Cutter head assembly and hair cutting device

Abstract

The embodiment of the utility model discloses a tool bit assembly and a hair cutting device. The tool bit assembly comprises a movable cutter, a static cutter and a guide rail, all of which extend in the first direction. The movable cutter can reciprocate along a first direction relative to the static cutter to realize shearing; a sliding groove is formed in the side, facing the static cutter, of the movable cutter. The guide rail comprises a main body part and a limiting part, the main body part extends in the first direction, and the limiting part is convexly arranged on the main body part in the second direction; the main body part is fixedly connected with the static knife and arranged in the sliding groove, the static knife is provided with a connecting part corresponding to the limiting part, and the limiting part is in limiting fit with the connecting part. According to the multiplex guide rail for the tool bit assembly, the main body part of the guide rail is fixedly connected with the static knife, and the limiting part of the guide rail is matched with the connecting part of the static knife in a limiting manner, so that the twisting tendency of the static knife under the influence of external force can be resisted, the static knife cannot be twisted, and the movable knife can be guided to reciprocate along the first direction; and the moving cutter is prevented from shaking.

Description

Technical Field

[0001] This application relates to the field of hair cutting devices, and particularly to a cutter head assembly and a hair cutting device. Background Art

[0002] Miniaturized hair cutting devices are more portable and meet the user's demand for portability. Whether during travel, business trips or daily life, small-sized hair cutting devices can bring great convenience to users. The cutter head assembly of a hair cutting device includes a stationary cutter and a moving cutter. The stationary cutter is located on the outside and the moving cutter is on the inside. The moving cutter can reciprocate relative to the stationary cutter to achieve cutting. To miniaturize the hair cutting device, the width of the stationary cutter has become narrower and narrower, but such a stationary cutter is prone to distortion. If the degree of distortion is large, it will affect the cooperation between the stationary cutter and the moving cutter. This will not only result in a worse hair cutting effect, but also generate additional noise.

[0003] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0004] In view of the above problems, the present utility model proposes a cutter head assembly, aiming to solve the technical problem that the stationary cutter in a traditional miniaturized hair cutting device is prone to distortion.

[0005] To achieve the above object, the cutter head assembly proposed by the present utility model includes a moving cutter, a stationary cutter and a guide rail that all extend along a first direction; the moving cutter can reciprocate relative to the stationary cutter along the first direction to achieve cutting; a chute is provided on the side of the moving cutter facing the stationary cutter; the guide rail includes a main body portion and a limiting portion, the main body portion extends along the first direction, and the limiting portion protrudes from the main body portion in a second direction; the main body portion is fixedly connected to the stationary cutter, and the main body portion is placed in the chute, and a connecting portion corresponding to the limiting portion is provided on the stationary cutter, and the limiting portion and the connecting portion are in limiting cooperation; wherein, the first direction and the second direction intersect.

[0006] Further, at least two of the connecting portions are provided on the stationary cutter at intervals in the first direction, and at least two limiting portions are provided on the main body portion at intervals in the first direction, and the connecting portion and the limiting portion are in limiting cooperation.

[0007] Further, the two connecting portions are provided at both ends of the stationary cutter along the first direction, and the connecting portion is a limiting hole; the two limiting holes are opened on the end surface of the stationary cutter in the first direction and have openings facing the first direction, and the two limiting portions are respectively embedded in the limiting holes.

[0008] Further, the stationary blade includes a stationary blade body and two stationary blade tooth portions that both extend along the first direction. The two stationary blade tooth portions are connected to both sides of the stationary blade body in the third direction, and the connecting portion is provided on the stationary blade body; the moving blade includes a moving blade body and two moving blade tooth portions that both extend along the first direction; the moving blade body includes a first connecting plate and two second connecting plates. The two second connecting plates are respectively connected to both sides of the first connecting plate in the third direction, and the first connecting plate and the two second connecting plates enclose to form the sliding groove; the two moving blade tooth portions are respectively connected to one sides of the two second connecting plates close to the stationary blade, and the two stationary blade tooth portions are respectively in contact with the two moving blade tooth portions; the first direction, the second direction, and the third direction intersect pairwise.

[0009] Further, the cutter head assembly further includes a stationary blade bracket fixedly connected to the stationary blade. The stationary blade bracket has two side plates that both extend along the first direction and are relatively spaced apart in the third direction; the side plates are convexly provided with mounting blocks in the second direction; the stationary blade is respectively provided with mounting holes on both sides of the connecting portion in the third direction; the mounting blocks are embedded in the mounting holes.

