WO2023083166A1

WO2023083166A1 - Fixed blade, and electric razor blade cartridge applying same and manufacturing method therefor

Info

Publication number: WO2023083166A1
Application number: PCT/CN2022/130567
Authority: WO
Inventors: 吴让攀
Original assignee: 中山市小石陶瓷刀片有限公司
Priority date: 2021-11-09
Filing date: 2022-11-08
Publication date: 2023-05-19
Also published as: CN114043533A

Abstract

A reciprocating type linear-cutting electric razor blade cartridge, comprising a fixed blade holder (1) and a fixed blade (2). The fixed blade holder is provided with left and right supporting parts (11) for supporting the fixed blade from the two sides; an inner containing cavity (10) is formed between the fixed blade and the fixed blade holder; hair inlet grooves (25) are formed between the fixed blade and the fixed blade holder; a movable blade (3) matched with the fixed blade is provided in the inner containing cavity; a middle mounting hole (21) is formed in the middle of the top wall of the fixed blade; a middle blade net (4) which penetrates through the middle mounting hole and protrudes above the top surface of the fixed blade is provided in the inner containing cavity; and a middle blade (5) which is matched with the middle blade net and can reciprocate back and forth for cutting is provided below the middle blade net. The electric razor blade cartridge further comprises a transmission component (6) which is used for connecting the movable blade and the middle blade with a power device of an electric razor. The electric razor blade cartridge is simple in structure and small in size, and has the cutting function part protruding from the middle and provided above the fixed blade, thereby achieving good cutting performance. Further provided are a fixed blade of the reciprocating type linear-cutting electric razor blade cartridge, and a method for manufacturing the reciprocating type linear-cutting electric razor blade cartridge.

Description

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

【Technical field】

The invention relates to a fixed knife for a reciprocating linear cutting electric razor head. The invention also relates to a reciprocating linear cutting electric razor head. The present invention also relates to a reciprocating linear cutting electric razor head. The hairy knife method.

【Background technique】

The existing reciprocating linear motion razor heads usually have the characteristics of small size, flexible use, and sharp cutting. Generally, the fixed knife is fixed by the fixed knife bracket to form a cavity for the linear movement of the movable knife, and then Form a cutting surface on the top surface of the fixed knife, and cut from the left and right sides. This type of reciprocating razor head, because the fixed knife is fixed on the fixed knife bracket from both sides by metal sheet, the fixed knife is an integral structure, and the fixed knife is made of a very thin metal sheet, Usually the thickness is the same, that is, there is only one thickness when cutting. Although it satisfies the cutting requirements well, the function is relatively single, and the user experience needs to be further improved. However, due to its small size, in the industry of reciprocating razors, it is generally believed that the design space for this type of product is already very small. The connection structure between the knife brackets, the cooperation between the moving knife and the fixed knife and the fixed knife bracket do some specific optimization designs, such as the patent of the blade group and its manufacturing method with the publication number CN109623884A, a problem faced is exactly difficult to break through the existing Technology limitations.

The present invention is made based on this situation.

【Content of invention】

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

In order to solve the above technical problems, the present invention provides a reciprocating linear cutting electric shaving head, comprising a fixed knife bracket and a fixed knife fixed on the fixed knife bracket, and the left and right sides of the fixed knife bracket are respectively provided with The support portion of the fixed knife supported from the left and right sides, an inner cavity is formed between the fixed knife and the fixed knife bracket, and a hair feeding groove for hair to enter the inner cavity is provided between the fixed knife and the fixed knife bracket , the internal cavity is provided with a moving knife that cooperates with the fixed knife and can reciprocate back and forth for cutting. The middle part of the top wall of the fixed knife is provided with an intermediate mounting hole, and the internal cavity is provided with a mounting hole that passes through the middle. holes and protrude from the middle knife net above the top surface of the fixed knife. Below the middle knife net is a middle knife that cooperates with the middle knife net and can reciprocate back and forth for cutting. The electric shaver head also includes a moving The transmission part that connects the knife and the middle knife to the power unit of the electric razor.

As described above, a reciprocating linear cutting electric shaver head, the transmission part includes a movable knife bracket fixedly connected with the movable knife and the middle knife, and the dynamic knife bracket is connected with a power device for connecting with the electric shaver. Connected driver base.

As described above, a reciprocating linear cutting electric shaver head, the moving knife bracket includes a downward first connecting portion, and an upward second connecting portion and a third connecting portion, the first connecting portion The part is used for connecting with the driving seat, the second connecting part is used for connecting with the movable knife, and the third connecting part is used for connecting with the middle knife.

According to the reciprocating linear cutting electric shaver head, the middle knife includes a blade and a knife frame, and the blade is fixed on the knife frame.

In the reciprocating linear cutting electric shaving head as described above, the third connection part is a pin, and the tool holder is provided with an insertion hole to be inserted into the third connection part.

In the reciprocating linear cutting electric razor head described above, an elastic member capable of pressing the moving knife against the fixed knife is provided between the moving knife and the fixed knife support.

