Reciprocating type hair trimmer

Abstract

The utility model relates to a reciprocating type hair trimmer which comprises a reciprocating type shaver body and a shaver head or a vibrissa trimmer tool bit, the body is provided with a power system for driving an output piece to rotate, the output piece deviates from the center of a motor output shaft in the power system, the shaver head comprises a knife net, a movable knife and a tool bit shell, the movable knife is connected with the output piece, and the tool bit shell is connected with the movable knife. The movable cutter is driven by the output piece to linearly reciprocate relative to the cutter net; the nose hair trimmer tool bit comprises a tool bit assembly, a transmission part, a tool bit shell and a shell base, the tool bit assembly comprises an inner tool and an outer tool, the inner tool is in transmission connection with the transmission part, the transmission part is provided with a power transmission part deviating from the center, and the power transmission part can be driven by an output part so as to drive the transmission part to rotate and swing back and forth around the central axis. The inner cutter is driven by the transmission part to rotate and swing back and forth relative to the outer cutter to shear vibrissa. A user can utilize an existing reciprocating type shaver body, the reciprocating type shaver body can be matched with a nose hair trimmer tool bit at the same time, and the inner cutter is driven to rotate and swing in a reciprocating mode relative to the outer cutter.

Description

Technical Field

[0001] This utility model relates to the field of hair trimmer technology, and in particular to a reciprocating hair trimmer. Background Technology

[0002] There are many types of hair trimmers, including shavers, hair clippers, and nose hair trimmers, each used independently. For example, a reciprocating shaver consists of a body and a shaving head. The shaving head includes a foil and blades. The body has a power system, which includes a motor, battery, and transmission mechanism. The transmission mechanism typically consists of an eccentric wheel or cam and linkage mechanism, transmitting the motor's power to the blades to achieve horizontal reciprocating motion. Its working principle is as follows: Power drive: When the shaver's built-in motor is powered, it converts electrical energy into mechanical energy, generating high-speed rotational motion. The transmission mechanism converts the motor's rotational motion into the reciprocating linear motion of the blades. When the blades reciprocate, the beard hairs pass through the small holes in the foil and come into contact with the blades that are close to the inside of the foil. The blades cut the beard hairs during the reciprocating motion, thus achieving the shaving function.

[0003] A nose hair trimmer is a personal care tool specifically designed for trimming nose hairs. Its main function is to trim excessively long nose hairs, ensuring they are not exposed, thus maintaining personal appearance and nasal hygiene. Most nose hair trimmers on the market currently use a continuous rotating cutting method. For example, CN111390981A discloses a nose hair trimmer head, including a head cover, a head assembly, and a transmission component. The head cover is fitted over the outside of the head assembly, and the front end of the head cover has a hair inlet hole. The head assembly includes a first annular internal toothed blade and a second annular internal toothed blade. Both the first and second annular internal toothed blades include a circular base plate and ring teeth. The ring teeth are located inside the circular base plate and face the center of the circular base plate. The first annular internal toothed blade is connected to the front end of the head cover, and the bottom surface of the first annular internal toothed blade is in contact with the top surface of the second annular internal toothed blade. The transmission component is driven by the second annular internal toothed blade to rotate. Under the transmission of the transmission component, the second annular internal toothed blade rotates relative to the first annular internal toothed blade to cut nose hairs. This method has many problems in actual use. Because nose hairs grow in different directions and patterns, a continuously rotating cutting head can hardly cut them completely and quickly, often resulting in pulled hairs and incomplete cuts. This not only causes discomfort to the user but also affects the trimming effect. Therefore, a new reciprocating hair trimmer design is needed, which drives the inner blade in the nose hair trimmer head to rotate and oscillate relative to the outer blade to solve the problem of poor cutting effect of existing products. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art. This utility model provides a reciprocating hair trimmer, which allows users to use the existing reciprocating shaver body to simultaneously adapt to the nose hair trimmer head and drive the inner blade to rotate and swing back and forth relative to the outer blade.