[0010] Further, the main body portion is placed in the sliding groove; a sliding gap is formed between the stationary blade and the side plates. The moving blade body is placed between the two side plates. The moving blade tooth portion passes through the sliding gap along the third direction, and the moving blade tooth portion can reciprocate along the first direction in the sliding gap.

[0011] Further, the cutter head assembly further includes two end covers. The two end covers are respectively fixedly connected to both ends of the stationary blade bracket in the first direction and cover both ends of the stationary blade in the first direction.

[0012] Further, the main body portion is welded to the stationary blade, and / or, the limiting portion is welded to the connecting portion.

[0013] The present utility model further provides a hair cutting device, including the cutter head assembly according to any one of the above embodiments.

[0014] The cutter head assembly of the present invention includes a movable knife, a stationary knife and a guide rail, all of which extend along a first direction; the movable knife can reciprocate along the first direction relative to the stationary knife to achieve shearing; a slide groove is provided on the side of the movable knife facing the stationary knife. The guide rail includes a main body and a limiting portion. The main body extends along the first direction, and the limiting portion is protruded from the main body in the second direction. The main body is fixedly connected to the stationary knife, and the main body is placed in the slide groove. A connecting portion corresponding to the limiting portion is provided on the stationary knife. The limiting portion and the connecting portion are in limiting cooperation. The cutter head assembly of the present invention reuses the guide rail. By fixedly connecting the main body of the guide rail to the stationary knife, placing the main body in the slide groove, and making the limiting portion of the guide rail and the connecting portion of the stationary knife cooperate in limiting cooperation, it can not only resist the distortion tendency of the stationary knife under the influence of external force, so that the stationary knife cannot be twisted, but also guide the movable knife to reciprocate along the first direction, avoiding the movable knife from shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic structural diagram of an embodiment of a cutter head assembly of the present invention is shown;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the middle cutter head assembly from another perspective;

[0018] Figure 3 for Figure 2 Exploded view of the middle cutter head assembly;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the middle static knife;

[0020] Figure 5 for Figure 3 Schematic diagram of the structure of the middle guide rail;

[0021] Figure 6 for Figure 1 A front view of the middle cutter head assembly;

[0022] Figure 7 for Figure 6 A cross-sectional view of the middle cutter head assembly along line VII-VII;

[0023] Figure 8 for Figure 6 A cross-sectional view of the middle cutter head assembly along line VIII-VIII;

[0024] Description of Figure Numbers:

[0025]

[0026]

[0027] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a specific posture. If the specific posture changes, then the directional indications will also change accordingly.

[0030] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, then the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes the A solution, or the B solution, or the solution where A and B are satisfied simultaneously.

[0031] The present utility model provides a cutter head assembly. The cutter head assembly can be used for trimming hair, such as trimming facial beards to keep the face clean.

[0032] In the embodiments of the present utility model, please refer to Figures 1 to 3 、 Figure 7 and Figure 8 , the cutter head assembly 100 includes a moving cutter 10, a stationary cutter 20 and a guide rail 30 that all extend along a first direction.

[0033] The moving blade 10 is usually made of a sharp blade to ensure quick and effective cutting of the beard. In the shaver, the motor can drive the moving blade 10 to reciprocate relative to the stationary blade 20 in the first direction to achieve shearing. A chute 62 is provided on the side of the moving blade 10 facing the stationary blade 20.

[0034] The guide rail 30 includes a main body portion 31 and a limiting portion 32. The main body portion 31 extends in the first direction and is strip-shaped, and its cross-section perpendicular to the first direction can be rectangular. The limiting portion 32 protrudes from the main body portion 31 in the second direction. The first direction is the length direction of the moving blade 10, and the second direction is the thickness direction of the moving blade 10.

[0035] On both sides of the stationary blade 20, a plurality of open knife holes arranged in the first direction are provided. These knife holes can capture the beard and guide the beard to the moving blade 10 for trimming. At the same time, the edge of the stationary blade 20 in contact with the skin is rounded to fit the facial curve and improve the safety of using the shaver. The stationary blade 20 can be made of corrosion-resistant and wear-resistant materials such as stainless steel to ensure that it remains sharp and smooth after long-term use.