In the reciprocating linear cutting electric shaving head described above, the middle knife net is fixedly arranged relative to the fixed knife; or the middle knife net is arranged floatingly relative to the fixed knife.

According to the reciprocating linear cutting electric razor head as described above, when the middle knife net is fixed relative to the fixed knife, the middle knife net is provided with an anti-off limiting part that can be stuck on the bottom of the fixed knife , the middle knife is fixed on the transmission part, the middle knife supports the middle knife net and makes the anti-off limit part abut against the bottom of the fixed knife, or the anti-off limit part is directly fixed on the bottom of the fixed knife Above; when the middle knife net is floating relative to the fixed knife, a guide frame is provided in the inner cavity, the middle knife net is movably connected to the guide frame up and down, and the middle knife is movably connected to the transmission part up and down , and an elastic pressing member for elastically pressing the middle knife upward and lifting the middle knife net upward is provided between the middle knife and the transmission part.

Another technical problem to be solved by the present invention is to provide a fixed knife of a reciprocating linear cutting electric shaver head with a simple structure.

In order to solve the above-mentioned technical problems, the present invention provides a fixed knife of a reciprocating linear cutting electric shaving head, comprising a first wall and second walls located on the front and rear sides of the first wall, and the second wall is opposite to the first wall. Bending downwards to form a V-shaped or U-shaped installation groove, a hair-feeding groove on the side is formed between the first wall and the second wall, and fixed cutting teeth are formed between two adjacent hair-feeding grooves, An intermediate mounting hole is provided in the middle of the first wall for the intermediate member below the first wall to protrude above the first wall from the intermediate mounting hole. The intermediate member here can be both a cutting member and a massaging member.

According to the above-mentioned fixed knife of a reciprocating linear cutting electric shaving head, the first wall is provided with hemming along the periphery of the middle installation hole.

In the above-mentioned fixed knife of a reciprocating linear cutting electric shaving head, the wrapping edge is folded back and attached to the inner wall of the first wall.

In the fixed knife of a reciprocating linear cutting electric razor head as described above, the left and right sides of the first wall are provided with a third wall bent downward, and on one end of the first wall, the The third wall surrounds from the front side of the first wall to the rear side. 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. Notches are formed between the walls.

In the fixed knife of a reciprocating linear cutting electric razor head as described above, the third wall includes a front wall, a rear wall, and a middle wall connecting the front wall and the rear wall, and the wall Round transitions between the front and back of the wall to the middle of the wall.

Another technical problem to be solved by the present invention is to provide a method for manufacturing a reciprocating linear cutting electric razor head, which has the advantages of simple process, and the prepared electric razor head is small in size, multi-functional, and has good shaving performance specialty.

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:

Supplied with stand including:

- fixed knife support, the fixed knife support has two support parts, front and rear, and a mounting groove between the two support parts, the middle part of the mounting groove is provided with a transmission hole,

- guide frame, the guide frame is located in the installation 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 movement hole of the transmission part,

The elastic member is provided with a middle hole, which is placed on the outside of the guide frame from top to bottom, positioned by the guide frame, and has upwardly extending elastic arms located on the front and rear sides of the guide frame,

Drive seat provided,

Supplied with moving knife assemblies including:

- a moving knife, the moving knife is a flat plate structure, at least one of the front and rear sides has a moving cutting tooth, and the middle part is provided with a relief hole,

- The moving knife bracket, which includes a downward first connecting portion, and an upward second connecting portion and a third connecting portion, the second connecting portion is arranged on the left and right sides of the moving knife bracket, and the third connecting portion part is located between the second connecting parts,

Wherein, the second connecting portion is connected and fixed to the bottom of the movable knife, and the second connecting portions on the left and right sides are located on the left and right sides of the relief hole,

providing an intermediate knife having an arched top with arched cutting teeth on the arched top, passing the intermediate knife through the relief hole and installing it on the third connecting portion,

Put the driving base from the bottom of the bracket, and the moving knife assembly from the top of the bracket, through the first connecting part and/or the driving base through the movement hole of the transmission member, and the first connecting part is plugged and connected with the driving base and fastened together and mounted on brackets,

Wherein, 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, and the bottoms of the movable knife located on the front and rear sides of the relief hole are pressed on the elastic arms. Next, the top surface of the moving knife is slightly higher than the left and right support parts on the fixed knife bracket, and the moving knife bracket is elastically held up, and the moving knife bracket has a space for pressing down and moving relative to the guide frame. The knife protrudes above the moving knife from the relief hole,

Provide an intermediate knife net, the middle knife net is provided with an anti-off limit part,

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 the first wall at the top and the second bent wall. After bending, at least one of the front and rear sides is provided with a There are fixed cutting teeth corresponding to the movable cutting teeth, and the middle part of the first wall is provided with a middle installation hole,

Wherein, the middle knife net and the fixed knife are independent, the middle knife net is placed on the middle knife from above, and then the middle installation hole is facing the middle knife net, and the fixed knife is placed on the outside of the middle knife net, and the anti-off limit The position part is attached to the bottom surface of the first wall of the fixed knife, and the two second walls of the fixed knife are wrapped on the outside of the two supporting parts of the fixed knife bracket and fixed tightly. After the fixed knife is fixed, its first wall presses On the moving knife, press the moving knife down, and press the middle knife net on the middle knife at the same time; or the middle knife net passes through the middle installation hole, and is pre-fixed on the first fixed knife through the anti-off limit part. On one wall, connect the fixed knife to the fixed knife bracket, in which the middle knife net is set on the middle knife, and the two second walls of the fixed knife are wrapped on the outside of the two supporting parts of the fixed knife bracket and fixed tightly After the fixed knife is fixed, its first wall presses on the moving knife, and presses down the moving knife, while the middle knife net is pressed on the middle knife.

