Knife head of hair cutting device and hair cutting device

Abstract

The embodiment of the utility model discloses a tool bit of a hair cutting device and the hair cutting device. The tool bit comprises a cutting assembly, a tool bit shell and a locking mechanism. The tool bit shell is provided with a containing cavity, a dismounting opening and a shearing opening, the locking mechanism is provided with a locking piece which can be movably installed on the tool bit shell. The locking piece has a locking state and an unlocking state; when the locking piece is in a locking state, the shearing assembly is arranged in the containing cavity, the shearing assembly is matched with the locking piece in a limiting mode, and the shearing assembly is exposed out of the shearing opening. When the locking piece is in an unlocking state, the shearing assembly can be separated from the containing cavity from the dismounting opening and / or the shearing opening. The shearing assembly is limited in the containing cavity of the tool bit shell through the locking piece of the locking mechanism, it can be guaranteed that the position of the shearing assembly is stable in the working process, and the poor shearing effect or equipment damage caused by looseness is avoided. Meanwhile, a user can regularly clean, maintain and replace the shearing assembly conveniently, the fault occurrence rate is reduced, and the service life of equipment is prolonged.

Description

Technical Field

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

[0002] During the use of a hair cutting device, for the needs of maintenance or cleaning, people want to disassemble the cutting component of the hair cutting device from the hair cutting device. After the maintenance or cleaning is completed, the cutting component is reinstalled onto the hair cutting device. However, the related art only supports separating the cutting component and the cutter head housing as a whole from the main body of the hair cutting device. The user cannot quickly further disassemble the cutting component and the cutter head housing to complete comprehensive maintenance or cleaning. This brings great inconvenience to the user.

[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 of a hair cutting device, aiming to solve the technical problem that the cutting component and the cutter head housing cannot be disassembled, which brings inconvenience to the use.

[0005] To achieve the above object, the present utility model proposes a cutter head of a hair cutting device. The cutter head of the hair cutting device includes a cutting component, a cutter head housing, and a locking mechanism; the cutter head housing has a cavity and a disassembly and assembly port and a cutting port that are communicated with the cavity and are oppositely arranged;

[0006] The locking mechanism has a locking member that is movably installed on the cutter head housing; the locking member has a locking state and an unlocking state; when the locking member is in the locking state, the cutting component is placed in the cavity, the cutting component is in limit fit with the locking member, and the cutting component is exposed outside the cutting port; when the locking member is in the unlocking state, the cutting component can be separated from the cavity through the disassembly and assembly port and / or the cutting port.

[0007] In one embodiment, an assembly groove is provided on the inner wall surface of the cavity; the locking member includes a main body portion and a locking protrusion connected to the main body portion; the cutting component is provided with a locking groove, and the main body portion can slide in the assembly groove;

[0008] When the locking protrusion is embedded in the locking groove, the locking member is in the locking state; when the locking protrusion is separated from the locking groove, the locking member is in the unlocking state.

[0009] In one embodiment, the locking mechanism further includes a reset member disposed in the assembly groove. One end of the reset member abuts against the bottom wall of the assembly groove, and the other end of the reset member abuts against the inner end face of the main body portion.

[0010] In one embodiment, the locking member includes a pressing portion connected to the main body portion; the pressing portion is exposed outside the assembly groove and is located on the side of the shearing component facing the disassembly and assembly opening.

[0011] In one embodiment, a guiding protrusion protrudes from the bottom wall surface of the assembly groove, and a guiding groove is provided on the pressing portion. The guiding protrusion and the guiding groove are in limiting cooperation.

[0012] In one embodiment, the cutter head housing includes a main body housing and a lining cover. The disassembly and assembly opening and the cutting opening are both formed in the main body housing, and the inner wall surface of the cavity is formed on the main body housing and the lining cover;

[0013] The lining cover is fixedly connected to the main body housing and covers the assembly groove, and the lining cover is provided with a locking hole communicated with the assembly groove;

[0014] In the locked state, the locking protrusion protrudes from the locking hole and is embedded in the locking groove.

[0015] In one embodiment, the lining cover includes a main body cover and a lug; the locking hole is provided on the main body cover; the lug protrudes from the side surface of the main body cover facing the center of the disassembly and assembly opening; a shoulder is provided on the inner wall surface of the main body housing, and the lug is fixedly connected to the shoulder.

