A cutting head for a hair trimmer

Abstract

This utility model provides a hair trimmer head, including a support assembly. A fixed blade and a movable blade are connected to the support assembly for mutual cooperation. The fixed blade has a straight surface and a first inclined surface, which are connected by a first curved transition to form a beveled section. The beveled section has a plurality of first cutting grooves spaced apart. The movable blade has movable blade teeth corresponding to the beveled section. A second curved transition is also connected between the first curved section and the straight surface, forming tooth tips on the beveled section. At least a portion of the tooth tips is located above the extension line Q1 of the outer surface of the straight surface. During use, this ensures that hair is effectively guided into the blade area and allows for pre-trimming of tangled hair by the tooth tips, reducing skin irritation. Simultaneously, it allows the trimmer head to perfectly conform to the skin, resulting in a more thorough trim, higher efficiency, and a better user experience.

Description

Technical Field

[0001] This utility model belongs to the field of hair trimming technology, specifically relating to the blade of a hair trimmer. Background Technology

[0002] In actual production, advancements in fixed-blade technology directly impact shaving comfort and efficiency. From early simple metal mesh to modern precision laser micropores and multi-layered composite structures, its development has consistently revolved around the goals of more efficient cutting and greater safety and comfort. Because the fixed blade is on the outside and the moving blade is on the inside, the fixed blade comes into direct contact with the skin. Due to the unique structure of the human face and body, the trimming angle needs to be constantly changed to adapt to the curves of the skin for a more thorough trim. However, existing fixed blades are typically flat or have an outward-protruding structure, which prevents the edges from perfectly conforming to the skin. Furthermore, when the hair is too long or unruly, trimming can easily cause pulling on the skin, leading to irritation and a poor user experience. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] This invention provides a blade head for a hair trimmer, aiming to solve the problems of poor fit between the fixed blade and the skin and poor user experience in the prior art.

[0005] (2) Technical solution

[0006] This utility model provides a hair trimmer blade head, including a support assembly. The support assembly is connected to a fixed blade and a moving blade that cooperate with each other. The fixed blade has a straight surface and a first inclined surface. The straight surface and the first inclined surface are connected by a first bend to form a beveled section. The beveled section is provided with a plurality of first cutting grooves at intervals. The moving blade is provided with moving blade teeth corresponding to the beveled section. The first bend and the straight surface are also connected by a second bend, so that the beveled section forms a tooth tip.

[0007] Furthermore, at least a portion of the tooth tip is located above the extension line Q1 of the flat outer surface.

[0008] Furthermore, a second inclined surface provides a transitional connection between the first bend and the second bend.

[0009] Furthermore, a third bend provides a transitional connection between the first bend and the first inclined plane.

[0010] Furthermore, a second inclined surface provides a transitional connection between the first bend and the second bend, and a third inclined surface provides a transitional connection between the first bend and the third bend.

[0011] Furthermore, there are two oblique cut portions symmetrically arranged about the central axis of symmetry H.

[0012] Furthermore, the flat surface is distributed on both sides of the central axis of symmetry H, including a first groove portion of the flat surface, a solid portion of the flat surface, and a second groove portion of the flat surface. The second groove portion of the flat surface is provided with a plurality of small holes, and the moving blade is provided with an elongated hole that cooperates with the small holes.

[0013] Furthermore, the first groove portion of the flat surface and the solid portion of the flat surface are inclined downward toward the tooth tip, so that the two flat surfaces form a structure that extends horizontally in the middle and is inclined downward on both sides.

[0014] Furthermore, the support assembly includes a fixed tool holder and a movable tool holder. The fixed tool holder is fixedly connected to the fixed tool, and the movable tool holder is fixedly connected to the movable tool. The fixed tool holder is provided with a through groove, and the movable tool holder is provided with a second connecting part passing through the through groove. The second connecting part is provided with a mounting cavity connected to the drive shaft of the power element.