According to the method for manufacturing a reciprocating linear cutting electric shaving head, when the middle knife net and the fixed knife are independent, the middle knife is movably connected up and down on the third connecting part, and the moving An elastic pressing piece is installed between the knife support and the middle knife. Preferably, the elastic pressing member adopts a shrapnel, and the movable knife assembly is firstly welded and fixed on the elastic pressing member, and then the movable knife is fixed on the second connecting part.

Compared with prior art, the present invention has following advantage:

1. The electric razor head corresponding to the present invention adds a set of intermediate knife nets and a cutting structure of the middle knife in the middle of the fixed knife. First, the middle knife net protruding above the top of the fixed knife can make the electric The top of the shaving head has a better skin-adhesive effect; second, the electric shaving head has the performance of middle cutting, which improves the shaving efficiency and avoids increasing the manufacturing difficulty of the fixed knife; third, the separate Because of its small size, the middle knife net is easy to be made thinner, which makes the shave cleaner.

2. The manufacturing method of the present invention is simple in process, and the prepared electric shaving head can effectively ensure that the fixed knife and the moving knife are tightly bonded, and the middle knife net and the middle knife also have a tight fit, and also It ensures that the middle knife net and the middle knife can float relative to the fixed knife, which improves the sharpness of cutting and the touch of the skin when shaving.

【Description of drawings】

The specific embodiment of the present invention is described in further detail below in conjunction with accompanying drawing, wherein:

Fig. 1 is an exploded view of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

Fig. 2 is a schematic structural view of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

Fig. 3 is a top view of a first embodiment of a reciprocating linear cutting electric shaver head of the present invention;

Fig. 4 is a sectional view along the A-A direction in Fig. 3;

Fig. 5 is a sectional view along the B-B direction in Fig. 3;

Fig. 6 is a partial enlarged view along E in Fig. 5;

Fig. 7 is an exploded view of a second embodiment of a reciprocating linear cutting electric shaver head of the present invention;

Fig. 8 is a schematic structural view of a second embodiment of a reciprocating linear cutting electric shaver head of the present invention;

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

Fig. 10 is a sectional view along the C-C direction in Fig. 9;

Fig. 11 is a sectional view along the D-D direction in Fig. 9;

Fig. 12 is a schematic structural view of an embodiment of a reciprocating linear cutting electric shaving head with two intermediate knife nets in the present invention;

Fig. 13 is a schematic structural view of the movable knife bracket corresponding to the embodiment of the present invention having two intermediate knife nets;

Fig. 14 is a schematic structural view of an embodiment of a fixed knife;

Fig. 15 is a schematic structural view of an embodiment of the electric shaver head corresponding to the fixed knife in Fig. 14;

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

Fig. 17 is a schematic diagram when the moving knife assembly, the middle knife and the driving seat are installed on the bracket;

Figure 18 is a schematic diagram of the installation of the structure in which the middle knife net is independent of the fixed knife;

Figure 19 is a schematic diagram of the installation of the structure in which the middle knife net is fixed on the fixed knife;

Figure 20 is a schematic diagram of the installation of the fixed knife.

【Detailed ways】

The present invention will be further described below in conjunction with accompanying drawing:

A reciprocating linear cutting electric shaving head as shown in Figures 1 to 15 includes a fixed knife bracket 1 and a fixed knife 2 fixed on the fixed knife bracket 1, and the fixed knife bracket 1 is on the left and right sides There are support parts 11 for supporting the fixed knife 2 from the left and right sides respectively, an inner cavity 10 is formed between the fixed knife 2 and the fixed knife support 1, and an inner cavity 10 is formed between the fixed knife 2 and the fixed knife support 1. There is a hair feeding groove 25 for the hair to enter the inner cavity 10. The inner cavity 10 is provided with a moving knife 3 that cooperates with the fixed knife 2 and can move back and forth for cutting. The middle part of the top wall of the fixed knife 2 is A middle installation hole 21 is provided, and the middle knife net 4 passing through the middle installation hole 21 and protruding above the top surface of the fixed knife 2 is provided in the inner cavity 10. The knife net 4 cooperates and can reciprocate back and forth to cut the middle knife 5. The electric shaver head also includes a transmission part 6 that connects the moving knife 3 and the middle knife 5 with the power device of the electric shaver. The present invention adds a group of intermediate knife nets and a cutting structure of the middle knife in the middle of the fixed knife 2. First, the middle knife net protruding above the top of the fixed knife 2 can make the top of the electric shaver head more Good skin-adhesive effect; second, the electric razor head has the performance of middle cutting, which improves the shaving efficiency and avoids increasing the manufacturing difficulty of the fixed knife 2; third, the separate middle knife net 4 due to its volume Small and easy to make thinner for a cleaner shave.

