Tool bit module, tool bit device and hair trimmer

Abstract

The utility model relates to a tool bit module, a tool bit device and a hair trimmer. The tool bit module comprises a static cutter assembly and a movable cutter assembly, the static cutter assembly comprises a static cutter and a static cutter frame, the static cutter frame comprises two frame bodies arranged in the first direction, the two frame bodies are fixed to the two opposite ends of the static cutter respectively, and the static cutter and the frame bodies form a mounting space; the movable cutter assembly is arranged in the mounting space; the movable cutter assembly comprises a movable cutter frame and a movable cutter fixed to the movable cutter frame, the movable cutter comprises an arc-shaped shearing part and two first fixing parts, the two first fixing parts are connected with the two opposite ends of the arc-shaped shearing part, and the two first fixing parts are located on the two opposite sides of the movable cutter frame and connected with the movable cutter frame correspondingly; the outer side face of the arc-shaped shearing part is attached to the inner side face of the static cutter. The movable cutter assembly can reciprocate in the second direction relative to the static cutter assembly. In the first direction, the distance L1 between the inner side face of the installation space and the first fixing part is larger than or equal to 0.1 mm and smaller than or equal to 1 mm. The tool bit module can avoid interference between the movable cutter assembly and the static cutter assembly.

Description

Technical Field

[0001] This application relates to the field of hair trimming technology, specifically to a blade module, a blade device, and a hair trimmer. Background Technology

[0002] Common hair trimmers consist of two blades, a moving blade and a stationary blade, that fit together. A drive mechanism moves the moving blade back and forth relative to the stationary blade to cut and trim the hair. If the movement space between the moving and stationary blades is too limited, they may interfere with each other, affecting the cutting effect and resulting in poor performance. Conversely, if the movement space is too large, it reduces the space utilization of the hair trimmer and hinders its miniaturization. Utility Model Content

[0003] In view of this, this application provides a blade module, a blade device, and a hair trimmer. The blade module can avoid interference between the moving blade assembly and the stationary blade assembly, and has better performance.

[0004] This application provides a cutter head module, comprising: a stationary cutter assembly and a moving cutter assembly. The stationary cutter assembly includes a stationary cutter and a stationary cutter holder. The stationary cutter holder includes two frames spaced apart along a first direction, which are respectively fixed to opposite ends of the stationary cutter. The stationary cutter and the two frames form an installation space. The moving cutter assembly is disposed within the installation space of the stationary cutter assembly. The moving cutter assembly includes a moving cutter holder and a moving cutter fixed to the moving cutter holder. The moving cutter includes an arc-shaped shearing portion and two first fixing portions. The two first fixing portions connect to opposite ends of the arc-shaped shearing portion and are located on opposite sides of the moving cutter holder and respectively connected to the moving cutter holder. The outer surface of the arc-shaped shearing portion is fitted against the inner surface of the stationary cutter. The moving cutter assembly is used to cooperate with the stationary cutter assembly and can reciprocate relative to the stationary cutter assembly along a second direction. The first direction intersects the second direction. Along the first direction, the distance L1 between the inner surface of the installation space and the first fixing portion satisfies the range: 0.1mm ≤ L1 ≤ 1mm.

[0005] Furthermore, the moving blade also includes two transition sections, each of which is located between the arc-shaped shearing section and one of the first fixing sections. Along the first direction, the distance between the opposite ends of the two arc-shaped shearing sections is greater than the distance between the two first fixing sections.

[0006] Furthermore, the moving blade satisfies at least one of the following conditions: the distance L2 between the outer side of the first fixing part and the outermost end point of the moving blade satisfies the range: 0.4mm≤L2≤0.8mm; the distance L3 between the two first fixing parts satisfies the range: 3.5mm≤L3≤5.5mm.

[0007] Furthermore, the moving tool holder includes a body portion and at least two support portions. The body portion has a first side and a second side disposed opposite to each other. At least one of the support portions is disposed on the first side and extends along the second direction, and at least one of the support portions is disposed on the second side and extends along the second direction. The plurality of support portions are used to support the first fixing portion of the moving tool.

[0008] Furthermore, the movable tool holder also includes a protrusion that protrudes from the surface of the support portion. The surface of the protrusion facing away from the support portion is closer to the frame than the surface of the first fixing portion facing away from the body portion.

[0009] Furthermore, the surface of the protrusion facing away from the support is an arc surface.

[0010] Furthermore, the moving tool holder also includes a welding column disposed on the body portion, with both ends of the welding column protruding from the body portion; the first fixing portion includes a connected fixing sub-part and a welding sub-part, the welding sub-part being used for welding with the welding column; the first fixing portion has a notch, the notch being disposed on at least one side of the welding sub-part.

[0011] Furthermore, the main body has a mounting hole for inserting the transmission rod of the motor module; the main body also has multiple weight-reduction spaces, which are respectively spaced apart on both sides of the mounting hole.

[0012] Furthermore, the stationary blade includes an arc-shaped mesh portion and two second fixing portions. The arc-shaped mesh portion has multiple mesh holes, and the two second fixing portions are respectively connected to the opposite ends of the arc-shaped mesh portion. The inner side of the arc-shaped mesh portion is fitted to the outer side of the moving blade. The frame includes a first clamping member and a second clamping member. The first clamping member and the second clamping member are respectively disposed on opposite sides of the second fixing portion to clamp the second fixing portion.

[0013] Furthermore, the first clamping member, the second fixing part, and the second clamping member all have corresponding positioning holes, which are used to be positioned on the positioning tool.

[0014] Furthermore, the cutter head module also includes two decorative covers, which are respectively disposed on opposite sides of the stationary cutter assembly along the second direction; the first clamping member is closer to the moving cutter than the second clamping member, the second clamping member includes a clamping part and two insertion parts, the two insertion parts are located at opposite ends of the clamping part along the second direction, the two insertion parts of the second clamping member are respectively inserted into the two decorative covers and welded to the two decorative covers respectively.

[0015] Furthermore, the cutter head module satisfies at least one of the following conditions: along the second direction, the surface of the clamping portion near the decorative cover is closer to the decorative cover than the surface of the stationary blade facing the decorative cover; the surface of the clamping portion facing the decorative cover is closer to the decorative cover than the surface of the first clamping member facing the decorative cover; along the second direction, the surface of the arc-shaped mesh portion facing the decorative cover is closer to the decorative cover than the surface of the second fixing portion facing the decorative cover; the inner side of the decorative cover is provided with a boss, which is used to abut against the arc-shaped mesh portion.

