Tool head assembly based on stationary tools formed by stamping and grinding.

Abstract

This invention relates to a cutter head assembly based on a fixed cutter formed by stamping and grinding. The assembly includes a fixed cutter, a fixed cutter holder, a moving cutter, a moving cutter holder, an elastic pressing component, a flipping connecting seat, and a flipping reset component. The fixed cutter is integrally formed using stamping and grinding processes. On one hand, the stamped and ground fixed cutter is easy to process, and the connection between the tooth grooves and the comb grooves reduces the amount of hair squeezed out from the tooth grooves, improving cutting efficiency and effect. Simultaneously, with the combing ball head setting, it not only increases contact comfort and enhances the user experience but also reduces tooth tip damage and extends service life. On the other hand, the elastic pressing and sliding guide connection of the pressing component avoids movement gaps between the moving and fixed cutters during reciprocating motion, improving the cutting efficiency and effect between the moving and fixed cutters, thereby enhancing the user experience. Furthermore, the cutter head can rotate around a pivot, allowing it to trim hair at the desired angle, making it highly practical.

Description

Technical Field

[0001] This invention belongs to the field of hair care products, and specifically relates to a blade assembly based on a fixed blade formed by stamping and grinding. Background Technology

[0002] Currently, the blades used for trimming hair mainly consist of a fixed blade assembly and a moving blade assembly. The fixed blade assembly includes a fixed blade and a fixed blade holder, while the moving blade assembly includes a moving blade that fits against the fixed blade and a moving blade holder. The moving blade and the fixed blade each form comb teeth and moving blade teeth from opposite sides along their length, respectively. Trimming is achieved through the shearing action of the comb teeth and moving blade teeth. The blade holder is mounted on the fixed blade holder and reciprocates along the length of the fixed blade. In this way, trimming hair can be performed simply by connecting the power output to the moving blade holder.

[0003] However, the aforementioned cutter head assembly has the following technical problems in actual use:

[0004] 1. Once a gap is created between the moving and stationary blades during reciprocating motion, hairs will enter the gap, affecting not only the cutting effect of the moving and stationary blades, but also causing pain to the user by pulling on the hairs, resulting in a very poor user experience.

[0005] 2. The angle formed by the blade is relatively fixed and cannot be adjusted by rotation, which makes it impossible to perform the required wide-angle hair trimming.

[0006] 3. Since the fixed-blade self-combing teeth come into contact with the skin, the shape of the comb teeth is very important. The teeth of a conventional comb gradually narrow and form a chamfer. While the chamfer can prevent skin damage, the teeth are easily deformed after collision and are not easily noticed. At the same time, the groove formed by two adjacent teeth gradually decreases in size from the outside to the inside. During the cutting process of the moving blade, the hairs located in the groove will be squeezed outward and cut. Therefore, most of the hairs will be squeezed out of the groove, resulting in poor cutting efficiency and effect.

[0007] 4. The single comb teeth on the fixed cutter are basically formed by cutting, which not only has high processing costs, but also easily causes damage to the comb teeth or chipping during the processing. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved tool head assembly based on a fixed tool formed by stamping and grinding.

[0009] To solve the above technical problems, the present invention adopts the following technical solution:

[0010] A cutter head assembly based on a fixed cutter formed by stamping and grinding includes a fixed cutter, a fixed cutter holder, a moving cutter, and a moving cutter holder. The fixed cutter and the moving cutter respectively form comb teeth and trimming teeth on their respective sides along the length direction. The moving cutter holder, with its power docking portion extending through the fixed cutter holder, is particularly...

[0011] The fixed blade is integrally formed by stamping and grinding, and includes a fixed blade body with comb teeth formed on both sides along the length direction. The comb teeth are formed by stamping, and an inwardly recessed tooth groove is formed between two adjacent comb teeth. Grinding makes the tip of each comb tooth form a comb ball head, and a comb groove is formed between each two adjacent comb balls. In the orthographic projection of the fixed blade in the thickness direction, the tooth groove is connected to the comb groove. The comb groove includes a first groove area that moves inward from the open end of the tooth groove and narrows its opening, and a second groove area that opens outward from the outer end of the first groove area.