[0005] The technical solution of this utility model is as follows: A reciprocating hair trimmer includes a reciprocating shaver body and a shaver head or nose hair trimmer head that can be adapted to the body. The reciprocating shaver body has a power system that drives at least one output component to rotate. The output component is offset from the center of the motor output shaft in the power system. The shaver head includes a foil, a moving blade, and a blade head housing. The moving blade is driven by the output component to reciprocate linearly relative to the foil to cut beard hair. The nose hair trimmer head includes a blade head assembly, a transmission component, a blade head housing, and a housing base. The blade head assembly includes an inner blade and an outer blade. The inner blade is driven by the transmission component. The transmission component is pivotally engaged with the housing base. The transmission component has a power transmission part offset from its center. This power transmission part can receive the drive of the output component, thereby driving the transmission component to rotate and reciprocate around its central axis. The inner blade is driven by the transmission component to rotate and reciprocate relative to the outer blade to cut nose hair.

[0006] By adopting the above technical solution, the trimmer is designed to combine shaving and nose hair trimming functions. The function can be switched by changing different blades, which is both convenient and practical, and meets the diverse needs of users.

[0007] The power system of a reciprocating shaver body drives the output component to rotate via a motor output shaft. The output component is designed to be offset from the center of the motor output shaft, optimizing the power transmission path. For the reciprocating shaver head, this allows the output component to drive the moving blades in a linear reciprocating motion within the foil, effectively trimming beard hairs and providing a smooth and comfortable shaving experience. For the nose hair trimmer head, the output component drives the transmission component to rotate and oscillate back and forth. The inner blade, driven by the transmission component, rotates and oscillates relative to the outer blade. This design allows for precise trimming of nose hairs while avoiding skin damage.

[0008] A further feature of this invention is that the inner blade and the transmission component are indirectly driven, wherein the swing amplitude of the reciprocating motion of the inner blade is greater than the swing amplitude of the reciprocating motion of the transmission component.

[0009] With the aforementioned further design, the fine mesh of the razor's foil allows for effective hair cutting even with a small amplitude of motion. The nose hair trimmer, however, differs significantly in its construction. Both its inner and outer blades are cylindrical, with teeth distributed circumferentially at the ends. Because the teeth on the nose hair trimmer's blades are more sparsely distributed, the amplitude of the inner blade's reciprocating motion is designed to be greater than that of the transmission component, thus increasing the inner blade's amplitude to accommodate the sparse tooth distribution. When the inner blade rotates with a large amplitude, it meets the amplitude requirements for trimming nose hairs.

[0010] A further feature of this invention is that a transmission swing arm is provided between the transmission component and the inner blade. The transmission swing arm is pivotally engaged with the housing. One end of the transmission swing arm is connected to an eccentric transmission part on the transmission component, and the other end is connected to a drive part that is offset from the center of the inner blade. The drive part rotates synchronously with the inner blade. The effective transmission arm length I output by the eccentric transmission part is greater than the effective transmission arm length II input by the transmission swing arm, or the effective transmission arm length III output by the transmission swing arm is greater than the effective transmission arm length IV input by the drive part.

[0011] By further modifying the above-mentioned design, this invention cleverly utilizes the difference in effective transmission arm lengths to create an effect that enhances the swing amplitude of the inner blade, making it greater than the swing amplitude of the transmission component, thereby further improving the effect of nose hair trimming.

[0012] A further feature of this invention is that the transmission arm and the eccentric transmission unit and drive unit are driven by gear meshing or by the combination of transmission shaft and transmission groove.

[0013] With the above-mentioned further settings, both transmission methods can effectively ensure stable power transmission, further improving the trimming efficiency and quality of the nose hair trimmer, allowing users to experience a smoother and more efficient trimming experience.

[0014] A further feature of this invention is as follows: the eccentric transmission unit has a transmission shaft A or a transmission groove A, and the transmission swing arm has a corresponding transmission groove A or transmission shaft A offset from its swing center. The transmission shaft A is inserted into the transmission groove A to achieve a transmission connection between the transmission component and the transmission swing arm; the drive unit has a transmission shaft B or a transmission groove B, and the transmission swing arm has a corresponding transmission groove B or transmission shaft B offset from its swing center. The transmission shaft B is inserted into the transmission groove B to achieve a transmission connection between the drive unit and the transmission swing arm.