[0016] In one embodiment, a limiting groove is formed on the side wall surface of the shoulder facing the disassembly and assembly opening, and the limiting groove is used to prevent the shearing component from disengaging from the disassembly and assembly opening;

[0017] In one embodiment, the shearing component includes a tool holder and a cutter head module, and the cutter head module is floatingly disposed in the tool holder;

[0018] The inner wall surface of the cavity is provided with a first limiting surface facing the disassembly and assembly opening; the locking protrusion has a second limiting surface facing the cutting opening; the locking groove is formed on the surface of the tool holder facing the assembly groove;

[0019] In the locked state, the first limiting surface abuts against the side surface of the tool holder facing the cutting opening, and the second limiting surface abuts against the inner wall surface of the locking groove facing the disassembly and assembly opening.

[0020] In one embodiment, a limiting groove is formed on a side wall of the boss facing the assembly and disassembly opening, and the cutter head module is provided with a limiting protrusion, which can abut against the groove wall of the limiting groove facing the assembly and disassembly opening to prevent the cutter head module from falling out of the assembly and disassembly opening.

[0021] The side wall surface of the lug facing the shearing opening is in contact with the side surface of the shoulder facing the disassembly opening; a avoiding groove is provided on the lug, and the avoiding groove is arranged corresponding to the limiting groove.

[0022] In one embodiment, the knife seat has a first avoidance groove arranged toward the shearing opening, and the lug is located in the first avoidance groove.

[0023] In one embodiment, the side surface of the lug facing the disassembly opening abuts against the wall surface of the first avoidance groove facing the shear opening.

[0024] In one embodiment, the tool holder includes a plate body and a boss connected to each other; the boss is arranged on the side of the plate body facing away from the shear cut, the locking groove is opened on the boss, and the tool head module can be floated on the side of the plate body facing the shear cut.

[0025] In one embodiment, the surface of the knife seat facing the shear cut is the first surface, the surface of the boss facing the locking mechanism is the second surface, and a first inclined surface is provided at the connection between the first surface and the second surface.

[0026] In one embodiment, the first surface is formed on a plate surface of the plate body facing the shear cut, and the second surface is formed on the plate body and the boss.

[0027] In one embodiment, the side of the locking protrusion facing the disassembly opening is a third surface, and a second inclined surface is provided at the connection between the third surface and the second limiting surface.

[0028] The present invention further provides a hair cutting device, comprising a main body and a cutter head. The cutter head is the cutter head of the hair cutting device described in any one of the above embodiments, and the cutter head is detachably connected to the main body.

[0029] The present utility model provides a cutter head for a hair cutting device, which includes a cutting component, a cutter head housing, and a locking mechanism; the cutter head housing has a cavity, as well as a disassembly and assembly port and a cutting port that are communicated with the cavity and arranged oppositely; the locking mechanism has a locking member that is movably installed in the cutter head housing; the locking member has a locking state and an unlocking state; when the locking member is in the locking state, the cutting component is placed in the cavity, the cutting component is in limit cooperation with the locking member, and the cutting component is exposed outside the cutting port; when the locking member is in the unlocking state, the cutting component can be detached from the cavity through the disassembly and assembly port and / or the cutting port. By using the locking member of the locking mechanism to limit the cutting component in the cavity of the cutter head housing, the present utility model can ensure the stable position of the cutting component during operation, avoiding poor cutting effects or equipment damage caused by loosening. At the same time, the locking member can be switched between the locking state and the unlocking state, enabling the cutting component to be disassembled and assembled in a simple manner, facilitating the user to regularly clean, maintain, and replace the cutting component, reducing the failure rate, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 FIG. shows a schematic structural diagram of an embodiment of the hair cutting device of the present utility model;

[0032] Figure 2 is Figure 1 an exploded view of the hair cutting device in;

[0033] Figure 3 is Figure 2 a schematic structural diagram of the cutter head of the hair cutting device in;

[0034] Figure 4 is Figure 2 an exploded view of the cutter head of the hair cutting device in;

[0035] Figure 5 is Figure 4 an enlarged view of part A in;

[0036] Figure 6 is Figure 4 an enlarged view of part B in;

[0037] Figure 7 is Figure 4 an exploded view of the cutter head housing and the locking member in;

[0038] Figure 8 is Figure 4Top view of the cutter head of the hair cutting device;

[0039] Figure 9 is Figure 8 Cross-sectional view along line IX-IX;

[0040] Figure 10 is Figure 9 Enlarged view at C in [the figure];

[0041] Figure 11 is Figure 8 Cross-sectional view along line XI-XI;

[0042] Figure 12 is Figure 11 Enlarged view at D in [the figure].

