0078] Preferably, the edge 27 is folded back and attached to the inner wall of the first wall 22 .

[0079] like Fig.14 In the embodiment shown, the left and right sides of the first wall 22 are provided with a third wall 29 bent downward. At one end of the first wall 22, the third wall 29 surrounds from the front side to the rear side of the first wall 22. In the bent state, the second wall 23 on the front side and the second wall 23 on the rear side are arranged to be spaced apart from each other, and a notch 28 is formed between the first wall 22, the second wall 23 and the third wall 29 for installing the fixed knife bracket 1. The electric shaver head formed by the fixed knife, as shown in FIG. Fig.15 As shown, the fixed knife can be wrapped around the upper end of the fixed knife bracket 1 to form a drum-like structure, so that the top surface of the entire knife head and the adjacent surroundings have a smooth transition and good skin-fitting property.

[0080] Preferably, the third wall 29 includes a wall front portion 291 , a wall rear portion 292 , and a wall middle portion 293 connecting the wall front portion 291 and the wall rear portion 292 , and the wall front portion 291 , the wall rear portion 292 and the wall middle portion 293 are chamfered to transition therebetween.

[0081] like Figures 16 to 18 A method for manufacturing a reciprocating linear cutting electric shaver head is shown, the method comprising:

[0082] A bracket is provided, including:

[0083] - a fixed knife support 1, wherein the fixed knife support 1 has two front and rear support parts 11, and a mounting groove 12 located between the two support parts 11, and a transmission member movement hole 13 is provided in the middle of the mounting groove 12,

[0084] - a guide frame 8, wherein the guide frame 8 is located in the mounting groove 12, the guide frame 8 is fixed on the fixed knife bracket 1 by injection molding, and the guide frame 8 is located on the left and right sides of the transmission member movement hole 13,

[0085] An elastic member 7 is provided, which has a central hole, is placed on the outer side of a guide frame 8 from top to bottom, and is positioned front, back, left, and right by the guide frame 8, and has elastic arms 71 extending upwards on both sides of the guide frame 8.

[0086] A drive seat 62 is provided for connecting to a power device of the electric razor.

[0087] Provide moving knife assembly, including:

[0088] - a movable knife 3, which can be placed in the mounting groove 12 as a whole, has movable cutting teeth 32 on at least one of the front and rear sides, and has a clearance hole 31 in the middle,

[0089] - a movable knife support 61, which includes a first connection portion 611 facing downward, and a second connection portion 612 and a third connection portion 613 facing upward, wherein the second connection portion 612 is arranged on the left and right sides of the movable knife support 61, and the third connection portion 613 is located between the second connection portions 612,

[0090] The second connection part 612 is fixedly connected to the bottom of the movable knife 3, and the second connection parts 612 on the left and right sides are located on the left and right sides of the clearance hole 31.

[0091] Provide an intermediate knife 5, wherein the intermediate knife 5 has an arched top and an arched cutting tooth 54 on the arched top, pass the intermediate knife 5 through the clearance hole 31 and install it on the third connecting portion 613,

[0092] The driving seat 62 is inserted from the bottom of the bracket, and the moving knife assembly is inserted from the top of the bracket through the first connecting portion 611 and / or the driving seat 62 through the transmission member movement hole 13. The first connecting portion 611 and the driving seat 62 are plugged and connected and fixed together, and are installed on the bracket.

[0093] The movable knife bracket 61 is installed in the slide rail on the guide frame 8 and is slidably connected to the guide frame 8 left and right. The bottom of the movable knife 3 located on the front and rear sides of the clearance hole 31 is pressed on the elastic arm 71. In this assembled state, the top surface of the movable knife 3 is slightly higher than the left and right support parts 11 on the fixed knife bracket 1, and the movable knife bracket 61 is elastically supported. The movable knife bracket 61 has space for downward movement relative to the guide frame 8, and the intermediate knife 5 protrudes from the clearance hole 31 above the movable knife 3.

[0094] An intermediate knife net 4 is provided, wherein the intermediate knife net 4 is provided with an anti-dropping limiter 43.