[0015] With the above-described further configuration, the eccentric transmission unit has a transmission shaft or transmission groove offset from the center of the transmission component, while the transmission swing arm is designed with a corresponding transmission groove or transmission shaft offset from its swing center. When the transmission shaft is accurately inserted into the transmission groove, an efficient eccentric transmission connection is achieved between the transmission component and the transmission swing arm, which is used to drive the transmission swing arm to reciprocate and rotate. Similarly, the drive unit also has a transmission shaft or transmission groove offset from the center of the inner blade, while the transmission swing arm is equipped with a corresponding transmission groove or transmission shaft offset from its swing center. When the transmission shaft is accurately inserted into the transmission groove, the inner blade rotates synchronously with the drive unit, and an efficient eccentric transmission connection is formed between it and the transmission swing arm, which is used to drive the inner blade to reciprocate and rotate.

[0016] A further feature of this invention is that the inner blade is provided with a drive seat, the inner blade and the drive seat rotate synchronously, and the drive unit is provided on the drive seat.

[0017] The above-mentioned further design facilitates the installation of the inner blade and the drive seat, and enables precise synchronous rotation on the same axis.

[0018] A further feature of this invention is that the inner blade and the transmission component are directly driven, and the inner blade and the transmission component rotate synchronously.

[0019] The above-mentioned further design facilitates the installation of the inner blade and the transmission components, and enables precise synchronous rotation on the same axis.

[0020] A further feature of this invention is that the central axis around which the reciprocating motion of the inner blade is located is the same as the central axis around which the reciprocating motion of the transmission component is located.

[0021] With the aforementioned further modifications, this design makes the movement of the entire nose hair trimmer head more compact and efficient. The inner blade and transmission components reciprocate around the same central axis, which not only reduces energy loss during movement but also improves trimming accuracy and stability. Furthermore, this coaxial design helps reduce friction and wear between components, thereby extending the overall lifespan of the trimmer head. Users can experience a smoother and more stable trimming experience.

[0022] A further feature of this invention is that it includes an oscillating bridge mounted on the motor output shaft, the oscillating bridge having two output components, and the two output components being positioned at the same distance from the center of the motor output shaft. The transmission component in the nose hair trimmer head has a pair of power transmission parts, and the pair of power transmission parts have drive slots that cooperate with the output components. The housing has an opening below the pair of drive slots.

[0023] With the aforementioned further configuration, the pair of power transmission units of the transmission component and the pair of output components of the power system can precisely engage in transmission. This design ensures the balance and stability of the transmission component during reciprocating motion, reduces vibration and noise, and improves the user experience. Simultaneously, the opening below the pair of power transmission units in the housing provides space for connecting the pair of power transmission units to the pair of output components of the power system.

[0024] A further feature of this invention is that the outer shell of the nose hair trimmer head is adaptable to the body of a reciprocating shaver. The outer shell has a cover portion for covering the upper part of the reciprocating shaver body and a raised portion. The cover portion also covers the housing and the transmission component. The raised portion has a channel inside that is adapted to the outer blade and allows the inner and outer blades to extend. The outer blade is also connected and positioned to the raised portion. The outer circumferential surface of the raised portion has a conical structure.

[0025] With the aforementioned further design, the cover not only conceals the housing and transmission components, providing protection, but also enhances the overall integrity and aesthetics of the nose hair trimmer head and the reciprocating shaver body. The raised section protects the cylindrical inner and outer blades, and its channels provide space for the inner and outer blades to extend, allowing the head to trim smoothly. The raised section's outer circumference features a tapered design, making it easier for users to remove attached hair and debris during cleaning. Attached Figure Description

[0026] Figure 1 A structural diagram of the nose hair trimmer blade assembly in a specific embodiment of this utility model;

[0027] Figure 2 This is a structural diagram of the power system according to a specific embodiment of the present utility model;

[0028] Figure 3 This is a structural diagram of the nose hair trimmer blade head according to a specific embodiment of the present utility model;

[0029] Figure 4 This is a structural diagram of the first type of nose hair trimmer blade according to a specific embodiment of the present utility model, wherein the inner blade and the transmission component are directly driven.