[0012] The cutter head assembly also includes an elastic pressing member that slides against the moving cutter to maintain the moving cutter's relative fit to the fixed cutter's movement trend, a flipping connecting seat, and a flipping reset member. The fixed cutter seat is rotatably mounted on the flipping connecting seat from both ends via a pivot. The flipping reset members are torsion springs respectively sleeved on the pivot, with the two torsion arms of each torsion spring abutting against the flipping connecting seat and the fixed cutter respectively.

[0013] Preferably, the minimum width w1 of the contraction opening formed by the first groove area and the maximum width w2 of the open end of the tooth groove are provided, wherein w1 is 0.5 to 0.9 times w2.

[0014] According to a specific embodiment and preferred aspect of the invention, the tooth grooves are U-shaped and symmetrically arranged along the central axis, and two adjacent comb heads are symmetrically distributed about the central axis of the U-shape. This facilitates stamping and forming.

[0015] Preferably, the minimum width of the tooth groove is w3, where w3 ≥ w1. This not only achieves a good combing effect but also significantly improves the shearing efficiency.

[0016] Furthermore, w3-w1≤(w2-w1) / 2. That is to say, under this width constraint, the combing and shearing effects are optimal.

[0017] According to another specific embodiment and preferred aspect of the invention, the maximum width of the outwardly open end of the second groove area is greater than the maximum width of the open end of the tooth groove. This allows for smoother combing of the hair towards the first groove area.

[0018] According to another specific embodiment and preferred aspect of the invention, each combing head protrudes outward from the circumferential surface of its corresponding tooth tip. This not only prevents accidental damage and deformation caused by tooth tip collisions, but also ensures that there is no probability of skin injury at any contact angle.

[0019] Preferably, each combing ball head is aligned and distributed along the length of the fixed blade body. This facilitates forming processes such as stamping and grinding.

[0020] Preferably, the center line of each comb tooth is aligned with the center line of the comb ball head.

[0021] Preferably, the flip-up connector includes a support arm with an open opening, pivotally mounted on the support arm, and two torsion arms of each torsion spring abut against the support arm and the fixed blade, respectively. This allows for trimming of the hair at the desired flip angle and enables immediate resetting.

[0022] According to a specific embodiment and preferred aspect of the present invention, grooves are formed at both ends of the fixed blade, and the two torsion arms of each torsion spring abut against the inner walls of the support arm and the fixed blade, respectively; or, the two torsion arms of each torsion spring abut against the grooves of the support arm and the fixed blade, respectively. This facilitates the installation of the torsion springs and also makes it easier to select and adjust the flipping angle.

[0023] According to another specific embodiment and preferred aspect of the present invention, the elastic pressing member includes a pressing member body abutting within a fixed blade holder, and pressing die strips located on both sides of the pressing member body and capable of sliding relative to and abutting against a moving blade. The pressing member body has a relief groove formed to avoid movement of the moving blade holder. The pressing die strips extend along the length of the moving blade, and the pressing die strips maintain the elastic fit between the moving blade and the fixed blade under the internal support deformation of the pressing member body. Through the elastic pressing and sliding guide docking of the pressing member, gaps between the moving blade and the fixed blade during reciprocating motion are avoided, thereby improving the shearing efficiency and effect between the moving blade and the fixed blade, and enhancing the user experience.

[0024] Preferably, the fixed blade holder includes a first base extending along the length of the fixed blade and a second base having a through groove, wherein the first base is fixed to the fixed blade, the second base is abutted against the first base at its end, the clearance groove and the through groove are connected through, and the pressing part body abuts against the second base. That is to say, the reference for the blade assembly in this application is the fixed blade, which is more conducive to the close-fitting shearing motion of the fixed blade and the moving blade.