[0095] A fixed blade 2 is provided, which is made of a thin metal sheet, and the material thickness is preferably less than 0.15 mm. The front and rear side walls of the metal sheet are pre-bent to form a first wall located at the top and a second wall bent from the front and rear sides. After bending, a fixed cutting tooth corresponding to the dynamic cutting tooth 32 is provided on at least one of the front and rear sides. A middle mounting hole 21 is provided in the middle of the first wall.

[0096] Among them, the middle knife net 4 and the fixed knife 2 are independent, the middle knife net 4 is put on the middle knife 5 from above, and then the middle mounting hole 21 is facing the middle knife net 4 to put the fixed knife 2 on the outside of the middle knife net 4, and the anti-slip limit part 43 is abutted against the bottom surface of the first wall of the fixed knife 2, and the two second walls of the fixed knife are wrapped tightly and fixed on the outside of the two supporting parts 11 of the fixed knife bracket 1. After the fixed knife 2 is fixed, its first wall is pressed on the movable knife 3, and the movable knife 3 is pressed downward, and the middle knife net 4 is pressed on the middle knife 5 at the same time.

[0097] In this method, the connection mode of the intermediate knife 5 and the movable knife bracket 61 is to flexibly connect the intermediate knife 5 up and down on the third connection part 613, and install an elastic pressing member 9 between the movable knife bracket 61 and the intermediate knife 5. The elastic pressing member 9 can be a spring. When installing the intermediate knife 5, the elastic pressing member 9 is first sleeved on the third connection part 613, and the elastic pressing member 9 is confined on the movable knife bracket 61 through the intermediate knife 5. Alternatively, the elastic pressing member 9 is a spring sheet, which can reduce the installation space required for the elastic pressing member 9 while ensuring the elastic force, thereby effectively reducing the volume of the electric shaver head. The movable knife assembly is first welded and fixed with the elastic pressing member 9, and then the movable knife 3 is fixed on the second connection part 612.

[0098] In the above process, the method of fixing the fixed knife 2 on the fixed knife bracket 1 is preferably as follows: Fig. 20As shown, the fixed knife is sleeved on the outer side of the fixed knife bracket 1 to obtain a pre-assembled product, and an assembly table is provided to match the top surface of the fixed knife of the electric shaver head and the middle knife net 4 exposed above the top surface of the fixed knife. The pre-assembled product is turned over, and the top surface of the fixed knife and the middle knife net 4 exposed above the top surface of the fixed knife are placed on the assembly table with the top surface of the fixed knife facing downward. With the assembly table as the bottom support, the bracket is pressed down and the tops of the two supporting parts 11 on the fixed knife bracket 1 are pressed on the fixed knife, and at the same time, the movable knife 3 and the middle knife 5 are lifted from the floating position. The state is pressed down, and then the second wall of the fixed knife located outside the two supporting parts 11 is bent twice around the top of the supporting part 11 and pushed on the supporting part 11. During the pushing process, the thrust F generates a component force F1 that presses the second wall firmly on the supporting part 11, and a component force F2 that pushes and pulls the second wall and transmits it to the first wall to stretch the first wall outward, so that the first wall is tightened between the two supporting parts 11, and then welding and bonding are carried out to fix it, and then the pushing is released, and the fixed finished product is removed from the assembly table.

[0099] The manufacturing method of the present invention has a simple process, and the electric shaver head produced can effectively ensure that the fixed blade and the movable blade are closely fitted, and at the same time, the middle blade net 4 and the middle blade 5 are closely fitted, and it is also ensured that the middle blade net 4 and the middle blade 5 can float relative to the fixed blade, thereby improving the cutting sharpness and the touch of the skin when shaving.

[0100] like Fig.19 Another method for manufacturing a reciprocating linear cutting electric shaver head is shown, which differs from the method of the first embodiment mentioned above in that: the intermediate knife net 4 passes through the intermediate mounting hole 21, is pre-fixed on the first wall of the fixed knife 2 by the anti-slip limit portion 43, and then the fixed knife is connected to the fixed knife bracket 1, wherein the intermediate knife net 4 is sleeved on the intermediate knife 5, and the two second walls of the fixed knife are wrapped tightly and fixed on the outside of the two supporting portions 11 of the fixed knife bracket 1, after the fixed knife 2 is fixed, its first wall is pressed on the movable knife 3, and the movable knife 3 is pressed downward, and at the same time the intermediate knife net 4 is pressed on the intermediate knife 5, thereby obtaining an electric shaver head with the intermediate knife net fixed relative to the fixed knife.