[0016] This application provides a cutting head device, which includes a cutting head housing assembly and a cutting head module provided in this application, wherein the cutting head module is disposed within the cutting head housing assembly.

[0017] This application provides a hair trimmer, which includes a blade head device and a main body. The main body includes a motor module and a housing. The motor module is disposed in the housing, and the transmission rod of the motor module protrudes from the housing and is connected to the blade head module of the blade head device.

[0018] In this application, the moving blade assembly is disposed within the stationary blade assembly, and the moving blade assembly is movable relative to the stationary blade assembly along a second direction. The outer surface of the arc-shaped cutting portion of the moving blade is fitted against the inner surface of the stationary blade to achieve hair cutting. Two first fixing parts are respectively connected to the opposite ends of the arc-shaped cutting portion, and the two first fixing parts are located on opposite sides of the moving blade holder to mount the moving blade on the moving blade holder, facilitating the overall movement of the moving blade assembly relative to the stationary blade assembly. Along a direction perpendicular to the second direction and perpendicular to the arrangement direction of the stationary blade and the moving blade, i.e., along the first direction, the distance L1 between the surface of the first clamping member near the moving blade assembly and the surface of the first fixing part near the first clamping member satisfies the range 0.1mm≤L1≤1mm, and the distance between the moving blade assembly and the stationary blade assembly in the first direction is within a reasonable range. On the one hand, when the moving blade assembly moves relative to the stationary blade assembly in the second direction, the first fixing part can be prevented from colliding with the first clamping member, thus avoiding interference between the stationary blade assembly and the moving blade assembly. The moving blade assembly can move smoothly to cut the hair, resulting in a better cutting effect when the blade module is applied to the hair trimmer. On the other hand, it can prevent the distance between the first clamping member and the first fixing part from being too large, which would cause the width of the blade module in the first direction to be too large, thus facilitating the miniaturization design of the blade module when applied to the hair trimmer. When the value of L1 is too large, although interference between the moving blade assembly and the stationary blade assembly can be avoided during movement, it may cause the width of the blade module in the first direction to be too large, which is not conducive to the miniaturization design of the blade module when applied to the hair trimmer. If the width of the blade module in the first direction is constant, and the value of the spacing L1 is too large, it may cause the width of the moving blade holder in the first direction to be too small. This results in a lower structural strength of the moving blade holder, reducing the structural stability of the moving blade assembly relative to the stationary blade assembly when the motor module drives the moving blade assembly to move via the transmission rod in the second direction. Conversely, if the value of L1 is too small, the moving space of the moving blade assembly is limited. When the moving blade assembly moves relative to the stationary blade assembly in the second direction, it may wobble to some extent, potentially causing interference between the moving blade assembly and the stationary blade assembly. Specifically, the first fixing part may collide with the first clamping member, affecting the smoothness of the moving blade assembly relative to the stationary blade assembly in the second direction. This, in turn, affects the cutting efficiency of the blade module when applied to a hair trimmer, resulting in poor performance of both the blade module and the hair trimmer. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a cutter head module according to an embodiment of this application;

[0021] Figure 2 This is an exploded view of the cutter head module according to an embodiment of this application;

[0022] Figure 3 This is a top view of a cutter head module according to an embodiment of this application;

[0023] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0024] Figure 5 This is a schematic diagram of the moving blade according to an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the structure of a hair trimmer according to an embodiment of this application;

[0026] Figure 7 This is an exploded view of a hair trimmer according to an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the structure of a static knife according to an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of the moving tool holder according to an embodiment of this application;

[0029] Figure 10 This is a schematic diagram of the moving tool holder according to another embodiment of this application;

[0030] Figure 11 for Figure 2 Enlarged view of the dashed box in section B;

[0031] Figure 12 This is a schematic diagram of the structure of the second clamping member according to an embodiment of this application;

[0032] Figure 13 for Figure 1 Enlarged view of the dashed box in the middle (C);

[0033] Figure 14 for Figure 2 Enlarged view of the dashed box in the middle D;

[0034] Figure 15This is a schematic diagram of the cutter head device according to an embodiment of this application;

[0035] Figure 16 This is a schematic diagram of the cutter head device according to another embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-Cut head module, 110-Stationary cutter assembly, 111-Stationary cutter, 1111-Arc-shaped mesh section, 1112-Second fixing section, 112-Frame, 1121-First clamping member, 1122-Second clamping member, 1123-Positioning hole, 1124-Clamping section, 1125-Plug-in section, 113-Stationary cutter holder, 114-Installation space, 120-Moving cutter assembly, 121-Moving cutter holder, 1211-Body section, 1212-Support section, 1213-First side, 1214-Second side, 121 5-Protrusion, 1216-Welding column, 1217-Mounting hole, 1218-Weight reduction space, 1219-Arc-shaped protrusion, 122-Moving blade, 1221-Arc-shaped shearing part, 1222-First fixing part, 1223-Fixing sub-part, 1224-Welding sub-part, 1225-Notch, 1226-Transition part, 130-Decorative cover, 200-Blade head device, 210-Blade head housing assembly, 300-Hair trimmer, 310-Main body, 311-Motor module, 3111-Transmission rod, 312-Housing. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0040] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] Common hair trimmers consist of moving and stationary blades that fit together. A drive mechanism moves the moving blades back and forth relative to the stationary blades to cut and trim the hair. However, if the movement space of the moving blades relative to the stationary blades is too limited, the blades may interfere with each other, affecting the cutting effect of the hair trimmer and resulting in poor performance.