[0015] Furthermore, the fixed tool holder and the fixed tool form a receiving cavity, the movable tool holder and the movable tool are located in the receiving cavity, and an elastic element is also provided in the receiving cavity. The two ends of the elastic element respectively exert reverse pressure on the movable tool holder and the fixed tool holder, so that the movable tool and the fixed tool are kept in a tight fit for use.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The fixed blade has a flat surface and a first bevel. The flat surface and the first bevel are connected by a first curved arc transition, and the first bevel and the flat surface are connected by a second curved arc transition, so that a tooth tip is formed between the flat surface and the first bevel. At least part of the tooth tip is located above the extension line Q1 of the outer surface of the flat surface. In use, it can ensure that the hair is effectively guided into the blade range, and can also pre-tidy up the messy hair through the tooth tip to reduce skin irritation. At the same time, it can also make the blade head fit perfectly with human skin, so that the trimming is more thorough and efficient, and the user experience is better. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is an exploded view of the overall structure of this utility model.

[0020] Figure 3 This is a transverse sectional view showing the relationship between the flat cut and the oblique cut of this utility model.

[0021] Figure 4 This is a schematic diagram of a structure with rigid defects in the bevel cutting section of a fixed blade in existing technology.

[0022] Figure 5 A schematic diagram of the structure of Embodiment 1, which adds rigidity to the fixed blade oblique cutting part of this utility model.

[0023] Figure 6 A schematic diagram of Embodiment 2 showing the addition of rigidity to the fixed blade oblique cutting part of this utility model.

[0024] Figure 7 A schematic diagram of embodiment three, which adds rigidity to the fixed blade oblique cutting part of this utility model.

[0025] Figure 8 A schematic diagram of embodiment four showing the addition of rigidity to the fixed blade oblique cutting section of this utility model.

[0026] Figure 9 This is a schematic diagram of the flat surface of the fixed blade of this utility model.

[0027] Figure 10 This is a schematic diagram of the fixed blade and moving blade of this utility model.

[0028] Figure 11 This is a schematic diagram showing the flat cut portion of this utility model in use.

[0029] Figure 12 This is a schematic diagram of the improved flat surface of the fixed blade in this utility model.

[0030] Figure 13 This is a schematic diagram showing the oblique cut portion of this utility model in use.

[0031] Figure 14 This is a cross-sectional view of the overall structure of this utility model.

[0032] Figure 15 This is a schematic diagram of the connection structure between the fixed tool and the fixed tool holder of this utility model.

[0033] Figure 16 This is a schematic diagram of the connection between the moving tool, the moving tool holder, and the fixed tool holder of this utility model.

[0034] Figure 17 This is a schematic diagram of the recessed area of ​​the connecting frame of this utility model.

[0035] Reference numerals: 1-Bracket assembly, 11-Moving blade holder, 111-Drive frame, 1111-First connecting part, 1112-Second connecting part, 11121-Mounting cavity, 1113-Fixing post, 1114-First elongated hole, 112-Connecting frame, 1121-Recessed area, 1122-Through hole, 1123-Second elongated hole, 113-Protrusion, 12-Fixing blade holder, 121-Fixing block, 122-Through groove, 123-Auxiliary positioning structure, 1231-First limiting block, 1232-Second limiting block, 1233-First protrusion, 1234-Second protrusion, 1235-Stop block, 124-Limiting protrusion, 13-Elastic element, 2-Fixing blade, 21-Flat cutting part, 211-Second shearing groove, 2111-Small hole, 22-Beveled cutting part, 221-First shearing groove, 2 211-Tooth tip, 222-First inclined surface, 2221-First inclined surface groove, 2222-First inclined surface solid part, 223-Second inclined surface, 224-Straight surface, 2241-Straight surface first groove, 2242-Straight surface solid part, 2243-Straight surface second groove, 225-Connecting part, 2251-Fixing hole, 2252-Groove, 226-First bend, 227-Second bend, 228-Third bend, 229-Third inclined surface, 3-Moving blade, 31-Moving blade tooth, 311-Inclined end, 32-“V” groove, 33-First cutting area, 34-Second cutting area, 341-Elongated hole, 4-Receiving cavity, P-Extension line of inclined cut, Q-Extension line of flat cut, Q1-Extension line of outer surface of straight surface, H-Central symmetry axis, L1-Moving blade moving direction. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0037] like Figure 1-3 As shown, this utility model provides a hair trimmer blade head, including a support assembly 1. The support assembly 1 is connected to a fixed blade 2 and a moving blade 3 that cooperate with each other. The fixed blade 2 has a rectangular flat cutting portion 21. The flat cutting portion 21 has symmetrically arranged outwardly inclined oblique cutting portions 22 on both sides perpendicular to the moving direction of the moving blade 3. The oblique cutting portions 22 are provided with a plurality of first cutting grooves 221 at intervals. The moving blade 3 is provided with moving blade teeth 31 corresponding to the first cutting grooves 221. Each moving blade tooth 31 corresponds to at least one first cutting groove 221. The extension line P of the oblique cutting portion and the extension line Q of the flat cutting portion form an angle A, which is an acute angle. This makes the fixed blade 2 form a transition structure with a straight middle and upward inclined sides, so that the ends of the first cutting grooves 221 form thinner tooth tips 2211, which can enhance the rigidity of the blade, improve its bending resistance, and keep the blade sharp and not easily deformed.