In order to facilitate the installation and connection with the external handle, as shown in FIGS. 1 to 5 , a mounting seat 100 is provided on the outside of the structure formed by the fixed knife bracket 1 and the fixed knife 2 for mounting on the handle.

In the middle of the movable knife 3, there is a relief hole 31 for opening the middle knife net 4 when moving back and forth linearly, so as to prevent the moving knife 3 from colliding with the middle knife net 4 when it moves back and forth.

In order to make the movable knife 3 stick to the bottom of the fixed knife 2 better and improve the sharpness of cutting, as shown in Figures 1, 7 and 11, there is a movable knife between the movable knife 3 and the fixed knife bracket 1 that can hold the movable knife. 3 Compress the elastic member 7 on the fixed knife 2.

As a preferred embodiment of the transmission part, as shown in Figures 1, 5, 7 and 10, the transmission part 6 includes a moving knife bracket 61 fixedly connected to the moving knife 3 and the middle knife 5, and the moving knife bracket 61 is connected to There is a drive mount 62 for connection with the power unit of the electric shaver. In order to facilitate the directional movement of the movable knife bracket 61 , a guide frame 8 is provided in the inner cavity 10 , and the guide frame 8 includes a guide groove 81 for the movable knife bracket 61 to slide and guide forward and backward.

The movable knife bracket 61 includes a first connecting portion 611 facing downwards, a second connecting portion 612 and a third connecting portion 613 facing upwards, the first connecting portion 611 is used to connect with the driving base 62 The second connecting part 612 is used for connecting with the movable knife 3, and the third connecting part 613 is used for connecting with the middle knife 5, the structure is simple, and it is convenient to drive the moving knife 3 and the middle knife 5 to reciprocate back and forth at the same time.

As a preferred embodiment of the middle knife 5 , as shown in FIGS. 1 , 4 , 5 , 7 , 10 , and 11 , the middle knife 5 includes 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 between the first leg and the second leg, the arched portion is located above the knife holder and has arched cutting teeth on it, The knife rest is used to connect and drive with the movable knife bracket 61, and at the same time, the blade is supported by the connection between the knife rest and the first leg and the second leg so that the shape of the arch is fixed and the cutting teeth in the middle are formed. The volume is small for convenience. Place it in the middle of the knife.

As a preferred connection mode between the third connecting portion 613 and the middle knife 5, the third connecting portion 613 is a pin, and the knife holder 52 is provided with an insertion hole 53 that is inserted into the third connecting portion 613, and the structure is simple. Easy to assemble.

As an embodiment of the middle knife net 4 , the middle knife net 4 is fixedly arranged relative to the fixed knife 2 . As shown in Figures 1, 4, and 5, the middle knife net 4 is provided with an anti-off limiter 43 that can be stuck on the bottom of the fixed knife 2, the middle knife 5 is fixed on the transmission part 6, and the middle The knife 5 supports the middle knife net 4 and makes the anti-off limiting part 43 abut against the bottom of the fixed knife 2, or the anti-off limiting part 43 is directly fixed on the bottom of the fixed knife 2 by bonding, welding or welding. The anti-off limiting part 43 can be a plastic part fixed on the lower part of the middle knife net 4, or can be a metal integrally formed with the middle knife net 4, and the structure is simple.

As another embodiment of the middle knife net 4, the middle knife net 4 is floating relative to the fixed knife 2, so as to be able to float to a certain extent according to the skin surface and the way of applying force, so as to improve the skin sticking effect and comfort. As shown in Figures 7, 10, and 11, the middle knife net 4 is movably connected up and down on the guide frame 8, and the middle knife 5 is movably connected up and down on the transmission part 6, and the middle knife 5 and the transmission part 6 are provided with There is an elastic pressing piece 9 for elastically pressing the middle knife 5 upward and pushing up the middle knife net 4. Preferably, the elastic pressing piece 9 is a spring and is sleeved on the third connecting portion 613 On the other hand, the structure is simple and the assembly is convenient.

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 described knife net frame 41 is provided with a spacer for inserting into a limit position. The limit bar 42 in the position groove 82 is shown in the embodiment in Fig. 7 and Fig. 10, and the limit bar is also used as an anti-off limit part to prevent the intermediate knife net from slipping out of the fixed knife.