[0042] Please see Figures 1 to 5 This application provides a cutting head module 100, which includes a stationary cutting head assembly 110 and a moving cutting head assembly 120. The stationary cutting head assembly 110 includes a stationary cutting head 111 and a stationary cutting head holder 113. The stationary cutting head holder 113 includes a moving cutting head assembly along a first direction (e.g., ...). Figure 3 Two frame bodies 112 are arranged at intervals (as shown in the Y direction). The two frame bodies 112 are respectively fixed to the opposite ends of the stationary blade 111. The stationary blade 111 and the two frame bodies 112 form an installation space 114. The moving blade assembly 120 is disposed in the installation space 114 of the stationary blade assembly 110. The moving blade assembly 120 includes a moving blade holder 121 and a moving blade 122 fixed to the moving blade holder 121. The moving blade 122 includes an arc-shaped shearing part 1221 and two first fixing parts 1222. The two first fixing parts 1222 are connected to the opposite ends of the arc-shaped shearing part 1221 and are located on opposite sides of the moving blade holder 121 and are respectively connected to the moving blade holder 121. The outer surface of the arc-shaped shearing part 1221 is fitted to the inner surface of the stationary blade 111. The moving blade assembly 120 is used to cooperate with the stationary blade assembly 110 and can move relative to the stationary blade assembly 110 in a second direction (e.g., ...). Figure 1 The first direction (as shown in the X direction) reciprocates; wherein the first direction intersects the second direction, and along the first direction, the distance L1 between the inner side of the mounting space 114 and the first fixing part 1222 satisfies the range: 0.1mm≤L1≤1mm.

[0043] Understandably, please also refer to Figure 6 and Figure 7The blade module 100 is applied to the hair trimmer 300, which also includes a main body 310. The main body 310 includes a motor module 311 and a housing 312. The motor module 311 is disposed in the housing 312. The transmission rod 3111 of the motor module 311 protrudes from the housing 312. The transmission rod 3111 is connected to the blade module 100 of the blade device 200. Specifically, the transmission rod 3111 is connected to the moving blade holder 121 of the moving blade assembly 120. The motor module 311 is used to provide power to the moving blade assembly 120 so that the moving blade assembly 120 reciprocates relative to the stationary blade assembly 110 in a second direction.

[0044] Understandably, the first direction is the width direction of the cutter head module 100, and the second direction is the length direction of the cutter head module 100.

[0045] Optionally, in some embodiments, the arc-shaped shearing part 1221 is directly connected to the first fixing part 1222; in another embodiment, the arc-shaped shearing part 1221 and the first fixing part 1222 are bent and connected. The specific structure of the moving blade 122 is not limited here.

[0046] Optionally, the first direction is perpendicular to the second direction.

[0047] Understandably, the distance between the inner side of the mounting space 114 and the first fixing part 1222 can be the distance between the surface of the frame 112 near the moving blade assembly 120 and the surface of the first fixing part 1222 near the frame 112.

[0048] Specifically, the distance L1 between the inner side of the installation space 114 and the first fixing part 1222 can be, but is not limited to, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.8mm, 0.9mm and 1mm.

[0049] In this embodiment, the moving blade assembly 120 is disposed within the mounting space 114 of the stationary blade assembly 110, and the moving blade assembly 120 is movable relative to the stationary blade assembly 110 along a second direction. The outer surface of the arc-shaped cutting portion 1221 of the moving blade 122 is fitted against the inner surface of the stationary blade 111 to achieve hair cutting. Two first fixing portions 1222 are respectively connected to the opposite ends of the arc-shaped cutting portion 1221, and the two first fixing portions 1222 are located on opposite sides of the moving blade holder 121 to mount the moving blade 122 on the moving blade holder 121, facilitating the overall movement of the moving blade assembly 120 relative to the stationary blade assembly 110. Along the first direction, the two frames 112 respectively fix the opposite ends of the stationary blade 111. The stationary blade 111 and the two frames 112 form an installation space 114. The distance L1 between the inner side of the installation space 114 and the first fixing part 1222 satisfies the range 0.1mm≤L1≤1mm. The distance between the moving blade assembly 120 and the stationary blade assembly 110 in the first direction is within a reasonable range. On the one hand, when the moving blade assembly 120 moves relative to the stationary blade assembly 110 along the second direction, the first fixing part 1222 can be prevented from colliding with the frame 112, so as to avoid interference between the stationary blade assembly 110 and the moving blade assembly 120. The moving blade assembly 120 can move smoothly to cut the hair, so that the blade module 100 applied to the hair trimmer 300 has a better cutting effect on the hair. On the other hand, this avoids the excessive distance between the frame 112 and the first fixing part 1222, which would result in an excessively large width of the blade module 100 in the first direction. This is beneficial for miniaturizing the blade module 100 when applied to the hair trimmer 300. When the value of L1 is too large, although interference between the moving blade assembly 120 and the stationary blade assembly 110 during movement can be avoided, it may cause the blade module 100 to be too wide in the first direction, which is not conducive to the miniaturization of the blade module 100 when applied to the hair trimmer 300. If the width of the blade module 100 in the first direction is constant, an excessively large value of the distance L1 may cause the width of the moving blade holder 121 in the first direction to be too small. The structural strength of the moving blade holder 121 will be low, and when the motor module 311 drives the moving blade assembly 120 to move through the transmission rod 3111, the structural stability of the moving blade assembly 120 relative to the stationary blade assembly 110 in the second direction will be reduced.When the value of L1 is too small, the moving space of the moving blade assembly 120 is relatively limited. When the moving blade assembly 120 moves relative to the stationary blade assembly 110 in the second direction, the moving blade assembly 120 may wobble to a certain extent, which may cause the moving blade assembly 120 and the stationary blade assembly 110 to interfere with each other. That is, the first fixing part 1222 may collide with the frame 112, affecting the smoothness of the moving blade assembly 120 relative to the stationary blade assembly 110 in the second direction. This affects the cutting efficiency of the blade head module 100 when applied to the hair trimmer 300, resulting in poor performance of the blade head module 100 and the hair trimmer 300.

[0050] Optionally, in some embodiments, the frame 112 includes a first clamping member 1121 and a second clamping member 1122, which are disposed on opposite sides of the stationary blade 111.

[0051] Understandably, along the first direction, the second clamping member 1122 of one frame 112, one end of the stationary blade 111, the first clamping member 1121 of one frame 112, the moving blade assembly 120, the first clamping member 1121 of another frame 112, the other end of the stationary blade 111, and the second clamping member 1122 of the other frame 112 are arranged sequentially.

[0052] Optionally, the arc-shaped cutting section 1221 has an arc-shaped cutting blade. When the hair enters the moving blade 122 through the stationary blade 111, the moving blade 122 moves relative to the stationary blade 111 in a second direction and cuts the hair.

[0053] Optionally, the moving blade 122 further includes two transition portions 1226, each of which is located between the arc-shaped cutting portion 1221 and one of the first fixing portions 1222. Along the first direction, the distance between the opposite ends of the two arc-shaped cutting portions 1221 is greater than the distance between the two first fixing portions 1222. This is beneficial for increasing the contact area between the stationary blade 111 and the moving blade 122, thereby improving the cutting efficiency of the blade module 100 applied to the hair trimmer 300.