[0025] According to a specific embodiment and preferred aspect of the present invention, the first base includes a frame plate fixed to the middle of the fixed blade and end plates located at both ends of the frame plate. The moving blade is attached to the frame plate and reciprocates between the two end plates. The second base has parallel circumferentially closed cavities that are respectively connected to the end plates at both ends. The pressing component body is located within the cavity, and the trimming teeth protrude from opposite sides of the cavity and slidably attach to the comb teeth. This effectively conceals and assembles the components, reducing the amount of hair falling into the cavity and causing movement interference.

[0026] Preferably, the comb teeth and trimming teeth form a relatively close moving plane, and the frame plate is flush with the moving plane. In this way, the movement of the moving blade relative to the fixed blade is more closely matched.

[0027] Preferably, the surrounding cavity includes a strip-shaped cavity extending along the length of the fixed blade and having a through groove on its bottom surface, a first limiting cavity and a second limiting cavity located at both ends of the strip-shaped cavity and whose bottom surfaces gradually bend inward, wherein the bent portion forms a first crease and a second crease, and the pressing part body is attached to the bottom surface of the strip-shaped cavity and abuts against the first crease and the second crease from both ends respectively. This facilitates the relative contact between the pressing part body and the fixed blade seat.

[0028] Furthermore, the pressing body includes a panel and two side plates located on both sides of the panel and gradually opening outwards, wherein a relief groove is provided on the panel and / or the side plates. When the pressing body abuts against the strip cavity from the panel, the side plates open relative to each other and drive the pressing die strip to press against the moving knife.

[0029] According to another specific embodiment and preferred aspect of the invention, the pressing die strip is bent outward or inward from the edge of the side plate away from the panel. This results in a pressing die strip with strong resistance to deformation, thereby achieving better pressing and guiding effects.

[0030] Preferably, the pressing die strip is rounded and bent outward from the edge of the side plate away from the panel; and / or, the length of the pressing die strip is equal to the length of the moving blade. In this way, not only is the contact area between the pressing die strip and the moving blade reduced during reciprocating motion, but uniform pressing is also maintained, significantly reducing the probability of movement gaps between the moving blade and the stationary blade.

[0031] Preferably, after the fixed tool holder is installed, the outer contours of the clearance groove and the through groove are aligned.

[0032] Furthermore, the moving blade holder includes a base body extending along the length of the moving blade, and a power docking portion disposed in the middle of the base body and connected to the power output component. The power docking portion extends through a clearance groove and is slidably disposed within the clearance groove. This facilitates the fitting and assembly of the moving blade and the implementation of motion shearing.

[0033] Preferably, the cutter head assembly further includes end heads respectively sleeved on the ends of the fixed blade, wherein grooves are formed at both ends of the fixed blade, and the end heads cover the grooves and abut against the torsion arm. The protection of the end heads further prevents the fixed blade from causing skin abrasions to the user, while the torsion arm provides installation and limiting, also enhancing the overall appearance and aesthetics.

[0034] Finally, in this example, the flip-top connector of the blade assembly is inserted into the device housing, and the power output transmission component of the device passes through the flip-top connector and connects to the power docking part.

[0035] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0036] On the one hand, the fixed blade formed by stamping and grinding is not only easy to process, but also has a connection between the tooth groove and the comb groove, reducing the amount of hair squeezed out from the tooth groove and improving the cutting efficiency and effect. At the same time, with the comb ball head setting, it not only increases contact comfort and enhances the user experience, but also reduces the damage rate of the tooth tips and extends the service life. On the other hand, through the elastic pressing and sliding guide docking of the pressing parts, the movement gap between the moving blade and the fixed blade is avoided during the reciprocating motion, thereby improving the cutting efficiency and effect between the moving blade and the fixed blade, thus enhancing the user experience. At the same time, the blade head can rotate around the pivot, so that it can trim hair at the required angle, which is highly practical. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the cutter head assembly of the present invention;

[0038] Figure 2 for Figure 1 A partial structural diagram;

[0039] Figure 3 for Figure 2 A structural decomposition diagram (Perspective 1);

[0040] Figure 4 for Figure 2 A structural decomposition diagram (perspective two);

[0041] Figure 5 for Figure 2 A partial structural diagram;