[0038] like Figure 4 The diagram shows an example of a fixed blade beveling structure in the prior art. The fixed blade 2 is composed of a flat second grooving section 2243, a flat solid section 2242, a flat first grooving section 2241, a first bend 226, a first beveling section 2221, and a first beveling solid section 2222 connected sequentially. The flat second grooving section 2243, the flat solid section 2242, and the flat first grooving section 2241 together form a flat surface 224. The first beveling section 2242... The first inclined surface 222 is formed by the first inclined surface solid part 2222 and the first inclined surface cutting part 2221 and the flat surface first cutting part 2241 are only connected by the first bend 226. Under this structure, the fixed blade 2 is completely located below the extension line Q1 of the outer surface of the flat surface, which makes the tooth tip 2211 formed on the inclined cutting part 22 relatively blunt, which is not conducive to pre-combing the hair. Moreover, during trimming, the tooth tip 2211 is easily deformed due to lack of rigidity. Therefore, this utility model has made further improvements in this regard.

[0039] Specifically, such as Figure 5 As shown, the fixed blade 2 has a flat surface 224 and a first inclined surface 222. The flat surface 224 and the first inclined surface 222 are connected by a first bend 226 to form the oblique cutting portion 22. The flat cutting portion 21 is disposed on the flat surface 224. A second bend 227 is also connected between the first bend 226 and the flat surface 224, so that the tooth tip 2211 is formed on the oblique cutting portion 22. In this structure, at least a part of the tooth tip 2211 is located above the extension line Q1 of the outer surface of the flat surface. When in use, the tooth tip 2211 can accurately capture long beards, which is especially suitable for trimming complex contours such as the chin and neck, ensuring that the hair is effectively guided into the blade range. At the same time, it can also pre-tidy up the messy hair, making it stand up and evenly guide the blade, improving cutting efficiency, reducing repeated shaving, and making the movement smoother and the trimming more thorough. Furthermore, the first bend 226 prevents the teeth 2211 from being too sharp and causing skin injury during use, while the second bend 227 allows the trimmer to better conform to the structure of the transition area of ​​the human face curve, enabling more thorough and cleaner trimming in one go, reducing skin irritation, and avoiding repeated back-and-forth trimming, resulting in higher efficiency and a better user experience.

[0040] Furthermore, in order to enable the oblique cut portion 22 to extend the length of the tooth tip, change the direction of the tooth tip, and set the curvature of the tooth tip as needed, while forming the tooth tip 2211 to enhance rigidity, this utility model also provides various embodiments including but not limited to the following:

[0041] In some embodiments, such as Figure 6As shown, a second inclined surface 223 is provided between the first bend 226 and the second bend 227, at which time the tooth tip 2211 becomes longer than the original bend.

[0042] In some embodiments, such as Figure 7 As shown, a second bend 227 is connected between the first bend 226 and the straight surface 224, and a third bend 228 is also connected between the first bend 226 and the first inclined surface 222. At this time, the included angle A becomes larger, the curvature of the tooth tip 2211 increases, and it can better penetrate into the root of the hair to comb the hair.

[0043] In some embodiments, such as Figure 8 As shown, a second inclined surface 223 is provided between the first bend 226 and the second bend 227, and a third inclined surface 229 is provided between the first bend 226 and the third bend 228. At this time, the curvature and length of the tooth tip 2211 are increased, making it more suitable for trimming long and messy hair.