[0043] Explanation of the reference numerals in the attached drawings:

[0044]

[0045]

[0046] The realization of the purpose, 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

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying 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 of 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 that those of ordinary skill in the art can implement it. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of the technical solutions does not exist and is not within the protection scope required by the present utility model.

[0048] 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, the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. 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 solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0050] The present utility model provides a cutter head for a hair shearing device. A hair shearing device refers to a tool or equipment used for trimming or shearing hair. Such devices can include manual tools and electric devices and are commonly used in the fields of personal care, beauty, hair styling, etc. The cutter head of a hair shearing device refers to the component that directly contacts the hair and shears or trims the hair.

[0051] In the embodiments of the present utility model, please refer to Figures 1 to 3 , the cutter head 100 of the hair shearing device 300 includes a shearing component 30, a cutter head housing 10, and a locking mechanism 20.

[0052] Among them, the cutter head housing 10 refers to the outer shell part that covers the shearing component 30 and other internal structures and is usually made of plastic or metal materials. The cutter head housing 10 has a cavity 11, and a disassembly and assembly opening 12 and a cutting opening 13 that communicate with the cavity 11 and are oppositely arranged. The cavity 11 is the space inside the cutter head housing 10 for accommodating the shearing component 30, the locking mechanism 20, and other internal structures. The disassembly and assembly opening 12 is an opening on the cutter head housing 10 for facilitating the user to disassemble or replace the cutter head or blade from this opening. The cutting opening 13 refers to the opening on the cutter head housing 10 corresponding to the shearing component 30, so that the shearing component 30 can be exposed outside the cutter head housing 10 to facilitate the shearing component 30 to trim the hair.

[0053] The locking mechanism 20 is a device that fixes the shearing component 30 on the cutter head housing 10. Common locking mechanisms 20 include button-type buckles, rotary locking devices, and sliding locking devices. The locking mechanism 20 has a locking member 21 that is movably installed on the cutter head housing 10. The locking member 21 has the functions of fixed installation and easy operation. Specifically, it ensures that the cutter head 100 will not loosen or fall off during use and allows the user to release the fixed relationship between the cutter head housing 10 and the shearing component 30 when needed, so that the shearing component 30 can be disassembled from the cutter head housing 10, thus facilitating the user to replace or clean the blade.

[0054] The cutting component 30 is the part that actually cuts the hair. It realizes the function of cutting hair through relative movement and usually includes a fixed blade and a movable blade. The locking member 21 has a locked state and an unlocked state. When the locking member 21 is in the locked state, the cutting component 30 is placed in the cavity 11, the cutting component 30 is in limit fit with the locking member 21, and the cutting component 30 is exposed outside the cutting opening 13. In this way, it is ensured that the cutting component 30 can be accurately positioned during installation and remains stable during use. When the locking member 21 is in the unlocked state, the cutting component 30 can be detached from the cavity 11 through the disassembly and installation opening 12 and / or the cutting opening 13. Through the disassembly and installation opening 12 and the cutting opening 13, it is ensured that no damage or accidental loss will be caused to the cutting component 30 or other components of the cutter head housing 10 during the disassembly process. This helps to extend the service life of the hair cutting device 300 and reduce the maintenance cost.

[0055] The present utility model provides a cutter head 100 of a hair cutting device 300, which includes a cutting component 30, a cutter head housing 10, and a locking mechanism 20; the cutter head housing 10 has a cavity 11 and a disassembly and installation opening 12 and a cutting opening 13 that are communicated with the cavity 11 and are oppositely arranged; the locking mechanism 20 has a locking member 21 that is movably installed on the cutter head housing 10; the locking member 21 has a locked state and an unlocked state; when the locking member 21 is in the locked state, the cutting component 30 is placed in the cavity 11, the cutting component 30 is in limit fit with the locking member 21, and the cutting component 30 is exposed outside the cutting opening 13; when the locking member 21 is in the unlocked state, the cutting component 30 can be detached from the cavity 11 through the disassembly and installation opening 12 and / or the cutting opening 13. By the locking member 21 of the locking mechanism 20, the cutting component 30 is limited in the cavity 11 of the cutter head housing 10, which can ensure the stable position of the cutting component 30 during operation and avoid poor cutting effects or equipment damage caused by loosening. At the same time, the locking member 21 can be switched between the locked state and the unlocked state, enabling the cutting component 30 to be disassembled and assembled in a simple manner, facilitating the user to regularly clean, maintain, and replace the cutting component 30, reducing the failure rate, and extending the service life of the equipment.