Claims

1. A reciprocating linear cutting electric shaver head, characterized in that: The invention comprises a fixed knife support (1) and a fixed knife (2) fixed on the fixed knife support (1), wherein the fixed knife support (1) is provided with support parts (11) on the left and right sides respectively for supporting the fixed knife (2) from the left and right sides, an internal cavity (10) is formed between the fixed knife (2) and the fixed knife support (1), a hair inlet groove (25) is provided between the fixed knife (2) and the fixed knife support (1) for allowing hair to enter the internal cavity (10), a movable knife (3) is provided in the internal cavity (10) and cooperates with the fixed knife (2) and can reciprocate back and forth to perform cutting, a middle mounting hole (21) is provided in the middle of the top wall of the fixed knife (2), a middle knife net (4) is provided in the internal cavity (10) and passes through the middle mounting hole (21) and protrudes above the top surface of the fixed knife (2), and a movable knife net (3) is provided below the middle knife net (4) and cooperates with the middle knife net (4) and can reciprocate back and forth to perform cutting The electric shaver head further comprises a transmission component (6) for connecting the movable blade (3) and the intermediate blade (5) to a power device of the electric shaver, the transmission component (6) comprising a movable blade support (61) fixedly connected to the movable blade (3) and the intermediate blade (5), the movable blade support (61) being connected to a driving seat (62) for connecting to the power device of the electric shaver, the movable blade support (61) comprising a first connecting portion (611) facing downwards, and a second connecting portion (612) and a third connecting portion (613) facing upwards, the first connecting portion (611) being used to connect to the driving seat (62), the second connecting portion (612) being used to connect to the movable blade (3), and the third connecting portion (613) being used to connect to the intermediate blade (5), the fixed blade support (1) being a rigid support, and the fixed blade (2) being a flexible metal sheet.

2. The reciprocating linear cutting electric shaver head according to claim 1, characterized in that: The intermediate knife (5) comprises a blade (51) and a blade holder (52), and the blade (51) is fixed on the blade holder (52).

3. The reciprocating linear cutting electric shaver head according to claim 2, characterized in that: The third connection part (613) is a plug pin, and the tool holder (52) is provided with a plug hole (53) plugged into the third connection part (613).

4. The reciprocating linear cutting electric shaver head according to claim 1, characterized in that: An elastic member (7) capable of pressing the movable knife (3) against the fixed knife (2) is provided between the movable knife (3) and the fixed knife bracket (1).

5. A reciprocating linear cutting electric shaver head according to any one of claims 1 to 4, characterized in that: The intermediate knife net (4) is fixedly arranged relative to the fixed knife (2).

6. The reciprocating linear cutting electric shaver head according to claim 5, characterized in that: The intermediate knife net (4) is provided with an anti-slip limit portion (43) that can be stuck on the bottom of the fixed knife (2); the intermediate knife (5) is fixed on the transmission component (6); the intermediate knife (5) supports the intermediate knife net (4) and makes the anti-slip limit portion (43) abut against the bottom of the fixed knife (2), or the anti-slip limit portion (43) is directly fixed on the bottom of the fixed knife (2).

7. A reciprocating linear cutting electric shaver head according to any one of claims 1 to 4, characterized in that: The intermediate knife net (4) is arranged to float relative to the fixed knife (2).

8. The reciprocating linear cutting electric shaver head according to claim 7, characterized in that: A guide frame (8) is provided in the internal cavity (10), the intermediate knife net (4) is movably connected to the guide frame (8) in an up-and-down manner, the intermediate knife (5) is movably connected to the transmission component (6) in an up-and-down manner, and an elastic pressing member (9) is provided between the intermediate knife (5) and the transmission component (6) for elastically pressing the intermediate knife (5) upward and lifting the intermediate knife net (4) upward.