[0044] Furthermore, such as Figure 9-11 As shown, the oblique cutting portions 22 are symmetrically arranged on both sides of the fixed blade 2, and the flat surfaces 224 are distributed on both sides of the central axis of symmetry H. Since the flat surface 224 includes a first flat cutting groove portion 2241, a solid flat surface portion 2242, and a second flat cutting groove portion 2243, the two second flat cutting groove portions 2243 form the flat cutting portion 21 of the fixed blade 2. The second flat cutting groove portion 2243 is provided with a plurality of small holes 2111, and the small holes 2111 form the second shearing groove 211 of the flat cutting portion 21. The central region of the moving blade 3 is provided with a plurality of elongated holes 341 that cooperate with the small holes 2111. The small holes 2111 and the elongated holes 341 are interconnected. Arranged in a racetrack shape and spaced apart, the moving blade 3 moves in the direction of L1, and the extension direction of the elongated hole 341 is perpendicular to the moving direction of L1. The elongated hole 341 forms the second cutting area 34 of the moving blade 3. In use, shorter stubble hairs can enter through the small hole 2111 and pass through the elongated hole 341. Thus, under the movement of the moving blade 3, precise trimming of short hairs can be achieved. Especially when trimming shorter stubble hairs at the bottom of the chin, the user can use the second cutting groove 211 on the flat surface 224 to cooperate with the elongated hole 341 on the moving blade 3 to quickly trim the stubble hairs on the chin. It is more flexible to use and more adaptable to trimming hair on different parts of the human body.

[0045] Preferably, in this embodiment, the small holes 2111 are circular, and the small holes 2111 are arranged alternately. In other embodiments, the small holes 2111 can also be polygonal, honeycomb, or other shapes, and there is no limitation, as long as the effect of hair passing through can be achieved.

[0046] In some embodiments, such as Figure 12 As shown, the first cutting groove portion 2241 and the solid portion 2242 of the flat surface are inclined outward and downward toward the tooth tip 2211, so that the two flat surfaces 224 form a structure that extends horizontally in the middle and is inclined downward on both sides. The corresponding extension lines Q1 of the outer surfaces of the two flat surfaces are also inclined outward and downward. The advantage of this structure is that it reduces the contact area between the flat surface 224 and the skin when cutting hair, thereby reducing friction and improving the smoothness of use. Specifically, when the left flat surface 224 slides close to the skin, the right flat surface 224 is away from the skin, and when the right flat surface 224 slides close to the skin, the left flat surface 224 is away from the skin.

[0047] Furthermore, such as Figure 10 , Figure 13 As shown, the moving blade teeth 31 on both sides of the moving blade 3 form the first cutting area 33, which corresponds to the first shearing groove 221. A "V"-shaped groove 32 is formed between two adjacent moving blade teeth 31. The opening of the "V"-shaped groove 32 faces the first shearing groove 221. The first shearing groove 221 and the "V"-shaped groove 32 overlap and abut each other at the position of the flat surface 224. After the hair enters from the first shearing groove 221, it will fall at the position that overlaps with the "V"-shaped groove 32, and then pass through... When the moving blade 3 is driven to move relative to the fixed blade 2, it can cut the hair. The moving blade 3 is set inside the fixed blade 2, which can form protection for the moving blade 3 and ensure the safety of the user. The front end of the moving blade tooth 31 has an inclined end 311 that matches the oblique cutting part 22, so that the moving blade tooth 31 can become longer and sharper, thereby cutting more hair at once. In this embodiment, the moving blade 3 is a straight blade, which is more conducive to the direct processing and forming of metal sheet, thereby optimizing the processing cost.

[0048] Furthermore, such as Figure 14As shown, the support assembly 1 includes a movable blade holder 11 and a fixed blade holder 12. The fixed blade holder 12 is used to fix the fixed blade 2. The movable blade holder 11 is fixedly connected to the movable blade 3. The fixed blade holder 12 has fixed blocks 121 integrally formed at both ends that are adapted to the shape of the two ends of the fixed blade 2. The two ends of the fixed blade 2 are in the L1 direction. The inner wall of the fixed block 121 abuts against the ends of the fixed blade 2 or is connected and fixed with adhesive or sol, thereby sealing the two ends of the fixed blade 2 and preventing dust and other debris from entering, thereby increasing the friction of the movable blade 3.