[0056] Further, referring to Figures 4 to 7, an assembly groove 112 is provided on the inner wall surface of the cavity 11. The assembly groove 112 helps the cutter head 100 of the hair cutting device 300 to be miniaturized and lightweight. Specifically, the assembly groove 112 can reduce the need for additional components for abutting the locking member 21. By reducing unnecessary components, the assembly groove 112 helps to optimize the spatial layout within the cutter head housing 10 and reduce the weight of the cutter head housing 10. The locking member 21 includes a main body 213 and a locking protrusion 214 connected to the main body 213; the shearing assembly 30 is provided with a locking groove 312, and the main body 213 is slidable in the assembly groove 112. The assembly groove 112 defines the sliding path of the main body 213, providing good guidance and stability for the sliding of the main body 213. When the locking protrusion 214 engages with the locking groove 312, the locking member 21 is in the locked state; when the locking protrusion 214 disengages from the locking groove 312, the locking member 21 is in the unlocked state. This sliding unlocking mechanism simplifies the operation process, allowing users to complete the disassembly and assembly of the shear assembly 30 without complicated tools or unnecessary steps.

[0057] Further, refer to Figure 10 , the locking mechanism 20 also includes a reset member 22 provided in the assembly groove 112. The reset member 22 includes but is not limited to a spring, a spring sheet, and a rubber gasket. One end of the reset member 22 abuts against the bottom wall of the assembly groove 112, and the other end of the reset member 22 abuts against the inner end surface of the main body 213. In the locked state, the reset member 22 can ensure that the position of the locking member 21 remains fixed, thereby preventing the shearing assembly 30 from detaching from the cutter head shell 10 from the disassembly port 12. When switching from the unlocked state to the locked state, when the external force disappears, the reset member 22 can push the locking member 21 back to the initial position, achieving automatic reset, thereby improving operational convenience and reliability. In some embodiments, the reset member 22 is a spring. The spring has good elasticity and durability and can provide a large reset force. Even under long-term use or frequent operation, the locking mechanism 20 can maintain its functionality and reliability. At the same time, the spring provides feedback and resistance during the sliding process to prevent it from being too loose or sliding too fast.

[0058] In one embodiment, referring to Figures 7 to 10, the locking member 21 includes a pressing portion 212 connected to the main body portion 213. The pressing portion 212 is for the user to press to control the locking member 21. The pressing portion 212 is exposed outside the assembly groove 112 and is located on the side of the shearing assembly 30 facing the disassembly and assembly opening 12. This facilitates the user to directly control the locking member 21 at the disassembly and assembly opening 12 through pressing operations, without the need for complex tools or additional steps, improving the convenience of operation. The side surface of the locking protrusion 214 facing the shearing opening 13 is slidably abutted against the side wall of the assembly groove 112; in the locked state, the side surface of the locking protrusion 214 facing the shearing opening 13 abuts against the inner wall surface of the locking groove 312.

[0059] Furthermore, a guiding protrusion 1121 is protruded from the bottom wall surface of the assembly groove 112, and the pressing portion 212 is provided with a guiding groove 2121, and the guiding protrusion 1121 and the guiding groove 2121 are in limit fit. The limit fit of the guiding protrusion 1121 and the guiding groove 2121 provides a movement path for the pressing portion 212. Specifically, the surface of the guiding protrusion 1121 provides a path for the movement of the guiding groove 2121, so that the pressing portion 212 is not easily displaced from its original position during use. The limit fit of the guiding protrusion 1121 and the guiding groove 2121 also enhances the stability and durability of the pressing portion 212 in the assembly system. Specifically, the pressing portion 212 is the directly stressed component during pressing. When the applied force is too large, the pressing portion 212 is prone to deformation. In this embodiment, the limit fit of the guiding protrusion 1121 and the guiding groove 2121 can prevent the pressing portion 212 from bending towards the main body portion 213.