[0036] The main body portion 31 of the guide rail 30 is fixedly connected to the stationary blade 20, and the main body portion 31 is placed in the chute 62. A connecting portion 21 corresponding to the limiting portion 32 is provided on the stationary blade 20. The limiting portion 32 and the connecting portion 21 are in limiting cooperation. In this way, the guide rail 30 provides stable support and fixation for the stationary blade 20 to resist the twisting tendency of the stationary blade 20, and the guide rail defines the movement trajectory of the moving blade 10, ensuring that the moving blade 10 does not shake during shaving, and ensuring the stability of the moving blade 10 and the stationary blade 20 during shaving. At the same time, the cutter head assembly 100 has a compact structure.

[0037] To miniaturize the hair shearing device, the width of the stationary blade 20 is designed to be narrower and narrower. However, when the blade of the stationary blade 20 is narrow, its section modulus of anti-bending will decrease, resulting in the stationary blade 20 being more likely to bend when subjected to an external force. At the same time, the reduction of the width of the blade of the stationary blade 20 means that the support area is reduced. When subjected to the same external force, the narrower blade has a smaller support area and is prone to deformation, thus showing distortion. Driven by the motor, the moving blade 10 moves quickly in the first direction. The narrower stationary blade 20 shakes due to the movement of the moving blade 10, resulting in distortion in the thickness direction of the stationary blade 20, and then the relative positional relationship between the stationary blade 20 and the moving blade 10 changes, leading to poor shearing effect, noise and other adverse consequences. In the related art, only the end of the stationary blade bracket 40 is fixedly connected to the lower end of the stationary blade 20, or only the end cover 50 is fixedly connected to the stationary blade 20 to solve the above problems. However, this connection relationship is not reliable, making the stationary blade 20 unable to resist the tendency of twisting in the thickness direction.

[0038] The cutter head assembly 100 of the present utility model reuses the guide rail 30. By fixedly connecting the main body portion 31 of the guide rail 30 to the stationary cutter 20, placing the main body portion 31 in the sliding groove 62, and making the limiting portion 32 of the guide rail 30 and the connecting portion 21 of the stationary cutter 20 in limiting cooperation, it can not only resist the twisting tendency of the stationary cutter 20 under the influence of external forces, so that the stationary cutter 20 cannot be twisted, but also guide the moving cutter 10 to reciprocate along the first direction, avoiding the shaking of the moving cutter 10 during shaving.

[0039] In some embodiments, referring to Figure 4 , the connecting portion 21 has a limiting surface 211 facing the third direction. A mating surface 321 is provided on the limiting portion 32. When the stationary cutter 20 has a twisting tendency under the influence of external forces, the limiting surface 211 and the mating surface 321 are in limiting cooperation in the third direction to resist the twisting tendency of the stationary cutter 20 under the influence of external forces. Among them, the first direction, the second direction, and the third direction intersect pairwise, and the intersection means perpendicular or nearly perpendicular. Preferably, the first direction is the length direction of the moving cutter 10, the second direction is the thickness direction of the moving cutter 10, and the third direction is the width direction of the moving cutter 10.

[0040] Further, please refer to Figure 3 and Figure 4 , at least two connecting portions 21 are provided on the stationary cutter 20 at intervals in the first direction; at least two limiting portions 32 are provided on the main body portion 31 at intervals in the first direction; the connecting portion 21 and the limiting portion 32 are in limiting cooperation. In this way, the stationary cutter 20 can be cooperated with the guide rail 30 at multiple positions in the first direction to achieve limiting. The fixation at multiple positions can reduce the deflection of the stationary cutter 20, making the stationary cutter 20 more stable when subjected to external forces and not easily undergoing adverse twisting.

[0041] In one embodiment, please refer to Figures 3 to 5 , the connecting portion 21 is a limiting hole 212, and the limiting portion 32 is a limiting convex block 322; the limiting convex block 322 is embedded in the limiting hole 212 to enable the stationary cutter 20 and the guide rail 30 to achieve limiting cooperation. The limiting hole 212 can be a through hole or a blind hole. The tight cooperation between the limiting convex block 322 and the limiting hole 212 can significantly improve the connection reliability between the stationary cutter 20 and the guide rail 30. Even when subjected to external forces such as vibration and impact, it can maintain a stable connection state, reducing the risk of loosening or falling off of the stationary cutter 20. At the same time, the cooperation between the limiting convex block 322 and the limiting hole 212 can achieve precise positioning, ensuring that the relative position between the stationary cutter 20 and the guide rail 30 is accurate, thereby reducing the assembly error.