[0049] Preferably, such as Figure 15 As shown, to further enhance the stability of the connection between the fixed tool 2 and the fixed tool holder 12, the fixed tool holder 12 is also provided with an auxiliary positioning structure 123. The auxiliary positioning structure 123 includes a first limiting block 1231 and a second limiting block 1232. The first limiting block 1231 is provided with a first protrusion 1233, and the second limiting block 1232 is provided with a second protrusion 1234. The ends of the two first inclined surfaces 222 that are close to each other are respectively provided with downwardly bent connecting portions 225. The connecting portions 225 are respectively provided with... The fixing holes 2251 and grooves 2252 that are adapted to the first protrusion 1233 and the second protrusion 1234 can be forcefully applied during assembly to elastically move the two first inclined surfaces 222 away from each other, enough to fit the fixing hole 2251 onto the first protrusion 1233. At this time, the groove 2252 is correspondingly engaged with the second protrusion 1234, and the inner wall of the connecting part 225 forms an interference fit with the outer walls of the first limiting block 1231 and the second limiting block 1232 to fix the fixed blade 2. The connection between the fixed blade 2 and the fixed blade holder 12 can also be further reinforced by bonding or welding.

[0050] Furthermore, such as Figure 16As shown, the moving tool holder 11 includes a drive frame 111 and a connecting frame 112. One end of the connecting frame 112 is connected to the drive frame 111, and the other end is connected to the moving tool 3. The connection method between the connecting frame 112 and the moving tool 3 can be any method that can achieve the connection, such as snap-fit, welding or bonding, and there is no restriction here. The fixed tool holder 12 is provided with a through groove 122, and the movable tool holder 11 is provided with a second connecting part 1112 passing through the through groove 122. The second connecting part 1112 is provided with a mounting cavity 11121 connected to the drive shaft of the power element. The second connecting part 1112 is provided on the drive frame 111. Specifically, in this embodiment, the drive frame 111 has a "T" shaped structure, including a horizontal first connecting part 1111 and a vertical second connecting part 1112. The first connecting part 1111 is provided with two fixed posts 1113 in the direction facing the connecting frame 112. The connecting frame 112 is provided with through holes 1122 corresponding to the two fixed posts 1113, so that the movement of the drive frame 111 can directly drive the movement of the connecting frame 112, and then drive the movement of the movable tool 3 connected to the connecting frame 112.

[0051] Preferably, such as Figure 17 As shown, the connecting frame 112 has a recessed area 1121. The recessed area 1121 avoids the cutting of the flat cutting part 21, so that shorter hairs have room to be accommodated when passing through the second cutting area 34, and the hair scraps after trimming can fall into the recessed area 1121, preventing too much hair from piling up on the second cutting area 34 and increasing the resistance of the reciprocating movement of the moving blade 3.

[0052] Furthermore, such as Figure 15-16 As shown, the fixed blade holder 12 and the fixed blade 2 form a receiving cavity 4. The movable blade holder 11 and the movable blade 3 are located in the receiving cavity 4. An elastic element 13 is also provided in the receiving cavity 4. The two ends of the elastic element 13 respectively exert reverse pressure on the movable blade holder 11 and the fixed blade holder 12, so that the movable blade 3 and the fixed blade 2 are kept in a close fit and can prevent hair from falling into the gap between the movable blade 3 and the fixed blade 2, making it easier to trim hair.

[0053] Specifically, the fixed blade holder 12 has limiting protrusions 124 at both ends facing the movable blade holder 11, and the connecting frame 112 has protrusions 113 corresponding to the limiting protrusions 124. The two ends of the elastic member 13 elastically abut against the corresponding limiting protrusions 124 and protrusions 113. Because the elastic member 13 has an elastic force perpendicular to the moving direction of the movable blade 3, the movable blade 3 always remains close to or in close contact with the fixed blade 2. Simultaneously, during the movement of the movable blade 3, the two elastic members 13 deform as the movable blade 3 moves. The deformed elastic members 13 have a pulling force that automatically returns to its original position in the opposite direction. Therefore, this pulling force can also provide a certain driving force for the movable blade 3, thereby enabling more precise shaving. In this embodiment, the elastic member 13 is a spring.