[0060] In one embodiment, referring to Figures 4 to 5 , Figures 9 to 10 , the cutter head housing 10 includes a main body housing 14 and a lining cover 17. The main body housing 14 is the main outer housing part of the cutter head housing 10, forming the basic structural framework of the cutter head housing 10 and providing external structural support for the cutter head housing 10. The disassembly and assembly opening 12 and the shearing opening 13 are both formed in the main body housing 14, and the inner wall surface of the cavity 11 is formed on the main body housing 14 and the lining cover 17. The lining cover 17 is fixedly connected to the main body housing 14 and covers the assembly groove 112, and the lining cover 17 is provided with a locking hole 171 communicating with the assembly groove 112; in the locked state, the locking protrusion 214 protrudes from the locking hole 171 and is embedded in the locking groove 312. The assembly groove 112 and the locking hole 171 enable the locking member 21 to switch between the locked state and the unlocked state.

[0061] Furthermore, referring together to Figure 7, the inner lining cover 17 includes a main body cover 172 and a lug 173. The main body cover 172 performs the connection function in the inner lining cover 17. The lock hole 171 is provided on the main body cover 172, enabling the locking member 21 to switch between the locked state and the unlocked state. The lug 173 protrudes from the side surface of the main body cover 172 facing the center of the disassembly and assembly opening 12; a shoulder 142 is provided on the inner wall surface of the main body shell 14, and the lug 173 is fixedly connected to the shoulder 142. The shoulder 142 is the support point and positioning reference for fixing the lug 173, ensuring that the inner lining cover 17 can be firmly fixed inside the main body shell 14 after assembly and will not loosen due to vibration or use.

[0062] Furthermore, the side wall surface of the lug 173 facing the cutting notch 13 is in contact with the side surface of the shoulder 142 facing the disassembly and assembly opening 12. The close contact between the lug 173 and the shoulder 142 ensures the stability of the inner lining cover 17 during assembly. At the same time, due to the close cooperation between the lug 173 and the shoulder 142, the inner lining cover 17 can effectively resist the impact of the elastic restoring force of the reset member 22 after installation. This anti-vibration ability can ensure that the inner lining cover 17 will not cause the movement or damage of each component due to vibration during operation, enhancing the reliability and stability of the inner lining cover 17.

[0063] In one embodiment, referring to Figure 9 and Figure 10 , the shearing assembly 30 includes a tool holder 31 and a tool head module 32, and the tool head module 32 is floatingly arranged on the tool holder 31. The tool holder 31 is the basic support structure of the entire shearing assembly 30, providing a stable base for installing the static tool head 100 module. At the same time, the tool holder 31 also performs the limiting function of the shearing assembly 30.

[0064] The inner wall surface of the cavity 11 has a first limiting surface 111 facing the disassembly and assembly opening 12; the locking protrusion 2l4 has a second limiting surface 211 facing the cutting notch 13; a locking groove 312 is formed on the surface of the tool holder 31 facing the assembly groove 112; in the locked state, the first limiting surface 111 abuts against the side surface of the tool holder 31 facing the cutting notch 13, preventing the shearing assembly 30 from detaching from the main body shell 14 at the cutting notch 13 when the locking member 21 is in the locked state. The second limiting surface 211 abuts against the inner wall surface of the locking groove 312 facing the disassembly and assembly opening 12 to prevent the shearing assembly 30 from detaching from the tool head shell 10 at the disassembly and assembly opening 12 when the locking member 21 is in the locked state.

[0065] Furthermore, referring to Figure 7, a limiting groove 1421 is formed on the side wall surface of the shoulder 142 facing the disassembly and assembly opening 12. The cutter head module 32 is provided with a limiting protrusion 321, and the limiting protrusion 321 can abut against the groove wall surface of the limiting groove 1421 facing the disassembly and assembly opening 12 to prevent the cutter head module 32 from disengaging from the disassembly and assembly opening 12; the side wall surface of the lug 173 facing the cutting opening 13 is fitted to the side surface of the shoulder 142 facing the disassembly and assembly opening 12; a clearance groove 1731 is formed on the lug 173, and the clearance groove 1731 is arranged corresponding to the limiting groove 1421. The groove wall surface of the limiting groove 1421 facing the disassembly and assembly opening 12 is in limiting cooperation with the limiting protrusion 321 on the cutter head module 32 to prevent the cutter head module 32 from detaching from the main body case 14 when floating. The clearance groove 1731 provides clearance for the limiting protrusion 321 on the cutter head module 32, ensuring smooth installation and disassembly of the cutting assembly 30 from the disassembly and assembly opening 12.