9. A fixed blade of a reciprocating linear cutting electric shaver head, characterized in that: The invention comprises a first wall (22) and a second wall (23) located at the front and rear sides of the first wall (22); the second wall (23) is bent downward relative to the first wall (22) to form a V-shaped or U-shaped upper mounting groove (24); a side feed groove (25) is formed between the first wall (22) and the second wall (23); a fixed cutting tooth (26) is formed between two adjacent feed grooves (25); a middle mounting hole (21) is provided in the middle of the first wall (22) for allowing an intermediate component below the first wall (22) to be inserted from the middle mounting hole (21) The middle mounting hole (21) extends above the first wall (22); a third wall (29) bent downward is provided on the left and right sides of the first wall (22); on one end of the first wall (22), the third wall (29) surrounds the first wall (22) from the front side to the rear side; in the bent state, the second wall (23) on the front side and the second wall (23) on the rear side are arranged to be spaced apart from each other in front and back, and a notch (28) is formed between the first wall (22), the second wall (23) and the third wall (29); and the fixed knife (2) is a flexible metal sheet.

10. The fixed blade of a reciprocating linear cutting electric shaver head according to claim 9, characterized in that: The first wall (22) is provided with a rim (27) around the middle mounting hole (21).

11. The fixed blade of a reciprocating linear cutting electric shaver head according to claim 10, characterized in that: The edge (27) is folded back and attached to the inner wall of the first wall (22).

12. The fixed blade of a reciprocating linear cutting electric shaver head according to claim 9, characterized in that: The third wall (29) includes a front wall portion (291), a rear wall portion (292), and a middle wall portion (293) connecting the front wall portion (291) and the rear wall portion (292), and the front wall portion (291), the rear wall portion (292) and the middle wall portion (293) are chamfered to transition therebetween.

13. A method for manufacturing a reciprocating linear cutting electric shaver head, the method comprising: A bracket is provided, including: - a fixed knife support (1), the fixed knife support (1) having two front and rear support parts (11), and a mounting groove (12) located between the two support parts (11), and a transmission member movement hole (13) is provided in the middle of the mounting groove (12), - a guide frame (8), wherein the guide frame (8) is located in the mounting groove (12), the guide frame (8) is fixed on the fixed knife bracket (1) by injection molding, and the guide frame (8) is located on the left and right sides of the transmission member movement hole (13), An elastic member (7) is provided, which has a central hole, is placed on the outer side of the guide frame (8) from top to bottom, is positioned by the guide frame (8), and has elastic arms (71) extending upwards and located at the front and rear sides of the guide frame (8). Providing a drive seat (62), Provide moving knife assembly, including: - a movable knife (3), the movable knife (3) being able to be placed in its entirety in the mounting groove (12), having movable cutting teeth (32) on at least one of the front and rear sides, and having a clearance hole (31) in the middle, - a movable knife support (61), comprising a first connecting portion (611) facing downward, and a second connecting portion (612) and a third connecting portion (613) facing upward, wherein the second connecting portion (612) is arranged on the left and right sides of the movable knife support (61), and the third connecting portion (613) is located between the second connecting portions (612), The second connection part (612) is fixedly connected to the bottom of the movable knife (3), and the second connection parts (612) on the left and right sides are located on the left and right sides of the clearance hole (31). Providing an intermediate knife (5), wherein the intermediate knife (5) has an arched top and an arched cutting tooth (54) on the arched top, passing the intermediate knife (5) through the clearance hole (31) and installing it on the third connecting part (613), The driving seat (62) is inserted from the bottom of the bracket, and the moving knife assembly is inserted from the top of the bracket through the first connecting portion (611) and / or the driving seat (62) through the transmission member movement hole (13), the first connecting portion (611) and the driving seat (62) are plugged and connected and fixed together, and are installed on the bracket, The movable knife bracket (61) is installed in the slide rail on the guide frame (8) and is connected to the guide frame (8) by sliding left and right. The bottom of the movable knife (3) located on the front and rear sides of the clearance hole (31) is pressed on the elastic arm (71). In this assembled state, the top surface of the movable knife (3) is slightly higher than the left and right supporting parts (11) on the fixed knife bracket (1), and the movable knife bracket (61) is elastically supported. The movable knife bracket (61) has space for downward movement relative to the guide frame (8). The intermediate knife (5) protrudes from the clearance hole (31) above the movable knife (3). An intermediate knife net (4) is provided, wherein the intermediate knife net (4) is provided with an anti-dropping limiting portion (43). A fixed blade (2) is provided, which is made of a thin metal sheet. The front and rear side walls of the metal sheet are pre-bent to form a first wall located at the top and a bent second wall. After bending, a fixed cutting tooth corresponding to the movable cutting tooth (32) is provided on at least one of the front and rear sides. A middle mounting hole (21) is provided in the middle of the first wall. The intermediate knife net (4) and the fixed knife (2) are independent of each other, the intermediate knife net (4) is put on the intermediate knife (5) from above, and then the intermediate mounting hole (21) is facing the intermediate knife net (4), and the fixed knife (2) is put on the outside of the intermediate knife net (4), and the anti-drop limit part (43) is pressed against the bottom surface of the first wall of the fixed knife (2), and the two second walls of the fixed knife are wrapped around the outside of the two supporting parts (11) of the fixed knife bracket (1) and fixed, and after the fixed knife (2) is fixed, its first wall is pressed on the movable knife (3), and the movable knife (3) is pressed downward, and at the same time, the intermediate knife net (4) is pressed On the middle knife (5); or, the middle knife net (4) passes through the middle mounting hole (21) and is pre-fixed on the first wall of the fixed knife (2) through the anti-slip limiter (43), and then the fixed knife (2) is connected to the fixed knife bracket (1), wherein the middle knife net (4) is sleeved on the middle knife (5), and the two second walls of the fixed knife (2) are wrapped tightly and fixed on the outside of the two supporting parts (11) of the fixed knife bracket (1), and after the fixed knife (2) is fixed, its first wall is pressed on the movable knife (3), and the movable knife (3) is pressed downward, and at the same time, the middle knife net (4) is pressed on the middle knife (5).