In one of the preferred embodiments, the fixed knife support is a rigid support, and the cross-section of the fixed knife support is arcuate, and the fixed knife is a flexible metal sheet, using the flexibility of the flexible metal sheet itself to fix The edges on the left and right sides of the knife bracket are supported, and the fixed knife is bent and tightened along the bow-shaped outer side of the fixed knife bracket under the action of a certain external force, and the side of the fixed knife is welded, riveted or pasted. It is fixed on the side or bottom surface of the fixed knife bracket. The initial shape of the fixed knife in the process here can be a flat plate structure, or it can be pre-bent on the left and right sides. The left and right ends of the fixed knife are fixed with the fixed knife bracket to form a structure similar to a bow and a bowstring, so that the fixed knife can obtain a very flat cutting surface in contact with the moving knife without additional precision machining, and achieve a small size Compact; in addition, the thickness of the fixed knife can be made thinner than other process structures. Of course, for the reciprocating linear cutting electric shaver head, the structure of the fixed knife and the fixed knife support and the combination of the two can also adopt other forms.

The invention has simple structure, small volume and better shaving performance.

In the present invention, there may be one intermediate knife net 4, as in the embodiments shown in Figures 1 to 11, and Figures 14 and 15, or there may be two or more intermediate knife nets 4, as shown in Figure 12 For an embodiment with two middle knife nets 4, there are two sets of corresponding middle knife 5, and the transmission part 6 connects two sets of middle knife 5 respectively by setting two sets of third connecting parts 613 on the moving knife bracket 61. Thereby realize driving, as shown in Figure 13, simple structure, shaving range is big.

Regarding the preferred embodiment of the fixed knife, the fixed knife of a reciprocating linear cutting electric shaver head as shown in Figure 1 and Figure 14 includes a first wall 22 and a second wall located at the front and rear sides of the first wall 22. Wall 23, the second wall 23 is bent downward relative to the first wall 22 and forms a V-shaped or U-shaped installation groove 24; Grooves 25, fixed cutting teeth 26 are formed between two adjacent wool-feeding grooves 25, and the middle installation hole 21 is arranged on the middle part of the first wall 22, and its length accounts for 1/2 of the length of the entire first wall 22 to three quarters.

As shown in Figure 1, Figure 5 and Figure 6, the first wall 22 is provided with a wrapping 27 around the middle mounting hole 21, so that the first wall 22 can be made very thin and the middle mounting hole 21 The edge has a better structural strength to prevent tearing from the edge of the middle mounting hole 21 .

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

The embodiment shown in Figure 14, the left and right sides of described first wall 22 are provided with the third wall 29 that bends down, on one end of first wall 22, described third wall 29 is from the first wall The front side of 22 surrounds the rear side, and the second wall 23 on the front side and the second wall 23 on the rear side are spaced apart from each other in the bent state, and the first wall 22, the second wall 23 and the third wall 29 A notch 28 is formed between them, which is used to load the fixed knife bracket 1. The electric shaving head formed by the fixed knife, as shown in Figure 15, the fixed knife can be wrapped on the upper end of the fixed knife bracket 1 to form a skin drum structure , so that the top surface of the entire cutter head and the adjacent surroundings are smoothly transitioned, and the skin is good.

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 and the wall rear portion 292 are connected to the wall middle portion 293 round transitions between.

A method of manufacturing a reciprocating linear cutting electric shaver head as shown in Figures 16 to 18, the method includes:

Supplied with stand including:

- The fixed knife bracket 1, the fixed knife bracket 1 has two supporting parts 11 at the front and back, and a mounting groove 12 between the two supporting parts 11, the middle part of the mounting groove 12 is provided with a transmission member movement hole 13,

- The guide frame 8, the guide frame 8 is located in the installation 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 part movement hole 13,

The elastic member 7 is provided with a middle hole, which is placed on the outside of the guide frame 8 from top to bottom, and is positioned front, rear, left, and right by the guide frame 8, and has elastic arms 71 extending upwards located on the front and rear sides of the guide frame 8 ,

A driving seat 62 is provided for connection with the power unit of the electric shaver,

Supplied with moving knife assemblies including:

-moving knife 3, said moving knife 3 can be put into the mounting groove 12 as a whole, has a moving cutting tooth 32 on at least one side in the front and back sides, and has a gap hole 31 in the middle,

- The moving knife bracket 61, which includes a downward first connecting portion 611, and an upwardly facing second connecting portion 612 and a third connecting portion 613, the second connecting portion 612 is arranged on the left and right sides of the moving knife bracket 61 , the third connecting portion 613 is located between the second connecting portions 612,

Wherein, the second connecting portion 612 is connected and fixed to the bottom of the movable knife 3, and the second connecting portions 612 on the left and right sides are located on the left and right sides of the relief hole 31,

The middle knife 5 is provided, the middle knife 5 has an arched top, and has an arched cutting tooth 54 on the arched top, the middle knife 5 passes through the relief hole 31 and is installed on the third connecting portion 613,

The driving seat 62 is passed from the bottom of the bracket, and the moving knife assembly is passed through the transmission part movement hole 13 through the first connecting part 611 and/or the driving seat 62 from the top of the bracket, and the first connecting part 611 and the driving The seat 62 is plugged in and fixed together, and installed on the support,

Wherein, 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. Above, 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 held up, and the movable knife bracket 61 is relatively guided The frame 8 has a space for pressing down and moving, and the middle knife 5 protrudes above the moving knife 3 from the relief hole 31,