[0030] Figure 5 This is an exploded view of the first type of cutting head according to a specific embodiment of the present utility model;

[0031] Figure 6 This is a diagram showing the internal structure of the second type of nose hair trimmer blade in a specific embodiment of the present invention. The swing arm and the two transmission parts are all driven by a transmission shaft and transmission groove.

[0032] Figure 7This is a structural diagram of the second type of nose hair trimmer blade according to a specific embodiment of the present invention;

[0033] Figure 8 This is an exploded view of the second type of blade head in a specific embodiment of the nose hair trimmer of this utility model;

[0034] Figure 9 This is an assembly diagram of the inner blade of the second type of nose hair trimmer head and the eccentric transmission part in a specific embodiment of this utility model;

[0035] Figure 10 This is a structural diagram of the second type of blade drive swing arm for a nose hair trimmer blade according to a specific embodiment of this utility model;

[0036] Figure 11 This is a structural diagram of the blade shell of a nose hair trimmer according to a specific embodiment of the present invention;

[0037] Figure 12 This is a structural diagram of the third type of nose hair trimmer head according to a specific embodiment of the present utility model, wherein the swing arm and the two transmission parts adopt a gear meshing transmission method.

[0038] Figure 13 This is a diagram showing the internal structure of the third type of nose hair trimmer blade in a specific embodiment of this utility model;

[0039] Figure 14 This is a structural diagram of the fourth type of nose hair trimmer head according to a specific embodiment of the present utility model. The transmission swing arm and the eccentric transmission part adopt a gear meshing transmission method, and the drive part adopts a transmission shaft and transmission groove cooperation transmission method.

[0040] Figure 15 This is a diagram showing the internal structure of the fourth type of nose hair trimmer blade in a specific embodiment of this utility model.

[0041] Figure 16 A structural diagram of the assembly of the shaver head in a specific embodiment of this utility model;

[0042] Figure 17 This is a structural diagram of the two moving blades of the shaver head according to a specific embodiment of this utility model.

[0043] In the diagram: Reciprocating shaver body A, output component A1, motor output shaft A2, oscillation bridge A3;

[0044] Shaver head B, shaver foil B1, moving blade B2, shaver head housing B3, shaver holder B4, drive groove B41;

[0045] Nose hair trimmer blade B', blade assembly B1', inner blade B11', outer blade B12', transmission component B2', blade housing B3', cover B31', raised part B32', channel B321', housing B4', through port B41', power transmission part B21', drive groove B211', transmission swing arm B5', eccentric transmission part B22', drive part B111', transmission shaft A B61', transmission groove A B62', transmission groove AB62', transmission shaft B B63', transmission groove B B64', drive seat B7', pin B8', hook B322', annular groove B121'. Detailed Implementation

[0046] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] like Figure 1-17As shown, this utility model discloses a reciprocating hair trimmer, comprising a reciprocating shaver body A and a shaver head B or a nose hair trimmer head B' adapted to the body. The reciprocating shaver body A has a power system that drives at least one output component A1 to rotate. The output component A1 is offset from the center of the motor output shaft A2 in the power system. The shaver head B includes a foil B1, a moving blade B2, and a head housing B3. The moving blade B2 is driven by the output component A1 and can reciprocate linearly relative to the foil B1 to cut beard hairs. The nose hair trimmer head B' includes a head assembly B1', a transmission component B2', and a head housing B3. The blade assembly B1' includes an inner blade B11' and an outer blade B12'. The inner blade 11 and the outer blade 12 are generally cylindrical and have circumferentially distributed cutting teeth at their ends, and the distribution of the cutting teeth is generally sparse. The inner blade B11' is connected to the transmission member B2'. The transmission member B2' is pivotally engaged with the housing B4'. The transmission member B2' has a power transmission part B21' that is off-center. The power transmission part B21' can be driven by the output member A1, thereby driving the transmission member B2' to rotate and reciprocate around its central axis. The inner blade B11' is driven by the transmission member B2' to rotate and reciprocate relative to the outer blade B12' to cut nose hairs. Specifically, it also includes an oscillating bridge A3 mounted on the motor output shaft A2. The oscillating bridge A3 has two output components A1, and the two output components A1 are positioned at the same distance from the center of the motor output shaft A2. The output components are shafts. The transmission component B2' in the nose hair trimmer head B' has a pair of power transmission parts B21'. The pair of power transmission parts B21' has drive grooves B211' that mate with the output components A1. The housing B4' has an opening B41' below the pair of drive grooves B211'. Of course, the output component can be a groove, and the power transmission part 21 is provided with a shaft that mates with the groove. The moving blades B2 in the shaver head B have at least two sets, and are mounted on their respective blade holders B4. Both blade holders B4 have a pair of drive grooves B41 that mate with the two output components A1. Of course, there can be only one output component.