[0054] Preferably, to prevent the moving blade 3 from moving too fast and colliding with the fixed blade holder 12, thus causing damage to the trimmer and increasing noise, the second limiting block 1232 has a stop block 1235 extending toward the moving blade holder 11. The drive frame 111 and the connecting frame 112 are respectively provided with a first elongated hole 1114 and a second elongated hole 1123. The stop block 1235 passes through the first elongated hole 1114 and the second elongated hole 1123 in sequence and is located at their center. When the moving blade 3 is driven too fast, the moving blade holder 11 will be blocked by the stop block 1235, thus buffering the moving speed of the moving blade 3, preventing the trimmer from being easily damaged, and improving its service life.

[0055] The innovation of this utility model lies in the fact that the fixed blade 2 is provided with a flat surface 224 and a first inclined surface 222. The flat surface 224 and the first inclined surface 222 are connected by an arc transition of a first bend 226, and the first bend 226 and the flat surface 224 are connected by an arc transition of a second bend 227, so that a tooth tip 2211 is formed between the flat surface 224 and the first inclined surface 222, and at least a portion of the tooth tip 2211 is located above the extension line Q1 of the outer surface of the flat surface. In use, it can ensure that the hair is effectively guided into the blade range, and can also pre-sort out messy hair through the tooth tip 2211 to reduce skin irritation. At the same time, it can also make the blade head fit perfectly with human skin, so that the trimming is more thorough and efficient, and the user experience is better.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hair trimmer blade, comprising a support assembly (1), characterized in that, The support assembly (1) is connected to a fixed blade (2) and a moving blade (3) that cooperate with each other. The fixed blade (2) is provided with a flat surface (224) and a first inclined surface (222). The flat surface (224) and the first inclined surface (222) are connected by a first bend (226) to form a beveled section (22). The beveled section (22) is provided with a plurality of first shearing grooves (221) at intervals. The moving blade (3) is provided with moving blade teeth (31) corresponding to the beveled section (22). The first bend (226) and the flat surface (224) are also connected by a second bend (227) to form a tooth tip (2211) on the beveled section (22).

2. The blade of a hair trimmer according to claim 1, characterized in that, At least a portion of the tooth tip (2211) is located above the extension line Q1 of the outer surface of the flat surface.

3. The blade of a hair trimmer according to claim 1, characterized in that, A second inclined surface (223) provides a transition between the first bend (226) and the second bend (227).

4. The blade of a hair trimmer according to claim 1, characterized in that, A third bend (228) is provided as a transition between the first bend (226) and the first inclined plane (222).

5. The blade of a hair trimmer according to claim 4, characterized in that, A second inclined surface (223) is provided as a transition between the first bend (226) and the second bend (227), and a third inclined surface (229) is provided as a transition between the first bend (226) and the third bend (228).

6. The blade of a hair trimmer according to claim 1, characterized in that, The oblique cut (22) is arranged in two symmetrically about the central axis of symmetry H.

7. The blade of a hair trimmer according to claim 6, characterized in that, The flat surface (224) is distributed on both sides of the central axis of symmetry H, including a first groove portion (2241), a solid portion (2242), and a second groove portion (2243). The second groove portion (2243) is provided with a plurality of small holes (2111), and the moving blade (3) is provided with an elongated hole (341) that cooperates with the small holes (2111).

8. The blade of a hair trimmer according to claim 7, characterized in that, The first groove portion (2241) and the solid portion (2242) of the flat surface are arranged outward and downward toward the tooth tip (2211), so that the two flat surfaces (224) form a structure that extends horizontally in the middle and is inclined downward on both sides.

9. The blade of a hair trimmer according to claim 1, characterized in that, The bracket assembly (1) includes a fixed tool holder (12) and a movable tool holder (11). The fixed tool holder (12) is fixedly connected to the fixed tool (2), and the movable tool holder (11) is fixedly connected to the movable tool (3). The fixed tool holder (12) is provided with a through groove (122), and the movable tool holder (11) is provided with a second connecting part (1112) passing through the through groove (122). The second connecting part (1112) is provided with a mounting cavity (11121) connected to the drive shaft of the power element.

10. The blade of a hair trimmer according to claim 9, characterized in that, The fixed blade holder (12) and the fixed blade (2) form a receiving cavity (4). The moving blade holder (11) and the moving blade (3) are located in the receiving cavity (4). An elastic element (13) is also provided in the receiving cavity (4). The two ends of the elastic element (13) respectively exert reverse pressure on the moving blade holder (11) and the fixed blade holder (12), so that the moving blade (3) and the fixed blade (2) are kept in close contact for use.

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