[0042] Further, referring to Figure 4 , the two connecting portions 21 are provided at both ends of the stationary cutter 20 along the first direction. Since the two ends of the stationary cutter 20 are more likely to deform, further, please refer to Figure 3, two connecting parts 21 are arranged at both ends of the stationary blade 20 along the first direction, and the limiting parts 32 are arranged corresponding to the positions of the connecting parts 21. In this way, both ends of the stationary blade 20 in the first direction are fixed, thereby restricting the degree of freedom of movement of the stationary blade 20 in space and making it not easily deformed. At the same time, at the positions of the connecting parts 21, the stress is concentrated and dispersed to other parts of the stationary blade 20, so that the stress distribution of the blade is more uniform. Such a uniform stress distribution helps to reduce the deformation of the blade caused by stress concentration.

[0043] The connecting part 21 is a limiting hole. The two limiting holes are opened on the end surface of the stationary blade 20 in the first direction and have openings facing the first direction. The two limiting parts 32 are respectively embedded in the limiting holes. In this way, the hole walls of the limiting holes limit the stationary blade 20 to prevent the stationary blade 20 from being distorted.

[0044] In one embodiment, refer to Figure 3 , the stationary blade 20 includes a stationary blade body 22 and two stationary blade tooth parts 23 that both extend along the first direction. The two stationary blade tooth parts 23 are connected to both sides of the stationary blade body 22 in the third direction, and the connecting part is arranged on the stationary blade body 22. Among them, a plurality of open knife holes arranged along the first direction are provided on the stationary blade tooth part 23, which can capture the beard and guide the beard to the moving blade 10 for trimming. The moving blade 10 includes a moving blade body 63 and two moving blade tooth parts 64 that both extend along the first direction; the moving blade body 63 includes a first connecting plate 65 and two second connecting plates 66. The two second connecting plates 66 are connected to both sides of the first connecting plate 65 in the third direction, and the first connecting plate 65 and the two second connecting plates 66 enclose to form the sliding groove 62; the two moving blade tooth parts 64 are respectively connected to the sides of the second connecting plates 66 close to the stationary blade 20, and the two stationary blade tooth parts 23 are respectively in contact with the two moving blade tooth parts 64 to ensure that the razor can effectively capture and cut hair during the shaving process while protecting the skin from being damaged.

[0045] In one embodiment, please refer to Figure 3, the cutter head assembly 100 further includes a stationary cutter bracket 40 fixedly connected to the stationary cutter 20. The stationary cutter bracket 40 has two side plates 41 that extend along a first direction and are spaced apart from each other along a third direction; the side plates 41 of the stationary cutter bracket 40 are convexly provided with mounting blocks 411 along a second direction; the stationary cutter 20 is respectively provided with mounting holes 213 on both sides of the connecting portion 21 in the third direction; the mounting blocks 411 are embedded in the mounting holes 213. The mounting blocks 411 and the mounting holes 213 can also be limited in the third direction, which is beneficial for the stationary cutter 20 to resist the deformation tendency in the third direction. The mounting holes 213 being adjacent to the connecting portion 21 can make the structure of the stationary cutter 20 compact on the one hand, which is beneficial for the hair cutting device to be miniaturized; on the other hand, the mounting holes 213 and the connecting portion 21 cooperate with the mounting blocks 411 and the limiting portions 32 respectively, which can better disperse the external load and reduce the local stress concentration, thereby reducing the local deformation and distortion of the stationary cutter 20.

[0046] In one embodiment, referring to Figure 2 , the main body portion 31 is placed in the sliding groove 62; a sliding gap 67 is formed between the stationary cutter 20 and the side plate 41. The moving cutter body 63 is placed between the two side plates 41, and the moving cutter teeth portion 64 passes through the sliding gap 67 along the third direction, and the moving cutter teeth portion 64 can reciprocate along the first direction in the sliding gap 67.

[0047] In one embodiment, referring to Figure 8 , the inner side surface of the side plate 41 is provided with bump points 68 in contact with the moving cutter body 63 or convex lines extending along the first direction. In this way, the contact area between the moving cutter 10 and the stationary cutter bracket 40 is reduced, which can effectively reduce the moving resistance during the movement of the moving cutter 10 and reduce the noise.

[0048] In one embodiment, please refer to Figure 1 , Figure 3 and Figure 7 , the cutter head assembly further includes two end caps 50, and the two end caps 50 are respectively fixedly connected to both ends of the stationary cutter bracket 40 in the first direction, and the end caps 50 cover both ends of the stationary cutter in the first direction. The end caps 50 are used to accommodate or decorate the ends of the stationary cutter 20, the stationary cutter bracket 40 and the guide rail 30.