[0048] Specifically, the nose hair trimmer head B' has a head housing B3' that can be adapted to the body of a reciprocating shaver. The head housing B3' has a cover B31' for covering the upper part of the reciprocating shaver body and a raised portion B32'. The cover B31' also covers the housing B4' and the transmission component B2'. The raised portion B32' has a channel B321' that adapts to the outer blade and allows the inner and outer blades to extend. The outer blade B12' is also fixed to the inner side of the raised portion B32' by snap-fit ​​positioning or screws. The outer circumference of the raised portion has a conical structure that gradually narrows from the bottom to the top. The inner side of the raised portion has a hook B322', and the outer circumference of the outer blade 12 has an annular groove B121' that cooperates with the hook. The head housing B3' and the housing B4' can be integrated or separate.

[0049] When the inner blade B11' and the transmission component B2' are directly driven, or when the inner blade B11' and the transmission component B2' are sleeved together and synchronously rotated by inserting a pin B8', or connected by a snap-fit ​​or screw, the sleeved connection first provides a preliminary and stable connection foundation between the inner blade and the transmission component. The addition of the pin further enhances the stability of this connection. Furthermore, the user can easily remove the pin to assemble and disassemble the inner blade. Alternatively, the inner blade can be integrally fixed to the center of the transmission component. The central axis around which the reciprocating motion of the inner blade reciprocates is the same axis as the central axis around which the reciprocating motion of the transmission component reciprocates. In use, the nose hair trimmer head of this product is assembled onto the body of the reciprocating shaver. When the motor of the reciprocating shaver's power system starts, it drives the output component to rotate. This output component, through transmission engagement with the power transmission part on the transmission component, drives the transmission component to rotate and reciprocate around its center, subsequently driving the inner blade to rotate and reciprocate synchronously. The inner blade performs a cutting action relative to the stationary or relatively stationary outer blade, effectively trimming nose hairs.