[0054] Optionally, the movable blade 122 satisfies at least one of the following conditions: the distance L2 between the outer side of the first fixing part 1222 and the outermost end point of the movable blade 122 satisfies the range: 0.4mm≤L2≤0.8mm; the distance L3 between the two first fixing parts 1222 satisfies the range: 3.5mm≤L3≤5.5mm.

[0055] Understandably, in some embodiments, the L2 of the moving blade 122 satisfies the range 0.4mm ≤ L2 ≤ 0.8mm. In other embodiments, the L3 of the moving blade 122 satisfies the range 3.5mm ≤ L3 ≤ 5.5mm. In still other embodiments, the L2 of the moving blade 122 satisfies the range 0.4mm ≤ L2 ≤ 0.8mm and the L3 satisfies the range 3.5mm ≤ L3 ≤ 5.5mm.

[0056] Specifically, the distance L2 between the outer surface of the first fixing part 1222 and the outermost end point of the moving blade 122 can be, but is not limited to, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm and 0.8mm.

[0057] Specifically, the value of the distance L3 between the two first fixing parts 1222 can be, but is not limited to, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.3mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.3mm and 5.5mm.

[0058] In this embodiment, when the distance L2 between the outer surface of the first fixing part 1222 and the outermost end point of the moving blade 122 satisfies the range of 0.4mm ≤ L2 ≤ 0.8mm, the strength of the moving blade 122 can be guaranteed, and interference between the first fixing part 1222 of the moving blade 122 and the stationary blade assembly 110 can be avoided, leaving sufficient clearance. If the distance L2 between the outer surface of the first fixing part 1222 and the outermost end point of the moving blade 122 is too small, the gap between the first fixing part 1222 and the stationary blade assembly 110 will be reduced, and they are prone to interference. If the distance L2 between the outer surface of the first fixing part 1222 and the outermost end point of the moving blade 122 is too large, the length of the transition part 1226 will be increased, thereby reducing the strength and stability of the moving blade 122.

[0059] When the distance L3 between the two first fixing parts 1222 meets the range of 3.5mm ≤ L3 ≤ 5.5mm, the strength of the moving blade 122 is guaranteed, and interference between the first fixing part 1222 of the moving blade 122 and the stationary blade assembly 110 is avoided, leaving sufficient clearance. If the distance L3 between the two first fixing parts 1222 is too large, the gap between the first fixing part 1222 and the stationary blade assembly 110 will be reduced, and they will easily interfere. If the distance L3 between the two first fixing parts 1222 is too small, the length of the transition part 1226 will be increased, thereby reducing the strength and stability of the moving blade 122.

[0060] Optionally, please also see Figure 8The stationary blade 111 includes an arc-shaped mesh portion 1111 and two second fixing portions 1112. The arc-shaped mesh portion 1111 has multiple mesh holes. The two second fixing portions 1112 are respectively connected to the opposite ends of the arc-shaped mesh portion 1111. The inner side of the arc-shaped mesh portion 1111 is fitted to the outer side of the moving blade 122. The two frame bodies 112 respectively clamp the two second fixing portions 1112.

[0061] Understandably, in the illustrations of this application, for the sake of simplification, the mesh openings of the arc-shaped mesh portion 1111 are not shown, and should not be construed as meaning that there are no mesh openings on the arc-shaped mesh portion 1111.

[0062] Understandably, the two second fixing parts 1112 are respectively connected to the opposite ends of the arc-shaped mesh part 1111, and the arc-shaped mesh part 1111 and the two second fixing parts 1112 form a U-shaped structure.

[0063] Understandably, the arc-shaped mesh portion 1111 has multiple mesh holes, through which hair enters the gap between the moving blade 122 and the stationary blade 111, and the hair is cut by the reciprocating motion of the stationary blade 111 relative to the moving blade 122 in the second direction.

[0064] Understandably, the first clamping member 1121 and the second clamping member 1122 are respectively disposed on opposite sides of the second fixing part 1112 to clamp the second fixing part 1112. Specifically, the first clamping member 1121 and the second clamping member 1122 are respectively disposed on opposite sides of the second fixing part 1112 along a first direction.

[0065] Please see also Figures 2 to 4 , Figure 9 and Figure 10 In some embodiments, the movable blade holder 121 includes a body portion 1211 and at least two support portions 1212. The body portion 1211 has a first side surface 1213 and a second side surface 1214 disposed opposite to each other. At least one support portion 1212 is disposed on the first side surface 1213 and extends along the second direction, and at least one support portion 1212 is disposed on the second side surface 1214 and extends along the second direction. The plurality of support portions 1212 are used to support the first fixing portion 1222 of the movable blade 122.

[0066] Understandably, one part of the moving blade 122, the first fixing part 1222, is disposed on the first side 1213, and the other part of the moving blade 122, the first fixing part 1222, is disposed on the second side 1214.

[0067] In this embodiment, the body portion 1211 has a first side surface 1213 and a second side surface 1214 disposed opposite to each other along a first direction. At least one support portion 1212 is disposed on the first side surface 1213 and extends along the second direction, and at least one support portion 1212 is disposed on the second side surface 1214 and extends along the second direction. The plurality of support portions 1212 are used to support the first fixing portion 1222 of the moving blade 122. Then, the inner side surface of the first fixing portion 1222 of the stationary blade 111 abuts against the first side surface 1213 or the second side surface 1214, and the bottom of the first fixing portion 1222 is supported by the support portion 1212. In other words, the support portion 1212 can stably support the first fixing portion 1222 to improve the structural stability of the moving blade 122 mounted on the moving blade holder 121.

[0068] In some embodiments, the movable tool holder 121 further includes a protrusion 1215, which protrudes from the surface of the support portion 1212. The surface of the protrusion 1215 facing away from the support portion 1212 is closer to the first clamping member 1121 of the frame 112 than the surface of the first fixing portion 1222 facing away from the body portion 1211.

[0069] Understandably, the first fixing part 1222 is away from the surface of the body part 1211, and can be the outer side surface of the first fixing part 1222.

[0070] Understandably, the surface of the protrusion 1215 facing away from the support portion 1212 is closer to the first clamping member 1121 than the surface of the support portion 1212 facing away from the body portion 1211.