[0042] Figure 6 for Figure 5 Front view diagram;

[0043] Figure 7 for Figure 2 Schematic diagram of the center-fixed blade structure;

[0044] Figure 8 for Figure 7 Front view diagram;

[0045] Figure 9 for Figure 8 A left-view diagram;

[0046] Figure 10 for Figure 8 A diagram showing the view from below;

[0047] Wherein: 1. Fixed blade; 10. Comb teeth; 10a. Groove; 1a. Fixed blade body; 10c. Comb tooth body; c. Tooth groove; 11. End module; 12. Comb ball head; s. Comb groove; s1. First groove area; s2. Second groove area; 2. Fixed blade seat; 21. First seat body; 210. Frame plate; 211. End plate; 22. Second seat body; 2a. Through groove; q. Surrounding cavity; q1. Strip cavity; q2. First limiting cavity; q3. Second limiting cavity; h1. First crease; h2. Second crease;

[0048] 3. Use a knife; 30. Trim the teeth;

[0049] 4. Moving tool holder; 40. Base body; 41. Power docking part;

[0050] 5. Elastic pressing component; 50. Pressing component body; 500. Clearance groove; 50a. Panel; 50b. Side plate; 51. Pressing mold strip;

[0051] 6. Flip-over connector; 60. Frame arm;

[0052] 7. Flip-and-reset component;

[0053] 8. End; z. Pivot;

[0054] 9. Shell. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0060] like Figures 1 to 6 As shown, the cutter head assembly based on a fixed cutter formed by stamping and grinding in this embodiment includes a fixed cutter 1, a fixed cutter holder 2, a moving cutter 3, a moving cutter holder 4, an elastic pressing member 5, a flip connecting seat 6, a flip reset member 7, an end head 8, and a housing 9.

[0061] Specifically, the fixed blade 1 and the moving blade 3 form comb teeth 10 and trimming teeth 30 from both sides of the length direction, respectively. In other words, the comb teeth 10 and the trimming teeth 30 perform hair trimming through relative shearing motion.

[0062] The elastic pressing member 5 is disposed between the fixed blade holder 2 and the moving blade 3, and the elastic pressing member 5 includes a pressing member body 50 that abuts against the fixed blade holder 2 and a pressing mold strip 51 located on both sides of the pressing member body 50 and capable of sliding against the moving blade 3.

[0063] In this example, the fixed tool holder 2 includes a first seat body 21 extending along the length direction of the fixed tool 1 and a second seat body 22 having a through groove 2a, wherein the first seat body 21 is fixed on the fixed tool 1 and the second seat body 22 is connected to the first seat body 21 at the end.

[0064] The first base 21 includes a frame plate 210 fixed in the middle of the fixed blade 1 and end plates 211 located at both ends of the frame plate 210. The moving blade 3 is attached to the frame plate 210 and reciprocates between the two end plates 210.

[0065] The second seat 22 is rotatably mounted on the flip connecting seat 6 from both ends via the pivot z, and grooves 10a are formed at both ends of the fixed blade 1. The flip reset member 7 is a torsion spring respectively sleeved on the pivot z, and the two torsion arms of each torsion spring abut against the flip connecting seat 6 and the fixed blade 1 respectively.

[0066] The flip-up connector 6 includes a support arm 60 with an open opening, and a pivot z is rotatably mounted on the support arm 60. The two torsion arms of each torsion spring respectively abut against the slots 10a of the support arm 60 and the fixed blade 1. This facilitates the installation of the torsion springs and also makes it easy to select and adjust the flip-up angle.

[0067] At the same time, the second body 22 connects with the end plate 211 from both ends and forms a circumferentially closed cavity q.

[0068] The surrounding cavity q includes a strip cavity q1 extending along the length direction of the fixed blade 1 and having a through groove 2a on its bottom surface, a first limiting cavity q2 and a second limiting cavity q3 located at both ends of the strip cavity q1 and whose bottom surfaces gradually bend inward, wherein the bent portion forms a first crease h1 and a second crease h2.