[0050] When the inner blade B11' and the transmission member B2' are indirectly driven, the swing amplitude of the reciprocating motion of the inner blade B11' is greater than that of the reciprocating motion of the transmission member B2'. A transmission swing arm B5' is provided between the transmission member B2' and the inner blade B11'. The transmission swing arm B5' is pivotally engaged with the housing B4'. One end of the transmission swing arm B5' is connected to the eccentric transmission part B22' on the transmission member B2', and the other end is connected to the drive part B111' which is off-center from the inner blade B11'. The drive part B111' rotates synchronously with the inner blade B11'. The eccentric transmission part is off-center from the transmission member and is fixed or integrally provided. The effective transmission arm length I output by the eccentric transmission part B22' is greater than the effective transmission arm length II input by the transmission swing arm B5', or the effective transmission arm length III output by the transmission swing arm B5' is greater than the effective transmission arm length IV input by the drive part B111'. The transmission arm B5', eccentric transmission part B22', and drive part B111' are connected via gear meshing or a transmission shaft and transmission groove. Specifically, the eccentric transmission part B22' has a transmission shaft A B61' or a transmission groove A B62', and the transmission arm B5' has a corresponding transmission groove A B62' or transmission shaft A B61' offset from its swing center. The transmission shaft A B61' is inserted into the transmission groove A B62' to achieve the transmission connection between the transmission component B2' and the transmission arm B5'. The drive part B111' has a transmission shaft BB63' or a transmission groove BB64', and the transmission arm B5' has a corresponding transmission groove BB64' or transmission shaft BB63' offset from its swing center. The transmission shaft BB63' is inserted into the transmission groove BB64' to achieve the transmission connection between the drive part B111' and the transmission arm B5', thereby driving the inner cutter B11'. When the transmission component swings, it drives the transmission arm to swing through the transmission groove A or transmission shaft A. Then, through the transmission groove B or transmission shaft B, the power is transmitted to the inner cutter. Of course, the transmission arm can also be driven by gear meshing with the eccentric transmission part and the drive part. The outer edge of the meshing of the eccentric transmission part, the transmission arm, and the drive part has teeth. The gear can be a cylindrical gear or a gear with a segment of an arc; or it can be driven by gear meshing with one of them and by the other by the drive shaft and transmission groove. The central axis around which the reciprocating motion of the inner cutter revolves is the same axis as the central axis around which the reciprocating motion of the transmission component revolves, but they can also be different axes. Specifically, the inner cutter B11' is provided with a drive seat B7'. The inner cutter B11' and the drive seat B7' are also connected by a pin B8' to achieve synchronous rotation, or by a snap-fit ​​or screw connection. The drive part B111' is integrally set on the drive seat B7'; or the inner cutter is directly fixed to the drive seat B7' or integrally set.The housing B4' has a main shaft B41', the transmission component B2' is pivotally sleeved on the outside of the main shaft B41', the drive seat B7' sleeved on the lower end of the inner blade B11' is rotatably connected to the center of the main shaft B41' via the support shaft B9', the center of the main shaft B41' has a shaft cavity for the insertion of the support shaft B9'; the housing B4' is provided with a support shaft B42' offset from the main shaft B41', and the transmission swing arm is pivotally connected to the housing B4' via the support shaft B42'. When in use, attach the nose hair trimmer head of this product to the body of the reciprocating shaver. When the power system of the reciprocating shaver is started, the output component begins to rotate. This output component is driven by the power transmission unit on the transmission component to rotate and swing back and forth around its center. Then, through the transmission arm, the eccentric transmission unit and the drive unit are connected to achieve the rotation and reciprocating swing of the inner blade. During the reciprocating swing, the inner blade performs a cutting action relative to the stationary or relatively stationary outer blade, effectively trimming nose hairs.

[0051] This trimmer is designed to combine shaving and nose hair trimming functions. The function can be switched by changing different blades, which is both convenient and practical, meeting the diverse needs of users.

[0052] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0053] Furthermore, in this utility model, the use of terms such as "first," "second," "I," and "II" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0054] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A reciprocating hair trimmer characterized by: The reciprocating shaver body (A) and the nose hair trimmer head (B') or the shaving head (B) which can be fitted to the shaver body, wherein the reciprocating shaver body (A) has a power system driving at least one output (A1) rotating, the output (A1) is arranged off-center from the motor output shaft (A2) in the power system, wherein the shaving head (B) comprises a cutter net (B1), a moving cutter (B2) and a head housing (B3), the moving cutter (B2) is drivingly connected with the output (A1), the moving cutter (B2) is driven by the output (A1) to cut the beard in linear reciprocating motion relative to the cutter net (B1); wherein the nose hair trimmer head (B') comprises a head assembly (B1'), a transmission member (B2'), a head housing (B3') and a housing base (B4'), the head assembly (B1') comprises an inner cutter (B11') and an outer cutter (B12'), the inner cutter (B11') is drivingly connected with the transmission member (B2'), the transmission member (B2') is pivotally connected to the housing base (B4') with the power transmission part (B21') off-center from the center, the power transmission part (B21') can receive the driving of the output (A1) to drive the transmission member (B2') to rotate reciprocatingly around the central axis, the inner cutter (B11') is driven by the transmission member (B2') to cut the nose hair in reciprocating rotation relative to the outer cutter (B12').