[0071] In this embodiment, the protrusion 1215 protrudes from the surface of the support portion 1212, so that when the moving blade assembly 120 moves relative to the stationary blade assembly 110 in the second direction and experiences a certain degree of wobbling, the surface of the protrusion 1215 facing away from the support portion 1212 contacts the first clamping member 1121 before the surface of the first fixing portion 1222 facing away from the body portion 1211. Compared to the scheme where the surface of the first fixing portion 1222 facing away from the body portion 1211 directly collides and rubs with the first clamping member 1121, the surface area of ​​the protrusion 1215 facing away from the support portion 1212 is smaller, which can effectively reduce the friction area between the moving blade assembly 120 and the stationary blade assembly 110, thereby converting the friction between surfaces into friction between surfaces and lines, or friction between surfaces and points, thus avoiding direct wear on the first fixing portion 1222 and helping to maintain the structural integrity and stability of the moving blade 122.

[0072] Optionally, along the first direction, the distance d between the protrusion 1215 and the first clamping member 1121 satisfies the range: 0.1mm≤d≤1mm.

[0073] Understandably, the distance between the protrusion 1215 and the first clamping member 1121 can be the distance between the surface of the protrusion 1215 near the first clamping member 1121 and the surface of the first clamping member 1121 facing the protrusion 1215.

[0074] Specifically, the distance d between the protrusion 1215 and the first clamping member 1121 can be, but is not limited to, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.8mm, 0.9mm, and 1mm.

[0075] In this embodiment, along the first direction, the distance between the protrusion 1215 and the first clamping member 1121 satisfies the range of 0.1mm≤d≤1mm. When the moving blade assembly 120 moves relative to the stationary blade assembly 110 along the second direction, and the moving blade assembly 120 shakes to a certain extent, there is still a certain distance between the protrusion 1215 and the first clamping member 1121, so as to avoid mutual interference between the protrusion 1215 and the first clamping member 1121 as much as possible. The moving blade assembly 120 can smoothly reciprocate along the second direction to cut the hair.

[0076] In some embodiments, the surface of the protrusion 1215 facing away from the support 1212 is an arc surface.

[0077] In this embodiment, when the surface of the protrusion 1215 facing away from the support 1212 is arc-shaped, the area of ​​the surface of the protrusion 1215 facing away from the support 1212 can be further reduced. When the moving blade assembly 120 moves relative to the stationary blade assembly 110 in the second direction and a certain degree of shaking occurs, the arc-shaped surface of the protrusion 1215 contacts and rubs against the first clamping member 1121, which can greatly reduce the friction area of ​​the relative sliding between the moving blade assembly 120 and the stationary blade assembly 110, so as to avoid reducing the efficiency of the moving blade assembly 120 relative to the stationary blade assembly 110, thereby ensuring the cutting effect of the hair by the cooperation of the moving blade assembly 120 and the stationary blade assembly 110.

[0078] Optionally, the protrusion 1215 may be, but is not limited to, a protrusion, an arched structure, or a cylindrical structure.

[0079] Please see also Figure 5 , Figures 9 to 11 In some embodiments, the moving tool holder 121 further includes a welding post 1216 disposed on the body portion 1211, with both ends of the welding post 1216 protruding from the body portion 1211; the first fixing portion 1222 includes a fixing sub-portion 1223 and a welding sub-portion 1224 connected together, the welding sub-portion 1224 being used for welding with the welding post 1216; the first fixing portion 1222 has a notch 1225, the notch 1225 being disposed on at least one side of the welding sub-portion 1224.

[0080] Understandably, the fixed sub-part 1223 is fixed to the moving tool holder 121.

[0081] Optionally, in some embodiments, one end of the welding post 1216 protrudes from the first side surface 1213, and the other end of the welding post 1216 protrudes from the second side surface 1214. In other embodiments, there are multiple welding posts 1216, with some welding posts 1216 protruding from the first side surface 1213 and others protruding from the second side surface 1214, and the welding posts 1216 located on the first side surface 1213 and the welding posts 1216 located on the second side surface 1214 are respectively arranged in a one-to-one correspondence.

[0082] Understandably, the welded sub-part 1224 and the welded column 1216 are connected by laser welding.

[0083] In this embodiment, the inner sidewalls of the fixing sub-parts 1223 of the two first fixing parts 1222 respectively abut against the first side surface 1213 and the second side surface 1214, wherein the welding sub-part 1224 of the first fixing part 1222 is welded to one end of the welding column 1216, and the welding sub-part 1224 of the other first fixing part 1222 is welded to the other end of the welding column 1216, and the welding column 1216 can provide support for the welding sub-part 1224 to improve the structural stability of the moving blade 122 installed on the moving blade holder 121. Furthermore, since the notch 1225 is provided on at least one side of the welding sub-part 1224, the connection area between the welding sub-part 1224 and the welding column 1216 will be at a high temperature during the welding process, which may cause local deformation of the welding sub-part 1224. Providing the notch 1225 on at least one side of the welding sub-part 1224 helps to release stress, tension, or heat, thereby preventing stress from being transmitted to the fixing sub-part 1223 and causing deformation in other areas of the fixing sub-part 1223. This can optimize the welding process between the first fixing part 1222 and the moving tool holder 121, improve the connection stability between the moving tool 122 and the moving tool holder 121, and ensure the structural stability of the moving tool 122, which is beneficial to extending the service life of the moving tool 122.

[0084] Optionally, in some embodiments, the body portion 1211 has a through hole, the welding post 1216 passes through the through hole, and one end of the welding post 1216 protrudes from the first side surface 1213, and the other end of the welding post 1216 protrudes from the second side surface 1214. The welding post 1216 is interference-fitted with the through hole and is bonded by adhesive to improve the structural stability of the welding post 1216 disposed in the through hole.

[0085] Optionally, in other embodiments, the welding column 1216 is directly welded to the first side 1213 and the second side 1214, and along the first direction, the welding column 1216 located on the first side 1213 and the welding column 1216 located on the second side 1214 are respectively arranged in a one-to-one correspondence, so as to facilitate welding of the two first fixing parts 1222 of the moving blade 122.