14. A method for manufacturing a reciprocating linear cutting electric shaver head according to claim 13, wherein when installing the fixed knife, the fixed knife is placed on the outside of the fixed knife bracket (1) to obtain a pre-assembled product, an assembly table is provided to match the top surface of the fixed knife of the electric shaver head and the middle knife net (4) exposed above the top surface of the fixed knife, the pre-assembled product is turned over, and the top surface of the fixed knife and the middle knife net (4) exposed above the top surface of the fixed knife are placed on the assembly table with the top surface of the fixed knife facing downward, and the bracket is pressed down with the assembly table as the bottom support so that the tops of the two support parts (11) on the fixed knife bracket (1) are pressed on the fixed knife The movable knife (3) and the intermediate knife (5) are pressed down from the floating state at the same time, and then the second wall of the fixed knife located outside the two supporting parts (11) is bent twice around the top of the supporting part (11) and pushed on the supporting part (11). During the pushing process, the thrust F generates a component force F1 that presses the second wall firmly on the supporting part (11), and a component force F2 that pushes and pulls the second wall and transmits it to the first wall of the fixed knife to cause the first wall to generate outward stretching, so that the first wall is tightened between the two supporting parts (11). Then, welding and bonding are performed to fix, and then the pushing is released, and the fixed finished product is removed from the assembly table.

15. A method for manufacturing a reciprocating linear cutting electric shaver head according to claim 13, when the intermediate blade net (4) and the fixed blade (2) are independent, the intermediate blade (5) is movably connected to the third connecting part (613) up and down, and an elastic pressing piece (9) is installed between the movable blade bracket (61) and the intermediate blade (5).

16. According to a method for manufacturing a reciprocating linear cutting electric shaver head as described in claim 15, the elastic top pressure piece (9) is a spring sheet, and the movable knife assembly therein is firstly welded and fixed with the elastic top pressure piece (9), and then the movable knife (3) is fixed on the second connecting part (612).

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