[0049] In some embodiments, the two side plates 41 of the stationary cutter bracket 40 are both provided with fixing portions 42. The fixing portions 42 on the two side plates 41 extend away from each other in the third direction, and each fixing portion 42 has a first fixing surface facing the second direction.

[0050] Referring to Figure 7 , the end cap 50 has a second fixing surface 51 facing the second direction. The first fixing surface and the second fixing surface 51 are in limiting cooperation to fix the stationary cutter bracket 40 and the end cap 50.

[0051] The fixing part 42 can be provided at any position on the side plate 41 away from the static cutter 20 in the second direction, such as the middle position of the side plate 41 in the second direction or the end of the side plate 41 in the second direction.

[0052] In some embodiments, a slot is provided on the side wall of the end cap 50. The slot has an inner wall surface arranged in the second direction, and the fixing part 42 is inserted into the slot. At this time, the inner wall surface of the slot arranged in the second direction is the second fixing surface 51, and the side surface of the fixing part 42 cooperating with the second fixing surface 51 is the first fixing surface 421.

[0053] Further, please refer to Figure 3 , both side plates 41 of the static cutter bracket 40 are partially bent in the third direction to form the fixing part 42; the side surface of the fixing part 42 close to the static cutter 20 in the second direction is the first fixing surface; the end surface of the end cap 50 away from the static cutter 20 in the second direction is the second fixing surface 51. In this way, the static cutter bracket 40 and the end cap 50 are in direct contact with each other and bear the force transmission, thereby making the fixing relationship between the static cutter bracket 40 and the end cap 50 more stable and reducing the problem of unstable results caused by the gap or looseness between the plug-in part and the inserted part. At the same time, in this embodiment, the cooperation between the second fixing surface 51 and the first fixing surface does not require the setting and manufacturing of complex plug-in parts, thus reducing the complexity of processing and installation. In some embodiments, the second fixing surface 51 and the first fixing surface are welded or bonded.

[0054] In some embodiments, an avoidance notch 53 is provided on the end cap 50, and the fixing part 42 is in limit cooperation with the end cap 50 at the avoidance notch 53. In this way, the structure of the cutter head assembly 100 can be made compact, which is more conducive to reducing the volume of the cutter head assembly 100.

[0055] In some embodiments, referring to Figure 3 , the end cap 50 includes an outer cover 54 and a lining 55. The outer cover 54 is used for decoration, accommodating the lining 55, the static cutter bracket 40, the static cutter 20, the guide rail 30 and the end of the moving cutter 10. At the same time, the outer cover 54 is in limit cooperation with the fixing part 42. The lining 55 is provided with an assembly hole for connecting with the main body of the hair cutting device, so as to realize the connection between the blade assembly 100 and the main body of the hair cutting device. Further, the outer cover 54 is made of metal, and the lining 55 is made of plastic. In this way, the outer cover 54 makes the cutter head assembly 100 have strong wear resistance and drop resistance, and the lining 55 can provide additional buffering and protection to prevent the end cap from being damaged due to vibration and collision.

[0056] In some embodiments, the end cap 50 is further provided with a buffer member 60, which plays a buffering role when the end cap 50 collides with the housing of the hair cutting device, so as to avoid the wear of the end cap 50 and the housing of the hair cutting device and the generation of noise.

[0057] In some embodiments, referring to FIGS. 3 to Figure 5 , the main body portion 31 is welded to the stationary blade 20. The main body portion 31 and the stationary blade 20 are welded in the first direction, providing stable support and fixation for the stationary blade 20. Thus, the fixing position of the guide rail 30 and the stationary blade 20 is increased, so that the guide rail 30 can help the stationary blade 20 disperse stress and transfer the stress to a wider area. This can reduce the local stress concentration, thereby reducing the risk of the stationary blade being distorted.

[0058] In some embodiments, please refer to Figure 1 and Figure 3 , the limiting portion is welded to the connecting portion. Welding or bonding the limiting portion to the connecting portion can improve the stability and rigidity of the stationary blade 20, thereby preventing the stationary blade 20 and the guide rail 30 from sliding relative to each other due to loosening during use, which may cause the blade assembly to fail or be damaged. In some embodiments, the limiting surface 211 and the mating surface 321 are fixed by laser welding. Laser welding can be carried out by heating a very small area, thus achieving high-precision welding. At the same time, laser welding generally produces less heat influence, which can reduce deformation and stress concentration, thereby avoiding changes in the stress distribution of the stationary blade 20 after welding, and then preventing it from being easily distorted.