[0086] Please see also Figures 1 to 11In some embodiments, the blade module 100 is applied to a hair trimmer 300, which further includes a body 310. The body 310 includes a motor module 311 and a housing 312. The motor module 311 is disposed in the housing 312, and a transmission rod 3111 of the motor module 311 protrudes from the housing 312. The transmission rod 3111 is connected to the blade module 100. The body portion 1211 has a mounting hole 1217 for inserting the transmission rod 3111 of the motor module 311. Along the third direction (e.g.) Figure 6 In the Z direction (as shown), the mounting hole 1217 penetrates two opposite surfaces of the body part 1211, wherein the third direction intersects with the first direction and the second direction respectively.

[0087] Understandably, the third direction refers to the arrangement direction of the cutter head module 100 and the main body 310, and the third direction refers to the height direction of the cutter head module 100.

[0088] Understandably, the mounting hole 1217 is used to position one end of the transmission rod 3111 away from the motor module 311.

[0089] Understandably, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0090] In this embodiment, the motor module 311 is disposed on the housing 312, and the transmission rod 3111 of the motor module 311 protrudes from the housing 312 to connect with the moving blade holder 121 of the moving blade assembly 120. Specifically, one end of the transmission rod 3111 facing away from the motor module 311 is inserted into the mounting hole 1217 to improve the connection stability between the motor module 311 and the moving blade assembly 120. When the motor module 311 is started, it provides power to the moving blade assembly 120 and drives the moving blade holder 121 and the moving blade 122 to reciprocate along the second direction via the transmission rod 3111, so as to realize the movement of the moving blade assembly 120 relative to the stationary blade assembly 110 in the second direction to cut the hair.

[0091] Understandably, the moving tool holder 121 is an injection molded part.

[0092] In some embodiments, the body portion 1211 further includes a plurality of weight-reduction spaces 1218, which are respectively spaced apart on both sides of the mounting hole 1217.

[0093] Understandably, the weight reduction space 1218 is spaced apart from the mounting hole 1217, and along the arrangement direction of the cutter head module 100 and the main body 310, the weight reduction space 1218 penetrates at least one surface of the main body 1211.

[0094] Optionally, the weight reduction space 1218 can be, but is not limited to, a through hole, a blind hole, a groove, etc.

[0095] In this embodiment, the body portion 1211 has a plurality of weight-reduction spaces 1218 spaced apart from the mounting holes 1217. The weight-reduction spaces 1218 are formed by removing material from certain parts of the model during the fabrication process of the moving blade holder 121, thereby reducing the weight of the moving blade holder 121. In addition, forming the weight-reduction spaces 1218 can also prevent excessive internal stress in the moving blade holder 121 from causing deformation, thereby giving the moving blade holder 121 better structural stability. This is beneficial for the moving blade holder 121 to support the moving blade 122 and drive the moving blade 122 to reciprocate in the second direction, so as to ensure the cutting effect of the blade module 100 on the hair trimmer 300.

[0096] In some embodiments, along the second direction, the body portion 1211 further has an arcuate protrusion 1219, which is located within the weight reduction space 1218.

[0097] Understandably, the arcuate protrusion 1219 is connected to at least one sidewall of the weight reduction space 1218 along the second direction.

[0098] In this embodiment, the main body 1211 also has an arc-shaped protrusion 1219, and the arc-shaped protrusion 1219 is located in the weight reduction space 1218. The surface of the arc-shaped protrusion 1219 is an arc-shaped surface, which can realize the uniform change of the wall thickness of the weight reduction space 1218, prevent the moving tool holder 121 from shrinking, and make the moving tool holder 121 have better structural stability.

[0099] Optionally, in other embodiments, the welding post 1216 passes through the arc-shaped protrusion 1219, and the arc-shaped protrusion 1219 can also provide support for the welding post 1216 so that the welding post 1216 can bear the weight of the moving blade 122 and improve the stability of the connection between the moving blade 122 and the moving blade holder 121.

[0100] Optionally, in some embodiments, the first clamping member 1121, the stationary blade 111, and the second clamping member 1122 are formed by through welding, so that the first clamping member 1121, the stationary blade 111, and the second clamping member 1122 are tightly connected, thereby improving the structural stability of the frame 112 clamping the stationary blade 111.

[0101] Specifically, the first clamping member 1121, the second fixing part 1112 of the stationary knife 111 and the second clamping member 1122 are formed by through welding.

[0102] In some embodiments, the first clamping member 1121, the second fixing part 1112 and the second clamping member 1122 each have a positioning hole 1123 that is directly corresponding to each other, and the positioning hole 1123 is used to be disposed on the positioning tool.

[0103] In this embodiment, the first clamping member 1121, the second fixing part 1112, and the second clamping member 1122 all have corresponding positioning holes 1123, so that the first clamping member 1121, the stationary blade 111, and the second clamping member 1122 can all be positioned by the positioning tool, so as to facilitate further processing of the first clamping member 1121, the stationary blade 111, and the second clamping member 1122, such as through welding, to improve the accuracy of the first clamping member 1121 and the second clamping member 1122 clamping the opposite sides of the stationary blade 111.

[0104] Please see also Figures 12 to 14 In some embodiments, the blade module 100 further includes two decorative covers 130, which are respectively disposed on opposite sides of the stationary blade assembly 110 along the second direction. The first clamping member 1121 is closer to the moving blade 122 than the second clamping member 1122. The second clamping member 1122 includes a clamping part 1124 and two insertion parts 1125. The two insertion parts 1125 are located at opposite ends of the clamping part 1124 along the second direction. The two insertion parts 1125 of the second clamping member 1122 are respectively inserted into the two decorative covers 130 and welded to the two decorative covers 130 respectively.

[0105] In this embodiment, the two insertion portions 1125 of the second clamping member 1122 are respectively inserted into the two decorative covers 130 and welded to the two decorative covers 130, thereby achieving connection with the decorative covers 130. The clamping portion 1124 fits against the side of the stationary knife 111 away from the first clamping member 1121 to cooperate with the first clamping member 1121 to clamp and fix the second fixing portion 1112 of the stationary knife 111.

[0106] Furthermore, along the second direction, the surface of the clamping portion 1124 near the decorative cover 130 is closer to the decorative cover 130 than the surface of the stationary blade 111 facing the decorative cover 130, and the surface of the clamping portion 1124 facing the decorative cover 130 is closer to the decorative cover 130 than the surface of the first clamping member 1121 facing the decorative cover 130.

[0107] Understandably, along the second direction, the surface of the clamping portion 1124 near the decorative cover 130 is closer to the decorative cover 130 than the surface of the second fixing portion 1112 of the stationary knife 111 facing the decorative cover 130.