An intermediate knife net 4 is provided, and the middle knife net 4 is provided with an anti-off limiting part 43,

A fixed knife 2 is provided, which is made of a thin metal sheet, and its material thickness is preferably less than 0.15mm. After bending, at least one of the front and rear sides is provided with fixed cutting teeth corresponding to the movable cutting teeth 32, and the middle part of the first wall is provided with a middle installation hole 21,

Wherein, the middle knife net 4 and the fixed knife 2 are independent, the middle knife net 4 is set on the middle knife 5 from above, and then the middle installation hole 21 faces the middle knife net 4 and the fixed knife 2 is set on the middle knife net 4 outside, and make the anti-off limit part 43 lean against the bottom surface of the first wall of the fixed knife 2, wrap the two second walls of the fixed knife on the outside of the two support parts 11 of the fixed knife bracket 1, and Fixed, after the fixed knife 2 is fixed, its first wall is pressed on the movable knife 3, and the movable knife 3 is pressed down, and the middle knife net 4 is pressed on the middle knife 5 at the same time.

In this method, the connection method between the middle knife 5 and the moving knife bracket 61 is to connect the middle knife 5 up and down on the third connecting part 613, and an elastic top pressure is installed between the moving knife bracket 61 and the middle knife 5. 9, the elastic pressing piece 9 can be a spring, when the middle knife 5 is installed, the elastic pressing piece 9 is set on the third connecting part 613, and the elastic pressing piece 9 is limited to the movable knife by the middle knife 5 on the bracket 61. Alternatively, the elastic pressing member 9 adopts a shrapnel, which can reduce the installation space required by the elastic pressing member 9 while ensuring the elastic force, thereby effectively reducing the volume of the electric shaver head. First weld and fix the elastic pressing member 9 thereon, and then fix the movable knife 3 on the second connecting portion 612 .

In the above process, the method of fixing the fixed knife 2 on the fixed knife bracket 1 is preferred. As shown in Figure 20, the fixed knife is placed on the outside of the fixed knife bracket 1 to obtain a pre-installed product, and an electric shaver head is provided. The top surface of the fixed knife and the middle knife net 4 exposed above the top surface of the fixed knife match the assembly platform, turn the pre-installed product over, and make the top surface of the fixed knife and the middle knife net exposed above the top surface of the fixed knife 4 Paste it on the assembly table facing down, use the assembly table as the bottom support, press down the bracket and make the tops of the two support parts 11 on the fixed knife bracket 1 press on the fixed knife, and simultaneously place the moving knife 3 and the middle knife 5 Press down from the floating state, and then bend the second wall of the fixed knife located outside the two support parts 11 around the top of the support part 11 twice to push on the support part 11, and the thrust F during the pushing process will generate a The component force F1 of the second wall pressed firmly on the support part 11, and a component force F2 that pushes the second wall and transmits it to the first wall to make the first wall stretch outward, so that the first wall is tensioned Between the two supporting parts 11, after performing welding and bonding and fixing, the push is released, and the fixed finished product is removed from the assembly table.

The manufacturing method of the present invention is simple in process, and the obtained electric razor head can effectively ensure the tight fit between the fixed knife and the moving knife, and at the same time, the middle knife net 4 and the middle knife 5 also have a tight fit, and also It is ensured that the middle knife net 4 and the middle knife 5 can float relative to the fixed knife, so as to improve the cutting sharpness and the touch of the skin when shaving.

Another method for manufacturing a reciprocating linear cutting electric shaving head as shown in FIG. 19 is different from the method of the above-mentioned first embodiment in that: the middle knife net 4 passes through the middle installation hole 21, It is pre-fixed on the first wall of the fixed knife 2 through the anti-off limit part 43, and then the fixed knife is connected with the fixed knife support 1, wherein the middle knife net 4 is set on the middle knife 5, and the two fixed knife The second wall wraps on the outside of the two supporting parts 11 of the fixed knife bracket 1 and fixes it tightly. After the fixed knife 2 is fixed, its first wall presses on the moving knife 3 and presses down the moving knife 3. At the same time, the middle knife The net 4 is pressed on the middle knife 5, thereby making the electric shaver head in which the middle knife net is fixed relative to the fixed knife.