[0059] In some embodiments, please refer to Figure 3 and Figure 4 and Figure 7 , the limiting hole 212 is opened on the end face of the stationary blade 20 in the first direction. Thus, it is convenient for the installer to weld the limiting surface 211 and the mating surface 321 from multiple angles, improving the welding efficiency and welding precision.

[0060] In some embodiments, please refer to Figure 3 and Figure 4 and Figure 7 , the limiting hole 212 penetrates the stationary blade 20 in the second direction. Thus, the limiting hole 212 is a through hole. The through hole facilitates the smooth filling of the welding material into the weld, ensuring that the weld is full and firm. At the same time, the through hole can reduce the stress concentration that may occur in the welding area.

[0061] The present utility model also provides a hair cutting device, which includes a cutter head assembly 100. The specific structure of the cutter head assembly 100 refers to the above embodiments. Since this hair cutting device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cutter head assembly, characterized in that, It includes a moving blade, a stationary blade, and a guide rail that all extend along a first direction; The moving blade can reciprocate relative to the stationary blade along the first direction to achieve shearing; a chute is provided on the side of the moving blade facing the stationary blade; The guide rail includes a main body portion and a limiting portion. The main body portion extends along the first direction, and the limiting portion protrudes from the main body portion in a second direction; the main body portion is fixedly connected to the stationary blade, and the main body portion is placed in the chute. A connecting portion corresponding to the limiting portion is provided on the stationary blade, and the limiting portion and the connecting portion are in limiting cooperation; Wherein, the first direction and the second direction intersect.

2. The cutter head assembly according to claim 1, wherein, At least two of the connecting portions are provided on the stationary blade at intervals in the first direction, and at least two limiting portions are provided on the main body portion at intervals in the first direction, and the connecting portion and the limiting portion are in limiting cooperation.

3. The cutter head assembly according to claim 2, wherein The two connecting portions are provided at both ends of the stationary blade along the first direction, and the connecting portion is a limiting hole; the two limiting holes are opened on the end face of the stationary blade in the first direction and have openings facing the first direction, and the two limiting portions are respectively embedded in the limiting holes.

4. The cutter head assembly according to claim 3, characterized in that, The stationary blade includes a stationary blade main body and two stationary blade tooth portions that all extend along the first direction. The two stationary blade tooth portions are connected to both sides of the stationary blade main body in a third direction, and the connecting portion is provided on the stationary blade main body; The moving blade includes a moving blade main body and two moving blade tooth portions that all extend along the first direction; the moving blade main body includes a first connecting plate and two second connecting plates. The two second connecting plates are respectively connected to both sides of the first connecting plate in the third direction. The first connecting plate and the two second connecting plates enclose to form the chute; the two moving blade tooth portions are respectively connected to the sides of the two second connecting plates close to the stationary blade, and the two stationary blade tooth portions are respectively in contact with the two moving blade tooth portions; The first direction, the second direction, and the third direction intersect pairwise.

5. The cutter head assembly according to claim 4, wherein The tool head assembly further includes a stationary blade bracket fixedly connected to the stationary blade. The stationary blade bracket has two side plates that extend along the first direction and are relatively spaced apart in the third direction; an installation block protrudes from the side plate in the second direction; Installation holes are respectively provided on both sides of the stationary blade in the third direction of the connecting portion; the installation block is embedded in the installation hole.

6. The cutter head assembly according to claim 5, wherein, The main body portion is placed in the chute; a sliding gap is formed between the stationary blade and the side plate. The moving blade main body is placed between the two side plates. The moving blade tooth portion passes through the sliding gap along the third direction, and the moving blade tooth portion can reciprocate along the first direction in the sliding gap.

7. The cutter head assembly according to any one of claims 5 or 6, characterized in that, Convex points or convex lines extending along the first direction that abut against the moving blade main body are provided on the inner side surface of the side plate.

8. The cutter head assembly according to any one of claims 1-6, characterized in that, The tool head assembly further includes two end caps that are respectively fixedly connected to both ends of the stationary blade bracket in the first direction and cover both ends of the stationary blade in the first direction.

9. The cutter head assembly according to any one of claims 1-6, characterized in that, The main body portion is welded to the stationary blade, and / or, the limiting portion is welded to the connecting portion.

10. A hair cutting device, characterized in that, It includes the tool head assembly according to any one of claims 1 to 9.

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