[0069] The elastic pressing element 5 is located inside the cavity q, and the trimming teeth 30 protrude from opposite sides of the cavity q and slide against the comb teeth 10.

[0070] Specifically, a clearance groove 500 is formed on the pressing body 50 to allow the movement of the moving blade holder 4. The pressing die strip 51 extends along the length of the moving blade 3, and the pressing die strip 51 keeps the moving blade 3 and the fixed blade 1 in elastic contact. It should be noted that the magnitude of the elastic resistance provided by the elastic pressing part 5 is determined by the distance between the second seat 22 and the frame plate 210. The smaller the distance, the greater the elastic resistance provided.

[0071] The press-fit body 50 is attached to the bottom surface of the strip cavity q1 and abuts against the first crease h1 and the second crease h2 from both ends respectively.

[0072] The pressing body 50 includes a panel 50a and two side plates 50b located on both sides of the panel 50a and gradually opening outwards. The clearance groove 500 is provided on the panel 50a and the side plates 50b. When the pressing body 50 abuts against the strip cavity q1 from the panel 50a, the side plates 50b open relative to each other and drive the pressing die strip 51 to press against the moving knife 3.

[0073] The pressing die 51 is bent outward from the edge of the side plate 50b away from the panel 50a. In this way, the resulting pressing die has strong resistance to deformation, thereby achieving better pressing and guiding effects.

[0074] The length of the pressing die 51 is equal to the length of the moving blade 3. In this way, not only is the contact area between the pressing die and the moving blade reduced during reciprocating motion, but uniform pressing is also maintained, which greatly reduces the probability of movement gaps between the moving blade and the stationary blade.

[0075] After the first seat 21 and the second seat 22 are installed, the outer contours of the clearance groove 500 and the through groove 2a are aligned.

[0076] The moving blade holder 4 includes a base body 40 extending along the length of the moving blade 3, and a power docking portion 41 disposed in the middle of the base body 40 and connected to the power output component. The power docking portion 41 extends through the clearance groove 500 and the through groove 2a and is slidably disposed in the clearance groove 500 and the through groove 2a. This facilitates the fitting and assembly of the moving blade and the implementation of motion shearing.

[0077] There are two end caps 8, each sleeved on the end of the fixed blade 1. The end cap 8 covers the groove 10a and abuts against the torsion arm. The end caps protect the user's skin from being scratched by the fixed blade. At the same time, the torsion arm can be installed and limited, which also enhances the overall shape and aesthetics.

[0078] Meanwhile, the flip-connector 6 is inserted into the care device through the housing 9. The power output transmission component of the care device passes through the flip-connector 6 and is connected to the power docking part 41. In this way, as long as the housing 9 and the care device are assembled and the power is started, reciprocating shearing can be performed.

[0079] In addition, combined Figures 7 to 10 As shown, the fixed blade 1 is integrally formed by stamping and grinding, and includes a fixed blade body 1a with comb teeth 10 formed on both sides in the length direction. The comb teeth 10 are formed by stamping, and an inwardly recessed tooth groove c is formed between two adjacent comb tooth bodies 10c. Grinding makes the tip of each comb tooth body 10c have a comb ball head 12.

[0080] The two ends of the fixed blade body 1a form end modules 11, wherein an inwardly recessed tooth groove c is formed between the end module 11 and the corresponding comb tooth body 10c, and between two adjacent comb tooth bodies 10c.

[0081] Comb grooves s are formed between each pair of adjacent combing heads 12 and between the end module 11 and the combing head 12.

[0082] Specifically, in the orthographic projection of the fixed blade 1 in the thickness direction, the tooth groove c is connected to the comb groove s, and the comb groove s includes a first groove area s1 that moves inward from the open end of the tooth groove c and shrinks its opening, and a second groove area s2 that opens outward from the outer end of the first groove area s1.

[0083] In this example, taking two adjacent comb teeth 10c as an example, and combining them with the corresponding combing ball head 12, the following size design is carried out.

[0084] The minimum width w1 of the contraction opening formed by the first groove s1, and the maximum width w2 of the open end of the tooth groove c, where w1 is 0.75 times w2. In this example, w1 = 0.6 mm and w2 = 0.8 mm.