Claims

An electric shaver head for reciprocating linear cutting, characterized in that it comprises a fixed knife bracket (1) and a fixed knife (2) fixed on the fixed knife bracket (1), and the fixed knife bracket (1) is The left and right sides are respectively provided with support parts (11) for supporting the fixed knife (2) from the left and right sides, and an inner cavity (10) is formed between the fixed knife (2) and the fixed knife bracket (1), Between the fixed knife (2) and the fixed knife support (1), there is a hair feed groove (25) for the hair to enter the inner cavity (10), and the inner cavity (10) is provided with the fixed knife. (2) A moving knife (3) that cooperates and can reciprocate back and forth for cutting. The middle part of the top wall of the fixed knife (2) is provided with an intermediate mounting hole (21), and the inner cavity (10) is provided with a through hole. Pass through the middle installation hole (21) and protrude from the middle knife net (4) above the top surface of the fixed knife (2). The middle knife (5) is reciprocated for cutting, and the electric shaver head also includes a transmission part (6) connecting the moving knife (3) and the middle knife (5) with the power device of the electric shaver.
A reciprocating linear cutting electric razor head according to claim 1, characterized in that: the transmission part (6) includes a movable knife bracket fixedly connected with the movable knife (3) and the middle knife (5) (61), the moving knife bracket (61) is connected with a driving base (62) for connecting with the power unit of the electric shaver.
A reciprocating linear cutting electric razor head according to claim 2, characterized in that: the moving knife bracket (61) includes a first connecting portion (611) facing downwards, and a second connecting portion (611) facing upwards. A connecting part (612) and a third connecting part (613), the first connecting part (611) is used for connecting with the driving seat (62), and the second connecting part (612) is used for connecting with the movable knife (3) connection, the third connection part (613) is used to connect with the middle knife (5).
A reciprocating linear cutting electric razor head according to claim 3, characterized in that: the middle knife (5) includes a blade (51) and a knife holder (52), and the blade (51) is fixed on the knife holder (52).
A reciprocating linear cutting electric razor head according to claim 4, characterized in that: the third connecting part (613) is a pin, and the knife holder (52) is provided with a third connecting part. The insertion hole (53) where the part (613) is plugged.
A reciprocating linear cutting electric razor head according to claim 1, characterized in that: between the movable knife (3) and the fixed knife bracket (1), there is a device capable of pressing the movable knife (3) Be tight on the elastic part (7) on the fixed knife (2).
A reciprocating linear cutting electric shaving head according to claim 1, characterized in that: the middle knife net (4) is fixedly arranged relative to the fixed knife (2).
A reciprocating linear cutting electric razor head according to claim 7, characterized in that: the middle knife net (4) is provided with an anti-off limit that can be stuck on the bottom of the fixed knife (2) part (43), the middle knife (5) is fixed on the transmission part (6), the middle knife (5) supports the middle knife net (4) and makes the anti-off limit part (43) lean against On the bottom of the fixed knife (2), or the anti-off limiting part (43) is directly fixed on the bottom of the fixed knife (2).
A reciprocating linear cutting electric shaving head according to claim 1, characterized in that: the middle knife net (4) is floating relative to the fixed knife (2).
A reciprocating linear cutting electric razor head according to claim 9, characterized in that: the inner cavity (10) is provided with a guide frame (8), and the middle knife net (4) is up and down It is movably connected on the guide frame (8), and the middle knife (5) is movably connected on the transmission part (6) up and down, and a device for connecting the middle knife (5) is arranged between the middle knife (5) and the transmission part (6). ) elastically presses upwards and the elastic pressing piece (9) that lifts up the middle knife net (4).
A fixed knife of a reciprocating linear cutting electric razor head, characterized in that it includes a first wall (22) and second walls (23) located on the front and back sides of the first wall (22), the second The wall (23) is bent downward relative to the first wall (22) and forms a V-shaped or U-shaped installation groove (24), and a side wall is formed between the first wall (22) and the second wall (23). square feeding grooves (25), fixed cutting teeth (26) are formed between two adjacent hair feeding grooves (25), and the middle part of the first wall (22) is provided with an intermediate mounting hole (21), used The intermediate member below the first wall (22) protrudes above the first wall (22) from the intermediate installation hole (21).
The fixed knife of a reciprocating linear cutting electric razor head according to claim 11, characterized in that: the first wall (22) is provided with hemming ( 27).
The fixed knife of a reciprocating linear cutting electric razor head according to claim 12, characterized in that: the wrapping edge (27) is folded back and attached to the inner wall of the first wall (22).
According to claim 11, the fixed knife of a reciprocating linear cutting electric razor head is characterized in that: the left and right sides of the first wall (22) are provided with a third wall ( 29), on one end of the first wall (22), the third wall (29) surrounds from the front side to the back side of the first wall (22), and the second wall (23) on the front side in the bent state ) and the second wall (23) on the rear side are spaced apart, and form a notch (28) between the first wall (22), the second wall (23) and the third wall (29).
The fixed knife of a reciprocating linear cutting electric razor head according to claim 14, characterized in that: the third wall (29) includes a front wall (291) and a rear wall (292), And the wall middle part (293) connecting the wall front part (291) and the wall rear part (292), the round corner transition between the wall front part (291) and the wall rear part (292) and the wall middle part (293).
A method of manufacturing a reciprocating linear cutting electric shaver head, the method comprising:

Supplied with stand including:

-fixed knife bracket (1), the fixed knife bracket (1) has two support parts (11) before and after, and the installation groove (12) between the two support parts (11), the installation groove (12 ) is provided with a transmission member movement hole (13) in the middle,

- The guide frame (8), the guide frame (8) is located in the installation groove (12), the guide frame (8) is fixed on the fixed knife bracket (1) by injection molding, and the guide frame (8) is located in the transmission part movement Hole (13) left and right sides,