2. The reciprocating hair trimmer of claim 1, wherein: The inner cutter (B11') and the transmission member (B2') are indirectly connected, wherein the swing amplitude of the reciprocating motion of the inner cutter (B11') is greater than the swing amplitude of the reciprocating motion of the transmission member (B2').

3. The reciprocating hair trimmer of claim 2, wherein: A transmission swing arm (B5') is arranged between the transmission member (B2') and the inner cutter (B11'), the transmission swing arm (B5') is pivotally connected to the housing base (B4'), one end of the transmission swing arm (B5') is drivingly connected with the eccentric transmission part (B22') on the transmission member (B2'), the other end is drivingly connected with the driving part (B111') off-center from the inner cutter (B11'), the driving part (B111') rotates synchronously with the inner cutter (B11'), the effective transmission arm length (I) output by the eccentric transmission part (B22') is greater than the effective transmission arm length (II) input by the transmission swing arm (B5'), or the effective transmission arm length (III) output by the transmission swing arm (B5') is greater than the effective transmission arm length (IV) input by the driving part (B111').

4. The reciprocating hair trimmer of claim 3, wherein: The transmission mode of the transmission swing arm (B5') with the eccentric transmission part (B22') and the driving part (B111') adopts gear meshing transmission or transmission shaft and transmission groove cooperation transmission.

5. The reciprocating hair trimmer of claim 4, wherein: The eccentric transmission part (B22') has a transmission shaft A (B61') or a transmission groove A (B62'), and the transmission swing arm (B5') has a corresponding transmission groove A (B62') or transmission shaft A (B61') deviating from the swing center, and the transmission shaft A (B61') is inserted into the transmission groove A (B62') to realize the transmission connection between the transmission part (B2') and the transmission swing arm (B5'); the driving part (B111') has a transmission shaft B (B63') or a transmission groove B (B64'), and the transmission swing arm (B5') has a corresponding transmission groove B (B64') or transmission shaft B (B63') deviating from the swing center, and the transmission shaft B (B63') is inserted into the transmission groove B (B64') to realize the transmission connection between the driving part (B111') and the transmission swing arm (B5').

6. The reciprocating hair trimmer of claim 5, wherein: The inner cutter (B11') is provided with a driving seat (B7'), and the inner cutter (B11') and the driving seat (B7') rotate synchronously, and the driving part (B111') is arranged on the driving seat (B7').

7. The reciprocating hair trimmer of claim 1, wherein: The inner cutter (B11') is directly driven by the transmission part (B2'), and the inner cutter (B11') rotates synchronously with the transmission part (B2').

8. The reciprocating hair trimmer according to claim 1 or 2 or 7, characterized in that: The central axis around which the inner cutter (B11') reciprocates is the same as the central axis around which the transmission part (B2') reciprocates.

9. The reciprocating hair trimmer according to any one of claims 1-7, characterized in that: The nose hair trimmer cutter head (B') further comprises an oscillating bridge (A3) mounted on the motor output shaft (A2), and the oscillating bridge (A3) has two output parts (A1) positioned at the same distance from the center of the motor output shaft (A2), wherein the transmission part (B2') in the nose hair trimmer cutter head (B') has a pair of power transmission parts (B21'), and the pair of power transmission parts (B21') have driving grooves (B211') matched with the output parts (A1), and the shell seat (B4') has a through port (B41') below the pair of driving grooves (B211').

10. The reciprocating hair trimmer according to any one of claims 1-7, characterized in that: The cutter head shell (B3') of the nose hair trimmer cutter head (B') can be adapted to a reciprocating shaver body, and the cutter head shell (B3') has a covering part (B31') for covering the upper end of the reciprocating shaver body and a raised part (B32'), the covering part (B31') also covers the shell seat (B4') and the transmission part (B2'), the raised part (B32') has a channel (B321') inside for accommodating the outer cutter and allowing the inner cutter and the outer cutter to extend out, and the outer cutter (B12') is also positioned and connected with the raised part (B32'), and the outer peripheral surface of the raised part (B32') is a tapered structure.

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