[0085] In this example, the tooth grooves c are U-shaped and symmetrically arranged along the central axis, and two adjacent comb heads 12 are symmetrically distributed about the central axis of the U-shape. This facilitates stamping and forming.

[0086] The minimum width of the tooth groove is w3, where w3 > w1. In this example, w3 = 0.64 mm. This not only achieves a good combing effect but also improves shearing efficiency.

[0087] In this example, w3-w1 = 0.04mm, w2-w1 = 0.2mm, meaning that the value of w2-w1 is five times the value of w3-w1. Within this width constraint, the resulting combing and shearing effects are optimal.

[0088] The maximum width of the outward-opening end of the second groove s2 is greater than the maximum width of the open end of the tooth groove c. This allows the hair to be combed more smoothly towards the first groove.

[0089] Each comb head 12 protrudes outward from the circumferential surface of its corresponding tooth tip. This not only prevents accidental damage and deformation caused by tooth tip collisions, but also ensures that there is no probability of skin injury at any contact angle.

[0090] Each combing ball head 12 is aligned and distributed along the length of the fixed blade body 1a. This facilitates forming processes such as stamping and grinding.

[0091] The center line of each comb tooth 10c is set to coincide with the center line of the comb ball head 12.

[0092] In summary, this embodiment has the following advantages:

[0093] 1. On the one hand, the fixed blade formed by stamping and grinding is not only easy to process, but also has a connection between the tooth groove and the comb groove, which reduces the amount of hair squeezed out from the tooth groove, improving the cutting efficiency and effect. At the same time, with the comb ball head setting, it not only increases contact comfort and enhances the user experience, but also reduces the damage rate of the tooth tip and extends the service life. On the other hand, through the elastic pressing and sliding guide docking of the pressing parts, the movement gap between the moving blade and the fixed blade is avoided during the reciprocating motion, thereby improving the cutting efficiency and effect between the moving blade and the fixed blade, thus enhancing the user experience. At the same time, the blade head can rotate around the pivot, so that it can trim hair at the required angle, which is highly practical.

[0094] 2. The protruding and aligned layout of each comb head not only prevents accidental damage and deformation caused by tooth tip collision, but also ensures that the probability of skin injury is not caused at any contact angle; in addition, it facilitates the stamping and grinding forming of the fixed blade.

[0095] 3. Within the set dimensions, it can not only achieve a good combing effect, but also significantly improve the cutting efficiency. At the same time, the resulting structure is simple, easy to process, and low in cost.

[0096] 4. The rounded outward-turned pressing strip is used, and the length of the pressing strip is equal to the length of the moving blade. In the reciprocating motion, it not only reduces the contact area between the pressing strip and the moving blade, but also maintains uniform pressing, which greatly reduces the probability of movement gap between the moving blade and the fixed blade. At the same time, combined with the external support opening of the body to maintain elastic resistance, it avoids movement gap between the moving blade and the fixed blade. Moreover, the magnitude of the elastic resistance can be adjusted according to the needs of the movement to install the distance between the second base and the frame plate.

[0097] 5. The blade assembly adopted is based on the comb teeth of the fixed blade, which not only facilitates the assembly of the moving blade and the fixed blade, but also produces the best close-fitting shearing effect. In addition, the structure is simple and does not require too many or complicated positioning methods.

[0098] 6. With the protection of the end, the phenomenon of skin scratches caused by the fixed blade is further avoided. At the same time, the torsion arm can be installed and limited, which also increases the overall shape and aesthetics. In addition, the groove design is more conducive to the stable installation of the torsion spring and the implementation of flipping and resetting.