Provide the elastic piece (7) with a middle hole, put it on the outside of the guide frame (8) from top to bottom, position it through the guide frame (8), and have upward holes located on the front and rear sides of the guide frame (8). stretched spring arm (71),

Drive seat (62) is provided,

Supplied with moving knife assemblies including:

- The movable knife (3), which can be put into the installation groove (12) as a whole, has a movable cutting tooth (32) on at least one of the front and rear sides, and has an escape hole in the middle ( 31),

- The movable knife bracket (61), which comprises a first connecting portion (611) facing downwards, and a second connecting portion (612) and a third connecting portion (613) facing upwards, the second connecting portion (612) Located on the left and right sides of the movable knife bracket (61), the third connecting portion (613) is located between the second connecting portions (612),

Wherein, the second connecting part (612) is connected and fixed to the bottom of the movable knife (3), and the second connecting parts (612) on the left and right sides are located on the left and right sides of the relief hole (31),

Provide an intermediate knife (5) with an arched top with arched cutting teeth (54) on the arched top, pass the intermediate knife (5) through the relief hole (31) And installed on the third connecting part (613),

The driving seat (62) is passed from the bottom of the support, and the moving knife assembly is passed through the transmission part movement hole (13) through the first connecting part (611) and/or the driving seat (62) from above the support, so that The first connecting part (611) and the driving seat (62) are plugged and fixed together, and installed on the bracket,

Wherein, 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, and the movable knife (3) is located in the relief hole (31) The bottoms of the front and rear sides are pressed on the elastic arms (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 moving knife support (61) is elastically held up, the moving knife support (61) has a space for pressing down and moving relative to the guide frame (8), and the middle knife (5) protrudes from the relief hole (31) in the above the moving knife (3),

An intermediate knife net (4) is provided, and the intermediate knife net (4) is provided with an anti-off limiting part (43),

A fixed knife (2) is provided, which is made of sheet metal. The front and rear side walls of the metal sheet are pre-bent to form a first wall at the top and a bent second wall. After bending, at least One side is provided with fixed cutting teeth corresponding to the movable cutting teeth (32), and the middle part of the first wall is provided with a middle mounting hole (21),

Wherein, the middle knife net (4) and the fixed knife (2) are independent, the middle knife net (4) is set on the middle knife (5) from above, and then the middle installation hole (21) faces the middle knife net (4) Put the fixed knife (2) on the outer side of the middle knife net (4), and make the anti-off stopper (43) stick to the bottom surface of the first wall of the fixed knife (2), and put the two sides of the fixed knife The first wall of the second wall is tightly attached to 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 moving knife (3), and the The knife (3) is pressed down, and the middle knife net (4) is pressed on the middle knife (5) at the same time; or, the middle knife net (4) passes through the middle mounting hole (21), and the The part (43) is pre-fixed on the first wall of the fixed knife (2), and then the fixed knife (2) is connected with the fixed knife bracket (1), wherein the middle knife net (4) is set on the middle knife (5) , and wrap the two second walls of the fixed knife (2) on the outside of the two support parts (11) of the fixed knife bracket (1) and fix them tightly. After the fixed knife (2) is fixed, its first wall is pressed against the moving Put the knife (3) on, and press the moving knife (3) downward, while the middle knife net (4) is pressed on the middle knife (5).
According to a method for manufacturing a reciprocating linear cutting electric razor head according to claim 16, when installing the fixed knife, the fixed knife is placed on the outside of the fixed knife bracket (1) to obtain a pre-installed product, and a The assembly platform that matches 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 turns the pre-assembled product over, and makes the top surface of the fixed knife and the top surface of the fixed knife exposed on the fixed knife. The middle knife net (4) above the top surface of the knife is pasted downward on the assembly platform, and the assembly platform is used as the bottom support to press down the bracket and press the tops of the two support parts (11) on the fixed knife bracket (1). On the fixed knife, press the movable knife (3) and the middle knife (5) from the floating state at the same time, and then wrap the second wall of the fixed knife located outside the two support parts (11) around the support part (11) The top secondary bending pushes against the supporting part (11), and the thrust F during the pushing process produces a component force F1 that presses the second wall firmly on the supporting part (11), and a force that pushes the second wall and It is transmitted to the first wall of the fixed knife to cause the first wall to generate a component force F2 that stretches outward, so that the first wall is stretched between the two support parts (11), and then welded and bonded to fix it and then loosen Push to remove the fixed finished product from the assembly table.
According to the method for manufacturing a reciprocating linear cutting electric razor head according to claim 16, when the middle knife net (4) and the fixed knife (2) are independent, the middle knife (5) is up and down It is movably connected on the third connecting part (613), and an elastic pressing piece (9) is installed between the movable knife bracket (61) and the middle knife (5).
According to a method for manufacturing a reciprocating linear cutting electric razor head according to claim 18, the elastic top pressing part (9) adopts a shrapnel, and the moving knife assembly is welded and fixed on the elastic top first. Press piece (9), fix movable knife (3) on the second connection part (612) again.