[0066] Further, referring to Figure 4 and Figure 6 , the tool holder 31 has a first avoidance groove 311 facing the cutting opening 13, and the lug 173 is located in the first clearance groove 1731. The first avoidance groove 311 provides an embedding space for the lug 173, enabling the lug 173 to be accurately positioned on the tool holder 31, improving the fitting tightness between the two. At the same time, the limited space can be effectively utilized, avoiding increasing the overall structure size to accommodate the lug 173, which is beneficial to the miniaturization of the cutter head 100.

[0067] Further, referring to Figure 3 , Figure 5 , Figure 11 and Figure 12 , the side surface of the lug 173 facing the disassembly and assembly opening 12 abuts against the groove wall surface of the first avoidance groove 311 facing the cutting opening 13. The side surface of the lug 173 directly abuts against the groove wall surface of the first avoidance groove 311, thus forming an additional support surface. By increasing the contact area and abutting points, the stability and anti-vibration ability of the entire structure are effectively improved, ensuring more reliable operation of the structure. At the same time, due to the abutting relationship between the side surface of the lug 173 and the groove wall of the first avoidance groove 311, not only the freedom degree of the lug 173 in the plane is restricted, but also its movement in the vertical direction is inhibited, improving the positioning accuracy and ensuring the alignment after the two are assembled.

[0068] Further, fixing holes 1422 are provided on the shoulder 142, through holes 1732 are provided on the lug 173, and the cutter head 100 of the hair cutting device 300 further includes a fastener 70. The fastener 70 includes but is not limited to screws, bolts, and rivets. The fastener 70 passes through the through hole 1732 and is fixedly connected to the fixing hole 1422. Connecting the lug 173 and the shoulder 142 through the fastener 70 can ensure a firm combination between the inner lining cover 17 and the cutter head housing 10, reduce the risk of looseness between the inner lining cover 17 and the cutter head housing 10, and improve the structural stability of the cutter head housing 10.

[0069] In some embodiments, referring to Figure 6 , a second avoidance groove 3111 is provided on the groove wall surface of the first avoidance groove 311 facing the cutting opening  13; one end of the fastener 70 close to the disassembly and assembly opening 12 is located in the second avoidance groove 3111. The first avoidance groove 311 and the second avoidance groove 3111 can make full use of the limited space, which helps the cutter head 100 of the hair cutting device 300 to be miniaturized. At the same time, it plays a role in beautifying the appearance of the product.

[0070] In one embodiment, the tool holder 31 includes a plate body 313 and a boss 314 connected to each other. The plate body 313 is a platform for supporting the stationary cutter assembly and the moving cutter assembly. The plate body 313 is adjacent to the disassembly and assembly opening 12 and the plate surface of the plate body 3l is facing the cutting opening 13. The boss 314 is provided on a surface of the plate body 313 facing away from the cutting opening 13, and the locking groove 312 is opened on the boss 314. This can improve the overall functional concentration of the tool holder 31 without sacrificing the overall structural strength of the tool holder 31. The cutter head module 32 can be floatingly arranged on one side of the plate body 313 facing the cutting opening 13.

[0071] In some embodiments, the first avoidance groove 311 and the second avoidance groove 3111 are opened on the plate body 313 or at the connection between the plate body 313 and the boss 314, further improving the overall functional concentration of the tool holder 31.

[0072] In some embodiments, referring to Figures 7 to 10 , a sunk groove 143 is provided on the inner wall surface of the main body shell 14, and the inner lining cover 17 is embedded in the sunk groove 143. The sunk groove 143 provides a space for placing and fixing the inner lining cover 17, which can effectively prevent it from moving. At the same time, the sunk groove 143 can ensure the correct installation and fixation of the inner lining cover 17, avoiding failures or damages caused by improper installation. An assembly groove 112 is opened on the bottom wall surface of the sunk groove 143. Looking at the inside of the cutter head 100 of the hair cutting device 300 from the disassembly and assembly opening 12, the reset member 22 in the assembly groove 112 is blocked by the inner lining cover 17, thereby improving the aesthetic degree of the cutter head 100 of the hair cutting device 300.