[0099] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A cutter head assembly based on a fixed cutter formed by stamping and grinding, comprising a fixed cutter, a fixed cutter holder, a moving cutter, and a moving cutter holder, wherein the fixed cutter and the moving cutter respectively form comb teeth and trimming teeth from their respective sides along the length direction, and the moving cutter holder and the power docking portion protrude from the fixed cutter holder, characterized in that: The fixed blade is integrally formed using stamping and grinding processes, and includes a fixed blade body with comb teeth formed on both sides along its length. The comb teeth are formed by stamping, and an inwardly recessed tooth groove is formed between two adjacent comb teeth. Grinding causes the tips of each comb tooth to form combing balls, and a comb groove is formed between each pair of adjacent combing balls. In the orthographic projection of the fixed blade in the thickness direction, the tooth groove and the comb groove are connected. The comb groove includes a first groove area that moves inward from the open end of the tooth groove and narrows its opening, and a second groove area that opens outward from the outer end of the first groove area. The minimum width w1 of the narrowed opening formed by the first groove area and the maximum width w2 of the open end of the tooth groove are both w1, where w1 is 0.5 to 0.9 times w2. The tooth groove is U-shaped and symmetrically arranged along the central axis, and two adjacent combing balls are symmetrically distributed about the central axis of the U-shape. The minimum width of the tooth groove is w3, where w3 ≥ w1. The cutter head assembly also includes an elastic pressing member that slides against the moving cutter to maintain the moving cutter's relative fit to the fixed cutter's movement trend, a flipping connecting seat, and a flipping reset member. The fixed cutter seat is rotatably mounted on the flipping connecting seat from both ends via a pivot. The flipping reset members are torsion springs respectively sleeved on the pivot, with the two torsion arms of each torsion spring abutting against the flipping connecting seat and the fixed cutter respectively. The elastic pressing component includes a pressing component body and pressing mold strips located on both sides of the pressing component body and capable of sliding against the moving blade; the fixed blade holder includes a first seat body extending along the length direction of the fixed blade and a second seat body having a through groove, wherein the first seat body is fixed on the fixed blade, the second seat body is connected to the first seat body at the end, a relief groove is formed on the pressing component body to avoid the movement of the moving blade holder, the relief groove and the through groove are connected through, and the pressing component body abuts against the second seat body; the first seat body includes a frame plate fixed in the middle of the fixed blade and end plates located at both ends of the frame plate, the moving blade is attached to the frame plate and reciprocates between the two end plates, the second seat body is connected to the end plates from both ends respectively, forming a circumferentially relatively closed cavity, the elastic pressing component is located in the cavity, and the trimming teeth protrude from opposite sides of the cavity and slide against the comb teeth.

2. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 1, characterized in that: w3-w1≤(w2-w1) / 2; and / or, the maximum width of the outwardly open end of the second groove area is greater than the maximum width of the open end of the tooth groove.

3. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 1, characterized in that: Each of the combing balls protrudes outward from the circumferential surface of its corresponding tooth tip; and / or, each of the combing balls is aligned and distributed along the length of the fixed blade body.

4. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 1, characterized in that: The flip-connector includes a frame arm with an open opening, the pivot is rotatably mounted on the frame arm, and the two torsion arms of each torsion spring respectively abut against the frame arm and the fixed blade.

5. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 4, characterized in that: Grooves are formed at both ends of the fixed blade, and the two torsion arms of each torsion spring abut against the inner walls of the support arm and the fixed blade, respectively; or, the two torsion arms of each torsion spring abut against the grooves of the support arm and the fixed blade, respectively.

6. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 1, characterized in that: The pressing die strip extends along the length of the moving blade, and the pressing die strip maintains the moving blade and the fixed blade in elastic contact under the internal support deformation of the pressing part body.

7. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 1, characterized in that: The comb teeth and the trimming teeth form a relatively close moving plane, and the frame plate is flush with the moving plane.

8. The tool head assembly based on a fixed tool formed by stamping and grinding according to claim 7, characterized in that: The press-fit body includes a panel and two side plates located on both sides of the panel and gradually opening outwards, wherein the clearance groove is provided on the panel and / or the side plates; and / or, the press-fit strip is bent outwards or inwards from the edge of the side plate away from the panel; and / or, the length of the press-fit strip is equal to the length of the moving blade; and / or, after the fixed blade holder is installed, the clearance groove and the outer contour of the through groove are aligned.

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