[0108] In this embodiment, along the second direction, the surface of the clamping portion 1124 near the decorative cover 130 is closer to the decorative cover 130 than the surface of the stationary blade 111 facing the decorative cover 130, and the surface of the clamping portion 1124 facing the decorative cover 130 is closer to the decorative cover 130 than the surface of the first clamping member 1121 facing the decorative cover 130. In other words, the surface of the clamping portion 1124 near the decorative cover 130, the surface of the stationary blade 111 facing the decorative cover 130, and the surface of the first clamping member 1121 facing the decorative cover 130 are not flush. Furthermore, along the second direction, the clamping portion 1124 has the longest length, so that during the process of inserting the second clamping member 1122 into the two decorative covers 130, the opposite ends of the clamping portion 1124 abut against the two decorative covers 130 respectively, thereby achieving a tight connection with the decorative cover 130. At this time, the lengths of the first clamping member 1121 and the stationary blade 111 along the second direction are relatively small, and they will not interfere with the assembly of the second clamping member 1122 and the decorative cover 130. Compared with the scheme where the surface of the clamping part 1124 close to the decorative cover 130, the surface of the stationary blade 111 facing the decorative cover 130, and the surface of the first clamping member 1121 facing the decorative cover 130 are flush, the cutter head module 100 of this embodiment reduces the machining accuracy of the stationary blade 111 and the first clamping member 1121, and simplifies the assembly steps of the second clamping member 1122 and the decorative cover 130, which is beneficial to improving the machining performance and manufacturing performance of the cutter head module 100.

[0109] Please see Figure 8In some embodiments, the stationary blade 111 includes an arc-shaped mesh portion 1111 and two second fixing portions 1112. The arc-shaped mesh portion 1111 has multiple mesh holes. The two second fixing portions 1112 are respectively connected to the opposite ends of the arc-shaped mesh portion 1111. The inner side of the arc-shaped mesh portion 1111 is disposed in contact with the outer side of the moving blade 122. The two frames 112 respectively clamp the two second fixing portions 1112. Along the second direction, the surface of the arc-shaped mesh portion 1111 facing the decorative cover 130 is closer to the decorative cover 130 than the surface of the second fixing portions 1112 facing the decorative cover 130. The inner side of the decorative cover 130 is provided with a boss (not shown) for supporting the arc-shaped mesh portion 1111.

[0110] Understandably, along the second direction, the length of the arc-shaped mesh portion 1111 is greater than the length of the second fixing portion 1112.

[0111] Understandably, along the second direction, the distance between the surface of the arc-shaped mesh portion 1111 facing the decorative cover 130 and the decorative cover 130 is less than the distance between the surface of the second fixing portion 1112 facing the decorative cover 130 and the decorative cover 130.

[0112] In this embodiment, along the second direction, the surface of the arc-shaped mesh portion 1111 facing the decorative cover 130 is closer to the decorative cover 130 than the surface of the second fixing portion 1112 facing the decorative cover 130. In other words, along the second direction, the length of the arc-shaped mesh portion 1111 is greater than the length of the second fixing portion 1112, and the surface of the second fixing portion 1112 facing the decorative cover 130 is spaced apart from the decorative cover 130. Firstly, the larger the length of the arc-shaped mesh portion 1111 along the second direction, the larger the area of ​​the arc-shaped mesh portion 1111 can be, thereby effectively increasing the hair entry area. Hair can enter the gap between the moving blade 122 and the stationary blade 111 through the mesh, thereby improving the hair cutting efficiency when the blade module 100 is applied to the hair trimmer 300. Secondly, along the second direction, the distance between the surface of the arc-shaped mesh portion 1111 facing the decorative cover 130 and the decorative cover 130 is small or almost zero, which allows the arc-shaped mesh portion 1111 to be tightly connected to the decorative cover 130, giving the cutter head module 100 a smooth appearance and improving its aesthetic appeal. Thirdly, along the second direction, the distance between the surface of the second fixing portion 1112 facing the decorative cover 130 and the decorative cover 130 prevents the second fixing portion 1112 from interfering with the assembly of the second clamping member 1122 and the decorative cover 130, effectively reducing the machining accuracy of the stationary cutter 111 and the assembly accuracy of the cutter head module 100, and improving the machining and fabrication performance of the cutter head module 100. In addition, the decorative cover 130 has a protrusion on its inner side. The thickness of the stationary blade 111 is small, only 40μm to 60μm, which makes the structural strength of the stationary blade 111 weak. The protrusion on the inner side of the decorative cover 130 can be used to support the end of the arc-shaped mesh portion 1111 to prevent the stationary blade 111 from deforming under force and to improve the installation strength of the stationary blade 111 on the blade module 100.

[0113] Please see also Figure 15 and Figure 16 This application provides a cutting head device 200, which includes a cutting head housing assembly 210 and a cutting head module 100 provided in this application, wherein the cutting head module 100 is disposed within the cutting head housing assembly 210.

[0114] Understandably, in the cutter head device 200, the number of cutter head modules 100 is at least one, and may be, but is not limited to, one, two, three, etc., and at least one of the cutter head modules 100 is disposed within the cutter head housing assembly 210.

[0115] In the cutter head device 200 provided in this embodiment, the cutter head module 100 is disposed within the cutter head housing assembly 210. In the cutter head module 100, along the arrangement direction perpendicular to the second direction and perpendicular to the stationary cutter 111 and the moving cutter 122, the distance L1 between the surface of the first clamping member 1121 near the moving cutter assembly 120 and the surface of the first fixing part 1222 near the first clamping member 1121 satisfies the range: 0.1mm≤L1≤1mm, so that the distance between the moving cutter assembly 120 and the stationary cutter assembly 110 in the first direction is within a reasonable range. When the moving blade assembly 120 moves relative to the stationary blade assembly 110 in the second direction, the first fixing part 1222 can be prevented from colliding with the first clamping member 1121, thus avoiding interference between the stationary blade assembly 110 and the moving blade assembly 120. The moving blade assembly 120 can move smoothly to cut the hair, resulting in a better cutting effect of the blade head device 200 when applied to the hair trimmer 300. On the other hand, it can prevent the distance between the first clamping member 1121 and the first fixing part 1222 from being too large, which would cause the width of the blade head module 100 in the first direction to be too large, thus facilitating the miniaturization design of the blade head device 200 when applied to the hair trimmer 300.