[0073] Further, the surface of the inner lining cover 17 facing the center of the disassembly and assembly opening 12 is lower than the surface of the main body shell 14 facing the center of the disassembly and assembly opening 12, or is flush with the surface of the main body shell 14 facing the center of the disassembly and assembly opening 12. Thus, it can effectively prevent it from colliding and rubbing against the shearing device during the disassembly and assembly of the shearing component 30, thereby prolonging the service life of the inner lining cover 17.

[0074] Further, referring to Figures 9 to 10 , the surface of the tool holder 31 facing the cutting opening 13 is the first surface, the surface of the boss 314 facing the locking mechanism 20 is the second surface, and a first inclined surface 317 is provided at the connection between the first surface and the second surface. A larger contact area may cause jamming due to uneven surfaces or wear. In this embodiment, the first inclined surface 317 means that the contact area between the tool holder 31 and the tool head shell 10 is reduced, thereby reducing the risk of jamming during the disassembly and assembly of the tool holder 31, making the disassembly / installation process smoother, and thus improving the assembly efficiency. On the other hand, the reduction in the contact area between the tool holder 31 and the tool head shell 10 also reduces the frictional force between the two contact surfaces, thereby significantly reducing the force required for disassembly, making the sliding between the tool holder 31 and the tool head shell 10 smoother, and the disassembly and assembly process easier and faster.

[0075] Further, the first surface is formed on the plate surface of the plate body 313 facing the cutting opening 13, and the second surface is formed on the plate body 313 and the boss 314. Thus, the length of the first inclined surface 317 is longer, and the contact area between the tool holder 31 and the tool head shell 10 is further reduced, which can further reduce the risk of jamming during the disassembly and assembly process, making the sliding between the tool holder 31 and the tool head shell 10 smoother, and the disassembly and assembly process easier and faster.

[0076] In an embodiment, the side surface of the locking projection 214 facing the disassembly and assembly opening 12 is the third surface, and a second inclined surface 215 is provided at the connection between the third surface and the second limiting surface 211. A larger contact area may cause jamming due to uneven surfaces or wear. In this embodiment, the second inclined surface 215 reduces the contact area between the locking member 21 and the groove, thereby reducing the risk of jamming of the tool holder 31 during the disassembly and assembly process, making the disassembly / installation process smoother, and thus improving the assembly efficiency.

[0077] Further, in some embodiments, referring to Figure 3 and Figure 6, the outer end surface of the convex platform 314 facing away from the plate body 313 is the fourth surface 3141, and the inner wall surface of the locking groove 312 deviates from the fourth surface 3141 in the direction close to the shearing opening 13. In this way, the second inclined surface 215 is hidden in the locking groove 312. When the user observes the inside of the cutter head 100 from the disassembly and assembly opening 12, the user cannot observe the second inclined surface 215. This improves the aesthetics of the inside of the cutter head 100.

[0078] Referring to Figure 1 and Figure 2 , the present utility model further proposes a hair cutting device 300, which includes a main body 200 and a cutter head 100. The specific structure of the cutter head 100 refers to the structure of the cutter head 100 of the hair cutting device 300 in the above-mentioned embodiment, and the cutter head 100 is detachably connected to the main body 200. Since the hair cutting device 300 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

Claims

1. A hair cutting device head, characterized in that: It includes a shearing assembly, a cutter head housing, and a locking mechanism; The cutter head housing has a cavity and a disassembly opening and a shear opening that are connected to and opposite to the cavity; The locking mechanism has a locking part that can be movably mounted on the cutter head shell; the locking part has a locked state and an unlocked state; when the locking part is in the locked state, the shearing assembly is placed in the cavity, the shearing assembly is limitedly engaged with the locking part, and the shearing assembly is exposed at the shearing opening; when the locking part is in the unlocked state, the shearing assembly can be detached from the cavity from the disassembly opening and / or the shearing opening.

2. The cutter head of the hair cutting device according to claim 1, wherein: An assembly groove is provided on the inner wall surface of the cavity; the locking member includes a main body and a locking protrusion connected to the main body; the shearing assembly is provided with a locking groove, and the main body is slidable in the assembly groove; When the locking protrusion is embedded in the locking groove, the locking member is in the locked state; when the locking protrusion is disengaged from the locking groove, the locking member is in the unlocked state.

3. The cutter head of the hair cutting device according to claim 2, wherein: The locking mechanism further includes a reset member provided in the assembly groove, one end of the reset member abuts against the bottom wall of the assembly groove, and the other end of the reset member abuts against the inner end surface of the main body.

4. The cutter head of the hair cutting device according to claim 2 or 3, characterized in that: The locking member includes a pressing portion connected to the main body; the pressing portion is exposed in the assembly groove and is located on a side of the shearing component facing the disassembly opening.

5. The cutter head of the hair cutting device according to claim 4, characterized in that: A guide protrusion is convexly provided on the bottom wall surface of the assembly groove, and a guide groove is provided on the pressing portion. The guide protrusion and the guide groove are limitedly matched.

6. The cutter head of the hair cutting device according to claim 2, wherein: The cutter head housing includes a main body housing and an inner lining cover, the disassembly opening and the shear opening are both provided on the main body housing, and the inner wall surface of the cavity is formed on the main body housing and the inner lining cover; The inner lining cover is fixedly connected to the main body shell and covers the assembly slot, and the inner lining cover is provided with a lock hole communicating with the assembly slot; In the locked state, the locking protrusion is exposed from the locking hole and embedded in the locking groove.

7. The cutter head of the hair cutting device according to claim 6, characterized in that: The lining cover includes a main body cover and a lug; the main body cover is provided with the lock hole; the lug protrudes from the side of the main body cover facing the center of the disassembly and assembly port; the inner wall surface of the main body shell is provided with a shoulder, and the lug is fixedly connected to the shoulder.

8. The cutter head of the hair cutting device according to claim 7, wherein: The shearing assembly includes a knife seat and a knife head module, and the knife head module can be floated on the knife seat; The inner wall surface of the cavity is provided with a first limiting surface facing the disassembly opening; the locking protrusion has a second limiting surface facing the shearing opening; the locking groove is provided on the surface of the knife seat facing the assembly groove; In the locked state, the first limiting surface abuts against the side surface of the knife seat facing the shearing opening, and the second limiting surface abuts against the inner wall surface of the locking groove facing the disassembly opening.

9. The cutter head of the hair cutting device according to claim 8, characterized in that: A limiting groove is formed on the side wall of the boss facing the disassembly opening, and the cutter head module is provided with a limiting protrusion, which can abut against the groove wall of the limiting groove facing the disassembly opening to prevent the cutter head module from falling out of the disassembly opening; The side wall surface of the lug facing the shearing opening is in contact with the side surface of the shoulder facing the disassembly opening; a avoiding groove is provided on the lug, and the avoiding groove is arranged corresponding to the limiting groove.

10. The cutter head of the hair cutting device according to claim 8, wherein: The knife seat has a first avoidance groove arranged toward the shearing opening, and the lug is located in the first avoidance groove.

11. The cutter head of the hair cutting device according to claim 10, wherein: The side surface of the lug facing the disassembly opening abuts against the groove wall surface of the first avoidance groove facing the shearing opening.

12. The cutter head of the hair cutting device according to claim 8, wherein: The tool holder includes a plate body and a boss connected to each other; the boss is arranged on the side of the plate body facing away from the shear cut, the locking groove is opened on the boss, and the tool head module can be floated on the side of the plate body facing the shear cut.

13. The cutter head of the hair cutting device according to claim 12, wherein: The surface of the knife seat facing the shear cut is the first surface, the surface of the boss facing the locking mechanism is the second surface, and a first inclined surface is provided at the connection between the first surface and the second surface.

14. The cutter head of the hair cutting device according to claim 13, wherein: The first surface is formed on a plate surface of the plate body facing the shear cut, and the second surface is formed on the plate body and the boss.

15. The cutter head of the hair cutting device according to claim 12, wherein: The side of the locking protrusion facing the disassembly and assembly port is a third surface, and a second inclined surface is provided at the connection between the third surface and the second limiting surface.

16. A hair cutting device, characterized in that: The device comprises a main unit and a cutter head, wherein the cutter head is the cutter head of the hair cutting device according to any one of claims 1 to 15, and the cutter head is detachably connected to the main unit.

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