[0116] Please see also Figures 1 to 16 This application provides a hair trimmer 300, which includes a blade head device 200 provided in this application and a main body 310. The main body 310 includes a motor module 311 and a housing 312. The motor module 311 is disposed in the housing 312, and the transmission rod 3111 of the motor module 311 protrudes from the housing 312. The transmission rod 3111 is connected to the blade head module 100 of the blade head device 200.

[0117] Understandably, the main body 310 is located on one side of the cutter head device 200, and the transmission rod 3111 of the main body 310 is connected to the moving cutter holder 121 in the cutter head module 100 of the cutter head device 200.

[0118] In the hair trimmer 300 provided in this embodiment, the motor module 311 provides power to the moving blade assembly 120 and drives the moving blade assembly 120 to reciprocate relative to the stationary blade assembly 110 in the second direction via the transmission rod 3111. The distance between the moving blade assembly 120 and the stationary blade assembly 110 is within a reasonable range, which can avoid interference between the stationary blade assembly 110 and the moving blade assembly 120. The moving blade assembly 120 can smoothly reciprocate in the second direction to cut the hair, so that the hair trimmer 300 has a better cutting effect on the hair and can also extend the service life of the blade head device 200 and the hair trimmer 300. The hair trimmer 300 has good performance.

[0119] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A tool bit module, characterized in that, The cutter head module includes: A stationary blade assembly, comprising a stationary blade and a stationary blade holder, the stationary blade holder comprising two frame bodies spaced apart along a first direction, the two frame bodies being respectively fixed to opposite ends of the stationary blade, the stationary blade and the two frame bodies forming an installation space; and A moving blade assembly is disposed within the mounting space of the stationary blade assembly. The moving blade assembly includes a moving blade holder and a moving blade fixed to the moving blade holder. The moving blade includes an arc-shaped shearing section and two first fixing sections. The two first fixing sections are connected to opposite ends of the arc-shaped shearing section and are located on opposite sides of the moving blade holder and respectively connected to the moving blade holder. The outer surface of the arc-shaped shearing section is fitted against the inner surface of the stationary blade. The moving blade assembly is used to cooperate with the stationary blade assembly and can reciprocate relative to the stationary blade assembly in a second direction. Wherein, the first direction intersects with the second direction, and along the first direction, the distance L1 between the inner side of the installation space and the first fixing part satisfies the range: 0.1mm≤L1≤1mm.

2. The tool bit module of claim 1, wherein, The moving blade also includes two transition sections, each of which is located between the arc-shaped shearing section and one of the first fixing sections. Along the first direction, the distance between the opposite ends of the two arc-shaped shearing sections is greater than the distance between the two first fixing sections.

3. The tool bit module of claim 1, wherein, The moving blade satisfies at least one of the following conditions: The distance L2 between the outer side of the first fixing part and the outermost end point of the moving blade satisfies the range: 0.4mm≤L2≤0.8mm; The distance L3 between the two first fixing parts satisfies the range: 3.5mm≤L3≤5.5mm.

4. The tool bit module of claim 1, wherein, The movable tool holder includes a body and at least two support portions. The body has a first side and a second side disposed opposite to each other. At least one of the support portions is disposed on the first side and extends along the second direction, and at least one of the support portions is disposed on the second side and extends along the second direction. The support portions are used to support the first fixing portion of the movable tool.

5. The tool bit module of claim 4, wherein, The movable tool holder also includes a protrusion that protrudes from the surface of the support portion. The surface of the protrusion that is away from the support portion is closer to the frame than the surface of the first fixing portion that is away from the body portion.

6. The tool bit module of claim 5, wherein, The surface of the protrusion facing away from the support is an arc surface.

7. The tool bit module of claim 4, wherein, The moving tool holder also includes a welding column disposed on the main body, with both ends of the welding column protruding from the main body; The first fixing part includes a fixing sub-part and a welding sub-part connected together, the welding sub-part being used for welding to the welding column; the first fixing part has a notch, the notch being disposed on at least one side of the welding sub-part.

8. The tool bit module of claim 4, wherein, The main body has a mounting hole for inserting the transmission rod of the motor module. The main body also has multiple weight-reduction spaces, which are respectively spaced apart on both sides of the mounting hole.

9. The tool bit module according to any one of claims 1 to 8, characterized in that The stationary blade includes an arc-shaped mesh portion and two second fixing portions. The arc-shaped mesh portion has multiple mesh holes. The two second fixing portions are respectively connected to the opposite ends of the arc-shaped mesh portion. The inner side of the arc-shaped mesh portion is fitted to the outer side of the moving blade. The frame includes a first clamping member and a second clamping member, which are respectively disposed on opposite sides of the second fixing part to clamp the second fixing part.

10. The tool bit module of claim 9, wherein, The first clamping member, the second fixing part, and the second clamping member all have corresponding positioning holes, which are used to be positioned on the positioning tool.

11. The tool bit module of claim 9, wherein, The cutter head module also includes two decorative covers, which are respectively disposed on opposite sides of the stationary cutter assembly along the second direction. The first clamping member is closer to the moving cutter than the second clamping member. The second clamping member includes a clamping part and two insertion parts, which are located at opposite ends of the clamping part along the second direction. The two insertion parts of the second clamping member are respectively inserted into the two decorative covers and welded to the two decorative covers respectively.

12. The cutter head module according to claim 11, characterized in that, The cutter head module satisfies at least one of the following conditions: Along the second direction, the surface of the clamping portion near the decorative cover is closer to the decorative cover than the surface of the stationary blade facing the decorative cover, and the surface of the clamping portion facing the decorative cover is closer to the decorative cover than the surface of the first clamping member facing the decorative cover; Along the second direction, the surface of the arc-shaped mesh portion facing the decorative cover is closer to the decorative cover than the surface of the second fixing portion facing the decorative cover. The inner side of the decorative cover is provided with a boss for abutting the arc-shaped mesh portion.

13. A cutting head device, characterized in that, The cutting head assembly includes: The cutter head housing assembly; and The cutter head module according to any one of claims 1 to 12, wherein the cutter head module is disposed within the cutter head housing assembly.

14. A hair trimmer characterized by The hair trimmer includes: The cutting head device as claimed in claim 13; and The main body includes a motor module and a housing. The motor module is disposed in the housing, and the transmission rod of the motor module protrudes from the housing and is connected to the cutter head module of the cutter head device.

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